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 | |
matt mooney | 7aaacb4 | 2011-05-11 22:33:43 -0700 | [diff] [blame] | 20 | #include <linux/init.h> |
Bernard Blackham | 3d0a2a2 | 2012-10-22 06:45:00 +1100 | [diff] [blame] | 21 | #include <linux/file.h> |
matt mooney | 7aaacb4 | 2011-05-11 22:33:43 -0700 | [diff] [blame] | 22 | #include <linux/kernel.h> |
Arnd Bergmann | 9720b4b | 2011-03-02 00:13:05 +0100 | [diff] [blame] | 23 | #include <linux/kthread.h> |
matt mooney | 7aaacb4 | 2011-05-11 22:33:43 -0700 | [diff] [blame] | 24 | #include <linux/module.h> |
| 25 | #include <linux/platform_device.h> |
| 26 | #include <linux/slab.h> |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 27 | |
| 28 | #include "usbip_common.h" |
| 29 | #include "vhci.h" |
| 30 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 31 | #define DRIVER_AUTHOR "Takahiro Hirofuchi" |
matt mooney | 64e6242 | 2011-05-11 22:33:44 -0700 | [diff] [blame] | 32 | #define DRIVER_DESC "USB/IP 'Virtual' Host Controller (VHCI) Driver" |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 33 | |
| 34 | /* |
| 35 | * TODO |
| 36 | * - update root hub emulation |
| 37 | * - move the emulation code to userland ? |
| 38 | * porting to other operating systems |
| 39 | * minimize kernel code |
| 40 | * - add suspend/resume code |
| 41 | * - clean up everything |
| 42 | */ |
| 43 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 44 | /* See usb gadget dummy hcd */ |
| 45 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 46 | static int vhci_hub_status(struct usb_hcd *hcd, char *buff); |
| 47 | static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 48 | u16 wIndex, char *buff, u16 wLength); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 49 | static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 50 | gfp_t mem_flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 51 | static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status); |
| 52 | static int vhci_start(struct usb_hcd *vhci_hcd); |
| 53 | static void vhci_stop(struct usb_hcd *hcd); |
| 54 | static int vhci_get_frame_number(struct usb_hcd *hcd); |
| 55 | |
| 56 | static const char driver_name[] = "vhci_hcd"; |
Robert P. J. Day | f5e08ca7 | 2009-11-13 15:13:43 -0500 | [diff] [blame] | 57 | static const char driver_desc[] = "USB/IP Virtual Host Controller"; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 58 | |
| 59 | struct vhci_hcd *the_controller; |
| 60 | |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 61 | static const char * const bit_desc[] = { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 62 | "CONNECTION", /*0*/ |
| 63 | "ENABLE", /*1*/ |
| 64 | "SUSPEND", /*2*/ |
| 65 | "OVER_CURRENT", /*3*/ |
| 66 | "RESET", /*4*/ |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 67 | "R5", /*5*/ |
| 68 | "R6", /*6*/ |
| 69 | "R7", /*7*/ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 70 | "POWER", /*8*/ |
| 71 | "LOWSPEED", /*9*/ |
| 72 | "HIGHSPEED", /*10*/ |
| 73 | "PORT_TEST", /*11*/ |
| 74 | "INDICATOR", /*12*/ |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 75 | "R13", /*13*/ |
| 76 | "R14", /*14*/ |
| 77 | "R15", /*15*/ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 78 | "C_CONNECTION", /*16*/ |
| 79 | "C_ENABLE", /*17*/ |
| 80 | "C_SUSPEND", /*18*/ |
| 81 | "C_OVER_CURRENT", /*19*/ |
| 82 | "C_RESET", /*20*/ |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 83 | "R21", /*21*/ |
| 84 | "R22", /*22*/ |
| 85 | "R23", /*23*/ |
| 86 | "R24", /*24*/ |
| 87 | "R25", /*25*/ |
| 88 | "R26", /*26*/ |
| 89 | "R27", /*27*/ |
| 90 | "R28", /*28*/ |
| 91 | "R29", /*29*/ |
| 92 | "R30", /*30*/ |
| 93 | "R31", /*31*/ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 94 | }; |
| 95 | |
Márton Németh | 4a3ca2b | 2011-06-14 08:28:26 +0200 | [diff] [blame] | 96 | static void dump_port_status_diff(u32 prev_status, u32 new_status) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 97 | { |
| 98 | int i = 0; |
Márton Németh | 4a3ca2b | 2011-06-14 08:28:26 +0200 | [diff] [blame] | 99 | u32 bit = 1; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 100 | |
Márton Németh | 4a3ca2b | 2011-06-14 08:28:26 +0200 | [diff] [blame] | 101 | pr_debug("status prev -> new: %08x -> %08x\n", prev_status, new_status); |
| 102 | while (bit) { |
| 103 | u32 prev = prev_status & bit; |
| 104 | u32 new = new_status & bit; |
| 105 | char change; |
| 106 | |
| 107 | if (!prev && new) |
| 108 | change = '+'; |
| 109 | else if (prev && !new) |
| 110 | change = '-'; |
| 111 | else |
| 112 | change = ' '; |
| 113 | |
| 114 | if (prev || new) |
| 115 | pr_debug(" %c%s\n", change, bit_desc[i]); |
| 116 | bit <<= 1; |
| 117 | i++; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 118 | } |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 119 | pr_debug("\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 120 | } |
| 121 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 122 | void rh_port_connect(int rhport, enum usb_device_speed speed) |
| 123 | { |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 124 | usbip_dbg_vhci_rh("rh_port_connect %d\n", rhport); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 125 | |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 126 | spin_lock(&the_controller->lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 127 | |
| 128 | the_controller->port_status[rhport] |= USB_PORT_STAT_CONNECTION |
| 129 | | (1 << USB_PORT_FEAT_C_CONNECTION); |
| 130 | |
| 131 | switch (speed) { |
| 132 | case USB_SPEED_HIGH: |
| 133 | the_controller->port_status[rhport] |= USB_PORT_STAT_HIGH_SPEED; |
| 134 | break; |
| 135 | case USB_SPEED_LOW: |
| 136 | the_controller->port_status[rhport] |= USB_PORT_STAT_LOW_SPEED; |
| 137 | break; |
| 138 | default: |
| 139 | break; |
| 140 | } |
| 141 | |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 142 | spin_unlock(&the_controller->lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 143 | |
| 144 | usb_hcd_poll_rh_status(vhci_to_hcd(the_controller)); |
| 145 | } |
| 146 | |
Bart Westgeest | 20960fa | 2012-10-10 13:34:26 -0400 | [diff] [blame] | 147 | static void rh_port_disconnect(int rhport) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 148 | { |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 149 | usbip_dbg_vhci_rh("rh_port_disconnect %d\n", rhport); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 150 | |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 151 | spin_lock(&the_controller->lock); |
Bart Westgeest | c7f0089 | 2012-10-10 13:34:27 -0400 | [diff] [blame] | 152 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 153 | the_controller->port_status[rhport] &= ~USB_PORT_STAT_CONNECTION; |
| 154 | the_controller->port_status[rhport] |= |
| 155 | (1 << USB_PORT_FEAT_C_CONNECTION); |
| 156 | |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 157 | spin_unlock(&the_controller->lock); |
Max Vozeler | 0c9a32f | 2010-09-21 17:31:40 +0200 | [diff] [blame] | 158 | usb_hcd_poll_rh_status(vhci_to_hcd(the_controller)); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 159 | } |
| 160 | |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 161 | #define PORT_C_MASK \ |
| 162 | ((USB_PORT_STAT_C_CONNECTION \ |
| 163 | | USB_PORT_STAT_C_ENABLE \ |
| 164 | | USB_PORT_STAT_C_SUSPEND \ |
| 165 | | USB_PORT_STAT_C_OVERCURRENT \ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 166 | | USB_PORT_STAT_C_RESET) << 16) |
