![Yuyang Du](/assets/img/avatar_default.png)
The patch 03cd00d538
: "usbip: vhci-hcd: Set the vhci structure up
to work" introduced a bug which uses a vairable without initialization
in error handling code. Fix it.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Yuyang Du <yuyang.du@intel.com>
Acked-by: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1546 lines
38 KiB
C
1546 lines
38 KiB
C
/*
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* Copyright (C) 2003-2008 Takahiro Hirofuchi
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* Copyright (C) 2015-2016 Nobuo Iwata
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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/init.h>
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#include <linux/file.h>
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#include <linux/kernel.h>
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#include <linux/kthread.h>
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#include <linux/module.h>
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#include <linux/platform_device.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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#define DRIVER_AUTHOR "Takahiro Hirofuchi"
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#define DRIVER_DESC "USB/IP 'Virtual' Host Controller (VHCI) Driver"
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/*
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* TODO
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* - update root hub emulation
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* - move the emulation code to userland ?
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* porting to other operating systems
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* minimize kernel code
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* - add suspend/resume code
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* - clean up everything
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*/
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/* See usb gadget dummy hcd */
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static int vhci_hub_status(struct usb_hcd *hcd, char *buff);
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static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
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u16 wIndex, char *buff, u16 wLength);
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static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
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gfp_t mem_flags);
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static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status);
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static int vhci_start(struct usb_hcd *vhci_hcd);
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static void vhci_stop(struct usb_hcd *hcd);
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static int vhci_get_frame_number(struct usb_hcd *hcd);
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static const char driver_name[] = "vhci_hcd";
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static const char driver_desc[] = "USB/IP Virtual Host Controller";
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int vhci_num_controllers = VHCI_NR_HCS;
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struct vhci *vhcis;
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static const char * const bit_desc[] = {
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"CONNECTION", /*0*/
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"ENABLE", /*1*/
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"SUSPEND", /*2*/
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"OVER_CURRENT", /*3*/
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"RESET", /*4*/
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"L1", /*5*/
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"R6", /*6*/
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"R7", /*7*/
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"POWER", /*8*/
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"LOWSPEED", /*9*/
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"HIGHSPEED", /*10*/
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"PORT_TEST", /*11*/
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"INDICATOR", /*12*/
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"R13", /*13*/
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"R14", /*14*/
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"R15", /*15*/
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"C_CONNECTION", /*16*/
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"C_ENABLE", /*17*/
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"C_SUSPEND", /*18*/
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"C_OVER_CURRENT", /*19*/
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"C_RESET", /*20*/
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"C_L1", /*21*/
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"R22", /*22*/
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"R23", /*23*/
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"R24", /*24*/
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"R25", /*25*/
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"R26", /*26*/
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"R27", /*27*/
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"R28", /*28*/
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"R29", /*29*/
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"R30", /*30*/
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"R31", /*31*/
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};
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static const char * const bit_desc_ss[] = {
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"CONNECTION", /*0*/
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"ENABLE", /*1*/
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"SUSPEND", /*2*/
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"OVER_CURRENT", /*3*/
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"RESET", /*4*/
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"L1", /*5*/
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"R6", /*6*/
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"R7", /*7*/
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"R8", /*8*/
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"POWER", /*9*/
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"HIGHSPEED", /*10*/
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"PORT_TEST", /*11*/
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"INDICATOR", /*12*/
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"R13", /*13*/
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"R14", /*14*/
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"R15", /*15*/
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"C_CONNECTION", /*16*/
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"C_ENABLE", /*17*/
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"C_SUSPEND", /*18*/
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"C_OVER_CURRENT", /*19*/
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"C_RESET", /*20*/
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"C_BH_RESET", /*21*/
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"C_LINK_STATE", /*22*/
