Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 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 | |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 20 | #include <linux/slab.h> |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 21 | |
| 22 | #include "usbip_common.h" |
| 23 | #include "vhci.h" |
| 24 | |
| 25 | #define DRIVER_VERSION "1.0" |
| 26 | #define DRIVER_AUTHOR "Takahiro Hirofuchi" |
| 27 | #define DRIVER_DESC "Virtual Host Controller Interface Driver for USB/IP" |
| 28 | #define DRIVER_LICENCE "GPL" |
| 29 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 30 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 31 | MODULE_LICENSE(DRIVER_LICENCE); |
| 32 | |
| 33 | |
| 34 | |
| 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 | |
| 45 | |
| 46 | /* See usb gadget dummy hcd */ |
| 47 | |
| 48 | |
| 49 | static int vhci_hub_status(struct usb_hcd *hcd, char *buff); |
| 50 | static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, |
| 51 | u16 wIndex, char *buff, u16 wLength); |
| 52 | static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, |
| 53 | gfp_t mem_flags); |
| 54 | static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status); |
| 55 | static int vhci_start(struct usb_hcd *vhci_hcd); |
| 56 | static void vhci_stop(struct usb_hcd *hcd); |
| 57 | static int vhci_get_frame_number(struct usb_hcd *hcd); |
| 58 | |
| 59 | static const char driver_name[] = "vhci_hcd"; |
Robert P. J. Day | f5e08ca7 | 2009-11-13 15:13:43 -0500 | [diff] [blame] | 60 | static const char driver_desc[] = "USB/IP Virtual Host Controller"; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 61 | |
| 62 | struct vhci_hcd *the_controller; |
| 63 | |
| 64 | static const char *bit_desc[] = { |
| 65 | "CONNECTION", /*0*/ |
| 66 | "ENABLE", /*1*/ |
| 67 | "SUSPEND", /*2*/ |
| 68 | "OVER_CURRENT", /*3*/ |
| 69 | "RESET", /*4*/ |
| 70 | "R5", /*5*/ |
| 71 | "R6", /*6*/ |
| 72 | "R7", /*7*/ |
| 73 | "POWER", /*8*/ |
| 74 | "LOWSPEED", /*9*/ |
| 75 | "HIGHSPEED", /*10*/ |
| 76 | "PORT_TEST", /*11*/ |
| 77 | "INDICATOR", /*12*/ |
| 78 | "R13", /*13*/ |
| 79 | "R14", /*14*/ |
| 80 | "R15", /*15*/ |
| 81 | "C_CONNECTION", /*16*/ |
| 82 | "C_ENABLE", /*17*/ |
| 83 | "C_SUSPEND", /*18*/ |
| 84 | "C_OVER_CURRENT", /*19*/ |
| 85 | "C_RESET", /*20*/ |
| 86 | "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*/ |
| 97 | }; |
| 98 | |
| 99 | |
| 100 | static void dump_port_status(u32 status) |
| 101 | { |
| 102 | int i = 0; |
| 103 | |
| 104 | printk(KERN_DEBUG "status %08x:", status); |
| 105 | for (i = 0; i < 32; i++) { |
| 106 | if (status & (1 << i)) |
| 107 | printk(" %s", bit_desc[i]); |
| 108 | } |
| 109 | |
| 110 | printk("\n"); |
| 111 | } |
| 112 | |
| 113 | |
| 114 | |
| 115 | void rh_port_connect(int rhport, enum usb_device_speed speed) |
| 116 | { |
| 117 | unsigned long flags; |
| 118 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 119 | usbip_dbg_vhci_rh("rh_port_connect %d\n", rhport); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 120 | |
| 121 | spin_lock_irqsave(&the_controller->lock, flags); |
| 122 | |
| 123 | the_controller->port_status[rhport] |= USB_PORT_STAT_CONNECTION |
| 124 | | (1 << USB_PORT_FEAT_C_CONNECTION); |
| 125 | |
| 126 | switch (speed) { |
| 127 | case USB_SPEED_HIGH: |
| 128 | the_controller->port_status[rhport] |= USB_PORT_STAT_HIGH_SPEED; |
| 129 | break; |
| 130 | case USB_SPEED_LOW: |
| 131 | the_controller->port_status[rhport] |= USB_PORT_STAT_LOW_SPEED; |
| 132 | break; |
| 133 | default: |
| 134 | break; |
| 135 | } |
| 136 | |
| 137 | /* spin_lock(&the_controller->vdev[rhport].ud.lock); |
| 138 | * the_controller->vdev[rhport].ud.status = VDEV_CONNECT; |
| 139 | * spin_unlock(&the_controller->vdev[rhport].ud.lock); */ |
| 140 | |
| 141 | the_controller->pending_port = rhport; |
| 142 | |
| 143 | spin_unlock_irqrestore(&the_controller->lock, flags); |
| 144 | |
| 145 | usb_hcd_poll_rh_status(vhci_to_hcd(the_controller)); |
| 146 | } |
| 147 | |
| 148 | void rh_port_disconnect(int rhport) |
| 149 | { |
| 150 | unsigned long flags; |
| 151 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 152 | usbip_dbg_vhci_rh("rh_port_disconnect %d\n", rhport); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 153 | |
| 154 | spin_lock_irqsave(&the_controller->lock, flags); |
| 155 | /* stop_activity(dum, driver); */ |
| 156 | the_controller->port_status[rhport] &= ~USB_PORT_STAT_CONNECTION; |
| 157 | the_controller->port_status[rhport] |= |
| 158 | (1 << USB_PORT_FEAT_C_CONNECTION); |
| 159 | |
| 160 | |
| 161 | /* not yet complete the disconnection |
| 162 | * spin_lock(&vdev->ud.lock); |
| 163 | * vdev->ud.status = VHC_ST_DISCONNECT; |
| 164 | * spin_unlock(&vdev->ud.lock); */ |
| 165 | |
| 166 | spin_unlock_irqrestore(&the_controller->lock, flags); |
| 167 | } |
| 168 | |
| 169 | |
| 170 | |
| 171 | /*----------------------------------------------------------------------*/ |
| 172 | |
| 173 | #define PORT_C_MASK \ |
| 174 | ((USB_PORT_STAT_C_CONNECTION \ |
| 175 | | USB_PORT_STAT_C_ENABLE \ |
| 176 | | USB_PORT_STAT_C_SUSPEND \ |
| 177 | | USB_PORT_STAT_C_OVERCURRENT \ |
| 178 | | USB_PORT_STAT_C_RESET) << 16) |
| 179 | |
| 180 | /* |
| 181 | * This function is almostly the same as dummy_hcd.c:dummy_hub_status() without |
| 182 | * suspend/resume support. But, it is modified to provide multiple ports. |
| 183 | * |
| 184 | * @buf: a bitmap to show which port status has been changed. |
| 185 | * bit 0: reserved or used for another purpose? |
| 186 | * bit 1: the status of port 0 has been changed. |
| 187 | * bit 2: the status of port 1 has been changed. |
| 188 | * ... |
| 189 | * bit 7: the status of port 6 has been changed. |
| 190 | * bit 8: the status of port 7 has been changed. |
| 191 | * ... |
| 192 | * bit 15: the status of port 14 has been changed. |
| 193 | * |
| 194 | * So, the maximum number of ports is 31 ( port 0 to port 30) ? |
| 195 | * |
