--- /dev/null
+From 04679b3489e048cd5dae79e050a3afed8e4e42b6 Mon Sep 17 00:00:00 2001
+From: Takahiro Hirofuchi <hirofuchi@users.sourceforge.net>
+Date: Wed, 9 Jul 2008 14:56:51 -0600
+Subject: [PATCH 12/23] Staging: USB/IP: add client driver
+Patch-mainline: 2.6.28
+
+This adds the USB IP client driver
+
+Brian Merrell cleaned up a lot of this code and submitted it for
+inclusion. Greg also did a lot of cleanup.
+
+Signed-off-by: Brian G. Merrell <bgmerrell@novell.com>
+Cc: Takahiro Hirofuchi <hirofuchi@users.sourceforge.net>
+Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
+---
+ drivers/staging/usbip/Kconfig | 11 +
+ drivers/staging/usbip/Makefile | 3 +
+ drivers/staging/usbip/vhci.h | 142 ++++
+ drivers/staging/usbip/vhci_hcd.c | 1275 ++++++++++++++++++++++++++++++++++++
+ drivers/staging/usbip/vhci_rx.c | 251 +++++++
+ drivers/staging/usbip/vhci_sysfs.c | 250 +++++++
+ drivers/staging/usbip/vhci_tx.c | 239 +++++++
+ 7 files changed, 2171 insertions(+), 0 deletions(-)
+ create mode 100644 drivers/staging/usbip/vhci.h
+ create mode 100644 drivers/staging/usbip/vhci_hcd.c
+ create mode 100644 drivers/staging/usbip/vhci_rx.c
+ create mode 100644 drivers/staging/usbip/vhci_sysfs.c
+ create mode 100644 drivers/staging/usbip/vhci_tx.c
+
+diff --git a/drivers/staging/usbip/Kconfig b/drivers/staging/usbip/Kconfig
+index 37efb5e..c4d68e1 100644
+--- a/drivers/staging/usbip/Kconfig
++++ b/drivers/staging/usbip/Kconfig
+@@ -12,3 +12,14 @@ config USB_IP_COMMON
+ module will be called usbip_common_mod.
+
+ If unsure, say N.
++
++config USB_IP_VHCI_HCD
++ tristate "USB IP client driver"
++ depends on USB_IP_COMMON
++ default N
++ ---help---
++ This enables the USB IP host controller driver which will
++ run on the client machine.
++
++ To compile this driver as a module, choose M here: the
++ module will be called vhci_hcd.
+diff --git a/drivers/staging/usbip/Makefile b/drivers/staging/usbip/Makefile
+index ce925ca..6ef4c39 100644
+--- a/drivers/staging/usbip/Makefile
++++ b/drivers/staging/usbip/Makefile
+@@ -1,6 +1,9 @@
+ obj-$(CONFIG_USB_IP_COMMON) += usbip_common_mod.o
+ usbip_common_mod-objs := usbip_common.o usbip_event.o
+
++obj-$(CONFIG_USB_IP_VHCI_HCD) += vhci-hcd.o
++vhci-hcd-objs := vhci_sysfs.o vhci_tx.o vhci_rx.o vhci_hcd.o
++
+ ifeq ($(CONFIG_USB_DEBUG),y)
+ EXTRA_CFLAGS += -DDEBUG
+ endif
+diff --git a/drivers/staging/usbip/vhci.h b/drivers/staging/usbip/vhci.h
+new file mode 100644
+index 0000000..5e37517
+--- /dev/null
++++ b/drivers/staging/usbip/vhci.h
+@@ -0,0 +1,142 @@
++/*
++ * Copyright (C) 2003-2008 Takahiro Hirofuchi
++ *
++ * This is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
++ * USA.
++ */
++
++#include <linux/platform_device.h>
++#include "../../usb/core/hcd.h"
++
++
++struct vhci_device {
++ struct usb_device *udev;
++
++ /*
++ * devid specifies a remote usb device uniquely instead
++ * of combination of busnum and devnum.
++ */
++ __u32 devid;
++
++ /* speed of a remote device */
++ enum usb_device_speed speed;
++
++ /* vhci root-hub port to which this device is attached */
++ __u32 rhport;
++
++ struct usbip_device ud;
++
++
++ /* lock for the below link lists */
++ spinlock_t priv_lock;
++
++ /* vhci_priv is linked to one of them. */
++ struct list_head priv_tx;
++ struct list_head priv_rx;
++
++ /* vhci_unlink is linked to one of them */
++ struct list_head unlink_tx;
++ struct list_head unlink_rx;
++
++ /* vhci_tx thread sleeps for this queue */
++ wait_queue_head_t waitq_tx;
++};
++
++
++/* urb->hcpriv, use container_of() */
++struct vhci_priv {
++ unsigned long seqnum;
++ struct list_head list;
++
++ struct vhci_device *vdev;
++ struct urb *urb;
++};
++
++
++struct vhci_unlink {
++ /* seqnum of this request */
++ unsigned long seqnum;
++
++ struct list_head list;
++
++ /* seqnum of the unlink target */
++ unsigned long unlink_seqnum;
++};
++
++/*
++ * The number of ports is less than 16 ?
++ * USB_MAXCHILDREN is statically defined to 16 in usb.h. Its maximum value
++ * would be 31 because the event_bits[1] of struct usb_hub is defined as
++ * unsigned long in hub.h
++ */
++#define VHCI_NPORTS 8
++
++/* for usb_bus.hcpriv */
++struct vhci_hcd {
++ spinlock_t lock;
++
++ u32 port_status[VHCI_NPORTS];
++
++ unsigned resuming:1;
++ unsigned long re_timeout;
++
++ atomic_t seqnum;
++
++ /*
++ * NOTE:
++ * wIndex shows the port number and begins from 1.
++ * But, the index of this array begins from 0.
++ */
++ struct vhci_device vdev[VHCI_NPORTS];
++
++ /* vhci_device which has not been assiged its address yet */
++ int pending_port;
++};
++
++
++extern struct vhci_hcd *the_controller;
++extern struct attribute_group dev_attr_group;
++
++
++/*-------------------------------------------------------------------------*/
++/* prototype declaration */
++
++/* vhci_hcd.c */
++void rh_port_connect(int rhport, enum usb_device_speed speed);
++void rh_port_disconnect(int rhport);
++void vhci_rx_loop(struct usbip_task *ut);
++void vhci_tx_loop(struct usbip_task *ut);
++
++#define hardware (&the_controller->pdev.dev)
++
++static inline struct vhci_device *port_to_vdev(__u32 port)
++{
++ return &the_controller->vdev[port];
++}
++
++static inline struct vhci_hcd *hcd_to_vhci(struct usb_hcd *hcd)
++{
++ return (struct vhci_hcd *) (hcd->hcd_priv);
++}
++
++static inline struct usb_hcd *vhci_to_hcd(struct vhci_hcd *vhci)
++{
++ return container_of((void *) vhci, struct usb_hcd, hcd_priv);
++}
++
++static inline struct device *vhci_dev(struct vhci_hcd *vhci)
++{
++ return vhci_to_hcd(vhci)->self.controller;
++}
+diff --git a/drivers/staging/usbip/vhci_hcd.c b/drivers/staging/usbip/vhci_hcd.c
+new file mode 100644
+index 0000000..5b5a2e3
+--- /dev/null
++++ b/drivers/staging/usbip/vhci_hcd.c
+@@ -0,0 +1,1275 @@
++/*
++ * Copyright (C) 2003-2008 Takahiro Hirofuchi
++ *
++ * This is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
++ * USA.
++ */
++
++
++#include "usbip_common.h"
++#include "vhci.h"
++
++#define DRIVER_VERSION "1.0"
++#define DRIVER_AUTHOR "Takahiro Hirofuchi"
++#define DRIVER_DESC "Virtual Host Controller Interface Driver for USB/IP"
++#define DRIVER_LICENCE "GPL"
++MODULE_AUTHOR(DRIVER_AUTHOR);
++MODULE_DESCRIPTION(DRIVER_DESC);
++MODULE_LICENSE(DRIVER_LICENCE);
++
++
++
++/*
++ * TODO
++ * - update root hub emulation
++ * - move the emulation code to userland ?
