Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2003-2008 Takahiro Hirofuchi |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 3 | * Copyright (C) 2015-2016 Nobuo Iwata |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 4 | * |
| 5 | * This is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
| 18 | * USA. |
| 19 | */ |
| 20 | |
matt mooney | 7aaacb4 | 2011-05-11 22:33:43 -0700 | [diff] [blame] | 21 | #include <linux/init.h> |
Bernard Blackham | 3d0a2a2 | 2012-10-22 06:45:00 +1100 | [diff] [blame] | 22 | #include <linux/file.h> |
matt mooney | 7aaacb4 | 2011-05-11 22:33:43 -0700 | [diff] [blame] | 23 | #include <linux/kernel.h> |
Arnd Bergmann | 9720b4b | 2011-03-02 00:13:05 +0100 | [diff] [blame] | 24 | #include <linux/kthread.h> |
matt mooney | 7aaacb4 | 2011-05-11 22:33:43 -0700 | [diff] [blame] | 25 | #include <linux/module.h> |
| 26 | #include <linux/platform_device.h> |
| 27 | #include <linux/slab.h> |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 28 | |
| 29 | #include "usbip_common.h" |
| 30 | #include "vhci.h" |
| 31 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 32 | #define DRIVER_AUTHOR "Takahiro Hirofuchi" |
matt mooney | 64e6242 | 2011-05-11 22:33:44 -0700 | [diff] [blame] | 33 | #define DRIVER_DESC "USB/IP 'Virtual' Host Controller (VHCI) Driver" |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 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 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 45 | /* See usb gadget dummy hcd */ |
| 46 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 47 | static int vhci_hub_status(struct usb_hcd *hcd, char *buff); |
| 48 | 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] | 49 | u16 wIndex, char *buff, u16 wLength); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 50 | static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 51 | gfp_t mem_flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 52 | static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status); |
| 53 | static int vhci_start(struct usb_hcd *vhci_hcd); |
| 54 | static void vhci_stop(struct usb_hcd *hcd); |
| 55 | static int vhci_get_frame_number(struct usb_hcd *hcd); |
| 56 | |
| 57 | static const char driver_name[] = "vhci_hcd"; |
Robert P. J. Day | f5e08ca7 | 2009-11-13 15:13:43 -0500 | [diff] [blame] | 58 | static const char driver_desc[] = "USB/IP Virtual Host Controller"; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 59 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 60 | int vhci_num_controllers = VHCI_NR_HCS; |
| 61 | |
| 62 | struct platform_device **vhci_pdevs; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 63 | |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 64 | static const char * const bit_desc[] = { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 65 | "CONNECTION", /*0*/ |
| 66 | "ENABLE", /*1*/ |
| 67 | "SUSPEND", /*2*/ |
| 68 | "OVER_CURRENT", /*3*/ |
| 69 | "RESET", /*4*/ |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 70 | "R5", /*5*/ |
| 71 | "R6", /*6*/ |
| 72 | "R7", /*7*/ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 73 | "POWER", /*8*/ |
| 74 | "LOWSPEED", /*9*/ |
| 75 | "HIGHSPEED", /*10*/ |
| 76 | "PORT_TEST", /*11*/ |
| 77 | "INDICATOR", /*12*/ |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 78 | "R13", /*13*/ |
| 79 | "R14", /*14*/ |
| 80 | "R15", /*15*/ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 81 | "C_CONNECTION", /*16*/ |
| 82 | "C_ENABLE", /*17*/ |
| 83 | "C_SUSPEND", /*18*/ |
| 84 | "C_OVER_CURRENT", /*19*/ |
| 85 | "C_RESET", /*20*/ |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 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*/ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 97 | }; |
| 98 | |
Márton Németh | 4a3ca2b | 2011-06-14 08:28:26 +0200 | [diff] [blame] | 99 | static void dump_port_status_diff(u32 prev_status, u32 new_status) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 100 | { |
| 101 | int i = 0; |
Márton Németh | 4a3ca2b | 2011-06-14 08:28:26 +0200 | [diff] [blame] | 102 | u32 bit = 1; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 103 | |
Márton Németh | 4a3ca2b | 2011-06-14 08:28:26 +0200 | [diff] [blame] | 104 | pr_debug("status prev -> new: %08x -> %08x\n", prev_status, new_status); |
| 105 | while (bit) { |
| 106 | u32 prev = prev_status & bit; |
| 107 | u32 new = new_status & bit; |
| 108 | char change; |
| 109 | |
| 110 | if (!prev && new) |
| 111 | change = '+'; |
| 112 | else if (prev && !new) |
| 113 | change = '-'; |
| 114 | else |
| 115 | change = ' '; |
| 116 | |
| 117 | if (prev || new) |
| 118 | pr_debug(" %c%s\n", change, bit_desc[i]); |
| 119 | bit <<= 1; |
| 120 | i++; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 121 | } |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 122 | pr_debug("\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 123 | } |
| 124 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 125 | void rh_port_connect(struct vhci_device *vdev, enum usb_device_speed speed) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 126 | { |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 127 | struct vhci_hcd *vhci = vdev_to_vhci(vdev); |
| 128 | int rhport = vdev->rhport; |
| 129 | u32 status; |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 130 | unsigned long flags; |
| 131 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 132 | usbip_dbg_vhci_rh("rh_port_connect %d\n", rhport); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 133 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 134 | spin_lock_irqsave(&vhci->lock, flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 135 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 136 | status = vhci->port_status[rhport]; |
| 137 | |
| 138 | status |= USB_PORT_STAT_CONNECTION | (1 << USB_PORT_FEAT_C_CONNECTION); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 139 | |
| 140 | switch (speed) { |
| 141 | case USB_SPEED_HIGH: |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 142 | status |= USB_PORT_STAT_HIGH_SPEED; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 143 | break; |
| 144 | case USB_SPEED_LOW: |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 145 | status |= USB_PORT_STAT_LOW_SPEED; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 146 | break; |
| 147 | default: |
| 148 | break; |
| 149 | } |
| 150 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 151 | vhci->port_status[rhport] = status; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 152 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 153 | spin_unlock_irqrestore(&vhci->lock, flags); |
| 154 | |
| 155 | usb_hcd_poll_rh_status(vhci_to_hcd(vhci)); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 156 | } |
| 157 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 158 | static void rh_port_disconnect(struct vhci_device *vdev) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 159 | { |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 160 | struct vhci_hcd *vhci = vdev_to_vhci(vdev); |
| 161 | int rhport = vdev->rhport; |
| 162 | u32 status; |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 163 | unsigned long flags; |
| 164 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 165 | usbip_dbg_vhci_rh("rh_port_disconnect %d\n", rhport); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 166 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 167 | spin_lock_irqsave(&vhci->lock, flags); |
Bart Westgeest | c7f0089 | 2012-10-10 13:34:27 -0400 | [diff] [blame] | 168 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 169 | status = vhci->port_status[rhport]; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 170 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 171 | status &= ~USB_PORT_STAT_CONNECTION; |
| 172 | status |= (1 << USB_PORT_FEAT_C_CONNECTION); |
| 173 | |
| 174 | vhci->port_status[rhport] = status; |
| 175 | |
| 176 | spin_unlock_irqrestore(&vhci->lock, flags); |
| 177 | usb_hcd_poll_rh_status(vhci_to_hcd(vhci)); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 178 | } |
| 179 | |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 180 | #define PORT_C_MASK \ |
| 181 | ((USB_PORT_STAT_C_CONNECTION \ |
| 182 | | USB_PORT_STAT_C_ENABLE \ |
| 183 | | USB_PORT_STAT_C_SUSPEND \ |
| 184 | | USB_PORT_STAT_C_OVERCURRENT \ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 185 | | USB_PORT_STAT_C_RESET) << 16) |
| 186 | |
