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Subject[patch 01/03] USB: USB/IP: add common functions needed
From: Takahiro Hirofuchi <hirofuchi@users.sourceforge.net>

This adds the common functions needed by both the host and client side
of the USB/IP code.

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/usb/Kconfig | 2
drivers/usb/Makefile | 2
drivers/usb/ip/Kconfig | 14
drivers/usb/ip/Makefile | 6
drivers/usb/ip/usbip_common.c | 997 ++++++++++++++++++++++++++++++++++++++++++
drivers/usb/ip/usbip_common.h | 406 +++++++++++++++++
drivers/usb/ip/usbip_event.c | 141 +++++
7 files changed, 1568 insertions(+)
--- /dev/null
+++ b/drivers/usb/ip/Kconfig
@@ -0,0 +1,14 @@
+config USB_IP_COMMON
+ tristate "USB IP support (EXPERIMENTAL)"
+ depends on USB && EXPERIMENTAL
+ default N
+ ---help---
+ This enables pushing USB packets over IP to allow remote
+ machines access to USB devices directly. For more details,
+ and links to the userspace utility programs to let this work
+ properly, see http://usbip.naist.jp/
+
+ To compile this driver as a module, choose M here: the
+ module will be called usbip_common_mod.
+
+ If unsure, say N.
--- /dev/null
+++ b/drivers/usb/ip/Makefile
@@ -0,0 +1,6 @@
+obj-$(CONFIG_USB_IP_COMMON) += usbip_common_mod.o
+usbip_common_mod-objs := usbip_common.o usbip_event.o
+
+ifeq ($(CONFIG_USB_DEBUG),y)
+ EXTRA_CFLAGS += -DDEBUG
+endif
--- /dev/null
+++ b/drivers/usb/ip/usbip_common.c
@@ -0,0 +1,997 @@
+/*
+ * 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/kernel.h>
+#include <linux/file.h>
+#include <linux/tcp.h>
+#include <linux/in.h>
+#include "usbip_common.h"
+
+/* version information */
+#define DRIVER_VERSION "1.0"
+#define DRIVER_AUTHOR "Takahiro Hirofuchi <hirofuchi _at_ users.sourceforge.net>"
+#define DRIVER_DESC "usbip common driver"
+
+/*-------------------------------------------------------------------------*/
+/* debug routines */
+
+#ifdef CONFIG_USB_DEBUG
+unsigned long usbip_debug_flag = 0xffffffff;
+#else
+unsigned long usbip_debug_flag;
+#endif
+EXPORT_SYMBOL(usbip_debug_flag);
+
+
+/* FIXME */
+struct device_attribute dev_attr_usbip_debug;
+EXPORT_SYMBOL(dev_attr_usbip_debug);
+
+
+static ssize_t show_flag(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%lx\n", usbip_debug_flag);
+}
+
+static ssize_t store_flag(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ unsigned long flag;
+
+ sscanf(buf, "%lx", &flag);
+ usbip_debug_flag = flag;
+
+ return count;
+}
+DEVICE_ATTR(usbip_debug, (S_IRUGO | S_IWUSR), show_flag, store_flag);
+
+static void usbip_dump_buffer(char *buff, int bufflen)
+{
+ int i;
+
+ if (bufflen > 128) {
+ for (i = 0; i < 128; i++) {
+ if (i%24 == 0)
+ printk(" ");
+ printk("%02x ", (unsigned char) buff[i]);
+ if (i%4 == 3)
+ printk("| ");
+ if (i%24 == 23)
+ printk("\n");
+ }
+ printk("... (%d byte)\n", bufflen);
+ return;
+ }
+
+ for (i = 0; i < bufflen; i++) {
+ if (i%24 == 0)
+ printk(" ");
+ printk("%02x ", (unsigned char) buff[i]);
+ if (i%4 == 3)
+ printk("| ");
+ if (i%24 == 23)
+ printk("\n");
+ }
+ printk("\n");
+
+}
+
+static void usbip_dump_pipe(unsigned int p)
+{
+ unsigned char type = usb_pipetype(p);
+ unsigned char ep = usb_pipeendpoint(p);
+ unsigned char dev = usb_pipedevice(p);
+ unsigned char dir = usb_pipein(p);
+
+ printk("dev(%d) ", dev);
+ printk("ep(%d) ", ep);
+ printk("%s ", dir ? "IN" : "OUT");
+
+ switch (type) {
+ case PIPE_ISOCHRONOUS:
+ printk("%s ", "ISO");
+ break;
+ case PIPE_INTERRUPT:
+ printk("%s ", "INT");
+ break;
+ case PIPE_CONTROL:
+ printk("%s ", "CTL");
+ break;
+ case PIPE_BULK:
+ printk("%s ", "BLK");
+ break;
+ default:
+ printk("ERR");
+ }
+
+ printk("\n");
+
+}
+
+static void usbip_dump_usb_device(struct usb_device *udev)
+{
+ struct device *dev = &udev->dev;
+ int i;
+
+ dev_dbg(dev, " devnum(%d) devpath(%s)",
+ udev->devnum, udev->devpath);
+
+ switch (udev->speed) {
+ case USB_SPEED_HIGH:
+ printk(" SPD_HIGH");
+ break;
+ case USB_SPEED_FULL:
+ printk(" SPD_FULL");
+ break;
+ case USB_SPEED_LOW:
+ printk(" SPD_LOW");
+ break;
+ case USB_SPEED_UNKNOWN:
+ printk(" SPD_UNKNOWN");
+ break;
+ default:
+ printk(" SPD_ERROR");
+ }
+
+ printk(" tt %p, ttport %d", udev->tt, udev->ttport);
+ printk("\n");
+
+ dev_dbg(dev, " ");
+ for (i = 0; i < 16; i++)
+ printk(" %2u", i);
+ printk("\n");
+
+ dev_dbg(dev, " toggle0(IN) :");
+ for (i = 0; i < 16; i++)
+ printk(" %2u", (udev->toggle[0] & (1 << i)) ? 1 : 0);
+ printk("\n");
+
+ dev_dbg(dev, " toggle1(OUT):");
+ for (i = 0; i < 16; i++)
+ printk(" %2u", (udev->toggle[1] & (1 << i)) ? 1 : 0);
+ printk("\n");
+
+
+ dev_dbg(dev, " epmaxp_in :");
+ for (i = 0; i < 16; i++) {
+ if (udev->ep_in[i])
+ printk(" %2u",
+ le16_to_cpu(udev->ep_in[i]->desc.wMaxPacketSize));
+ }
+ printk("\n");
+
+ dev_dbg(dev, " epmaxp_out :");
