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 | { | |
b8868e45 | 124 | usbip_dbg_vhci_rh("rh_port_connect %d\n", rhport); |
04679b34 | 125 | |
50b66b5c | 126 | spin_lock(&the_controller->lock); |
04679b34 TH |
127 | |
128 | the_controller->port_status[rhport] |= USB_PORT_STAT_CONNECTION | |
129 | | (1 << USB_PORT_FEAT_C_CONNECTION); | |
130 | ||
131 | switch (speed) { | |
132 | case USB_SPEED_HIGH: | |
133 | the_controller->port_status[rhport] |= USB_PORT_STAT_HIGH_SPEED; | |
134 | break; | |
135 | case USB_SPEED_LOW: | |
136 | the_controller->port_status[rhport] |= USB_PORT_STAT_LOW_SPEED; | |
137 | break; | |
138 | default: | |
139 | break; | |
140 | } | |
141 | ||
50b66b5c | 142 | spin_unlock(&the_controller->lock); |
04679b34 TH |
143 | |
144 | usb_hcd_poll_rh_status(vhci_to_hcd(the_controller)); | |
145 | } | |
146 | ||
20960fac | 147 | static void rh_port_disconnect(int rhport) |
04679b34 | 148 | { |
b8868e45 | 149 | usbip_dbg_vhci_rh("rh_port_disconnect %d\n", rhport); |
04679b34 | 150 | |
50b66b5c | 151 | spin_lock(&the_controller->lock); |
c7f00899 | 152 | |
04679b34 TH |
153 | the_controller->port_status[rhport] &= ~USB_PORT_STAT_CONNECTION; |
154 | the_controller->port_status[rhport] |= | |
155 | (1 << USB_PORT_FEAT_C_CONNECTION); | |
156 | ||
50b66b5c | 157 | spin_unlock(&the_controller->lock); |
0c9a32f0 | 158 | usb_hcd_poll_rh_status(vhci_to_hcd(the_controller)); |
04679b34 TH |
159 | } |
160 | ||
071d1d47 | 161 | #define PORT_C_MASK \ |
162 | ((USB_PORT_STAT_C_CONNECTION \ | |
163 | | USB_PORT_STAT_C_ENABLE \ | |
164 | | USB_PORT_STAT_C_SUSPEND \ | |
165 | | USB_PORT_STAT_C_OVERCURRENT \ | |
04679b34 TH |
166 | | USB_PORT_STAT_C_RESET) << 16) |
167 | ||
168 | /* | |
7489301a BW |
169 | * Returns 0 if the status hasn't changed, or the number of bytes in buf. |
170 | * Ports are 0-indexed from the HCD point of view, | |
171 | * and 1-indexed from the USB core pointer of view. | |
04679b34 TH |
172 | * |
173 | * @buf: a bitmap to show which port status has been changed. | |
7489301a | 174 | * bit 0: reserved |
04679b34 TH |
175 | * bit 1: the status of port 0 has been changed. |
176 | * bit 2: the status of port 1 has been changed. | |
177 | * ... | |
04679b34 TH |
178 | */ |
179 | static int vhci_hub_status(struct usb_hcd *hcd, char *buf) | |
180 | { | |
181 | struct vhci_hcd *vhci; | |
7489301a | 182 | int retval; |
04679b34 TH |
183 | int rhport; |
184 | int changed = 0; | |
185 | ||
7489301a BW |
186 | retval = DIV_ROUND_UP(VHCI_NPORTS + 1, 8); |
187 | memset(buf, 0, retval); | |
04679b34 TH |
188 | |
189 | vhci = hcd_to_vhci(hcd); | |
190 | ||
50b66b5c | 191 | spin_lock(&vhci->lock); |
541c7d43 | 192 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
7489301a | 193 | usbip_dbg_vhci_rh("hw accessible flag not on?\n"); |
04679b34 TH |
194 | goto done; |
195 | } | |
196 | ||
197 | /* check pseudo status register for each port */ | |
198 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) { | |
199 | if ((vhci->port_status[rhport] & PORT_C_MASK)) { | |
200 | /* The status of a port has been changed, */ | |
7489301a | 201 | usbip_dbg_vhci_rh("port %d status changed\n", rhport); |
04679b34 | 202 | |
7489301a | 203 | buf[(rhport + 1) / 8] |= 1 << (rhport + 1) % 8; |
04679b34 TH |
204 | changed = 1; |
205 | } | |
206 | } | |
207 | ||
107f04bb | 208 | if ((hcd->state == HC_STATE_SUSPENDED) && (changed == 1)) |
04679b34 TH |
209 | usb_hcd_resume_root_hub(hcd); |
210 | ||
04679b34 | 211 | done: |
50b66b5c | 212 | spin_unlock(&vhci->lock); |
7489301a | 213 | return changed ? retval : 0; |
04679b34 TH |
214 | } |
215 | ||
04679b34 TH |
216 | static inline void hub_descriptor(struct usb_hub_descriptor *desc) |
217 | { | |
218 | memset(desc, 0, sizeof(*desc)); | |
219 | desc->bDescriptorType = 0x29; | |
220 | desc->bDescLength = 9; | |
d0306a51 | 221 | desc->wHubCharacteristics = (__constant_cpu_to_le16(0x0001)); |
04679b34 | 222 | desc->bNbrPorts = VHCI_NPORTS; |
dbe79bbe JY |
223 | desc->u.hs.DeviceRemovable[0] = 0xff; |
224 | desc->u.hs.DeviceRemovable[1] = 0xff; | |
04679b34 TH |
225 | } |
226 | ||
227 | static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, | |
228 | u16 wIndex, char *buf, u16 wLength) | |
229 | { | |
230 | struct vhci_hcd *dum; | |
231 | int retval = 0; | |
04679b34 TH |
232 | int rhport; |
233 | ||
234 | u32 prev_port_status[VHCI_NPORTS]; | |
235 | ||
541c7d43 | 236 | if (!HCD_HW_ACCESSIBLE(hcd)) |
04679b34 TH |
237 | return -ETIMEDOUT; |
238 | ||
239 | /* | |
240 | * NOTE: | |
241 | * wIndex shows the port number and begins from 1. | |
242 | */ | |
b8868e45 | 243 | usbip_dbg_vhci_rh("typeReq %x wValue %x wIndex %x\n", typeReq, wValue, |
071d1d47 | 244 | wIndex); |