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"C_CONFIG_ERROR", /*23*/
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"R24", /*24*/
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"R25", /*25*/
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"R26", /*26*/
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"R27", /*27*/
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"R28", /*28*/
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"R29", /*29*/
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"R30", /*30*/
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"R31", /*31*/
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};
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static void dump_port_status_diff(u32 prev_status, u32 new_status, bool usb3)
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{
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int i = 0;
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u32 bit = 1;
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const char * const *desc = bit_desc;
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if (usb3)
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desc = bit_desc_ss;
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pr_debug("status prev -> new: %08x -> %08x\n", prev_status, new_status);
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while (bit) {
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u32 prev = prev_status & bit;
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u32 new = new_status & bit;
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char change;
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if (!prev && new)
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change = '+';
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else if (prev && !new)
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change = '-';
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else
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change = ' ';
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if (prev || new) {
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pr_debug(" %c%s\n", change, desc[i]);
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if (bit == 1) /* USB_PORT_STAT_CONNECTION */
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pr_debug(" %c%s\n", change, "USB_PORT_STAT_SPEED_5GBPS");
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}
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bit <<= 1;
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i++;
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}
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pr_debug("\n");
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}
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void rh_port_connect(struct vhci_device *vdev, enum usb_device_speed speed)
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{
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struct vhci_hcd *vhci_hcd = vdev_to_vhci_hcd(vdev);
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struct vhci *vhci = vhci_hcd->vhci;
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int rhport = vdev->rhport;
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u32 status;
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unsigned long flags;
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usbip_dbg_vhci_rh("rh_port_connect %d\n", rhport);
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spin_lock_irqsave(&vhci->lock, flags);
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status = vhci_hcd->port_status[rhport];
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status |= USB_PORT_STAT_CONNECTION | (1 << USB_PORT_FEAT_C_CONNECTION);
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switch (speed) {
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case USB_SPEED_HIGH:
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status |= USB_PORT_STAT_HIGH_SPEED;
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break;
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case USB_SPEED_LOW:
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status |= USB_PORT_STAT_LOW_SPEED;
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break;
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default:
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break;
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}
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vhci_hcd->port_status[rhport] = status;
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spin_unlock_irqrestore(&vhci->lock, flags);
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usb_hcd_poll_rh_status(vhci_hcd_to_hcd(vhci_hcd));
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}
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static void rh_port_disconnect(struct vhci_device *vdev)
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{
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struct vhci_hcd *vhci_hcd = vdev_to_vhci_hcd(vdev);
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struct vhci *vhci = vhci_hcd->vhci;
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int rhport = vdev->rhport;
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u32 status;
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unsigned long flags;
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usbip_dbg_vhci_rh("rh_port_disconnect %d\n", rhport);
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spin_lock_irqsave(&vhci->lock, flags);
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status = vhci_hcd->port_status[rhport];
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status &= ~USB_PORT_STAT_CONNECTION;
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status |= (1 << USB_PORT_FEAT_C_CONNECTION);
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vhci_hcd->port_status[rhport] = status;
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spin_unlock_irqrestore(&vhci->lock, flags);
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usb_hcd_poll_rh_status(vhci_hcd_to_hcd(vhci_hcd));
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}
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#define PORT_C_MASK \
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((USB_PORT_STAT_C_CONNECTION \
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| USB_PORT_STAT_C_ENABLE \
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| USB_PORT_STAT_C_SUSPEND \
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| USB_PORT_STAT_C_OVERCURRENT \
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| USB_PORT_STAT_C_RESET) << 16)
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/*
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* Returns 0 if the status hasn't changed, or the number of bytes in buf.
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* Ports are 0-indexed from the HCD point of view,
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* and 1-indexed from the USB core pointer of view.
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*
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* @buf: a bitmap to show which port status has been changed.
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* bit 0: reserved
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* bit 1: the status of port 0 has been changed.
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* bit 2: the status of port 1 has been changed.
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* ...