| 187 | /* |
Bart Westgeest | 7489301 | 2012-06-13 15:37:18 -0400 | [diff] [blame] | 188 | * Returns 0 if the status hasn't changed, or the number of bytes in buf. |
| 189 | * Ports are 0-indexed from the HCD point of view, |
| 190 | * and 1-indexed from the USB core pointer of view. |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 191 | * |
| 192 | * @buf: a bitmap to show which port status has been changed. |
Bart Westgeest | 7489301 | 2012-06-13 15:37:18 -0400 | [diff] [blame] | 193 | * bit 0: reserved |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 194 | * bit 1: the status of port 0 has been changed. |
| 195 | * bit 2: the status of port 1 has been changed. |
| 196 | * ... |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 197 | */ |
| 198 | static int vhci_hub_status(struct usb_hcd *hcd, char *buf) |
| 199 | { |
| 200 | struct vhci_hcd *vhci; |
Bart Westgeest | 7489301 | 2012-06-13 15:37:18 -0400 | [diff] [blame] | 201 | int retval; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 202 | int rhport; |
| 203 | int changed = 0; |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 204 | unsigned long flags; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 205 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 206 | retval = DIV_ROUND_UP(VHCI_HC_PORTS + 1, 8); |
Bart Westgeest | 7489301 | 2012-06-13 15:37:18 -0400 | [diff] [blame] | 207 | memset(buf, 0, retval); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 208 | |
| 209 | vhci = hcd_to_vhci(hcd); |
| 210 | |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 211 | spin_lock_irqsave(&vhci->lock, flags); |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 212 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
Bart Westgeest | 7489301 | 2012-06-13 15:37:18 -0400 | [diff] [blame] | 213 | usbip_dbg_vhci_rh("hw accessible flag not on?\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 214 | goto done; |
| 215 | } |
| 216 | |
| 217 | /* check pseudo status register for each port */ |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 218 | for (rhport = 0; rhport < VHCI_HC_PORTS; rhport++) { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 219 | if ((vhci->port_status[rhport] & PORT_C_MASK)) { |
| 220 | /* The status of a port has been changed, */ |
Bart Westgeest | 7489301 | 2012-06-13 15:37:18 -0400 | [diff] [blame] | 221 | usbip_dbg_vhci_rh("port %d status changed\n", rhport); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 222 | |
Bart Westgeest | 7489301 | 2012-06-13 15:37:18 -0400 | [diff] [blame] | 223 | buf[(rhport + 1) / 8] |= 1 << (rhport + 1) % 8; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 224 | changed = 1; |
| 225 | } |
| 226 | } |
| 227 | |
navin patidar | 107f04b | 2012-09-06 16:49:50 +0530 | [diff] [blame] | 228 | if ((hcd->state == HC_STATE_SUSPENDED) && (changed == 1)) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 229 | usb_hcd_resume_root_hub(hcd); |
| 230 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 231 | done: |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 232 | spin_unlock_irqrestore(&vhci->lock, flags); |
Bart Westgeest | 7489301 | 2012-06-13 15:37:18 -0400 | [diff] [blame] | 233 | return changed ? retval : 0; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 234 | } |
| 235 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 236 | static inline void hub_descriptor(struct usb_hub_descriptor *desc) |
| 237 | { |
Johan Hovold | ec963b4 | 2017-05-10 18:18:26 +0200 | [diff] [blame] | 238 | int width; |
| 239 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 240 | memset(desc, 0, sizeof(*desc)); |
Sergei Shtylyov | 8f413d8 | 2015-03-29 01:45:02 +0300 | [diff] [blame] | 241 | desc->bDescriptorType = USB_DT_HUB; |
Vaishali Thakkar | 0c59633 | 2015-08-19 10:47:46 +0530 | [diff] [blame] | 242 | desc->wHubCharacteristics = cpu_to_le16( |
Sergei Shtylyov | 1cc9af8 | 2015-01-19 02:00:56 +0300 | [diff] [blame] | 243 | HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_COMMON_OCPM); |
Johan Hovold | ec963b4 | 2017-05-10 18:18:26 +0200 | [diff] [blame] | 244 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 245 | desc->bNbrPorts = VHCI_HC_PORTS; |
Johan Hovold | ec963b4 | 2017-05-10 18:18:26 +0200 | [diff] [blame] | 246 | BUILD_BUG_ON(VHCI_HC_PORTS > USB_MAXCHILDREN); |
| 247 | width = desc->bNbrPorts / 8 + 1; |
| 248 | desc->bDescLength = USB_DT_HUB_NONVAR_SIZE + 2 * width; |
| 249 | memset(&desc->u.hs.DeviceRemovable[0], 0, width); |
| 250 | memset(&desc->u.hs.DeviceRemovable[width], 0xff, width); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 251 | } |
| 252 | |
| 253 | static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, |
| 254 | u16 wIndex, char *buf, u16 wLength) |
| 255 | { |
| 256 | struct vhci_hcd *dum; |
| 257 | int retval = 0; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 258 | int rhport; |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 259 | unsigned long flags; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 260 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 261 | u32 prev_port_status[VHCI_HC_PORTS]; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 262 | |
Alan Stern | 541c7d4 | 2010-06-22 16:39:10 -0400 | [diff] [blame] | 263 | if (!HCD_HW_ACCESSIBLE(hcd)) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 264 | return -ETIMEDOUT; |
| 265 | |
| 266 | /* |
| 267 | * NOTE: |
| 268 | * wIndex shows the port number and begins from 1. |
| 269 | */ |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 270 | 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] | 271 | wIndex); |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 272 | if (wIndex > VHCI_HC_PORTS) |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 273 | pr_err("invalid port number %d\n", wIndex); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 274 | rhport = ((__u8)(wIndex & 0x00ff)) - 1; |
| 275 | |
| 276 | dum = hcd_to_vhci(hcd); |
| 277 | |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 278 | spin_lock_irqsave(&dum->lock, flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 279 | |
| 280 | /* store old status and compare now and old later */ |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 281 | if (usbip_dbg_flag_vhci_rh) { |
Márton Németh | 6f480bf | 2011-06-13 23:30:09 +0200 | [diff] [blame] | 282 | memcpy(prev_port_status, dum->port_status, |
| 283 | sizeof(prev_port_status)); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 284 | } |
| 285 | |
| 286 | switch (typeReq) { |
| 287 | case ClearHubFeature: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 288 | usbip_dbg_vhci_rh(" ClearHubFeature\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 289 | break; |
| 290 | case ClearPortFeature: |
| 291 | switch (wValue) { |
| 292 | case USB_PORT_FEAT_SUSPEND: |
| 293 | if (dum->port_status[rhport] & USB_PORT_STAT_SUSPEND) { |
| 294 | /* 20msec signaling */ |
| 295 | dum->resuming = 1; |
| 296 | dum->re_timeout = |
| 297 | jiffies + msecs_to_jiffies(20); |
| 298 | } |
| 299 | break; |
| 300 | case USB_PORT_FEAT_POWER: |
Cédric Cabessa | 7923a65 | 2014-03-19 23:04:57 +0100 | [diff] [blame] | 301 | usbip_dbg_vhci_rh( |
| 302 | " ClearPortFeature: USB_PORT_FEAT_POWER\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 303 | dum->port_status[rhport] = 0; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 304 | dum->resuming = 0; |
| 305 | break; |
| 306 | case USB_PORT_FEAT_C_RESET: |
Cédric Cabessa | 7923a65 | 2014-03-19 23:04:57 +0100 | [diff] [blame] | 307 | usbip_dbg_vhci_rh( |
| 308 | " ClearPortFeature: USB_PORT_FEAT_C_RESET\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 309 | switch (dum->vdev[rhport].speed) { |
| 310 | case USB_SPEED_HIGH: |
| 311 | dum->port_status[rhport] |= |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 312 | USB_PORT_STAT_HIGH_SPEED; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 313 | break; |
| 314 | case USB_SPEED_LOW: |
| 315 | dum->port_status[rhport] |= |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 316 | USB_PORT_STAT_LOW_SPEED; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 317 | break; |
| 318 | default: |
| 319 | break; |
| 320 | } |
Gustavo A. R. Silva | 7c92e5f | 2017-02-09 01:49:56 -0600 | [diff] [blame] | 321 | break; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 322 | default: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 323 | usbip_dbg_vhci_rh(" ClearPortFeature: default %x\n", |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 324 | wValue); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 325 | dum->port_status[rhport] &= ~(1 << wValue); |
