blob: 0585078638db7ebcf72a40fc9f9ecdf3ea362512 [file] [log] [blame]
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001/*
2 * Copyright (C) 2003-2008 Takahiro Hirofuchi
Nobuo Iwata0775a9c2016-06-13 11:33:40 +09003 * Copyright (C) 2015-2016 Nobuo Iwata
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06004 *
5 * This is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
18 * USA.
19 */
20
matt mooney7aaacb42011-05-11 22:33:43 -070021#include <linux/init.h>
Bernard Blackham3d0a2a22012-10-22 06:45:00 +110022#include <linux/file.h>
matt mooney7aaacb42011-05-11 22:33:43 -070023#include <linux/kernel.h>
Arnd Bergmann9720b4b2011-03-02 00:13:05 +010024#include <linux/kthread.h>
matt mooney7aaacb42011-05-11 22:33:43 -070025#include <linux/module.h>
26#include <linux/platform_device.h>
27#include <linux/slab.h>
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -060028
29#include "usbip_common.h"
30#include "vhci.h"
31
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -060032#define DRIVER_AUTHOR "Takahiro Hirofuchi"
matt mooney64e62422011-05-11 22:33:44 -070033#define DRIVER_DESC "USB/IP 'Virtual' Host Controller (VHCI) Driver"
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -060034
35/*
36 * TODO
37 * - update root hub emulation
38 * - move the emulation code to userland ?
39 * porting to other operating systems
40 * minimize kernel code
41 * - add suspend/resume code
42 * - clean up everything
43 */
44
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -060045/* See usb gadget dummy hcd */
46
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -060047static int vhci_hub_status(struct usb_hcd *hcd, char *buff);
48static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
matt mooney071d1d42011-05-06 03:47:50 -070049 u16 wIndex, char *buff, u16 wLength);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -060050static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
matt mooney071d1d42011-05-06 03:47:50 -070051 gfp_t mem_flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -060052static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status);
53static int vhci_start(struct usb_hcd *vhci_hcd);
54static void vhci_stop(struct usb_hcd *hcd);
55static int vhci_get_frame_number(struct usb_hcd *hcd);
56
57static const char driver_name[] = "vhci_hcd";
Robert P. J. Dayf5e08ca72009-11-13 15:13:43 -050058static const char driver_desc[] = "USB/IP Virtual Host Controller";
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -060059
Nobuo Iwata0775a9c2016-06-13 11:33:40 +090060int vhci_num_controllers = VHCI_NR_HCS;
61
62struct platform_device **vhci_pdevs;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -060063
matt mooney071d1d42011-05-06 03:47:50 -070064static const char * const bit_desc[] = {
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -060065 "CONNECTION", /*0*/
66 "ENABLE", /*1*/
67 "SUSPEND", /*2*/
68 "OVER_CURRENT", /*3*/
69 "RESET", /*4*/
matt mooney071d1d42011-05-06 03:47:50 -070070 "R5", /*5*/
71 "R6", /*6*/
72 "R7", /*7*/
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -060073 "POWER", /*8*/
74 "LOWSPEED", /*9*/
75 "HIGHSPEED", /*10*/
76 "PORT_TEST", /*11*/
77 "INDICATOR", /*12*/
matt mooney071d1d42011-05-06 03:47:50 -070078 "R13", /*13*/
79 "R14", /*14*/
80 "R15", /*15*/
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -060081 "C_CONNECTION", /*16*/
82 "C_ENABLE", /*17*/
83 "C_SUSPEND", /*18*/
84 "C_OVER_CURRENT", /*19*/
85 "C_RESET", /*20*/
matt mooney071d1d42011-05-06 03:47:50 -070086 "R21", /*21*/
87 "R22", /*22*/
88 "R23", /*23*/
89 "R24", /*24*/
90 "R25", /*25*/
91 "R26", /*26*/
92 "R27", /*27*/
93 "R28", /*28*/
94 "R29", /*29*/
95 "R30", /*30*/
96 "R31", /*31*/
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -060097};
98
Márton Németh4a3ca2b2011-06-14 08:28:26 +020099static void dump_port_status_diff(u32 prev_status, u32 new_status)
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600100{
101 int i = 0;
Márton Németh4a3ca2b2011-06-14 08:28:26 +0200102 u32 bit = 1;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600103
Márton Németh4a3ca2b2011-06-14 08:28:26 +0200104 pr_debug("status prev -> new: %08x -> %08x\n", prev_status, new_status);
105 while (bit) {
106 u32 prev = prev_status & bit;
107 u32 new = new_status & bit;
108 char change;
109
110 if (!prev && new)
111 change = '+';
112 else if (prev && !new)
113 change = '-';
114 else
115 change = ' ';
116
117 if (prev || new)
118 pr_debug(" %c%s\n", change, bit_desc[i]);
119 bit <<= 1;
120 i++;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600121 }
matt mooney1a4b6f62011-05-19 16:47:32 -0700122 pr_debug("\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600123}
124
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900125void rh_port_connect(struct vhci_device *vdev, enum usb_device_speed speed)
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600126{
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900127 struct vhci_hcd *vhci = vdev_to_vhci(vdev);
128 int rhport = vdev->rhport;
129 u32 status;
Andrew Goodbody21619792016-02-02 17:36:39 +0000130 unsigned long flags;
131
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600132 usbip_dbg_vhci_rh("rh_port_connect %d\n", rhport);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600133
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900134 spin_lock_irqsave(&vhci->lock, flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600135
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900136 status = vhci->port_status[rhport];
137
138 status |= USB_PORT_STAT_CONNECTION | (1 << USB_PORT_FEAT_C_CONNECTION);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600139
140 switch (speed) {
141 case USB_SPEED_HIGH:
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900142 status |= USB_PORT_STAT_HIGH_SPEED;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600143 break;
144 case USB_SPEED_LOW:
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900145 status |= USB_PORT_STAT_LOW_SPEED;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600146 break;
147 default:
148 break;
149 }
150
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900151 vhci->port_status[rhport] = status;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600152
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900153 spin_unlock_irqrestore(&vhci->lock, flags);
154
155 usb_hcd_poll_rh_status(vhci_to_hcd(vhci));
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600156}
157
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900158static void rh_port_disconnect(struct vhci_device *vdev)
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600159{
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900160 struct vhci_hcd *vhci = vdev_to_vhci(vdev);
161 int rhport = vdev->rhport;
162 u32 status;
Andrew Goodbody21619792016-02-02 17:36:39 +0000163 unsigned long flags;
164
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600165 usbip_dbg_vhci_rh("rh_port_disconnect %d\n", rhport);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600166
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900167 spin_lock_irqsave(&vhci->lock, flags);
Bart Westgeestc7f00892012-10-10 13:34:27 -0400168
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900169 status = vhci->port_status[rhport];
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600170
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900171 status &= ~USB_PORT_STAT_CONNECTION;
172 status |= (1 << USB_PORT_FEAT_C_CONNECTION);
173
174 vhci->port_status[rhport] = status;
175
176 spin_unlock_irqrestore(&vhci->lock, flags);
177 usb_hcd_poll_rh_status(vhci_to_hcd(vhci));
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600178}
179
matt mooney071d1d42011-05-06 03:47:50 -0700180#define PORT_C_MASK \
181 ((USB_PORT_STAT_C_CONNECTION \
182 | USB_PORT_STAT_C_ENABLE \
183 | USB_PORT_STAT_C_SUSPEND \
184 | USB_PORT_STAT_C_OVERCURRENT \
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600185 | USB_PORT_STAT_C_RESET) << 16)
186
187/*
Bart Westgeest74893012012-06-13 15:37:18 -0400188 * Returns 0 if the status hasn't changed, or the number of bytes in buf.