04679b34 | 245 | if (wIndex > VHCI_NPORTS) |
1a4b6f66 | 246 | pr_err("invalid port number %d\n", wIndex); |
04679b34 TH |
247 | rhport = ((__u8)(wIndex & 0x00ff)) - 1; |
248 | ||
249 | dum = hcd_to_vhci(hcd); | |
250 | ||
50b66b5c | 251 | spin_lock(&dum->lock); |
04679b34 TH |
252 | |
253 | /* store old status and compare now and old later */ | |
b8868e45 | 254 | if (usbip_dbg_flag_vhci_rh) { |
6f480bf9 MN |
255 | memcpy(prev_port_status, dum->port_status, |
256 | sizeof(prev_port_status)); | |
04679b34 TH |
257 | } |
258 | ||
259 | switch (typeReq) { | |
260 | case ClearHubFeature: | |
b8868e45 | 261 | usbip_dbg_vhci_rh(" ClearHubFeature\n"); |
04679b34 TH |
262 | break; |
263 | case ClearPortFeature: | |
264 | switch (wValue) { | |
265 | case USB_PORT_FEAT_SUSPEND: | |
266 | if (dum->port_status[rhport] & USB_PORT_STAT_SUSPEND) { | |
267 | /* 20msec signaling */ | |
268 | dum->resuming = 1; | |
269 | dum->re_timeout = | |
270 | jiffies + msecs_to_jiffies(20); | |
271 | } | |
272 | break; | |
273 | case USB_PORT_FEAT_POWER: | |
90ae9d44 | 274 | usbip_dbg_vhci_rh(" ClearPortFeature: USB_PORT_FEAT_POWER\n"); |
04679b34 | 275 | dum->port_status[rhport] = 0; |
04679b34 TH |
276 | dum->resuming = 0; |
277 | break; | |
278 | case USB_PORT_FEAT_C_RESET: | |
90ae9d44 | 279 | usbip_dbg_vhci_rh(" ClearPortFeature: USB_PORT_FEAT_C_RESET\n"); |
04679b34 TH |
280 | switch (dum->vdev[rhport].speed) { |
281 | case USB_SPEED_HIGH: | |
282 | dum->port_status[rhport] |= | |
071d1d47 | 283 | USB_PORT_STAT_HIGH_SPEED; |
04679b34 TH |
284 | break; |
285 | case USB_SPEED_LOW: | |
286 | dum->port_status[rhport] |= | |
071d1d47 | 287 | USB_PORT_STAT_LOW_SPEED; |
04679b34 TH |
288 | break; |
289 | default: | |
290 | break; | |
291 | } | |
292 | default: | |
b8868e45 | 293 | usbip_dbg_vhci_rh(" ClearPortFeature: default %x\n", |
071d1d47 | 294 | wValue); |
04679b34 | 295 | dum->port_status[rhport] &= ~(1 << wValue); |
49aecefc | 296 | break; |
04679b34 TH |
297 | } |
298 | break; | |
299 | case GetHubDescriptor: | |
b8868e45 | 300 | usbip_dbg_vhci_rh(" GetHubDescriptor\n"); |
04679b34 TH |
301 | hub_descriptor((struct usb_hub_descriptor *) buf); |
302 | break; | |
303 | case GetHubStatus: | |
b8868e45 | 304 | usbip_dbg_vhci_rh(" GetHubStatus\n"); |
04679b34 TH |
305 | *(__le32 *) buf = __constant_cpu_to_le32(0); |
306 | break; | |
307 | case GetPortStatus: | |
b8868e45 | 308 | usbip_dbg_vhci_rh(" GetPortStatus port %x\n", wIndex); |
04679b34 | 309 | if (wIndex > VHCI_NPORTS || wIndex < 1) { |
1a4b6f66 | 310 | pr_err("invalid port number %d\n", wIndex); |
04679b34 TH |
311 | retval = -EPIPE; |
312 | } | |
313 | ||
c7f00899 | 314 | /* we do not care about resume. */ |
04679b34 TH |
315 | |
316 | /* whoever resets or resumes must GetPortStatus to | |
317 | * complete it!! | |
c7f00899 | 318 | */ |
04679b34 | 319 | if (dum->resuming && time_after(jiffies, dum->re_timeout)) { |
04679b34 | 320 | dum->port_status[rhport] |= |
87352760 | 321 | (1 << USB_PORT_FEAT_C_SUSPEND); |
04679b34 | 322 | dum->port_status[rhport] &= |
87352760 | 323 | ~(1 << USB_PORT_FEAT_SUSPEND); |
04679b34 TH |
324 | dum->resuming = 0; |
325 | dum->re_timeout = 0; | |
04679b34 TH |
326 | } |
327 | ||
328 | if ((dum->port_status[rhport] & (1 << USB_PORT_FEAT_RESET)) != | |
071d1d47 | 329 | 0 && time_after(jiffies, dum->re_timeout)) { |
04679b34 | 330 | dum->port_status[rhport] |= |
071d1d47 | 331 | (1 << USB_PORT_FEAT_C_RESET); |
04679b34 | 332 | dum->port_status[rhport] &= |
071d1d47 | 333 | ~(1 << USB_PORT_FEAT_RESET); |
04679b34 TH |
334 | dum->re_timeout = 0; |
335 | ||
336 | if (dum->vdev[rhport].ud.status == | |
071d1d47 | 337 | VDEV_ST_NOTASSIGNED) { |
90ae9d44 | 338 | usbip_dbg_vhci_rh(" enable rhport %d (status %u)\n", |
071d1d47 | 339 | rhport, |
340 | dum->vdev[rhport].ud.status); | |
04679b34 | 341 | dum->port_status[rhport] |= |
071d1d47 | 342 | USB_PORT_STAT_ENABLE; |
04679b34 | 343 | } |
04679b34 | 344 | } |
d0306a51 TB |
345 | ((__le16 *) buf)[0] = cpu_to_le16(dum->port_status[rhport]); |
346 | ((__le16 *) buf)[1] = cpu_to_le16(dum->port_status[rhport] >> 16); | |
04679b34 | 347 | |
b8868e45 | 348 | usbip_dbg_vhci_rh(" GetPortStatus bye %x %x\n", ((u16 *)buf)[0], |
071d1d47 | 349 | ((u16 *)buf)[1]); |
04679b34 TH |
350 | break; |
351 | case SetHubFeature: | |
b8868e45 | 352 | usbip_dbg_vhci_rh(" SetHubFeature\n"); |
04679b34 TH |
353 | retval = -EPIPE; |
354 | break; | |
355 | case SetPortFeature: | |
356 | switch (wValue) { | |
357 | case USB_PORT_FEAT_SUSPEND: | |
90ae9d44 | 358 | usbip_dbg_vhci_rh(" SetPortFeature: USB_PORT_FEAT_SUSPEND\n"); |
04679b34 TH |
359 | break; |
360 | case USB_PORT_FEAT_RESET: | |
90ae9d44 | 361 | usbip_dbg_vhci_rh(" SetPortFeature: USB_PORT_FEAT_RESET\n"); |