| 196 | * The return value is the actual transfered length in byte. If nothing has |
| 197 | * been changed, return 0. In the case that the number of ports is less than or |
| 198 | * equal to 6 (VHCI_NPORTS==7), return 1. |
| 199 | * |
| 200 | */ |
| 201 | static int vhci_hub_status(struct usb_hcd *hcd, char *buf) |
| 202 | { |
| 203 | struct vhci_hcd *vhci; |
| 204 | unsigned long flags; |
| 205 | int retval = 0; |
| 206 | |
| 207 | /* the enough buffer is allocated according to USB_MAXCHILDREN */ |
| 208 | unsigned long *event_bits = (unsigned long *) buf; |
| 209 | int rhport; |
| 210 | int changed = 0; |
| 211 | |
| 212 | |
| 213 | *event_bits = 0; |
| 214 | |
| 215 | vhci = hcd_to_vhci(hcd); |
| 216 | |
| 217 | spin_lock_irqsave(&vhci->lock, flags); |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame^] | 218 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 219 | usbip_dbg_vhci_rh("hw accessible flag in on?\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 220 | goto done; |
| 221 | } |
| 222 | |
| 223 | /* check pseudo status register for each port */ |
| 224 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) { |
| 225 | if ((vhci->port_status[rhport] & PORT_C_MASK)) { |
| 226 | /* The status of a port has been changed, */ |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 227 | usbip_dbg_vhci_rh("port %d is changed\n", rhport); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 228 | |
| 229 | *event_bits |= 1 << (rhport + 1); |
| 230 | changed = 1; |
| 231 | } |
| 232 | } |
| 233 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 234 | usbip_uinfo("changed %d\n", changed); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 235 | |
| 236 | if (hcd->state == HC_STATE_SUSPENDED) |
| 237 | usb_hcd_resume_root_hub(hcd); |
| 238 | |
| 239 | if (changed) |
| 240 | retval = 1 + (VHCI_NPORTS / 8); |
| 241 | else |
| 242 | retval = 0; |
| 243 | |
| 244 | done: |
| 245 | spin_unlock_irqrestore(&vhci->lock, flags); |
| 246 | return retval; |
| 247 | } |
| 248 | |
| 249 | /* See hub_configure in hub.c */ |
| 250 | static inline void hub_descriptor(struct usb_hub_descriptor *desc) |
| 251 | { |
| 252 | memset(desc, 0, sizeof(*desc)); |
| 253 | desc->bDescriptorType = 0x29; |
| 254 | desc->bDescLength = 9; |
| 255 | desc->wHubCharacteristics = (__force __u16) |
| 256 | (__constant_cpu_to_le16(0x0001)); |
| 257 | desc->bNbrPorts = VHCI_NPORTS; |
| 258 | desc->bitmap[0] = 0xff; |
| 259 | desc->bitmap[1] = 0xff; |
| 260 | } |
| 261 | |
| 262 | static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, |
| 263 | u16 wIndex, char *buf, u16 wLength) |
| 264 | { |
| 265 | struct vhci_hcd *dum; |
| 266 | int retval = 0; |
| 267 | unsigned long flags; |
| 268 | int rhport; |
| 269 | |
| 270 | u32 prev_port_status[VHCI_NPORTS]; |
| 271 | |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame^] | 272 | if (!HCD_HW_ACCESSIBLE(hcd)) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 273 | return -ETIMEDOUT; |
| 274 | |
| 275 | /* |
| 276 | * NOTE: |
| 277 | * wIndex shows the port number and begins from 1. |
| 278 | */ |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 279 | usbip_dbg_vhci_rh("typeReq %x wValue %x wIndex %x\n", typeReq, wValue, |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 280 | wIndex); |
| 281 | if (wIndex > VHCI_NPORTS) |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 282 | printk(KERN_ERR "%s: invalid port number %d\n", __func__, |
| 283 | wIndex); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 284 | rhport = ((__u8)(wIndex & 0x00ff)) - 1; |
| 285 | |
| 286 | dum = hcd_to_vhci(hcd); |
| 287 | |
| 288 | spin_lock_irqsave(&dum->lock, flags); |
| 289 | |
| 290 | /* store old status and compare now and old later */ |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 291 | if (usbip_dbg_flag_vhci_rh) { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 292 | int i = 0; |
| 293 | for (i = 0; i < VHCI_NPORTS; i++) |
| 294 | prev_port_status[i] = dum->port_status[i]; |
| 295 | } |
| 296 | |
| 297 | switch (typeReq) { |
| 298 | case ClearHubFeature: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 299 | usbip_dbg_vhci_rh(" ClearHubFeature\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 300 | break; |
| 301 | case ClearPortFeature: |
| 302 | switch (wValue) { |
| 303 | case USB_PORT_FEAT_SUSPEND: |
| 304 | if (dum->port_status[rhport] & USB_PORT_STAT_SUSPEND) { |
| 305 | /* 20msec signaling */ |
| 306 | dum->resuming = 1; |
| 307 | dum->re_timeout = |
| 308 | jiffies + msecs_to_jiffies(20); |
| 309 | } |
| 310 | break; |
| 311 | case USB_PORT_FEAT_POWER: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 312 | usbip_dbg_vhci_rh(" ClearPortFeature: " |
| 313 | "USB_PORT_FEAT_POWER\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 314 | dum->port_status[rhport] = 0; |
| 315 | /* dum->address = 0; */ |
| 316 | /* dum->hdev = 0; */ |
| 317 | dum->resuming = 0; |
| 318 | break; |
| 319 | case USB_PORT_FEAT_C_RESET: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 320 | usbip_dbg_vhci_rh(" ClearPortFeature: " |
| 321 | "USB_PORT_FEAT_C_RESET\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 322 | switch (dum->vdev[rhport].speed) { |
| 323 | case USB_SPEED_HIGH: |
| 324 | dum->port_status[rhport] |= |
| 325 | USB_PORT_STAT_HIGH_SPEED; |
| 326 | break; |
| 327 | case USB_SPEED_LOW: |
| 328 | dum->port_status[rhport] |= |
| 329 | USB_PORT_STAT_LOW_SPEED; |
| 330 | break; |
| 331 | default: |
| 332 | break; |
| 333 | } |
| 334 | default: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 335 | usbip_dbg_vhci_rh(" ClearPortFeature: default %x\n", |
| 336 | wValue); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 337 | dum->port_status[rhport] &= ~(1 << wValue); |
| 338 | } |
| 339 | break; |
| 340 | case GetHubDescriptor: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 341 | usbip_dbg_vhci_rh(" GetHubDescriptor\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 342 | hub_descriptor((struct usb_hub_descriptor *) buf); |