189 * Ports are 0-indexed from the HCD point of view,
190 * and 1-indexed from the USB core pointer of view.
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600191 *
192 * @buf: a bitmap to show which port status has been changed.
Bart Westgeest74893012012-06-13 15:37:18 -0400193 * bit 0: reserved
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600194 * bit 1: the status of port 0 has been changed.
195 * bit 2: the status of port 1 has been changed.
196 * ...
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600197 */
198static int vhci_hub_status(struct usb_hcd *hcd, char *buf)
199{
200 struct vhci_hcd *vhci;
Bart Westgeest74893012012-06-13 15:37:18 -0400201 int retval;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600202 int rhport;
203 int changed = 0;
Andrew Goodbody21619792016-02-02 17:36:39 +0000204 unsigned long flags;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600205
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900206 retval = DIV_ROUND_UP(VHCI_HC_PORTS + 1, 8);
Bart Westgeest74893012012-06-13 15:37:18 -0400207 memset(buf, 0, retval);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600208
209 vhci = hcd_to_vhci(hcd);
210
Andrew Goodbody21619792016-02-02 17:36:39 +0000211 spin_lock_irqsave(&vhci->lock, flags);
Alan Stern541c7d42010-06-22 16:39:10 -0400212 if (!HCD_HW_ACCESSIBLE(hcd)) {
Bart Westgeest74893012012-06-13 15:37:18 -0400213 usbip_dbg_vhci_rh("hw accessible flag not on?\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600214 goto done;
215 }
216
217 /* check pseudo status register for each port */
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900218 for (rhport = 0; rhport < VHCI_HC_PORTS; rhport++) {
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600219 if ((vhci->port_status[rhport] & PORT_C_MASK)) {
220 /* The status of a port has been changed, */
Bart Westgeest74893012012-06-13 15:37:18 -0400221 usbip_dbg_vhci_rh("port %d status changed\n", rhport);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600222
Bart Westgeest74893012012-06-13 15:37:18 -0400223 buf[(rhport + 1) / 8] |= 1 << (rhport + 1) % 8;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600224 changed = 1;
225 }
226 }
227
navin patidar107f04b2012-09-06 16:49:50 +0530228 if ((hcd->state == HC_STATE_SUSPENDED) && (changed == 1))
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600229 usb_hcd_resume_root_hub(hcd);
230
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600231done:
Andrew Goodbody21619792016-02-02 17:36:39 +0000232 spin_unlock_irqrestore(&vhci->lock, flags);
Bart Westgeest74893012012-06-13 15:37:18 -0400233 return changed ? retval : 0;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600234}
235
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600236static inline void hub_descriptor(struct usb_hub_descriptor *desc)
237{
Johan Hovoldec963b42017-05-10 18:18:26 +0200238 int width;
239
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600240 memset(desc, 0, sizeof(*desc));
Sergei Shtylyov8f413d82015-03-29 01:45:02 +0300241 desc->bDescriptorType = USB_DT_HUB;
Vaishali Thakkar0c596332015-08-19 10:47:46 +0530242 desc->wHubCharacteristics = cpu_to_le16(
Sergei Shtylyov1cc9af82015-01-19 02:00:56 +0300243 HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_COMMON_OCPM);
Johan Hovoldec963b42017-05-10 18:18:26 +0200244
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900245 desc->bNbrPorts = VHCI_HC_PORTS;
Johan Hovoldec963b42017-05-10 18:18:26 +0200246 BUILD_BUG_ON(VHCI_HC_PORTS > USB_MAXCHILDREN);
247 width = desc->bNbrPorts / 8 + 1;
248 desc->bDescLength = USB_DT_HUB_NONVAR_SIZE + 2 * width;
249 memset(&desc->u.hs.DeviceRemovable[0], 0, width);
250 memset(&desc->u.hs.DeviceRemovable[width], 0xff, width);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600251}
252
253static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
254 u16 wIndex, char *buf, u16 wLength)
255{
256 struct vhci_hcd *dum;
257 int retval = 0;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600258 int rhport;
Andrew Goodbody21619792016-02-02 17:36:39 +0000259 unsigned long flags;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600260
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900261 u32 prev_port_status[VHCI_HC_PORTS];
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600262
Alan Stern541c7d42010-06-22 16:39:10 -0400263 if (!HCD_HW_ACCESSIBLE(hcd))
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600264 return -ETIMEDOUT;
265
266 /*
267 * NOTE:
268 * wIndex shows the port number and begins from 1.
269 */
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600270 usbip_dbg_vhci_rh("typeReq %x wValue %x wIndex %x\n", typeReq, wValue,
matt mooney071d1d42011-05-06 03:47:50 -0700271 wIndex);
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900272 if (wIndex > VHCI_HC_PORTS)
matt mooney1a4b6f62011-05-19 16:47:32 -0700273 pr_err("invalid port number %d\n", wIndex);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600274 rhport = ((__u8)(wIndex & 0x00ff)) - 1;
275
276 dum = hcd_to_vhci(hcd);
277
Andrew Goodbody21619792016-02-02 17:36:39 +0000278 spin_lock_irqsave(&dum->lock, flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600279
280 /* store old status and compare now and old later */
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600281 if (usbip_dbg_flag_vhci_rh) {
Márton Németh6f480bf2011-06-13 23:30:09 +0200282 memcpy(prev_port_status, dum->port_status,
283 sizeof(prev_port_status));
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600284 }
285
286 switch (typeReq) {
287 case ClearHubFeature:
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600288 usbip_dbg_vhci_rh(" ClearHubFeature\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600289 break;
290 case ClearPortFeature:
291 switch (wValue) {
292 case USB_PORT_FEAT_SUSPEND:
293 if (dum->port_status[rhport] & USB_PORT_STAT_SUSPEND) {
294 /* 20msec signaling */
295 dum->resuming = 1;
296 dum->re_timeout =
297 jiffies + msecs_to_jiffies(20);
298 }
299 break;
300 case USB_PORT_FEAT_POWER:
Cédric Cabessa7923a652014-03-19 23:04:57 +0100301 usbip_dbg_vhci_rh(
302 " ClearPortFeature: USB_PORT_FEAT_POWER\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600303 dum->port_status[rhport] = 0;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600304 dum->resuming = 0;
305 break;
306 case USB_PORT_FEAT_C_RESET:
Cédric Cabessa7923a652014-03-19 23:04:57 +0100307 usbip_dbg_vhci_rh(
308 " ClearPortFeature: USB_PORT_FEAT_C_RESET\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600309 switch (dum->vdev[rhport].speed) {
310 case USB_SPEED_HIGH:
311 dum->port_status[rhport] |=
matt mooney071d1d42011-05-06 03:47:50 -0700312 USB_PORT_STAT_HIGH_SPEED;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600313 break;
314 case USB_SPEED_LOW:
315 dum->port_status[rhport] |=
matt mooney071d1d42011-05-06 03:47:50 -0700316 USB_PORT_STAT_LOW_SPEED;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600317 break;
318 default:
319 break;
320 }
Gustavo A. R. Silva7c92e5f2017-02-09 01:49:56 -0600321 break;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600322 default:
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600323 usbip_dbg_vhci_rh(" ClearPortFeature: default %x\n",
matt mooney071d1d42011-05-06 03:47:50 -0700324 wValue);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600325 dum->port_status[rhport] &= ~(1 << wValue);
matt mooney49aecef2011-05-06 03:47:54 -0700326 break;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600327 }
328 break;
329 case GetHubDescriptor:
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600330 usbip_dbg_vhci_rh(" GetHubDescriptor\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600331 hub_descriptor((struct usb_hub_descriptor *) buf);
332 break;
333 case GetHubStatus:
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600334 usbip_dbg_vhci_rh(" GetHubStatus\n");
Alexey Tuliaa06a24d2014-06-13 11:35:13 +0300335 *(__le32 *) buf = cpu_to_le32(0);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600336 break;
337 case GetPortStatus:
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600338 usbip_dbg_vhci_rh(" GetPortStatus port %x\n", wIndex);
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900339 if (wIndex > VHCI_HC_PORTS || wIndex < 1) {
matt mooney1a4b6f62011-05-19 16:47:32 -0700340 pr_err("invalid port number %d\n", wIndex);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600341 retval = -EPIPE;
342 }
343
Bart Westgeestc7f00892012-10-10 13:34:27 -0400344 /* we do not care about resume. */
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600345
346 /* whoever resets or resumes must GetPortStatus to
347 * complete it!!
