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path: root/drivers/usb/usbip
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-rw-r--r--drivers/usb/usbip/Kconfig17
-rw-r--r--drivers/usb/usbip/Makefile3
-rw-r--r--drivers/usb/usbip/stub.h1
-rw-r--r--drivers/usb/usbip/stub_dev.c7
-rw-r--r--drivers/usb/usbip/stub_rx.c19
-rw-r--r--drivers/usb/usbip/stub_tx.c11
-rw-r--r--drivers/usb/usbip/usbip_common.c17
-rw-r--r--drivers/usb/usbip/usbip_common.h14
-rw-r--r--drivers/usb/usbip/usbip_event.c168
-rw-r--r--drivers/usb/usbip/vhci_hcd.c2
-rw-r--r--drivers/usb/usbip/vudc.h190
-rw-r--r--drivers/usb/usbip/vudc_dev.c661
-rw-r--r--drivers/usb/usbip/vudc_main.c113
-rw-r--r--drivers/usb/usbip/vudc_rx.c234
-rw-r--r--drivers/usb/usbip/vudc_sysfs.c229
-rw-r--r--drivers/usb/usbip/vudc_transfer.c506
-rw-r--r--drivers/usb/usbip/vudc_tx.c289
17 files changed, 2409 insertions, 72 deletions
diff --git a/drivers/usb/usbip/Kconfig b/drivers/usb/usbip/Kconfig
index bd99e9e47..17646b253 100644
--- a/drivers/usb/usbip/Kconfig
+++ b/drivers/usb/usbip/Kconfig
@@ -1,6 +1,6 @@
config USBIP_CORE
tristate "USB/IP support"
- depends on USB && NET
+ depends on USB_COMMON && NET
---help---
This enables pushing USB packets over IP to allow remote
machines direct access to USB devices. It provides the
@@ -16,7 +16,7 @@ config USBIP_CORE
config USBIP_VHCI_HCD
tristate "VHCI hcd"
- depends on USBIP_CORE
+ depends on USBIP_CORE && USB
---help---
This enables the USB/IP virtual host controller driver,
which is run on the remote machine.
@@ -26,7 +26,7 @@ config USBIP_VHCI_HCD
config USBIP_HOST
tristate "Host driver"
- depends on USBIP_CORE
+ depends on USBIP_CORE && USB
---help---
This enables the USB/IP host driver, which is run on the
machine that is sharing the USB devices.
@@ -34,6 +34,17 @@ config USBIP_HOST
To compile this driver as a module, choose M here: the
module will be called usbip-host.
+config USBIP_VUDC
+ tristate "VUDC driver"
+ depends on USBIP_CORE && USB_GADGET
+ ---help---
+ This enables the USB/IP virtual USB device controller
+ driver, which is run on the host machine, allowing the
+ machine itself to act as a device.
+
+ To compile this driver as a module, choose M here: the
+ module will be called usbip-vudc.
+
config USBIP_DEBUG
bool "Debug messages for USB/IP"
depends on USBIP_CORE
diff --git a/drivers/usb/usbip/Makefile b/drivers/usb/usbip/Makefile
index 9ecd61545..d843a9e68 100644
--- a/drivers/usb/usbip/Makefile
+++ b/drivers/usb/usbip/Makefile
@@ -8,3 +8,6 @@ vhci-hcd-y := vhci_sysfs.o vhci_tx.o vhci_rx.o vhci_hcd.o
obj-$(CONFIG_USBIP_HOST) += usbip-host.o
usbip-host-y := stub_dev.o stub_main.o stub_rx.o stub_tx.o
+
+obj-$(CONFIG_USBIP_VUDC) += usbip-vudc.o
+usbip-vudc-y := vudc_dev.o vudc_sysfs.o vudc_tx.o vudc_rx.o vudc_transfer.o vudc_main.o
diff --git a/drivers/usb/usbip/stub.h b/drivers/usb/usbip/stub.h
index 266e2b0ce..910f02777 100644
--- a/drivers/usb/usbip/stub.h
+++ b/drivers/usb/usbip/stub.h
@@ -33,7 +33,6 @@
#define STUB_BUSID_ALLOC 3
struct stub_device {
- struct usb_interface *interface;
struct usb_device *udev;
struct usbip_device ud;
diff --git a/drivers/usb/usbip/stub_dev.c b/drivers/usb/usbip/stub_dev.c
index a3ec49bdc..c653ce533 100644
--- a/drivers/usb/usbip/stub_dev.c
+++ b/drivers/usb/usbip/stub_dev.c
@@ -219,7 +219,7 @@ static void stub_device_reset(struct usbip_device *ud)
dev_dbg(&udev->dev, "device reset");
- ret = usb_lock_device_for_reset(udev, sdev->interface);
+ ret = usb_lock_device_for_reset(udev, NULL);
if (ret < 0) {
dev_err(&udev->dev, "lock for reset\n");
spin_lock_irq(&ud->lock);
@@ -252,7 +252,7 @@ static void stub_device_unusable(struct usbip_device *ud)
/**
* stub_device_alloc - allocate a new stub_device struct
- * @interface: usb_interface of a new device
+ * @udev: usb_device of a new device
*
* Allocates and initializes a new stub_device struct.
*/
@@ -388,7 +388,6 @@ err_files:
err_port:
dev_set_drvdata(&udev->dev, NULL);
usb_put_dev(udev);
- kthread_stop_put(sdev->ud.eh);
busid_priv->sdev = NULL;
stub_device_free(sdev);
@@ -449,7 +448,7 @@ static void stub_disconnect(struct usb_device *udev)
}
/* If usb reset is called from event handler */
- if (busid_priv->sdev->ud.eh == current)
+ if (usbip_in_eh(current))
return;
/* shutdown the current connection */
diff --git a/drivers/usb/usbip/stub_rx.c b/drivers/usb/usbip/stub_rx.c
index 00e475c51..2df63e305 100644
--- a/drivers/usb/usbip/stub_rx.c
+++ b/drivers/usb/usbip/stub_rx.c
@@ -165,12 +165,7 @@ static int tweak_reset_device_cmd(struct urb *urb)
dev_info(&urb->dev->dev, "usb_queue_reset_device\n");
- /*
- * With the implementation of pre_reset and post_reset the driver no
- * longer unbinds. This allows the use of synchronous reset.
- */
-
- if (usb_lock_device_for_reset(sdev->udev, sdev->interface) < 0) {
+ if (usb_lock_device_for_reset(sdev->udev, NULL) < 0) {
dev_err(&urb->dev->dev, "could not obtain lock to reset device\n");
return 0;
}
@@ -321,7 +316,7 @@ static struct stub_priv *stub_priv_alloc(struct stub_device *sdev,
priv = kmem_cache_zalloc(stub_priv_cache, GFP_ATOMIC);
if (!priv) {
- dev_err(&sdev->interface->dev, "alloc stub_priv\n");
+ dev_err(&sdev->udev->dev, "alloc stub_priv\n");
spin_unlock_irqrestore(&sdev->priv_lock, flags);
usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
return NULL;
@@ -352,7 +347,7 @@ static int get_pipe(struct stub_device *sdev, int epnum, int dir)
else
ep = udev->ep_out[epnum & 0x7f];
if (!ep) {
- dev_err(&sdev->interface->dev, "no such endpoint?, %d\n",
+ dev_err(&sdev->udev->dev, "no such endpoint?, %d\n",
epnum);
BUG();
}
@@ -387,7 +382,7 @@ static int get_pipe(struct stub_device *sdev, int epnum, int dir)
}
/* NOT REACHED */
- dev_err(&sdev->interface->dev, "get pipe, epnum %d\n", epnum);
+ dev_err(&sdev->udev->dev, "get pipe, epnum %d\n", epnum);
return 0;
}
@@ -466,7 +461,7 @@ static void stub_recv_cmd_submit(struct stub_device *sdev,
priv->urb = usb_alloc_urb(0, GFP_KERNEL);
if (!priv->urb) {
- dev_err(&sdev->interface->dev, "malloc urb\n");
+ dev_err(&udev->dev, "malloc urb\n");
usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
return;
}
@@ -486,7 +481,7 @@ static void stub_recv_cmd_submit(struct stub_device *sdev,
priv->urb->setup_packet = kmemdup(&pdu->u.cmd_submit.setup, 8,
GFP_KERNEL);
if (!priv->urb->setup_packet) {
- dev_err(&sdev->interface->dev, "allocate setup_packet\n");
+ dev_err(&udev->dev, "allocate setup_packet\n");
usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
return;
}
@@ -517,7 +512,7 @@ static void stub_recv_cmd_submit(struct stub_device *sdev,
usbip_dbg_stub_rx("submit urb ok, seqnum %u\n",
pdu->base.seqnum);
else {
- dev_err(&sdev->interface->dev, "submit_urb error, %d\n", ret);
+ dev_err(&udev->dev, "submit_urb error, %d\n", ret);
usbip_dump_header(pdu);
usbip_dump_urb(priv->urb);
diff --git a/drivers/usb/usbip/stub_tx.c b/drivers/usb/usbip/stub_tx.c
index dbcabc9db..6b1e8c3f0 100644
--- a/drivers/usb/usbip/stub_tx.c
+++ b/drivers/usb/usbip/stub_tx.c
@@ -97,7 +97,10 @@ void stub_complete(struct urb *urb)
/* link a urb to the queue of tx. */
spin_lock_irqsave(&sdev->priv_lock, flags);
- if (priv->unlinking) {
+ if (sdev->ud.tcp_socket == NULL) {
+ usbip_dbg_stub_tx("ignore urb for closed connection %p", urb);
+ /* It will be freed in stub_device_cleanup_urbs(). */
+ } else if (priv->unlinking) {
stub_enqueue_ret_unlink(sdev, priv->seqnum, urb->status);
stub_free_priv_and_urb(priv);
} else {
@@ -229,7 +232,7 @@ static int stub_send_ret_submit(struct stub_device *sdev)
}
if (txsize != sizeof(pdu_header) + urb->actual_length) {
- dev_err(&sdev->interface->dev,
+ dev_err(&sdev->udev->dev,
"actual length of urb %d does not match iso packet sizes %zu\n",
urb->actual_length,
txsize-sizeof(pdu_header));
@@ -261,7 +264,7 @@ static int stub_send_ret_submit(struct stub_device *sdev)
ret = kernel_sendmsg(sdev->ud.tcp_socket, &msg,
iov, iovnum, txsize);
if (ret != txsize) {
- dev_err(&sdev->interface->dev,
+ dev_err(&sdev->udev->dev,
"sendmsg failed!, retval %d for %zd\n",
ret, txsize);
kfree(iov);
@@ -336,7 +339,7 @@ static int stub_send_ret_unlink(struct stub_device *sdev)
ret = kernel_sendmsg(sdev->ud.tcp_socket, &msg, iov,
1, txsize);
if (ret != txsize) {
- dev_err(&sdev->interface->dev,
+ dev_err(&sdev->udev->dev,
"sendmsg failed!, retval %d for %zd\n",
ret, txsize);
usbip_event_add(&sdev->ud, SDEV_EVENT_ERROR_TCP);
diff --git a/drivers/usb/usbip/usbip_common.c b/drivers/usb/usbip/usbip_common.c
index e40da7759..8b232290b 100644
--- a/drivers/usb/usbip/usbip_common.c
+++ b/drivers/usb/usbip/usbip_common.c
@@ -1,5 +1,7 @@
/*
* Copyright (C) 2003-2008 Takahiro Hirofuchi
+ * Copyright (C) 2015-2016 Samsung Electronics
+ * Krzysztof Opasiak <k.opasiak@samsung.com>