04679b34 TH |
362 | /* if it's already running, disconnect first */ |
363 | if (dum->port_status[rhport] & USB_PORT_STAT_ENABLE) { | |
364 | dum->port_status[rhport] &= | |
071d1d47 | 365 | ~(USB_PORT_STAT_ENABLE | |
366 | USB_PORT_STAT_LOW_SPEED | | |
367 | USB_PORT_STAT_HIGH_SPEED); | |
04679b34 TH |
368 | /* FIXME test that code path! */ |
369 | } | |
370 | /* 50msec reset signaling */ | |
371 | dum->re_timeout = jiffies + msecs_to_jiffies(50); | |
372 | ||
373 | /* FALLTHROUGH */ | |
374 | default: | |
b8868e45 | 375 | usbip_dbg_vhci_rh(" SetPortFeature: default %d\n", |
071d1d47 | 376 | wValue); |
04679b34 | 377 | dum->port_status[rhport] |= (1 << wValue); |
49aecefc | 378 | break; |
04679b34 TH |
379 | } |
380 | break; | |
381 | ||
382 | default: | |
1a4b6f66 | 383 | pr_err("default: no such request\n"); |
04679b34 TH |
384 | |
385 | /* "protocol stall" on error */ | |
386 | retval = -EPIPE; | |
387 | } | |
388 | ||
b8868e45 | 389 | if (usbip_dbg_flag_vhci_rh) { |
1a4b6f66 | 390 | pr_debug("port %d\n", rhport); |
bfb4ce20 MN |
391 | /* Only dump valid port status */ |
392 | if (rhport >= 0) { | |
4a3ca2be MN |
393 | dump_port_status_diff(prev_port_status[rhport], |
394 | dum->port_status[rhport]); | |
bfb4ce20 | 395 | } |
04679b34 | 396 | } |
b8868e45 | 397 | usbip_dbg_vhci_rh(" bye\n"); |
04679b34 | 398 | |
50b66b5c | 399 | spin_unlock(&dum->lock); |
04679b34 TH |
400 | |
401 | return retval; | |
402 | } | |
403 | ||
04679b34 TH |
404 | static struct vhci_device *get_vdev(struct usb_device *udev) |
405 | { | |
406 | int i; | |
407 | ||
408 | if (!udev) | |
409 | return NULL; | |
410 | ||
411 | for (i = 0; i < VHCI_NPORTS; i++) | |
412 | if (the_controller->vdev[i].udev == udev) | |
413 | return port_to_vdev(i); | |
414 | ||
415 | return NULL; | |
416 | } | |
417 | ||
418 | static void vhci_tx_urb(struct urb *urb) | |
419 | { | |
420 | struct vhci_device *vdev = get_vdev(urb->dev); | |
421 | struct vhci_priv *priv; | |
04679b34 TH |
422 | |
423 | if (!vdev) { | |
1a4b6f66 | 424 | pr_err("could not get virtual device"); |
04679b34 TH |
425 | return; |
426 | } | |
427 | ||
b8868e45 | 428 | priv = kzalloc(sizeof(struct vhci_priv), GFP_ATOMIC); |
04679b34 | 429 | if (!priv) { |
04679b34 TH |
430 | usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC); |
431 | return; | |
432 | } | |
433 | ||
78110bb8 JP |
434 | spin_lock(&vdev->priv_lock); |
435 | ||
04679b34 TH |
436 | priv->seqnum = atomic_inc_return(&the_controller->seqnum); |
437 | if (priv->seqnum == 0xffff) | |
1a4b6f66 | 438 | dev_info(&urb->dev->dev, "seqnum max\n"); |
04679b34 TH |
439 | |
440 | priv->vdev = vdev; | |
441 | priv->urb = urb; | |
442 | ||
443 | urb->hcpriv = (void *) priv; | |
444 | ||
04679b34 TH |
445 | list_add_tail(&priv->list, &vdev->priv_tx); |
446 | ||
447 | wake_up(&vdev->waitq_tx); | |
50b66b5c | 448 | spin_unlock(&vdev->priv_lock); |
04679b34 TH |
449 | } |
450 | ||
451 | static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, | |
452 | gfp_t mem_flags) | |
453 | { | |
454 | struct device *dev = &urb->dev->dev; | |
455 | int ret = 0; | |
6d212153 | 456 | struct vhci_device *vdev; |
04679b34 | 457 | |
b8868e45 | 458 | usbip_dbg_vhci_hc("enter, usb_hcd %p urb %p mem_flags %d\n", |
071d1d47 | 459 | hcd, urb, mem_flags); |
04679b34 TH |
460 | |
461 | /* patch to usb_sg_init() is in 2.5.60 */ | |
462 | BUG_ON(!urb->transfer_buffer && urb->transfer_buffer_length); | |
463 | ||
50b66b5c | 464 | spin_lock(&the_controller->lock); |
04679b34 | 465 | |
04679b34 TH |
466 | if (urb->status != -EINPROGRESS) { |
467 | dev_err(dev, "URB already unlinked!, status %d\n", urb->status); | |
50b66b5c | 468 | spin_unlock(&the_controller->lock); |
04679b34 TH |
469 | return urb->status; |
470 | } | |
471 | ||
01446ef5 | 472 | vdev = port_to_vdev(urb->dev->portnum-1); |
6d212153 MV |
473 | |
474 | /* refuse enqueue for dead connection */ | |
475 | spin_lock(&vdev->ud.lock); | |
071d1d47 | 476 | if (vdev->ud.status == VDEV_ST_NULL || |
477 | vdev->ud.status == VDEV_ST_ERROR) { | |
1a4b6f66 | 478 | dev_err(dev, "enqueue for inactive port %d\n", vdev->rhport); |
6d212153 | 479 | spin_unlock(&vdev->ud.lock); |
50b66b5c | 480 | spin_unlock(&the_controller->lock); |
6d212153 MV |
481 | return -ENODEV; |
482 | } | |
483 | spin_unlock(&vdev->ud.lock); | |
484 | ||
04679b34 TH |
485 | ret = usb_hcd_link_urb_to_ep(hcd, urb); |
486 | if (ret) | |
487 | goto no_need_unlink; | |
488 | ||
489 | /* | |
b8868e45 | 490 | * The enumeration process is as follows; |
04679b34 TH |
491 | * |
492 | * 1. Get_Descriptor request to DevAddrs(0) EndPoint(0) | |
493 | * to get max packet length of default pipe | |
494 | * | |
495 | * 2. Set_Address request to DevAddr(0) EndPoint(0) | |