Bart Westgeestc7f00892012-10-10 13:34:27 -0400348 */
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600349 if (dum->resuming && time_after(jiffies, dum->re_timeout)) {
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600350 dum->port_status[rhport] |=
matt mooney87352762011-05-19 21:36:56 -0700351 (1 << USB_PORT_FEAT_C_SUSPEND);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600352 dum->port_status[rhport] &=
matt mooney87352762011-05-19 21:36:56 -0700353 ~(1 << USB_PORT_FEAT_SUSPEND);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600354 dum->resuming = 0;
355 dum->re_timeout = 0;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600356 }
357
358 if ((dum->port_status[rhport] & (1 << USB_PORT_FEAT_RESET)) !=
matt mooney071d1d42011-05-06 03:47:50 -0700359 0 && time_after(jiffies, dum->re_timeout)) {
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600360 dum->port_status[rhport] |=
matt mooney071d1d42011-05-06 03:47:50 -0700361 (1 << USB_PORT_FEAT_C_RESET);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600362 dum->port_status[rhport] &=
matt mooney071d1d42011-05-06 03:47:50 -0700363 ~(1 << USB_PORT_FEAT_RESET);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600364 dum->re_timeout = 0;
365
366 if (dum->vdev[rhport].ud.status ==
matt mooney071d1d42011-05-06 03:47:50 -0700367 VDEV_ST_NOTASSIGNED) {
Cédric Cabessa7923a652014-03-19 23:04:57 +0100368 usbip_dbg_vhci_rh(
369 " enable rhport %d (status %u)\n",
370 rhport,
371 dum->vdev[rhport].ud.status);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600372 dum->port_status[rhport] |=
matt mooney071d1d42011-05-06 03:47:50 -0700373 USB_PORT_STAT_ENABLE;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600374 }
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600375 }
Teodora Balutad0306a52013-11-04 13:12:12 +0200376 ((__le16 *) buf)[0] = cpu_to_le16(dum->port_status[rhport]);
Cédric Cabessa7923a652014-03-19 23:04:57 +0100377 ((__le16 *) buf)[1] =
378 cpu_to_le16(dum->port_status[rhport] >> 16);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600379
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600380 usbip_dbg_vhci_rh(" GetPortStatus bye %x %x\n", ((u16 *)buf)[0],
matt mooney071d1d42011-05-06 03:47:50 -0700381 ((u16 *)buf)[1]);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600382 break;
383 case SetHubFeature:
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600384 usbip_dbg_vhci_rh(" SetHubFeature\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600385 retval = -EPIPE;
386 break;
387 case SetPortFeature:
388 switch (wValue) {
389 case USB_PORT_FEAT_SUSPEND:
Cédric Cabessa7923a652014-03-19 23:04:57 +0100390 usbip_dbg_vhci_rh(
391 " SetPortFeature: USB_PORT_FEAT_SUSPEND\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600392 break;
393 case USB_PORT_FEAT_RESET:
Cédric Cabessa7923a652014-03-19 23:04:57 +0100394 usbip_dbg_vhci_rh(
395 " SetPortFeature: USB_PORT_FEAT_RESET\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600396 /* if it's already running, disconnect first */
397 if (dum->port_status[rhport] & USB_PORT_STAT_ENABLE) {
398 dum->port_status[rhport] &=
matt mooney071d1d42011-05-06 03:47:50 -0700399 ~(USB_PORT_STAT_ENABLE |
400 USB_PORT_STAT_LOW_SPEED |
401 USB_PORT_STAT_HIGH_SPEED);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600402 /* FIXME test that code path! */
403 }
404 /* 50msec reset signaling */
405 dum->re_timeout = jiffies + msecs_to_jiffies(50);
406
407 /* FALLTHROUGH */
408 default:
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600409 usbip_dbg_vhci_rh(" SetPortFeature: default %d\n",
matt mooney071d1d42011-05-06 03:47:50 -0700410 wValue);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600411 dum->port_status[rhport] |= (1 << wValue);
matt mooney49aecef2011-05-06 03:47:54 -0700412 break;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600413 }
414 break;
415
416 default:
matt mooney1a4b6f62011-05-19 16:47:32 -0700417 pr_err("default: no such request\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600418
419 /* "protocol stall" on error */
420 retval = -EPIPE;
421 }
422
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600423 if (usbip_dbg_flag_vhci_rh) {
matt mooney1a4b6f62011-05-19 16:47:32 -0700424 pr_debug("port %d\n", rhport);
Márton Némethbfb4ce22011-06-13 23:47:39 +0200425 /* Only dump valid port status */
426 if (rhport >= 0) {
Márton Németh4a3ca2b2011-06-14 08:28:26 +0200427 dump_port_status_diff(prev_port_status[rhport],
428 dum->port_status[rhport]);
Márton Némethbfb4ce22011-06-13 23:47:39 +0200429 }
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600430 }
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600431 usbip_dbg_vhci_rh(" bye\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600432
Andrew Goodbody21619792016-02-02 17:36:39 +0000433 spin_unlock_irqrestore(&dum->lock, flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600434
435 return retval;
436}
437
Yuyang Du4eebed92017-04-06 06:03:22 +0800438static void vhci_tx_urb(struct urb *urb, struct vhci_device *vdev)
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600439{
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600440 struct vhci_priv *priv;
Nobuo Iwatad79cda02016-10-13 12:49:02 +0900441 struct vhci_hcd *vhci;
Andrew Goodbody21619792016-02-02 17:36:39 +0000442 unsigned long flags;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600443
444 if (!vdev) {
matt mooney1a4b6f62011-05-19 16:47:32 -0700445 pr_err("could not get virtual device");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600446 return;
447 }
Nobuo Iwatad79cda02016-10-13 12:49:02 +0900448 vhci = vdev_to_vhci(vdev);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600449
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600450 priv = kzalloc(sizeof(struct vhci_priv), GFP_ATOMIC);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600451 if (!priv) {
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600452 usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC);
453 return;
454 }
455
Andrew Goodbody21619792016-02-02 17:36:39 +0000456 spin_lock_irqsave(&vdev->priv_lock, flags);
Joe Perches78110bb2013-02-11 09:41:29 -0800457
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900458 priv->seqnum = atomic_inc_return(&vhci->seqnum);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600459 if (priv->seqnum == 0xffff)
matt mooney1a4b6f62011-05-19 16:47:32 -0700460 dev_info(&urb->dev->dev, "seqnum max\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600461
462 priv->vdev = vdev;
463 priv->urb = urb;