| 167 | |
| 168 | /* |
Bart Westgeest | 7489301 | 2012-06-13 15:37:18 -0400 | [diff] [blame] | 169 | * Returns 0 if the status hasn't changed, or the number of bytes in buf. |
| 170 | * Ports are 0-indexed from the HCD point of view, |
| 171 | * and 1-indexed from the USB core pointer of view. |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 172 | * |
| 173 | * @buf: a bitmap to show which port status has been changed. |
Bart Westgeest | 7489301 | 2012-06-13 15:37:18 -0400 | [diff] [blame] | 174 | * bit 0: reserved |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 175 | * bit 1: the status of port 0 has been changed. |
| 176 | * bit 2: the status of port 1 has been changed. |
| 177 | * ... |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 178 | */ |
| 179 | static int vhci_hub_status(struct usb_hcd *hcd, char *buf) |
| 180 | { |
| 181 | struct vhci_hcd *vhci; |
Bart Westgeest | 7489301 | 2012-06-13 15:37:18 -0400 | [diff] [blame] | 182 | int retval; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 183 | int rhport; |
| 184 | int changed = 0; |
| 185 | |
Bart Westgeest | 7489301 | 2012-06-13 15:37:18 -0400 | [diff] [blame] | 186 | retval = DIV_ROUND_UP(VHCI_NPORTS + 1, 8); |
| 187 | memset(buf, 0, retval); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 188 | |
| 189 | vhci = hcd_to_vhci(hcd); |
| 190 | |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 191 | spin_lock(&vhci->lock); |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 192 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
Bart Westgeest | 7489301 | 2012-06-13 15:37:18 -0400 | [diff] [blame] | 193 | usbip_dbg_vhci_rh("hw accessible flag not on?\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 194 | goto done; |
| 195 | } |
| 196 | |
| 197 | /* check pseudo status register for each port */ |
| 198 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) { |
| 199 | if ((vhci->port_status[rhport] & PORT_C_MASK)) { |
| 200 | /* The status of a port has been changed, */ |
Bart Westgeest | 7489301 | 2012-06-13 15:37:18 -0400 | [diff] [blame] | 201 | usbip_dbg_vhci_rh("port %d status changed\n", rhport); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 202 | |
Bart Westgeest | 7489301 | 2012-06-13 15:37:18 -0400 | [diff] [blame] | 203 | buf[(rhport + 1) / 8] |= 1 << (rhport + 1) % 8; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 204 | changed = 1; |
| 205 | } |
| 206 | } |
| 207 | |
navin patidar | 107f04b | 2012-09-06 16:49:50 +0530 | [diff] [blame] | 208 | if ((hcd->state == HC_STATE_SUSPENDED) && (changed == 1)) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 209 | usb_hcd_resume_root_hub(hcd); |
| 210 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 211 | done: |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 212 | spin_unlock(&vhci->lock); |
Bart Westgeest | 7489301 | 2012-06-13 15:37:18 -0400 | [diff] [blame] | 213 | return changed ? retval : 0; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 214 | } |
| 215 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 216 | static inline void hub_descriptor(struct usb_hub_descriptor *desc) |
| 217 | { |
| 218 | memset(desc, 0, sizeof(*desc)); |
| 219 | desc->bDescriptorType = 0x29; |
| 220 | desc->bDescLength = 9; |
Teodora Baluta | d0306a5 | 2013-11-04 13:12:12 +0200 | [diff] [blame] | 221 | desc->wHubCharacteristics = (__constant_cpu_to_le16(0x0001)); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 222 | desc->bNbrPorts = VHCI_NPORTS; |
John Youn | dbe79bb | 2001-09-17 00:00:00 -0700 | [diff] [blame] | 223 | desc->u.hs.DeviceRemovable[0] = 0xff; |
| 224 | desc->u.hs.DeviceRemovable[1] = 0xff; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 225 | } |
| 226 | |
| 227 | static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, |
| 228 | u16 wIndex, char *buf, u16 wLength) |
| 229 | { |
| 230 | struct vhci_hcd *dum; |
| 231 | int retval = 0; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 232 | int rhport; |
| 233 | |
| 234 | u32 prev_port_status[VHCI_NPORTS]; |
| 235 | |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 236 | if (!HCD_HW_ACCESSIBLE(hcd)) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 237 | return -ETIMEDOUT; |
| 238 | |
| 239 | /* |
| 240 | * NOTE: |
| 241 | * wIndex shows the port number and begins from 1. |
| 242 | */ |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 243 | usbip_dbg_vhci_rh("typeReq %x wValue %x wIndex %x\n", typeReq, wValue, |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 244 | wIndex); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 245 | if (wIndex > VHCI_NPORTS) |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 246 | pr_err("invalid port number %d\n", wIndex); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 247 | rhport = ((__u8)(wIndex & 0x00ff)) - 1; |
| 248 | |
| 249 | dum = hcd_to_vhci(hcd); |
| 250 | |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 251 | spin_lock(&dum->lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 252 | |
| 253 | /* store old status and compare now and old later */ |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 254 | if (usbip_dbg_flag_vhci_rh) { |
Márton Németh | 6f480bf | 2011-06-13 23:30:09 +0200 | [diff] [blame] | 255 | memcpy(prev_port_status, dum->port_status, |
| 256 | sizeof(prev_port_status)); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 257 | } |
| 258 | |
| 259 | switch (typeReq) { |
| 260 | case ClearHubFeature: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 261 | usbip_dbg_vhci_rh(" ClearHubFeature\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 262 | break; |
| 263 | case ClearPortFeature: |
| 264 | switch (wValue) { |
| 265 | case USB_PORT_FEAT_SUSPEND: |
| 266 | if (dum->port_status[rhport] & USB_PORT_STAT_SUSPEND) { |
| 267 | /* 20msec signaling */ |
| 268 | dum->resuming = 1; |
| 269 | dum->re_timeout = |
| 270 | jiffies + msecs_to_jiffies(20); |
| 271 | } |
| 272 | break; |
| 273 | case USB_PORT_FEAT_POWER: |
Cédric Cabessa | 7923a65 | 2014-03-19 23:04:57 +0100 | [diff] [blame] | 274 | usbip_dbg_vhci_rh( |
| 275 | " ClearPortFeature: USB_PORT_FEAT_POWER\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 276 | dum->port_status[rhport] = 0; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 277 | dum->resuming = 0; |
| 278 | break; |
| 279 | case USB_PORT_FEAT_C_RESET: |
Cédric Cabessa | 7923a65 | 2014-03-19 23:04:57 +0100 | [diff] [blame] | 280 | usbip_dbg_vhci_rh( |
| 281 | " ClearPortFeature: USB_PORT_FEAT_C_RESET\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 282 | switch (dum->vdev[rhport].speed) { |
| 283 | case USB_SPEED_HIGH: |
| 284 | dum->port_status[rhport] |= |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 285 | USB_PORT_STAT_HIGH_SPEED; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 286 | break; |
| 287 | case USB_SPEED_LOW: |
| 288 | dum->port_status[rhport] |= |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 289 | USB_PORT_STAT_LOW_SPEED; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 290 | break; |
| 291 | default: |
| 292 | break; |
| 293 | } |
| 294 | default: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 295 | usbip_dbg_vhci_rh(" ClearPortFeature: default %x\n", |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 296 | wValue); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 297 | dum->port_status[rhport] &= ~(1 << wValue); |