| 343 | break; |
| 344 | case GetHubStatus: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 345 | usbip_dbg_vhci_rh(" GetHubStatus\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 346 | *(__le32 *) buf = __constant_cpu_to_le32(0); |
| 347 | break; |
| 348 | case GetPortStatus: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 349 | usbip_dbg_vhci_rh(" GetPortStatus port %x\n", wIndex); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 350 | if (wIndex > VHCI_NPORTS || wIndex < 1) { |
| 351 | printk(KERN_ERR "%s: invalid port number %d\n", |
| 352 | __func__, wIndex); |
| 353 | retval = -EPIPE; |
| 354 | } |
| 355 | |
| 356 | /* we do no care of resume. */ |
| 357 | |
| 358 | /* whoever resets or resumes must GetPortStatus to |
| 359 | * complete it!! |
| 360 | * */ |
| 361 | if (dum->resuming && time_after(jiffies, dum->re_timeout)) { |
| 362 | printk(KERN_ERR "%s: not yet\n", __func__); |
| 363 | dum->port_status[rhport] |= |
| 364 | (1 << USB_PORT_FEAT_C_SUSPEND); |
| 365 | dum->port_status[rhport] &= |
| 366 | ~(1 << USB_PORT_FEAT_SUSPEND); |
| 367 | dum->resuming = 0; |
| 368 | dum->re_timeout = 0; |
| 369 | /* if (dum->driver && dum->driver->resume) { |
| 370 | * spin_unlock (&dum->lock); |
| 371 | * dum->driver->resume (&dum->gadget); |
| 372 | * spin_lock (&dum->lock); |
| 373 | * } */ |
| 374 | } |
| 375 | |
| 376 | if ((dum->port_status[rhport] & (1 << USB_PORT_FEAT_RESET)) != |
| 377 | 0 && time_after(jiffies, dum->re_timeout)) { |
| 378 | dum->port_status[rhport] |= |
| 379 | (1 << USB_PORT_FEAT_C_RESET); |
| 380 | dum->port_status[rhport] &= |
| 381 | ~(1 << USB_PORT_FEAT_RESET); |
| 382 | dum->re_timeout = 0; |
| 383 | |
| 384 | if (dum->vdev[rhport].ud.status == |
| 385 | VDEV_ST_NOTASSIGNED) { |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 386 | usbip_dbg_vhci_rh(" enable rhport %d " |
| 387 | "(status %u)\n", |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 388 | rhport, |
| 389 | dum->vdev[rhport].ud.status); |
| 390 | dum->port_status[rhport] |= |
| 391 | USB_PORT_STAT_ENABLE; |
| 392 | } |
| 393 | #if 0 |
| 394 | if (dum->driver) { |
| 395 | |
| 396 | dum->port_status[rhport] |= |
| 397 | USB_PORT_STAT_ENABLE; |
| 398 | /* give it the best speed we agree on */ |
| 399 | dum->gadget.speed = dum->driver->speed; |
| 400 | dum->gadget.ep0->maxpacket = 64; |
| 401 | switch (dum->gadget.speed) { |
| 402 | case USB_SPEED_HIGH: |
| 403 | dum->port_status[rhport] |= |
| 404 | USB_PORT_STAT_HIGH_SPEED; |
| 405 | break; |
| 406 | case USB_SPEED_LOW: |
| 407 | dum->gadget.ep0->maxpacket = 8; |
| 408 | dum->port_status[rhport] |= |
| 409 | USB_PORT_STAT_LOW_SPEED; |
| 410 | break; |
| 411 | default: |
| 412 | dum->gadget.speed = USB_SPEED_FULL; |
| 413 | break; |
| 414 | } |
| 415 | } |
| 416 | #endif |
| 417 | |
| 418 | } |
| 419 | ((u16 *) buf)[0] = cpu_to_le16(dum->port_status[rhport]); |
| 420 | ((u16 *) buf)[1] = |
| 421 | cpu_to_le16(dum->port_status[rhport] >> 16); |
| 422 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 423 | usbip_dbg_vhci_rh(" GetPortStatus bye %x %x\n", ((u16 *)buf)[0], |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 424 | ((u16 *)buf)[1]); |
| 425 | break; |
| 426 | case SetHubFeature: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 427 | usbip_dbg_vhci_rh(" SetHubFeature\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 428 | retval = -EPIPE; |
| 429 | break; |
| 430 | case SetPortFeature: |
| 431 | switch (wValue) { |
| 432 | case USB_PORT_FEAT_SUSPEND: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 433 | usbip_dbg_vhci_rh(" SetPortFeature: " |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 434 | "USB_PORT_FEAT_SUSPEND\n"); |
| 435 | printk(KERN_ERR "%s: not yet\n", __func__); |
| 436 | #if 0 |
| 437 | dum->port_status[rhport] |= |
| 438 | (1 << USB_PORT_FEAT_SUSPEND); |
| 439 | if (dum->driver->suspend) { |
| 440 | spin_unlock(&dum->lock); |
| 441 | dum->driver->suspend(&dum->gadget); |
| 442 | spin_lock(&dum->lock); |
| 443 | } |
| 444 | #endif |
| 445 | break; |
| 446 | case USB_PORT_FEAT_RESET: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 447 | usbip_dbg_vhci_rh(" SetPortFeature: " |
| 448 | "USB_PORT_FEAT_RESET\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 449 | /* if it's already running, disconnect first */ |
| 450 | if (dum->port_status[rhport] & USB_PORT_STAT_ENABLE) { |
| 451 | dum->port_status[rhport] &= |
| 452 | ~(USB_PORT_STAT_ENABLE | |
| 453 | USB_PORT_STAT_LOW_SPEED | |
| 454 | USB_PORT_STAT_HIGH_SPEED); |
| 455 | #if 0 |
| 456 | if (dum->driver) { |
| 457 | dev_dbg(hardware, "disconnect\n"); |
| 458 | stop_activity(dum, dum->driver); |
| 459 | } |
| 460 | #endif |
| 461 | |
| 462 | /* FIXME test that code path! */ |
| 463 | } |
| 464 | /* 50msec reset signaling */ |
| 465 | dum->re_timeout = jiffies + msecs_to_jiffies(50); |
| 466 | |
| 467 | /* FALLTHROUGH */ |
| 468 | default: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 469 | usbip_dbg_vhci_rh(" SetPortFeature: default %d\n", |
| 470 | wValue); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 471 | dum->port_status[rhport] |= (1 << wValue); |
| 472 | } |
| 473 | break; |
| 474 | |
| 475 | default: |
| 476 | printk(KERN_ERR "%s: default: no such request\n", __func__); |
| 477 | /* dev_dbg (hardware, |
| 478 | * "hub control req%04x v%04x i%04x l%d\n", |
| 479 | * typeReq, wValue, wIndex, wLength); */ |
| 480 | |
| 481 | /* "protocol stall" on error */ |
| 482 | retval = -EPIPE; |
| 483 | } |
| 484 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 485 | if (usbip_dbg_flag_vhci_rh) { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 486 | printk(KERN_DEBUG "port %d\n", rhport); |
| 487 | dump_port_status(prev_port_status[rhport]); |
| 488 | dump_port_status(dum->port_status[rhport]); |
| 489 | } |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 490 | usbip_dbg_vhci_rh(" bye\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 491 | |