+ for (i = 0; i < 16; i++) {
+ if (udev->ep_out[i])
+ printk(" %2u",
+ le16_to_cpu(udev->ep_out[i]->desc.wMaxPacketSize));
+ }
+ printk("\n");
+
+ dev_dbg(dev, "parent %p, bus %p\n", udev->parent, udev->bus);
+
+ dev_dbg(dev, "descriptor %p, config %p, actconfig %p, "
+ "rawdescriptors %p\n", &udev->descriptor, udev->config,
+ udev->actconfig, udev->rawdescriptors);
+
+ dev_dbg(dev, "have_langid %d, string_langid %d\n",
+ udev->have_langid, udev->string_langid);
+
+ dev_dbg(dev, "maxchild %d, children %p\n",
+ udev->maxchild, udev->children);
+}
+
+static void usbip_dump_request_type(__u8 rt)
+{
+ switch (rt & USB_RECIP_MASK) {
+ case USB_RECIP_DEVICE:
+ printk("DEVICE");
+ break;
+ case USB_RECIP_INTERFACE:
+ printk("INTERF");
+ break;
+ case USB_RECIP_ENDPOINT:
+ printk("ENDPOI");
+ break;
+ case USB_RECIP_OTHER:
+ printk("OTHER ");
+ break;
+ default:
+ printk("------");
+ }
+}
+
+static void usbip_dump_usb_ctrlrequest(struct usb_ctrlrequest *cmd)
+{
+ if (!cmd) {
+ printk(" %s : null pointer\n", __FUNCTION__);
+ return;
+ }
+
+ printk(" ");
+ printk("bRequestType(%02X) ", cmd->bRequestType);
+ printk("bRequest(%02X) " , cmd->bRequest);
+ printk("wValue(%04X) ", cmd->wValue);
+ printk("wIndex(%04X) ", cmd->wIndex);
+ printk("wLength(%04X) ", cmd->wLength);
+
+ printk("\n ");
+
+ if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
+ printk("STANDARD ");
+ switch (cmd->bRequest) {
+ case USB_REQ_GET_STATUS:
+ printk("GET_STATUS");
+ break;
+ case USB_REQ_CLEAR_FEATURE:
+ printk("CLEAR_FEAT");
+ break;
+ case USB_REQ_SET_FEATURE:
+ printk("SET_FEAT ");
+ break;
+ case USB_REQ_SET_ADDRESS:
+ printk("SET_ADDRRS");
+ break;
+ case USB_REQ_GET_DESCRIPTOR:
+ printk("GET_DESCRI");
+ break;
+ case USB_REQ_SET_DESCRIPTOR:
+ printk("SET_DESCRI");
+ break;
+ case USB_REQ_GET_CONFIGURATION:
+ printk("GET_CONFIG");
+ break;
+ case USB_REQ_SET_CONFIGURATION:
+ printk("SET_CONFIG");
+ break;
+ case USB_REQ_GET_INTERFACE:
+ printk("GET_INTERF");
+ break;
+ case USB_REQ_SET_INTERFACE:
+ printk("SET_INTERF");
+ break;
+ case USB_REQ_SYNCH_FRAME:
+ printk("SYNC_FRAME");
+ break;
+ default:
+ printk("REQ(%02X) ", cmd->bRequest);
+ }
+
+ printk(" ");
+ usbip_dump_request_type(cmd->bRequestType);
+
+ } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS)
+ printk("CLASS ");
+
+ else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_VENDOR)
+ printk("VENDOR ");
+
+ else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_RESERVED)
+ printk("RESERVED");
+
+ printk("\n");
+}
+
+void usbip_dump_urb(struct urb *urb)
+{
+ struct device *dev;
+
+ if (!urb) {
+ printk(KERN_DEBUG KBUILD_MODNAME
+ ":%s: urb: null pointer!!\n", __func__);
+ return;
+ }
+
+ if (!urb->dev) {
+ printk(KERN_DEBUG KBUILD_MODNAME
+ ":%s: urb->dev: null pointer!!\n", __func__);
+ return;
+ }
+ dev = &urb->dev->dev;
+
+ dev_dbg(dev, " urb :%p\n", urb);
+ dev_dbg(dev, " dev :%p\n", urb->dev);
+
+ usbip_dump_usb_device(urb->dev);
+
+ dev_dbg(dev, " pipe :%08x ", urb->pipe);
+
+ usbip_dump_pipe(urb->pipe);
+
+ dev_dbg(dev, " status :%d\n", urb->status);
+ dev_dbg(dev, " transfer_flags :%08X\n", urb->transfer_flags);
+ dev_dbg(dev, " transfer_buffer :%p\n", urb->transfer_buffer);
+ dev_dbg(dev, " transfer_buffer_length:%d\n", urb->transfer_buffer_length);
+ dev_dbg(dev, " actual_length :%d\n", urb->actual_length);
+ dev_dbg(dev, " setup_packet :%p\n", urb->setup_packet);
+
+ if (urb->setup_packet && usb_pipetype(urb->pipe) == PIPE_CONTROL)
+ usbip_dump_usb_ctrlrequest(
+ (struct usb_ctrlrequest *)urb->setup_packet);
+
+ dev_dbg(dev, " start_frame :%d\n", urb->start_frame);
+ dev_dbg(dev, " number_of_packets :%d\n", urb->number_of_packets);
+ dev_dbg(dev, " interval :%d\n", urb->interval);
+ dev_dbg(dev, " error_count :%d\n", urb->error_count);
+ dev_dbg(dev, " context :%p\n", urb->context);
+ dev_dbg(dev, " complete :%p\n", urb->complete);
+}
+EXPORT_SYMBOL(usbip_dump_urb);
+
+void usbip_dump_header(struct usbip_header *pdu)
+{
+ udbg("BASE: cmd %u seq %u devid %u dir %u ep %u\n",
+ pdu->base.command,
+ pdu->base.seqnum,
+ pdu->base.devid,
+ pdu->base.direction,
+ pdu->base.ep);
+
+ switch (pdu->base.command) {
+ case USBIP_CMD_SUBMIT:
+ udbg("CMD_SUBMIT: x_flags %u x_len %u sf %u #p %u iv %u\n",
+ pdu->u.cmd_submit.transfer_flags,
+ pdu->u.cmd_submit.transfer_buffer_length,
+ pdu->u.cmd_submit.start_frame,
+ pdu->u.cmd_submit.number_of_packets,
+ pdu->u.cmd_submit.interval);
+ break;
+ case USBIP_CMD_UNLINK:
+ udbg("CMD_UNLINK: seq %u\n", pdu->u.cmd_unlink.seqnum);
+ break;
+ case USBIP_RET_SUBMIT:
+ udbg("RET_SUBMIT: st %d al %u sf %d ec %d\n",
+ pdu->u.ret_submit.status,
+ pdu->u.ret_submit.actual_length,
+ pdu->u.ret_submit.start_frame,
+ pdu->u.ret_submit.error_count);
+ case USBIP_RET_UNLINK:
+ udbg("RET_UNLINK: status %d\n", pdu->u.ret_unlink.status);