496 | * | |
497 | */ | |
04679b34 TH |
498 | if (usb_pipedevice(urb->pipe) == 0) { |
499 | __u8 type = usb_pipetype(urb->pipe); | |
500 | struct usb_ctrlrequest *ctrlreq = | |
071d1d47 | 501 | (struct usb_ctrlrequest *) urb->setup_packet; |
04679b34 TH |
502 | |
503 | if (type != PIPE_CONTROL || !ctrlreq) { | |
504 | dev_err(dev, "invalid request to devnum 0\n"); | |
a7cd5829 | 505 | ret = -EINVAL; |
04679b34 TH |
506 | goto no_need_xmit; |
507 | } | |
508 | ||
509 | switch (ctrlreq->bRequest) { | |
510 | case USB_REQ_SET_ADDRESS: | |
511 | /* set_address may come when a device is reset */ | |
512 | dev_info(dev, "SetAddress Request (%d) to port %d\n", | |
513 | ctrlreq->wValue, vdev->rhport); | |
514 | ||
7606ee8a MV |
515 | if (vdev->udev) |
516 | usb_put_dev(vdev->udev); | |
517 | vdev->udev = usb_get_dev(urb->dev); | |
04679b34 TH |
518 | |
519 | spin_lock(&vdev->ud.lock); | |
520 | vdev->ud.status = VDEV_ST_USED; | |
521 | spin_unlock(&vdev->ud.lock); | |
522 | ||
523 | if (urb->status == -EINPROGRESS) { | |
524 | /* This request is successfully completed. */ | |
525 | /* If not -EINPROGRESS, possibly unlinked. */ | |
526 | urb->status = 0; | |
527 | } | |
528 | ||
529 | goto no_need_xmit; | |
530 | ||
531 | case USB_REQ_GET_DESCRIPTOR: | |
d0306a51 | 532 | if (ctrlreq->wValue == cpu_to_le16(USB_DT_DEVICE << 8)) |
90ae9d44 | 533 | usbip_dbg_vhci_hc("Not yet?:Get_Descriptor to device 0 (get max pipe size)\n"); |
04679b34 | 534 | |
7606ee8a MV |
535 | if (vdev->udev) |
536 | usb_put_dev(vdev->udev); | |
537 | vdev->udev = usb_get_dev(urb->dev); | |
04679b34 TH |
538 | goto out; |
539 | ||
540 | default: | |
541 | /* NOT REACHED */ | |
90ae9d44 | 542 | dev_err(dev, "invalid request to devnum 0 bRequest %u, wValue %u\n", ctrlreq->bRequest, |
04679b34 TH |
543 | ctrlreq->wValue); |
544 | ret = -EINVAL; | |
545 | goto no_need_xmit; | |
546 | } | |
547 | ||
548 | } | |
549 | ||
550 | out: | |
551 | vhci_tx_urb(urb); | |
50b66b5c | 552 | spin_unlock(&the_controller->lock); |
04679b34 TH |
553 | |
554 | return 0; | |
555 | ||
556 | no_need_xmit: | |
557 | usb_hcd_unlink_urb_from_ep(hcd, urb); | |
558 | no_need_unlink: | |
50b66b5c | 559 | spin_unlock(&the_controller->lock); |
04679b34 | 560 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, urb->status); |
a7cd5829 | 561 | return ret; |
04679b34 TH |
562 | } |
563 | ||
564 | /* | |
565 | * vhci_rx gives back the urb after receiving the reply of the urb. If an | |
566 | * unlink pdu is sent or not, vhci_rx receives a normal return pdu and gives | |
567 | * back its urb. For the driver unlinking the urb, the content of the urb is | |
568 | * not important, but the calling to its completion handler is important; the | |
569 | * completion of unlinking is notified by the completion handler. | |
570 | * | |
571 | * | |
572 | * CLIENT SIDE | |
573 | * | |
574 | * - When vhci_hcd receives RET_SUBMIT, | |
575 | * | |
576 | * - case 1a). the urb of the pdu is not unlinking. | |
577 | * - normal case | |
578 | * => just give back the urb | |
579 | * | |
580 | * - case 1b). the urb of the pdu is unlinking. | |
581 | * - usbip.ko will return a reply of the unlinking request. | |
582 | * => give back the urb now and go to case 2b). | |
583 | * | |
584 | * - When vhci_hcd receives RET_UNLINK, | |
585 | * | |
586 | * - case 2a). a submit request is still pending in vhci_hcd. | |
587 | * - urb was really pending in usbip.ko and urb_unlink_urb() was | |
588 | * completed there. | |
589 | * => free a pending submit request | |
590 | * => notify unlink completeness by giving back the urb | |
591 | * | |
592 | * - case 2b). a submit request is *not* pending in vhci_hcd. | |
593 | * - urb was already given back to the core driver. | |
594 | * => do not give back the urb | |
595 | * | |
596 | * | |
597 | * SERVER SIDE | |
598 | * | |
599 | * - When usbip receives CMD_UNLINK, | |
600 | * | |
601 | * - case 3a). the urb of the unlink request is now in submission. | |
602 | * => do usb_unlink_urb(). | |
603 | * => after the unlink is completed, send RET_UNLINK. | |
604 | * | |
605 | * - case 3b). the urb of the unlink request is not in submission. | |
606 | * - may be already completed or never be received | |
607 | * => send RET_UNLINK | |
608 | * | |
609 | */ | |
610 | static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) | |
611 | { | |
04679b34 TH |
612 | struct vhci_priv *priv; |
613 | struct vhci_device *vdev; | |
614 | ||
1a4b6f66 | 615 | pr_info("dequeue a urb %p\n", urb); |
04679b34 | 616 | |
50b66b5c | 617 | spin_lock(&the_controller->lock); |
04679b34 TH |
618 | |
619 | priv = urb->hcpriv; | |
620 | if (!priv) { | |
621 | /* URB was never linked! or will be soon given back by | |