| 492 | spin_unlock_irqrestore(&dum->lock, flags); |
| 493 | |
| 494 | return retval; |
| 495 | } |
| 496 | |
| 497 | |
| 498 | |
| 499 | /*----------------------------------------------------------------------*/ |
| 500 | |
| 501 | static struct vhci_device *get_vdev(struct usb_device *udev) |
| 502 | { |
| 503 | int i; |
| 504 | |
| 505 | if (!udev) |
| 506 | return NULL; |
| 507 | |
| 508 | for (i = 0; i < VHCI_NPORTS; i++) |
| 509 | if (the_controller->vdev[i].udev == udev) |
| 510 | return port_to_vdev(i); |
| 511 | |
| 512 | return NULL; |
| 513 | } |
| 514 | |
| 515 | static void vhci_tx_urb(struct urb *urb) |
| 516 | { |
| 517 | struct vhci_device *vdev = get_vdev(urb->dev); |
| 518 | struct vhci_priv *priv; |
| 519 | unsigned long flag; |
| 520 | |
| 521 | if (!vdev) { |
| 522 | err("could not get virtual device"); |
| 523 | /* BUG(); */ |
| 524 | return; |
| 525 | } |
| 526 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 527 | priv = kzalloc(sizeof(struct vhci_priv), GFP_ATOMIC); |
| 528 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 529 | spin_lock_irqsave(&vdev->priv_lock, flag); |
| 530 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 531 | if (!priv) { |
| 532 | dev_err(&urb->dev->dev, "malloc vhci_priv\n"); |
| 533 | spin_unlock_irqrestore(&vdev->priv_lock, flag); |
| 534 | usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC); |
| 535 | return; |
| 536 | } |
| 537 | |
| 538 | priv->seqnum = atomic_inc_return(&the_controller->seqnum); |
| 539 | if (priv->seqnum == 0xffff) |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 540 | usbip_uinfo("seqnum max\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 541 | |
| 542 | priv->vdev = vdev; |
| 543 | priv->urb = urb; |
| 544 | |
| 545 | urb->hcpriv = (void *) priv; |
| 546 | |
| 547 | |
| 548 | list_add_tail(&priv->list, &vdev->priv_tx); |
| 549 | |
| 550 | wake_up(&vdev->waitq_tx); |
| 551 | spin_unlock_irqrestore(&vdev->priv_lock, flag); |
| 552 | } |
| 553 | |
| 554 | static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, |
| 555 | gfp_t mem_flags) |
| 556 | { |
| 557 | struct device *dev = &urb->dev->dev; |
| 558 | int ret = 0; |
| 559 | unsigned long flags; |
| 560 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 561 | usbip_dbg_vhci_hc("enter, usb_hcd %p urb %p mem_flags %d\n", |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 562 | hcd, urb, mem_flags); |
| 563 | |
| 564 | /* patch to usb_sg_init() is in 2.5.60 */ |
| 565 | BUG_ON(!urb->transfer_buffer && urb->transfer_buffer_length); |
| 566 | |
| 567 | spin_lock_irqsave(&the_controller->lock, flags); |
| 568 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 569 | if (urb->status != -EINPROGRESS) { |
| 570 | dev_err(dev, "URB already unlinked!, status %d\n", urb->status); |
| 571 | spin_unlock_irqrestore(&the_controller->lock, flags); |
| 572 | return urb->status; |
| 573 | } |
| 574 | |
| 575 | ret = usb_hcd_link_urb_to_ep(hcd, urb); |
| 576 | if (ret) |
| 577 | goto no_need_unlink; |
| 578 | |
| 579 | /* |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 580 | * The enumeration process is as follows; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 581 | * |
| 582 | * 1. Get_Descriptor request to DevAddrs(0) EndPoint(0) |
| 583 | * to get max packet length of default pipe |
| 584 | * |
| 585 | * 2. Set_Address request to DevAddr(0) EndPoint(0) |
| 586 | * |
| 587 | */ |
| 588 | |
| 589 | if (usb_pipedevice(urb->pipe) == 0) { |
| 590 | __u8 type = usb_pipetype(urb->pipe); |
| 591 | struct usb_ctrlrequest *ctrlreq = |
| 592 | (struct usb_ctrlrequest *) urb->setup_packet; |
| 593 | struct vhci_device *vdev = |
| 594 | port_to_vdev(the_controller->pending_port); |
| 595 | |
| 596 | if (type != PIPE_CONTROL || !ctrlreq) { |
| 597 | dev_err(dev, "invalid request to devnum 0\n"); |
Shan Wei | a7cd582 | 2009-07-24 16:57:35 +0800 | [diff] [blame] | 598 | ret = -EINVAL; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 599 | goto no_need_xmit; |
| 600 | } |
| 601 | |
| 602 | switch (ctrlreq->bRequest) { |
| 603 | case USB_REQ_SET_ADDRESS: |
| 604 | /* set_address may come when a device is reset */ |
| 605 | dev_info(dev, "SetAddress Request (%d) to port %d\n", |
| 606 | ctrlreq->wValue, vdev->rhport); |
| 607 | |
| 608 | vdev->udev = urb->dev; |
| 609 | |
| 610 | spin_lock(&vdev->ud.lock); |
| 611 | vdev->ud.status = VDEV_ST_USED; |
| 612 | spin_unlock(&vdev->ud.lock); |
| 613 | |
| 614 | if (urb->status == -EINPROGRESS) { |
| 615 | /* This request is successfully completed. */ |
| 616 | /* If not -EINPROGRESS, possibly unlinked. */ |
| 617 | urb->status = 0; |
| 618 | } |
| 619 | |
| 620 | goto no_need_xmit; |
| 621 | |
| 622 | case USB_REQ_GET_DESCRIPTOR: |
| 623 | if (ctrlreq->wValue == (USB_DT_DEVICE << 8)) |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 624 | usbip_dbg_vhci_hc("Not yet?: " |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 625 | "Get_Descriptor to device 0 " |
| 626 | "(get max pipe size)\n"); |
| 627 | |
| 628 | /* FIXME: reference count? (usb_get_dev()) */ |
| 629 | vdev->udev = urb->dev; |
| 630 | goto out; |
| 631 | |
| 632 | default: |
| 633 | /* NOT REACHED */ |
| 634 | dev_err(dev, "invalid request to devnum 0 bRequest %u, " |
| 635 | "wValue %u\n", ctrlreq->bRequest, |
| 636 | ctrlreq->wValue); |
| 637 | ret = -EINVAL; |
| 638 | goto no_need_xmit; |
| 639 | } |
| 640 | |
| 641 | } |
| 642 | |
| 643 | out: |
| 644 | vhci_tx_urb(urb); |
| 645 | |
| 646 | spin_unlock_irqrestore(&the_controller->lock, flags); |
| 647 | |
| 648 | return 0; |
| 649 | |
| 650 | no_need_xmit: |
| 651 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
| 652 | no_need_unlink: |
| 653 | spin_unlock_irqrestore(&the_controller->lock, flags); |
| 654 | |
| 655 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, urb->status); |
| 656 | |
Shan Wei | a7cd582 | 2009-07-24 16:57:35 +0800 | [diff] [blame] | 657 | return ret; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 658 | } |