+ break;
+ default:
+ /* NOT REACHED */
+ udbg("UNKNOWN\n");
+ }
+}
+EXPORT_SYMBOL(usbip_dump_header);
+
+
+/*-------------------------------------------------------------------------*/
+/* thread routines */
+
+int usbip_thread(void *param)
+{
+ struct usbip_task *ut = param;
+
+ if (!ut)
+ return -EINVAL;
+
+ lock_kernel();
+ daemonize(ut->name);
+ allow_signal(SIGKILL);
+ ut->thread = current;
+ unlock_kernel();
+
+ /* srv.rb must wait for rx_thread starting */
+ complete(&ut->thread_done);
+
+ /* start of while loop */
+ ut->loop_ops(ut);
+
+ /* end of loop */
+ ut->thread = NULL;
+
+ complete_and_exit(&ut->thread_done, 0);
+}
+
+void usbip_start_threads(struct usbip_device *ud)
+{
+ /*
+ * threads are invoked per one device (per one connection).
+ */
+ kernel_thread(usbip_thread, (void *)&ud->tcp_rx, 0);
+ kernel_thread(usbip_thread, (void *)&ud->tcp_tx, 0);
+
+ /* confirm threads are starting */
+ wait_for_completion(&ud->tcp_rx.thread_done);
+ wait_for_completion(&ud->tcp_tx.thread_done);
+}
+EXPORT_SYMBOL(usbip_start_threads);
+
+void usbip_stop_threads(struct usbip_device *ud)
+{
+ /* kill threads related to this sdev, if v.c. exists */
+ if (ud->tcp_rx.thread != NULL) {
+ send_sig(SIGKILL, ud->tcp_rx.thread, 1);
+ wait_for_completion(&ud->tcp_rx.thread_done);
+ udbg("rx_thread for ud %p has finished\n", ud);
+ }
+
+ if (ud->tcp_tx.thread != NULL) {
+ send_sig(SIGKILL, ud->tcp_tx.thread, 1);
+ wait_for_completion(&ud->tcp_tx.thread_done);
+ udbg("tx_thread for ud %p has finished\n", ud);
+ }
+}
+EXPORT_SYMBOL(usbip_stop_threads);
+
+void usbip_task_init(struct usbip_task *ut, char *name,
+ void (*loop_ops)(struct usbip_task *))
+{
+ ut->thread = NULL;
+ init_completion(&ut->thread_done);
+ ut->name = name;
+ ut->loop_ops = loop_ops;
+}
+EXPORT_SYMBOL(usbip_task_init);
+
+
+/*-------------------------------------------------------------------------*/
+/* socket routines */
+
+ /* Send/receive messages over TCP/IP. I refer drivers/block/nbd.c */
+int usbip_xmit(int send, struct socket *sock, char *buf,
+ int size, int msg_flags)
+{
+ int result;
+ struct msghdr msg;
+ struct kvec iov;
+ int total = 0;
+
+ /* for blocks of if (dbg_flag_xmit) */
+ char *bp = buf;
+ int osize = size;
+
+ dbg_xmit("enter\n");
+
+ if (!sock || !buf || !size) {
+ printk(KERN_ERR "%s: invalid arg, sock %p buff %p size %d\n",
+ __func__, sock, buf, size);
+ return -EINVAL;
+ }
+
+
+ if (dbg_flag_xmit) {
+ if (send) {
+ if (!in_interrupt())
+ printk(KERN_DEBUG "%-10s:", current->comm);
+ else
+ printk(KERN_DEBUG "interupt :");
+
+ printk("%s: sending... , sock %p, buf %p, "
+ "size %d, msg_flags %d\n", __func__,
+ sock, buf, size, msg_flags);
+ usbip_dump_buffer(buf, size);
+ }
+ }
+
+
+ do {
+ sock->sk->sk_allocation = GFP_NOIO;
+ iov.iov_base = buf;
+ iov.iov_len = size;
+ msg.msg_name = NULL;
+ msg.msg_namelen = 0;
+ msg.msg_control = NULL;
+ msg.msg_controllen = 0;
+ msg.msg_namelen = 0;
+ msg.msg_flags = msg_flags | MSG_NOSIGNAL;
+
+ if (send)
+ result = kernel_sendmsg(sock, &msg, &iov, 1, size);
+ else
+ result = kernel_recvmsg(sock, &msg, &iov, 1, size,
+ MSG_WAITALL);
+
+ if (result <= 0) {
+ udbg("usbip_xmit: %s sock %p buf %p size %u ret %d"
+ " total %d\n",
+ send ? "send" : "receive", sock, buf,
+ size, result, total);
+ goto err;
+ }
+
+ size -= result;
+ buf += result;
+ total += result;
+
+ } while (size > 0);
+
+
+ if (dbg_flag_xmit) {
+ if (!send) {
+ if (!in_interrupt())
+ printk(KERN_DEBUG "%-10s:", current->comm);
+ else
+ printk(KERN_DEBUG "interupt :");
+
+ printk("usbip_xmit: receiving....\n");
+ usbip_dump_buffer(bp, osize);
+ printk("usbip_xmit: received, osize %d ret %d size %d "
+ "total %d\n", osize, result, size,
+ total);
+ }
+
+ if (send)
+ printk("usbip_xmit: send, total %d\n", total);
+ }
+
+ return total;
+
+err:
+ return result;
+}
+EXPORT_SYMBOL(usbip_xmit);
+
+
+/* now a usrland utility should set options. */
+#if 0
+int setquickack(struct socket *socket)
+{
+ mm_segment_t oldfs;
+ int val = 1;
+ int ret;
+
+ oldfs = get_fs();
+ set_fs(get_ds());
+ ret = socket->ops->setsockopt(socket, SOL_TCP, TCP_QUICKACK,
+ (char __user *) &val, sizeof(ret));
+ set_fs(oldfs);
+
+ return ret;
+}
+
+int setnodelay(struct socket *socket)
+{
+ mm_segment_t oldfs;
+ int val = 1;
+ int ret;
+
+ oldfs = get_fs();
+ set_fs(get_ds());
+ ret = socket->ops->setsockopt(socket, SOL_TCP, TCP_NODELAY,
+ (char __user *) &val, sizeof(ret));
+ set_fs(oldfs);
+
+ return ret;
+}
+
+int setkeepalive(struct socket *socket)
+{
+ mm_segment_t oldfs;
+ int val = 1;
+ int ret;
+
+ oldfs = get_fs();
+ set_fs(get_ds());
+ ret = socket->ops->setsockopt(socket, SOL_SOCKET, SO_KEEPALIVE,
+ (char __user *) &val, sizeof(ret));
+ set_fs(oldfs);
+
+ return ret;
+}
+
+void setreuse(struct socket *socket)
+{