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*/
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static int vhci_hub_status(struct usb_hcd *hcd, char *buf)
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{
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struct vhci_hcd *vhci_hcd = hcd_to_vhci_hcd(hcd);
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struct vhci *vhci = vhci_hcd->vhci;
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int retval = DIV_ROUND_UP(VHCI_HC_PORTS + 1, 8);
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int rhport;
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int changed = 0;
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unsigned long flags;
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memset(buf, 0, retval);
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spin_lock_irqsave(&vhci->lock, flags);
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if (!HCD_HW_ACCESSIBLE(hcd)) {
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usbip_dbg_vhci_rh("hw accessible flag not on?\n");
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goto done;
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}
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/* check pseudo status register for each port */
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for (rhport = 0; rhport < VHCI_HC_PORTS; rhport++) {
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if ((vhci_hcd->port_status[rhport] & PORT_C_MASK)) {
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/* The status of a port has been changed, */
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usbip_dbg_vhci_rh("port %d status changed\n", rhport);
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buf[(rhport + 1) / 8] |= 1 << (rhport + 1) % 8;
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changed = 1;
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}
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}
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if ((hcd->state == HC_STATE_SUSPENDED) && (changed == 1))
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usb_hcd_resume_root_hub(hcd);
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done:
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spin_unlock_irqrestore(&vhci->lock, flags);
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return changed ? retval : 0;
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}
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/* usb 3.0 root hub device descriptor */
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static struct {
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struct usb_bos_descriptor bos;
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struct usb_ss_cap_descriptor ss_cap;
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} __packed usb3_bos_desc = {
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.bos = {
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.bLength = USB_DT_BOS_SIZE,
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.bDescriptorType = USB_DT_BOS,
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.wTotalLength = cpu_to_le16(sizeof(usb3_bos_desc)),
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.bNumDeviceCaps = 1,
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},
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.ss_cap = {
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.bLength = USB_DT_USB_SS_CAP_SIZE,
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.bDescriptorType = USB_DT_DEVICE_CAPABILITY,
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.bDevCapabilityType = USB_SS_CAP_TYPE,
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.wSpeedSupported = cpu_to_le16(USB_5GBPS_OPERATION),
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.bFunctionalitySupport = ilog2(USB_5GBPS_OPERATION),
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},
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};
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static inline void
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ss_hub_descriptor(struct usb_hub_descriptor *desc)
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{
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memset(desc, 0, sizeof *desc);
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desc->bDescriptorType = USB_DT_SS_HUB;
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desc->bDescLength = 12;
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desc->wHubCharacteristics = cpu_to_le16(
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HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_COMMON_OCPM);
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desc->bNbrPorts = VHCI_HC_PORTS;
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desc->u.ss.bHubHdrDecLat = 0x04; /* Worst case: 0.4 micro sec*/
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desc->u.ss.DeviceRemovable = 0xffff;
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}
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static inline void hub_descriptor(struct usb_hub_descriptor *desc)
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{
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int width;
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memset(desc, 0, sizeof(*desc));
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desc->bDescriptorType = USB_DT_HUB;
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desc->wHubCharacteristics = cpu_to_le16(
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HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_COMMON_OCPM);
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desc->bNbrPorts = VHCI_HC_PORTS;
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BUILD_BUG_ON(VHCI_HC_PORTS > USB_MAXCHILDREN);
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width = desc->bNbrPorts / 8 + 1;
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desc->bDescLength = USB_DT_HUB_NONVAR_SIZE + 2 * width;
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memset(&desc->u.hs.DeviceRemovable[0], 0, width);
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memset(&desc->u.hs.DeviceRemovable[width], 0xff, width);
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}
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static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
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u16 wIndex, char *buf, u16 wLength)
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{
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struct vhci_hcd *vhci_hcd;
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struct vhci *vhci;
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int retval = 0;
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int rhport;
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unsigned long flags;
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u32 prev_port_status[VHCI_HC_PORTS];
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if (!HCD_HW_ACCESSIBLE(hcd))
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return -ETIMEDOUT;
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/*
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* NOTE:
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* wIndex (bits 0-7) shows the port number and begins from 1?