matt mooney | 49aecef | 2011-05-06 03:47:54 -0700 | [diff] [blame] | 326 | break; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 327 | } |
| 328 | break; |
| 329 | case GetHubDescriptor: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 330 | usbip_dbg_vhci_rh(" GetHubDescriptor\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 331 | hub_descriptor((struct usb_hub_descriptor *) buf); |
| 332 | break; |
| 333 | case GetHubStatus: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 334 | usbip_dbg_vhci_rh(" GetHubStatus\n"); |
Alexey Tulia | a06a24d | 2014-06-13 11:35:13 +0300 | [diff] [blame] | 335 | *(__le32 *) buf = cpu_to_le32(0); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 336 | break; |
| 337 | case GetPortStatus: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 338 | usbip_dbg_vhci_rh(" GetPortStatus port %x\n", wIndex); |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 339 | if (wIndex > VHCI_HC_PORTS || wIndex < 1) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 340 | pr_err("invalid port number %d\n", wIndex); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 341 | retval = -EPIPE; |
| 342 | } |
| 343 | |
Bart Westgeest | c7f0089 | 2012-10-10 13:34:27 -0400 | [diff] [blame] | 344 | /* we do not care about resume. */ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 345 | |
| 346 | /* whoever resets or resumes must GetPortStatus to |
| 347 | * complete it!! |
Bart Westgeest | c7f0089 | 2012-10-10 13:34:27 -0400 | [diff] [blame] | 348 | */ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 349 | if (dum->resuming && time_after(jiffies, dum->re_timeout)) { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 350 | dum->port_status[rhport] |= |
matt mooney | 8735276 | 2011-05-19 21:36:56 -0700 | [diff] [blame] | 351 | (1 << USB_PORT_FEAT_C_SUSPEND); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 352 | dum->port_status[rhport] &= |
matt mooney | 8735276 | 2011-05-19 21:36:56 -0700 | [diff] [blame] | 353 | ~(1 << USB_PORT_FEAT_SUSPEND); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 354 | dum->resuming = 0; |
| 355 | dum->re_timeout = 0; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 356 | } |
| 357 | |
| 358 | if ((dum->port_status[rhport] & (1 << USB_PORT_FEAT_RESET)) != |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 359 | 0 && time_after(jiffies, dum->re_timeout)) { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 360 | dum->port_status[rhport] |= |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 361 | (1 << USB_PORT_FEAT_C_RESET); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 362 | dum->port_status[rhport] &= |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 363 | ~(1 << USB_PORT_FEAT_RESET); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 364 | dum->re_timeout = 0; |
| 365 | |
| 366 | if (dum->vdev[rhport].ud.status == |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 367 | VDEV_ST_NOTASSIGNED) { |
Cédric Cabessa | 7923a65 | 2014-03-19 23:04:57 +0100 | [diff] [blame] | 368 | usbip_dbg_vhci_rh( |
| 369 | " enable rhport %d (status %u)\n", |
| 370 | rhport, |
| 371 | dum->vdev[rhport].ud.status); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 372 | dum->port_status[rhport] |= |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 373 | USB_PORT_STAT_ENABLE; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 374 | } |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 375 | } |
Teodora Baluta | d0306a5 | 2013-11-04 13:12:12 +0200 | [diff] [blame] | 376 | ((__le16 *) buf)[0] = cpu_to_le16(dum->port_status[rhport]); |
Cédric Cabessa | 7923a65 | 2014-03-19 23:04:57 +0100 | [diff] [blame] | 377 | ((__le16 *) buf)[1] = |
| 378 | cpu_to_le16(dum->port_status[rhport] >> 16); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 379 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 380 | usbip_dbg_vhci_rh(" GetPortStatus bye %x %x\n", ((u16 *)buf)[0], |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 381 | ((u16 *)buf)[1]); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 382 | break; |
| 383 | case SetHubFeature: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 384 | usbip_dbg_vhci_rh(" SetHubFeature\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 385 | retval = -EPIPE; |
| 386 | break; |
| 387 | case SetPortFeature: |
| 388 | switch (wValue) { |
| 389 | case USB_PORT_FEAT_SUSPEND: |
Cédric Cabessa | 7923a65 | 2014-03-19 23:04:57 +0100 | [diff] [blame] | 390 | usbip_dbg_vhci_rh( |
| 391 | " SetPortFeature: USB_PORT_FEAT_SUSPEND\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 392 | break; |
| 393 | case USB_PORT_FEAT_RESET: |
Cédric Cabessa | 7923a65 | 2014-03-19 23:04:57 +0100 | [diff] [blame] | 394 | usbip_dbg_vhci_rh( |
| 395 | " SetPortFeature: USB_PORT_FEAT_RESET\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 396 | /* if it's already running, disconnect first */ |
| 397 | if (dum->port_status[rhport] & USB_PORT_STAT_ENABLE) { |
| 398 | dum->port_status[rhport] &= |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 399 | ~(USB_PORT_STAT_ENABLE | |
| 400 | USB_PORT_STAT_LOW_SPEED | |
| 401 | USB_PORT_STAT_HIGH_SPEED); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 402 | /* FIXME test that code path! */ |
| 403 | } |
| 404 | /* 50msec reset signaling */ |
| 405 | dum->re_timeout = jiffies + msecs_to_jiffies(50); |
| 406 | |
| 407 | /* FALLTHROUGH */ |
| 408 | default: |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 409 | usbip_dbg_vhci_rh(" SetPortFeature: default %d\n", |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 410 | wValue); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 411 | dum->port_status[rhport] |= (1 << wValue); |
matt mooney | 49aecef | 2011-05-06 03:47:54 -0700 | [diff] [blame] | 412 | break; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 413 | } |
| 414 | break; |
| 415 | |
| 416 | default: |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 417 | pr_err("default: no such request\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 418 | |
| 419 | /* "protocol stall" on error */ |
| 420 | retval = -EPIPE; |
| 421 | } |
| 422 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 423 | if (usbip_dbg_flag_vhci_rh) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 424 | pr_debug("port %d\n", rhport); |
Márton Németh | bfb4ce2 | 2011-06-13 23:47:39 +0200 | [diff] [blame] | 425 | /* Only dump valid port status */ |
| 426 | if (rhport >= 0) { |
Márton Németh | 4a3ca2b | 2011-06-14 08:28:26 +0200 | [diff] [blame] | 427 | dump_port_status_diff(prev_port_status[rhport], |
| 428 | dum->port_status[rhport]); |
Márton Németh | bfb4ce2 | 2011-06-13 23:47:39 +0200 | [diff] [blame] | 429 | } |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 430 | } |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 431 | usbip_dbg_vhci_rh(" bye\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 432 | |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 433 | spin_unlock_irqrestore(&dum->lock, flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 434 | |
| 435 | return retval; |
| 436 | } |
| 437 | |
Yuyang Du | 4eebed9 | 2017-04-06 06:03:22 +0800 | [diff] [blame] | 438 | static void vhci_tx_urb(struct urb *urb, struct vhci_device *vdev) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 439 | { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 440 | struct vhci_priv *priv; |
Nobuo Iwata | d79cda0 | 2016-10-13 12:49:02 +0900 | [diff] [blame] | 441 | struct vhci_hcd *vhci; |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 442 | unsigned long flags; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 443 | |
| 444 | if (!vdev) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 445 | pr_err("could not get virtual device"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 446 | return; |
| 447 | } |
Nobuo Iwata | d79cda0 | 2016-10-13 12:49:02 +0900 | [diff] [blame] | 448 | vhci = vdev_to_vhci(vdev); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 449 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 450 | priv = kzalloc(sizeof(struct vhci_priv), GFP_ATOMIC); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 451 | if (!priv) { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 452 | usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC); |