+ socket->sk->sk_reuse = 1;
+}
+#endif
+
+struct socket *sockfd_to_socket(unsigned int sockfd)
+{
+ struct socket *socket;
+ struct file *file;
+ struct inode *inode;
+
+ file = fget(sockfd);
+ if (!file) {
+ printk(KERN_ERR "%s: invalid sockfd\n", __func__);
+ return NULL;
+ }
+
+ inode = file->f_dentry->d_inode;
+
+ if (!inode || !S_ISSOCK(inode->i_mode))
+ return NULL;
+
+ socket = SOCKET_I(inode);
+
+ return socket;
+}
+EXPORT_SYMBOL(sockfd_to_socket);
+
+
+
+/*-------------------------------------------------------------------------*/
+/* pdu routines */
+
+/* there may be more cases to tweak the flags. */
+static unsigned int tweak_transfer_flags(unsigned int flags)
+{
+
+ if (flags & URB_NO_TRANSFER_DMA_MAP)
+ /*
+ * vhci_hcd does not provide DMA-mapped I/O. The upper
+ * driver does not need to set this flag. The remote
+ * usbip.ko does not still perform DMA-mapped I/O for
+ * DMA-caplable host controllers. So, clear this flag.
+ */
+ flags &= ~URB_NO_TRANSFER_DMA_MAP;
+
+ if (flags & URB_NO_SETUP_DMA_MAP)
+ flags &= ~URB_NO_SETUP_DMA_MAP;
+
+ return flags;
+}
+
+static void usbip_pack_cmd_submit(struct usbip_header *pdu, struct urb *urb,
+ int pack)
+{
+ struct usbip_header_cmd_submit *spdu = &pdu->u.cmd_submit;
+
+ /*
+ * Some members are not still implemented in usbip. I hope this issue
+ * will be discussed when usbip is ported to other operating systems.
+ */
+ if (pack) {
+ /* vhci_tx.c */
+ spdu->transfer_flags =
+ tweak_transfer_flags(urb->transfer_flags);
+ spdu->transfer_buffer_length = urb->transfer_buffer_length;
+ spdu->start_frame = urb->start_frame;
+ spdu->number_of_packets = urb->number_of_packets;
+ spdu->interval = urb->interval;
+ } else {
+ /* stub_rx.c */
+ urb->transfer_flags = spdu->transfer_flags;
+
+ urb->transfer_buffer_length = spdu->transfer_buffer_length;
+ urb->start_frame = spdu->start_frame;
+ urb->number_of_packets = spdu->number_of_packets;
+ urb->interval = spdu->interval;
+ }
+}
+
+static void usbip_pack_ret_submit(struct usbip_header *pdu, struct urb *urb,
+ int pack)
+{
+ struct usbip_header_ret_submit *rpdu = &pdu->u.ret_submit;
+
+ if (pack) {
+ /* stub_tx.c */
+
+ rpdu->status = urb->status;
+ rpdu->actual_length = urb->actual_length;
+ rpdu->start_frame = urb->start_frame;
+ rpdu->error_count = urb->error_count;
+ } else {
+ /* vhci_rx.c */
+
+ urb->status = rpdu->status;
+ urb->actual_length = rpdu->actual_length;
+ urb->start_frame = rpdu->start_frame;
+ urb->error_count = rpdu->error_count;
+ }
+}
+
+
+void usbip_pack_pdu(struct usbip_header *pdu, struct urb *urb, int cmd,
+ int pack)
+{
+ switch (cmd) {
+ case USBIP_CMD_SUBMIT:
+ usbip_pack_cmd_submit(pdu, urb, pack);
+ break;
+ case USBIP_RET_SUBMIT:
+ usbip_pack_ret_submit(pdu, urb, pack);
+ break;
+ default:
+ err("unknown command");
+ /* NOTREACHED */
+ /* BUG(); */
+ }
+}
+EXPORT_SYMBOL(usbip_pack_pdu);
+
+
+static void correct_endian_basic(struct usbip_header_basic *base, int send)
+{
+ if (send) {
+ base->command = cpu_to_be32(base->command);
+ base->seqnum = cpu_to_be32(base->seqnum);
+ base->devid = cpu_to_be32(base->devid);
+ base->direction = cpu_to_be32(base->direction);
+ base->ep = cpu_to_be32(base->ep);
+ } else {
+ base->command = be32_to_cpu(base->command);
+ base->seqnum = be32_to_cpu(base->seqnum);
+ base->devid = be32_to_cpu(base->devid);
+ base->direction = be32_to_cpu(base->direction);
+ base->ep = be32_to_cpu(base->ep);
+ }
+}
+
+static void correct_endian_cmd_submit(struct usbip_header_cmd_submit *pdu,
+ int send)
+{
+ if (send) {
+ pdu->transfer_flags = cpu_to_be32(pdu->transfer_flags);
+
+ cpu_to_be32s(&pdu->transfer_buffer_length);
+ cpu_to_be32s(&pdu->start_frame);
+ cpu_to_be32s(&pdu->number_of_packets);
+ cpu_to_be32s(&pdu->interval);
+ } else {
+ pdu->transfer_flags = be32_to_cpu(pdu->transfer_flags);
+
+ be32_to_cpus(&pdu->transfer_buffer_length);
+ be32_to_cpus(&pdu->start_frame);
+ be32_to_cpus(&pdu->number_of_packets);
+ be32_to_cpus(&pdu->interval);
+ }
+}
+
+static void correct_endian_ret_submit(struct usbip_header_ret_submit *pdu,
+ int send)
+{
+ if (send) {
+ cpu_to_be32s(&pdu->status);
+ cpu_to_be32s(&pdu->actual_length);
+ cpu_to_be32s(&pdu->start_frame);
+ cpu_to_be32s(&pdu->error_count);
+ } else {
+ be32_to_cpus(&pdu->status);
+ be32_to_cpus(&pdu->actual_length);
+ be32_to_cpus(&pdu->start_frame);
+ be32_to_cpus(&pdu->error_count);
+ }
+}
+
+static void correct_endian_cmd_unlink(struct usbip_header_cmd_unlink *pdu,
+ int send)
+{
+ if (send)
+ pdu->seqnum = cpu_to_be32(pdu->seqnum);
+ else
+ pdu->seqnum = be32_to_cpu(pdu->seqnum);
+}
+
+static void correct_endian_ret_unlink(struct usbip_header_ret_unlink *pdu,
+ int send)
+{
+ if (send)
+ cpu_to_be32s(&pdu->status);
+ else
+ be32_to_cpus(&pdu->status);
+}
+
+void usbip_header_correct_endian(struct usbip_header *pdu, int send)