| 659 | |
| 660 | /* |
| 661 | * vhci_rx gives back the urb after receiving the reply of the urb. If an |
| 662 | * unlink pdu is sent or not, vhci_rx receives a normal return pdu and gives |
| 663 | * back its urb. For the driver unlinking the urb, the content of the urb is |
| 664 | * not important, but the calling to its completion handler is important; the |
| 665 | * completion of unlinking is notified by the completion handler. |
| 666 | * |
| 667 | * |
| 668 | * CLIENT SIDE |
| 669 | * |
| 670 | * - When vhci_hcd receives RET_SUBMIT, |
| 671 | * |
| 672 | * - case 1a). the urb of the pdu is not unlinking. |
| 673 | * - normal case |
| 674 | * => just give back the urb |
| 675 | * |
| 676 | * - case 1b). the urb of the pdu is unlinking. |
| 677 | * - usbip.ko will return a reply of the unlinking request. |
| 678 | * => give back the urb now and go to case 2b). |
| 679 | * |
| 680 | * - When vhci_hcd receives RET_UNLINK, |
| 681 | * |
| 682 | * - case 2a). a submit request is still pending in vhci_hcd. |
| 683 | * - urb was really pending in usbip.ko and urb_unlink_urb() was |
| 684 | * completed there. |
| 685 | * => free a pending submit request |
| 686 | * => notify unlink completeness by giving back the urb |
| 687 | * |
| 688 | * - case 2b). a submit request is *not* pending in vhci_hcd. |
| 689 | * - urb was already given back to the core driver. |
| 690 | * => do not give back the urb |
| 691 | * |
| 692 | * |
| 693 | * SERVER SIDE |
| 694 | * |
| 695 | * - When usbip receives CMD_UNLINK, |
| 696 | * |
| 697 | * - case 3a). the urb of the unlink request is now in submission. |
| 698 | * => do usb_unlink_urb(). |
| 699 | * => after the unlink is completed, send RET_UNLINK. |
| 700 | * |
| 701 | * - case 3b). the urb of the unlink request is not in submission. |
| 702 | * - may be already completed or never be received |
| 703 | * => send RET_UNLINK |
| 704 | * |
| 705 | */ |
| 706 | static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
| 707 | { |
| 708 | unsigned long flags; |
| 709 | struct vhci_priv *priv; |
| 710 | struct vhci_device *vdev; |
| 711 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 712 | usbip_uinfo("vhci_hcd: dequeue a urb %p\n", urb); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 713 | |
| 714 | |
| 715 | spin_lock_irqsave(&the_controller->lock, flags); |
| 716 | |
| 717 | priv = urb->hcpriv; |
| 718 | if (!priv) { |
| 719 | /* URB was never linked! or will be soon given back by |
| 720 | * vhci_rx. */ |
| 721 | spin_unlock_irqrestore(&the_controller->lock, flags); |
| 722 | return 0; |
| 723 | } |
| 724 | |
| 725 | { |
| 726 | int ret = 0; |
| 727 | ret = usb_hcd_check_unlink_urb(hcd, urb, status); |
| 728 | if (ret) { |
| 729 | spin_unlock_irqrestore(&the_controller->lock, flags); |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 730 | return ret; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 731 | } |
| 732 | } |
| 733 | |
| 734 | /* send unlink request here? */ |
| 735 | vdev = priv->vdev; |
| 736 | |
| 737 | if (!vdev->ud.tcp_socket) { |
| 738 | /* tcp connection is closed */ |
| 739 | unsigned long flags2; |
| 740 | |
| 741 | spin_lock_irqsave(&vdev->priv_lock, flags2); |
| 742 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 743 | usbip_uinfo("vhci_hcd: device %p seems to be disconnected\n", |
| 744 | vdev); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 745 | list_del(&priv->list); |
| 746 | kfree(priv); |
| 747 | urb->hcpriv = NULL; |
| 748 | |
| 749 | spin_unlock_irqrestore(&vdev->priv_lock, flags2); |
| 750 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 751 | /* |
| 752 | * If tcp connection is alive, we have sent CMD_UNLINK. |
| 753 | * vhci_rx will receive RET_UNLINK and give back the URB. |
| 754 | * Otherwise, we give back it here. |
| 755 | */ |
| 756 | usbip_uinfo("vhci_hcd: vhci_urb_dequeue() gives back urb %p\n", |
| 757 | urb); |
| 758 | |
| 759 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
| 760 | |
| 761 | spin_unlock_irqrestore(&the_controller->lock, flags); |
| 762 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, |
| 763 | urb->status); |
| 764 | spin_lock_irqsave(&the_controller->lock, flags); |
| 765 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 766 | } else { |
| 767 | /* tcp connection is alive */ |
| 768 | unsigned long flags2; |
| 769 | struct vhci_unlink *unlink; |
| 770 | |
| 771 | spin_lock_irqsave(&vdev->priv_lock, flags2); |
| 772 | |
| 773 | /* setup CMD_UNLINK pdu */ |
| 774 | unlink = kzalloc(sizeof(struct vhci_unlink), GFP_ATOMIC); |
| 775 | if (!unlink) { |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 776 | usbip_uerr("malloc vhci_unlink\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 777 | spin_unlock_irqrestore(&vdev->priv_lock, flags2); |
| 778 | spin_unlock_irqrestore(&the_controller->lock, flags); |
| 779 | usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC); |
| 780 | return -ENOMEM; |
| 781 | } |
| 782 | |
| 783 | unlink->seqnum = atomic_inc_return(&the_controller->seqnum); |
| 784 | if (unlink->seqnum == 0xffff) |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 785 | usbip_uinfo("seqnum max\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 786 | |
| 787 | unlink->unlink_seqnum = priv->seqnum; |
| 788 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 789 | usbip_uinfo("vhci_hcd: device %p seems to be still connected\n", |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 790 | vdev); |
| 791 | |
| 792 | /* send cmd_unlink and try to cancel the pending URB in the |
| 793 | * peer */ |
| 794 | list_add_tail(&unlink->list, &vdev->unlink_tx); |
| 795 | wake_up(&vdev->waitq_tx); |
| 796 | |
| 797 | spin_unlock_irqrestore(&vdev->priv_lock, flags2); |
| 798 | } |
| 799 | |
| 800 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 801 | if (!vdev->ud.tcp_socket) { |
| 802 | /* tcp connection is closed */ |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 803 | usbip_uinfo("vhci_hcd: vhci_urb_dequeue() gives back urb %p\n", |