++ * porting to other operating systems
++ * minimize kernel code
++ * - add suspend/resume code
++ * - clean up everything
++ */
++
++
++/* See usb gadget dummy hcd */
++
++
++static int vhci_hub_status(struct usb_hcd *hcd, char *buff);
++static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
++ u16 wIndex, char *buff, u16 wLength);
++static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
++ gfp_t mem_flags);
++static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status);
++static int vhci_start(struct usb_hcd *vhci_hcd);
++static void vhci_stop(struct usb_hcd *hcd);
++static int vhci_get_frame_number(struct usb_hcd *hcd);
++
++static const char driver_name[] = "vhci_hcd";
++static const char driver_desc[] = "USB/IP Virtual Host Contoroller";
++
++struct vhci_hcd *the_controller;
++
++static const char *bit_desc[] = {
++ "CONNECTION", /*0*/
++ "ENABLE", /*1*/
++ "SUSPEND", /*2*/
++ "OVER_CURRENT", /*3*/
++ "RESET", /*4*/
++ "R5", /*5*/
++ "R6", /*6*/
++ "R7", /*7*/
++ "POWER", /*8*/
++ "LOWSPEED", /*9*/
++ "HIGHSPEED", /*10*/
++ "PORT_TEST", /*11*/
++ "INDICATOR", /*12*/
++ "R13", /*13*/
++ "R14", /*14*/
++ "R15", /*15*/
++ "C_CONNECTION", /*16*/
++ "C_ENABLE", /*17*/
++ "C_SUSPEND", /*18*/
++ "C_OVER_CURRENT", /*19*/
++ "C_RESET", /*20*/
++ "R21", /*21*/
++ "R22", /*22*/
++ "R23", /*23*/
++ "R24", /*24*/
++ "R25", /*25*/
++ "R26", /*26*/
++ "R27", /*27*/
++ "R28", /*28*/
++ "R29", /*29*/
++ "R30", /*30*/
++ "R31", /*31*/
++};
++
++
++static void dump_port_status(u32 status)
++{
++ int i = 0;
++
++ printk(KERN_DEBUG "status %08x:", status);
++ for (i = 0; i < 32; i++) {
++ if (status & (1 << i))
++ printk(" %s", bit_desc[i]);
++ }
++
++ printk("\n");
++}
++
++
++
++void rh_port_connect(int rhport, enum usb_device_speed speed)
++{
++ unsigned long flags;
++
++ dbg_vhci_rh("rh_port_connect %d\n", rhport);
++
++ spin_lock_irqsave(&the_controller->lock, flags);
++
++ the_controller->port_status[rhport] |= USB_PORT_STAT_CONNECTION
++ | (1 << USB_PORT_FEAT_C_CONNECTION);
++
++ switch (speed) {
++ case USB_SPEED_HIGH:
++ the_controller->port_status[rhport] |= USB_PORT_STAT_HIGH_SPEED;
++ break;
++ case USB_SPEED_LOW:
++ the_controller->port_status[rhport] |= USB_PORT_STAT_LOW_SPEED;
++ break;
++ default:
++ break;
++ }
++
++ /* spin_lock(&the_controller->vdev[rhport].ud.lock);
++ * the_controller->vdev[rhport].ud.status = VDEV_CONNECT;
++ * spin_unlock(&the_controller->vdev[rhport].ud.lock); */
++
++ the_controller->pending_port = rhport;
++
++ spin_unlock_irqrestore(&the_controller->lock, flags);
++
++ usb_hcd_poll_rh_status(vhci_to_hcd(the_controller));
++}
++
++void rh_port_disconnect(int rhport)
++{
++ unsigned long flags;
++
++ dbg_vhci_rh("rh_port_disconnect %d\n", rhport);
++
++ spin_lock_irqsave(&the_controller->lock, flags);
++ /* stop_activity(dum, driver); */
++ the_controller->port_status[rhport] &= ~USB_PORT_STAT_CONNECTION;
++ the_controller->port_status[rhport] |=
++ (1 << USB_PORT_FEAT_C_CONNECTION);
++
++
++ /* not yet complete the disconnection
++ * spin_lock(&vdev->ud.lock);
++ * vdev->ud.status = VHC_ST_DISCONNECT;
++ * spin_unlock(&vdev->ud.lock); */
++
++ spin_unlock_irqrestore(&the_controller->lock, flags);
++}
++
++
++
++/*----------------------------------------------------------------------*/
++
++#define PORT_C_MASK \
++ ((USB_PORT_STAT_C_CONNECTION \
++ | USB_PORT_STAT_C_ENABLE \
++ | USB_PORT_STAT_C_SUSPEND \
++ | USB_PORT_STAT_C_OVERCURRENT \
++ | USB_PORT_STAT_C_RESET) << 16)
++
++/*
++ * This function is almostly the same as dummy_hcd.c:dummy_hub_status() without
++ * suspend/resume support. But, it is modified to provide multiple ports.
++ *
++ * @buf: a bitmap to show which port status has been changed.
++ * bit 0: reserved or used for another purpose?
++ * bit 1: the status of port 0 has been changed.
++ * bit 2: the status of port 1 has been changed.
++ * ...
++ * bit 7: the status of port 6 has been changed.
++ * bit 8: the status of port 7 has been changed.
++ * ...
++ * bit 15: the status of port 14 has been changed.
++ *
++ * So, the maximum number of ports is 31 ( port 0 to port 30) ?
++ *
++ * The return value is the actual transfered length in byte. If nothing has
++ * been changed, return 0. In the case that the number of ports is less than or
++ * equal to 6 (VHCI_NPORTS==7), return 1.
++ *
++ */
++static int vhci_hub_status(struct usb_hcd *hcd, char *buf)
++{
++ struct vhci_hcd *vhci;
++ unsigned long flags;
++ int retval = 0;
++
++ /* the enough buffer is allocated according to USB_MAXCHILDREN */
++ unsigned long *event_bits = (unsigned long *) buf;
++ int rhport;
++ int changed = 0;
++
++
++ *event_bits = 0;
++
++ vhci = hcd_to_vhci(hcd);
++
++ spin_lock_irqsave(&vhci->lock, flags);
++ if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
++ dbg_vhci_rh("hw accessible flag in on?\n");
++ goto done;
++ }
++
++ /* check pseudo status register for each port */
++ for (rhport = 0; rhport < VHCI_NPORTS; rhport++) {
++ if ((vhci->port_status[rhport] & PORT_C_MASK)) {
++ /* The status of a port has been changed, */
++ dbg_vhci_rh("port %d is changed\n", rhport);
++
++ *event_bits |= 1 << (rhport + 1);
++ changed = 1;
++ }
++ }
++
++ uinfo("changed %d\n", changed);
++
++ if (hcd->state == HC_STATE_SUSPENDED)
++ usb_hcd_resume_root_hub(hcd);
++
++ if (changed)
++ retval = 1 + (VHCI_NPORTS / 8);
++ else
++ retval = 0;
++
++done:
++ spin_unlock_irqrestore(&vhci->lock, flags);
++ return retval;
++}
++
++/* See hub_configure in hub.c */
++static inline void hub_descriptor(struct usb_hub_descriptor *desc)
++{
++ memset(desc, 0, sizeof(*desc));
++ desc->bDescriptorType = 0x29;
++ desc->bDescLength = 9;
++ desc->wHubCharacteristics = (__force __u16)
++ (__constant_cpu_to_le16(0x0001));
++ desc->bNbrPorts = VHCI_NPORTS;
++ desc->bitmap[0] = 0xff;
++ desc->bitmap[1] = 0xff;
++}
++
++static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
++ u16 wIndex, char *buf, u16 wLength)
++{
++ struct vhci_hcd *dum;
++ int retval = 0;
++ unsigned long flags;
++ int rhport;
++
++ u32 prev_port_status[VHCI_NPORTS];
++
++ if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
++ return -ETIMEDOUT;
++
++ /*
++ * NOTE:
++ * wIndex shows the port number and begins from 1.
++ */
++ dbg_vhci_rh("typeReq %x wValue %x wIndex %x\n", typeReq, wValue,
++ wIndex);
++ if (wIndex > VHCI_NPORTS)
++ printk(KERN_ERR "%s: invalid port number %d\n", __func__, wIndex);
++ rhport = ((__u8)(wIndex & 0x00ff)) - 1;
++
++ dum = hcd_to_vhci(hcd);
++
++ spin_lock_irqsave(&dum->lock, flags);
++
++ /* store old status and compare now and old later */
++ if (dbg_flag_vhci_rh) {
++ int i = 0;
++ for (i = 0; i < VHCI_NPORTS; i++)
++ prev_port_status[i] = dum->port_status[i];
++ }
++
++ switch (typeReq) {
++ case ClearHubFeature:
++ dbg_vhci_rh(" ClearHubFeature\n");
++ break;
++ case ClearPortFeature:
++ switch (wValue) {
++ case USB_PORT_FEAT_SUSPEND:
++ if (dum->port_status[rhport] & USB_PORT_STAT_SUSPEND) {
++ /* 20msec signaling */
++ dum->resuming = 1;
++ dum->re_timeout =
++ jiffies + msecs_to_jiffies(20);
++ }
++ break;
++ case USB_PORT_FEAT_POWER:
++ dbg_vhci_rh(" ClearPortFeature: USB_PORT_FEAT_POWER\n");
++ dum->port_status[rhport] = 0;
++ /* dum->address = 0; */
++ /* dum->hdev = 0; */
++ dum->resuming = 0;
++ break;
++ case USB_PORT_FEAT_C_RESET:
++ dbg_vhci_rh(" ClearPortFeature: "
++ "USB_PORT_FEAT_C_RESET\n");
++ switch (dum->vdev[rhport].speed) {
++ case USB_SPEED_HIGH:
++ dum->port_status[rhport] |=
++ USB_PORT_STAT_HIGH_SPEED;
++ break;
++ case USB_SPEED_LOW:
++ dum->port_status[rhport] |=
++ USB_PORT_STAT_LOW_SPEED;
++ break;
++ default:
++ break;
++ }
++ default:
++ dbg_vhci_rh(" ClearPortFeature: default %x\n", wValue);
++ dum->port_status[rhport] &= ~(1 << wValue);
++ }
++ break;
++ case GetHubDescriptor:
++ dbg_vhci_rh(" GetHubDescriptor\n");
++ hub_descriptor((struct usb_hub_descriptor *) buf);
++ break;
++ case GetHubStatus:
++ dbg_vhci_rh(" GetHubStatus\n");
++ *(__le32 *) buf = __constant_cpu_to_le32(0);
++ break;
++ case GetPortStatus:
++ dbg_vhci_rh(" GetPortStatus port %x\n", wIndex);
++ if (wIndex > VHCI_NPORTS || wIndex < 1) {
++ printk(KERN_ERR "%s: invalid port number %d\n",
++ __func__, wIndex);
++ retval = -EPIPE;
++ }
++
++ /* we do no care of resume. */
++
++ /* whoever resets or resumes must GetPortStatus to
++ * complete it!!