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -643,7 +645,7 @@ int usbip_recv_iso(struct usbip_device *ud, struct urb *urb)
ret);
kfree(buff);
- if (ud->side == USBIP_STUB)
+ if (ud->side == USBIP_STUB || ud->side == USBIP_VUDC)
usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
else
usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
@@ -665,7 +667,7 @@ int usbip_recv_iso(struct usbip_device *ud, struct urb *urb)
"total length of iso packets %d not equal to actual length of buffer %d\n",
total_length, urb->actual_length);
- if (ud->side == USBIP_STUB)
+ if (ud->side == USBIP_STUB || ud->side == USBIP_VUDC)
usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
else
usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
@@ -723,7 +725,7 @@ int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb)
int ret;
int size;
- if (ud->side == USBIP_STUB) {
+ if (ud->side == USBIP_STUB || ud->side == USBIP_VUDC) {
/* the direction of urb must be OUT. */
if (usb_pipein(urb->pipe))
return 0;
@@ -755,7 +757,7 @@ int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb)
ret = usbip_recv(ud->tcp_socket, urb->transfer_buffer, size);
if (ret != size) {
dev_err(&urb->dev->dev, "recv xbuf, %d\n", ret);
- if (ud->side == USBIP_STUB) {
+ if (ud->side == USBIP_STUB || ud->side == USBIP_VUDC) {
usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
} else {
usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
@@ -769,12 +771,19 @@ EXPORT_SYMBOL_GPL(usbip_recv_xbuff);
static int __init usbip_core_init(void)
{
+ int ret;
+
pr_info(DRIVER_DESC " v" USBIP_VERSION "\n");
+ ret = usbip_init_eh();
+ if (ret)
+ return ret;
+
return 0;
}
static void __exit usbip_core_exit(void)
{
+ usbip_finish_eh();
return;
}
diff --git a/drivers/usb/usbip/usbip_common.h b/drivers/usb/usbip/usbip_common.h
index 86b08475c..c7508cbce 100644
--- a/drivers/usb/usbip/usbip_common.h
+++ b/drivers/usb/usbip/usbip_common.h
@@ -1,5 +1,7 @@
/*
* Copyright (C) 2003-2008 Takahiro Hirofuchi
+ * Copyright (C) 2015-2016 Samsung Electronics
+ * Krzysztof Opasiak <k.opasiak@samsung.com>
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -234,6 +236,7 @@ struct usbip_iso_packet_descriptor {
enum usbip_side {
USBIP_VHCI,
USBIP_STUB,
+ USBIP_VUDC,
};
/* event handler */
@@ -248,6 +251,13 @@ enum usbip_side {
#define SDEV_EVENT_ERROR_SUBMIT (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
#define SDEV_EVENT_ERROR_MALLOC (USBIP_EH_SHUTDOWN | USBIP_EH_UNUSABLE)
+#define VUDC_EVENT_REMOVED (USBIP_EH_SHUTDOWN | USBIP_EH_RESET | USBIP_EH_BYE)
+#define VUDC_EVENT_DOWN (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
+#define VUDC_EVENT_ERROR_TCP (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
+/* catastrophic emulated usb error */
+#define VUDC_EVENT_ERROR_USB (USBIP_EH_SHUTDOWN | USBIP_EH_UNUSABLE)
+#define VUDC_EVENT_ERROR_MALLOC (USBIP_EH_SHUTDOWN | USBIP_EH_UNUSABLE)
+
#define VDEV_EVENT_REMOVED (USBIP_EH_SHUTDOWN | USBIP_EH_BYE)
#define VDEV_EVENT_DOWN (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
#define VDEV_EVENT_ERROR_TCP (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
@@ -267,7 +277,6 @@ struct usbip_device {
struct task_struct *tcp_tx;
unsigned long event;
- struct task_struct *eh;
wait_queue_head_t eh_waitq;
struct eh_ops {
@@ -313,10 +322,13 @@ void usbip_pad_iso(struct usbip_device *ud, struct urb *urb);
int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb);
/* usbip_event.c */
+int usbip_init_eh(void);
+void usbip_finish_eh(void);
int usbip_start_eh(struct usbip_device *ud);
void usbip_stop_eh(struct usbip_device *ud);
void usbip_event_add(struct usbip_device *ud, unsigned long event);
int usbip_event_happened(struct usbip_device *ud);
+int usbip_in_eh(struct task_struct *task);
static inline int interface_to_busnum(struct usb_interface *interface)
{
diff --git a/drivers/usb/usbip/usbip_event.c b/drivers/usb/usbip/usbip_event.c
index 2580a32bc..f1635662c 100644
--- a/drivers/usb/usbip/usbip_event.c
+++ b/drivers/usb/usbip/usbip_event.c
@@ -1,5 +1,6 @@
/*
* Copyright (C) 2003-2008 Takahiro Hirofuchi
+ * Copyright (C) 2015 Nobuo Iwata
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -19,17 +20,68 @@
#include <linux/kthread.h>
#include <linux/export.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
#include "usbip_common.h"
-static int event_handler(struct usbip_device *ud)
+struct usbip_event {
+ struct list_head node;
+ struct usbip_device *ud;
+};
+
+static DEFINE_SPINLOCK(event_lock);
+static LIST_HEAD(event_list);
+
+static void set_event(struct usbip_device *ud, unsigned long event)
{
- usbip_dbg_eh("enter\n");
+ unsigned long flags;
- /*
- * Events are handled by only this thread.
- */
- while (usbip_event_happened(ud)) {
+ spin_lock_irqsave(&ud->lock, flags);
+ ud->event |= event;
+ spin_unlock_irqrestore(&ud->lock, flags);
+}
+
+static void unset_event(struct usbip_device *ud, unsigned long event)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&ud->lock, flags);
+ ud->event &= ~event;
+ spin_unlock_irqrestore(&ud->lock, flags);
+}
+
+static struct usbip_device *get_event(void)
+{
+ struct usbip_event *ue = NULL;
+ struct usbip_device *ud = NULL;
+ unsigned long flags;
+
+ spin_lock_irqsave(&event_lock, flags);
+ if (!list_empty(&event_list)) {
+ ue = list_first_entry(&event_list, struct usbip_event, node);
+ list_del(&ue->node);
+ }
+ spin_unlock_irqrestore(&event_lock, flags);
+
+ if (ue) {
+ ud = ue->ud;
+ kfree(ue);
+ }
+ return ud;
+}
+
+static struct task_struct *worker_context;
+
+static void event_handler(struct work_struct *work)
+{
+ struct usbip_device *ud;
+
+ if (worker_context == NULL) {
+ worker_context = current;
+ }
+
+ while ((ud = get_event()) != NULL) {
usbip_dbg_eh("pending event %lx\n", ud->event);
/*
@@ -38,79 +90,102 @@ static int event_handler(struct usbip_device *ud)
*/
if (ud->event & USBIP_EH_SHUTDOWN) {
ud->eh_ops.shutdown(ud);
- ud->event &= ~USBIP_EH_SHUTDOWN;
+ unset_event(ud, USBIP_EH_SHUTDOWN);
}
/* Reset the device. */
if (ud->event & USBIP_EH_RESET) {
ud->eh_ops.reset(ud);
- ud->event &= ~USBIP_EH_RESET;
+ unset_event(ud, USBIP_EH_RESET);
}
/* Mark the device as unusable. */
if (ud->event & USBIP_EH_UNUSABLE) {
ud->eh_ops.unusable(ud);
- ud->event &= ~USBIP_EH_UNUSABLE;
+ unset_event(ud, USBIP_EH_UNUSABLE);
}
/* Stop the error handler. */
if (ud->event & USBIP_EH_BYE)
- return -1;
+ usbip_dbg_eh("removed %p\n", ud);
+
+ wake_up(&ud->eh_waitq);
}
+}
+int usbip_start_eh(struct usbip_device *ud)
+{
+ init_waitqueue_head(&ud->eh_waitq);
+ ud->event = 0;
return 0;
}
+EXPORT_SYMBOL_GPL(usbip_start_eh);
-static int event_handler_loop(void *data)
+void usbip_stop_eh(struct usbip_device *ud)
{
- struct usbip_device *ud = data;
+ unsigned long pending = ud->event & ~USBIP_EH_BYE;
- while (!kthread_should_stop()) {
- wait_event_interruptible(ud->eh_waitq,
- usbip_event_happened(ud) ||
- kthread_should_stop());
- usbip_dbg_eh("wakeup\n");
+ if (!(ud->event & USBIP_EH_BYE))
+ usbip_dbg_eh("usbip_eh stopping but not removed\n");
- if (event_handler(ud) < 0)
- break;
- }
+ if (pending)
+ usbip_dbg_eh("usbip_eh waiting completion %lx\n", pending);
- return 0;
+ wait_event_interruptible(ud->eh_waitq, !(ud->event & ~USBIP_EH_BYE));
+ usbip_dbg_eh("usbip_eh has stopped\n");
}
+EXPORT_SYMBOL_GPL(usbip_stop_eh);
-int usbip_start_eh(struct usbip_device *ud)
-{
- init_waitqueue_head(&ud->eh_waitq);
- ud->event = 0;
+#define WORK_QUEUE_NAME "usbip_event"
- ud->eh = kthread_run(event_handler_loop, ud, "usbip_eh");
- if (IS_ERR(ud->eh)) {
- pr_warn("Unable to start control thread\n");
- return PTR_ERR(ud->eh);
- }
+static struct workqueue_struct *usbip_queue;
+static DECLARE_WORK(usbip_work, event_handler);
+int usbip_init_eh(void)
+{
+ usbip_queue = create_singlethread_workqueue(WORK_QUEUE_NAME);
+ if (usbip_queue == NULL) {
+ pr_err("failed to create usbip_event\n");
+ return -ENOMEM;
+ }
return 0;
}
-EXPORT_SYMBOL_GPL(usbip_start_eh);
-void usbip_stop_eh(struct usbip_device *ud)
+void usbip_finish_eh(void)
{
- if (ud->eh == current)
- return; /* do not wait for myself */
-
- kthread_stop(ud->eh);
- usbip_dbg_eh("usbip_eh has finished\n");
+ flush_workqueue(usbip_queue);
+ destroy_workqueue(usbip_queue);
+ usbip_queue = NULL;
}
-EXPORT_SYMBOL_GPL(usbip_stop_eh);
void usbip_event_add(struct usbip_device *ud, unsigned long event)
{
+ struct usbip_event *ue;
unsigned long flags;
- spin_lock_irqsave(&ud->lock, flags);
- ud->event |= event;
- wake_up(&ud->eh_waitq);
- spin_unlock_irqrestore(&ud->lock, flags);
+ if (ud->event & USBIP_EH_BYE)
+ return;
+
+ set_event(ud, event);
+
+ spin_lock_irqsave(&event_lock, flags);
+
+ list_for_each_entry_reverse(ue, &event_list, node) {
+ if (ue->ud == ud)
+ goto out;
+ }
+
+ ue = kmalloc(sizeof(struct usbip_event), GFP_ATOMIC);
+ if (ue == NULL)
+ goto out;
+