+{
+ __u32 cmd = 0;
+
+ if (send)
+ cmd = pdu->base.command;
+
+ correct_endian_basic(&pdu->base, send);
+
+ if (!send)
+ cmd = pdu->base.command;
+
+ switch (cmd) {
+ case USBIP_CMD_SUBMIT:
+ correct_endian_cmd_submit(&pdu->u.cmd_submit, send);
+ break;
+ case USBIP_RET_SUBMIT:
+ correct_endian_ret_submit(&pdu->u.ret_submit, send);
+ break;
+ case USBIP_CMD_UNLINK:
+ correct_endian_cmd_unlink(&pdu->u.cmd_unlink, send);
+ break;
+ case USBIP_RET_UNLINK:
+ correct_endian_ret_unlink(&pdu->u.ret_unlink, send);
+ break;
+ default:
+ /* NOTREACHED */
+ err("unknown command in pdu header: %d", cmd);
+ /* BUG(); */
+ }
+}
+EXPORT_SYMBOL(usbip_header_correct_endian);
+
+static void usbip_iso_pakcet_correct_endian(
+ struct usbip_iso_packet_descriptor *iso,
+ int send)
+{
+ /* does not need all members. but copy all simply. */
+ if (send) {
+ iso->offset = cpu_to_be32(iso->offset);
+ iso->length = cpu_to_be32(iso->length);
+ iso->status = cpu_to_be32(iso->status);
+ iso->actual_length = cpu_to_be32(iso->actual_length);
+ } else {
+ iso->offset = be32_to_cpu(iso->offset);
+ iso->length = be32_to_cpu(iso->length);
+ iso->status = be32_to_cpu(iso->status);
+ iso->actual_length = be32_to_cpu(iso->actual_length);
+ }
+}
+
+static void usbip_pack_iso(struct usbip_iso_packet_descriptor *iso,
+ struct usb_iso_packet_descriptor *uiso, int pack)
+{
+ if (pack) {
+ iso->offset = uiso->offset;
+ iso->length = uiso->length;
+ iso->status = uiso->status;
+ iso->actual_length = uiso->actual_length;
+ } else {
+ uiso->offset = iso->offset;
+ uiso->length = iso->length;
+ uiso->status = iso->status;
+ uiso->actual_length = iso->actual_length;
+ }
+}
+
+
+/* must free buffer */
+void *usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen)
+{
+ void *buff;
+ struct usbip_iso_packet_descriptor *iso;
+ int np = urb->number_of_packets;
+ ssize_t size = np * sizeof(*iso);
+ int i;
+
+ buff = kzalloc(size, GFP_KERNEL);
+ if (!buff)
+ return NULL;
+
+ for (i = 0; i < np; i++) {
+ iso = buff + (i * sizeof(*iso));
+
+ usbip_pack_iso(iso, &urb->iso_frame_desc[i], 1);
+ usbip_iso_pakcet_correct_endian(iso, 1);
+ }
+
+ *bufflen = size;
+
+ return buff;
+}
+EXPORT_SYMBOL(usbip_alloc_iso_desc_pdu);
+
+/* some members of urb must be substituted before. */
+int usbip_recv_iso(struct usbip_device *ud, struct urb *urb)
+{
+ void *buff;
+ struct usbip_iso_packet_descriptor *iso;
+ int np = urb->number_of_packets;
+ int size = np * sizeof(*iso);
+ int i;
+ int ret;
+
+ if (!usb_pipeisoc(urb->pipe))
+ return 0;
+
+ /* my Bluetooth dongle gets ISO URBs which are np = 0 */
+ if (np == 0) {
+ /* uinfo("iso np == 0\n"); */
+ /* usbip_dump_urb(urb); */
+ return 0;
+ }
+
+ buff = kzalloc(size, GFP_KERNEL);
+ if (!buff)
+ return -ENOMEM;
+
+ ret = usbip_xmit(0, ud->tcp_socket, buff, size, 0);
+ if (ret != size) {
+ dev_err(&urb->dev->dev, "recv iso_frame_descriptor, %d\n",
+ ret);
+ kfree(buff);
+
+ if (ud->side == USBIP_STUB)
+ usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
+ else
+ usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
+
+ return -EPIPE;
+ }
+
+ for (i = 0; i < np; i++) {
+ iso = buff + (i * sizeof(*iso));
+
+ usbip_iso_pakcet_correct_endian(iso, 0);
+ usbip_pack_iso(iso, &urb->iso_frame_desc[i], 0);
+ }
+
+
+ kfree(buff);
+
+ return ret;
+}
+EXPORT_SYMBOL(usbip_recv_iso);
+
+
+/* some members of urb must be substituted before. */
+int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb)
+{
+ int ret;
+ int size;
+
+ if (ud->side == USBIP_STUB) {
+ /* stub_rx.c */
+ /* the direction of urb must be OUT. */
+ if (usb_pipein(urb->pipe))
+ return 0;
+
+ size = urb->transfer_buffer_length;
+ } else {
+ /* vhci_rx.c */
+ /* the direction of urb must be IN. */
+ if (usb_pipeout(urb->pipe))
+ return 0;
+
+ size = urb->actual_length;
+ }
+
+ /* no need to recv xbuff */
+ if (!(size > 0))
+ return 0;
+
+ ret = usbip_xmit(0, ud->tcp_socket, (char *)urb->transfer_buffer,
+ size, 0);
+ if (ret != size) {
+ dev_err(&urb->dev->dev, "recv xbuf, %d\n", ret);
+ if (ud->side == USBIP_STUB) {
+ usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
+ } else {
+ usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
+ return -EPIPE;
+ }
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL(usbip_recv_xbuff);
+
+
+/*-------------------------------------------------------------------------*/
+
+static int __init usbip_common_init(void)
+{
+ info(DRIVER_DESC "" DRIVER_VERSION);
+
+ return 0;
+}
+
+static void __exit usbip_common_exit(void)
+{
+ return;
+}
+
+
+
+
+module_init(usbip_common_init);
+module_exit(usbip_common_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
--- /dev/null
+++ b/drivers/usb/ip/usbip_common.h
@@ -0,0 +1,406 @@
+/*
+ * 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.