matt mooney | 49aecef | 2011-05-06 03:47:54 -0700 | [diff] [blame] | 298 | break; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 299 | } |
| 300 | break; |
| 301 | case GetHubDescriptor: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 302 | usbip_dbg_vhci_rh(" GetHubDescriptor\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 303 | hub_descriptor((struct usb_hub_descriptor *) buf); |
| 304 | break; |
| 305 | case GetHubStatus: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 306 | usbip_dbg_vhci_rh(" GetHubStatus\n"); |
Alexey Tulia | a06a24d | 2014-06-13 11:35:13 +0300 | [diff] [blame] | 307 | *(__le32 *) buf = cpu_to_le32(0); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 308 | break; |
| 309 | case GetPortStatus: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 310 | usbip_dbg_vhci_rh(" GetPortStatus port %x\n", wIndex); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 311 | if (wIndex > VHCI_NPORTS || wIndex < 1) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 312 | pr_err("invalid port number %d\n", wIndex); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 313 | retval = -EPIPE; |
| 314 | } |
| 315 | |
Bart Westgeest | c7f0089 | 2012-10-10 13:34:27 -0400 | [diff] [blame] | 316 | /* we do not care about resume. */ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 317 | |
| 318 | /* whoever resets or resumes must GetPortStatus to |
| 319 | * complete it!! |
Bart Westgeest | c7f0089 | 2012-10-10 13:34:27 -0400 | [diff] [blame] | 320 | */ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 321 | if (dum->resuming && time_after(jiffies, dum->re_timeout)) { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 322 | dum->port_status[rhport] |= |
matt mooney | 8735276 | 2011-05-19 21:36:56 -0700 | [diff] [blame] | 323 | (1 << USB_PORT_FEAT_C_SUSPEND); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 324 | dum->port_status[rhport] &= |
matt mooney | 8735276 | 2011-05-19 21:36:56 -0700 | [diff] [blame] | 325 | ~(1 << USB_PORT_FEAT_SUSPEND); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 326 | dum->resuming = 0; |
| 327 | dum->re_timeout = 0; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 328 | } |
| 329 | |
| 330 | if ((dum->port_status[rhport] & (1 << USB_PORT_FEAT_RESET)) != |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 331 | 0 && time_after(jiffies, dum->re_timeout)) { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 332 | dum->port_status[rhport] |= |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 333 | (1 << USB_PORT_FEAT_C_RESET); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 334 | dum->port_status[rhport] &= |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 335 | ~(1 << USB_PORT_FEAT_RESET); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 336 | dum->re_timeout = 0; |
| 337 | |
| 338 | if (dum->vdev[rhport].ud.status == |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 339 | VDEV_ST_NOTASSIGNED) { |
Cédric Cabessa | 7923a65 | 2014-03-19 23:04:57 +0100 | [diff] [blame] | 340 | usbip_dbg_vhci_rh( |
| 341 | " enable rhport %d (status %u)\n", |
| 342 | rhport, |
| 343 | dum->vdev[rhport].ud.status); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 344 | dum->port_status[rhport] |= |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 345 | USB_PORT_STAT_ENABLE; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 346 | } |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 347 | } |
Teodora Baluta | d0306a5 | 2013-11-04 13:12:12 +0200 | [diff] [blame] | 348 | ((__le16 *) buf)[0] = cpu_to_le16(dum->port_status[rhport]); |
Cédric Cabessa | 7923a65 | 2014-03-19 23:04:57 +0100 | [diff] [blame] | 349 | ((__le16 *) buf)[1] = |
| 350 | cpu_to_le16(dum->port_status[rhport] >> 16); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 351 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 352 | usbip_dbg_vhci_rh(" GetPortStatus bye %x %x\n", ((u16 *)buf)[0], |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 353 | ((u16 *)buf)[1]); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 354 | break; |
| 355 | case SetHubFeature: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 356 | usbip_dbg_vhci_rh(" SetHubFeature\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 357 | retval = -EPIPE; |
| 358 | break; |
| 359 | case SetPortFeature: |
| 360 | switch (wValue) { |
| 361 | case USB_PORT_FEAT_SUSPEND: |
Cédric Cabessa | 7923a65 | 2014-03-19 23:04:57 +0100 | [diff] [blame] | 362 | usbip_dbg_vhci_rh( |
| 363 | " SetPortFeature: USB_PORT_FEAT_SUSPEND\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 364 | break; |
| 365 | case USB_PORT_FEAT_RESET: |
Cédric Cabessa | 7923a65 | 2014-03-19 23:04:57 +0100 | [diff] [blame] | 366 | usbip_dbg_vhci_rh( |
| 367 | " SetPortFeature: USB_PORT_FEAT_RESET\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 368 | /* if it's already running, disconnect first */ |
| 369 | if (dum->port_status[rhport] & USB_PORT_STAT_ENABLE) { |
| 370 | dum->port_status[rhport] &= |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 371 | ~(USB_PORT_STAT_ENABLE | |
| 372 | USB_PORT_STAT_LOW_SPEED | |
| 373 | USB_PORT_STAT_HIGH_SPEED); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 374 | /* FIXME test that code path! */ |
| 375 | } |
| 376 | /* 50msec reset signaling */ |
| 377 | dum->re_timeout = jiffies + msecs_to_jiffies(50); |
| 378 | |
| 379 | /* FALLTHROUGH */ |
| 380 | default: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 381 | usbip_dbg_vhci_rh(" SetPortFeature: default %d\n", |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 382 | wValue); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 383 | dum->port_status[rhport] |= (1 << wValue); |
matt mooney | 49aecef | 2011-05-06 03:47:54 -0700 | [diff] [blame] | 384 | break; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 385 | } |
| 386 | break; |
| 387 | |
| 388 | default: |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 389 | pr_err("default: no such request\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 390 | |
| 391 | /* "protocol stall" on error */ |
| 392 | retval = -EPIPE; |
| 393 | } |
| 394 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 395 | if (usbip_dbg_flag_vhci_rh) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 396 | pr_debug("port %d\n", rhport); |
Márton Németh | bfb4ce2 | 2011-06-13 23:47:39 +0200 | [diff] [blame] | 397 | /* Only dump valid port status */ |
| 398 | if (rhport >= 0) { |
Márton Németh | 4a3ca2b | 2011-06-14 08:28:26 +0200 | [diff] [blame] | 399 | dump_port_status_diff(prev_port_status[rhport], |
| 400 | dum->port_status[rhport]); |
Márton Németh | bfb4ce2 | 2011-06-13 23:47:39 +0200 | [diff] [blame] | 401 | } |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 402 | } |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 403 | usbip_dbg_vhci_rh(" bye\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 404 | |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 405 | spin_unlock(&dum->lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 406 | |
| 407 | return retval; |
| 408 | } |
| 409 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 410 | static struct vhci_device *get_vdev(struct usb_device *udev) |
| 411 | { |
| 412 | int i; |
| 413 | |
| 414 | if (!udev) |
| 415 | return NULL; |
| 416 | |
| 417 | for (i = 0; i < VHCI_NPORTS; i++) |
| 418 | if (the_controller->vdev[i].udev == udev) |