| 453 | return; |
| 454 | } |
| 455 | |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 456 | spin_lock_irqsave(&vdev->priv_lock, flags); |
Joe Perches | 78110bb | 2013-02-11 09:41:29 -0800 | [diff] [blame] | 457 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 458 | priv->seqnum = atomic_inc_return(&vhci->seqnum); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 459 | if (priv->seqnum == 0xffff) |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 460 | dev_info(&urb->dev->dev, "seqnum max\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 461 | |
| 462 | priv->vdev = vdev; |
| 463 | priv->urb = urb; |
| 464 | |
| 465 | urb->hcpriv = (void *) priv; |
| 466 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 467 | list_add_tail(&priv->list, &vdev->priv_tx); |
| 468 | |
| 469 | wake_up(&vdev->waitq_tx); |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 470 | spin_unlock_irqrestore(&vdev->priv_lock, flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 471 | } |
| 472 | |
| 473 | static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, |
| 474 | gfp_t mem_flags) |
| 475 | { |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 476 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 477 | struct device *dev = &urb->dev->dev; |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 478 | u8 portnum = urb->dev->portnum; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 479 | int ret = 0; |
Max Vozeler | 6d21215 | 2011-01-12 15:02:02 +0200 | [diff] [blame] | 480 | struct vhci_device *vdev; |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 481 | unsigned long flags; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 482 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 483 | 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] | 484 | hcd, urb, mem_flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 485 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 486 | if (portnum > VHCI_HC_PORTS) { |
| 487 | pr_err("invalid port number %d\n", portnum); |
| 488 | return -ENODEV; |
| 489 | } |
| 490 | vdev = &vhci->vdev[portnum-1]; |
| 491 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 492 | /* patch to usb_sg_init() is in 2.5.60 */ |
| 493 | BUG_ON(!urb->transfer_buffer && urb->transfer_buffer_length); |
| 494 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 495 | spin_lock_irqsave(&vhci->lock, flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 496 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 497 | if (urb->status != -EINPROGRESS) { |
| 498 | dev_err(dev, "URB already unlinked!, status %d\n", urb->status); |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 499 | spin_unlock_irqrestore(&vhci->lock, flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 500 | return urb->status; |
| 501 | } |
| 502 | |
Max Vozeler | 6d21215 | 2011-01-12 15:02:02 +0200 | [diff] [blame] | 503 | /* refuse enqueue for dead connection */ |
| 504 | spin_lock(&vdev->ud.lock); |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 505 | if (vdev->ud.status == VDEV_ST_NULL || |
| 506 | vdev->ud.status == VDEV_ST_ERROR) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 507 | dev_err(dev, "enqueue for inactive port %d\n", vdev->rhport); |
Max Vozeler | 6d21215 | 2011-01-12 15:02:02 +0200 | [diff] [blame] | 508 | spin_unlock(&vdev->ud.lock); |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 509 | spin_unlock_irqrestore(&vhci->lock, flags); |
Max Vozeler | 6d21215 | 2011-01-12 15:02:02 +0200 | [diff] [blame] | 510 | return -ENODEV; |
| 511 | } |
| 512 | spin_unlock(&vdev->ud.lock); |
| 513 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 514 | ret = usb_hcd_link_urb_to_ep(hcd, urb); |
| 515 | if (ret) |
| 516 | goto no_need_unlink; |
| 517 | |
| 518 | /* |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 519 | * The enumeration process is as follows; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 520 | * |
| 521 | * 1. Get_Descriptor request to DevAddrs(0) EndPoint(0) |
| 522 | * to get max packet length of default pipe |
| 523 | * |
| 524 | * 2. Set_Address request to DevAddr(0) EndPoint(0) |
| 525 | * |
| 526 | */ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 527 | if (usb_pipedevice(urb->pipe) == 0) { |
| 528 | __u8 type = usb_pipetype(urb->pipe); |
| 529 | struct usb_ctrlrequest *ctrlreq = |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 530 | (struct usb_ctrlrequest *) urb->setup_packet; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 531 | |
| 532 | if (type != PIPE_CONTROL || !ctrlreq) { |
| 533 | dev_err(dev, "invalid request to devnum 0\n"); |
Shan Wei | a7cd582 | 2009-07-24 16:57:35 +0800 | [diff] [blame] | 534 | ret = -EINVAL; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 535 | goto no_need_xmit; |
| 536 | } |
| 537 | |
| 538 | switch (ctrlreq->bRequest) { |
| 539 | case USB_REQ_SET_ADDRESS: |
| 540 | /* set_address may come when a device is reset */ |
| 541 | dev_info(dev, "SetAddress Request (%d) to port %d\n", |
| 542 | ctrlreq->wValue, vdev->rhport); |
| 543 | |
Markus Elfring | 03f3df8 | 2014-11-21 16:33:18 +0100 | [diff] [blame] | 544 | usb_put_dev(vdev->udev); |
Max Vozeler | 7606ee8 | 2011-01-12 15:02:00 +0200 | [diff] [blame] | 545 | vdev->udev = usb_get_dev(urb->dev); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 546 | |
| 547 | spin_lock(&vdev->ud.lock); |
| 548 | vdev->ud.status = VDEV_ST_USED; |
| 549 | spin_unlock(&vdev->ud.lock); |
| 550 | |
| 551 | if (urb->status == -EINPROGRESS) { |
| 552 | /* This request is successfully completed. */ |
| 553 | /* If not -EINPROGRESS, possibly unlinked. */ |
| 554 | urb->status = 0; |
| 555 | } |
| 556 | |
| 557 | goto no_need_xmit; |
| 558 | |
| 559 | case USB_REQ_GET_DESCRIPTOR: |
Teodora Baluta | d0306a5 | 2013-11-04 13:12:12 +0200 | [diff] [blame] | 560 | if (ctrlreq->wValue == cpu_to_le16(USB_DT_DEVICE << 8)) |
Cédric Cabessa | 7923a65 | 2014-03-19 23:04:57 +0100 | [diff] [blame] | 561 | usbip_dbg_vhci_hc( |
| 562 | "Not yet?:Get_Descriptor to device 0 (get max pipe size)\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 563 | |
Markus Elfring | 03f3df8 | 2014-11-21 16:33:18 +0100 | [diff] [blame] | 564 | usb_put_dev(vdev->udev); |
Max Vozeler | 7606ee8 | 2011-01-12 15:02:00 +0200 | [diff] [blame] | 565 | vdev->udev = usb_get_dev(urb->dev); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 566 | goto out; |
| 567 | |
| 568 | default: |
| 569 | /* NOT REACHED */ |
Cédric Cabessa | 7923a65 | 2014-03-19 23:04:57 +0100 | [diff] [blame] | 570 | dev_err(dev, |
| 571 | "invalid request to devnum 0 bRequest %u, wValue %u\n", |
| 572 | ctrlreq->bRequest, |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 573 | ctrlreq->wValue); |
| 574 | ret = -EINVAL; |
| 575 | goto no_need_xmit; |
| 576 | } |
| 577 | |
| 578 | } |
| 579 | |
| 580 | out: |
Yuyang Du | 4eebed9 | 2017-04-06 06:03:22 +0800 | [diff] [blame] | 581 | vhci_tx_urb(urb, vdev); |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 582 | spin_unlock_irqrestore(&vhci->lock, flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 583 | |
| 584 | return 0; |
| 585 | |
| 586 | no_need_xmit: |
| 587 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
| 588 | no_need_unlink: |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 589 | spin_unlock_irqrestore(&vhci->lock, flags); |
Igor Kotrasinski | 03b0a52 | 2015-09-21 11:30:44 +0200 | [diff] [blame] | 590 | if (!ret) |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 591 | usb_hcd_giveback_urb(hcd, urb, urb->status); |
Shan Wei | a7cd582 | 2009-07-24 16:57:35 +0800 | [diff] [blame] | 592 | return ret; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 593 | } |
| 594 | |
| 595 | /* |
| 596 | * vhci_rx gives back the urb after receiving the reply of the urb. If an |
| 597 | * unlink pdu is sent or not, vhci_rx receives a normal return pdu and gives |
| 598 | * back its urb. For the driver unlinking the urb, the content of the urb is |
| 599 | * not important, but the calling to its completion handler is important; the |
| 600 | * completion of unlinking is notified by the completion handler. |
| 601 | * |
| 602 | * |
| 603 | * CLIENT SIDE |
| 604 | * |
| 605 | * - When vhci_hcd receives RET_SUBMIT, |
| 606 | * |
| 607 | * - case 1a). the urb of the pdu is not unlinking. |
| 608 | * - normal case |
| 609 | * => just give back the urb |
| 610 | * |
| 611 | * - case 1b). the urb of the pdu is unlinking. |