+ ue->ud = ud;
+
+ list_add_tail(&ue->node, &event_list);
+ queue_work(usbip_queue, &usbip_work);
+
+out:
+ spin_unlock_irqrestore(&event_lock, flags);
}
EXPORT_SYMBOL_GPL(usbip_event_add);
@@ -127,3 +202,12 @@ int usbip_event_happened(struct usbip_device *ud)
return happened;
}
EXPORT_SYMBOL_GPL(usbip_event_happened);
+
+int usbip_in_eh(struct task_struct *task)
+{
+ if (task == worker_context)
+ return 1;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(usbip_in_eh);
diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c
index fca511059..2e0450bec 100644
--- a/drivers/usb/usbip/vhci_hcd.c
+++ b/drivers/usb/usbip/vhci_hcd.c
@@ -941,7 +941,7 @@ static void vhci_stop(struct usb_hcd *hcd)
static int vhci_get_frame_number(struct usb_hcd *hcd)
{
- pr_err("Not yet implemented\n");
+ dev_err_ratelimited(&hcd->self.root_hub->dev, "Not yet implemented\n");
return 0;
}
diff --git a/drivers/usb/usbip/vudc.h b/drivers/usb/usbip/vudc.h
new file mode 100644
index 000000000..25e01b09c
--- /dev/null
+++ b/drivers/usb/usbip/vudc.h
@@ -0,0 +1,190 @@
+/*
+ * Copyright (C) 2015 Karol Kosik <karo9@interia.eu>
+ * Copyright (C) 2015-2016 Samsung Electronics
+ * Igor Kotrasinski <i.kotrasinsk@samsung.com>
+ * Krzysztof Opasiak <k.opasiak@samsung.com>
+ *
+ * This program 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 program 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __USBIP_VUDC_H
+#define __USBIP_VUDC_H
+
+#include <linux/platform_device.h>
+#include <linux/usb.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/ch9.h>
+#include <linux/list.h>
+#include <linux/timer.h>
+#include <linux/time.h>
+#include <linux/sysfs.h>
+
+#include "usbip_common.h"
+
+#define GADGET_NAME "usbip-vudc"
+
+struct vep {
+ struct usb_ep ep;
+ unsigned type:2; /* type, as USB_ENDPOINT_XFER_* */
+ char name[8]; /* space for ep name */
+
+ const struct usb_endpoint_descriptor *desc;
+ struct usb_gadget *gadget;
+ struct list_head req_queue; /* Request queue */
+ unsigned halted:1;
+ unsigned wedged:1;
+ unsigned already_seen:1;
+ unsigned setup_stage:1;
+};
+
+struct vrequest {
+ struct usb_request req;
+ struct vudc *udc;
+ struct list_head req_entry; /* Request queue */
+};
+
+struct urbp {
+ struct urb *urb;
+ struct vep *ep;
+ struct list_head urb_entry; /* urb queue */
+ unsigned long seqnum;
+ unsigned type:2; /* for tx, since ep type can change after */
+ unsigned new:1;
+};
+
+struct v_unlink {
+ unsigned long seqnum;
+ __u32 status;
+};
+
+enum tx_type {
+ TX_UNLINK,
+ TX_SUBMIT,
+};
+
+struct tx_item {
+ struct list_head tx_entry;
+ enum tx_type type;
+ union {
+ struct urbp *s;
+ struct v_unlink *u;
+ };
+};
+
+enum tr_state {
+ VUDC_TR_RUNNING,
+ VUDC_TR_IDLE,
+ VUDC_TR_STOPPED,
+};
+
+struct transfer_timer {
+ struct timer_list timer;
+ enum tr_state state;
+ unsigned long frame_start;
+ int frame_limit;
+};
+
+struct vudc {
+ struct usb_gadget gadget;
+ struct usb_gadget_driver *driver;
+ struct platform_device *pdev;
+
+ struct usb_device_descriptor dev_desc;
+
+ struct usbip_device ud;
+ struct transfer_timer tr_timer;
+ struct timeval start_time;
+
+ struct list_head urb_queue;
+
+ spinlock_t lock_tx;
+ struct list_head tx_queue;
+ wait_queue_head_t tx_waitq;
+
+ spinlock_t lock;
+ struct vep *ep;
+ int address;
+ u16 devstatus;
+
+ unsigned pullup:1;
+ unsigned connected:1;
+ unsigned desc_cached:1;
+};
+
+struct vudc_device {
+ struct platform_device *pdev;
+ struct list_head dev_entry;
+};
+
+extern const struct attribute_group vudc_attr_group;
+
+/* visible everywhere */
+
+static inline struct vep *to_vep(struct usb_ep *_ep)
+{
+ return container_of(_ep, struct vep, ep);
+}
+
+static inline struct vrequest *to_vrequest(
+ struct usb_request *_req)
+{
+ return container_of(_req, struct vrequest, req);
+}
+
+static inline struct vudc *usb_gadget_to_vudc(
+ struct usb_gadget *_gadget)
+{
+ return container_of(_gadget, struct vudc, gadget);
+}
+
+static inline struct vudc *ep_to_vudc(struct vep *ep)
+{
+ return container_of(ep->gadget, struct vudc, gadget);
+}
+
+/* vudc_sysfs.c */
+
+int get_gadget_descs(struct vudc *udc);
+
+/* vudc_tx.c */
+
+int v_tx_loop(void *data);
+void v_enqueue_ret_unlink(struct vudc *udc, __u32 seqnum, __u32 status);
+void v_enqueue_ret_submit(struct vudc *udc, struct urbp *urb_p);
+
+/* vudc_rx.c */
+
+int v_rx_loop(void *data);
+
+/* vudc_transfer.c */
+
+void v_init_timer(struct vudc *udc);
+void v_start_timer(struct vudc *udc);
+void v_kick_timer(struct vudc *udc, unsigned long time);
+void v_stop_timer(struct vudc *udc);
+
+/* vudc_dev.c */
+
+struct urbp *alloc_urbp(void);
+void free_urbp_and_urb(struct urbp *urb_p);
+
+struct vep *vudc_find_endpoint(struct vudc *udc, u8 address);
+
+struct vudc_device *alloc_vudc_device(int devid);
+void put_vudc_device(struct vudc_device *udc_dev);
+
+int vudc_probe(struct platform_device *pdev);
+int vudc_remove(struct platform_device *pdev);
+
+#endif /* __USBIP_VUDC_H */
diff --git a/drivers/usb/usbip/vudc_dev.c b/drivers/usb/usbip/vudc_dev.c
new file mode 100644
index 000000000..8994a1381
--- /dev/null
+++ b/drivers/usb/usbip/vudc_dev.c
@@ -0,0 +1,661 @@
+/*
+ * Copyright (C) 2015 Karol Kosik <karo9@interia.eu>
+ * Copyright (C) 2015-2016 Samsung Electronics
+ * Igor Kotrasinski <i.kotrasinsk@samsung.com>
+ * Krzysztof Opasiak <k.opasiak@samsung.com>
+ *
+ * This program 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 program 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/platform_device.h>
+#include <linux/usb.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/hcd.h>
+#include <linux/kthread.h>
+#include <linux/file.h>
+#include <linux/byteorder/generic.h>
+
+#include "usbip_common.h"
+#include "vudc.h"
+
+#define VIRTUAL_ENDPOINTS (1 /* ep0 */ + 15 /* in eps */ + 15 /* out eps */)
+
+/* urb-related structures alloc / free */
+
+
+static void free_urb(struct urb *urb)
+{
+ if (!urb)
+ return;
+
+ kfree(urb->setup_packet);
+ urb->setup_packet = NULL;
+
+ kfree(urb->transfer_buffer);
+ urb->transfer_buffer = NULL;
+
+ usb_free_urb(urb);
+}
+
+struct urbp *alloc_urbp(void)
+{
+ struct urbp *urb_p;
+
+ urb_p = kzalloc(sizeof(*urb_p), GFP_KERNEL);
+ if (!urb_p)
+ return urb_p;
+
+ urb_p->urb = NULL;
+ urb_p->ep = NULL;
+ INIT_LIST_HEAD(&urb_p->urb_entry);
+ return urb_p;
+}
+
+static void free_urbp(struct urbp *urb_p)
+{
+ kfree(urb_p);
+}
+
+void free_urbp_and_urb(struct urbp *urb_p)
+{
+ if (!urb_p)
+ return;
+ free_urb(urb_p->urb);
+ free_urbp(urb_p);
+}
+
+
+/* utilities ; almost verbatim from dummy_hcd.c */
+
+/* called with spinlock held */
+static void nuke(struct vudc *udc, struct vep *ep)
+{
+ struct vrequest *req;
+
+ while (!list_empty(&ep->req_queue)) {
+ req = list_first_entry(&ep->req_queue, struct vrequest,
+ req_entry);
+ list_del_init(&req->req_entry);
+ req->req.status = -ESHUTDOWN;
+
+ spin_unlock(&udc->lock);
+ usb_gadget_giveback_request(&ep->ep, &req->req);
+ spin_lock(&udc->lock);
+ }
+}
+
+/* caller must hold lock */
+static void stop_activity(struct vudc *udc)
+{
+ int i;
+ struct urbp *urb_p, *tmp;
+
+ udc->address = 0;
+
+ for (i = 0; i < VIRTUAL_ENDPOINTS; i++)
+ nuke(udc, &udc->ep[i]);
+
+ list_for_each_entry_safe(urb_p, tmp, &udc->urb_queue, urb_entry) {
+ list_del(&urb_p->urb_entry);
+ free_urbp_and_urb(urb_p);
+ }
+}
+
+struct vep *vudc_find_endpoint(struct vudc *udc, u8 address)
+{
+ int i;
+
+ if ((address & ~USB_DIR_IN) == 0)
+ return &udc->ep[0];
+
+ for (i = 1; i < VIRTUAL_ENDPOINTS; i++) {
+ struct vep *ep = &udc->ep[i];
+
+ if (!ep->desc)
+ continue;
+ if (ep->desc->bEndpointAddress == address)
+ return ep;
+ }
+ return NULL;
+}
+
+/* gadget ops */
+
+/* FIXME - this will probably misbehave when suspend/resume is added */
+static int vgadget_get_frame(struct usb_gadget *_gadget)
+{
+ struct timeval now;
+ struct vudc *udc = usb_gadget_to_vudc(_gadget);
+
+ do_gettimeofday(&now);
+ return ((now.tv_sec - udc->start_time.tv_sec) * 1000 +
+ (now.tv_usec - udc->start_time.tv_usec) / 1000)
+ % 0x7FF;
+}
+
+static int vgadget_set_selfpowered(struct usb_gadget *_gadget, int value)
+{
+ struct vudc *udc = usb_gadget_to_vudc(_gadget);
+
+ if (value)
+ udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
+ else
+ udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
+ return 0;
+}
+
+static int vgadget_pullup(struct usb_gadget *_gadget, int value)
+{
+ struct vudc *udc = usb_gadget_to_vudc(_gadget);
+ unsigned long flags;
+ int ret;
+
+
+ spin_lock_irqsave(&udc->lock, flags);
+ value = !!value;
+ if (value == udc->pullup)
+ goto unlock;
+
+ udc->pullup = value;
+ if (value) {
+ udc->gadget.speed = min_t(u8, USB_SPEED_HIGH,
+ udc->driver->max_speed);
+ udc->ep[0].ep.maxpacket = 64;
+ /*
+ * This is the first place where we can ask our
+ * gadget driver for descriptors.