622 | * vhci_rx. */ | |
50b66b5c | 623 | spin_unlock(&the_controller->lock); |
04679b34 TH |
624 | return 0; |
625 | } | |
626 | ||
627 | { | |
628 | int ret = 0; | |
629 | ret = usb_hcd_check_unlink_urb(hcd, urb, status); | |
630 | if (ret) { | |
50b66b5c | 631 | spin_unlock(&the_controller->lock); |
b8868e45 | 632 | return ret; |
04679b34 TH |
633 | } |
634 | } | |
635 | ||
636 | /* send unlink request here? */ | |
637 | vdev = priv->vdev; | |
638 | ||
639 | if (!vdev->ud.tcp_socket) { | |
640 | /* tcp connection is closed */ | |
50b66b5c | 641 | spin_lock(&vdev->priv_lock); |
04679b34 | 642 | |
1a4b6f66 | 643 | pr_info("device %p seems to be disconnected\n", vdev); |
04679b34 TH |
644 | list_del(&priv->list); |
645 | kfree(priv); | |
646 | urb->hcpriv = NULL; | |
647 | ||
50b66b5c | 648 | spin_unlock(&vdev->priv_lock); |
04679b34 | 649 | |
b8868e45 BM |
650 | /* |
651 | * If tcp connection is alive, we have sent CMD_UNLINK. | |
652 | * vhci_rx will receive RET_UNLINK and give back the URB. | |
653 | * Otherwise, we give back it here. | |
654 | */ | |
1a4b6f66 | 655 | pr_info("gives back urb %p\n", urb); |
b8868e45 BM |
656 | |
657 | usb_hcd_unlink_urb_from_ep(hcd, urb); | |
658 | ||
50b66b5c | 659 | spin_unlock(&the_controller->lock); |
b8868e45 | 660 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, |
071d1d47 | 661 | urb->status); |
50b66b5c | 662 | spin_lock(&the_controller->lock); |
b8868e45 | 663 | |
04679b34 TH |
664 | } else { |
665 | /* tcp connection is alive */ | |
04679b34 TH |
666 | struct vhci_unlink *unlink; |
667 | ||
50b66b5c | 668 | spin_lock(&vdev->priv_lock); |
04679b34 TH |
669 | |
670 | /* setup CMD_UNLINK pdu */ | |
671 | unlink = kzalloc(sizeof(struct vhci_unlink), GFP_ATOMIC); | |
672 | if (!unlink) { | |
50b66b5c HY |
673 | spin_unlock(&vdev->priv_lock); |
674 | spin_unlock(&the_controller->lock); | |
04679b34 TH |
675 | usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC); |
676 | return -ENOMEM; | |
677 | } | |
678 | ||
679 | unlink->seqnum = atomic_inc_return(&the_controller->seqnum); | |
680 | if (unlink->seqnum == 0xffff) | |
1a4b6f66 | 681 | pr_info("seqnum max\n"); |
04679b34 TH |
682 | |
683 | unlink->unlink_seqnum = priv->seqnum; | |
684 | ||
1a4b6f66 | 685 | pr_info("device %p seems to be still connected\n", vdev); |
04679b34 TH |
686 | |
687 | /* send cmd_unlink and try to cancel the pending URB in the | |
688 | * peer */ | |
689 | list_add_tail(&unlink->list, &vdev->unlink_tx); | |
690 | wake_up(&vdev->waitq_tx); | |
691 | ||
50b66b5c | 692 | spin_unlock(&vdev->priv_lock); |
04679b34 TH |
693 | } |
694 | ||
50b66b5c | 695 | spin_unlock(&the_controller->lock); |
04679b34 | 696 | |
b8868e45 | 697 | usbip_dbg_vhci_hc("leave\n"); |
04679b34 TH |
698 | return 0; |
699 | } | |
700 | ||
04679b34 TH |
701 | static void vhci_device_unlink_cleanup(struct vhci_device *vdev) |
702 | { | |
703 | struct vhci_unlink *unlink, *tmp; | |
704 | ||
236742de | 705 | spin_lock(&the_controller->lock); |
04679b34 TH |
706 | spin_lock(&vdev->priv_lock); |
707 | ||
708 | list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) { | |
1a4b6f66 | 709 | pr_info("unlink cleanup tx %lu\n", unlink->unlink_seqnum); |
04679b34 TH |
710 | list_del(&unlink->list); |
711 | kfree(unlink); | |
712 | } | |
713 | ||
236742de | 714 | while (!list_empty(&vdev->unlink_rx)) { |
b92a5e23 MV |
715 | struct urb *urb; |
716 | ||
236742de BB |
717 | unlink = list_first_entry(&vdev->unlink_rx, struct vhci_unlink, |
718 | list); | |
719 | ||
b92a5e23 | 720 | /* give back URB of unanswered unlink request */ |
1a4b6f66 | 721 | pr_info("unlink cleanup rx %lu\n", unlink->unlink_seqnum); |
b92a5e23 MV |
722 | |
723 | urb = pickup_urb_and_free_priv(vdev, unlink->unlink_seqnum); | |
724 | if (!urb) { | |
1a4b6f66 | 725 | pr_info("the urb (seqnum %lu) was already given back\n", |
726 | unlink->unlink_seqnum); | |
b92a5e23 MV |
727 | list_del(&unlink->list); |
728 | kfree(unlink); | |
729 | continue; | |
730 | } | |
731 | ||
732 | urb->status = -ENODEV; | |
733 | ||
b92a5e23 | 734 | usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb); |
236742de BB |
735 | |
736 | list_del(&unlink->list); | |
737 | ||
738 | spin_unlock(&vdev->priv_lock); | |
b92a5e23 MV |
739 | spin_unlock(&the_controller->lock); |
740 | ||
071d1d47 | 741 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, |
742 | urb->status); | |
b92a5e23 | 743 | |
236742de BB |
744 | spin_lock(&the_controller->lock); |
745 | spin_lock(&vdev->priv_lock); | |
746 | ||
04679b34 TH |
747 | kfree(unlink); |
748 | } | |
749 | ||
750 | spin_unlock(&vdev->priv_lock); | |
236742de | 751 | spin_unlock(&the_controller->lock); |
04679b34 TH |
752 | } |
753 | ||
754 | /* | |