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*/
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wIndex = ((__u8)(wIndex & 0x00ff));
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usbip_dbg_vhci_rh("typeReq %x wValue %x wIndex %x\n", typeReq, wValue,
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wIndex);
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if (wIndex > VHCI_HC_PORTS)
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pr_err("invalid port number %d\n", wIndex);
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rhport = wIndex - 1;
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vhci_hcd = hcd_to_vhci_hcd(hcd);
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vhci = vhci_hcd->vhci;
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spin_lock_irqsave(&vhci->lock, flags);
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/* store old status and compare now and old later */
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if (usbip_dbg_flag_vhci_rh) {
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memcpy(prev_port_status, vhci_hcd->port_status,
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sizeof(prev_port_status));
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}
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switch (typeReq) {
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case ClearHubFeature:
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usbip_dbg_vhci_rh(" ClearHubFeature\n");
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break;
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case ClearPortFeature:
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switch (wValue) {
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case USB_PORT_FEAT_SUSPEND:
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if (hcd->speed == HCD_USB3) {
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pr_err(" ClearPortFeature: USB_PORT_FEAT_SUSPEND req not "
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"supported for USB 3.0 roothub\n");
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goto error;
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}
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usbip_dbg_vhci_rh(
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" ClearPortFeature: USB_PORT_FEAT_SUSPEND\n");
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if (vhci_hcd->port_status[rhport] & USB_PORT_STAT_SUSPEND) {
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/* 20msec signaling */
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vhci_hcd->resuming = 1;
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vhci_hcd->re_timeout = jiffies + msecs_to_jiffies(20);
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}
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break;
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case USB_PORT_FEAT_POWER:
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usbip_dbg_vhci_rh(
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" ClearPortFeature: USB_PORT_FEAT_POWER\n");
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if (hcd->speed == HCD_USB3)
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vhci_hcd->port_status[rhport] &= ~USB_SS_PORT_STAT_POWER;
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else
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vhci_hcd->port_status[rhport] &= ~USB_PORT_STAT_POWER;
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break;
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default:
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usbip_dbg_vhci_rh(" ClearPortFeature: default %x\n",
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wValue);
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vhci_hcd->port_status[rhport] &= ~(1 << wValue);
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break;
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}
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break;
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case GetHubDescriptor:
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usbip_dbg_vhci_rh(" GetHubDescriptor\n");
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if (hcd->speed == HCD_USB3 &&
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(wLength < USB_DT_SS_HUB_SIZE ||
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wValue != (USB_DT_SS_HUB << 8))) {
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pr_err("Wrong hub descriptor type for USB 3.0 roothub.\n");
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goto error;
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}
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if (hcd->speed == HCD_USB3)
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ss_hub_descriptor((struct usb_hub_descriptor *) buf);
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else
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hub_descriptor((struct usb_hub_descriptor *) buf);
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break;
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case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
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if (hcd->speed != HCD_USB3)
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goto error;
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if ((wValue >> 8) != USB_DT_BOS)
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goto error;
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memcpy(buf, &usb3_bos_desc, sizeof(usb3_bos_desc));
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retval = sizeof(usb3_bos_desc);
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break;
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case GetHubStatus:
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usbip_dbg_vhci_rh(" GetHubStatus\n");
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*(__le32 *) buf = cpu_to_le32(0);
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break;
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case GetPortStatus:
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usbip_dbg_vhci_rh(" GetPortStatus port %x\n", wIndex);
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if (wIndex < 1) {
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pr_err("invalid port number %d\n", wIndex);
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retval = -EPIPE;
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}
|
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|
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/* we do not care about resume. */
|
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|
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/* whoever resets or resumes must GetPortStatus to
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* complete it!!