464
465 urb->hcpriv = (void *) priv;
466
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600467 list_add_tail(&priv->list, &vdev->priv_tx);
468
469 wake_up(&vdev->waitq_tx);
Andrew Goodbody21619792016-02-02 17:36:39 +0000470 spin_unlock_irqrestore(&vdev->priv_lock, flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600471}
472
473static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
474 gfp_t mem_flags)
475{
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900476 struct vhci_hcd *vhci = hcd_to_vhci(hcd);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600477 struct device *dev = &urb->dev->dev;
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900478 u8 portnum = urb->dev->portnum;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600479 int ret = 0;
Max Vozeler6d212152011-01-12 15:02:02 +0200480 struct vhci_device *vdev;
Andrew Goodbody21619792016-02-02 17:36:39 +0000481 unsigned long flags;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600482
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600483 usbip_dbg_vhci_hc("enter, usb_hcd %p urb %p mem_flags %d\n",
matt mooney071d1d42011-05-06 03:47:50 -0700484 hcd, urb, mem_flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600485
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900486 if (portnum > VHCI_HC_PORTS) {
487 pr_err("invalid port number %d\n", portnum);
488 return -ENODEV;
489 }
490 vdev = &vhci->vdev[portnum-1];
491
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600492 /* patch to usb_sg_init() is in 2.5.60 */
493 BUG_ON(!urb->transfer_buffer && urb->transfer_buffer_length);
494
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900495 spin_lock_irqsave(&vhci->lock, flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600496
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600497 if (urb->status != -EINPROGRESS) {
498 dev_err(dev, "URB already unlinked!, status %d\n", urb->status);
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900499 spin_unlock_irqrestore(&vhci->lock, flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600500 return urb->status;
501 }
502
Max Vozeler6d212152011-01-12 15:02:02 +0200503 /* refuse enqueue for dead connection */
504 spin_lock(&vdev->ud.lock);
matt mooney071d1d42011-05-06 03:47:50 -0700505 if (vdev->ud.status == VDEV_ST_NULL ||
506 vdev->ud.status == VDEV_ST_ERROR) {
matt mooney1a4b6f62011-05-19 16:47:32 -0700507 dev_err(dev, "enqueue for inactive port %d\n", vdev->rhport);
Max Vozeler6d212152011-01-12 15:02:02 +0200508 spin_unlock(&vdev->ud.lock);
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900509 spin_unlock_irqrestore(&vhci->lock, flags);
Max Vozeler6d212152011-01-12 15:02:02 +0200510 return -ENODEV;
511 }
512 spin_unlock(&vdev->ud.lock);
513
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600514 ret = usb_hcd_link_urb_to_ep(hcd, urb);
515 if (ret)
516 goto no_need_unlink;
517
518 /*
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600519 * The enumeration process is as follows;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600520 *
521 * 1. Get_Descriptor request to DevAddrs(0) EndPoint(0)
522 * to get max packet length of default pipe
523 *
524 * 2. Set_Address request to DevAddr(0) EndPoint(0)
525 *
526 */
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600527 if (usb_pipedevice(urb->pipe) == 0) {
528 __u8 type = usb_pipetype(urb->pipe);
529 struct usb_ctrlrequest *ctrlreq =
matt mooney071d1d42011-05-06 03:47:50 -0700530 (struct usb_ctrlrequest *) urb->setup_packet;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600531
532 if (type != PIPE_CONTROL || !ctrlreq) {
533 dev_err(dev, "invalid request to devnum 0\n");
Shan Weia7cd5822009-07-24 16:57:35 +0800534 ret = -EINVAL;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600535 goto no_need_xmit;
536 }
537
538 switch (ctrlreq->bRequest) {
539 case USB_REQ_SET_ADDRESS:
540 /* set_address may come when a device is reset */
541 dev_info(dev, "SetAddress Request (%d) to port %d\n",
542 ctrlreq->wValue, vdev->rhport);
543
Markus Elfring03f3df82014-11-21 16:33:18 +0100544 usb_put_dev(vdev->udev);
Max Vozeler7606ee82011-01-12 15:02:00 +0200545 vdev->udev = usb_get_dev(urb->dev);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600546
547 spin_lock(&vdev->ud.lock);
548 vdev->ud.status = VDEV_ST_USED;
549 spin_unlock(&vdev->ud.lock);
550
551 if (urb->status == -EINPROGRESS) {
552 /* This request is successfully completed. */
553 /* If not -EINPROGRESS, possibly unlinked. */
554 urb->status = 0;
555 }
556
557 goto no_need_xmit;
558
559 case USB_REQ_GET_DESCRIPTOR:
Teodora Balutad0306a52013-11-04 13:12:12 +0200560 if (ctrlreq->wValue == cpu_to_le16(USB_DT_DEVICE << 8))
Cédric Cabessa7923a652014-03-19 23:04:57 +0100561 usbip_dbg_vhci_hc(
562 "Not yet?:Get_Descriptor to device 0 (get max pipe size)\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600563
Markus Elfring03f3df82014-11-21 16:33:18 +0100564 usb_put_dev(vdev->udev);
Max Vozeler7606ee82011-01-12 15:02:00 +0200565 vdev->udev = usb_get_dev(urb->dev);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600566 goto out;
567
568 default:
569 /* NOT REACHED */
Cédric Cabessa7923a652014-03-19 23:04:57 +0100570 dev_err(dev,
571 "invalid request to devnum 0 bRequest %u, wValue %u\n",
572 ctrlreq->bRequest,
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600573 ctrlreq->wValue);
574 ret = -EINVAL;
575 goto no_need_xmit;
576 }
577
578 }
579
580out:
Yuyang Du4eebed92017-04-06 06:03:22 +0800581 vhci_tx_urb(urb, vdev);
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900582 spin_unlock_irqrestore(&vhci->lock, flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600583
584 return 0;
585
586no_need_xmit:
587 usb_hcd_unlink_urb_from_ep(hcd, urb);
588no_need_unlink:
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900589 spin_unlock_irqrestore(&vhci->lock, flags);
Igor Kotrasinski03b0a522015-09-21 11:30:44 +0200590 if (!ret)
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900591 usb_hcd_giveback_urb(hcd, urb, urb->status);
Shan Weia7cd5822009-07-24 16:57:35 +0800592 return ret;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600593}
594
595/*
596 * vhci_rx gives back the urb after receiving the reply of the urb. If an
597 * unlink pdu is sent or not, vhci_rx receives a normal return pdu and gives
598 * back its urb. For the driver unlinking the urb, the content of the urb is
599 * not important, but the calling to its completion handler is important; the
600 * completion of unlinking is notified by the completion handler.