++ * */
++ if (dum->resuming && time_after(jiffies, dum->re_timeout)) {
++ printk(KERN_ERR "%s: not yet\n", __func__);
++ dum->port_status[rhport] |=
++ (1 << USB_PORT_FEAT_C_SUSPEND);
++ dum->port_status[rhport] &=
++ ~(1 << USB_PORT_FEAT_SUSPEND);
++ dum->resuming = 0;
++ dum->re_timeout = 0;
++ /* if (dum->driver && dum->driver->resume) {
++ * spin_unlock (&dum->lock);
++ * dum->driver->resume (&dum->gadget);
++ * spin_lock (&dum->lock);
++ * } */
++ }
++
++ if ((dum->port_status[rhport] & (1 << USB_PORT_FEAT_RESET)) !=
++ 0 && time_after(jiffies, dum->re_timeout)) {
++ dum->port_status[rhport] |=
++ (1 << USB_PORT_FEAT_C_RESET);
++ dum->port_status[rhport] &=
++ ~(1 << USB_PORT_FEAT_RESET);
++ dum->re_timeout = 0;
++
++ if (dum->vdev[rhport].ud.status ==
++ VDEV_ST_NOTASSIGNED) {
++ dbg_vhci_rh(" enable rhport %d (status %u)\n",
++ rhport,
++ dum->vdev[rhport].ud.status);
++ dum->port_status[rhport] |=
++ USB_PORT_STAT_ENABLE;
++ }
++#if 0
++ if (dum->driver) {
++
++ dum->port_status[rhport] |=
++ USB_PORT_STAT_ENABLE;
++ /* give it the best speed we agree on */
++ dum->gadget.speed = dum->driver->speed;
++ dum->gadget.ep0->maxpacket = 64;
++ switch (dum->gadget.speed) {
++ case USB_SPEED_HIGH:
++ dum->port_status[rhport] |=
++ USB_PORT_STAT_HIGH_SPEED;
++ break;
++ case USB_SPEED_LOW:
++ dum->gadget.ep0->maxpacket = 8;
++ dum->port_status[rhport] |=
++ USB_PORT_STAT_LOW_SPEED;
++ break;
++ default:
++ dum->gadget.speed = USB_SPEED_FULL;
++ break;
++ }
++ }
++#endif
++
++ }
++ ((u16 *) buf)[0] = cpu_to_le16(dum->port_status[rhport]);
++ ((u16 *) buf)[1] =
++ cpu_to_le16(dum->port_status[rhport] >> 16);
++
++ dbg_vhci_rh(" GetPortStatus bye %x %x\n", ((u16 *)buf)[0],
++ ((u16 *)buf)[1]);
++ break;
++ case SetHubFeature:
++ dbg_vhci_rh(" SetHubFeature\n");
++ retval = -EPIPE;
++ break;
++ case SetPortFeature:
++ switch (wValue) {
++ case USB_PORT_FEAT_SUSPEND:
++ dbg_vhci_rh(" SetPortFeature: "
++ "USB_PORT_FEAT_SUSPEND\n");
++ printk(KERN_ERR "%s: not yet\n", __func__);
++#if 0
++ dum->port_status[rhport] |=
++ (1 << USB_PORT_FEAT_SUSPEND);
++ if (dum->driver->suspend) {
++ spin_unlock(&dum->lock);
++ dum->driver->suspend(&dum->gadget);
++ spin_lock(&dum->lock);
++ }
++#endif
++ break;
++ case USB_PORT_FEAT_RESET:
++ dbg_vhci_rh(" SetPortFeature: USB_PORT_FEAT_RESET\n");
++ /* if it's already running, disconnect first */
++ if (dum->port_status[rhport] & USB_PORT_STAT_ENABLE) {
++ dum->port_status[rhport] &=
++ ~(USB_PORT_STAT_ENABLE |
++ USB_PORT_STAT_LOW_SPEED |
++ USB_PORT_STAT_HIGH_SPEED);
++#if 0
++ if (dum->driver) {
++ dev_dbg(hardware, "disconnect\n");
++ stop_activity(dum, dum->driver);
++ }
++#endif
++
++ /* FIXME test that code path! */
++ }
++ /* 50msec reset signaling */
++ dum->re_timeout = jiffies + msecs_to_jiffies(50);
++
++ /* FALLTHROUGH */
++ default:
++ dbg_vhci_rh(" SetPortFeature: default %d\n", wValue);
++ dum->port_status[rhport] |= (1 << wValue);
++ }
++ break;
++
++ default:
++ printk(KERN_ERR "%s: default: no such request\n", __func__);
++ /* dev_dbg (hardware,
++ * "hub control req%04x v%04x i%04x l%d\n",
++ * typeReq, wValue, wIndex, wLength); */
++
++ /* "protocol stall" on error */
++ retval = -EPIPE;
++ }
++
++ if (dbg_flag_vhci_rh) {
++ printk(KERN_DEBUG "port %d\n", rhport);
++ dump_port_status(prev_port_status[rhport]);
++ dump_port_status(dum->port_status[rhport]);
++ }
++ dbg_vhci_rh(" bye\n");
++
++ spin_unlock_irqrestore(&dum->lock, flags);
++
++ return retval;
++}
++
++
++
++/*----------------------------------------------------------------------*/
++
++static struct vhci_device *get_vdev(struct usb_device *udev)
++{
++ int i;
++
++ if (!udev)
++ return NULL;
++
++ for (i = 0; i < VHCI_NPORTS; i++)
++ if (the_controller->vdev[i].udev == udev)
++ return port_to_vdev(i);
++
++ return NULL;
++}
++
++static void vhci_tx_urb(struct urb *urb)
++{
++ struct vhci_device *vdev = get_vdev(urb->dev);
++ struct vhci_priv *priv;
++ unsigned long flag;
++
++ if (!vdev) {
++ err("could not get virtual device");
++ /* BUG(); */
++ return;
++ }
++
++ spin_lock_irqsave(&vdev->priv_lock, flag);
++
++ priv = kzalloc(sizeof(struct vhci_priv), GFP_ATOMIC);
++ if (!priv) {
++ dev_err(&urb->dev->dev, "malloc vhci_priv\n");
++ spin_unlock_irqrestore(&vdev->priv_lock, flag);
++ usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC);
++ return;
++ }
++
++ priv->seqnum = atomic_inc_return(&the_controller->seqnum);
++ if (priv->seqnum == 0xffff)
++ uinfo("seqnum max\n");
++
++ priv->vdev = vdev;
++ priv->urb = urb;
++
++ urb->hcpriv = (void *) priv;
++
++
++ list_add_tail(&priv->list, &vdev->priv_tx);
++
++ wake_up(&vdev->waitq_tx);
++ spin_unlock_irqrestore(&vdev->priv_lock, flag);
++}
++
++static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
++ gfp_t mem_flags)
++{
++ struct device *dev = &urb->dev->dev;
++ int ret = 0;
++ unsigned long flags;
++
++ dbg_vhci_hc("enter, usb_hcd %p urb %p mem_flags %d\n",
++ hcd, urb, mem_flags);
++
++ /* patch to usb_sg_init() is in 2.5.60 */
++ BUG_ON(!urb->transfer_buffer && urb->transfer_buffer_length);
++
++ spin_lock_irqsave(&the_controller->lock, flags);
++
++ /* check HC is active or not */
++ if (!HC_IS_RUNNING(hcd->state)) {
++ dev_err(dev, "HC is not running\n");
++ spin_unlock_irqrestore(&the_controller->lock, flags);
++ return -ENODEV;
++ }
++
++ if (urb->status != -EINPROGRESS) {
++ dev_err(dev, "URB already unlinked!, status %d\n", urb->status);
++ spin_unlock_irqrestore(&the_controller->lock, flags);
++ return urb->status;
++ }
++
++ ret = usb_hcd_link_urb_to_ep(hcd, urb);
++ if (ret)
++ goto no_need_unlink;
++
++ /*
++ * The enumelation process is as follows;
++ *
++ * 1. Get_Descriptor request to DevAddrs(0) EndPoint(0)
++ * to get max packet length of default pipe
++ *
++ * 2. Set_Address request to DevAddr(0) EndPoint(0)
++ *
++ */
++
++ if (usb_pipedevice(urb->pipe) == 0) {
++ __u8 type = usb_pipetype(urb->pipe);
++ struct usb_ctrlrequest *ctrlreq =
++ (struct usb_ctrlrequest *) urb->setup_packet;
++ struct vhci_device *vdev =
++ port_to_vdev(the_controller->pending_port);
++
++ if (type != PIPE_CONTROL || !ctrlreq) {
++ dev_err(dev, "invalid request to devnum 0\n");
++ ret = EINVAL;