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*/
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if (vhci_hcd->resuming && time_after(jiffies, vhci_hcd->re_timeout)) {
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vhci_hcd->port_status[rhport] |= (1 << USB_PORT_FEAT_C_SUSPEND);
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vhci_hcd->port_status[rhport] &= ~(1 << USB_PORT_FEAT_SUSPEND);
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vhci_hcd->resuming = 0;
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vhci_hcd->re_timeout = 0;
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}
|
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|
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if ((vhci_hcd->port_status[rhport] & (1 << USB_PORT_FEAT_RESET)) !=
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0 && time_after(jiffies, vhci_hcd->re_timeout)) {
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vhci_hcd->port_status[rhport] |= (1 << USB_PORT_FEAT_C_RESET);
|
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vhci_hcd->port_status[rhport] &= ~(1 << USB_PORT_FEAT_RESET);
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vhci_hcd->re_timeout = 0;
|
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|
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if (vhci_hcd->vdev[rhport].ud.status ==
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VDEV_ST_NOTASSIGNED) {
|
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usbip_dbg_vhci_rh(
|
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" enable rhport %d (status %u)\n",
|
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rhport,
|
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vhci_hcd->vdev[rhport].ud.status);
|
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vhci_hcd->port_status[rhport] |=
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USB_PORT_STAT_ENABLE;
|
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}
|
|
|
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if (hcd->speed < HCD_USB3) {
|
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switch (vhci_hcd->vdev[rhport].speed) {
|
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case USB_SPEED_HIGH:
|
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vhci_hcd->port_status[rhport] |=
|
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USB_PORT_STAT_HIGH_SPEED;
|
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break;
|
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case USB_SPEED_LOW:
|
|
vhci_hcd->port_status[rhport] |=
|
|
USB_PORT_STAT_LOW_SPEED;
|
|
break;
|
|
default:
|
|
pr_err("vhci_device speed not set\n");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
((__le16 *) buf)[0] = cpu_to_le16(vhci_hcd->port_status[rhport]);
|
|
((__le16 *) buf)[1] =
|
|
cpu_to_le16(vhci_hcd->port_status[rhport] >> 16);
|
|
|
|
usbip_dbg_vhci_rh(" GetPortStatus bye %x %x\n", ((u16 *)buf)[0],
|
|
((u16 *)buf)[1]);
|
|
break;
|
|
case SetHubFeature:
|
|
usbip_dbg_vhci_rh(" SetHubFeature\n");
|
|
retval = -EPIPE;
|
|
break;
|
|
case SetPortFeature:
|
|
switch (wValue) {
|
|
case USB_PORT_FEAT_LINK_STATE:
|
|
usbip_dbg_vhci_rh(
|
|