755 | * The important thing is that only one context begins cleanup. | |
756 | * This is why error handling and cleanup become simple. | |
757 | * We do not want to consider race condition as possible. | |
758 | */ | |
759 | static void vhci_shutdown_connection(struct usbip_device *ud) | |
760 | { | |
761 | struct vhci_device *vdev = container_of(ud, struct vhci_device, ud); | |
762 | ||
763 | /* need this? see stub_dev.c */ | |
764 | if (ud->tcp_socket) { | |
1a4b6f66 | 765 | pr_debug("shutdown tcp_socket %p\n", ud->tcp_socket); |
04679b34 TH |
766 | kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR); |
767 | } | |
768 | ||
c7f00899 | 769 | /* kill threads related to this sdev */ |
cbf7d122 | 770 | if (vdev->ud.tcp_rx) { |
ba46ce30 | 771 | kthread_stop_put(vdev->ud.tcp_rx); |
cbf7d122 | 772 | vdev->ud.tcp_rx = NULL; |
773 | } | |
774 | if (vdev->ud.tcp_tx) { | |
ba46ce30 | 775 | kthread_stop_put(vdev->ud.tcp_tx); |
cbf7d122 | 776 | vdev->ud.tcp_tx = NULL; |
777 | } | |
1a4b6f66 | 778 | pr_info("stop threads\n"); |
04679b34 TH |
779 | |
780 | /* active connection is closed */ | |
3d0a2a22 BB |
781 | if (vdev->ud.tcp_socket) { |
782 | fput(vdev->ud.tcp_socket->file); | |
04679b34 TH |
783 | vdev->ud.tcp_socket = NULL; |
784 | } | |
1a4b6f66 | 785 | pr_info("release socket\n"); |
04679b34 TH |
786 | |
787 | vhci_device_unlink_cleanup(vdev); | |
788 | ||
789 | /* | |
790 | * rh_port_disconnect() is a trigger of ... | |
791 | * usb_disable_device(): | |
792 | * disable all the endpoints for a USB device. | |
793 | * usb_disable_endpoint(): | |
794 | * disable endpoints. pending urbs are unlinked(dequeued). | |
795 | * | |
796 | * NOTE: After calling rh_port_disconnect(), the USB device drivers of a | |
4ec2601f | 797 | * detached device should release used urbs in a cleanup function (i.e. |
04679b34 TH |
798 | * xxx_disconnect()). Therefore, vhci_hcd does not need to release |
799 | * pushed urbs and their private data in this function. | |
800 | * | |
4ec2601f | 801 | * NOTE: vhci_dequeue() must be considered carefully. When shutting down |
04679b34 TH |
802 | * a connection, vhci_shutdown_connection() expects vhci_dequeue() |
803 | * gives back pushed urbs and frees their private data by request of | |
804 | * the cleanup function of a USB driver. When unlinking a urb with an | |
805 | * active connection, vhci_dequeue() does not give back the urb which | |
806 | * is actually given back by vhci_rx after receiving its return pdu. | |
807 | * | |
808 | */ | |
809 | rh_port_disconnect(vdev->rhport); | |
810 | ||
1a4b6f66 | 811 | pr_info("disconnect device\n"); |
04679b34 TH |
812 | } |
813 | ||
814 | ||
815 | static void vhci_device_reset(struct usbip_device *ud) | |
816 | { | |
817 | struct vhci_device *vdev = container_of(ud, struct vhci_device, ud); | |
818 | ||
819 | spin_lock(&ud->lock); | |
820 | ||
821 | vdev->speed = 0; | |
822 | vdev->devid = 0; | |
823 | ||
7606ee8a MV |
824 | if (vdev->udev) |
825 | usb_put_dev(vdev->udev); | |
826 | vdev->udev = NULL; | |
827 | ||
3d0a2a22 BB |
828 | if (ud->tcp_socket) { |
829 | fput(ud->tcp_socket->file); | |
830 | ud->tcp_socket = NULL; | |
831 | } | |
04679b34 TH |
832 | ud->status = VDEV_ST_NULL; |
833 | ||
834 | spin_unlock(&ud->lock); | |
835 | } | |
836 | ||
837 | static void vhci_device_unusable(struct usbip_device *ud) | |
838 | { | |
839 | spin_lock(&ud->lock); | |
04679b34 | 840 | ud->status = VDEV_ST_ERROR; |
04679b34 TH |
841 | spin_unlock(&ud->lock); |
842 | } | |
843 | ||
844 | static void vhci_device_init(struct vhci_device *vdev) | |
845 | { | |
846 | memset(vdev, 0, sizeof(*vdev)); | |
847 | ||
04679b34 TH |
848 | vdev->ud.side = USBIP_VHCI; |
849 | vdev->ud.status = VDEV_ST_NULL; | |
04679b34 TH |
850 | spin_lock_init(&vdev->ud.lock); |
851 | ||
852 | INIT_LIST_HEAD(&vdev->priv_rx); | |
853 | INIT_LIST_HEAD(&vdev->priv_tx); | |
854 | INIT_LIST_HEAD(&vdev->unlink_tx); | |
855 | INIT_LIST_HEAD(&vdev->unlink_rx); | |
04679b34 TH |
856 | spin_lock_init(&vdev->priv_lock); |
857 | ||
858 | init_waitqueue_head(&vdev->waitq_tx); | |
859 | ||
860 | vdev->ud.eh_ops.shutdown = vhci_shutdown_connection; | |
861 | vdev->ud.eh_ops.reset = vhci_device_reset; | |
862 | vdev->ud.eh_ops.unusable = vhci_device_unusable; | |
863 | ||
864 | usbip_start_eh(&vdev->ud); | |
865 | } | |
866 | ||
04679b34 TH |
867 | static int vhci_start(struct usb_hcd *hcd) |
868 | { | |
869 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); | |
870 | int rhport; | |
871 | int err = 0; | |
872 | ||
b8868e45 | 873 | usbip_dbg_vhci_hc("enter vhci_start\n"); |
04679b34 | 874 | |
04679b34 TH |
875 | /* initialize private data of usb_hcd */ |
876 | ||
877 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) { | |