| 804 | urb); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 805 | |
| 806 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
| 807 | |
| 808 | spin_unlock_irqrestore(&the_controller->lock, flags); |
| 809 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, |
| 810 | urb->status); |
| 811 | spin_lock_irqsave(&the_controller->lock, flags); |
| 812 | } |
| 813 | |
| 814 | spin_unlock_irqrestore(&the_controller->lock, flags); |
| 815 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 816 | usbip_dbg_vhci_hc("leave\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 817 | return 0; |
| 818 | } |
| 819 | |
| 820 | |
| 821 | static void vhci_device_unlink_cleanup(struct vhci_device *vdev) |
| 822 | { |
| 823 | struct vhci_unlink *unlink, *tmp; |
| 824 | |
| 825 | spin_lock(&vdev->priv_lock); |
| 826 | |
| 827 | list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) { |
| 828 | list_del(&unlink->list); |
| 829 | kfree(unlink); |
| 830 | } |
| 831 | |
| 832 | list_for_each_entry_safe(unlink, tmp, &vdev->unlink_rx, list) { |
| 833 | list_del(&unlink->list); |
| 834 | kfree(unlink); |
| 835 | } |
| 836 | |
| 837 | spin_unlock(&vdev->priv_lock); |
| 838 | } |
| 839 | |
| 840 | /* |
| 841 | * The important thing is that only one context begins cleanup. |
| 842 | * This is why error handling and cleanup become simple. |
| 843 | * We do not want to consider race condition as possible. |
| 844 | */ |
| 845 | static void vhci_shutdown_connection(struct usbip_device *ud) |
| 846 | { |
| 847 | struct vhci_device *vdev = container_of(ud, struct vhci_device, ud); |
| 848 | |
| 849 | /* need this? see stub_dev.c */ |
| 850 | if (ud->tcp_socket) { |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 851 | usbip_udbg("shutdown tcp_socket %p\n", ud->tcp_socket); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 852 | kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR); |
| 853 | } |
| 854 | |
| 855 | usbip_stop_threads(&vdev->ud); |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 856 | usbip_uinfo("stop threads\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 857 | |
| 858 | /* active connection is closed */ |
| 859 | if (vdev->ud.tcp_socket != NULL) { |
| 860 | sock_release(vdev->ud.tcp_socket); |
| 861 | vdev->ud.tcp_socket = NULL; |
| 862 | } |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 863 | usbip_uinfo("release socket\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 864 | |
| 865 | vhci_device_unlink_cleanup(vdev); |
| 866 | |
| 867 | /* |
| 868 | * rh_port_disconnect() is a trigger of ... |
| 869 | * usb_disable_device(): |
| 870 | * disable all the endpoints for a USB device. |
| 871 | * usb_disable_endpoint(): |
| 872 | * disable endpoints. pending urbs are unlinked(dequeued). |
| 873 | * |
| 874 | * NOTE: After calling rh_port_disconnect(), the USB device drivers of a |
| 875 | * deteched device should release used urbs in a cleanup function(i.e. |
| 876 | * xxx_disconnect()). Therefore, vhci_hcd does not need to release |
| 877 | * pushed urbs and their private data in this function. |
| 878 | * |
| 879 | * NOTE: vhci_dequeue() must be considered carefully. When shutdowning |
| 880 | * a connection, vhci_shutdown_connection() expects vhci_dequeue() |
| 881 | * gives back pushed urbs and frees their private data by request of |
| 882 | * the cleanup function of a USB driver. When unlinking a urb with an |
| 883 | * active connection, vhci_dequeue() does not give back the urb which |
| 884 | * is actually given back by vhci_rx after receiving its return pdu. |
| 885 | * |
| 886 | */ |
| 887 | rh_port_disconnect(vdev->rhport); |
| 888 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 889 | usbip_uinfo("disconnect device\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 890 | } |
| 891 | |
| 892 | |
| 893 | static void vhci_device_reset(struct usbip_device *ud) |
| 894 | { |
| 895 | struct vhci_device *vdev = container_of(ud, struct vhci_device, ud); |
| 896 | |
| 897 | spin_lock(&ud->lock); |
| 898 | |
| 899 | vdev->speed = 0; |
| 900 | vdev->devid = 0; |
| 901 | |
| 902 | ud->tcp_socket = NULL; |
| 903 | |
| 904 | ud->status = VDEV_ST_NULL; |
| 905 | |
| 906 | spin_unlock(&ud->lock); |
| 907 | } |
| 908 | |
| 909 | static void vhci_device_unusable(struct usbip_device *ud) |
| 910 | { |
| 911 | spin_lock(&ud->lock); |
| 912 | |
| 913 | ud->status = VDEV_ST_ERROR; |
| 914 | |
| 915 | spin_unlock(&ud->lock); |
| 916 | } |
| 917 | |
| 918 | static void vhci_device_init(struct vhci_device *vdev) |
| 919 | { |
| 920 | memset(vdev, 0, sizeof(*vdev)); |
| 921 | |
| 922 | usbip_task_init(&vdev->ud.tcp_rx, "vhci_rx", vhci_rx_loop); |
| 923 | usbip_task_init(&vdev->ud.tcp_tx, "vhci_tx", vhci_tx_loop); |
| 924 | |
| 925 | vdev->ud.side = USBIP_VHCI; |
| 926 | vdev->ud.status = VDEV_ST_NULL; |
| 927 | /* vdev->ud.lock = SPIN_LOCK_UNLOCKED; */ |
| 928 | spin_lock_init(&vdev->ud.lock); |
| 929 | |
| 930 | INIT_LIST_HEAD(&vdev->priv_rx); |
| 931 | INIT_LIST_HEAD(&vdev->priv_tx); |
| 932 | INIT_LIST_HEAD(&vdev->unlink_tx); |
| 933 | INIT_LIST_HEAD(&vdev->unlink_rx); |
| 934 | /* vdev->priv_lock = SPIN_LOCK_UNLOCKED; */ |
| 935 | spin_lock_init(&vdev->priv_lock); |
| 936 | |
| 937 | init_waitqueue_head(&vdev->waitq_tx); |
| 938 | |
| 939 | vdev->ud.eh_ops.shutdown = vhci_shutdown_connection; |
| 940 | vdev->ud.eh_ops.reset = vhci_device_reset; |
| 941 | vdev->ud.eh_ops.unusable = vhci_device_unusable; |
| 942 | |
| 943 | usbip_start_eh(&vdev->ud); |
| 944 | } |
| 945 | |
| 946 | |
| 947 | /*----------------------------------------------------------------------*/ |
| 948 | |
| 949 | static int vhci_start(struct usb_hcd *hcd) |
| 950 | { |
| 951 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); |
| 952 | int rhport; |
| 953 | int err = 0; |
| 954 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 955 | usbip_dbg_vhci_hc("enter vhci_start\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 956 | |
