![matt mooney](/assets/img/avatar_default.png)
This switches all of the usbip_u{dbg,err,info} and printk statements to dev_<level>, if possible, or pr_<level> macros. And removes a few unnecessary debug statements. Signed-off-by: matt mooney <mfm@muteddisk.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
227 lines
5.6 KiB
C
227 lines
5.6 KiB
C
/*
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* Copyright (C) 2003-2008 Takahiro Hirofuchi
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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#include <linux/kthread.h>
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#include <linux/slab.h>
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#include "usbip_common.h"
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#include "vhci.h"
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static void setup_cmd_submit_pdu(struct usbip_header *pdup, struct urb *urb)
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{
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struct vhci_priv *priv = ((struct vhci_priv *)urb->hcpriv);
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struct vhci_device *vdev = priv->vdev;
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usbip_dbg_vhci_tx("URB, local devnum %u, remote devid %u\n",
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usb_pipedevice(urb->pipe), vdev->devid);
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pdup->base.command = USBIP_CMD_SUBMIT;
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pdup->base.seqnum = priv->seqnum;
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pdup->base.devid = vdev->devid;
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pdup->base.direction = usb_pipein(urb->pipe) ?
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USBIP_DIR_IN : USBIP_DIR_OUT;
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pdup->base.ep = usb_pipeendpoint(urb->pipe);
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usbip_pack_pdu(pdup, urb, USBIP_CMD_SUBMIT, 1);
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if (urb->setup_packet)
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memcpy(pdup->u.cmd_submit.setup, urb->setup_packet, 8);
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}
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static struct vhci_priv *dequeue_from_priv_tx(struct vhci_device *vdev)
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{
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unsigned long flags;
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struct vhci_priv *priv, *tmp;
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spin_lock_irqsave(&vdev->priv_lock, flags);
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list_for_each_entry_safe(priv, tmp, &vdev->priv_tx, list) {
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list_move_tail(&priv->list, &vdev->priv_rx);
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spin_unlock_irqrestore(&vdev->priv_lock, flags);
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return priv;
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}
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spin_unlock_irqrestore(&vdev->priv_lock, flags);
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return NULL;
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}
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static int vhci_send_cmd_submit(struct vhci_device *vdev)
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{
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struct vhci_priv *priv = NULL;
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struct msghdr msg;
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struct kvec iov[3];
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size_t txsize;
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size_t total_size = 0;
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while ((priv = dequeue_from_priv_tx(vdev)) != NULL) {
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int ret;
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struct urb *urb = priv->urb;
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struct usbip_header pdu_header;
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void *iso_buffer = NULL;
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txsize = 0;
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memset(&pdu_header, 0, sizeof(pdu_header));
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memset(&msg, 0, sizeof(msg));
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memset(&iov, 0, sizeof(iov));
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usbip_dbg_vhci_tx("setup txdata urb %p\n", urb);
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/* 1. setup usbip_header */
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setup_cmd_submit_pdu(&pdu_header, urb);
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usbip_header_correct_endian(&pdu_header, 1);
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iov[0].iov_base = &pdu_header;
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iov[0].iov_len = sizeof(pdu_header);
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txsize += sizeof(pdu_header);
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/* 2. setup transfer buffer */
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if (!usb_pipein(urb->pipe) && urb->transfer_buffer_length > 0) {
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iov[1].iov_base = urb->transfer_buffer;
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iov[1].iov_len = urb->transfer_buffer_length;
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txsize += urb->transfer_buffer_length;
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}
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/* 3. setup iso_packet_descriptor */
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if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
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ssize_t len = 0;
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iso_buffer = usbip_alloc_iso_desc_pdu(urb, &len);
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if (!iso_buffer) {
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usbip_event_add(&vdev->ud,
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SDEV_EVENT_ERROR_MALLOC);
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return -1;
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}
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iov[2].iov_base = iso_buffer;
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iov[2].iov_len = len;
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txsize += len;
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}
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ret = kernel_sendmsg(vdev->ud.tcp_socket, &msg, iov, 3, txsize);
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if (ret != txsize) {
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pr_err("sendmsg failed!, ret=%d for %zd\n", ret,
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txsize);
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kfree(iso_buffer);
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usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_TCP);
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return -1;
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}
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kfree(iso_buffer);
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usbip_dbg_vhci_tx("send txdata\n");
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total_size += txsize;
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}
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return total_size;
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}
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static struct vhci_unlink *dequeue_from_unlink_tx(struct vhci_device *vdev)
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{
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unsigned long flags;
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struct vhci_unlink *unlink, *tmp;
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spin_lock_irqsave(&vdev->priv_lock, flags);
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list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) {
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list_move_tail(&unlink->list, &vdev->unlink_rx);
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spin_unlock_irqrestore(&vdev->priv_lock, flags);
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return unlink;
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}
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spin_unlock_irqrestore(&vdev->priv_lock, flags);
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return NULL;
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}
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static int vhci_send_cmd_unlink(struct vhci_device *vdev)
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{
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struct vhci_unlink *unlink = NULL;
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struct msghdr msg;
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struct kvec iov[3];
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size_t txsize;
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size_t total_size = 0;
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while ((unlink = dequeue_from_unlink_tx(vdev)) != NULL) {
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int ret;
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struct usbip_header pdu_header;
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txsize = 0;
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memset(&pdu_header, 0, sizeof(pdu_header));
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memset(&msg, 0, sizeof(msg));
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memset(&iov, 0, sizeof(iov));
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usbip_dbg_vhci_tx("setup cmd unlink, %lu\n", unlink->seqnum);
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/* 1. setup usbip_header */
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pdu_header.base.command = USBIP_CMD_UNLINK;
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pdu_header.base.seqnum = unlink->seqnum;
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pdu_header.base.devid = vdev->devid;
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pdu_header.base.ep = 0;
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pdu_header.u.cmd_unlink.seqnum = unlink->unlink_seqnum;
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usbip_header_correct_endian(&pdu_header, 1);
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iov[0].iov_base = &pdu_header;
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iov[0].iov_len = sizeof(pdu_header);
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txsize += sizeof(pdu_header);
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ret = kernel_sendmsg(vdev->ud.tcp_socket, &msg, iov, 1, txsize);
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if (ret != txsize) {
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pr_err("sendmsg failed!, ret=%d for %zd\n", ret,
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txsize);
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usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_TCP);
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return -1;
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}
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usbip_dbg_vhci_tx("send txdata\n");
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total_size += txsize;
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}
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return total_size;
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}
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int vhci_tx_loop(void *data)
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{
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struct usbip_device *ud = data;
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struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
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while (!kthread_should_stop()) {
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if (vhci_send_cmd_submit(vdev) < 0)
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break;
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if (vhci_send_cmd_unlink(vdev) < 0)
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break;
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wait_event_interruptible(vdev->waitq_tx,
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(!list_empty(&vdev->priv_tx) ||
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!list_empty(&vdev->unlink_tx) ||
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kthread_should_stop()));
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usbip_dbg_vhci_tx("pending urbs ?, now wake up\n");
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}
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return 0;
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}
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