878 | struct vhci_device *vdev = &vhci->vdev[rhport]; | |
879 | vhci_device_init(vdev); | |
880 | vdev->rhport = rhport; | |
881 | } | |
882 | ||
883 | atomic_set(&vhci->seqnum, 0); | |
884 | spin_lock_init(&vhci->lock); | |
885 | ||
04679b34 | 886 | hcd->power_budget = 0; /* no limit */ |
04679b34 TH |
887 | hcd->uses_new_polling = 1; |
888 | ||
04679b34 TH |
889 | /* vhci_hcd is now ready to be controlled through sysfs */ |
890 | err = sysfs_create_group(&vhci_dev(vhci)->kobj, &dev_attr_group); | |
891 | if (err) { | |
1a4b6f66 | 892 | pr_err("create sysfs files\n"); |
04679b34 TH |
893 | return err; |
894 | } | |
895 | ||
896 | return 0; | |
897 | } | |
898 | ||
899 | static void vhci_stop(struct usb_hcd *hcd) | |
900 | { | |
901 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); | |
902 | int rhport = 0; | |
903 | ||
b8868e45 | 904 | usbip_dbg_vhci_hc("stop VHCI controller\n"); |
04679b34 | 905 | |
04679b34 TH |
906 | /* 1. remove the userland interface of vhci_hcd */ |
907 | sysfs_remove_group(&vhci_dev(vhci)->kobj, &dev_attr_group); | |
908 | ||
909 | /* 2. shutdown all the ports of vhci_hcd */ | |
909cc6f9 | 910 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) { |
04679b34 TH |
911 | struct vhci_device *vdev = &vhci->vdev[rhport]; |
912 | ||
913 | usbip_event_add(&vdev->ud, VDEV_EVENT_REMOVED); | |
914 | usbip_stop_eh(&vdev->ud); | |
915 | } | |
04679b34 TH |
916 | } |
917 | ||
04679b34 TH |
918 | static int vhci_get_frame_number(struct usb_hcd *hcd) |
919 | { | |
1a4b6f66 | 920 | pr_err("Not yet implemented\n"); |
04679b34 TH |
921 | return 0; |
922 | } | |
923 | ||
04679b34 TH |
924 | #ifdef CONFIG_PM |
925 | ||
926 | /* FIXME: suspend/resume */ | |
927 | static int vhci_bus_suspend(struct usb_hcd *hcd) | |
928 | { | |
929 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); | |
930 | ||
931 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); | |
932 | ||
50b66b5c | 933 | spin_lock(&vhci->lock); |
04679b34 | 934 | hcd->state = HC_STATE_SUSPENDED; |
50b66b5c | 935 | spin_unlock(&vhci->lock); |
04679b34 TH |
936 | |
937 | return 0; | |
938 | } | |
939 | ||
940 | static int vhci_bus_resume(struct usb_hcd *hcd) | |
941 | { | |
942 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); | |
943 | int rc = 0; | |
944 | ||
945 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); | |
946 | ||
50b66b5c | 947 | spin_lock(&vhci->lock); |
c46cb54d | 948 | if (!HCD_HW_ACCESSIBLE(hcd)) |
04679b34 | 949 | rc = -ESHUTDOWN; |
c46cb54d | 950 | else |
04679b34 | 951 | hcd->state = HC_STATE_RUNNING; |
50b66b5c | 952 | spin_unlock(&vhci->lock); |
04679b34 | 953 | |
87352760 | 954 | return rc; |
04679b34 TH |
955 | } |
956 | ||
957 | #else | |
958 | ||
959 | #define vhci_bus_suspend NULL | |
960 | #define vhci_bus_resume NULL | |
961 | #endif | |
962 | ||
04679b34 TH |
963 | static struct hc_driver vhci_hc_driver = { |
964 | .description = driver_name, | |
965 | .product_desc = driver_desc, | |
966 | .hcd_priv_size = sizeof(struct vhci_hcd), | |
967 | ||
968 | .flags = HCD_USB2, | |
969 | ||
970 | .start = vhci_start, | |
00512687 | 971 | .stop = vhci_stop, |
04679b34 TH |
972 | |
973 | .urb_enqueue = vhci_urb_enqueue, | |
974 | .urb_dequeue = vhci_urb_dequeue, | |
975 | ||
976 | .get_frame_number = vhci_get_frame_number, | |
977 | ||
978 | .hub_status_data = vhci_hub_status, | |
979 | .hub_control = vhci_hub_control, | |
980 | .bus_suspend = vhci_bus_suspend, | |
981 | .bus_resume = vhci_bus_resume, | |
982 | }; | |
983 | ||
984 | static int vhci_hcd_probe(struct platform_device *pdev) | |
985 | { | |
986 | struct usb_hcd *hcd; | |
987 | int ret; | |
988 | ||
b8868e45 | 989 | usbip_dbg_vhci_hc("name %s id %d\n", pdev->name, pdev->id); |
04679b34 | 990 | |
04679b34 TH |
991 | /* |
992 | * Allocate and initialize hcd. | |
993 | * Our private data is also allocated automatically. | |
994 | */ | |
e9133972 | 995 | hcd = usb_create_hcd(&vhci_hc_driver, &pdev->dev, dev_name(&pdev->dev)); |
04679b34 | 996 | if (!hcd) { |
1a4b6f66 | 997 | pr_err("create hcd failed\n"); |
04679b34 TH |
998 | return -ENOMEM; |
999 | } | |
cee6a262 | 1000 | hcd->has_tt = 1; |
04679b34 TH |
1001 | |
1002 | /* this is private data for vhci_hcd */ | |
1003 | the_controller = hcd_to_vhci(hcd); | |
1004 | ||
1005 | /* | |
1006 | * Finish generic HCD structure initialization and register. | |
1007 | * Call the driver's reset() and start() routines. | |
1008 | */ | |
1009 | ret = usb_add_hcd(hcd, 0, 0); | |
1010 | if (ret != 0) { | |
1a4b6f66 | 1011 | pr_err("usb_add_hcd failed %d\n", ret); |
04679b34 TH |
1012 | usb_put_hcd(hcd); |
1013 | the_controller = NULL; | |
1014 | return ret; | |
1015 | } | |
1016 | ||
b8868e45 | 1017 | usbip_dbg_vhci_hc("bye\n"); |