| 957 | |
| 958 | /* initialize private data of usb_hcd */ |
| 959 | |
| 960 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) { |
| 961 | struct vhci_device *vdev = &vhci->vdev[rhport]; |
| 962 | vhci_device_init(vdev); |
| 963 | vdev->rhport = rhport; |
| 964 | } |
| 965 | |
| 966 | atomic_set(&vhci->seqnum, 0); |
| 967 | spin_lock_init(&vhci->lock); |
| 968 | |
| 969 | |
| 970 | |
| 971 | hcd->power_budget = 0; /* no limit */ |
| 972 | hcd->state = HC_STATE_RUNNING; |
| 973 | hcd->uses_new_polling = 1; |
| 974 | |
| 975 | |
| 976 | /* vhci_hcd is now ready to be controlled through sysfs */ |
| 977 | err = sysfs_create_group(&vhci_dev(vhci)->kobj, &dev_attr_group); |
| 978 | if (err) { |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 979 | usbip_uerr("create sysfs files\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 980 | return err; |
| 981 | } |
| 982 | |
| 983 | return 0; |
| 984 | } |
| 985 | |
| 986 | static void vhci_stop(struct usb_hcd *hcd) |
| 987 | { |
| 988 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); |
| 989 | int rhport = 0; |
| 990 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 991 | usbip_dbg_vhci_hc("stop VHCI controller\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 992 | |
| 993 | |
| 994 | /* 1. remove the userland interface of vhci_hcd */ |
| 995 | sysfs_remove_group(&vhci_dev(vhci)->kobj, &dev_attr_group); |
| 996 | |
| 997 | /* 2. shutdown all the ports of vhci_hcd */ |
| 998 | for (rhport = 0 ; rhport < VHCI_NPORTS; rhport++) { |
| 999 | struct vhci_device *vdev = &vhci->vdev[rhport]; |
| 1000 | |
| 1001 | usbip_event_add(&vdev->ud, VDEV_EVENT_REMOVED); |
| 1002 | usbip_stop_eh(&vdev->ud); |
| 1003 | } |
| 1004 | |
| 1005 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 1006 | usbip_uinfo("vhci_stop done\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1007 | } |
| 1008 | |
| 1009 | /*----------------------------------------------------------------------*/ |
| 1010 | |
| 1011 | static int vhci_get_frame_number(struct usb_hcd *hcd) |
| 1012 | { |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 1013 | usbip_uerr("Not yet implemented\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1014 | return 0; |
| 1015 | } |
| 1016 | |
| 1017 | |
| 1018 | #ifdef CONFIG_PM |
| 1019 | |
| 1020 | /* FIXME: suspend/resume */ |
| 1021 | static int vhci_bus_suspend(struct usb_hcd *hcd) |
| 1022 | { |
| 1023 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); |
| 1024 | |
| 1025 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); |
| 1026 | |
| 1027 | spin_lock_irq(&vhci->lock); |
| 1028 | /* vhci->rh_state = DUMMY_RH_SUSPENDED; |
| 1029 | * set_link_state(vhci); */ |
| 1030 | hcd->state = HC_STATE_SUSPENDED; |
| 1031 | spin_unlock_irq(&vhci->lock); |
| 1032 | |
| 1033 | return 0; |
| 1034 | } |
| 1035 | |
| 1036 | static int vhci_bus_resume(struct usb_hcd *hcd) |
| 1037 | { |
| 1038 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); |
| 1039 | int rc = 0; |
| 1040 | |
| 1041 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); |
| 1042 | |
| 1043 | spin_lock_irq(&vhci->lock); |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame^] | 1044 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1045 | rc = -ESHUTDOWN; |
| 1046 | } else { |
| 1047 | /* vhci->rh_state = DUMMY_RH_RUNNING; |
| 1048 | * set_link_state(vhci); |
| 1049 | * if (!list_empty(&vhci->urbp_list)) |
| 1050 | * mod_timer(&vhci->timer, jiffies); */ |
| 1051 | hcd->state = HC_STATE_RUNNING; |
| 1052 | } |
| 1053 | spin_unlock_irq(&vhci->lock); |
| 1054 | return rc; |
| 1055 | |
| 1056 | return 0; |
| 1057 | } |
| 1058 | |
| 1059 | #else |
| 1060 | |
| 1061 | #define vhci_bus_suspend NULL |
| 1062 | #define vhci_bus_resume NULL |
| 1063 | #endif |
| 1064 | |
| 1065 | |
| 1066 | |
| 1067 | static struct hc_driver vhci_hc_driver = { |
| 1068 | .description = driver_name, |
| 1069 | .product_desc = driver_desc, |
| 1070 | .hcd_priv_size = sizeof(struct vhci_hcd), |
| 1071 | |
| 1072 | .flags = HCD_USB2, |
| 1073 | |
| 1074 | .start = vhci_start, |
Ruslan Pisarev | 0051268 | 2010-03-15 17:06:44 +0200 | [diff] [blame] | 1075 | .stop = vhci_stop, |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1076 | |
| 1077 | .urb_enqueue = vhci_urb_enqueue, |
| 1078 | .urb_dequeue = vhci_urb_dequeue, |
| 1079 | |
| 1080 | .get_frame_number = vhci_get_frame_number, |
| 1081 | |
| 1082 | .hub_status_data = vhci_hub_status, |
| 1083 | .hub_control = vhci_hub_control, |
| 1084 | .bus_suspend = vhci_bus_suspend, |
| 1085 | .bus_resume = vhci_bus_resume, |
| 1086 | }; |
| 1087 | |
| 1088 | static int vhci_hcd_probe(struct platform_device *pdev) |
| 1089 | { |
| 1090 | struct usb_hcd *hcd; |
| 1091 | int ret; |
| 1092 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 1093 | usbip_uinfo("proving...\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1094 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 1095 | usbip_dbg_vhci_hc("name %s id %d\n", pdev->name, pdev->id); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1096 | |
| 1097 | /* will be removed */ |
| 1098 | if (pdev->dev.dma_mask) { |
| 1099 | dev_info(&pdev->dev, "vhci_hcd DMA not supported\n"); |
| 1100 | return -EINVAL; |
| 1101 | } |
| 1102 | |
| 1103 | /* |
| 1104 | * Allocate and initialize hcd. |
| 1105 | * Our private data is also allocated automatically. |
| 1106 | */ |
Kay Sievers | e913397 | 2008-10-30 01:59:32 +0100 | [diff] [blame] | 1107 | hcd = usb_create_hcd(&vhci_hc_driver, &pdev->dev, dev_name(&pdev->dev)); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1108 | if (!hcd) { |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 1109 | usbip_uerr("create hcd failed\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1110 | return -ENOMEM; |
| 1111 | } |
| 1112 | |
| 1113 | |
| 1114 | /* this is private data for vhci_hcd */ |
| 1115 | the_controller = hcd_to_vhci(hcd); |
| 1116 | |
| 1117 | /* |