601 *
602 *
603 * CLIENT SIDE
604 *
605 * - When vhci_hcd receives RET_SUBMIT,
606 *
607 * - case 1a). the urb of the pdu is not unlinking.
608 * - normal case
609 * => just give back the urb
610 *
611 * - case 1b). the urb of the pdu is unlinking.
612 * - usbip.ko will return a reply of the unlinking request.
613 * => give back the urb now and go to case 2b).
614 *
615 * - When vhci_hcd receives RET_UNLINK,
616 *
617 * - case 2a). a submit request is still pending in vhci_hcd.
618 * - urb was really pending in usbip.ko and urb_unlink_urb() was
619 * completed there.
620 * => free a pending submit request
621 * => notify unlink completeness by giving back the urb
622 *
623 * - case 2b). a submit request is *not* pending in vhci_hcd.
624 * - urb was already given back to the core driver.
625 * => do not give back the urb
626 *
627 *
628 * SERVER SIDE
629 *
630 * - When usbip receives CMD_UNLINK,
631 *
632 * - case 3a). the urb of the unlink request is now in submission.
633 * => do usb_unlink_urb().
634 * => after the unlink is completed, send RET_UNLINK.
635 *
636 * - case 3b). the urb of the unlink request is not in submission.
637 * - may be already completed or never be received
638 * => send RET_UNLINK
639 *
640 */
641static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
642{
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900643 struct vhci_hcd *vhci = hcd_to_vhci(hcd);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600644 struct vhci_priv *priv;
645 struct vhci_device *vdev;
Andrew Goodbody21619792016-02-02 17:36:39 +0000646 unsigned long flags;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600647
matt mooney1a4b6f62011-05-19 16:47:32 -0700648 pr_info("dequeue a urb %p\n", urb);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600649
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900650 spin_lock_irqsave(&vhci->lock, flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600651
652 priv = urb->hcpriv;
653 if (!priv) {
654 /* URB was never linked! or will be soon given back by
655 * vhci_rx. */
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900656 spin_unlock_irqrestore(&vhci->lock, flags);
Igor Kotrasinski635e6642015-09-21 11:30:45 +0200657 return -EIDRM;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600658 }
659
660 {
661 int ret = 0;
Pawel Lebioda3eed8c02014-05-14 19:20:27 +0200662
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600663 ret = usb_hcd_check_unlink_urb(hcd, urb, status);
664 if (ret) {
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900665 spin_unlock_irqrestore(&vhci->lock, flags);
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600666 return ret;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600667 }
668 }
669
670 /* send unlink request here? */
671 vdev = priv->vdev;
672
673 if (!vdev->ud.tcp_socket) {
674 /* tcp connection is closed */
Harvey Yang50b66b52013-01-22 13:31:31 +0800675 spin_lock(&vdev->priv_lock);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600676
matt mooney1a4b6f62011-05-19 16:47:32 -0700677 pr_info("device %p seems to be disconnected\n", vdev);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600678 list_del(&priv->list);
679 kfree(priv);
680 urb->hcpriv = NULL;
681
Harvey Yang50b66b52013-01-22 13:31:31 +0800682 spin_unlock(&vdev->priv_lock);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600683
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600684 /*
685 * If tcp connection is alive, we have sent CMD_UNLINK.
686 * vhci_rx will receive RET_UNLINK and give back the URB.
687 * Otherwise, we give back it here.
688 */
matt mooney1a4b6f62011-05-19 16:47:32 -0700689 pr_info("gives back urb %p\n", urb);
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600690
691 usb_hcd_unlink_urb_from_ep(hcd, urb);
692
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900693 spin_unlock_irqrestore(&vhci->lock, flags);
694 usb_hcd_giveback_urb(vhci_to_hcd(vhci), urb, urb->status);
695 spin_lock_irqsave(&vhci->lock, flags);
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600696
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600697 } else {
698 /* tcp connection is alive */
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600699 struct vhci_unlink *unlink;
700
Harvey Yang50b66b52013-01-22 13:31:31 +0800701 spin_lock(&vdev->priv_lock);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600702
703 /* setup CMD_UNLINK pdu */
704 unlink = kzalloc(sizeof(struct vhci_unlink), GFP_ATOMIC);
705 if (!unlink) {
Harvey Yang50b66b52013-01-22 13:31:31 +0800706 spin_unlock(&vdev->priv_lock);
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900707 spin_unlock_irqrestore(&vhci->lock, flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600708 usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC);
709 return -ENOMEM;
710 }
711
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900712 unlink->seqnum = atomic_inc_return(&vhci->seqnum);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600713 if (unlink->seqnum == 0xffff)
matt mooney1a4b6f62011-05-19 16:47:32 -0700714 pr_info("seqnum max\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600715
716 unlink->unlink_seqnum = priv->seqnum;
717
matt mooney1a4b6f62011-05-19 16:47:32 -0700718 pr_info("device %p seems to be still connected\n", vdev);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600719
720 /* send cmd_unlink and try to cancel the pending URB in the
721 * peer */
722 list_add_tail(&unlink->list, &vdev->unlink_tx);
723 wake_up(&vdev->waitq_tx);
724
Harvey Yang50b66b52013-01-22 13:31:31 +0800725 spin_unlock(&vdev->priv_lock);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600726 }
727
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900728 spin_unlock_irqrestore(&vhci->lock, flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600729
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600730 usbip_dbg_vhci_hc("leave\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600731 return 0;
732}
733
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600734static void vhci_device_unlink_cleanup(struct vhci_device *vdev)
735{
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900736 struct vhci_hcd *vhci = vdev_to_vhci(vdev);
737 struct usb_hcd *hcd = vhci_to_hcd(vhci);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600738 struct vhci_unlink *unlink, *tmp;
Andrew Goodbody21619792016-02-02 17:36:39 +0000739 unsigned long flags;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600740
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900741 spin_lock_irqsave(&vhci->lock, flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600742 spin_lock(&vdev->priv_lock);
743
744 list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) {
matt mooney1a4b6f62011-05-19 16:47:32 -0700745 pr_info("unlink cleanup tx %lu\n", unlink->unlink_seqnum);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600746 list_del(&unlink->list);
747 kfree(unlink);
748 }
749
Bernard Blackham236742d2012-09-06 20:25:04 +1000750 while (!list_empty(&vdev->unlink_rx)) {
Max Vozelerb92a5e22011-01-12 15:02:01 +0200751 struct urb *urb;
752
Bernard Blackham236742d2012-09-06 20:25:04 +1000753 unlink = list_first_entry(&vdev->unlink_rx, struct vhci_unlink,
754 list);
755
Max Vozelerb92a5e22011-01-12 15:02:01 +0200756 /* give back URB of unanswered unlink request */
matt mooney1a4b6f62011-05-19 16:47:32 -0700757 pr_info("unlink cleanup rx %lu\n", unlink->unlink_seqnum);
Max Vozelerb92a5e22011-01-12 15:02:01 +0200758
759 urb = pickup_urb_and_free_priv(vdev, unlink->unlink_seqnum);
760 if (!urb) {
matt mooney1a4b6f62011-05-19 16:47:32 -0700761 pr_info("the urb (seqnum %lu) was already given back\n",
762 unlink->unlink_seqnum);
Max Vozelerb92a5e22011-01-12 15:02:01 +0200763 list_del(&unlink->list);
764 kfree(unlink);
765 continue;
766 }
767
768 urb->status = -ENODEV;
769
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900770 usb_hcd_unlink_urb_from_ep(hcd, urb);
Bernard Blackham236742d2012-09-06 20:25:04 +1000771
772 list_del(&unlink->list);
773
774 spin_unlock(&vdev->priv_lock);
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900775 spin_unlock_irqrestore(&vhci->lock, flags);
Max Vozelerb92a5e22011-01-12 15:02:01 +0200776
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900777 usb_hcd_giveback_urb(hcd, urb, urb->status);
Max Vozelerb92a5e22011-01-12 15:02:01 +0200778
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900779 spin_lock_irqsave(&vhci->lock, flags);
Bernard Blackham236742d2012-09-06 20:25:04 +1000780 spin_lock(&vdev->priv_lock);
781
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600782 kfree(unlink);
783 }
784
785 spin_unlock(&vdev->priv_lock);
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900786 spin_unlock_irqrestore(&vhci->lock, flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600787}
788
789/*
790 * The important thing is that only one context begins cleanup.