| 419 | return port_to_vdev(i); |
| 420 | |
| 421 | return NULL; |
| 422 | } |
| 423 | |
| 424 | static void vhci_tx_urb(struct urb *urb) |
| 425 | { |
| 426 | struct vhci_device *vdev = get_vdev(urb->dev); |
| 427 | struct vhci_priv *priv; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 428 | |
| 429 | if (!vdev) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 430 | pr_err("could not get virtual device"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 431 | return; |
| 432 | } |
| 433 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 434 | priv = kzalloc(sizeof(struct vhci_priv), GFP_ATOMIC); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 435 | if (!priv) { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 436 | usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC); |
| 437 | return; |
| 438 | } |
| 439 | |
Joe Perches | 78110bb | 2013-02-11 09:41:29 -0800 | [diff] [blame] | 440 | spin_lock(&vdev->priv_lock); |
| 441 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 442 | priv->seqnum = atomic_inc_return(&the_controller->seqnum); |
| 443 | if (priv->seqnum == 0xffff) |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 444 | dev_info(&urb->dev->dev, "seqnum max\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 445 | |
| 446 | priv->vdev = vdev; |
| 447 | priv->urb = urb; |
| 448 | |
| 449 | urb->hcpriv = (void *) priv; |
| 450 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 451 | list_add_tail(&priv->list, &vdev->priv_tx); |
| 452 | |
| 453 | wake_up(&vdev->waitq_tx); |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 454 | spin_unlock(&vdev->priv_lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 455 | } |
| 456 | |
| 457 | static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, |
| 458 | gfp_t mem_flags) |
| 459 | { |
| 460 | struct device *dev = &urb->dev->dev; |
| 461 | int ret = 0; |
Max Vozeler | 6d21215 | 2011-01-12 15:02:02 +0200 | [diff] [blame] | 462 | struct vhci_device *vdev; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 463 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 464 | usbip_dbg_vhci_hc("enter, usb_hcd %p urb %p mem_flags %d\n", |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 465 | hcd, urb, mem_flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 466 | |
| 467 | /* patch to usb_sg_init() is in 2.5.60 */ |
| 468 | BUG_ON(!urb->transfer_buffer && urb->transfer_buffer_length); |
| 469 | |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 470 | spin_lock(&the_controller->lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 471 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 472 | if (urb->status != -EINPROGRESS) { |
| 473 | dev_err(dev, "URB already unlinked!, status %d\n", urb->status); |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 474 | spin_unlock(&the_controller->lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 475 | return urb->status; |
| 476 | } |
| 477 | |
Max Vozeler | 01446ef | 2011-01-12 15:02:05 +0200 | [diff] [blame] | 478 | vdev = port_to_vdev(urb->dev->portnum-1); |
Max Vozeler | 6d21215 | 2011-01-12 15:02:02 +0200 | [diff] [blame] | 479 | |
| 480 | /* refuse enqueue for dead connection */ |
| 481 | spin_lock(&vdev->ud.lock); |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 482 | if (vdev->ud.status == VDEV_ST_NULL || |
| 483 | vdev->ud.status == VDEV_ST_ERROR) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 484 | dev_err(dev, "enqueue for inactive port %d\n", vdev->rhport); |
Max Vozeler | 6d21215 | 2011-01-12 15:02:02 +0200 | [diff] [blame] | 485 | spin_unlock(&vdev->ud.lock); |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 486 | spin_unlock(&the_controller->lock); |
Max Vozeler | 6d21215 | 2011-01-12 15:02:02 +0200 | [diff] [blame] | 487 | return -ENODEV; |
| 488 | } |
| 489 | spin_unlock(&vdev->ud.lock); |
| 490 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 491 | ret = usb_hcd_link_urb_to_ep(hcd, urb); |
| 492 | if (ret) |
| 493 | goto no_need_unlink; |
| 494 | |
| 495 | /* |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 496 | * The enumeration process is as follows; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 497 | * |
| 498 | * 1. Get_Descriptor request to DevAddrs(0) EndPoint(0) |
| 499 | * to get max packet length of default pipe |
| 500 | * |
| 501 | * 2. Set_Address request to DevAddr(0) EndPoint(0) |
| 502 | * |
| 503 | */ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 504 | if (usb_pipedevice(urb->pipe) == 0) { |
| 505 | __u8 type = usb_pipetype(urb->pipe); |
| 506 | struct usb_ctrlrequest *ctrlreq = |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 507 | (struct usb_ctrlrequest *) urb->setup_packet; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 508 | |
| 509 | if (type != PIPE_CONTROL || !ctrlreq) { |
| 510 | dev_err(dev, "invalid request to devnum 0\n"); |
Shan Wei | a7cd582 | 2009-07-24 16:57:35 +0800 | [diff] [blame] | 511 | ret = -EINVAL; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 512 | goto no_need_xmit; |
| 513 | } |
| 514 | |
| 515 | switch (ctrlreq->bRequest) { |
| 516 | case USB_REQ_SET_ADDRESS: |
| 517 | /* set_address may come when a device is reset */ |
| 518 | dev_info(dev, "SetAddress Request (%d) to port %d\n", |
| 519 | ctrlreq->wValue, vdev->rhport); |
| 520 | |
Markus Elfring | 03f3df8 | 2014-11-21 16:33:18 +0100 | [diff] [blame] | 521 | usb_put_dev(vdev->udev); |
Max Vozeler | 7606ee8 | 2011-01-12 15:02:00 +0200 | [diff] [blame] | 522 | vdev->udev = usb_get_dev(urb->dev); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 523 | |
| 524 | spin_lock(&vdev->ud.lock); |
| 525 | vdev->ud.status = VDEV_ST_USED; |
| 526 | spin_unlock(&vdev->ud.lock); |
| 527 | |
| 528 | if (urb->status == -EINPROGRESS) { |
| 529 | /* This request is successfully completed. */ |
| 530 | /* If not -EINPROGRESS, possibly unlinked. */ |
| 531 | urb->status = 0; |
| 532 | } |
| 533 | |
| 534 | goto no_need_xmit; |
| 535 | |
| 536 | case USB_REQ_GET_DESCRIPTOR: |
Teodora Baluta | d0306a5 | 2013-11-04 13:12:12 +0200 | [diff] [blame] | 537 | if (ctrlreq->wValue == cpu_to_le16(USB_DT_DEVICE << 8)) |
Cédric Cabessa | 7923a65 | 2014-03-19 23:04:57 +0100 | [diff] [blame] | 538 | usbip_dbg_vhci_hc( |
| 539 | "Not yet?:Get_Descriptor to device 0 (get max pipe size)\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 540 | |
Markus Elfring | 03f3df8 | 2014-11-21 16:33:18 +0100 | [diff] [blame] | 541 | usb_put_dev(vdev->udev); |
Max Vozeler | 7606ee8 | 2011-01-12 15:02:00 +0200 | [diff] [blame] | 542 | vdev->udev = usb_get_dev(urb->dev); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 543 | goto out; |
| 544 | |
| 545 | default: |
| 546 | /* NOT REACHED */ |
Cédric Cabessa | 7923a65 | 2014-03-19 23:04:57 +0100 | [diff] [blame] | 547 | dev_err(dev, |
| 548 | "invalid request to devnum 0 bRequest %u, wValue %u\n", |
| 549 | ctrlreq->bRequest, |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 550 | ctrlreq->wValue); |
| 551 | ret = -EINVAL; |
| 552 | goto no_need_xmit; |
| 553 | } |
| 554 | |
| 555 | } |
| 556 | |
| 557 | out: |
| 558 | vhci_tx_urb(urb); |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 559 | spin_unlock(&the_controller->lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 560 | |
| 561 | return 0; |
| 562 | |
| 563 | no_need_xmit: |
| 564 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