+ */
+ ret = get_gadget_descs(udc);
+ if (ret) {
+ dev_err(&udc->gadget.dev, "Unable go get desc: %d", ret);
+ goto unlock;
+ }
+
+ spin_unlock_irqrestore(&udc->lock, flags);
+ usbip_start_eh(&udc->ud);
+ } else {
+ /* Invalidate descriptors */
+ udc->desc_cached = 0;
+
+ spin_unlock_irqrestore(&udc->lock, flags);
+ usbip_event_add(&udc->ud, VUDC_EVENT_REMOVED);
+ usbip_stop_eh(&udc->ud); /* Wait for eh completion */
+ }
+
+ return 0;
+
+unlock:
+ spin_unlock_irqrestore(&udc->lock, flags);
+ return 0;
+}
+
+static int vgadget_udc_start(struct usb_gadget *g,
+ struct usb_gadget_driver *driver)
+{
+ struct vudc *udc = usb_gadget_to_vudc(g);
+ unsigned long flags;
+
+ spin_lock_irqsave(&udc->lock, flags);
+ udc->driver = driver;
+ udc->pullup = udc->connected = udc->desc_cached = 0;
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return 0;
+}
+
+static int vgadget_udc_stop(struct usb_gadget *g)
+{
+ struct vudc *udc = usb_gadget_to_vudc(g);
+ unsigned long flags;
+
+ spin_lock_irqsave(&udc->lock, flags);
+ udc->driver = NULL;
+ spin_unlock_irqrestore(&udc->lock, flags);
+ return 0;
+}
+
+static const struct usb_gadget_ops vgadget_ops = {
+ .get_frame = vgadget_get_frame,
+ .set_selfpowered = vgadget_set_selfpowered,
+ .pullup = vgadget_pullup,
+ .udc_start = vgadget_udc_start,
+ .udc_stop = vgadget_udc_stop,
+};
+
+
+/* endpoint ops */
+
+static int vep_enable(struct usb_ep *_ep,
+ const struct usb_endpoint_descriptor *desc)
+{
+ struct vep *ep;
+ struct vudc *udc;
+ unsigned maxp;
+ unsigned long flags;
+
+ ep = to_vep(_ep);
+ udc = ep_to_vudc(ep);
+
+ if (!_ep || !desc || ep->desc || _ep->caps.type_control
+ || desc->bDescriptorType != USB_DT_ENDPOINT)
+ return -EINVAL;
+
+ if (!udc->driver)
+ return -ESHUTDOWN;
+
+ spin_lock_irqsave(&udc->lock, flags);
+
+ maxp = usb_endpoint_maxp(desc) & 0x7ff;
+ _ep->maxpacket = maxp;
+ ep->desc = desc;
+ ep->type = usb_endpoint_type(desc);
+ ep->halted = ep->wedged = 0;
+
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return 0;
+}
+
+static int vep_disable(struct usb_ep *_ep)
+{
+ struct vep *ep;
+ struct vudc *udc;
+ unsigned long flags;
+
+ ep = to_vep(_ep);
+ udc = ep_to_vudc(ep);
+ if (!_ep || !ep->desc || _ep->caps.type_control)
+ return -EINVAL;
+
+ spin_lock_irqsave(&udc->lock, flags);
+ ep->desc = NULL;
+ nuke(udc, ep);
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return 0;
+}
+
+static struct usb_request *vep_alloc_request(struct usb_ep *_ep,
+ gfp_t mem_flags)
+{
+ struct vep *ep;
+ struct vrequest *req;
+
+ if (!_ep)
+ return NULL;
+ ep = to_vep(_ep);
+
+ req = kzalloc(sizeof(*req), mem_flags);
+ if (!req)
+ return NULL;
+
+ INIT_LIST_HEAD(&req->req_entry);
+
+ return &req->req;
+}
+
+static void vep_free_request(struct usb_ep *_ep, struct usb_request *_req)
+{
+ struct vrequest *req;
+
+ if (WARN_ON(!_ep || !_req))
+ return;
+
+ req = to_vrequest(_req);
+ kfree(req);
+}
+
+static int vep_queue(struct usb_ep *_ep, struct usb_request *_req,
+ gfp_t mem_flags)
+{
+ struct vep *ep;
+ struct vrequest *req;
+ struct vudc *udc;
+ unsigned long flags;
+
+ if (!_ep || !_req)
+ return -EINVAL;
+
+ ep = to_vep(_ep);
+ req = to_vrequest(_req);
+ udc = ep_to_vudc(ep);
+
+ spin_lock_irqsave(&udc->lock, flags);
+ _req->actual = 0;
+ _req->status = -EINPROGRESS;
+
+ list_add_tail(&req->req_entry, &ep->req_queue);
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return 0;
+}
+
+static int vep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
+{
+ struct vep *ep;
+ struct vrequest *req;
+ struct vudc *udc;
+ struct vrequest *lst;
+ unsigned long flags;
+ int ret = -EINVAL;
+
+ if (!_ep || !_req)
+ return ret;
+
+ ep = to_vep(_ep);
+ req = to_vrequest(_req);
+ udc = req->udc;
+
+ if (!udc->driver)
+ return -ESHUTDOWN;
+
+ spin_lock_irqsave(&udc->lock, flags);
+ list_for_each_entry(lst, &ep->req_queue, req_entry) {
+ if (&lst->req == _req) {
+ list_del_init(&lst->req_entry);
+ _req->status = -ECONNRESET;
+ ret = 0;
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ if (ret == 0)
+ usb_gadget_giveback_request(_ep, _req);
+
+ return ret;
+}
+
+static int
+vep_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
+{
+ struct vep *ep;
+ struct vudc *udc;
+ unsigned long flags;
+ int ret = 0;
+
+ ep = to_vep(_ep);
+ if (!_ep)
+ return -EINVAL;
+
+ udc = ep_to_vudc(ep);
+ if (!udc->driver)
+ return -ESHUTDOWN;
+
+ spin_lock_irqsave(&udc->lock, flags);
+ if (!value)
+ ep->halted = ep->wedged = 0;
+ else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
+ !list_empty(&ep->req_queue))
+ ret = -EAGAIN;
+ else {
+ ep->halted = 1;
+ if (wedged)
+ ep->wedged = 1;
+ }
+
+ spin_unlock_irqrestore(&udc->lock, flags);
+ return ret;
+}
+
+static int
+vep_set_halt(struct usb_ep *_ep, int value)
+{
+ return vep_set_halt_and_wedge(_ep, value, 0);
+}
+
+static int vep_set_wedge(struct usb_ep *_ep)
+{
+ return vep_set_halt_and_wedge(_ep, 1, 1);
+}
+
+static const struct usb_ep_ops vep_ops = {
+ .enable = vep_enable,
+ .disable = vep_disable,
+
+ .alloc_request = vep_alloc_request,
+ .free_request = vep_free_request,
+
+ .queue = vep_queue,
+ .dequeue = vep_dequeue,
+
+ .set_halt = vep_set_halt,
+ .set_wedge = vep_set_wedge,
+};
+
+
+/* shutdown / reset / error handlers */
+
+static void vudc_shutdown(struct usbip_device *ud)
+{
+ struct vudc *udc = container_of(ud, struct vudc, ud);
+ int call_disconnect = 0;
+ unsigned long flags;
+
+ dev_dbg(&udc->pdev->dev, "device shutdown");
+ if (ud->tcp_socket)
+ kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR);
+
+ if (ud->tcp_tx) {
+ kthread_stop_put(ud->tcp_rx);
+ ud->tcp_rx = NULL;
+ }
+ if (ud->tcp_tx) {
+ kthread_stop_put(ud->tcp_tx);
+ ud->tcp_tx = NULL;
+ }
+
+ if (ud->tcp_socket) {
+ sockfd_put(ud->tcp_socket);
+ ud->tcp_socket = NULL;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ stop_activity(udc);
+ if (udc->connected && udc->driver->disconnect)
+ call_disconnect = 1;
+ udc->connected = 0;
+ spin_unlock_irqrestore(&udc->lock, flags);
+ if (call_disconnect)
+ udc->driver->disconnect(&udc->gadget);
+}
+
+static void vudc_device_reset(struct usbip_device *ud)
+{
+ struct vudc *udc = container_of(ud, struct vudc, ud);
+ unsigned long flags;
+
+ dev_dbg(&udc->pdev->dev, "device reset");
+ spin_lock_irqsave(&udc->lock, flags);
+ stop_activity(udc);
+ spin_unlock_irqrestore(&udc->lock, flags);
+ if (udc->driver)
+ usb_gadget_udc_reset(&udc->gadget, udc->driver);
+ spin_lock_irqsave(&ud->lock, flags);
+ ud->status = SDEV_ST_AVAILABLE;
+ spin_unlock_irqrestore(&ud->lock, flags);
+}
+
+static void vudc_device_unusable(struct usbip_device *ud)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&ud->lock, flags);
+ ud->status = SDEV_ST_ERROR;
+ spin_unlock_irqrestore(&ud->lock, flags);
+}
+
+/* device setup / cleanup */
+
+struct vudc_device *alloc_vudc_device(int devid)
+{
+ struct vudc_device *udc_dev = NULL;
+
+ udc_dev = kzalloc(sizeof(*udc_dev), GFP_KERNEL);
+ if (!udc_dev)
+ goto out;
+
+ INIT_LIST_HEAD(&udc_dev->dev_entry);
+
+ udc_dev->pdev = platform_device_alloc(GADGET_NAME, devid);
+ if (!udc_dev->pdev) {
+ kfree(udc_dev);
+ udc_dev = NULL;
+ }
+
+out:
+ return udc_dev;
+}
+
+void put_vudc_device(struct vudc_device *udc_dev)
+{
+ platform_device_put(udc_dev->pdev);
+ kfree(udc_dev);
+}
+
+static int init_vudc_hw(struct vudc *udc)
+{
+ int i;
+ struct usbip_device *ud = &udc->ud;
+ struct vep *ep;
+
+ udc->ep = kcalloc(VIRTUAL_ENDPOINTS, sizeof(*udc->ep), GFP_KERNEL);
+ if (!udc->ep)
+ goto nomem_ep;
+
+ INIT_LIST_HEAD(&udc->gadget.ep_list);
+
+ /* create ep0 and 15 in, 15 out general purpose eps */
+ for (i = 0; i < VIRTUAL_ENDPOINTS; ++i) {
+ int is_out = i % 2;
+ int num = (i + 1) / 2;
+
+ ep = &udc->ep[i];
+
+ sprintf(ep->name, "ep%d%s", num,
+ i ? (is_out ? "out" : "in") : "");
+ ep->ep.name = ep->name;
+ if (i == 0) {
+ ep->ep.caps.type_control = true;
+ ep->ep.caps.dir_out = true;
+ ep->ep.caps.dir_in = true;
+ } else {
+ ep->ep.caps.type_iso = true;
+ ep->ep.caps.type_int = true;
+ ep->ep.caps.type_bulk = true;
+ }
+
+ if (is_out)
+ ep->ep.caps.dir_out = true;
+ else
+ ep->ep.caps.dir_in = true;
+
+ ep->ep.ops = &vep_ops;
+ list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
+ ep->halted = ep->wedged = ep->already_seen =
+ ep->setup_stage = 0;
+ usb_ep_set_maxpacket_limit(&ep->ep, ~0);
+ ep->ep.max_streams = 16;
+ ep->gadget = &udc->gadget;
+ ep->desc = NULL;
+ INIT_LIST_HEAD(&ep->req_queue);
+ }