| 612 | * - usbip.ko will return a reply of the unlinking request. |
| 613 | * => give back the urb now and go to case 2b). |
| 614 | * |
| 615 | * - When vhci_hcd receives RET_UNLINK, |
| 616 | * |
| 617 | * - case 2a). a submit request is still pending in vhci_hcd. |
| 618 | * - urb was really pending in usbip.ko and urb_unlink_urb() was |
| 619 | * completed there. |
| 620 | * => free a pending submit request |
| 621 | * => notify unlink completeness by giving back the urb |
| 622 | * |
| 623 | * - case 2b). a submit request is *not* pending in vhci_hcd. |
| 624 | * - urb was already given back to the core driver. |
| 625 | * => do not give back the urb |
| 626 | * |
| 627 | * |
| 628 | * SERVER SIDE |
| 629 | * |
| 630 | * - When usbip receives CMD_UNLINK, |
| 631 | * |
| 632 | * - case 3a). the urb of the unlink request is now in submission. |
| 633 | * => do usb_unlink_urb(). |
| 634 | * => after the unlink is completed, send RET_UNLINK. |
| 635 | * |
| 636 | * - case 3b). the urb of the unlink request is not in submission. |
| 637 | * - may be already completed or never be received |
| 638 | * => send RET_UNLINK |
| 639 | * |
| 640 | */ |
| 641 | static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
| 642 | { |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 643 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 644 | struct vhci_priv *priv; |
| 645 | struct vhci_device *vdev; |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 646 | unsigned long flags; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 647 | |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 648 | pr_info("dequeue a urb %p\n", urb); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 649 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 650 | spin_lock_irqsave(&vhci->lock, flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 651 | |
| 652 | priv = urb->hcpriv; |
| 653 | if (!priv) { |
| 654 | /* URB was never linked! or will be soon given back by |
| 655 | * vhci_rx. */ |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 656 | spin_unlock_irqrestore(&vhci->lock, flags); |
Igor Kotrasinski | 635e664 | 2015-09-21 11:30:45 +0200 | [diff] [blame] | 657 | return -EIDRM; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 658 | } |
| 659 | |
| 660 | { |
| 661 | int ret = 0; |
Pawel Lebioda | 3eed8c0 | 2014-05-14 19:20:27 +0200 | [diff] [blame] | 662 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 663 | ret = usb_hcd_check_unlink_urb(hcd, urb, status); |
| 664 | if (ret) { |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 665 | spin_unlock_irqrestore(&vhci->lock, flags); |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 666 | return ret; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 667 | } |
| 668 | } |
| 669 | |
| 670 | /* send unlink request here? */ |
| 671 | vdev = priv->vdev; |
| 672 | |
| 673 | if (!vdev->ud.tcp_socket) { |
| 674 | /* tcp connection is closed */ |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 675 | spin_lock(&vdev->priv_lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 676 | |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 677 | pr_info("device %p seems to be disconnected\n", vdev); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 678 | list_del(&priv->list); |
| 679 | kfree(priv); |
| 680 | urb->hcpriv = NULL; |
| 681 | |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 682 | spin_unlock(&vdev->priv_lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 683 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 684 | /* |
| 685 | * If tcp connection is alive, we have sent CMD_UNLINK. |
| 686 | * vhci_rx will receive RET_UNLINK and give back the URB. |
| 687 | * Otherwise, we give back it here. |
| 688 | */ |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 689 | pr_info("gives back urb %p\n", urb); |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 690 | |
| 691 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
| 692 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 693 | spin_unlock_irqrestore(&vhci->lock, flags); |
| 694 | usb_hcd_giveback_urb(vhci_to_hcd(vhci), urb, urb->status); |
| 695 | spin_lock_irqsave(&vhci->lock, flags); |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 696 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 697 | } else { |
| 698 | /* tcp connection is alive */ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 699 | struct vhci_unlink *unlink; |
| 700 | |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 701 | spin_lock(&vdev->priv_lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 702 | |
| 703 | /* setup CMD_UNLINK pdu */ |
| 704 | unlink = kzalloc(sizeof(struct vhci_unlink), GFP_ATOMIC); |
| 705 | if (!unlink) { |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 706 | spin_unlock(&vdev->priv_lock); |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 707 | spin_unlock_irqrestore(&vhci->lock, flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 708 | usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC); |
| 709 | return -ENOMEM; |
| 710 | } |
| 711 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 712 | unlink->seqnum = atomic_inc_return(&vhci->seqnum); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 713 | if (unlink->seqnum == 0xffff) |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 714 | pr_info("seqnum max\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 715 | |
| 716 | unlink->unlink_seqnum = priv->seqnum; |
| 717 | |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 718 | pr_info("device %p seems to be still connected\n", vdev); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 719 | |
| 720 | /* send cmd_unlink and try to cancel the pending URB in the |
| 721 | * peer */ |
| 722 | list_add_tail(&unlink->list, &vdev->unlink_tx); |
| 723 | wake_up(&vdev->waitq_tx); |
| 724 | |
Harvey Yang | 50b66b5 | 2013-01-22 13:31:31 +0800 | [diff] [blame] | 725 | spin_unlock(&vdev->priv_lock); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 726 | } |
| 727 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 728 | spin_unlock_irqrestore(&vhci->lock, flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 729 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 730 | usbip_dbg_vhci_hc("leave\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 731 | return 0; |
| 732 | } |
| 733 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 734 | static void vhci_device_unlink_cleanup(struct vhci_device *vdev) |
| 735 | { |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 736 | struct vhci_hcd *vhci = vdev_to_vhci(vdev); |
| 737 | struct usb_hcd *hcd = vhci_to_hcd(vhci); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 738 | struct vhci_unlink *unlink, *tmp; |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 739 | unsigned long flags; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 740 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 741 | spin_lock_irqsave(&vhci->lock, flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 742 | spin_lock(&vdev->priv_lock); |
| 743 | |
| 744 | list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 745 | pr_info("unlink cleanup tx %lu\n", unlink->unlink_seqnum); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 746 | list_del(&unlink->list); |
| 747 | kfree(unlink); |
| 748 | } |
| 749 | |
Bernard Blackham | 236742d | 2012-09-06 20:25:04 +1000 | [diff] [blame] | 750 | while (!list_empty(&vdev->unlink_rx)) { |
Max Vozeler | b92a5e2 | 2011-01-12 15:02:01 +0200 | [diff] [blame] | 751 | struct urb *urb; |
| 752 | |
Bernard Blackham | 236742d | 2012-09-06 20:25:04 +1000 | [diff] [blame] | 753 | unlink = list_first_entry(&vdev->unlink_rx, struct vhci_unlink, |
| 754 | list); |
| 755 | |
Max Vozeler | b92a5e2 | 2011-01-12 15:02:01 +0200 | [diff] [blame] | 756 | /* give back URB of unanswered unlink request */ |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 757 | pr_info("unlink cleanup rx %lu\n", unlink->unlink_seqnum); |
Max Vozeler | b92a5e2 | 2011-01-12 15:02:01 +0200 | [diff] [blame] | 758 | |
| 759 | urb = pickup_urb_and_free_priv(vdev, unlink->unlink_seqnum); |
| 760 | if (!urb) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 761 | pr_info("the urb (seqnum %lu) was already given back\n", |
| 762 | unlink->unlink_seqnum); |
Max Vozeler | b92a5e2 | 2011-01-12 15:02:01 +0200 | [diff] [blame] | 763 | list_del(&unlink->list); |