| 565 | no_need_unlink: |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 566 | spin_unlock(&the_controller->lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 567 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, urb->status); |
Shan Wei | a7cd582 | 2009-07-24 16:57:35 +0800 | [diff] [blame] | 568 | return ret; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 569 | } |
| 570 | |
| 571 | /* |
| 572 | * vhci_rx gives back the urb after receiving the reply of the urb. If an |
| 573 | * unlink pdu is sent or not, vhci_rx receives a normal return pdu and gives |
| 574 | * back its urb. For the driver unlinking the urb, the content of the urb is |
| 575 | * not important, but the calling to its completion handler is important; the |
| 576 | * completion of unlinking is notified by the completion handler. |
| 577 | * |
| 578 | * |
| 579 | * CLIENT SIDE |
| 580 | * |
| 581 | * - When vhci_hcd receives RET_SUBMIT, |
| 582 | * |
| 583 | * - case 1a). the urb of the pdu is not unlinking. |
| 584 | * - normal case |
| 585 | * => just give back the urb |
| 586 | * |
| 587 | * - case 1b). the urb of the pdu is unlinking. |
| 588 | * - usbip.ko will return a reply of the unlinking request. |
| 589 | * => give back the urb now and go to case 2b). |
| 590 | * |
| 591 | * - When vhci_hcd receives RET_UNLINK, |
| 592 | * |
| 593 | * - case 2a). a submit request is still pending in vhci_hcd. |
| 594 | * - urb was really pending in usbip.ko and urb_unlink_urb() was |
| 595 | * completed there. |
| 596 | * => free a pending submit request |
| 597 | * => notify unlink completeness by giving back the urb |
| 598 | * |
| 599 | * - case 2b). a submit request is *not* pending in vhci_hcd. |
| 600 | * - urb was already given back to the core driver. |
| 601 | * => do not give back the urb |
| 602 | * |
| 603 | * |
| 604 | * SERVER SIDE |
| 605 | * |
| 606 | * - When usbip receives CMD_UNLINK, |
| 607 | * |
| 608 | * - case 3a). the urb of the unlink request is now in submission. |
| 609 | * => do usb_unlink_urb(). |
| 610 | * => after the unlink is completed, send RET_UNLINK. |
| 611 | * |
| 612 | * - case 3b). the urb of the unlink request is not in submission. |
| 613 | * - may be already completed or never be received |
| 614 | * => send RET_UNLINK |
| 615 | * |
| 616 | */ |
| 617 | static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
| 618 | { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 619 | struct vhci_priv *priv; |
| 620 | struct vhci_device *vdev; |
| 621 | |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 622 | pr_info("dequeue a urb %p\n", urb); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 623 | |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 624 | spin_lock(&the_controller->lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 625 | |
| 626 | priv = urb->hcpriv; |
| 627 | if (!priv) { |
| 628 | /* URB was never linked! or will be soon given back by |
| 629 | * vhci_rx. */ |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 630 | spin_unlock(&the_controller->lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 631 | return 0; |
| 632 | } |
| 633 | |
| 634 | { |
| 635 | int ret = 0; |
Pawel Lebioda | 3eed8c0 | 2014-05-14 19:20:27 +0200 | [diff] [blame] | 636 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 637 | ret = usb_hcd_check_unlink_urb(hcd, urb, status); |
| 638 | if (ret) { |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 639 | spin_unlock(&the_controller->lock); |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 640 | return ret; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 641 | } |
| 642 | } |
| 643 | |
| 644 | /* send unlink request here? */ |
| 645 | vdev = priv->vdev; |
| 646 | |
| 647 | if (!vdev->ud.tcp_socket) { |
| 648 | /* tcp connection is closed */ |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 649 | spin_lock(&vdev->priv_lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 650 | |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 651 | pr_info("device %p seems to be disconnected\n", vdev); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 652 | list_del(&priv->list); |
| 653 | kfree(priv); |
| 654 | urb->hcpriv = NULL; |
| 655 | |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 656 | spin_unlock(&vdev->priv_lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 657 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 658 | /* |
| 659 | * If tcp connection is alive, we have sent CMD_UNLINK. |
| 660 | * vhci_rx will receive RET_UNLINK and give back the URB. |
| 661 | * Otherwise, we give back it here. |
| 662 | */ |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 663 | pr_info("gives back urb %p\n", urb); |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 664 | |
| 665 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
| 666 | |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 667 | spin_unlock(&the_controller->lock); |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 668 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 669 | urb->status); |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 670 | spin_lock(&the_controller->lock); |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 671 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 672 | } else { |
| 673 | /* tcp connection is alive */ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 674 | struct vhci_unlink *unlink; |
| 675 | |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 676 | spin_lock(&vdev->priv_lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 677 | |
| 678 | /* setup CMD_UNLINK pdu */ |
| 679 | unlink = kzalloc(sizeof(struct vhci_unlink), GFP_ATOMIC); |
| 680 | if (!unlink) { |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 681 | spin_unlock(&vdev->priv_lock); |
| 682 | spin_unlock(&the_controller->lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 683 | usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC); |
| 684 | return -ENOMEM; |
| 685 | } |
| 686 | |
| 687 | unlink->seqnum = atomic_inc_return(&the_controller->seqnum); |
| 688 | if (unlink->seqnum == 0xffff) |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 689 | pr_info("seqnum max\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 690 | |
| 691 | unlink->unlink_seqnum = priv->seqnum; |
| 692 | |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 693 | pr_info("device %p seems to be still connected\n", vdev); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 694 | |
| 695 | /* send cmd_unlink and try to cancel the pending URB in the |
| 696 | * peer */ |
| 697 | list_add_tail(&unlink->list, &vdev->unlink_tx); |
| 698 | wake_up(&vdev->waitq_tx); |
| 699 | |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 700 | spin_unlock(&vdev->priv_lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 701 | } |
| 702 | |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 703 | spin_unlock(&the_controller->lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 704 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 705 | usbip_dbg_vhci_hc("leave\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 706 | return 0; |
| 707 | } |
| 708 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 709 | static void vhci_device_unlink_cleanup(struct vhci_device *vdev) |
| 710 | { |
| 711 | struct vhci_unlink *unlink, *tmp; |
| 712 | |