791 * This is why error handling and cleanup become simple.
792 * We do not want to consider race condition as possible.
793 */
794static void vhci_shutdown_connection(struct usbip_device *ud)
795{
796 struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
797
798 /* need this? see stub_dev.c */
799 if (ud->tcp_socket) {
matt mooney1a4b6f62011-05-19 16:47:32 -0700800 pr_debug("shutdown tcp_socket %p\n", ud->tcp_socket);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600801 kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR);
802 }
803
Bart Westgeestc7f00892012-10-10 13:34:27 -0400804 /* kill threads related to this sdev */
navincbf7d122012-09-19 17:04:51 +0530805 if (vdev->ud.tcp_rx) {
Oleg Nesterovba46ce32012-03-13 19:07:18 +0100806 kthread_stop_put(vdev->ud.tcp_rx);
navincbf7d122012-09-19 17:04:51 +0530807 vdev->ud.tcp_rx = NULL;
808 }
809 if (vdev->ud.tcp_tx) {
Oleg Nesterovba46ce32012-03-13 19:07:18 +0100810 kthread_stop_put(vdev->ud.tcp_tx);
navincbf7d122012-09-19 17:04:51 +0530811 vdev->ud.tcp_tx = NULL;
812 }
matt mooney1a4b6f62011-05-19 16:47:32 -0700813 pr_info("stop threads\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600814
815 /* active connection is closed */
Bernard Blackham3d0a2a22012-10-22 06:45:00 +1100816 if (vdev->ud.tcp_socket) {
Al Viro964ea962014-03-05 20:33:08 -0500817 sockfd_put(vdev->ud.tcp_socket);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600818 vdev->ud.tcp_socket = NULL;
819 }
matt mooney1a4b6f62011-05-19 16:47:32 -0700820 pr_info("release socket\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600821
822 vhci_device_unlink_cleanup(vdev);
823
824 /*
825 * rh_port_disconnect() is a trigger of ...
826 * usb_disable_device():
827 * disable all the endpoints for a USB device.
828 * usb_disable_endpoint():
829 * disable endpoints. pending urbs are unlinked(dequeued).
830 *
831 * NOTE: After calling rh_port_disconnect(), the USB device drivers of a
Justin P. Mattock4ec26012012-08-06 08:00:27 -0700832 * detached device should release used urbs in a cleanup function (i.e.
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600833 * xxx_disconnect()). Therefore, vhci_hcd does not need to release
834 * pushed urbs and their private data in this function.
835 *
Justin P. Mattock4ec26012012-08-06 08:00:27 -0700836 * NOTE: vhci_dequeue() must be considered carefully. When shutting down
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600837 * a connection, vhci_shutdown_connection() expects vhci_dequeue()
838 * gives back pushed urbs and frees their private data by request of
839 * the cleanup function of a USB driver. When unlinking a urb with an
840 * active connection, vhci_dequeue() does not give back the urb which
841 * is actually given back by vhci_rx after receiving its return pdu.
842 *
843 */
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900844 rh_port_disconnect(vdev);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600845
matt mooney1a4b6f62011-05-19 16:47:32 -0700846 pr_info("disconnect device\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600847}
848
849
850static void vhci_device_reset(struct usbip_device *ud)
851{
852 struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
Andrew Goodbody21619792016-02-02 17:36:39 +0000853 unsigned long flags;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600854
Andrew Goodbody21619792016-02-02 17:36:39 +0000855 spin_lock_irqsave(&ud->lock, flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600856
857 vdev->speed = 0;
858 vdev->devid = 0;
859
Markus Elfring03f3df82014-11-21 16:33:18 +0100860 usb_put_dev(vdev->udev);
Max Vozeler7606ee82011-01-12 15:02:00 +0200861 vdev->udev = NULL;
862
Bernard Blackham3d0a2a22012-10-22 06:45:00 +1100863 if (ud->tcp_socket) {
Al Viro964ea962014-03-05 20:33:08 -0500864 sockfd_put(ud->tcp_socket);
Bernard Blackham3d0a2a22012-10-22 06:45:00 +1100865 ud->tcp_socket = NULL;
866 }
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600867 ud->status = VDEV_ST_NULL;
868
Andrew Goodbody21619792016-02-02 17:36:39 +0000869 spin_unlock_irqrestore(&ud->lock, flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600870}
871
872static void vhci_device_unusable(struct usbip_device *ud)
873{
Andrew Goodbody21619792016-02-02 17:36:39 +0000874 unsigned long flags;
875
876 spin_lock_irqsave(&ud->lock, flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600877 ud->status = VDEV_ST_ERROR;
Andrew Goodbody21619792016-02-02 17:36:39 +0000878 spin_unlock_irqrestore(&ud->lock, flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600879}
880
881static void vhci_device_init(struct vhci_device *vdev)
882{
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900883 memset(vdev, 0, sizeof(struct vhci_device));
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600884
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600885 vdev->ud.side = USBIP_VHCI;
886 vdev->ud.status = VDEV_ST_NULL;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600887 spin_lock_init(&vdev->ud.lock);
888
889 INIT_LIST_HEAD(&vdev->priv_rx);
890 INIT_LIST_HEAD(&vdev->priv_tx);
891 INIT_LIST_HEAD(&vdev->unlink_tx);
892 INIT_LIST_HEAD(&vdev->unlink_rx);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600893 spin_lock_init(&vdev->priv_lock);
894
895 init_waitqueue_head(&vdev->waitq_tx);
896
897 vdev->ud.eh_ops.shutdown = vhci_shutdown_connection;
898 vdev->ud.eh_ops.reset = vhci_device_reset;
899 vdev->ud.eh_ops.unusable = vhci_device_unusable;
900
901 usbip_start_eh(&vdev->ud);
902}
903
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900904static int hcd_name_to_id(const char *name)
905{
906 char *c;
907 long val;
908 int ret;
909
910 c = strchr(name, '.');
911 if (c == NULL)
912 return 0;
913
914 ret = kstrtol(c+1, 10, &val);
915 if (ret < 0)
916 return ret;
917
918 return val;
919}
920
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600921static int vhci_start(struct usb_hcd *hcd)
922{
923 struct vhci_hcd *vhci = hcd_to_vhci(hcd);
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900924 int id, rhport;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600925 int err = 0;
926
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600927 usbip_dbg_vhci_hc("enter vhci_start\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600928
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600929 /* initialize private data of usb_hcd */
930
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900931 for (rhport = 0; rhport < VHCI_HC_PORTS; rhport++) {
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600932 struct vhci_device *vdev = &vhci->vdev[rhport];
Pawel Lebioda3eed8c02014-05-14 19:20:27 +0200933
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600934 vhci_device_init(vdev);
935 vdev->rhport = rhport;
936 }
937
938 atomic_set(&vhci->seqnum, 0);
939 spin_lock_init(&vhci->lock);
940
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600941 hcd->power_budget = 0; /* no limit */