+
+ spin_lock_init(&udc->lock);
+ spin_lock_init(&udc->lock_tx);
+ INIT_LIST_HEAD(&udc->urb_queue);
+ INIT_LIST_HEAD(&udc->tx_queue);
+ init_waitqueue_head(&udc->tx_waitq);
+
+ spin_lock_init(&ud->lock);
+ ud->status = SDEV_ST_AVAILABLE;
+ ud->side = USBIP_VUDC;
+
+ ud->eh_ops.shutdown = vudc_shutdown;
+ ud->eh_ops.reset = vudc_device_reset;
+ ud->eh_ops.unusable = vudc_device_unusable;
+
+ udc->gadget.ep0 = &udc->ep[0].ep;
+ list_del_init(&udc->ep[0].ep.ep_list);
+
+ v_init_timer(udc);
+ return 0;
+
+nomem_ep:
+ return -ENOMEM;
+}
+
+static void cleanup_vudc_hw(struct vudc *udc)
+{
+ kfree(udc->ep);
+}
+
+/* platform driver ops */
+
+int vudc_probe(struct platform_device *pdev)
+{
+ struct vudc *udc;
+ int ret = -ENOMEM;
+
+ udc = kzalloc(sizeof(*udc), GFP_KERNEL);
+ if (!udc)
+ goto out;
+
+ udc->gadget.name = GADGET_NAME;
+ udc->gadget.ops = &vgadget_ops;
+ udc->gadget.max_speed = USB_SPEED_HIGH;
+ udc->gadget.dev.parent = &pdev->dev;
+ udc->pdev = pdev;
+
+ ret = init_vudc_hw(udc);
+ if (ret)
+ goto err_init_vudc_hw;
+
+ ret = usb_add_gadget_udc(&pdev->dev, &udc->gadget);
+ if (ret < 0)
+ goto err_add_udc;
+
+ ret = sysfs_create_group(&pdev->dev.kobj, &vudc_attr_group);
+ if (ret) {
+ dev_err(&udc->pdev->dev, "create sysfs files\n");
+ goto err_sysfs;
+ }
+
+ platform_set_drvdata(pdev, udc);
+
+ return ret;
+
+err_sysfs:
+ usb_del_gadget_udc(&udc->gadget);
+err_add_udc:
+ cleanup_vudc_hw(udc);
+err_init_vudc_hw:
+ kfree(udc);
+out:
+ return ret;
+}
+
+int vudc_remove(struct platform_device *pdev)
+{
+ struct vudc *udc = platform_get_drvdata(pdev);
+
+ sysfs_remove_group(&pdev->dev.kobj, &vudc_attr_group);
+ usb_del_gadget_udc(&udc->gadget);
+ cleanup_vudc_hw(udc);
+ kfree(udc);
+ return 0;
+}
diff --git a/drivers/usb/usbip/vudc_main.c b/drivers/usb/usbip/vudc_main.c
new file mode 100644
index 000000000..9e655714e
--- /dev/null
+++ b/drivers/usb/usbip/vudc_main.c
@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2015 Karol Kosik <karo9@interia.eu>
+ * Copyright (C) 2015-2016 Samsung Electronics
+ * Igor Kotrasinski <i.kotrasinsk@samsung.com>
+ * Krzysztof Opasiak <k.opasiak@samsung.com>
+ *
+ * This program 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 program 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/module.h>
+
+#include "vudc.h"
+
+static unsigned int vudc_number = 1;
+
+module_param_named(num, vudc_number, uint, S_IRUGO);
+MODULE_PARM_DESC(num, "number of emulated controllers");
+
+static struct platform_driver vudc_driver = {
+ .probe = vudc_probe,
+ .remove = vudc_remove,
+ .driver = {
+ .name = GADGET_NAME,
+ },
+};
+
+static struct list_head vudc_devices = LIST_HEAD_INIT(vudc_devices);
+
+static int __init init(void)
+{
+ int retval = -ENOMEM;
+ int i;
+ struct vudc_device *udc_dev = NULL, *udc_dev2 = NULL;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ if (vudc_number < 1) {
+ pr_err("Number of emulated UDC must be no less than 1");
+ return -EINVAL;
+ }
+
+ retval = platform_driver_register(&vudc_driver);
+ if (retval < 0)
+ goto out;
+
+ for (i = 0; i < vudc_number; i++) {
+ udc_dev = alloc_vudc_device(i);
+ if (!udc_dev) {
+ retval = -ENOMEM;
+ goto cleanup;
+ }
+
+ retval = platform_device_add(udc_dev->pdev);
+ if (retval < 0) {
+ put_vudc_device(udc_dev);
+ goto cleanup;
+ }
+
+ list_add_tail(&udc_dev->dev_entry, &vudc_devices);
+ if (!platform_get_drvdata(udc_dev->pdev)) {
+ /*
+ * The udc was added successfully but its probe
+ * function failed for some reason.
+ */
+ retval = -EINVAL;
+ goto cleanup;
+ }
+ }
+ goto out;
+
+cleanup:
+ list_for_each_entry_safe(udc_dev, udc_dev2, &vudc_devices, dev_entry) {
+ list_del(&udc_dev->dev_entry);
+ platform_device_del(udc_dev->pdev);
+ put_vudc_device(udc_dev);
+ }
+
+ platform_driver_unregister(&vudc_driver);
+out:
+ return retval;
+}
+module_init(init);
+
+static void __exit cleanup(void)
+{
+ struct vudc_device *udc_dev = NULL, *udc_dev2 = NULL;
+
+ list_for_each_entry_safe(udc_dev, udc_dev2, &vudc_devices, dev_entry) {
+ list_del(&udc_dev->dev_entry);
+ platform_device_unregister(udc_dev->pdev);
+ put_vudc_device(udc_dev);
+ }
+ platform_driver_unregister(&vudc_driver);
+}
+module_exit(cleanup);
+
+MODULE_DESCRIPTION("USB over IP Device Controller");
+MODULE_AUTHOR("Krzysztof Opasiak, Karol Kosik, Igor Kotrasinski");
+MODULE_LICENSE("GPL");
diff --git a/drivers/usb/usbip/vudc_rx.c b/drivers/usb/usbip/vudc_rx.c
new file mode 100644
index 000000000..344bd9473
--- /dev/null
+++ b/drivers/usb/usbip/vudc_rx.c
@@ -0,0 +1,234 @@
+/*
+ * Copyright (C) 2015 Karol Kosik <karo9@interia.eu>
+ * Copyright (C) 2015-2016 Samsung Electronics
+ * Igor Kotrasinski <i.kotrasinsk@samsung.com>
+ *
+ * This program 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 program 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <net/sock.h>
+#include <linux/list.h>
+#include <linux/kthread.h>
+
+#include "usbip_common.h"
+#include "vudc.h"
+
+static int alloc_urb_from_cmd(struct urb **urbp,
+ struct usbip_header *pdu, u8 type)
+{
+ struct urb *urb;
+
+ if (type == USB_ENDPOINT_XFER_ISOC)
+ urb = usb_alloc_urb(pdu->u.cmd_submit.number_of_packets,
+ GFP_KERNEL);
+ else
+ urb = usb_alloc_urb(0, GFP_KERNEL);
+
+ if (!urb)
+ goto err;
+
+ usbip_pack_pdu(pdu, urb, USBIP_CMD_SUBMIT, 0);
+
+ if (urb->transfer_buffer_length > 0) {
+ urb->transfer_buffer = kzalloc(urb->transfer_buffer_length,
+ GFP_KERNEL);
+ if (!urb->transfer_buffer)
+ goto free_urb;
+ }
+
+ urb->setup_packet = kmemdup(&pdu->u.cmd_submit.setup, 8,
+ GFP_KERNEL);
+ if (!urb->setup_packet)
+ goto free_buffer;
+
+ /*
+ * FIXME - we only setup pipe enough for usbip functions
+ * to behave nicely
+ */
+ urb->pipe |= pdu->base.direction == USBIP_DIR_IN ?
+ USB_DIR_IN : USB_DIR_OUT;
+
+ *urbp = urb;
+ return 0;
+
+free_buffer:
+ kfree(urb->transfer_buffer);
+ urb->transfer_buffer = NULL;
+free_urb:
+ usb_free_urb(urb);
+err:
+ return -ENOMEM;
+}
+
+static int v_recv_cmd_unlink(struct vudc *udc,
+ struct usbip_header *pdu)
+{
+ unsigned long flags;
+ struct urbp *urb_p;
+
+ spin_lock_irqsave(&udc->lock, flags);
+ list_for_each_entry(urb_p, &udc->urb_queue, urb_entry) {
+ if (urb_p->seqnum != pdu->u.cmd_unlink.seqnum)
+ continue;
+ urb_p->urb->unlinked = -ECONNRESET;
+ urb_p->seqnum = pdu->base.seqnum;
+ v_kick_timer(udc, jiffies);
+ spin_unlock_irqrestore(&udc->lock, flags);
+ return 0;
+ }
+ /* Not found, completed / not queued */
+ spin_lock(&udc->lock_tx);
+ v_enqueue_ret_unlink(udc, pdu->base.seqnum, 0);
+ wake_up(&udc->tx_waitq);
+ spin_unlock(&udc->lock_tx);
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return 0;
+}
+
+static int v_recv_cmd_submit(struct vudc *udc,
+ struct usbip_header *pdu)
+{
+ int ret = 0;
+ struct urbp *urb_p;
+ u8 address;
+ unsigned long flags;
+
+ urb_p = alloc_urbp();
+ if (!urb_p) {
+ usbip_event_add(&udc->ud, VUDC_EVENT_ERROR_MALLOC);
+ return -ENOMEM;
+ }
+
+ /* base.ep is pipeendpoint(pipe) */
+ address = pdu->base.ep;
+ if (pdu->base.direction == USBIP_DIR_IN)
+ address |= USB_DIR_IN;
+
+ spin_lock_irq(&udc->lock);
+ urb_p->ep = vudc_find_endpoint(udc, address);
+ if (!urb_p->ep) {
+ /* we don't know the type, there may be isoc data! */
+ dev_err(&udc->pdev->dev, "request to nonexistent endpoint");
+ spin_unlock_irq(&udc->lock);
+ usbip_event_add(&udc->ud, VUDC_EVENT_ERROR_TCP);
+ ret = -EPIPE;
+ goto free_urbp;
+ }
+ urb_p->type = urb_p->ep->type;
+ spin_unlock_irq(&udc->lock);
+
+ urb_p->new = 1;
+ urb_p->seqnum = pdu->base.seqnum;
+
+ ret = alloc_urb_from_cmd(&urb_p->urb, pdu, urb_p->ep->type);
+ if (ret) {
+ usbip_event_add(&udc->ud, VUDC_EVENT_ERROR_MALLOC);
+ ret = -ENOMEM;
+ goto free_urbp;
+ }
+
+ urb_p->urb->status = -EINPROGRESS;
+
+ /* FIXME: more pipe setup to please usbip_common */
+ urb_p->urb->pipe &= ~(11 << 30);
+ switch (urb_p->ep->type) {
+ case USB_ENDPOINT_XFER_BULK:
+ urb_p->urb->pipe |= (PIPE_BULK << 30);
+ break;
+ case USB_ENDPOINT_XFER_INT:
+ urb_p->urb->pipe |= (PIPE_INTERRUPT << 30);
+ break;
+ case USB_ENDPOINT_XFER_CONTROL:
+ urb_p->urb->pipe |= (PIPE_CONTROL << 30);
+ break;
+ case USB_ENDPOINT_XFER_ISOC:
+ urb_p->urb->pipe |= (PIPE_ISOCHRONOUS << 30);
+ break;
+ }
+ ret = usbip_recv_xbuff(&udc->ud, urb_p->urb);
+ if (ret < 0)
+ goto free_urbp;
+
+ ret = usbip_recv_iso(&udc->ud, urb_p->urb);
+ if (ret < 0)
+ goto free_urbp;
+
+ spin_lock_irqsave(&udc->lock, flags);
+ v_kick_timer(udc, jiffies);