++ goto no_need_xmit;
++ }
++
++ switch (ctrlreq->bRequest) {
++ case USB_REQ_SET_ADDRESS:
++ /* set_address may come when a device is reset */
++ dev_info(dev, "SetAddress Request (%d) to port %d\n",
++ ctrlreq->wValue, vdev->rhport);
++
++ vdev->udev = urb->dev;
++
++ spin_lock(&vdev->ud.lock);
++ vdev->ud.status = VDEV_ST_USED;
++ spin_unlock(&vdev->ud.lock);
++
++ if (urb->status == -EINPROGRESS) {
++ /* This request is successfully completed. */
++ /* If not -EINPROGRESS, possibly unlinked. */
++ urb->status = 0;
++ }
++
++ goto no_need_xmit;
++
++ case USB_REQ_GET_DESCRIPTOR:
++ if (ctrlreq->wValue == (USB_DT_DEVICE << 8))
++ dbg_vhci_hc("Not yet?: "
++ "Get_Descriptor to device 0 "
++ "(get max pipe size)\n");
++
++ /* FIXME: reference count? (usb_get_dev()) */
++ vdev->udev = urb->dev;
++ goto out;
++
++ default:
++ /* NOT REACHED */
++ dev_err(dev, "invalid request to devnum 0 bRequest %u, "
++ "wValue %u\n", ctrlreq->bRequest,
++ ctrlreq->wValue);
++ ret = -EINVAL;
++ goto no_need_xmit;
++ }
++
++ }
++
++out:
++ vhci_tx_urb(urb);
++
++ spin_unlock_irqrestore(&the_controller->lock, flags);
++
++ return 0;
++
++no_need_xmit:
++ usb_hcd_unlink_urb_from_ep(hcd, urb);
++no_need_unlink:
++ spin_unlock_irqrestore(&the_controller->lock, flags);
++
++ usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, urb->status);
++
++ return 0;
++}
++
++/*
++ * vhci_rx gives back the urb after receiving the reply of the urb. If an
++ * unlink pdu is sent or not, vhci_rx receives a normal return pdu and gives
++ * back its urb. For the driver unlinking the urb, the content of the urb is
++ * not important, but the calling to its completion handler is important; the
++ * completion of unlinking is notified by the completion handler.
++ *
++ *
++ * CLIENT SIDE
++ *
++ * - When vhci_hcd receives RET_SUBMIT,
++ *
++ * - case 1a). the urb of the pdu is not unlinking.
++ * - normal case
++ * => just give back the urb
++ *
++ * - case 1b). the urb of the pdu is unlinking.
++ * - usbip.ko will return a reply of the unlinking request.
++ * => give back the urb now and go to case 2b).
++ *
++ * - When vhci_hcd receives RET_UNLINK,
++ *
++ * - case 2a). a submit request is still pending in vhci_hcd.
++ * - urb was really pending in usbip.ko and urb_unlink_urb() was
++ * completed there.
++ * => free a pending submit request
++ * => notify unlink completeness by giving back the urb
++ *
++ * - case 2b). a submit request is *not* pending in vhci_hcd.
++ * - urb was already given back to the core driver.
++ * => do not give back the urb
++ *
++ *
++ * SERVER SIDE
++ *
++ * - When usbip receives CMD_UNLINK,
++ *
++ * - case 3a). the urb of the unlink request is now in submission.
++ * => do usb_unlink_urb().
++ * => after the unlink is completed, send RET_UNLINK.
++ *
++ * - case 3b). the urb of the unlink request is not in submission.
++ * - may be already completed or never be received
++ * => send RET_UNLINK
++ *
++ */
++static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
++{
++ unsigned long flags;
++ struct vhci_priv *priv;
++ struct vhci_device *vdev;
++
++ uinfo("vhci_hcd: dequeue a urb %p\n", urb);
++
++
++ spin_lock_irqsave(&the_controller->lock, flags);
++
++ priv = urb->hcpriv;
++ if (!priv) {
++ /* URB was never linked! or will be soon given back by
++ * vhci_rx. */
++ spin_unlock_irqrestore(&the_controller->lock, flags);
++ return 0;
++ }
++
++ {
++ int ret = 0;
++ ret = usb_hcd_check_unlink_urb(hcd, urb, status);
++ if (ret) {
++ spin_unlock_irqrestore(&the_controller->lock, flags);
++ return 0;
++ }
++ }
++
++ /* send unlink request here? */
++ vdev = priv->vdev;
++
++ if (!vdev->ud.tcp_socket) {
++ /* tcp connection is closed */
++ unsigned long flags2;
++
++ spin_lock_irqsave(&vdev->priv_lock, flags2);
++
++ uinfo("vhci_hcd: device %p seems to be disconnected\n", vdev);
++ list_del(&priv->list);
++ kfree(priv);
++ urb->hcpriv = NULL;
++
++ spin_unlock_irqrestore(&vdev->priv_lock, flags2);
++
++ } else {
++ /* tcp connection is alive */
++ unsigned long flags2;
++ struct vhci_unlink *unlink;
++
++ spin_lock_irqsave(&vdev->priv_lock, flags2);
++
++ /* setup CMD_UNLINK pdu */
++ unlink = kzalloc(sizeof(struct vhci_unlink), GFP_ATOMIC);
++ if (!unlink) {
++ uerr("malloc vhci_unlink\n");
++ spin_unlock_irqrestore(&vdev->priv_lock, flags2);
++ spin_unlock_irqrestore(&the_controller->lock, flags);
++ usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC);
++ return -ENOMEM;
++ }
++
++ unlink->seqnum = atomic_inc_return(&the_controller->seqnum);
++ if (unlink->seqnum == 0xffff)
++ uinfo("seqnum max\n");
++
++ unlink->unlink_seqnum = priv->seqnum;
++
++ uinfo("vhci_hcd: device %p seems to be still connected\n",
++ vdev);
++
++ /* send cmd_unlink and try to cancel the pending URB in the
++ * peer */
++ list_add_tail(&unlink->list, &vdev->unlink_tx);
++ wake_up(&vdev->waitq_tx);
++
++ spin_unlock_irqrestore(&vdev->priv_lock, flags2);
++ }
++
++
++ /*
++ * If tcp connection is alive, we have sent CMD_UNLINK.
++ * vhci_rx will receive RET_UNLINK and give back the URB.
++ * Otherwise, we give back it here.
++ */
++ if (!vdev->ud.tcp_socket) {
++ /* tcp connection is closed */
++ uinfo("vhci_hcd: vhci_urb_dequeue() gives back urb %p\n", urb);
++
++ usb_hcd_unlink_urb_from_ep(hcd, urb);
++
++ spin_unlock_irqrestore(&the_controller->lock, flags);
++ usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb,
++ urb->status);
++ spin_lock_irqsave(&the_controller->lock, flags);
++ }
++
++ spin_unlock_irqrestore(&the_controller->lock, flags);
++
++ dbg_vhci_hc("leave\n");
++ return 0;
++}
++
++
++static void vhci_device_unlink_cleanup(struct vhci_device *vdev)
++{
++ struct vhci_unlink *unlink, *tmp;
++
++ spin_lock(&vdev->priv_lock);
++
++ list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) {
++ list_del(&unlink->list);
++ kfree(unlink);
++ }
++
++ list_for_each_entry_safe(unlink, tmp, &vdev->unlink_rx, list) {
++ list_del(&unlink->list);
++ kfree(unlink);
++ }
++
++ spin_unlock(&vdev->priv_lock);
++}
++
++/*
++ * The important thing is that only one context begins cleanup.
++ * This is why error handling and cleanup become simple.
++ * We do not want to consider race condition as possible.