Bernard Blackham | 236742d | 2012-09-06 20:25:04 +1000 | [diff] [blame] | 713 | spin_lock(&the_controller->lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 714 | spin_lock(&vdev->priv_lock); |
| 715 | |
| 716 | list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 717 | pr_info("unlink cleanup tx %lu\n", unlink->unlink_seqnum); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 718 | list_del(&unlink->list); |
| 719 | kfree(unlink); |
| 720 | } |
| 721 | |
Bernard Blackham | 236742d | 2012-09-06 20:25:04 +1000 | [diff] [blame] | 722 | while (!list_empty(&vdev->unlink_rx)) { |
Max Vozeler | b92a5e2 | 2011-01-12 15:02:01 +0200 | [diff] [blame] | 723 | struct urb *urb; |
| 724 | |
Bernard Blackham | 236742d | 2012-09-06 20:25:04 +1000 | [diff] [blame] | 725 | unlink = list_first_entry(&vdev->unlink_rx, struct vhci_unlink, |
| 726 | list); |
| 727 | |
Max Vozeler | b92a5e2 | 2011-01-12 15:02:01 +0200 | [diff] [blame] | 728 | /* give back URB of unanswered unlink request */ |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 729 | pr_info("unlink cleanup rx %lu\n", unlink->unlink_seqnum); |
Max Vozeler | b92a5e2 | 2011-01-12 15:02:01 +0200 | [diff] [blame] | 730 | |
| 731 | urb = pickup_urb_and_free_priv(vdev, unlink->unlink_seqnum); |
| 732 | if (!urb) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 733 | pr_info("the urb (seqnum %lu) was already given back\n", |
| 734 | unlink->unlink_seqnum); |
Max Vozeler | b92a5e2 | 2011-01-12 15:02:01 +0200 | [diff] [blame] | 735 | list_del(&unlink->list); |
| 736 | kfree(unlink); |
| 737 | continue; |
| 738 | } |
| 739 | |
| 740 | urb->status = -ENODEV; |
| 741 | |
Max Vozeler | b92a5e2 | 2011-01-12 15:02:01 +0200 | [diff] [blame] | 742 | usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb); |
Bernard Blackham | 236742d | 2012-09-06 20:25:04 +1000 | [diff] [blame] | 743 | |
| 744 | list_del(&unlink->list); |
| 745 | |
| 746 | spin_unlock(&vdev->priv_lock); |
Max Vozeler | b92a5e2 | 2011-01-12 15:02:01 +0200 | [diff] [blame] | 747 | spin_unlock(&the_controller->lock); |
| 748 | |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 749 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, |
| 750 | urb->status); |
Max Vozeler | b92a5e2 | 2011-01-12 15:02:01 +0200 | [diff] [blame] | 751 | |
Bernard Blackham | 236742d | 2012-09-06 20:25:04 +1000 | [diff] [blame] | 752 | spin_lock(&the_controller->lock); |
| 753 | spin_lock(&vdev->priv_lock); |
| 754 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 755 | kfree(unlink); |
| 756 | } |
| 757 | |
| 758 | spin_unlock(&vdev->priv_lock); |
Bernard Blackham | 236742d | 2012-09-06 20:25:04 +1000 | [diff] [blame] | 759 | spin_unlock(&the_controller->lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 760 | } |
| 761 | |
| 762 | /* |
| 763 | * The important thing is that only one context begins cleanup. |
| 764 | * This is why error handling and cleanup become simple. |
| 765 | * We do not want to consider race condition as possible. |
| 766 | */ |
| 767 | static void vhci_shutdown_connection(struct usbip_device *ud) |
| 768 | { |
| 769 | struct vhci_device *vdev = container_of(ud, struct vhci_device, ud); |
| 770 | |
| 771 | /* need this? see stub_dev.c */ |
| 772 | if (ud->tcp_socket) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 773 | pr_debug("shutdown tcp_socket %p\n", ud->tcp_socket); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 774 | kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR); |
| 775 | } |
| 776 | |
Bart Westgeest | c7f0089 | 2012-10-10 13:34:27 -0400 | [diff] [blame] | 777 | /* kill threads related to this sdev */ |
navin | cbf7d12 | 2012-09-19 17:04:51 +0530 | [diff] [blame] | 778 | if (vdev->ud.tcp_rx) { |
Oleg Nesterov | ba46ce3 | 2012-03-13 19:07:18 +0100 | [diff] [blame] | 779 | kthread_stop_put(vdev->ud.tcp_rx); |
navin | cbf7d12 | 2012-09-19 17:04:51 +0530 | [diff] [blame] | 780 | vdev->ud.tcp_rx = NULL; |
| 781 | } |
| 782 | if (vdev->ud.tcp_tx) { |
Oleg Nesterov | ba46ce3 | 2012-03-13 19:07:18 +0100 | [diff] [blame] | 783 | kthread_stop_put(vdev->ud.tcp_tx); |
navin | cbf7d12 | 2012-09-19 17:04:51 +0530 | [diff] [blame] | 784 | vdev->ud.tcp_tx = NULL; |
| 785 | } |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 786 | pr_info("stop threads\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 787 | |
| 788 | /* active connection is closed */ |
Bernard Blackham | 3d0a2a2 | 2012-10-22 06:45:00 +1100 | [diff] [blame] | 789 | if (vdev->ud.tcp_socket) { |
Al Viro | 964ea96 | 2014-03-05 20:33:08 -0500 | [diff] [blame] | 790 | sockfd_put(vdev->ud.tcp_socket); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 791 | vdev->ud.tcp_socket = NULL; |
| 792 | } |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 793 | pr_info("release socket\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 794 | |
| 795 | vhci_device_unlink_cleanup(vdev); |
| 796 | |
| 797 | /* |
| 798 | * rh_port_disconnect() is a trigger of ... |
| 799 | * usb_disable_device(): |
| 800 | * disable all the endpoints for a USB device. |
| 801 | * usb_disable_endpoint(): |
| 802 | * disable endpoints. pending urbs are unlinked(dequeued). |
| 803 | * |
| 804 | * NOTE: After calling rh_port_disconnect(), the USB device drivers of a |
Justin P. Mattock | 4ec2601 | 2012-08-06 08:00:27 -0700 | [diff] [blame] | 805 | * detached device should release used urbs in a cleanup function (i.e. |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 806 | * xxx_disconnect()). Therefore, vhci_hcd does not need to release |
| 807 | * pushed urbs and their private data in this function. |
| 808 | * |
Justin P. Mattock | 4ec2601 | 2012-08-06 08:00:27 -0700 | [diff] [blame] | 809 | * NOTE: vhci_dequeue() must be considered carefully. When shutting down |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 810 | * a connection, vhci_shutdown_connection() expects vhci_dequeue() |
| 811 | * gives back pushed urbs and frees their private data by request of |
| 812 | * the cleanup function of a USB driver. When unlinking a urb with an |
| 813 | * active connection, vhci_dequeue() does not give back the urb which |
| 814 | * is actually given back by vhci_rx after receiving its return pdu. |
| 815 | * |
| 816 | */ |
| 817 | rh_port_disconnect(vdev->rhport); |
| 818 | |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 819 | pr_info("disconnect device\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 820 | } |
| 821 | |
| 822 | |
| 823 | static void vhci_device_reset(struct usbip_device *ud) |
| 824 | { |
| 825 | struct vhci_device *vdev = container_of(ud, struct vhci_device, ud); |
| 826 | |
| 827 | spin_lock(&ud->lock); |
| 828 | |
| 829 | vdev->speed = 0; |
| 830 | vdev->devid = 0; |
| 831 | |
Markus Elfring | 03f3df8 | 2014-11-21 16:33:18 +0100 | [diff] [blame] | 832 | usb_put_dev(vdev->udev); |
Max Vozeler | 7606ee8 | 2011-01-12 15:02:00 +0200 | [diff] [blame] | 833 | vdev->udev = NULL; |
| 834 | |
Bernard Blackham | 3d0a2a2 | 2012-10-22 06:45:00 +1100 | [diff] [blame] | 835 | if (ud->tcp_socket) { |
Al Viro | 964ea96 | 2014-03-05 20:33:08 -0500 | [diff] [blame] | 836 | sockfd_put(ud->tcp_socket); |
Bernard Blackham | 3d0a2a2 | 2012-10-22 06:45:00 +1100 | [diff] [blame] | 837 | ud->tcp_socket = NULL; |
| 838 | } |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 839 | ud->status = VDEV_ST_NULL; |
| 840 | |
| 841 | spin_unlock(&ud->lock); |
| 842 | } |
| 843 | |
| 844 | static void vhci_device_unusable(struct usbip_device *ud) |