+ */
+
+#ifndef __VHCI_COMMON_H
+#define __VHCI_COMMON_H
+
+
+#include <linux/version.h>
+#include <linux/usb.h>
+#include <asm/byteorder.h>
+#include <net/sock.h>
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * define macros to print messages
+ */
+
+/**
+ * udbg - print debug messages if CONFIG_USB_DEBUG is defined
+ * @fmt:
+ * @args:
+ */
+
+#ifdef CONFIG_USB_DEBUG
+
+#define udbg(fmt, args...) \
+ do { \
+ printk(KERN_DEBUG "%-10s:(%s,%d) %s: " fmt, \
+ (in_interrupt() ? "interrupt" : (current)->comm),\
+ __FILE__, __LINE__, __func__, ##args); \
+ } while (0)
+
+#else /* CONFIG_USB_DEBUG */
+
+#define udbg(fmt, args...) do { } while (0)
+
+#endif /* CONFIG_USB_DEBUG */
+
+
+enum {
+ usbip_debug_xmit = (1 << 0),
+ usbip_debug_sysfs = (1 << 1),
+ usbip_debug_urb = (1 << 2),
+ usbip_debug_eh = (1 << 3),
+
+ usbip_debug_stub_cmp = (1 << 8),
+ usbip_debug_stub_dev = (1 << 9),
+ usbip_debug_stub_rx = (1 << 10),
+ usbip_debug_stub_tx = (1 << 11),
+
+ usbip_debug_vhci_rh = (1 << 8),
+ usbip_debug_vhci_hc = (1 << 9),
+ usbip_debug_vhci_rx = (1 << 10),
+ usbip_debug_vhci_tx = (1 << 11),
+ usbip_debug_vhci_sysfs = (1 << 12)
+};
+
+#define dbg_flag_xmit (usbip_debug_flag & usbip_debug_xmit)
+#define dbg_flag_vhci_rh (usbip_debug_flag & usbip_debug_vhci_rh)
+#define dbg_flag_vhci_hc (usbip_debug_flag & usbip_debug_vhci_hc)
+#define dbg_flag_vhci_rx (usbip_debug_flag & usbip_debug_vhci_rx)
+#define dbg_flag_vhci_tx (usbip_debug_flag & usbip_debug_vhci_tx)
+#define dbg_flag_vhci_sysfs (usbip_debug_flag & usbip_debug_vhci_sysfs)
+#define dbg_flag_stub_rx (usbip_debug_flag & usbip_debug_stub_rx)
+#define dbg_flag_stub_tx (usbip_debug_flag & usbip_debug_stub_tx)
+
+extern unsigned long usbip_debug_flag;
+extern struct device_attribute dev_attr_usbip_debug;
+
+#define dbg_with_flag(flag, fmt, args...) \
+ do { \
+ if (flag & usbip_debug_flag) \
+ udbg(fmt , ##args); \
+ } while (0)
+
+#define dbg_sysfs(fmt, args...) \
+ dbg_with_flag(usbip_debug_sysfs, fmt , ##args)
+#define dbg_xmit(fmt, args...) \
+ dbg_with_flag(usbip_debug_xmit, fmt , ##args)
+#define dbg_urb(fmt, args...) \
+ dbg_with_flag(usbip_debug_urb, fmt , ##args)
+#define dbg_eh(fmt, args...) \
+ dbg_with_flag(usbip_debug_eh, fmt , ##args)
+
+#define dbg_vhci_rh(fmt, args...) \
+ dbg_with_flag(usbip_debug_vhci_rh, fmt , ##args)
+#define dbg_vhci_hc(fmt, args...) \
+ dbg_with_flag(usbip_debug_vhci_hc, fmt , ##args)
+#define dbg_vhci_rx(fmt, args...) \
+ dbg_with_flag(usbip_debug_vhci_rx, fmt , ##args)
+#define dbg_vhci_tx(fmt, args...) \
+ dbg_with_flag(usbip_debug_vhci_tx, fmt , ##args)
+#define dbg_vhci_sysfs(fmt, args...) \
+ dbg_with_flag(usbip_debug_vhci_sysfs, fmt , ##args)
+
+#define dbg_stub_cmp(fmt, args...) \
+ dbg_with_flag(usbip_debug_stub_cmp, fmt , ##args)
+#define dbg_stub_rx(fmt, args...) \
+ dbg_with_flag(usbip_debug_stub_rx, fmt , ##args)
+#define dbg_stub_tx(fmt, args...) \
+ dbg_with_flag(usbip_debug_stub_tx, fmt , ##args)
+
+
+/**
+ * uerr - print error messages
+ * @fmt:
+ * @args:
+ */
+#define uerr(fmt, args...) \
+ do { \
+ printk(KERN_ERR "%-10s: ***ERROR*** (%s,%d) %s: " fmt, \
+ (in_interrupt() ? "interrupt" : (current)->comm),\
+ __FILE__, __LINE__, __func__, ##args); \
+ } while (0)
+
+/**
+ * uinfo - print information messages
+ * @fmt:
+ * @args:
+ */
+#define uinfo(fmt, args...) \
+ do { \
+ printk(KERN_INFO "usbip: " fmt , ## args); \
+ } while (0)
+
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * USB/IP request headers.