| 764 | kfree(unlink); |
| 765 | continue; |
| 766 | } |
| 767 | |
| 768 | urb->status = -ENODEV; |
| 769 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 770 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
Bernard Blackham | 236742d | 2012-09-06 20:25:04 +1000 | [diff] [blame] | 771 | |
| 772 | list_del(&unlink->list); |
| 773 | |
| 774 | spin_unlock(&vdev->priv_lock); |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 775 | spin_unlock_irqrestore(&vhci->lock, flags); |
Max Vozeler | b92a5e2 | 2011-01-12 15:02:01 +0200 | [diff] [blame] | 776 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 777 | usb_hcd_giveback_urb(hcd, urb, urb->status); |
Max Vozeler | b92a5e2 | 2011-01-12 15:02:01 +0200 | [diff] [blame] | 778 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 779 | spin_lock_irqsave(&vhci->lock, flags); |
Bernard Blackham | 236742d | 2012-09-06 20:25:04 +1000 | [diff] [blame] | 780 | spin_lock(&vdev->priv_lock); |
| 781 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 782 | kfree(unlink); |
| 783 | } |
| 784 | |
| 785 | spin_unlock(&vdev->priv_lock); |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 786 | spin_unlock_irqrestore(&vhci->lock, flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 787 | } |
| 788 | |
| 789 | /* |
| 790 | * The important thing is that only one context begins cleanup. |
| 791 | * This is why error handling and cleanup become simple. |
| 792 | * We do not want to consider race condition as possible. |
| 793 | */ |
| 794 | static void vhci_shutdown_connection(struct usbip_device *ud) |
| 795 | { |
| 796 | struct vhci_device *vdev = container_of(ud, struct vhci_device, ud); |
| 797 | |
| 798 | /* need this? see stub_dev.c */ |
| 799 | if (ud->tcp_socket) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 800 | pr_debug("shutdown tcp_socket %p\n", ud->tcp_socket); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 801 | kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR); |
| 802 | } |
| 803 | |
Bart Westgeest | c7f0089 | 2012-10-10 13:34:27 -0400 | [diff] [blame] | 804 | /* kill threads related to this sdev */ |
navin | cbf7d12 | 2012-09-19 17:04:51 +0530 | [diff] [blame] | 805 | if (vdev->ud.tcp_rx) { |
Oleg Nesterov | ba46ce3 | 2012-03-13 19:07:18 +0100 | [diff] [blame] | 806 | kthread_stop_put(vdev->ud.tcp_rx); |
navin | cbf7d12 | 2012-09-19 17:04:51 +0530 | [diff] [blame] | 807 | vdev->ud.tcp_rx = NULL; |
| 808 | } |
| 809 | if (vdev->ud.tcp_tx) { |
Oleg Nesterov | ba46ce3 | 2012-03-13 19:07:18 +0100 | [diff] [blame] | 810 | kthread_stop_put(vdev->ud.tcp_tx); |
navin | cbf7d12 | 2012-09-19 17:04:51 +0530 | [diff] [blame] | 811 | vdev->ud.tcp_tx = NULL; |
| 812 | } |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 813 | pr_info("stop threads\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 814 | |
| 815 | /* active connection is closed */ |
Bernard Blackham | 3d0a2a2 | 2012-10-22 06:45:00 +1100 | [diff] [blame] | 816 | if (vdev->ud.tcp_socket) { |
Al Viro | 964ea96 | 2014-03-05 20:33:08 -0500 | [diff] [blame] | 817 | sockfd_put(vdev->ud.tcp_socket); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 818 | vdev->ud.tcp_socket = NULL; |
| 819 | } |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 820 | pr_info("release socket\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 821 | |
| 822 | vhci_device_unlink_cleanup(vdev); |
| 823 | |
| 824 | /* |
| 825 | * rh_port_disconnect() is a trigger of ... |
| 826 | * usb_disable_device(): |
| 827 | * disable all the endpoints for a USB device. |
| 828 | * usb_disable_endpoint(): |
| 829 | * disable endpoints. pending urbs are unlinked(dequeued). |
| 830 | * |
| 831 | * NOTE: After calling rh_port_disconnect(), the USB device drivers of a |
Justin P. Mattock | 4ec2601 | 2012-08-06 08:00:27 -0700 | [diff] [blame] | 832 | * detached device should release used urbs in a cleanup function (i.e. |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 833 | * xxx_disconnect()). Therefore, vhci_hcd does not need to release |
| 834 | * pushed urbs and their private data in this function. |
| 835 | * |
Justin P. Mattock | 4ec2601 | 2012-08-06 08:00:27 -0700 | [diff] [blame] | 836 | * NOTE: vhci_dequeue() must be considered carefully. When shutting down |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 837 | * a connection, vhci_shutdown_connection() expects vhci_dequeue() |
| 838 | * gives back pushed urbs and frees their private data by request of |
| 839 | * the cleanup function of a USB driver. When unlinking a urb with an |
| 840 | * active connection, vhci_dequeue() does not give back the urb which |
| 841 | * is actually given back by vhci_rx after receiving its return pdu. |
| 842 | * |
| 843 | */ |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 844 | rh_port_disconnect(vdev); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 845 | |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 846 | pr_info("disconnect device\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 847 | } |
| 848 | |
| 849 | |
| 850 | static void vhci_device_reset(struct usbip_device *ud) |
| 851 | { |
| 852 | struct vhci_device *vdev = container_of(ud, struct vhci_device, ud); |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 853 | unsigned long flags; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 854 | |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 855 | spin_lock_irqsave(&ud->lock, flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 856 | |
| 857 | vdev->speed = 0; |
| 858 | vdev->devid = 0; |
| 859 | |
Markus Elfring | 03f3df8 | 2014-11-21 16:33:18 +0100 | [diff] [blame] | 860 | usb_put_dev(vdev->udev); |
Max Vozeler | 7606ee8 | 2011-01-12 15:02:00 +0200 | [diff] [blame] | 861 | vdev->udev = NULL; |
| 862 | |
Bernard Blackham | 3d0a2a2 | 2012-10-22 06:45:00 +1100 | [diff] [blame] | 863 | if (ud->tcp_socket) { |
Al Viro | 964ea96 | 2014-03-05 20:33:08 -0500 | [diff] [blame] | 864 | sockfd_put(ud->tcp_socket); |
Bernard Blackham | 3d0a2a2 | 2012-10-22 06:45:00 +1100 | [diff] [blame] | 865 | ud->tcp_socket = NULL; |
| 866 | } |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 867 | ud->status = VDEV_ST_NULL; |
| 868 | |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 869 | spin_unlock_irqrestore(&ud->lock, flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 870 | } |
| 871 | |
| 872 | static void vhci_device_unusable(struct usbip_device *ud) |
| 873 | { |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 874 | unsigned long flags; |
| 875 | |
| 876 | spin_lock_irqsave(&ud->lock, flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 877 | ud->status = VDEV_ST_ERROR; |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 878 | spin_unlock_irqrestore(&ud->lock, flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 879 | } |
| 880 | |
| 881 | static void vhci_device_init(struct vhci_device *vdev) |
| 882 | { |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 883 | memset(vdev, 0, sizeof(struct vhci_device)); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 884 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 885 | vdev->ud.side = USBIP_VHCI; |
| 886 | vdev->ud.status = VDEV_ST_NULL; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 887 | spin_lock_init(&vdev->ud.lock); |
| 888 | |
| 889 | INIT_LIST_HEAD(&vdev->priv_rx); |
| 890 | INIT_LIST_HEAD(&vdev->priv_tx); |
| 891 | INIT_LIST_HEAD(&vdev->unlink_tx); |
| 892 | INIT_LIST_HEAD(&vdev->unlink_rx); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 893 | spin_lock_init(&vdev->priv_lock); |
| 894 | |
| 895 | init_waitqueue_head(&vdev->waitq_tx); |
| 896 | |
| 897 | vdev->ud.eh_ops.shutdown = vhci_shutdown_connection; |
| 898 | vdev->ud.eh_ops.reset = vhci_device_reset; |
| 899 | vdev->ud.eh_ops.unusable = vhci_device_unusable; |
| 900 | |
| 901 | usbip_start_eh(&vdev->ud); |
| 902 | } |
| 903 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 904 | static int hcd_name_to_id(const char *name) |
| 905 | { |
| 906 | char *c; |
| 907 | long val; |
| 908 | int ret; |
| 909 | |
| 910 | c = strchr(name, '.'); |
| 911 | if (c == NULL) |
| 912 | return 0; |
| 913 | |
| 914 | ret = kstrtol(c+1, 10, &val); |
| 915 | if (ret < 0) |
| 916 | return ret; |
| 917 | |
| 918 | return val; |
| 919 | } |
| 920 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 921 | static int vhci_start(struct usb_hcd *hcd) |
| 922 | { |