++ */
++static void vhci_shutdown_connection(struct usbip_device *ud)
++{
++ struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
++
++ /* need this? see stub_dev.c */
++ if (ud->tcp_socket) {
++ udbg("shutdown tcp_socket %p\n", ud->tcp_socket);
++ kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR);
++ }
++
++ usbip_stop_threads(&vdev->ud);
++ uinfo("stop threads\n");
++
++ /* active connection is closed */
++ if (vdev->ud.tcp_socket != NULL) {
++ sock_release(vdev->ud.tcp_socket);
++ vdev->ud.tcp_socket = NULL;
++ }
++ uinfo("release socket\n");
++
++ vhci_device_unlink_cleanup(vdev);
++
++ /*
++ * rh_port_disconnect() is a trigger of ...
++ * usb_disable_device():
++ * disable all the endpoints for a USB device.
++ * usb_disable_endpoint():
++ * disable endpoints. pending urbs are unlinked(dequeued).
++ *
++ * NOTE: After calling rh_port_disconnect(), the USB device drivers of a
++ * deteched device should release used urbs in a cleanup function(i.e.
++ * xxx_disconnect()). Therefore, vhci_hcd does not need to release
++ * pushed urbs and their private data in this function.
++ *
++ * NOTE: vhci_dequeue() must be considered carefully. When shutdowning
++ * a connection, vhci_shutdown_connection() expects vhci_dequeue()
++ * gives back pushed urbs and frees their private data by request of
++ * the cleanup function of a USB driver. When unlinking a urb with an
++ * active connection, vhci_dequeue() does not give back the urb which
++ * is actually given back by vhci_rx after receiving its return pdu.
++ *
++ */
++ rh_port_disconnect(vdev->rhport);
++
++ uinfo("disconnect device\n");
++}
++
++
++static void vhci_device_reset(struct usbip_device *ud)
++{
++ struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
++
++ spin_lock(&ud->lock);
++
++ vdev->speed = 0;
++ vdev->devid = 0;
++
++ ud->tcp_socket = NULL;
++
++ ud->status = VDEV_ST_NULL;
++
++ spin_unlock(&ud->lock);
++}
++
++static void vhci_device_unusable(struct usbip_device *ud)
++{
++ spin_lock(&ud->lock);
++
++ ud->status = VDEV_ST_ERROR;
++
++ spin_unlock(&ud->lock);
++}
++
++static void vhci_device_init(struct vhci_device *vdev)
++{
++ memset(vdev, 0, sizeof(*vdev));
++
++ usbip_task_init(&vdev->ud.tcp_rx, "vhci_rx", vhci_rx_loop);
++ usbip_task_init(&vdev->ud.tcp_tx, "vhci_tx", vhci_tx_loop);
++
++ vdev->ud.side = USBIP_VHCI;
++ vdev->ud.status = VDEV_ST_NULL;
++ /* vdev->ud.lock = SPIN_LOCK_UNLOCKED; */
++ spin_lock_init(&vdev->ud.lock);
++
++ INIT_LIST_HEAD(&vdev->priv_rx);
++ INIT_LIST_HEAD(&vdev->priv_tx);
++ INIT_LIST_HEAD(&vdev->unlink_tx);
++ INIT_LIST_HEAD(&vdev->unlink_rx);
++ /* vdev->priv_lock = SPIN_LOCK_UNLOCKED; */
++ spin_lock_init(&vdev->priv_lock);
++
++ init_waitqueue_head(&vdev->waitq_tx);
++
++ vdev->ud.eh_ops.shutdown = vhci_shutdown_connection;
++ vdev->ud.eh_ops.reset = vhci_device_reset;
++ vdev->ud.eh_ops.unusable = vhci_device_unusable;
++
++ usbip_start_eh(&vdev->ud);
++}
++
++
++/*----------------------------------------------------------------------*/
++
++static int vhci_start(struct usb_hcd *hcd)
++{
++ struct vhci_hcd *vhci = hcd_to_vhci(hcd);
++ int rhport;
++ int err = 0;
++
++ dbg_vhci_hc("enter vhci_start\n");
++
++
++ /* initialize private data of usb_hcd */
++
++ for (rhport = 0; rhport < VHCI_NPORTS; rhport++) {
++ struct vhci_device *vdev = &vhci->vdev[rhport];
++ vhci_device_init(vdev);
++ vdev->rhport = rhport;
++ }
++
++ atomic_set(&vhci->seqnum, 0);
++ spin_lock_init(&vhci->lock);
++
++
++
++ hcd->power_budget = 0; /* no limit */
++ hcd->state = HC_STATE_RUNNING;
++ hcd->uses_new_polling = 1;
++
++
++ /* vhci_hcd is now ready to be controlled through sysfs */
++ err = sysfs_create_group(&vhci_dev(vhci)->kobj, &dev_attr_group);
++ if (err) {
++ uerr("create sysfs files\n");
++ return err;
++ }
++
++ return 0;
++}
++
++static void vhci_stop(struct usb_hcd *hcd)
++{
++ struct vhci_hcd *vhci = hcd_to_vhci(hcd);
++ int rhport = 0;
++
++ dbg_vhci_hc("stop VHCI controller\n");
++
++
++ /* 1. remove the userland interface of vhci_hcd */
++ sysfs_remove_group(&vhci_dev(vhci)->kobj, &dev_attr_group);
++
++ /* 2. shutdown all the ports of vhci_hcd */
++ for (rhport = 0 ; rhport < VHCI_NPORTS; rhport++) {
++ struct vhci_device *vdev = &vhci->vdev[rhport];
++
++ usbip_event_add(&vdev->ud, VDEV_EVENT_REMOVED);
++ usbip_stop_eh(&vdev->ud);
++ }
++
++
++ uinfo("vhci_stop done\n");
++}
++
++/*----------------------------------------------------------------------*/
++
++static int vhci_get_frame_number(struct usb_hcd *hcd)
++{
++ uerr("Not yet implemented\n");
++ return 0;
++}
++
++
++#ifdef CONFIG_PM
++
++/* FIXME: suspend/resume */
++static int vhci_bus_suspend(struct usb_hcd *hcd)
++{
++ struct vhci_hcd *vhci = hcd_to_vhci(hcd);
++
++ dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
++
++ spin_lock_irq(&vhci->lock);
++ /* vhci->rh_state = DUMMY_RH_SUSPENDED;
++ * set_link_state(vhci); */
++ hcd->state = HC_STATE_SUSPENDED;
++ spin_unlock_irq(&vhci->lock);
++
++ return 0;
++}
++
++static int vhci_bus_resume(struct usb_hcd *hcd)
++{
++ struct vhci_hcd *vhci = hcd_to_vhci(hcd);
++ int rc = 0;
++
++ dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
++
++ spin_lock_irq(&vhci->lock);
++ if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
++ rc = -ESHUTDOWN;
++ } else {
++ /* vhci->rh_state = DUMMY_RH_RUNNING;
++ * set_link_state(vhci);
++ * if (!list_empty(&vhci->urbp_list))
++ * mod_timer(&vhci->timer, jiffies); */
++ hcd->state = HC_STATE_RUNNING;
++ }
++ spin_unlock_irq(&vhci->lock);
++ return rc;
++
++ return 0;
++}
++
++#else
++
++#define vhci_bus_suspend NULL
++#define vhci_bus_resume NULL
++#endif
++
++
++
++static struct hc_driver vhci_hc_driver = {
++ .description = driver_name,
++ .product_desc = driver_desc,
++ .hcd_priv_size = sizeof(struct vhci_hcd),
++
++ .flags = HCD_USB2,
++
++ .start = vhci_start,
++ .stop = vhci_stop,
++
++ .urb_enqueue = vhci_urb_enqueue,
++ .urb_dequeue = vhci_urb_dequeue,
++
++ .get_frame_number = vhci_get_frame_number,
++
++ .hub_status_data = vhci_hub_status,
++ .hub_control = vhci_hub_control,
++ .bus_suspend = vhci_bus_suspend,
++ .bus_resume = vhci_bus_resume,
++};
++
++static int vhci_hcd_probe(struct platform_device *pdev)
++{
++ struct usb_hcd *hcd;
++ int ret;
++
++ uinfo("proving...\n");
++
++ dbg_vhci_hc("name %s id %d\n", pdev->name, pdev->id);
++
++ /* will be removed */
++ if (pdev->dev.dma_mask) {
++ dev_info(&pdev->dev, "vhci_hcd DMA not supported\n");
++ return -EINVAL;
++ }
++
++ /*
++ * Allocate and initialize hcd.
++ * Our private data is also allocated automatically.
++ */
++ hcd = usb_create_hcd(&vhci_hc_driver, &pdev->dev, pdev->dev.bus_id);
++ if (!hcd) {
++ uerr("create hcd failed\n");
++ return -ENOMEM;
++ }
++
++
++ /* this is private data for vhci_hcd */
++ the_controller = hcd_to_vhci(hcd);
++
++ /*
++ * Finish generic HCD structure initialization and register.
++ * Call the driver's reset() and start() routines.