| 845 | { |
| 846 | spin_lock(&ud->lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 847 | ud->status = VDEV_ST_ERROR; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 848 | spin_unlock(&ud->lock); |
| 849 | } |
| 850 | |
| 851 | static void vhci_device_init(struct vhci_device *vdev) |
| 852 | { |
| 853 | memset(vdev, 0, sizeof(*vdev)); |
| 854 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 855 | vdev->ud.side = USBIP_VHCI; |
| 856 | vdev->ud.status = VDEV_ST_NULL; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 857 | spin_lock_init(&vdev->ud.lock); |
| 858 | |
| 859 | INIT_LIST_HEAD(&vdev->priv_rx); |
| 860 | INIT_LIST_HEAD(&vdev->priv_tx); |
| 861 | INIT_LIST_HEAD(&vdev->unlink_tx); |
| 862 | INIT_LIST_HEAD(&vdev->unlink_rx); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 863 | spin_lock_init(&vdev->priv_lock); |
| 864 | |
| 865 | init_waitqueue_head(&vdev->waitq_tx); |
| 866 | |
| 867 | vdev->ud.eh_ops.shutdown = vhci_shutdown_connection; |
| 868 | vdev->ud.eh_ops.reset = vhci_device_reset; |
| 869 | vdev->ud.eh_ops.unusable = vhci_device_unusable; |
| 870 | |
| 871 | usbip_start_eh(&vdev->ud); |
| 872 | } |
| 873 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 874 | static int vhci_start(struct usb_hcd *hcd) |
| 875 | { |
| 876 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); |
| 877 | int rhport; |
| 878 | int err = 0; |
| 879 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 880 | usbip_dbg_vhci_hc("enter vhci_start\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 881 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 882 | /* initialize private data of usb_hcd */ |
| 883 | |
| 884 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) { |
| 885 | struct vhci_device *vdev = &vhci->vdev[rhport]; |
Pawel Lebioda | 3eed8c0 | 2014-05-14 19:20:27 +0200 | [diff] [blame] | 886 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 887 | vhci_device_init(vdev); |
| 888 | vdev->rhport = rhport; |
| 889 | } |
| 890 | |
| 891 | atomic_set(&vhci->seqnum, 0); |
| 892 | spin_lock_init(&vhci->lock); |
| 893 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 894 | hcd->power_budget = 0; /* no limit */ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 895 | hcd->uses_new_polling = 1; |
| 896 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 897 | /* vhci_hcd is now ready to be controlled through sysfs */ |
| 898 | err = sysfs_create_group(&vhci_dev(vhci)->kobj, &dev_attr_group); |
| 899 | if (err) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 900 | pr_err("create sysfs files\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 901 | return err; |
| 902 | } |
| 903 | |
| 904 | return 0; |
| 905 | } |
| 906 | |
| 907 | static void vhci_stop(struct usb_hcd *hcd) |
| 908 | { |
| 909 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); |
| 910 | int rhport = 0; |
| 911 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 912 | usbip_dbg_vhci_hc("stop VHCI controller\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 913 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 914 | /* 1. remove the userland interface of vhci_hcd */ |
| 915 | sysfs_remove_group(&vhci_dev(vhci)->kobj, &dev_attr_group); |
| 916 | |
| 917 | /* 2. shutdown all the ports of vhci_hcd */ |
Aldo Iljazi | 909cc6f | 2013-12-02 15:22:29 +0200 | [diff] [blame] | 918 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 919 | struct vhci_device *vdev = &vhci->vdev[rhport]; |
| 920 | |
| 921 | usbip_event_add(&vdev->ud, VDEV_EVENT_REMOVED); |
| 922 | usbip_stop_eh(&vdev->ud); |
| 923 | } |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 924 | } |
| 925 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 926 | static int vhci_get_frame_number(struct usb_hcd *hcd) |
| 927 | { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 928 | pr_err("Not yet implemented\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 929 | return 0; |
| 930 | } |
| 931 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 932 | #ifdef CONFIG_PM |
| 933 | |
| 934 | /* FIXME: suspend/resume */ |
| 935 | static int vhci_bus_suspend(struct usb_hcd *hcd) |
| 936 | { |
| 937 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); |
| 938 | |
| 939 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); |
| 940 | |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 941 | spin_lock(&vhci->lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 942 | hcd->state = HC_STATE_SUSPENDED; |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 943 | spin_unlock(&vhci->lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 944 | |
| 945 | return 0; |
| 946 | } |
| 947 | |
| 948 | static int vhci_bus_resume(struct usb_hcd *hcd) |
| 949 | { |
| 950 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); |
| 951 | int rc = 0; |
| 952 | |
| 953 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); |
| 954 | |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 955 | spin_lock(&vhci->lock); |
Stefan Reif | c46cb54 | 2013-02-22 12:13:32 +0100 | [diff] [blame] | 956 | if (!HCD_HW_ACCESSIBLE(hcd)) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 957 | rc = -ESHUTDOWN; |
Stefan Reif | c46cb54 | 2013-02-22 12:13:32 +0100 | [diff] [blame] | 958 | else |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 959 | hcd->state = HC_STATE_RUNNING; |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 960 | spin_unlock(&vhci->lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 961 | |
matt mooney | 8735276 | 2011-05-19 21:36:56 -0700 | [diff] [blame] | 962 | return rc; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 963 | } |
| 964 | |
| 965 | #else |
| 966 | |
| 967 | #define vhci_bus_suspend NULL |
| 968 | #define vhci_bus_resume NULL |
| 969 | #endif |
| 970 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 971 | static struct hc_driver vhci_hc_driver = { |
| 972 | .description = driver_name, |
| 973 | .product_desc = driver_desc, |
| 974 | .hcd_priv_size = sizeof(struct vhci_hcd), |
| 975 | |
| 976 | .flags = HCD_USB2, |
| 977 | |
| 978 | .start = vhci_start, |
Ruslan Pisarev | 0051268 | 2010-03-15 17:06:44 +0200 | [diff] [blame] | 979 | .stop = vhci_stop, |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 980 | |
| 981 | .urb_enqueue = vhci_urb_enqueue, |
| 982 | .urb_dequeue = vhci_urb_dequeue, |
| 983 | |
| 984 | .get_frame_number = vhci_get_frame_number, |
| 985 | |
| 986 | .hub_status_data = vhci_hub_status, |
| 987 | .hub_control = vhci_hub_control, |
| 988 | .bus_suspend = vhci_bus_suspend, |
| 989 | .bus_resume = vhci_bus_resume, |
| 990 | }; |
| 991 | |
| 992 | static int vhci_hcd_probe(struct platform_device *pdev) |
| 993 | { |
| 994 | struct usb_hcd *hcd; |
| 995 | int ret; |
| 996 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 997 | 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] | 998 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 999 | /* |
| 1000 | * Allocate and initialize hcd. |
| 1001 | * Our private data is also allocated automatically. |
| 1002 | */ |
Kay Sievers | e913397 | 2008-10-30 01:59:32 +0100 | [diff] [blame] | 1003 | 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] | 1004 | if (!hcd) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 1005 | pr_err("create hcd failed\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1006 | return -ENOMEM; |
| 1007 | } |