04679b34 TH |
1018 | return 0; |
1019 | } | |
1020 | ||
04679b34 TH |
1021 | static int vhci_hcd_remove(struct platform_device *pdev) |
1022 | { | |
1023 | struct usb_hcd *hcd; | |
1024 | ||
1025 | hcd = platform_get_drvdata(pdev); | |
1026 | if (!hcd) | |
1027 | return 0; | |
1028 | ||
1029 | /* | |
1030 | * Disconnects the root hub, | |
1031 | * then reverses the effects of usb_add_hcd(), | |
1032 | * invoking the HCD's stop() methods. | |
1033 | */ | |
1034 | usb_remove_hcd(hcd); | |
1035 | usb_put_hcd(hcd); | |
1036 | the_controller = NULL; | |
1037 | ||
04679b34 TH |
1038 | return 0; |
1039 | } | |
1040 | ||
04679b34 TH |
1041 | #ifdef CONFIG_PM |
1042 | ||
1043 | /* what should happen for USB/IP under suspend/resume? */ | |
1044 | static int vhci_hcd_suspend(struct platform_device *pdev, pm_message_t state) | |
1045 | { | |
1046 | struct usb_hcd *hcd; | |
1047 | int rhport = 0; | |
1048 | int connected = 0; | |
1049 | int ret = 0; | |
1050 | ||
04679b34 TH |
1051 | hcd = platform_get_drvdata(pdev); |
1052 | ||
1053 | spin_lock(&the_controller->lock); | |
1054 | ||
1055 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) | |
1056 | if (the_controller->port_status[rhport] & | |
071d1d47 | 1057 | USB_PORT_STAT_CONNECTION) |
04679b34 TH |
1058 | connected += 1; |
1059 | ||
1060 | spin_unlock(&the_controller->lock); | |
1061 | ||
1062 | if (connected > 0) { | |
90ae9d44 | 1063 | dev_info(&pdev->dev, "We have %d active connection%s. Do not suspend.\n", connected, (connected == 1 ? "" : "s")); |
04679b34 TH |
1064 | ret = -EBUSY; |
1065 | } else { | |
1a4b6f66 | 1066 | dev_info(&pdev->dev, "suspend vhci_hcd"); |
04679b34 TH |
1067 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
1068 | } | |
1069 | ||
1070 | return ret; | |
1071 | } | |
1072 | ||
1073 | static int vhci_hcd_resume(struct platform_device *pdev) | |
1074 | { | |
1075 | struct usb_hcd *hcd; | |
1076 | ||
1077 | dev_dbg(&pdev->dev, "%s\n", __func__); | |
1078 | ||
1079 | hcd = platform_get_drvdata(pdev); | |
1080 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
1081 | usb_hcd_poll_rh_status(hcd); | |
1082 | ||
1083 | return 0; | |
1084 | } | |
1085 | ||
1086 | #else | |
1087 | ||
1088 | #define vhci_hcd_suspend NULL | |
1089 | #define vhci_hcd_resume NULL | |
1090 | ||
1091 | #endif | |
1092 | ||
04679b34 TH |
1093 | static struct platform_driver vhci_driver = { |
1094 | .probe = vhci_hcd_probe, | |
f307da94 | 1095 | .remove = vhci_hcd_remove, |
04679b34 TH |
1096 | .suspend = vhci_hcd_suspend, |
1097 | .resume = vhci_hcd_resume, | |
1098 | .driver = { | |
1c126bc6 | 1099 | .name = driver_name, |
04679b34 TH |
1100 | .owner = THIS_MODULE, |
1101 | }, | |
1102 | }; | |
1103 | ||
04679b34 TH |
1104 | /* |
1105 | * The VHCI 'device' is 'virtual'; not a real plug&play hardware. | |
1106 | * We need to add this virtual device as a platform device arbitrarily: | |
1107 | * 1. platform_device_register() | |
1108 | */ | |
1109 | static void the_pdev_release(struct device *dev) | |
1110 | { | |
1111 | return; | |
1112 | } | |
1113 | ||
1114 | static struct platform_device the_pdev = { | |
1115 | /* should be the same name as driver_name */ | |
6fafecb9 | 1116 | .name = driver_name, |
04679b34 TH |
1117 | .id = -1, |
1118 | .dev = { | |
04679b34 TH |
1119 | .release = the_pdev_release, |
1120 | }, | |
1121 | }; | |
1122 | ||
0392bbb6 | 1123 | static int __init vhci_hcd_init(void) |
04679b34 TH |
1124 | { |
1125 | int ret; | |
1126 | ||
04679b34 TH |
1127 | if (usb_disabled()) |
1128 | return -ENODEV; | |
1129 | ||
04679b34 | 1130 | ret = platform_driver_register(&vhci_driver); |
4d421950 | 1131 | if (ret) |
04679b34 TH |
1132 | goto err_driver_register; |
1133 | ||
1134 | ret = platform_device_register(&the_pdev); | |
4d421950 | 1135 | if (ret) |
04679b34 TH |
1136 | goto err_platform_device_register; |
1137 | ||
1a4b6f66 | 1138 | pr_info(DRIVER_DESC " v" USBIP_VERSION "\n"); |
04679b34 TH |
1139 | return ret; |
1140 | ||
04679b34 TH |
1141 | err_platform_device_register: |
1142 | platform_driver_unregister(&vhci_driver); | |
04679b34 | 1143 | err_driver_register: |
04679b34 TH |
1144 | return ret; |
1145 | } | |
04679b34 | 1146 | |
0392bbb6 | 1147 | static void __exit vhci_hcd_exit(void) |
04679b34 | 1148 | { |
04679b34 TH |
1149 | platform_device_unregister(&the_pdev); |
1150 | platform_driver_unregister(&vhci_driver); | |
04679b34 | 1151 | } |
071d1d47 | 1152 | |
0392bbb6 | 1153 | module_init(vhci_hcd_init); |
1154 | module_exit(vhci_hcd_exit); | |
071d1d47 | 1155 | |
1156 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
1157 | MODULE_DESCRIPTION(DRIVER_DESC); | |
4ce0a41f | 1158 | MODULE_LICENSE("GPL"); |
6973c6f2 | 1159 | MODULE_VERSION(USBIP_VERSION); |