++ */
++ ret = usb_add_hcd(hcd, 0, 0);
++ if (ret != 0) {
++ uerr("usb_add_hcd failed %d\n", ret);
++ usb_put_hcd(hcd);
++ the_controller = NULL;
++ return ret;
++ }
++
++
++ dbg_vhci_hc("bye\n");
++ return 0;
++}
++
++
++static int vhci_hcd_remove(struct platform_device *pdev)
++{
++ struct usb_hcd *hcd;
++
++ hcd = platform_get_drvdata(pdev);
++ if (!hcd)
++ return 0;
++
++ /*
++ * Disconnects the root hub,
++ * then reverses the effects of usb_add_hcd(),
++ * invoking the HCD's stop() methods.
++ */
++ usb_remove_hcd(hcd);
++ usb_put_hcd(hcd);
++ the_controller = NULL;
++
++
++ return 0;
++}
++
++
++
++#ifdef CONFIG_PM
++
++/* what should happen for USB/IP under suspend/resume? */
++static int vhci_hcd_suspend(struct platform_device *pdev, pm_message_t state)
++{
++ struct usb_hcd *hcd;
++ int rhport = 0;
++ int connected = 0;
++ int ret = 0;
++
++ dev_dbg(&pdev->dev, "%s\n", __func__);
++
++ hcd = platform_get_drvdata(pdev);
++
++ spin_lock(&the_controller->lock);
++
++ for (rhport = 0; rhport < VHCI_NPORTS; rhport++)
++ if (the_controller->port_status[rhport] &
++ USB_PORT_STAT_CONNECTION)
++ connected += 1;
++
++ spin_unlock(&the_controller->lock);
++
++ if (connected > 0) {
++ uinfo("We have %d active connection%s. Do not suspend.\n",
++ connected, (connected == 1 ? "" : "s"));
++ ret = -EBUSY;
++ } else {
++ uinfo("suspend vhci_hcd");
++ clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
++ }
++
++ return ret;
++}
++
++static int vhci_hcd_resume(struct platform_device *pdev)
++{
++ struct usb_hcd *hcd;
++
++ dev_dbg(&pdev->dev, "%s\n", __func__);
++
++ hcd = platform_get_drvdata(pdev);
++ set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
++ usb_hcd_poll_rh_status(hcd);
++
++ return 0;
++}
++
++#else
++
++#define vhci_hcd_suspend NULL
++#define vhci_hcd_resume NULL
++
++#endif
++
++
++static struct platform_driver vhci_driver = {
++ .probe = vhci_hcd_probe,
++ .remove = __devexit_p(vhci_hcd_remove),
++ .suspend = vhci_hcd_suspend,
++ .resume = vhci_hcd_resume,
++ .driver = {
++ .name = (char *) driver_name,
++ .owner = THIS_MODULE,
++ },
++};
++
++/*----------------------------------------------------------------------*/
++
++/*
++ * The VHCI 'device' is 'virtual'; not a real plug&play hardware.
++ * We need to add this virtual device as a platform device arbitrarily:
++ * 1. platform_device_register()
++ */
++static void the_pdev_release(struct device *dev)
++{
++ return;
++}
++
++static struct platform_device the_pdev = {
++ /* should be the same name as driver_name */
++ .name = (char *) driver_name,
++ .id = -1,
++ .dev = {
++ /* .driver = &vhci_driver, */
++ .release = the_pdev_release,
++ },
++};
++
++static int __init vhci_init(void)
++{
++ int ret;
++
++ dbg_vhci_hc("enter\n");
++ if (usb_disabled())
++ return -ENODEV;
++
++ printk(KERN_INFO KBUILD_MODNAME ": %s, %s\n", driver_name,
++ DRIVER_VERSION);
++
++ ret = platform_driver_register(&vhci_driver);
++ if (ret < 0)
++ goto err_driver_register;
++
++ ret = platform_device_register(&the_pdev);
++ if (ret < 0)
++ goto err_platform_device_register;
++
++ dbg_vhci_hc("bye\n");
++ return ret;
++
++ /* error occurred */
++err_platform_device_register:
++ platform_driver_unregister(&vhci_driver);
++
++err_driver_register:
++ dbg_vhci_hc("bye\n");
++ return ret;
++}
++module_init(vhci_init);
++
++static void __exit vhci_cleanup(void)
++{
++ dbg_vhci_hc("enter\n");
++
++ platform_device_unregister(&the_pdev);
++ platform_driver_unregister(&vhci_driver);
++
++ dbg_vhci_hc("bye\n");
++}
++module_exit(vhci_cleanup);
+diff --git a/drivers/staging/usbip/vhci_rx.c b/drivers/staging/usbip/vhci_rx.c
+new file mode 100644
+index 0000000..933ccaf
+--- /dev/null
++++ b/drivers/staging/usbip/vhci_rx.c
+@@ -0,0 +1,251 @@
++/*
++ * Copyright (C) 2003-2008 Takahiro Hirofuchi
++ *
++ * This is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
++ * USA.
++ */
++
++#include "usbip_common.h"
++#include "vhci.h"
++
++
++/* get URB from transmitted urb queue */
++static struct urb *pickup_urb_and_free_priv(struct vhci_device *vdev,
++ __u32 seqnum)
++{
++ struct vhci_priv *priv, *tmp;
++ struct urb *urb = NULL;
++ int status;
++
++ spin_lock(&vdev->priv_lock);
++
++ list_for_each_entry_safe(priv, tmp, &vdev->priv_rx, list) {
++ if (priv->seqnum == seqnum) {
++ urb = priv->urb;
++ status = urb->status;
++
++ dbg_vhci_rx("find urb %p vurb %p seqnum %u\n",
++ urb, priv, seqnum);
++
++ /* TODO: fix logic here to improve indent situtation */
++ if (status != -EINPROGRESS) {
++ if (status == -ENOENT ||
++ status == -ECONNRESET)
++ dev_info(&urb->dev->dev,
++ "urb %p was unlinked "
++ "%ssynchronuously.\n", urb,
++ status == -ENOENT ? "" : "a");
++ else
++ dev_info(&urb->dev->dev,
++ "urb %p may be in a error, "
++ "status %d\n", urb, status);
++ }
++
++ list_del(&priv->list);
++ kfree(priv);
++ urb->hcpriv = NULL;
++
++ break;
++ }
++ }
++
++ spin_unlock(&vdev->priv_lock);
++
++ return urb;
++}
++
++static void vhci_recv_ret_submit(struct vhci_device *vdev,
++ struct usbip_header *pdu)
++{
++ struct usbip_device *ud = &vdev->ud;
++ struct urb *urb;
++
++
++ urb = pickup_urb_and_free_priv(vdev, pdu->base.seqnum);
++
++
++ if (!urb) {
++ uerr("cannot find a urb of seqnum %u\n", pdu->base.seqnum);
++ uinfo("max seqnum %d\n", atomic_read(&the_controller->seqnum));
++ usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
++ return;
++ }
++
++
++ /* unpack the pdu to a urb */
++ usbip_pack_pdu(pdu, urb, USBIP_RET_SUBMIT, 0);
++
++
++ /* recv transfer buffer */
++ if (usbip_recv_xbuff(ud, urb) < 0)
++ return;
++
++
++ /* recv iso_packet_descriptor */
++ if (usbip_recv_iso(ud, urb) < 0)
++ return;
++
++
++ if (dbg_flag_vhci_rx)
++ usbip_dump_urb(urb);
++
++
++ dbg_vhci_rx("now giveback urb %p\n", urb);
++
++ spin_lock(&the_controller->lock);
++ usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb);
++ spin_unlock(&the_controller->lock);
++
++ usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, urb->status);
++
++
++ dbg_vhci_rx("Leave\n");
++
++ return;
++}
++
++
++static struct vhci_unlink *dequeue_pending_unlink(struct vhci_device *vdev,
++ struct usbip_header *pdu)
++{
++ struct vhci_unlink *unlink, *tmp;
++
++ spin_lock(&vdev->priv_lock);
++
++ list_for_each_entry_safe(unlink, tmp, &vdev->unlink_rx, list) {
++ uinfo("unlink->seqnum %lu\n", unlink->seqnum);
++ if (unlink->seqnum == pdu->base.seqnum) {
++ dbg_vhci_rx("found pending unlink, %lu\n",
++ unlink->seqnum);
++ list_del(&unlink->list);
++
++ spin_unlock(&vdev->priv_lock);
++ return unlink;
++ }
++ }
++
++ spin_unlock(&vdev->priv_lock);
++
++ return NULL;
++}
++
++
++static void vhci_recv_ret_unlink(struct vhci_device *vdev,
++ struct usbip_header *pdu)
++{
++ struct vhci_unlink *unlink;
++ struct urb *urb;
++
++ usbip_dump_header(pdu);
++
++ unlink = dequeue_pending_unlink(vdev, pdu);
++ if (!unlink) {
++ uinfo("cannot find the pending unlink %u\n", pdu->base.seqnum);
++ return;
++ }
++
++ urb = pickup_urb_and_free_priv(vdev, unlink->unlink_seqnum);
++ if (!urb) {
++ /*
++ * I get the result of a unlink request. But, it seems that I
++ * already received the result of its submit result and gave
++ * back the URB.