Alan Stern | cee6a26 | 2011-05-02 14:21:44 -0400 | [diff] [blame] | 1008 | hcd->has_tt = 1; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1009 | |
| 1010 | /* this is private data for vhci_hcd */ |
| 1011 | the_controller = hcd_to_vhci(hcd); |
| 1012 | |
| 1013 | /* |
| 1014 | * Finish generic HCD structure initialization and register. |
| 1015 | * Call the driver's reset() and start() routines. |
| 1016 | */ |
| 1017 | ret = usb_add_hcd(hcd, 0, 0); |
| 1018 | if (ret != 0) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 1019 | pr_err("usb_add_hcd failed %d\n", ret); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1020 | usb_put_hcd(hcd); |
| 1021 | the_controller = NULL; |
| 1022 | return ret; |
| 1023 | } |
| 1024 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 1025 | usbip_dbg_vhci_hc("bye\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1026 | return 0; |
| 1027 | } |
| 1028 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1029 | static int vhci_hcd_remove(struct platform_device *pdev) |
| 1030 | { |
| 1031 | struct usb_hcd *hcd; |
| 1032 | |
| 1033 | hcd = platform_get_drvdata(pdev); |
| 1034 | if (!hcd) |
| 1035 | return 0; |
| 1036 | |
| 1037 | /* |
| 1038 | * Disconnects the root hub, |
| 1039 | * then reverses the effects of usb_add_hcd(), |
| 1040 | * invoking the HCD's stop() methods. |
| 1041 | */ |
| 1042 | usb_remove_hcd(hcd); |
| 1043 | usb_put_hcd(hcd); |
| 1044 | the_controller = NULL; |
| 1045 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1046 | return 0; |
| 1047 | } |
| 1048 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1049 | #ifdef CONFIG_PM |
| 1050 | |
| 1051 | /* what should happen for USB/IP under suspend/resume? */ |
| 1052 | static int vhci_hcd_suspend(struct platform_device *pdev, pm_message_t state) |
| 1053 | { |
| 1054 | struct usb_hcd *hcd; |
| 1055 | int rhport = 0; |
| 1056 | int connected = 0; |
| 1057 | int ret = 0; |
| 1058 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1059 | hcd = platform_get_drvdata(pdev); |
| 1060 | |
| 1061 | spin_lock(&the_controller->lock); |
| 1062 | |
| 1063 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) |
| 1064 | if (the_controller->port_status[rhport] & |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 1065 | USB_PORT_STAT_CONNECTION) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1066 | connected += 1; |
| 1067 | |
| 1068 | spin_unlock(&the_controller->lock); |
| 1069 | |
| 1070 | if (connected > 0) { |
Cédric Cabessa | 7923a65 | 2014-03-19 23:04:57 +0100 | [diff] [blame] | 1071 | dev_info(&pdev->dev, |
| 1072 | "We have %d active connection%s. Do not suspend.\n", |
| 1073 | connected, (connected == 1 ? "" : "s")); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1074 | ret = -EBUSY; |
| 1075 | } else { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 1076 | dev_info(&pdev->dev, "suspend vhci_hcd"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1077 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
| 1078 | } |
| 1079 | |
| 1080 | return ret; |
| 1081 | } |
| 1082 | |
| 1083 | static int vhci_hcd_resume(struct platform_device *pdev) |
| 1084 | { |
| 1085 | struct usb_hcd *hcd; |
| 1086 | |
| 1087 | dev_dbg(&pdev->dev, "%s\n", __func__); |
| 1088 | |
| 1089 | hcd = platform_get_drvdata(pdev); |
| 1090 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
| 1091 | usb_hcd_poll_rh_status(hcd); |
| 1092 | |
| 1093 | return 0; |
| 1094 | } |
| 1095 | |
| 1096 | #else |
| 1097 | |
| 1098 | #define vhci_hcd_suspend NULL |
| 1099 | #define vhci_hcd_resume NULL |
| 1100 | |
| 1101 | #endif |
| 1102 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1103 | static struct platform_driver vhci_driver = { |
| 1104 | .probe = vhci_hcd_probe, |
Bill Pemberton | f307da9 | 2012-11-19 13:21:02 -0500 | [diff] [blame] | 1105 | .remove = vhci_hcd_remove, |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1106 | .suspend = vhci_hcd_suspend, |
| 1107 | .resume = vhci_hcd_resume, |
| 1108 | .driver = { |
Geert Uytterhoeven | 1c126bc | 2013-11-12 20:07:19 +0100 | [diff] [blame] | 1109 | .name = driver_name, |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1110 | }, |
| 1111 | }; |
| 1112 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1113 | /* |
| 1114 | * The VHCI 'device' is 'virtual'; not a real plug&play hardware. |
| 1115 | * We need to add this virtual device as a platform device arbitrarily: |
| 1116 | * 1. platform_device_register() |
| 1117 | */ |
| 1118 | static void the_pdev_release(struct device *dev) |
| 1119 | { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1120 | } |
| 1121 | |
| 1122 | static struct platform_device the_pdev = { |
| 1123 | /* should be the same name as driver_name */ |
Geert Uytterhoeven | 6fafecb | 2013-11-12 20:07:21 +0100 | [diff] [blame] | 1124 | .name = driver_name, |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1125 | .id = -1, |
| 1126 | .dev = { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1127 | .release = the_pdev_release, |
| 1128 | }, |
| 1129 | }; |
| 1130 | |
matt mooney | 0392bbb | 2011-05-19 21:37:06 -0700 | [diff] [blame] | 1131 | static int __init vhci_hcd_init(void) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1132 | { |
| 1133 | int ret; |
| 1134 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1135 | if (usb_disabled()) |
| 1136 | return -ENODEV; |
| 1137 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1138 | ret = platform_driver_register(&vhci_driver); |
navin patidar | 4d42195 | 2013-09-10 10:43:39 +0530 | [diff] [blame] | 1139 | if (ret) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1140 | goto err_driver_register; |
| 1141 | |
| 1142 | ret = platform_device_register(&the_pdev); |
navin patidar | 4d42195 | 2013-09-10 10:43:39 +0530 | [diff] [blame] | 1143 | if (ret) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1144 | goto err_platform_device_register; |
| 1145 | |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 1146 | pr_info(DRIVER_DESC " v" USBIP_VERSION "\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1147 | return ret; |
| 1148 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1149 | err_platform_device_register: |
| 1150 | platform_driver_unregister(&vhci_driver); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1151 | err_driver_register: |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1152 | return ret; |
| 1153 | } |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1154 | |
matt mooney | 0392bbb | 2011-05-19 21:37:06 -0700 | [diff] [blame] | 1155 | static void __exit vhci_hcd_exit(void) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1156 | { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1157 | platform_device_unregister(&the_pdev); |
| 1158 | platform_driver_unregister(&vhci_driver); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1159 | } |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 1160 | |
matt mooney | 0392bbb | 2011-05-19 21:37:06 -0700 | [diff] [blame] | 1161 | module_init(vhci_hcd_init); |
| 1162 | module_exit(vhci_hcd_exit); |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 1163 | |
| 1164 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 1165 | MODULE_DESCRIPTION(DRIVER_DESC); |
matt mooney | 4ce0a41 | 2011-05-06 03:47:56 -0700 | [diff] [blame] | 1166 | MODULE_LICENSE("GPL"); |
matt mooney | 6973c6f | 2011-05-11 01:54:14 -0700 | [diff] [blame] | 1167 | MODULE_VERSION(USBIP_VERSION); |