+ list_add_tail(&urb_p->urb_entry, &udc->urb_queue);
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return 0;
+
+free_urbp:
+ free_urbp_and_urb(urb_p);
+ return ret;
+}
+
+static int v_rx_pdu(struct usbip_device *ud)
+{
+ int ret;
+ struct usbip_header pdu;
+ struct vudc *udc = container_of(ud, struct vudc, ud);
+
+ memset(&pdu, 0, sizeof(pdu));
+ ret = usbip_recv(ud->tcp_socket, &pdu, sizeof(pdu));
+ if (ret != sizeof(pdu)) {
+ usbip_event_add(ud, VUDC_EVENT_ERROR_TCP);
+ if (ret >= 0)
+ return -EPIPE;
+ return ret;
+ }
+ usbip_header_correct_endian(&pdu, 0);
+
+ spin_lock_irq(&ud->lock);
+ ret = (ud->status == SDEV_ST_USED);
+ spin_unlock_irq(&ud->lock);
+ if (!ret) {
+ usbip_event_add(ud, VUDC_EVENT_ERROR_TCP);
+ return -EBUSY;
+ }
+
+ switch (pdu.base.command) {
+ case USBIP_CMD_UNLINK:
+ ret = v_recv_cmd_unlink(udc, &pdu);
+ break;
+ case USBIP_CMD_SUBMIT:
+ ret = v_recv_cmd_submit(udc, &pdu);
+ break;
+ default:
+ ret = -EPIPE;
+ pr_err("rx: unknown command");
+ break;
+ }
+ return ret;
+}
+
+int v_rx_loop(void *data)
+{
+ struct usbip_device *ud = data;
+ int ret = 0;
+
+ while (!kthread_should_stop()) {
+ if (usbip_event_happened(ud))
+ break;
+ ret = v_rx_pdu(ud);
+ if (ret < 0) {
+ pr_warn("v_rx exit with error %d", ret);
+ break;
+ }
+ }
+ return ret;
+}
diff --git a/drivers/usb/usbip/vudc_sysfs.c b/drivers/usb/usbip/vudc_sysfs.c
new file mode 100644
index 000000000..99397fa1e
--- /dev/null
+++ b/drivers/usb/usbip/vudc_sysfs.c
@@ -0,0 +1,229 @@
+/*
+ * Copyright (C) 2015 Karol Kosik <karo9@interia.eu>
+ * Copyright (C) 2015-2016 Samsung Electronics
+ * Igor Kotrasinski <i.kotrasinsk@samsung.com>
+ * Krzysztof Opasiak <k.opasiak@samsung.com>
+ *
+ * This program 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 program 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/ch9.h>
+#include <linux/sysfs.h>
+#include <linux/kthread.h>
+#include <linux/byteorder/generic.h>
+
+#include "usbip_common.h"
+#include "vudc.h"
+
+#include <net/sock.h>
+
+/* called with udc->lock held */
+int get_gadget_descs(struct vudc *udc)
+{
+ struct vrequest *usb_req;
+ struct vep *ep0 = to_vep(udc->gadget.ep0);
+ struct usb_device_descriptor *ddesc = &udc->dev_desc;
+ struct usb_ctrlrequest req;
+ int ret;
+
+ if (!udc || !udc->driver || !udc->pullup)
+ return -EINVAL;
+
+ req.bRequestType = USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_DEVICE;
+ req.bRequest = USB_REQ_GET_DESCRIPTOR;
+ req.wValue = cpu_to_le16(USB_DT_DEVICE << 8);
+ req.wIndex = cpu_to_le16(0);
+ req.wLength = cpu_to_le16(sizeof(*ddesc));
+
+ spin_unlock(&udc->lock);
+ ret = udc->driver->setup(&(udc->gadget), &req);
+ spin_lock(&udc->lock);
+ if (ret < 0)
+ goto out;
+
+ /* assuming request queue is empty; request is now on top */
+ usb_req = list_last_entry(&ep0->req_queue, struct vrequest, req_entry);
+ list_del(&usb_req->req_entry);
+
+ if (usb_req->req.length > sizeof(*ddesc)) {
+ ret = -EOVERFLOW;
+ goto giveback_req;
+ }
+
+ memcpy(ddesc, usb_req->req.buf, sizeof(*ddesc));
+ udc->desc_cached = 1;
+ ret = 0;
+giveback_req:
+ usb_req->req.status = 0;
+ usb_req->req.actual = usb_req->req.length;
+ usb_gadget_giveback_request(&(ep0->ep), &(usb_req->req));
+out:
+ return ret;
+}
+
+/*
+ * Exposes device descriptor from the gadget driver.
+ */
+static ssize_t dev_desc_read(struct file *file, struct kobject *kobj,
+ struct bin_attribute *attr, char *out,
+ loff_t off, size_t count)
+{
+ struct device *dev = kobj_to_dev(kobj);
+ struct vudc *udc = (struct vudc *)dev_get_drvdata(dev);
+ char *desc_ptr = (char *) &udc->dev_desc;
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&udc->lock, flags);
+ if (!udc->desc_cached) {
+ ret = -ENODEV;
+ goto unlock;
+ }
+
+ memcpy(out, desc_ptr + off, count);
+ ret = count;
+unlock:
+ spin_unlock_irqrestore(&udc->lock, flags);
+ return ret;
+}
+static BIN_ATTR_RO(dev_desc, sizeof(struct usb_device_descriptor));
+
+static ssize_t store_sockfd(struct device *dev, struct device_attribute *attr,
+ const char *in, size_t count)
+{
+ struct vudc *udc = (struct vudc *) dev_get_drvdata(dev);
+ int rv;
+ int sockfd = 0;
+ int err;
+ struct socket *socket;
+ unsigned long flags;
+ int ret;
+
+ rv = kstrtoint(in, 0, &sockfd);
+ if (rv != 0)
+ return -EINVAL;
+
+ spin_lock_irqsave(&udc->lock, flags);
+ /* Don't export what we don't have */
+ if (!udc || !udc->driver || !udc->pullup) {
+ dev_err(dev, "no device or gadget not bound");
+ ret = -ENODEV;
+ goto unlock;
+ }
+
+ if (sockfd != -1) {
+ if (udc->connected) {
+ dev_err(dev, "Device already connected");
+ ret = -EBUSY;
+ goto unlock;
+ }
+
+ spin_lock_irq(&udc->ud.lock);
+
+ if (udc->ud.status != SDEV_ST_AVAILABLE) {
+ ret = -EINVAL;
+ goto unlock_ud;
+ }
+
+ socket = sockfd_lookup(sockfd, &err);
+ if (!socket) {
+ dev_err(dev, "failed to lookup sock");
+ ret = -EINVAL;
+ goto unlock_ud;
+ }
+
+ udc->ud.tcp_socket = socket;
+
+ spin_unlock_irq(&udc->ud.lock);
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ udc->ud.tcp_rx = kthread_get_run(&v_rx_loop,
+ &udc->ud, "vudc_rx");
+ udc->ud.tcp_tx = kthread_get_run(&v_tx_loop,
+ &udc->ud, "vudc_tx");
+
+ spin_lock_irqsave(&udc->lock, flags);
+ spin_lock_irq(&udc->ud.lock);
+ udc->ud.status = SDEV_ST_USED;
+ spin_unlock_irq(&udc->ud.lock);
+
+ do_gettimeofday(&udc->start_time);
+ v_start_timer(udc);
+ udc->connected = 1;
+ } else {
+ if (!udc->connected) {
+ dev_err(dev, "Device not connected");
+ ret = -EINVAL;
+ goto unlock;
+ }
+
+ spin_lock_irq(&udc->ud.lock);
+ if (udc->ud.status != SDEV_ST_USED) {
+ ret = -EINVAL;
+ goto unlock_ud;
+ }
+ spin_unlock_irq(&udc->ud.lock);
+
+ usbip_event_add(&udc->ud, VUDC_EVENT_DOWN);
+ }
+
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return count;
+
+unlock_ud:
+ spin_unlock_irq(&udc->ud.lock);
+unlock:
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return ret;
+}
+static DEVICE_ATTR(usbip_sockfd, S_IWUSR, NULL, store_sockfd);
+
+static ssize_t usbip_status_show(struct device *dev,
+ struct device_attribute *attr, char *out)
+{
+ struct vudc *udc = (struct vudc *) dev_get_drvdata(dev);
+ int status;
+
+ if (!udc) {
+ dev_err(dev, "no device");
+ return -ENODEV;
+ }
+ spin_lock_irq(&udc->ud.lock);
+ status = udc->ud.status;
+ spin_unlock_irq(&udc->ud.lock);
+
+ return snprintf(out, PAGE_SIZE, "%d\n", status);
+}
+static DEVICE_ATTR_RO(usbip_status);
+
+static struct attribute *dev_attrs[] = {
+ &dev_attr_usbip_sockfd.attr,
+ &dev_attr_usbip_status.attr,
+ NULL,
+};
+
+static struct bin_attribute *dev_bin_attrs[] = {
+ &bin_attr_dev_desc,
+ NULL,
+};
+
+const struct attribute_group vudc_attr_group = {
+ .attrs = dev_attrs,
+ .bin_attrs = dev_bin_attrs,
+};
diff --git a/drivers/usb/usbip/vudc_transfer.c b/drivers/usb/usbip/vudc_transfer.c
new file mode 100644
index 000000000..aba6bd478
--- /dev/null
+++ b/drivers/usb/usbip/vudc_transfer.c
@@ -0,0 +1,506 @@
+/*
+ * Copyright (C) 2015 Karol Kosik <karo9@interia.eu>
+ * Copyright (C) 2015-2016 Samsung Electronics
+ * Igor Kotrasinski <i.kotrasinsk@samsung.com>
+ *
+ * Based on dummy_hcd.c, which is:
+ * Copyright (C) 2003 David Brownell
+ * Copyright (C) 2003-2005 Alan Stern
+ *
+ * This program 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 program 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/usb.h>
+#include <linux/timer.h>
+#include <linux/usb/ch9.h>
+
+#include "vudc.h"
+
+#define DEV_REQUEST (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
+#define DEV_INREQUEST (DEV_REQUEST | USB_DIR_IN)
+#define INTF_REQUEST (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
+#define INTF_INREQUEST (INTF_REQUEST | USB_DIR_IN)
+#define EP_REQUEST (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
+#define EP_INREQUEST (EP_REQUEST | USB_DIR_IN)
+
+static int get_frame_limit(enum usb_device_speed speed)
+{
+ switch (speed) {
+ case USB_SPEED_LOW:
+ return 8 /*bytes*/ * 12 /*packets*/;
+ case USB_SPEED_FULL:
+ return 64 /*bytes*/ * 19 /*packets*/;
+ case USB_SPEED_HIGH:
+ return 512 /*bytes*/ * 13 /*packets*/ * 8 /*uframes*/;
+ case USB_SPEED_SUPER:
+ /* Bus speed is 500000 bytes/ms, so use a little less */
+ return 490000;
+ default:
+ /* error */
+ return -1;
+ }
+
+}
+
+/*
+ * handle_control_request() - handles all control transfers
+ * @udc: pointer to vudc
+ * @urb: the urb request to handle
+ * @setup: pointer to the setup data for a USB device control
+ * request
+ * @status: pointer to request handling status