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600942 hcd->uses_new_polling = 1;
943
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900944 id = hcd_name_to_id(hcd_name(hcd));
945 if (id < 0) {
946 pr_err("invalid vhci name %s\n", hcd_name(hcd));
947 return -EINVAL;
948 }
949
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600950 /* vhci_hcd is now ready to be controlled through sysfs */
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900951 if (id == 0) {
952 err = vhci_init_attr_group();
953 if (err) {
954 pr_err("init attr group\n");
955 return err;
956 }
957 err = sysfs_create_group(&hcd_dev(hcd)->kobj, &vhci_attr_group);
958 if (err) {
959 pr_err("create sysfs files\n");
960 vhci_finish_attr_group();
961 return err;
962 }
963 pr_info("created sysfs %s\n", hcd_name(hcd));
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600964 }
965
966 return 0;
967}
968
969static void vhci_stop(struct usb_hcd *hcd)
970{
971 struct vhci_hcd *vhci = hcd_to_vhci(hcd);
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900972 int id, rhport;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600973
Brian G. Merrellb8868e42009-07-21 00:46:13 -0600974 usbip_dbg_vhci_hc("stop VHCI controller\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600975
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600976 /* 1. remove the userland interface of vhci_hcd */
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900977 id = hcd_name_to_id(hcd_name(hcd));
978 if (id == 0) {
979 sysfs_remove_group(&hcd_dev(hcd)->kobj, &vhci_attr_group);
980 vhci_finish_attr_group();
981 }
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600982
983 /* 2. shutdown all the ports of vhci_hcd */
Nobuo Iwata0775a9c2016-06-13 11:33:40 +0900984 for (rhport = 0; rhport < VHCI_HC_PORTS; rhport++) {
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600985 struct vhci_device *vdev = &vhci->vdev[rhport];
986
987 usbip_event_add(&vdev->ud, VDEV_EVENT_REMOVED);
988 usbip_stop_eh(&vdev->ud);
989 }
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600990}
991
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600992static int vhci_get_frame_number(struct usb_hcd *hcd)
993{
Greg Kroah-Hartman083d5ad2016-06-14 13:41:07 -0700994 dev_err_ratelimited(&hcd->self.root_hub->dev, "Not yet implemented\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600995 return 0;
996}
997
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -0600998#ifdef CONFIG_PM
999
1000/* FIXME: suspend/resume */
1001static int vhci_bus_suspend(struct usb_hcd *hcd)
1002{
1003 struct vhci_hcd *vhci = hcd_to_vhci(hcd);
Andrew Goodbody21619792016-02-02 17:36:39 +00001004 unsigned long flags;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001005
1006 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
1007
Andrew Goodbody21619792016-02-02 17:36:39 +00001008 spin_lock_irqsave(&vhci->lock, flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001009 hcd->state = HC_STATE_SUSPENDED;
Andrew Goodbody21619792016-02-02 17:36:39 +00001010 spin_unlock_irqrestore(&vhci->lock, flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001011
1012 return 0;
1013}
1014
1015static int vhci_bus_resume(struct usb_hcd *hcd)
1016{
1017 struct vhci_hcd *vhci = hcd_to_vhci(hcd);
1018 int rc = 0;
Andrew Goodbody21619792016-02-02 17:36:39 +00001019 unsigned long flags;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001020
1021 dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
1022
Andrew Goodbody21619792016-02-02 17:36:39 +00001023 spin_lock_irqsave(&vhci->lock, flags);
Stefan Reifc46cb542013-02-22 12:13:32 +01001024 if (!HCD_HW_ACCESSIBLE(hcd))
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001025 rc = -ESHUTDOWN;
Stefan Reifc46cb542013-02-22 12:13:32 +01001026 else
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001027 hcd->state = HC_STATE_RUNNING;
Andrew Goodbody21619792016-02-02 17:36:39 +00001028 spin_unlock_irqrestore(&vhci->lock, flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001029
matt mooney87352762011-05-19 21:36:56 -07001030 return rc;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001031}
1032
1033#else
1034
1035#define vhci_bus_suspend NULL
1036#define vhci_bus_resume NULL
1037#endif
1038
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001039static struct hc_driver vhci_hc_driver = {
1040 .description = driver_name,
1041 .product_desc = driver_desc,
1042 .hcd_priv_size = sizeof(struct vhci_hcd),
1043
1044 .flags = HCD_USB2,
1045
1046 .start = vhci_start,
Ruslan Pisarev00512682010-03-15 17:06:44 +02001047 .stop = vhci_stop,
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001048
1049 .urb_enqueue = vhci_urb_enqueue,
1050 .urb_dequeue = vhci_urb_dequeue,
1051
1052 .get_frame_number = vhci_get_frame_number,
1053
1054 .hub_status_data = vhci_hub_status,
1055 .hub_control = vhci_hub_control,
1056 .bus_suspend = vhci_bus_suspend,
1057 .bus_resume = vhci_bus_resume,
1058};
1059
1060static int vhci_hcd_probe(struct platform_device *pdev)
1061{
1062 struct usb_hcd *hcd;
1063 int ret;
1064
Brian G. Merrellb8868e42009-07-21 00:46:13 -06001065 usbip_dbg_vhci_hc("name %s id %d\n", pdev->name, pdev->id);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001066
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001067 /*
1068 * Allocate and initialize hcd.
1069 * Our private data is also allocated automatically.
1070 */
Kay Sieverse9133972008-10-30 01:59:32 +01001071 hcd = usb_create_hcd(&vhci_hc_driver, &pdev->dev, dev_name(&pdev->dev));
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001072 if (!hcd) {
matt mooney1a4b6f62011-05-19 16:47:32 -07001073 pr_err("create hcd failed\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001074 return -ENOMEM;
1075 }
Alan Sterncee6a262011-05-02 14:21:44 -04001076 hcd->has_tt = 1;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001077
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001078 /*
1079 * Finish generic HCD structure initialization and register.
1080 * Call the driver's reset() and start() routines.
1081 */
1082 ret = usb_add_hcd(hcd, 0, 0);
1083 if (ret != 0) {
matt mooney1a4b6f62011-05-19 16:47:32 -07001084 pr_err("usb_add_hcd failed %d\n", ret);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001085 usb_put_hcd(hcd);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001086 return ret;
1087 }
1088
Brian G. Merrellb8868e42009-07-21 00:46:13 -06001089 usbip_dbg_vhci_hc("bye\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001090 return 0;
1091}
1092
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001093static int vhci_hcd_remove(struct platform_device *pdev)
1094{
1095 struct usb_hcd *hcd;
1096
1097 hcd = platform_get_drvdata(pdev);
1098 if (!hcd)
1099 return 0;
1100
1101 /*
1102 * Disconnects the root hub,
1103 * then reverses the effects of usb_add_hcd(),
1104 * invoking the HCD's stop() methods.