+ * Currently, we define 4 request types:
+ *
+ * - CMD_SUBMIT transfers a USB request, corresponding to usb_submit_urb().
+ * (client to server)
+ * - RET_RETURN transfers the result of CMD_SUBMIT.
+ * (server to client)
+ * - CMD_UNLINK transfers an unlink request of a pending USB request.
+ * (client to server)
+ * - RET_UNLINK transfers the result of CMD_UNLINK.
+ * (server to client)
+ *
+ * Note: The below request formats are based on the USB subsystem of Linux. Its
+ * details will be defined when other implementations come.
+ *
+ *
+ */
+
+/*
+ * A basic header followed by other additional headers.
+ */
+struct usbip_header_basic {
+#define USBIP_CMD_SUBMIT 0x0001
+#define USBIP_CMD_UNLINK 0x0002
+#define USBIP_RET_SUBMIT 0x0003
+#define USBIP_RET_UNLINK 0x0004
+ __u32 command;
+
+ /* sequencial number which identifies requests.
+ * incremented per connections */
+ __u32 seqnum;
+
+ /* devid is used to specify a remote USB device uniquely instead
+ * of busnum and devnum in Linux. In the case of Linux stub_driver,
+ * this value is ((busnum << 16) | devnum) */
+ __u32 devid;
+
+#define USBIP_DIR_OUT 0
+#define USBIP_DIR_IN 1
+ __u32 direction;
+ __u32 ep; /* endpoint number */
+} __attribute__ ((packed));
+
+/*
+ * An additional header for a CMD_SUBMIT packet.
+ */
+struct usbip_header_cmd_submit {
+ /* these values are basically the same as in a URB. */
+
+ /* the same in a URB. */
+ __u32 transfer_flags;
+
+ /* set the following data size (out),
+ * or expected reading data size (in) */
+ __s32 transfer_buffer_length;
+
+ /* it is difficult for usbip to sync frames (reserved only?) */
+ __s32 start_frame;
+
+ /* the number of iso descriptors that follows this header */
+ __s32 number_of_packets;
+
+ /* the maximum time within which this request works in a host
+ * controller of a server side */
+ __s32 interval;
+
+ /* set setup packet data for a CTRL request */
+ unsigned char setup[8];
+} __attribute__ ((packed));
+
+/*
+ * An additional header for a RET_SUBMIT packet.
+ */
+struct usbip_header_ret_submit {
+ __s32 status;
+ __s32 actual_length; /* returned data length */
+ __s32 start_frame; /* ISO and INT */
+ __s32 number_of_packets; /* ISO only */
+ __s32 error_count; /* ISO only */
+} __attribute__ ((packed));
+
+/*
+ * An additional header for a CMD_UNLINK packet.
+ */
+struct usbip_header_cmd_unlink {
+ __u32 seqnum; /* URB's seqnum which will be unlinked */
+} __attribute__ ((packed));
+
+
+/*
+ * An additional header for a RET_UNLINK packet.
+ */
+struct usbip_header_ret_unlink {
+ __s32 status;
+} __attribute__ ((packed));
+
+
+/* the same as usb_iso_packet_descriptor but packed for pdu */
+struct usbip_iso_packet_descriptor {
+ __u32 offset;
+ __u32 length; /* expected length */
+ __u32 actual_length;
+ __u32 status;
+} __attribute__ ((packed));
+
+
+/*
+ * All usbip packets use a common header to keep code simple.
+ */
+struct usbip_header {
+ struct usbip_header_basic base;
+
+ union {
+ struct usbip_header_cmd_submit cmd_submit;
+ struct usbip_header_ret_submit ret_submit;
+ struct usbip_header_cmd_unlink cmd_unlink;
+ struct usbip_header_ret_unlink ret_unlink;
+ } u;
+} __attribute__ ((packed));
+
+
+
+
+/*-------------------------------------------------------------------------*/
+
+
+int usbip_xmit(int, struct socket *, char *, int, int);
+int usbip_sendmsg(struct socket *, struct msghdr *, int);
+
+
+static inline int interface_to_busnum(struct usb_interface *interface)
+{
+ struct usb_device *udev = interface_to_usbdev(interface);
+ return udev->bus->busnum;
+}
+
+static inline int interface_to_devnum(struct usb_interface *interface)
+{
+ struct usb_device *udev = interface_to_usbdev(interface);
+ return udev->devnum;
+}
+
+static inline int interface_to_infnum(struct usb_interface *interface)
+{
+ return interface->cur_altsetting->desc.bInterfaceNumber;
+}
+
+#if 0
+int setnodelay(struct socket *);
+int setquickack(struct socket *);
+int setkeepalive(struct socket *socket);
+void setreuse(struct socket *);
+#endif
+
+struct socket *sockfd_to_socket(unsigned int);
+int set_sockaddr(struct socket *socket, struct sockaddr_storage *ss);
+
+void usbip_dump_urb(struct urb *purb);
+void usbip_dump_header(struct usbip_header *pdu);
+
+
+struct usbip_device;
+
+struct usbip_task {
+ struct task_struct *thread;
+ struct completion thread_done;
+ char *name;
+ void (*loop_ops)(struct usbip_task *);
+};
+
+enum usbip_side {
+ USBIP_VHCI,
+ USBIP_STUB,
+};
+
+enum usbip_status {
+ /* sdev is available. */
+ SDEV_ST_AVAILABLE = 0x01,
+ /* sdev is now used. */
+ SDEV_ST_USED,
+ /* sdev is unusable because of a fatal error. */
+ SDEV_ST_ERROR,
+
+ /* vdev does not connect a remote device. */
+ VDEV_ST_NULL,
+ /* vdev is used, but the USB address is not assigned yet */
+ VDEV_ST_NOTASSIGNED,
+ VDEV_ST_USED,
+ VDEV_ST_ERROR
+};
+
+/* a common structure for stub_device and vhci_device */
+struct usbip_device {