" SetPortFeature: USB_PORT_FEAT_LINK_STATE\n");
|
|
if (hcd->speed != HCD_USB3) {
|
|
pr_err("USB_PORT_FEAT_LINK_STATE req not "
|
|
"supported for USB 2.0 roothub\n");
|
|
goto error;
|
|
}
|
|
/*
|
|
* Since this is dummy we don't have an actual link so
|
|
* there is nothing to do for the SET_LINK_STATE cmd
|
|
*/
|
|
break;
|
|
case USB_PORT_FEAT_U1_TIMEOUT:
|
|
usbip_dbg_vhci_rh(
|
|
" SetPortFeature: USB_PORT_FEAT_U1_TIMEOUT\n");
|
|
case USB_PORT_FEAT_U2_TIMEOUT:
|
|
usbip_dbg_vhci_rh(
|
|
" SetPortFeature: USB_PORT_FEAT_U2_TIMEOUT\n");
|
|
/* TODO: add suspend/resume support! */
|
|
if (hcd->speed != HCD_USB3) {
|
|
pr_err("USB_PORT_FEAT_U1/2_TIMEOUT req not "
|
|
"supported for USB 2.0 roothub\n");
|
|
goto error;
|
|
}
|
|
break;
|
|
case USB_PORT_FEAT_SUSPEND:
|
|
usbip_dbg_vhci_rh(
|
|
" SetPortFeature: USB_PORT_FEAT_SUSPEND\n");
|
|
/* Applicable only for USB2.0 hub */
|
|
if (hcd->speed == HCD_USB3) {
|
|
pr_err("USB_PORT_FEAT_SUSPEND req not "
|
|
"supported for USB 3.0 roothub\n");
|
|
goto error;
|
|
}
|
|
|
|
vhci_hcd->port_status[rhport] |= USB_PORT_STAT_SUSPEND;
|
|
break;
|
|
case USB_PORT_FEAT_POWER:
|
|
usbip_dbg_vhci_rh(
|
|
" SetPortFeature: USB_PORT_FEAT_POWER\n");
|
|
if (hcd->speed == HCD_USB3)
|
|
vhci_hcd->port_status[rhport] |= USB_SS_PORT_STAT_POWER;
|
|
else
|
|
vhci_hcd->port_status[rhport] |= USB_PORT_STAT_POWER;
|
|
break;
|
|
case USB_PORT_FEAT_BH_PORT_RESET:
|
|
usbip_dbg_vhci_rh(
|
|
" SetPortFeature: USB_PORT_FEAT_BH_PORT_RESET\n");
|
|
/* Applicable only for USB3.0 hub */
|
|
if (hcd->speed != HCD_USB3) {
|
|
pr_err("USB_PORT_FEAT_BH_PORT_RESET req not "
|
|
"supported for USB 2.0 roothub\n");
|
|
goto error;
|
|
}
|
|
/* FALLS THROUGH */
|
|
case USB_PORT_FEAT_RESET:
|
|
usbip_dbg_vhci_rh(
|
|
" SetPortFeature: USB_PORT_FEAT_RESET\n");
|
|
/* if it's already enabled, disable */
|
|
if (hcd->speed == HCD_USB3) {
|
|
vhci_hcd->port_status[rhport] = 0;
|
|
vhci_hcd->port_status[rhport] =
|
|
(USB_SS_PORT_STAT_POWER |
|
|
USB_PORT_STAT_CONNECTION |
|
|
USB_PORT_STAT_RESET);
|
|
} else if (vhci_hcd->port_status[rhport] & USB_PORT_STAT_ENABLE) {
|
|
vhci_hcd->port_status[rhport] &= ~(USB_PORT_STAT_ENABLE
|
|
| USB_PORT_STAT_LOW_SPEED
|
|
| USB_PORT_STAT_HIGH_SPEED);
|
|
}
|
|
|
|
/* 50msec reset signaling */
|
|
vhci_hcd->re_timeout = jiffies + msecs_to_jiffies(50);
|
|
|
|
/* FALLS THROUGH */
|
|
default:
|
|
usbip_dbg_vhci_rh(" SetPortFeature: default %d\n",
|
|
wValue);
|
|
if (hcd->speed == HCD_USB3) {
|
|
if ((vhci_hcd->port_status[rhport] &
|
|
USB_SS_PORT_STAT_POWER) != 0) {
|
|
vhci_hcd->port_status[rhport] |= (1 << wValue);
|
|
}
|
|
} else
|
|
if ((vhci_hcd->port_status[rhport] &
|
|
USB_PORT_STAT_POWER) != 0) {
|
|
vhci_hcd->port_status[rhport] |= (1 << wValue);
|
|
}
|
|
}
|
|
break;
|
|
case GetPortErrorCount:
|
|
usbip_dbg_vhci_rh(" GetPortErrorCount\n");
|
|
if (hcd->speed != HCD_USB3) {
|
|
pr_err("GetPortErrorCount req not "
|
|
"supported for USB 2.0 roothub\n");
|
|
goto error;
|
|
}
|
|
/* We'll always return 0 since this is a dummy hub */
|
|
*(__le32 *) buf = cpu_to_le32(0);
|
|
break;
|
|
case SetHubDepth:
|
|
usbip_dbg_vhci_rh(" SetHubDepth\n");
|
|
if (hcd->speed != HCD_USB3) {
|
|