++ */
++ uinfo("the urb (seqnum %d) was already given backed\n",
++ pdu->base.seqnum);
++ } else {
++ dbg_vhci_rx("now giveback urb %p\n", urb);
++
++ /* If unlink is succeed, status is -ECONNRESET */
++ urb->status = pdu->u.ret_unlink.status;
++ uinfo("%d\n", urb->status);
++
++ spin_lock(&the_controller->lock);
++ usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb);
++ spin_unlock(&the_controller->lock);
++
++ usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb,
++ urb->status);
++ }
++
++ kfree(unlink);
++
++ return;
++}
++
++/* recv a pdu */
++static void vhci_rx_pdu(struct usbip_device *ud)
++{
++ int ret;
++ struct usbip_header pdu;
++ struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
++
++
++ dbg_vhci_rx("Enter\n");
++
++ memset(&pdu, 0, sizeof(pdu));
++
++
++ /* 1. receive a pdu header */
++ ret = usbip_xmit(0, ud->tcp_socket, (char *) &pdu, sizeof(pdu), 0);
++ if (ret != sizeof(pdu)) {
++ uerr("receiving pdu failed! size is %d, should be %d\n",
++ ret, sizeof(pdu));
++ usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
++ return;
++ }
++
++ usbip_header_correct_endian(&pdu, 0);
++
++ if (dbg_flag_vhci_rx)
++ usbip_dump_header(&pdu);
++
++ switch (pdu.base.command) {
++ case USBIP_RET_SUBMIT:
++ vhci_recv_ret_submit(vdev, &pdu);
++ break;
++ case USBIP_RET_UNLINK:
++ vhci_recv_ret_unlink(vdev, &pdu);
++ break;
++ default:
++ /* NOTREACHED */
++ uerr("unknown pdu %u\n", pdu.base.command);
++ usbip_dump_header(&pdu);
++ usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
++ }
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++void vhci_rx_loop(struct usbip_task *ut)
++{
++ struct usbip_device *ud = container_of(ut, struct usbip_device, tcp_rx);
++
++
++ while (1) {
++ if (signal_pending(current)) {
++ dbg_vhci_rx("signal catched!\n");
++ break;
++ }
++
++
++ if (usbip_event_happend(ud))
++ break;
++
++ vhci_rx_pdu(ud);
++ }
++}
++
+diff --git a/drivers/staging/usbip/vhci_sysfs.c b/drivers/staging/usbip/vhci_sysfs.c
+new file mode 100644
+index 0000000..24c2851
+--- /dev/null
++++ b/drivers/staging/usbip/vhci_sysfs.c
+@@ -0,0 +1,250 @@
++/*
++ * Copyright (C) 2003-2008 Takahiro Hirofuchi
++ *
++ * This is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
++ * USA.
++ */
++
++#include "usbip_common.h"
++#include "vhci.h"
++
++#include <linux/in.h>
++
++/* TODO: refine locking ?*/
++
++/* Sysfs entry to show port status */
++static ssize_t show_status(struct device *dev, struct device_attribute *attr,
++ char *out)
++{
++ char *s = out;
++ int i = 0;
++
++ if (!the_controller || !out)
++ BUG();
++
++ spin_lock(&the_controller->lock);
++
++ /*
++ * output example:
++ * prt sta spd dev socket local_busid
++ * 000 004 000 000 c5a7bb80 1-2.3
++ * 001 004 000 000 d8cee980 2-3.4
++ *
++ * IP address can be retrieved from a socket pointer address by looking
++ * up /proc/net/{tcp,tcp6}. Also, a userland program may remember a
++ * port number and its peer IP address.
++ */
++ out += sprintf(out, "prt sta spd bus dev socket "
++ "local_busid\n");
++
++ for (i = 0; i < VHCI_NPORTS; i++) {
++ struct vhci_device *vdev = port_to_vdev(i);
++
++ spin_lock(&vdev->ud.lock);
++
++ out += sprintf(out, "%03u %03u ", i, vdev->ud.status);
++
++ if (vdev->ud.status == VDEV_ST_USED) {
++ out += sprintf(out, "%03u %08x ",
++ vdev->speed, vdev->devid);
++ out += sprintf(out, "%16p ", vdev->ud.tcp_socket);
++ out += sprintf(out, "%s", vdev->udev->dev.bus_id);
++
++ } else
++ out += sprintf(out, "000 000 000 0000000000000000 0-0");
++
++ out += sprintf(out, "\n");
++
++ spin_unlock(&vdev->ud.lock);
++ }
++
++ spin_unlock(&the_controller->lock);
++
++ return out - s;
++}
++static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
++
++/* Sysfs entry to shutdown a virtual connection */
++static int vhci_port_disconnect(__u32 rhport)
++{
++ struct vhci_device *vdev;
++
++ dbg_vhci_sysfs("enter\n");
++
++ /* lock */
++ spin_lock(&the_controller->lock);
++
++ vdev = port_to_vdev(rhport);
++
++ spin_lock(&vdev->ud.lock);
++ if (vdev->ud.status == VDEV_ST_NULL) {
++ uerr("not connected %d\n", vdev->ud.status);
++
++ /* unlock */
++ spin_unlock(&vdev->ud.lock);
++ spin_unlock(&the_controller->lock);
++
++ return -EINVAL;
++ }
++
++ /* unlock */
++ spin_unlock(&vdev->ud.lock);
++ spin_unlock(&the_controller->lock);
++
++ usbip_event_add(&vdev->ud, VDEV_EVENT_DOWN);
++
++ return 0;
++}
++
++static ssize_t store_detach(struct device *dev, struct device_attribute *attr,
++ const char *buf, size_t count)
++{
++ int err;
++ __u32 rhport = 0;
++
++ sscanf(buf, "%u", &rhport);
++
++ /* check rhport */
++ if (rhport >= VHCI_NPORTS) {
++ uerr("invalid port %u\n", rhport);
++ return -EINVAL;
++ }
++
++ err = vhci_port_disconnect(rhport);
++ if (err < 0)
++ return -EINVAL;
++
++ dbg_vhci_sysfs("Leave\n");
++ return count;
++}
++static DEVICE_ATTR(detach, S_IWUSR, NULL, store_detach);
++
++/* Sysfs entry to establish a virtual connection */
++static int valid_args(__u32 rhport, enum usb_device_speed speed)
++{
++ /* check rhport */
++ if ((rhport < 0) || (rhport >= VHCI_NPORTS)) {
++ uerr("port %u\n", rhport);
++ return -EINVAL;
++ }
++
++ /* check speed */
++ switch (speed) {
++ case USB_SPEED_LOW:
++ case USB_SPEED_FULL:
++ case USB_SPEED_HIGH:
++ case USB_SPEED_VARIABLE:
++ break;
++ default:
++ uerr("speed %d\n", speed);
++ return -EINVAL;
++ }
++
++ return 0;
++}
++
++/*
++ * To start a new USB/IP attachment, a userland program needs to setup a TCP
++ * connection and then write its socket descriptor with remote device
++ * information into this sysfs file.
++ *
++ * A remote device is virtually attached to the root-hub port of @rhport with
++ * @speed. @devid is embedded into a request to specify the remote device in a
++ * server host.
++ *
++ * write() returns 0 on success, else negative errno.
++ */
++static ssize_t store_attach(struct device *dev, struct device_attribute *attr,
++ const char *buf, size_t count)
++{
++ struct vhci_device *vdev;
++ struct socket *socket;
++ int sockfd = 0;
++ __u32 rhport = 0, devid = 0, speed = 0;
++
++ /*
++ * @rhport: port number of vhci_hcd
++ * @sockfd: socket descriptor of an established TCP connection
++ * @devid: unique device identifier in a remote host
++ * @speed: usb device speed in a remote host
++ */
++ sscanf(buf, "%u %u %u %u", &rhport, &sockfd, &devid, &speed);
++
++ dbg_vhci_sysfs("rhport(%u) sockfd(%u) devid(%u) speed(%u)\n",
++ rhport, sockfd, devid, speed);
++
++
++ /* check received parameters */
++ if (valid_args(rhport, speed) < 0)
++ return -EINVAL;
++
++ /* check sockfd */
++ socket = sockfd_to_socket(sockfd);
++ if (!socket)
++ return -EINVAL;
++
++ /* now need lock until setting vdev status as used */
++
++ /* begin a lock */
++ spin_lock(&the_controller->lock);
++
++ vdev = port_to_vdev(rhport);
++
++ spin_lock(&vdev->ud.lock);
++
++ if (vdev->ud.status != VDEV_ST_NULL) {
++ /* end of the lock */
++ spin_unlock(&vdev->ud.lock);
++ spin_unlock(&the_controller->lock);
++
++ uerr("port %d already used\n", rhport);
++ return -EINVAL;
++ }
++
++ uinfo("rhport(%u) sockfd(%d) devid(%u) speed(%u)\n",
++ rhport, sockfd, devid, speed);
++
++ vdev->devid = devid;
++ vdev->speed = speed;
++ vdev->ud.tcp_socket = socket;
++ vdev->ud.status = VDEV_ST_NOTASSIGNED;
++
++ spin_unlock(&vdev->ud.lock);
++ spin_unlock(&the_controller->lock);
++ /* end the lock */
++
++ /*
++ * this function will sleep, so should be out of the lock. but, it's ok
++ * because we already marked vdev as being used. really?