+ enum usbip_side side;
+
+ enum usbip_status status;
+
+ /* lock for status */
+ spinlock_t lock;
+
+ struct socket *tcp_socket;
+
+ struct usbip_task tcp_rx;
+ struct usbip_task tcp_tx;
+
+ /* event handler */
+#define USBIP_EH_SHUTDOWN (1 << 0)
+#define USBIP_EH_BYE (1 << 1)
+#define USBIP_EH_RESET (1 << 2)
+#define USBIP_EH_UNUSABLE (1 << 3)
+
+#define SDEV_EVENT_REMOVED (USBIP_EH_SHUTDOWN | USBIP_EH_RESET | USBIP_EH_BYE)
+#define SDEV_EVENT_DOWN (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
+#define SDEV_EVENT_ERROR_TCP (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
+#define SDEV_EVENT_ERROR_SUBMIT (USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
+#define SDEV_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)
+#define VDEV_EVENT_ERROR_MALLOC (USBIP_EH_SHUTDOWN | USBIP_EH_UNUSABLE)
+
+ unsigned long event;
+ struct usbip_task eh;
+ wait_queue_head_t eh_waitq;
+
+ struct eh_ops {
+ void (*shutdown)(struct usbip_device *);
+ void (*reset)(struct usbip_device *);
+ void (*unusable)(struct usbip_device *);
+ } eh_ops;
+};
+
+
+void usbip_task_init(struct usbip_task *ut, char *,
+ void (*loop_ops)(struct usbip_task *));
+
+void usbip_start_threads(struct usbip_device *ud);
+void usbip_stop_threads(struct usbip_device *ud);
+int usbip_thread(void *param);
+
+void usbip_pack_pdu(struct usbip_header *pdu, struct urb *urb, int cmd,
+ int pack);
+
+void usbip_header_correct_endian(struct usbip_header *pdu, int send);
+/* some members of urb must be substituted before. */
+int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb);
+/* some members of urb must be substituted before. */
+int usbip_recv_iso(struct usbip_device *ud, struct urb *urb);
+void *usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen);
+
+
+/* usbip_event.c */
+void 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_happend(struct usbip_device *ud);
+
+
+#endif
--- /dev/null
+++ b/drivers/usb/ip/usbip_event.c
@@ -0,0 +1,141 @@
+/*
+ * 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"
+
+static int event_handler(struct usbip_device *ud)
+{
+ dbg_eh("enter\n");
+
+ /*
+ * Events are handled by only this thread.
+ */
+ while (usbip_event_happend(ud)) {
+ dbg_eh("pending event %lx\n", ud->event);
+
+ /*
+ * NOTE: shutdown must come first.
+ * Shutdown the device.
+ */
+ if (ud->event & USBIP_EH_SHUTDOWN) {
+ ud->eh_ops.shutdown(ud);
+
+ ud->event &= ~USBIP_EH_SHUTDOWN;
+
+ break;
+ }
+
+ /* Stop the error handler. */
+ if (ud->event & USBIP_EH_BYE)
+ return -1;
+
+ /* Reset the device. */
+ if (ud->event & USBIP_EH_RESET) {
+ ud->eh_ops.reset(ud);
+
+ ud->event &= ~USBIP_EH_RESET;
+
+ break;
+ }
+
+ /* Mark the device as unusable. */
+ if (ud->event & USBIP_EH_UNUSABLE) {
+ ud->eh_ops.unusable(ud);
+
+ ud->event &= ~USBIP_EH_UNUSABLE;
+
+ break;
+ }
+
+ /* NOTREACHED */
+ printk(KERN_ERR "%s: unknown event\n", __func__);
+ return -1;
+ }
+
+ return 0;
+}
+
+static void event_handler_loop(struct usbip_task *ut)
+{
+ struct usbip_device *ud = container_of(ut, struct usbip_device, eh);
+
+ while (1) {
+ if (signal_pending(current)) {
+ dbg_eh("signal catched!\n");
+ break;
+ }
+
+ if (event_handler(ud) < 0)
+ break;
+
+ wait_event_interruptible(ud->eh_waitq, usbip_event_happend(ud));
+ dbg_eh("wakeup\n");
+ }
+}
+
+void usbip_start_eh(struct usbip_device *ud)
+{
+ struct usbip_task *eh = &ud->eh;
+
+ init_waitqueue_head(&ud->eh_waitq);
+ ud->event = 0;
+
+ usbip_task_init(eh, "usbip_eh", event_handler_loop);
+
+ kernel_thread(usbip_thread, (void *)eh, 0);
+
+ wait_for_completion(&eh->thread_done);
+}
+EXPORT_SYMBOL(usbip_start_eh);
+
+void usbip_stop_eh(struct usbip_device *ud)
+{
+ struct usbip_task *eh = &ud->eh;
+
+ wait_for_completion(&eh->thread_done);
+ dbg_eh("usbip_eh has finished\n");
+}
+EXPORT_SYMBOL(usbip_stop_eh);
+
+void usbip_event_add(struct usbip_device *ud, unsigned long event)
+{
+ spin_lock(&ud->lock);
+
+ ud->event |= event;
+
+ wake_up(&ud->eh_waitq);
+
+ spin_unlock(&ud->lock);
+}
+EXPORT_SYMBOL(usbip_event_add);
+
+int usbip_event_happend(struct usbip_device *ud)
+{
+ int happend = 0;
+
+ spin_lock(&ud->lock);
+
+ if (ud->event != 0)
+ happend = 1;
+
+ spin_unlock(&ud->lock);
+
+ return happend;
+}
+EXPORT_SYMBOL(usbip_event_happend);
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -101,6 +101,8 @@ source "drivers/usb/host/Kconfig"

source "drivers/usb/musb/Kconfig"

+source "drivers/usb/ip/Kconfig"
+
source "drivers/usb/class/Kconfig"

source "drivers/usb/storage/Kconfig"
--- a/drivers/usb/Makefile
+++ b/drivers/usb/Makefile
@@ -19,6 +19,8 @@ obj-$(CONFIG_USB_R8A66597_HCD) += host/

obj-$(CONFIG_USB_C67X00_HCD) += c67x00/

+obj-$(CONFIG_USB_IP_COMMON) += ip/
+
obj-$(CONFIG_USB_ACM) += class/
obj-$(CONFIG_USB_PRINTER) += class/

--


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  Last update: 2008-08-29 01:09    [from the cache]
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