+ *
+ * Return 0 - if the request was handled
+ * 1 - if the request wasn't handles
+ * error code on error
+ *
+ * Adapted from drivers/usb/gadget/udc/dummy_hcd.c
+ */
+static int handle_control_request(struct vudc *udc, struct urb *urb,
+ struct usb_ctrlrequest *setup,
+ int *status)
+{
+ struct vep *ep2;
+ int ret_val = 1;
+ unsigned w_index;
+ unsigned w_value;
+
+ w_index = le16_to_cpu(setup->wIndex);
+ w_value = le16_to_cpu(setup->wValue);
+ switch (setup->bRequest) {
+ case USB_REQ_SET_ADDRESS:
+ if (setup->bRequestType != DEV_REQUEST)
+ break;
+ udc->address = w_value;
+ ret_val = 0;
+ *status = 0;
+ break;
+ case USB_REQ_SET_FEATURE:
+ if (setup->bRequestType == DEV_REQUEST) {
+ ret_val = 0;
+ switch (w_value) {
+ case USB_DEVICE_REMOTE_WAKEUP:
+ break;
+ case USB_DEVICE_B_HNP_ENABLE:
+ udc->gadget.b_hnp_enable = 1;
+ break;
+ case USB_DEVICE_A_HNP_SUPPORT:
+ udc->gadget.a_hnp_support = 1;
+ break;
+ case USB_DEVICE_A_ALT_HNP_SUPPORT:
+ udc->gadget.a_alt_hnp_support = 1;
+ break;
+ default:
+ ret_val = -EOPNOTSUPP;
+ }
+ if (ret_val == 0) {
+ udc->devstatus |= (1 << w_value);
+ *status = 0;
+ }
+ } else if (setup->bRequestType == EP_REQUEST) {
+ /* endpoint halt */
+ ep2 = vudc_find_endpoint(udc, w_index);
+ if (!ep2 || ep2->ep.name == udc->ep[0].ep.name) {
+ ret_val = -EOPNOTSUPP;
+ break;
+ }
+ ep2->halted = 1;
+ ret_val = 0;
+ *status = 0;
+ }
+ break;
+ case USB_REQ_CLEAR_FEATURE:
+ if (setup->bRequestType == DEV_REQUEST) {
+ ret_val = 0;
+ switch (w_value) {
+ case USB_DEVICE_REMOTE_WAKEUP:
+ w_value = USB_DEVICE_REMOTE_WAKEUP;
+ break;
+
+ case USB_DEVICE_U1_ENABLE:
+ case USB_DEVICE_U2_ENABLE:
+ case USB_DEVICE_LTM_ENABLE:
+ ret_val = -EOPNOTSUPP;
+ break;
+ default:
+ ret_val = -EOPNOTSUPP;
+ break;
+ }
+ if (ret_val == 0) {
+ udc->devstatus &= ~(1 << w_value);
+ *status = 0;
+ }
+ } else if (setup->bRequestType == EP_REQUEST) {
+ /* endpoint halt */
+ ep2 = vudc_find_endpoint(udc, w_index);
+ if (!ep2) {
+ ret_val = -EOPNOTSUPP;
+ break;
+ }
+ if (!ep2->wedged)
+ ep2->halted = 0;
+ ret_val = 0;
+ *status = 0;
+ }
+ break;
+ case USB_REQ_GET_STATUS:
+ if (setup->bRequestType == DEV_INREQUEST
+ || setup->bRequestType == INTF_INREQUEST
+ || setup->bRequestType == EP_INREQUEST) {
+ char *buf;
+ /*
+ * device: remote wakeup, selfpowered
+ * interface: nothing
+ * endpoint: halt
+ */
+ buf = (char *)urb->transfer_buffer;
+ if (urb->transfer_buffer_length > 0) {
+ if (setup->bRequestType == EP_INREQUEST) {
+ ep2 = vudc_find_endpoint(udc, w_index);
+ if (!ep2) {
+ ret_val = -EOPNOTSUPP;
+ break;
+ }
+ buf[0] = ep2->halted;
+ } else if (setup->bRequestType ==
+ DEV_INREQUEST) {
+ buf[0] = (u8)udc->devstatus;
+ } else
+ buf[0] = 0;
+ }
+ if (urb->transfer_buffer_length > 1)
+ buf[1] = 0;
+ urb->actual_length = min_t(u32, 2,
+ urb->transfer_buffer_length);
+ ret_val = 0;
+ *status = 0;
+ }
+ break;
+ }
+ return ret_val;
+}
+
+/* Adapted from dummy_hcd.c ; caller must hold lock */
+static int transfer(struct vudc *udc,
+ struct urb *urb, struct vep *ep, int limit)
+{
+ struct vrequest *req;
+ int sent = 0;
+top:
+ /* if there's no request queued, the device is NAKing; return */
+ list_for_each_entry(req, &ep->req_queue, req_entry) {
+ unsigned host_len, dev_len, len;
+ void *ubuf_pos, *rbuf_pos;
+ int is_short, to_host;
+ int rescan = 0;
+
+ /*
+ * 1..N packets of ep->ep.maxpacket each ... the last one
+ * may be short (including zero length).
+ *
+ * writer can send a zlp explicitly (length 0) or implicitly
+ * (length mod maxpacket zero, and 'zero' flag); they always
+ * terminate reads.
+ */
+ host_len = urb->transfer_buffer_length - urb->actual_length;
+ dev_len = req->req.length - req->req.actual;
+ len = min(host_len, dev_len);
+
+ to_host = usb_pipein(urb->pipe);
+ if (unlikely(len == 0))
+ is_short = 1;
+ else {
+ /* send multiple of maxpacket first, then remainder */
+ if (len >= ep->ep.maxpacket) {
+ is_short = 0;
+ if (len % ep->ep.maxpacket > 0)
+ rescan = 1;
+ len -= len % ep->ep.maxpacket;
+ } else {
+ is_short = 1;
+ }
+
+ ubuf_pos = urb->transfer_buffer + urb->actual_length;
+ rbuf_pos = req->req.buf + req->req.actual;
+
+ if (urb->pipe & USB_DIR_IN)
+ memcpy(ubuf_pos, rbuf_pos, len);
+ else
+ memcpy(rbuf_pos, ubuf_pos, len);
+
+ urb->actual_length += len;
+ req->req.actual += len;
+ sent += len;
+ }
+
+ /*
+ * short packets terminate, maybe with overflow/underflow.
+ * it's only really an error to write too much.
+ *
+ * partially filling a buffer optionally blocks queue advances
+ * (so completion handlers can clean up the queue) but we don't
+ * need to emulate such data-in-flight.
+ */
+ if (is_short) {
+ if (host_len == dev_len) {
+ req->req.status = 0;
+ urb->status = 0;
+ } else if (to_host) {
+ req->req.status = 0;
+ if (dev_len > host_len)
+ urb->status = -EOVERFLOW;
+ else
+ urb->status = 0;
+ } else {
+ urb->status = 0;
+ if (host_len > dev_len)
+ req->req.status = -EOVERFLOW;
+ else
+ req->req.status = 0;
+ }
+
+ /* many requests terminate without a short packet */
+ /* also check if we need to send zlp */
+ } else {
+ if (req->req.length == req->req.actual) {
+ if (req->req.zero && to_host)
+ rescan = 1;
+ else
+ req->req.status = 0;
+ }
+ if (urb->transfer_buffer_length == urb->actual_length) {
+ if (urb->transfer_flags & URB_ZERO_PACKET &&
+ !to_host)
+ rescan = 1;
+ else
+ urb->status = 0;
+ }
+ }
+
+ /* device side completion --> continuable */
+ if (req->req.status != -EINPROGRESS) {
+
+ list_del_init(&req->req_entry);
+ spin_unlock(&udc->lock);
+ usb_gadget_giveback_request(&ep->ep, &req->req);
+ spin_lock(&udc->lock);
+
+ /* requests might have been unlinked... */
+ rescan = 1;
+ }
+
+ /* host side completion --> terminate */
+ if (urb->status != -EINPROGRESS)
+ break;
+
+ /* rescan to continue with any other queued i/o */
+ if (rescan)
+ goto top;
+ }
+ return sent;
+}
+
+static void v_timer(unsigned long _vudc)
+{
+ struct vudc *udc = (struct vudc *) _vudc;
+ struct transfer_timer *timer = &udc->tr_timer;
+ struct urbp *urb_p, *tmp;
+ unsigned long flags;
+ struct usb_ep *_ep;
+ struct vep *ep;
+ int ret = 0;
+ int total, limit;
+
+ spin_lock_irqsave(&udc->lock, flags);
+
+ total = get_frame_limit(udc->gadget.speed);
+ if (total < 0) { /* unknown speed, or not set yet */
+ timer->state = VUDC_TR_IDLE;
+ spin_unlock_irqrestore(&udc->lock, flags);
+ return;
+ }
+ /* is it next frame now? */
+ if (time_after(jiffies, timer->frame_start + msecs_to_jiffies(1))) {
+ timer->frame_limit = total;
+ /* FIXME: how to make it accurate? */
+ timer->frame_start = jiffies;
+ } else {
+ total = timer->frame_limit;
+ }
+
+ list_for_each_entry(_ep, &udc->gadget.ep_list, ep_list) {
+ ep = to_vep(_ep);
+ ep->already_seen = 0;
+ }
+
+restart:
+ list_for_each_entry_safe(urb_p, tmp, &udc->urb_queue, urb_entry) {
+ struct urb *urb = urb_p->urb;
+
+ ep = urb_p->ep;
+ if (urb->unlinked)
+ goto return_urb;
+ if (timer->state != VUDC_TR_RUNNING)
+ continue;
+
+ if (!ep) {
+ urb->status = -EPROTO;
+ goto return_urb;
+ }
+
+ /* Used up bandwidth? */
+ if (total <= 0 && ep->type == USB_ENDPOINT_XFER_BULK)
+ continue;
+
+ if (ep->already_seen)
+ continue;
+ ep->already_seen = 1;
+ if (ep == &udc->ep[0] && urb_p->new) {
+ ep->setup_stage = 1;
+ urb_p->new = 0;
+ }
+ if (ep->halted && !ep->setup_stage) {
+ urb->status = -EPIPE;
+ goto return_urb;
+ }
+
+ if (ep == &udc->ep[0] && ep->setup_stage) {
+ /* TODO - flush any stale requests */
+ ep->setup_stage = 0;
+ ep->halted = 0;
+
+ ret = handle_control_request(udc, urb,
+ (struct usb_ctrlrequest *) urb->setup_packet,
+ (&urb->status));
+ if (ret > 0) {
+ spin_unlock(&udc->lock);
+ ret = udc->driver->setup(&udc->gadget,
+ (struct usb_ctrlrequest *)
+ urb->setup_packet);
+ spin_lock(&udc->lock);
+ }
+ if (ret >= 0) {
+ /* no delays (max 64kb data stage) */
+ limit = 64 * 1024;
+ goto treat_control_like_bulk;
+ } else {
+ urb->status = -EPIPE;
+ urb->actual_length = 0;
+ goto return_urb;
+ }
+ }
+
+ limit = total;
+ switch (ep->type) {
+ case USB_ENDPOINT_XFER_ISOC:
+ /* TODO: support */
+ urb->status = -EXDEV;
+ break;
+
+ case USB_ENDPOINT_XFER_INT:
+ /*
+ * TODO: figure out bandwidth guarantees
+ * for now, give unlimited bandwidth
+ */
+ limit += urb->transfer_buffer_length;
+ /* fallthrough */
+ default:
+treat_control_like_bulk:
+ total -= transfer(udc, urb, ep, limit);
+ }
+ if (urb->status == -EINPROGRESS)
+ continue;
+
+return_urb:
+ if (ep)