pr_err("SetHubDepth req not supported for "
|
|
"USB 2.0 roothub\n");
|
|
goto error;
|
|
}
|
|
break;
|
|
default:
|
|
pr_err("default hub control req: %04x v%04x i%04x l%d\n",
|
|
typeReq, wValue, wIndex, wLength);
|
|
error:
|
|
/* "protocol stall" on error */
|
|
retval = -EPIPE;
|
|
}
|
|
|
|
if (usbip_dbg_flag_vhci_rh) {
|
|
pr_debug("port %d\n", rhport);
|
|
/* Only dump valid port status */
|
|
if (rhport >= 0) {
|
|
dump_port_status_diff(prev_port_status[rhport],
|
|
vhci_hcd->port_status[rhport],
|
|
hcd->speed == HCD_USB3);
|
|
}
|
|
}
|
|
usbip_dbg_vhci_rh(" bye\n");
|
|
|
|
spin_unlock_irqrestore(&vhci->lock, flags);
|
|
|
|
if ((vhci_hcd->port_status[rhport] & PORT_C_MASK) != 0)
|
|
usb_hcd_poll_rh_status(hcd);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static void vhci_tx_urb(struct urb *urb, struct vhci_device *vdev)
|
|
{
|
|
struct vhci_priv *priv;
|
|
struct vhci_hcd *vhci_hcd;
|
|
unsigned long flags;
|
|
|
|
if (!vdev) {
|
|
pr_err("could not get virtual device");
|
|
return;
|
|
}
|
|
vhci_hcd = vdev_to_vhci_hcd(vdev);
|
|
|
|
priv = kzalloc(sizeof(struct vhci_priv), GFP_ATOMIC);
|
|
if (!priv) {
|
|
usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC);
|
|
return;
|
|
}
|
|
|
|
spin_lock_irqsave(&vdev->priv_lock, flags);
|
|
|
|
priv->seqnum = atomic_inc_return(&vhci_hcd->seqnum);
|
|
if (priv->seqnum == 0xffff)
|
|
dev_info(&urb->dev->dev, "seqnum max\n");
|
|
|
|
priv->vdev = vdev;
|
|
priv->urb = urb;
|
|
|
|
urb->hcpriv = (void *) priv;
|
|
|
|
list_add_tail(&priv->list, &vdev->priv_tx);
|
|
|
|
wake_up(&vdev->waitq_tx);
|
|
spin_unlock_irqrestore(&vdev->priv_lock, flags);
|
|
}
|
|
|
|
static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags)
|
|
{
|
|
struct vhci_hcd *vhci_hcd = hcd_to_vhci_hcd(hcd);
|
|
struct vhci *vhci = vhci_hcd->vhci;
|
|
struct device *dev = &urb->dev->dev;
|
|
u8 portnum = urb->dev->portnum;
|
|
int ret = 0;
|
|
struct vhci_device *vdev;
|
|
unsigned long flags;
|
|
|
|
usbip_dbg_vhci_hc("enter, usb_hcd %p urb %p mem_flags %d\n",
|
|
hcd, urb, mem_flags);
|
|
|
|
if (portnum > VHCI_HC_PORTS) {
|
|
pr_err("invalid port number %d\n", portnum);
|
|
return -ENODEV;
|
|
}
|
|
vdev = &vhci_hcd->vdev[portnum-1];
|
|
|
|
/* patch to usb_sg_init() is in 2.5.60 */
|
|
BUG_ON(!urb->transfer_buffer && urb->transfer_buffer_length);
|
|
|
|
spin_lock_irqsave(&vhci->lock, flags);
|
|
|
|
if (urb->status != -EINPROGRESS) {
|
|
dev_err(dev, "URB already unlinked!, status %d\n", urb->status);
|
|
spin_unlock_irqrestore(&vhci->lock, flags);
|
|
return urb->status;
|
|
}
|
|
|
|
/* refuse enqueue for dead connection */
|
|
spin_lock(&vdev->ud.lock);
|
|
if (vdev->ud.status == VDEV_ST_NULL ||
|
|
vdev->ud.status == VDEV_ST_ERROR) {
|
|
dev_err(dev, "enqueue for inactive port %d\n", vdev->rhport);
|
|
spin_unlock(&vdev->ud.lock);
|
|
spin_unlock_irqrestore(&vhci->lock, flags);
|
|
return -ENODEV;
|
|
}
|
|
spin_unlock(&vdev->ud.lock);
|
|
|
|
ret = usb_hcd_link_urb_to_ep(hcd, urb);
|
|
if (ret)
|
|
goto no_need_unlink;
|
|
|
|
/*
|
|
* The enumeration process is as follows;
|
|
*
|
|
* 1. Get_Descriptor request to DevAddrs(0) EndPoint(0)
|
|
* to get max packet length of default pipe
|
|
*
|
|