| 923 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 924 | int id, rhport; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 925 | int err = 0; |
| 926 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 927 | usbip_dbg_vhci_hc("enter vhci_start\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 928 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 929 | /* initialize private data of usb_hcd */ |
| 930 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 931 | for (rhport = 0; rhport < VHCI_HC_PORTS; rhport++) { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 932 | struct vhci_device *vdev = &vhci->vdev[rhport]; |
Pawel Lebioda | 3eed8c0 | 2014-05-14 19:20:27 +0200 | [diff] [blame] | 933 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 934 | vhci_device_init(vdev); |
| 935 | vdev->rhport = rhport; |
| 936 | } |
| 937 | |
| 938 | atomic_set(&vhci->seqnum, 0); |
| 939 | spin_lock_init(&vhci->lock); |
| 940 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 941 | hcd->power_budget = 0; /* no limit */ |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 942 | hcd->uses_new_polling = 1; |
| 943 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 944 | id = hcd_name_to_id(hcd_name(hcd)); |
| 945 | if (id < 0) { |
| 946 | pr_err("invalid vhci name %s\n", hcd_name(hcd)); |
| 947 | return -EINVAL; |
| 948 | } |
| 949 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 950 | /* vhci_hcd is now ready to be controlled through sysfs */ |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 951 | if (id == 0) { |
| 952 | err = vhci_init_attr_group(); |
| 953 | if (err) { |
| 954 | pr_err("init attr group\n"); |
| 955 | return err; |
| 956 | } |
| 957 | err = sysfs_create_group(&hcd_dev(hcd)->kobj, &vhci_attr_group); |
| 958 | if (err) { |
| 959 | pr_err("create sysfs files\n"); |
| 960 | vhci_finish_attr_group(); |
| 961 | return err; |
| 962 | } |
| 963 | pr_info("created sysfs %s\n", hcd_name(hcd)); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 964 | } |
| 965 | |
| 966 | return 0; |
| 967 | } |
| 968 | |
| 969 | static void vhci_stop(struct usb_hcd *hcd) |
| 970 | { |
| 971 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 972 | int id, rhport; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 973 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 974 | usbip_dbg_vhci_hc("stop VHCI controller\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 975 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 976 | /* 1. remove the userland interface of vhci_hcd */ |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 977 | id = hcd_name_to_id(hcd_name(hcd)); |
| 978 | if (id == 0) { |
| 979 | sysfs_remove_group(&hcd_dev(hcd)->kobj, &vhci_attr_group); |
| 980 | vhci_finish_attr_group(); |
| 981 | } |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 982 | |
| 983 | /* 2. shutdown all the ports of vhci_hcd */ |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 984 | for (rhport = 0; rhport < VHCI_HC_PORTS; rhport++) { |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 985 | struct vhci_device *vdev = &vhci->vdev[rhport]; |
| 986 | |
| 987 | usbip_event_add(&vdev->ud, VDEV_EVENT_REMOVED); |
| 988 | usbip_stop_eh(&vdev->ud); |
| 989 | } |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 990 | } |
| 991 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 992 | static int vhci_get_frame_number(struct usb_hcd *hcd) |
| 993 | { |
Greg Kroah-Hartman | 083d5ad | 2016-06-14 13:41:07 -0700 | [diff] [blame] | 994 | dev_err_ratelimited(&hcd->self.root_hub->dev, "Not yet implemented\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 995 | return 0; |
| 996 | } |
| 997 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 998 | #ifdef CONFIG_PM |
| 999 | |
| 1000 | /* FIXME: suspend/resume */ |
| 1001 | static int vhci_bus_suspend(struct usb_hcd *hcd) |
| 1002 | { |
| 1003 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 1004 | unsigned long flags; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1005 | |
| 1006 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); |
| 1007 | |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 1008 | spin_lock_irqsave(&vhci->lock, flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1009 | hcd->state = HC_STATE_SUSPENDED; |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 1010 | spin_unlock_irqrestore(&vhci->lock, flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1011 | |
| 1012 | return 0; |
| 1013 | } |
| 1014 | |
| 1015 | static int vhci_bus_resume(struct usb_hcd *hcd) |
| 1016 | { |
| 1017 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); |
| 1018 | int rc = 0; |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 1019 | unsigned long flags; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1020 | |
| 1021 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); |
| 1022 | |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 1023 | spin_lock_irqsave(&vhci->lock, flags); |
Stefan Reif | c46cb54 | 2013-02-22 12:13:32 +0100 | [diff] [blame] | 1024 | if (!HCD_HW_ACCESSIBLE(hcd)) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1025 | rc = -ESHUTDOWN; |
Stefan Reif | c46cb54 | 2013-02-22 12:13:32 +0100 | [diff] [blame] | 1026 | else |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1027 | hcd->state = HC_STATE_RUNNING; |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 1028 | spin_unlock_irqrestore(&vhci->lock, flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1029 | |
matt mooney | 8735276 | 2011-05-19 21:36:56 -0700 | [diff] [blame] | 1030 | return rc; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1031 | } |
| 1032 | |
| 1033 | #else |
| 1034 | |
| 1035 | #define vhci_bus_suspend NULL |
| 1036 | #define vhci_bus_resume NULL |
| 1037 | #endif |
| 1038 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1039 | static struct hc_driver vhci_hc_driver = { |
| 1040 | .description = driver_name, |
| 1041 | .product_desc = driver_desc, |
| 1042 | .hcd_priv_size = sizeof(struct vhci_hcd), |
| 1043 | |
| 1044 | .flags = HCD_USB2, |
| 1045 | |
| 1046 | .start = vhci_start, |
Ruslan Pisarev | 0051268 | 2010-03-15 17:06:44 +0200 | [diff] [blame] | 1047 | .stop = vhci_stop, |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1048 | |
| 1049 | .urb_enqueue = vhci_urb_enqueue, |
| 1050 | .urb_dequeue = vhci_urb_dequeue, |
| 1051 | |
| 1052 | .get_frame_number = vhci_get_frame_number, |
| 1053 | |
| 1054 | .hub_status_data = vhci_hub_status, |
| 1055 | .hub_control = vhci_hub_control, |
| 1056 | .bus_suspend = vhci_bus_suspend, |
| 1057 | .bus_resume = vhci_bus_resume, |
| 1058 | }; |
| 1059 | |
| 1060 | static int vhci_hcd_probe(struct platform_device *pdev) |
| 1061 | { |
| 1062 | struct usb_hcd *hcd; |
| 1063 | int ret; |
| 1064 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 1065 | 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] | 1066 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1067 | /* |
| 1068 | * Allocate and initialize hcd. |
| 1069 | * Our private data is also allocated automatically. |
| 1070 | */ |
Kay Sievers | e913397 | 2008-10-30 01:59:32 +0100 | [diff] [blame] | 1071 | 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] | 1072 | if (!hcd) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 1073 | pr_err("create hcd failed\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1074 | return -ENOMEM; |
| 1075 | } |
Alan Stern | cee6a26 | 2011-05-02 14:21:44 -0400 | [diff] [blame] | 1076 | hcd->has_tt = 1; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1077 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1078 | /* |
| 1079 | * Finish generic HCD structure initialization and register. |
| 1080 | * Call the driver's reset() and start() routines. |
| 1081 | */ |
| 1082 | ret = usb_add_hcd(hcd, 0, 0); |
| 1083 | if (ret != 0) { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 1084 | pr_err("usb_add_hcd failed %d\n", ret); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1085 | usb_put_hcd(hcd); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1086 | return ret; |
| 1087 | } |
| 1088 | |
Brian G. Merrell | b8868e4 | 2009-07-21 00:46:13 -0600 | [diff] [blame] | 1089 | usbip_dbg_vhci_hc("bye\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1090 | return 0; |
| 1091 | } |
| 1092 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1093 | static int vhci_hcd_remove(struct platform_device *pdev) |
| 1094 | { |
| 1095 | struct usb_hcd *hcd; |
| 1096 | |