| 1118 | * Finish generic HCD structure initialization and register. |
| 1119 | * Call the driver's reset() and start() routines. |
| 1120 | */ |
| 1121 | ret = usb_add_hcd(hcd, 0, 0); |
| 1122 | if (ret != 0) { |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 1123 | usbip_uerr("usb_add_hcd failed %d\n", ret); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1124 | usb_put_hcd(hcd); |
| 1125 | the_controller = NULL; |
| 1126 | return ret; |
| 1127 | } |
| 1128 | |
| 1129 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 1130 | usbip_dbg_vhci_hc("bye\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1131 | return 0; |
| 1132 | } |
| 1133 | |
| 1134 | |
| 1135 | static int vhci_hcd_remove(struct platform_device *pdev) |
| 1136 | { |
| 1137 | struct usb_hcd *hcd; |
| 1138 | |
| 1139 | hcd = platform_get_drvdata(pdev); |
| 1140 | if (!hcd) |
| 1141 | return 0; |
| 1142 | |
| 1143 | /* |
| 1144 | * Disconnects the root hub, |
| 1145 | * then reverses the effects of usb_add_hcd(), |
| 1146 | * invoking the HCD's stop() methods. |
| 1147 | */ |
| 1148 | usb_remove_hcd(hcd); |
| 1149 | usb_put_hcd(hcd); |
| 1150 | the_controller = NULL; |
| 1151 | |
| 1152 | |
| 1153 | return 0; |
| 1154 | } |
| 1155 | |
| 1156 | |
| 1157 | |
| 1158 | #ifdef CONFIG_PM |
| 1159 | |
| 1160 | /* what should happen for USB/IP under suspend/resume? */ |
| 1161 | static int vhci_hcd_suspend(struct platform_device *pdev, pm_message_t state) |
| 1162 | { |
| 1163 | struct usb_hcd *hcd; |
| 1164 | int rhport = 0; |
| 1165 | int connected = 0; |
| 1166 | int ret = 0; |
| 1167 | |
| 1168 | dev_dbg(&pdev->dev, "%s\n", __func__); |
| 1169 | |
| 1170 | hcd = platform_get_drvdata(pdev); |
| 1171 | |
| 1172 | spin_lock(&the_controller->lock); |
| 1173 | |
| 1174 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) |
| 1175 | if (the_controller->port_status[rhport] & |
| 1176 | USB_PORT_STAT_CONNECTION) |
| 1177 | connected += 1; |
| 1178 | |
| 1179 | spin_unlock(&the_controller->lock); |
| 1180 | |
| 1181 | if (connected > 0) { |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 1182 | usbip_uinfo("We have %d active connection%s. Do not suspend.\n", |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1183 | connected, (connected == 1 ? "" : "s")); |
| 1184 | ret = -EBUSY; |
| 1185 | } else { |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 1186 | usbip_uinfo("suspend vhci_hcd"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1187 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
| 1188 | } |
| 1189 | |
| 1190 | return ret; |
| 1191 | } |
| 1192 | |
| 1193 | static int vhci_hcd_resume(struct platform_device *pdev) |
| 1194 | { |
| 1195 | struct usb_hcd *hcd; |
| 1196 | |
| 1197 | dev_dbg(&pdev->dev, "%s\n", __func__); |
| 1198 | |
| 1199 | hcd = platform_get_drvdata(pdev); |
| 1200 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
| 1201 | usb_hcd_poll_rh_status(hcd); |
| 1202 | |
| 1203 | return 0; |
| 1204 | } |
| 1205 | |
| 1206 | #else |
| 1207 | |
| 1208 | #define vhci_hcd_suspend NULL |
| 1209 | #define vhci_hcd_resume NULL |
| 1210 | |
| 1211 | #endif |
| 1212 | |
| 1213 | |
| 1214 | static struct platform_driver vhci_driver = { |
| 1215 | .probe = vhci_hcd_probe, |
| 1216 | .remove = __devexit_p(vhci_hcd_remove), |
| 1217 | .suspend = vhci_hcd_suspend, |
| 1218 | .resume = vhci_hcd_resume, |
| 1219 | .driver = { |
| 1220 | .name = (char *) driver_name, |
| 1221 | .owner = THIS_MODULE, |
| 1222 | }, |
| 1223 | }; |
| 1224 | |
| 1225 | /*----------------------------------------------------------------------*/ |
| 1226 | |
| 1227 | /* |
| 1228 | * The VHCI 'device' is 'virtual'; not a real plug&play hardware. |
| 1229 | * We need to add this virtual device as a platform device arbitrarily: |
| 1230 | * 1. platform_device_register() |
| 1231 | */ |
| 1232 | static void the_pdev_release(struct device *dev) |
| 1233 | { |
| 1234 | return; |
| 1235 | } |
| 1236 | |
| 1237 | static struct platform_device the_pdev = { |
| 1238 | /* should be the same name as driver_name */ |
| 1239 | .name = (char *) driver_name, |
| 1240 | .id = -1, |
| 1241 | .dev = { |
| 1242 | /* .driver = &vhci_driver, */ |
| 1243 | .release = the_pdev_release, |
| 1244 | }, |
| 1245 | }; |
| 1246 | |
| 1247 | static int __init vhci_init(void) |
| 1248 | { |
| 1249 | int ret; |
| 1250 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 1251 | usbip_dbg_vhci_hc("enter\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1252 | if (usb_disabled()) |
| 1253 | return -ENODEV; |
| 1254 | |
| 1255 | printk(KERN_INFO KBUILD_MODNAME ": %s, %s\n", driver_name, |
| 1256 | DRIVER_VERSION); |
| 1257 | |
| 1258 | ret = platform_driver_register(&vhci_driver); |
| 1259 | if (ret < 0) |
| 1260 | goto err_driver_register; |
| 1261 | |
| 1262 | ret = platform_device_register(&the_pdev); |
| 1263 | if (ret < 0) |
| 1264 | goto err_platform_device_register; |
| 1265 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 1266 | usbip_dbg_vhci_hc("bye\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1267 | return ret; |
| 1268 | |
| 1269 | /* error occurred */ |
| 1270 | err_platform_device_register: |
| 1271 | platform_driver_unregister(&vhci_driver); |
| 1272 | |
| 1273 | err_driver_register: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 1274 | usbip_dbg_vhci_hc("bye\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1275 | return ret; |
| 1276 | } |
| 1277 | module_init(vhci_init); |
| 1278 | |
| 1279 | static void __exit vhci_cleanup(void) |
| 1280 | { |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 1281 | usbip_dbg_vhci_hc("enter\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1282 | |
| 1283 | platform_device_unregister(&the_pdev); |
| 1284 | platform_driver_unregister(&vhci_driver); |
| 1285 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 1286 | usbip_dbg_vhci_hc("bye\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1287 | } |
| 1288 | module_exit(vhci_cleanup); |