1105 */
1106 usb_remove_hcd(hcd);
1107 usb_put_hcd(hcd);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001108
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001109 return 0;
1110}
1111
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001112#ifdef CONFIG_PM
1113
1114/* what should happen for USB/IP under suspend/resume? */
1115static int vhci_hcd_suspend(struct platform_device *pdev, pm_message_t state)
1116{
1117 struct usb_hcd *hcd;
Nobuo Iwata0775a9c2016-06-13 11:33:40 +09001118 struct vhci_hcd *vhci;
1119 int rhport;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001120 int connected = 0;
1121 int ret = 0;
Andrew Goodbody21619792016-02-02 17:36:39 +00001122 unsigned long flags;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001123
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001124 hcd = platform_get_drvdata(pdev);
Nobuo Iwata0775a9c2016-06-13 11:33:40 +09001125 if (!hcd)
1126 return 0;
1127 vhci = hcd_to_vhci(hcd);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001128
Nobuo Iwata0775a9c2016-06-13 11:33:40 +09001129 spin_lock_irqsave(&vhci->lock, flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001130
Nobuo Iwata0775a9c2016-06-13 11:33:40 +09001131 for (rhport = 0; rhport < VHCI_HC_PORTS; rhport++)
1132 if (vhci->port_status[rhport] & USB_PORT_STAT_CONNECTION)
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001133 connected += 1;
1134
Nobuo Iwata0775a9c2016-06-13 11:33:40 +09001135 spin_unlock_irqrestore(&vhci->lock, flags);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001136
1137 if (connected > 0) {
Cédric Cabessa7923a652014-03-19 23:04:57 +01001138 dev_info(&pdev->dev,
1139 "We have %d active connection%s. Do not suspend.\n",
1140 connected, (connected == 1 ? "" : "s"));
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001141 ret = -EBUSY;
1142 } else {
matt mooney1a4b6f62011-05-19 16:47:32 -07001143 dev_info(&pdev->dev, "suspend vhci_hcd");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001144 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1145 }
1146
1147 return ret;
1148}
1149
1150static int vhci_hcd_resume(struct platform_device *pdev)
1151{
1152 struct usb_hcd *hcd;
1153
1154 dev_dbg(&pdev->dev, "%s\n", __func__);
1155
1156 hcd = platform_get_drvdata(pdev);
Nobuo Iwata0775a9c2016-06-13 11:33:40 +09001157 if (!hcd)
1158 return 0;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001159 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
1160 usb_hcd_poll_rh_status(hcd);
1161
1162 return 0;
1163}
1164
1165#else
1166
1167#define vhci_hcd_suspend NULL
1168#define vhci_hcd_resume NULL
1169
1170#endif
1171
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001172static struct platform_driver vhci_driver = {
1173 .probe = vhci_hcd_probe,
Bill Pembertonf307da92012-11-19 13:21:02 -05001174 .remove = vhci_hcd_remove,
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001175 .suspend = vhci_hcd_suspend,
1176 .resume = vhci_hcd_resume,
1177 .driver = {
Geert Uytterhoeven1c126bc2013-11-12 20:07:19 +01001178 .name = driver_name,
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001179 },
1180};
1181
Nobuo Iwata0775a9c2016-06-13 11:33:40 +09001182static int add_platform_device(int id)
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001183{
Nobuo Iwata0775a9c2016-06-13 11:33:40 +09001184 struct platform_device *pdev;
1185 int dev_nr;
1186
1187 if (id == 0)
1188 dev_nr = -1;
1189 else
1190 dev_nr = id;
1191
1192 pdev = platform_device_register_simple(driver_name, dev_nr, NULL, 0);
Wei Yongjun6e958052016-08-12 11:22:22 +00001193 if (IS_ERR(pdev))
1194 return PTR_ERR(pdev);
Nobuo Iwata0775a9c2016-06-13 11:33:40 +09001195
1196 *(vhci_pdevs + id) = pdev;
1197 return 0;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001198}
1199
Nobuo Iwata0775a9c2016-06-13 11:33:40 +09001200static void del_platform_devices(void)
1201{
1202 struct platform_device *pdev;
1203 int i;
1204
1205 for (i = 0; i < vhci_num_controllers; i++) {
1206 pdev = *(vhci_pdevs + i);
1207 if (pdev != NULL)
1208 platform_device_unregister(pdev);
1209 *(vhci_pdevs + i) = NULL;
1210 }
1211 sysfs_remove_link(&platform_bus.kobj, driver_name);
1212}
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001213
matt mooney0392bbb2011-05-19 21:37:06 -07001214static int __init vhci_hcd_init(void)
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001215{
Nobuo Iwata0775a9c2016-06-13 11:33:40 +09001216 int i, ret;
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001217
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001218 if (usb_disabled())
1219 return -ENODEV;
1220
Nobuo Iwata0775a9c2016-06-13 11:33:40 +09001221 if (vhci_num_controllers < 1)
1222 vhci_num_controllers = 1;
1223
1224 vhci_pdevs = kcalloc(vhci_num_controllers, sizeof(void *), GFP_KERNEL);
1225 if (vhci_pdevs == NULL)
1226 return -ENOMEM;
1227
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001228 ret = platform_driver_register(&vhci_driver);
navin patidar4d421952013-09-10 10:43:39 +05301229 if (ret)
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001230 goto err_driver_register;
1231
Nobuo Iwata0775a9c2016-06-13 11:33:40 +09001232 for (i = 0; i < vhci_num_controllers; i++) {
1233 ret = add_platform_device(i);
1234 if (ret)
1235 goto err_platform_device_register;
1236 }
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001237
matt mooney1a4b6f62011-05-19 16:47:32 -07001238 pr_info(DRIVER_DESC " v" USBIP_VERSION "\n");
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001239 return ret;
1240
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001241err_platform_device_register:
Nobuo Iwata0775a9c2016-06-13 11:33:40 +09001242 del_platform_devices();
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001243 platform_driver_unregister(&vhci_driver);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001244err_driver_register:
Nobuo Iwata0775a9c2016-06-13 11:33:40 +09001245 kfree(vhci_pdevs);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001246 return ret;
1247}
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001248
matt mooney0392bbb2011-05-19 21:37:06 -07001249static void __exit vhci_hcd_exit(void)
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001250{
Nobuo Iwata0775a9c2016-06-13 11:33:40 +09001251 del_platform_devices();
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001252 platform_driver_unregister(&vhci_driver);
Nobuo Iwata0775a9c2016-06-13 11:33:40 +09001253 kfree(vhci_pdevs);
Takahiro Hirofuchi04679b32008-07-09 14:56:51 -06001254}
matt mooney071d1d42011-05-06 03:47:50 -07001255
matt mooney0392bbb2011-05-19 21:37:06 -07001256module_init(vhci_hcd_init);
1257module_exit(vhci_hcd_exit);
matt mooney071d1d42011-05-06 03:47:50 -07001258
1259MODULE_AUTHOR(DRIVER_AUTHOR);
1260MODULE_DESCRIPTION(DRIVER_DESC);
matt mooney4ce0a412011-05-06 03:47:56 -07001261MODULE_LICENSE("GPL");
matt mooney6973c6f2011-05-11 01:54:14 -07001262MODULE_VERSION(USBIP_VERSION);