| 1097 | hcd = platform_get_drvdata(pdev); |
| 1098 | if (!hcd) |
| 1099 | return 0; |
| 1100 | |
| 1101 | /* |
| 1102 | * Disconnects the root hub, |
| 1103 | * then reverses the effects of usb_add_hcd(), |
| 1104 | * invoking the HCD's stop() methods. |
| 1105 | */ |
| 1106 | usb_remove_hcd(hcd); |
| 1107 | usb_put_hcd(hcd); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1108 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1109 | return 0; |
| 1110 | } |
| 1111 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1112 | #ifdef CONFIG_PM |
| 1113 | |
| 1114 | /* what should happen for USB/IP under suspend/resume? */ |
| 1115 | static int vhci_hcd_suspend(struct platform_device *pdev, pm_message_t state) |
| 1116 | { |
| 1117 | struct usb_hcd *hcd; |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 1118 | struct vhci_hcd *vhci; |
| 1119 | int rhport; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1120 | int connected = 0; |
| 1121 | int ret = 0; |
Andrew Goodbody | 2161979 | 2016-02-02 17:36:39 +0000 | [diff] [blame] | 1122 | unsigned long flags; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1123 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1124 | hcd = platform_get_drvdata(pdev); |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 1125 | if (!hcd) |
| 1126 | return 0; |
| 1127 | vhci = hcd_to_vhci(hcd); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1128 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 1129 | spin_lock_irqsave(&vhci->lock, flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1130 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 1131 | for (rhport = 0; rhport < VHCI_HC_PORTS; rhport++) |
| 1132 | if (vhci->port_status[rhport] & USB_PORT_STAT_CONNECTION) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1133 | connected += 1; |
| 1134 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 1135 | spin_unlock_irqrestore(&vhci->lock, flags); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1136 | |
| 1137 | if (connected > 0) { |
Cédric Cabessa | 7923a65 | 2014-03-19 23:04:57 +0100 | [diff] [blame] | 1138 | dev_info(&pdev->dev, |
| 1139 | "We have %d active connection%s. Do not suspend.\n", |
| 1140 | connected, (connected == 1 ? "" : "s")); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1141 | ret = -EBUSY; |
| 1142 | } else { |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 1143 | dev_info(&pdev->dev, "suspend vhci_hcd"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1144 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
| 1145 | } |
| 1146 | |
| 1147 | return ret; |
| 1148 | } |
| 1149 | |
| 1150 | static int vhci_hcd_resume(struct platform_device *pdev) |
| 1151 | { |
| 1152 | struct usb_hcd *hcd; |
| 1153 | |
| 1154 | dev_dbg(&pdev->dev, "%s\n", __func__); |
| 1155 | |
| 1156 | hcd = platform_get_drvdata(pdev); |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 1157 | if (!hcd) |
| 1158 | return 0; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1159 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
| 1160 | usb_hcd_poll_rh_status(hcd); |
| 1161 | |
| 1162 | return 0; |
| 1163 | } |
| 1164 | |
| 1165 | #else |
| 1166 | |
| 1167 | #define vhci_hcd_suspend NULL |
| 1168 | #define vhci_hcd_resume NULL |
| 1169 | |
| 1170 | #endif |
| 1171 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1172 | static struct platform_driver vhci_driver = { |
| 1173 | .probe = vhci_hcd_probe, |
Bill Pemberton | f307da9 | 2012-11-19 13:21:02 -0500 | [diff] [blame] | 1174 | .remove = vhci_hcd_remove, |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1175 | .suspend = vhci_hcd_suspend, |
| 1176 | .resume = vhci_hcd_resume, |
| 1177 | .driver = { |
Geert Uytterhoeven | 1c126bc | 2013-11-12 20:07:19 +0100 | [diff] [blame] | 1178 | .name = driver_name, |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1179 | }, |
| 1180 | }; |
| 1181 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 1182 | static int add_platform_device(int id) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1183 | { |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 1184 | struct platform_device *pdev; |
| 1185 | int dev_nr; |
| 1186 | |
| 1187 | if (id == 0) |
| 1188 | dev_nr = -1; |
| 1189 | else |
| 1190 | dev_nr = id; |
| 1191 | |
| 1192 | pdev = platform_device_register_simple(driver_name, dev_nr, NULL, 0); |
Wei Yongjun | 6e95805 | 2016-08-12 11:22:22 +0000 | [diff] [blame] | 1193 | if (IS_ERR(pdev)) |
| 1194 | return PTR_ERR(pdev); |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 1195 | |
| 1196 | *(vhci_pdevs + id) = pdev; |
| 1197 | return 0; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1198 | } |
| 1199 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 1200 | static void del_platform_devices(void) |
| 1201 | { |
| 1202 | struct platform_device *pdev; |
| 1203 | int i; |
| 1204 | |
| 1205 | for (i = 0; i < vhci_num_controllers; i++) { |
| 1206 | pdev = *(vhci_pdevs + i); |
| 1207 | if (pdev != NULL) |
| 1208 | platform_device_unregister(pdev); |
| 1209 | *(vhci_pdevs + i) = NULL; |
| 1210 | } |
| 1211 | sysfs_remove_link(&platform_bus.kobj, driver_name); |
| 1212 | } |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1213 | |
matt mooney | 0392bbb | 2011-05-19 21:37:06 -0700 | [diff] [blame] | 1214 | static int __init vhci_hcd_init(void) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1215 | { |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 1216 | int i, ret; |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1217 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1218 | if (usb_disabled()) |
| 1219 | return -ENODEV; |
| 1220 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 1221 | if (vhci_num_controllers < 1) |
| 1222 | vhci_num_controllers = 1; |
| 1223 | |
| 1224 | vhci_pdevs = kcalloc(vhci_num_controllers, sizeof(void *), GFP_KERNEL); |
| 1225 | if (vhci_pdevs == NULL) |
| 1226 | return -ENOMEM; |
| 1227 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1228 | ret = platform_driver_register(&vhci_driver); |
navin patidar | 4d42195 | 2013-09-10 10:43:39 +0530 | [diff] [blame] | 1229 | if (ret) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1230 | goto err_driver_register; |
| 1231 | |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 1232 | for (i = 0; i < vhci_num_controllers; i++) { |
| 1233 | ret = add_platform_device(i); |
| 1234 | if (ret) |
| 1235 | goto err_platform_device_register; |
| 1236 | } |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1237 | |
matt mooney | 1a4b6f6 | 2011-05-19 16:47:32 -0700 | [diff] [blame] | 1238 | pr_info(DRIVER_DESC " v" USBIP_VERSION "\n"); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1239 | return ret; |
| 1240 | |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1241 | err_platform_device_register: |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 1242 | del_platform_devices(); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1243 | platform_driver_unregister(&vhci_driver); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1244 | err_driver_register: |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 1245 | kfree(vhci_pdevs); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1246 | return ret; |
| 1247 | } |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1248 | |
matt mooney | 0392bbb | 2011-05-19 21:37:06 -0700 | [diff] [blame] | 1249 | static void __exit vhci_hcd_exit(void) |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1250 | { |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 1251 | del_platform_devices(); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1252 | platform_driver_unregister(&vhci_driver); |
Nobuo Iwata | 0775a9c | 2016-06-13 11:33:40 +0900 | [diff] [blame] | 1253 | kfree(vhci_pdevs); |
Takahiro Hirofuchi | 04679b3 | 2008-07-09 14:56:51 -0600 | [diff] [blame] | 1254 | } |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 1255 | |
matt mooney | 0392bbb | 2011-05-19 21:37:06 -0700 | [diff] [blame] | 1256 | module_init(vhci_hcd_init); |
| 1257 | module_exit(vhci_hcd_exit); |
matt mooney | 071d1d4 | 2011-05-06 03:47:50 -0700 | [diff] [blame] | 1258 | |
| 1259 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 1260 | MODULE_DESCRIPTION(DRIVER_DESC); |
matt mooney | 4ce0a41 | 2011-05-06 03:47:56 -0700 | [diff] [blame] | 1261 | MODULE_LICENSE("GPL"); |
matt mooney | 6973c6f | 2011-05-11 01:54:14 -0700 | [diff] [blame] | 1262 | MODULE_VERSION(USBIP_VERSION); |