++ */
++ usbip_start_threads(&vdev->ud);
++
++ rh_port_connect(rhport, speed);
++
++ return count;
++}
++static DEVICE_ATTR(attach, S_IWUSR, NULL, store_attach);
++
++static struct attribute *dev_attrs[] = {
++ &dev_attr_status.attr,
++ &dev_attr_detach.attr,
++ &dev_attr_attach.attr,
++ &dev_attr_usbip_debug.attr,
++ NULL,
++};
++
++struct attribute_group dev_attr_group = {
++ .attrs = dev_attrs,
++};
+diff --git a/drivers/staging/usbip/vhci_tx.c b/drivers/staging/usbip/vhci_tx.c
+new file mode 100644
+index 0000000..1f552a9
+--- /dev/null
++++ b/drivers/staging/usbip/vhci_tx.c
+@@ -0,0 +1,239 @@
++/*
++ * Copyright (C) 2003-2008 Takahiro Hirofuchi
++ *
++ * This is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
++ * USA.
++ */
++
++#include "usbip_common.h"
++#include "vhci.h"
++
++
++static void setup_cmd_submit_pdu(struct usbip_header *pdup, struct urb *urb)
++{
++ struct vhci_priv *priv = ((struct vhci_priv *)urb->hcpriv);
++ struct vhci_device *vdev = priv->vdev;
++
++ dbg_vhci_tx("URB, local devnum %u, remote devid %u\n",
++ usb_pipedevice(urb->pipe), vdev->devid);
++
++ pdup->base.command = USBIP_CMD_SUBMIT;
++ pdup->base.seqnum = priv->seqnum;
++ pdup->base.devid = vdev->devid;
++ if (usb_pipein(urb->pipe))
++ pdup->base.direction = USBIP_DIR_IN;
++ else
++ pdup->base.direction = USBIP_DIR_OUT;
++ pdup->base.ep = usb_pipeendpoint(urb->pipe);
++
++ usbip_pack_pdu(pdup, urb, USBIP_CMD_SUBMIT, 1);
++
++ if (urb->setup_packet)
++ memcpy(pdup->u.cmd_submit.setup, urb->setup_packet, 8);
++}
++
++static struct vhci_priv *dequeue_from_priv_tx(struct vhci_device *vdev)
++{
++ unsigned long flags;
++ struct vhci_priv *priv, *tmp;
++
++ spin_lock_irqsave(&vdev->priv_lock, flags);
++
++ list_for_each_entry_safe(priv, tmp, &vdev->priv_tx, list) {
++ list_move_tail(&priv->list, &vdev->priv_rx);
++ spin_unlock_irqrestore(&vdev->priv_lock, flags);
++ return priv;
++ }
++
++ spin_unlock_irqrestore(&vdev->priv_lock, flags);
++
++ return NULL;
++}
++
++
++
++static int vhci_send_cmd_submit(struct vhci_device *vdev)
++{
++ struct vhci_priv *priv = NULL;
++
++ struct msghdr msg;
++ struct kvec iov[3];
++ size_t txsize;
++
++ size_t total_size = 0;
++
++ while ((priv = dequeue_from_priv_tx(vdev)) != NULL) {
++ int ret;
++ struct urb *urb = priv->urb;
++ struct usbip_header pdu_header;
++ void *iso_buffer = NULL;
++
++ txsize = 0;
++ memset(&pdu_header, 0, sizeof(pdu_header));
++ memset(&msg, 0, sizeof(msg));
++ memset(&iov, 0, sizeof(iov));
++
++ dbg_vhci_tx("setup txdata urb %p\n", urb);
++
++
++ /* 1. setup usbip_header */
++ setup_cmd_submit_pdu(&pdu_header, urb);
++ usbip_header_correct_endian(&pdu_header, 1);
++
++ iov[0].iov_base = &pdu_header;
++ iov[0].iov_len = sizeof(pdu_header);
++ txsize += sizeof(pdu_header);
++
++ /* 2. setup transfer buffer */
++ if (!usb_pipein(urb->pipe) && urb->transfer_buffer_length > 0) {
++ iov[1].iov_base = urb->transfer_buffer;
++ iov[1].iov_len = urb->transfer_buffer_length;
++ txsize += urb->transfer_buffer_length;
++ }
++
++ /* 3. setup iso_packet_descriptor */
++ if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
++ ssize_t len = 0;
++
++ iso_buffer = usbip_alloc_iso_desc_pdu(urb, &len);
++ if (!iso_buffer) {
++ usbip_event_add(&vdev->ud,
++ SDEV_EVENT_ERROR_MALLOC);
++ return -1;
++ }
++
++ iov[2].iov_base = iso_buffer;
++ iov[2].iov_len = len;
++ txsize += len;
++ }
++
++ ret = kernel_sendmsg(vdev->ud.tcp_socket, &msg, iov, 3, txsize);
++ if (ret != txsize) {
++ uerr("sendmsg failed!, retval %d for %zd\n", ret,
++ txsize);
++ kfree(iso_buffer);
++ usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_TCP);
++ return -1;
++ }
++
++ kfree(iso_buffer);
++ dbg_vhci_tx("send txdata\n");
++
++ total_size += txsize;
++ }
++
++ return total_size;
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++static struct vhci_unlink *dequeue_from_unlink_tx(struct vhci_device *vdev)
++{
++ unsigned long flags;
++ struct vhci_unlink *unlink, *tmp;
++
++ spin_lock_irqsave(&vdev->priv_lock, flags);
++
++ list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) {
++ list_move_tail(&unlink->list, &vdev->unlink_rx);
++ spin_unlock_irqrestore(&vdev->priv_lock, flags);
++ return unlink;
++ }
++
++ spin_unlock_irqrestore(&vdev->priv_lock, flags);
++
++ return NULL;
++}
++
++static int vhci_send_cmd_unlink(struct vhci_device *vdev)
++{
++ struct vhci_unlink *unlink = NULL;
++
++ struct msghdr msg;
++ struct kvec iov[3];
++ size_t txsize;
++
++ size_t total_size = 0;
++
++ while ((unlink = dequeue_from_unlink_tx(vdev)) != NULL) {
++ int ret;
++ struct usbip_header pdu_header;
++
++ txsize = 0;
++ memset(&pdu_header, 0, sizeof(pdu_header));
++ memset(&msg, 0, sizeof(msg));
++ memset(&iov, 0, sizeof(iov));
++
++ dbg_vhci_tx("setup cmd unlink, %lu \n", unlink->seqnum);
++
++
++ /* 1. setup usbip_header */
++ pdu_header.base.command = USBIP_CMD_UNLINK;
++ pdu_header.base.seqnum = unlink->seqnum;
++ pdu_header.base.devid = vdev->devid;
++ pdu_header.base.ep = 0;
++ pdu_header.u.cmd_unlink.seqnum = unlink->unlink_seqnum;
++
++ usbip_header_correct_endian(&pdu_header, 1);
++
++ iov[0].iov_base = &pdu_header;
++ iov[0].iov_len = sizeof(pdu_header);
++ txsize += sizeof(pdu_header);
++
++ ret = kernel_sendmsg(vdev->ud.tcp_socket, &msg, iov, 1, txsize);
++ if (ret != txsize) {
++ uerr("sendmsg failed!, retval %d for %zd\n", ret,
++ txsize);
++ usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_TCP);
++ return -1;
++ }
++
++
++ dbg_vhci_tx("send txdata\n");
++
++ total_size += txsize;
++ }
++
++ return total_size;
++}
++
++
++/*-------------------------------------------------------------------------*/
++
++void vhci_tx_loop(struct usbip_task *ut)
++{
++ struct usbip_device *ud = container_of(ut, struct usbip_device, tcp_tx);
++ struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
++
++ while (1) {
++ if (signal_pending(current)) {
++ uinfo("vhci_tx signal catched\n");
++ break;
++ }
++
++ if (vhci_send_cmd_submit(vdev) < 0)
++ break;
++
++ if (vhci_send_cmd_unlink(vdev) < 0)
++ break;
++
++ wait_event_interruptible(vdev->waitq_tx,
++ (!list_empty(&vdev->priv_tx) ||
++ !list_empty(&vdev->unlink_tx)));
++
++ dbg_vhci_tx("pending urbs ?, now wake up\n");
++ }
++}
+--
+1.6.0.2
+
projects / ipfire-2.x.git / blobdiff