+ ep->already_seen = ep->setup_stage = 0;
+
+ spin_lock(&udc->lock_tx);
+ list_del(&urb_p->urb_entry);
+ if (!urb->unlinked) {
+ v_enqueue_ret_submit(udc, urb_p);
+ } else {
+ v_enqueue_ret_unlink(udc, urb_p->seqnum,
+ urb->unlinked);
+ free_urbp_and_urb(urb_p);
+ }
+ wake_up(&udc->tx_waitq);
+ spin_unlock(&udc->lock_tx);
+
+ goto restart;
+ }
+
+ /* TODO - also wait on empty usb_request queues? */
+ if (list_empty(&udc->urb_queue))
+ timer->state = VUDC_TR_IDLE;
+ else
+ mod_timer(&timer->timer,
+ timer->frame_start + msecs_to_jiffies(1));
+
+ spin_unlock_irqrestore(&udc->lock, flags);
+}
+
+/* All timer functions are run with udc->lock held */
+
+void v_init_timer(struct vudc *udc)
+{
+ struct transfer_timer *t = &udc->tr_timer;
+
+ setup_timer(&t->timer, v_timer, (unsigned long) udc);
+ t->state = VUDC_TR_STOPPED;
+}
+
+void v_start_timer(struct vudc *udc)
+{
+ struct transfer_timer *t = &udc->tr_timer;
+
+ dev_dbg(&udc->pdev->dev, "timer start");
+ switch (t->state) {
+ case VUDC_TR_RUNNING:
+ return;
+ case VUDC_TR_IDLE:
+ return v_kick_timer(udc, jiffies);
+ case VUDC_TR_STOPPED:
+ t->state = VUDC_TR_IDLE;
+ t->frame_start = jiffies;
+ t->frame_limit = get_frame_limit(udc->gadget.speed);
+ return v_kick_timer(udc, jiffies);
+ }
+}
+
+void v_kick_timer(struct vudc *udc, unsigned long time)
+{
+ struct transfer_timer *t = &udc->tr_timer;
+
+ dev_dbg(&udc->pdev->dev, "timer kick");
+ switch (t->state) {
+ case VUDC_TR_RUNNING:
+ return;
+ case VUDC_TR_IDLE:
+ t->state = VUDC_TR_RUNNING;
+ /* fallthrough */
+ case VUDC_TR_STOPPED:
+ /* we may want to kick timer to unqueue urbs */
+ mod_timer(&t->timer, time);
+ }
+}
+
+void v_stop_timer(struct vudc *udc)
+{
+ struct transfer_timer *t = &udc->tr_timer;
+
+ /* timer itself will take care of stopping */
+ dev_dbg(&udc->pdev->dev, "timer stop");
+ t->state = VUDC_TR_STOPPED;
+}
diff --git a/drivers/usb/usbip/vudc_tx.c b/drivers/usb/usbip/vudc_tx.c
new file mode 100644
index 000000000..234661782
--- /dev/null
+++ b/drivers/usb/usbip/vudc_tx.c
@@ -0,0 +1,289 @@
+/*
+ * Copyright (C) 2015 Karol Kosik <karo9@interia.eu>
+ * Copyright (C) 2015-2016 Samsung Electronics
+ * Igor Kotrasinski <i.kotrasinsk@samsung.com>
+ *
+ * This program 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 program 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <net/sock.h>
+#include <linux/list.h>
+#include <linux/kthread.h>
+
+#include "usbip_common.h"
+#include "vudc.h"
+
+static inline void setup_base_pdu(struct usbip_header_basic *base,
+ __u32 command, __u32 seqnum)
+{
+ base->command = command;
+ base->seqnum = seqnum;
+ base->devid = 0;
+ base->ep = 0;
+ base->direction = 0;
+}
+
+static void setup_ret_submit_pdu(struct usbip_header *rpdu, struct urbp *urb_p)
+{
+ setup_base_pdu(&rpdu->base, USBIP_RET_SUBMIT, urb_p->seqnum);
+ usbip_pack_pdu(rpdu, urb_p->urb, USBIP_RET_SUBMIT, 1);
+}
+
+static void setup_ret_unlink_pdu(struct usbip_header *rpdu,
+ struct v_unlink *unlink)
+{
+ setup_base_pdu(&rpdu->base, USBIP_RET_UNLINK, unlink->seqnum);
+ rpdu->u.ret_unlink.status = unlink->status;
+}
+
+static int v_send_ret_unlink(struct vudc *udc, struct v_unlink *unlink)
+{
+ struct msghdr msg;
+ struct kvec iov[1];
+ size_t txsize;
+
+ 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));
+
+ /* 1. setup usbip_header */
+ setup_ret_unlink_pdu(&pdu_header, unlink);
+ 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(udc->ud.tcp_socket, &msg, iov,
+ 1, txsize);
+ if (ret != txsize) {
+ usbip_event_add(&udc->ud, VUDC_EVENT_ERROR_TCP);
+ if (ret >= 0)
+ return -EPIPE;
+ return ret;
+ }
+ kfree(unlink);
+
+ return txsize;
+}
+
+static int v_send_ret_submit(struct vudc *udc, struct urbp *urb_p)
+{
+ struct urb *urb = urb_p->urb;
+ struct usbip_header pdu_header;
+ struct usbip_iso_packet_descriptor *iso_buffer = NULL;
+ struct kvec *iov = NULL;
+ int iovnum = 0;
+ int ret = 0;
+ size_t txsize;
+ struct msghdr msg;
+
+ txsize = 0;
+ memset(&pdu_header, 0, sizeof(pdu_header));
+ memset(&msg, 0, sizeof(msg));
+
+ if (urb_p->type == USB_ENDPOINT_XFER_ISOC)
+ iovnum = 2 + urb->number_of_packets;
+ else
+ iovnum = 2;
+
+ iov = kcalloc(iovnum, sizeof(*iov), GFP_KERNEL);
+ if (!iov) {
+ usbip_event_add(&udc->ud, VUDC_EVENT_ERROR_MALLOC);
+ ret = -ENOMEM;
+ goto out;
+ }
+ iovnum = 0;
+
+ /* 1. setup usbip_header */
+ setup_ret_submit_pdu(&pdu_header, urb_p);
+ usbip_dbg_stub_tx("setup txdata seqnum: %d urb: %p\n",
+ pdu_header.base.seqnum, urb);
+ usbip_header_correct_endian(&pdu_header, 1);
+
+ iov[iovnum].iov_base = &pdu_header;
+ iov[iovnum].iov_len = sizeof(pdu_header);
+ iovnum++;
+ txsize += sizeof(pdu_header);
+
+ /* 2. setup transfer buffer */
+ if (urb_p->type != USB_ENDPOINT_XFER_ISOC &&
+ usb_pipein(urb->pipe) && urb->actual_length > 0) {
+ iov[iovnum].iov_base = urb->transfer_buffer;
+ iov[iovnum].iov_len = urb->actual_length;
+ iovnum++;
+ txsize += urb->actual_length;
+ } else if (urb_p->type == USB_ENDPOINT_XFER_ISOC &&
+ usb_pipein(urb->pipe)) {
+ /* FIXME - copypasted from stub_tx, refactor */
+ int i;
+
+ for (i = 0; i < urb->number_of_packets; i++) {
+ iov[iovnum].iov_base = urb->transfer_buffer +
+ urb->iso_frame_desc[i].offset;
+ iov[iovnum].iov_len =
+ urb->iso_frame_desc[i].actual_length;
+ iovnum++;
+ txsize += urb->iso_frame_desc[i].actual_length;
+ }
+
+ if (txsize != sizeof(pdu_header) + urb->actual_length) {
+ usbip_event_add(&udc->ud, VUDC_EVENT_ERROR_TCP);
+ ret = -EPIPE;
+ goto out;
+ }
+ }
+ /* else - no buffer to send */
+
+ /* 3. setup iso_packet_descriptor */
+ if (urb_p->type == USB_ENDPOINT_XFER_ISOC) {
+ ssize_t len = 0;
+
+ iso_buffer = usbip_alloc_iso_desc_pdu(urb, &len);
+ if (!iso_buffer) {
+ usbip_event_add(&udc->ud,
+ VUDC_EVENT_ERROR_MALLOC);
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ iov[iovnum].iov_base = iso_buffer;
+ iov[iovnum].iov_len = len;
+ txsize += len;
+ iovnum++;
+ }
+
+ ret = kernel_sendmsg(udc->ud.tcp_socket, &msg,
+ iov, iovnum, txsize);
+ if (ret != txsize) {
+ usbip_event_add(&udc->ud, VUDC_EVENT_ERROR_TCP);
+ if (ret >= 0)
+ ret = -EPIPE;
+ goto out;
+ }
+
+out:
+ kfree(iov);
+ kfree(iso_buffer);
+ free_urbp_and_urb(urb_p);
+ if (ret < 0)
+ return ret;
+ return txsize;
+}
+
+static int v_send_ret(struct vudc *udc)
+{
+ unsigned long flags;
+ struct tx_item *txi;
+ size_t total_size = 0;
+ int ret = 0;
+
+ spin_lock_irqsave(&udc->lock_tx, flags);
+ while (!list_empty(&udc->tx_queue)) {
+ txi = list_first_entry(&udc->tx_queue, struct tx_item,
+ tx_entry);
+ list_del(&txi->tx_entry);
+ spin_unlock_irqrestore(&udc->lock_tx, flags);
+
+ switch (txi->type) {
+ case TX_SUBMIT:
+ ret = v_send_ret_submit(udc, txi->s);
+ break;
+ case TX_UNLINK:
+ ret = v_send_ret_unlink(udc, txi->u);
+ break;
+ }
+ kfree(txi);
+
+ if (ret < 0)
+ return ret;
+
+ total_size += ret;
+
+ spin_lock_irqsave(&udc->lock_tx, flags);
+ }
+
+ spin_unlock_irqrestore(&udc->lock_tx, flags);
+ return total_size;
+}
+
+
+int v_tx_loop(void *data)
+{
+ struct usbip_device *ud = (struct usbip_device *) data;
+ struct vudc *udc = container_of(ud, struct vudc, ud);
+ int ret;
+
+ while (!kthread_should_stop()) {
+ if (usbip_event_happened(&udc->ud))
+ break;
+ ret = v_send_ret(udc);
+ if (ret < 0) {
+ pr_warn("v_tx exit with error %d", ret);
+ break;
+ }
+ wait_event_interruptible(udc->tx_waitq,
+ (!list_empty(&udc->tx_queue) ||
+ kthread_should_stop()));
+ }
+
+ return 0;
+}
+
+/* called with spinlocks held */
+void v_enqueue_ret_unlink(struct vudc *udc, __u32 seqnum, __u32 status)
+{
+ struct tx_item *txi;
+ struct v_unlink *unlink;
+
+ txi = kzalloc(sizeof(*txi), GFP_ATOMIC);
+ if (!txi) {
+ usbip_event_add(&udc->ud, VDEV_EVENT_ERROR_MALLOC);
+ return;
+ }
+ unlink = kzalloc(sizeof(*unlink), GFP_ATOMIC);
+ if (!unlink) {
+ kfree(txi);
+ usbip_event_add(&udc->ud, VDEV_EVENT_ERROR_MALLOC);
+ return;
+ }
+
+ unlink->seqnum = seqnum;
+ unlink->status = status;
+ txi->type = TX_UNLINK;
+ txi->u = unlink;
+
+ list_add_tail(&txi->tx_entry, &udc->tx_queue);
+}
+
+/* called with spinlocks held */
+void v_enqueue_ret_submit(struct vudc *udc, struct urbp *urb_p)
+{
+ struct tx_item *txi;
+
+ txi = kzalloc(sizeof(*txi), GFP_ATOMIC);
+ if (!txi) {
+ usbip_event_add(&udc->ud, VDEV_EVENT_ERROR_MALLOC);
+ return;
+ }
+
+ txi->type = TX_SUBMIT;
+ txi->s = urb_p;
+
+ list_add_tail(&txi->tx_entry, &udc->tx_queue);
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-04 16:52:54 +0000