* 2. Set_Address request to DevAddr(0) EndPoint(0)
|
|
*
|
|
*/
|
|
if (usb_pipedevice(urb->pipe) == 0) {
|
|
__u8 type = usb_pipetype(urb->pipe);
|
|
struct usb_ctrlrequest *ctrlreq =
|
|
(struct usb_ctrlrequest *) urb->setup_packet;
|
|
|
|
if (type != PIPE_CONTROL || !ctrlreq) {
|
|
dev_err(dev, "invalid request to devnum 0\n");
|
|
ret = -EINVAL;
|
|
goto no_need_xmit;
|
|
}
|
|
|
|
switch (ctrlreq->bRequest) {
|
|
case USB_REQ_SET_ADDRESS:
|
|
/* set_address may come when a device is reset */
|
|
dev_info(dev, "SetAddress Request (%d) to port %d\n",
|
|
ctrlreq->wValue, vdev->rhport);
|
|
|
|
usb_put_dev(vdev->udev);
|
|
vdev->udev = usb_get_dev(urb->dev);
|
|
|
|
spin_lock(&vdev->ud.lock);
|
|
vdev->ud.status = VDEV_ST_USED;
|
|
spin_unlock(&vdev->ud.lock);
|
|
|
|
if (urb->status == -EINPROGRESS) {
|
|
/* This request is successfully completed. */
|
|
/* If not -EINPROGRESS, possibly unlinked. */
|
|
urb->status = 0;
|
|
}
|
|
|
|
goto no_need_xmit;
|
|
|
|
case USB_REQ_GET_DESCRIPTOR:
|
|
if (ctrlreq->wValue == cpu_to_le16(USB_DT_DEVICE << 8))
|
|
usbip_dbg_vhci_hc(
|
|
"Not yet?:Get_Descriptor to device 0 (get max pipe size)\n");
|
|
|
|
usb_put_dev(vdev->udev);
|
|
vdev->udev = usb_get_dev(urb->dev);
|
|
goto out;
|
|
|
|
default:
|
|
/* NOT REACHED */
|
|
dev_err(dev,
|
|
"invalid request to devnum 0 bRequest %u, wValue %u\n",
|
|
ctrlreq->bRequest,
|
|
ctrlreq->wValue);
|
|
ret = -EINVAL;
|
|
goto no_need_xmit;
|
|
}
|
|
|
|
}
|
|
|
|
out:
|
|
vhci_tx_urb(urb, vdev);
|
|
spin_unlock_irqrestore(&vhci->lock, flags);
|
|
|
|
return 0;
|
|
|
|
no_need_xmit:
|
|
usb_hcd_unlink_urb_from_ep(hcd, urb);
|
|
no_need_unlink:
|
|
spin_unlock_irqrestore(&vhci->lock, flags);
|
|
if (!ret)
|
|
usb_hcd_giveback_urb(hcd, urb, urb->status);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* vhci_rx gives back the urb after receiving the reply of the urb. If an
|
|
* unlink pdu is sent or not, vhci_rx receives a normal return pdu and gives
|
|
* back its urb. For the driver unlinking the urb, the content of the urb is
|
|
* not important, but the calling to its completion handler is important; the
|
|
* completion of unlinking is notified by the completion handler.
|
|
*
|
|
*
|
|
* CLIENT SIDE
|
|
*
|
|
* - When vhci_hcd receives RET_SUBMIT,
|
|
*
|
|
* - case 1a). the urb of the pdu is not unlinking.
|
|
* - normal case
|
|
* => just give back the urb
|
|
*
|
|
* - case 1b). the urb of the pdu is unlinking.
|
|
* - usbip.ko will return a reply of the unlinking request.
|
|
* => give back the urb now and go to case 2b).
|
|
*
|
|
* - When vhci_hcd receives RET_UNLINK,
|
|
*
|
|
* - case 2a). a submit request is still pending in vhci_hcd.
|
|
* - urb was really pending in usbip.ko and urb_unlink_urb() was
|
|
* completed there.
|
|
* => free a pending submit request
|
|
* => notify unlink completeness by giving back the urb
|
|
*
|
|
* - case 2b). a submit request is *not* pending in vhci_hcd.
|
|
* - urb was already given back to the core driver.
|
|
* => do not give back the urb
|
|
*
|
|
*
|
|
* SERVER SIDE
|
|
*
|
|
* - When usbip receives CMD_UNLINK,
|
|
*
|
|
* - case 3a). the urb of the unlink request is now in submission.
|
|
* => do usb_unlink_urb().
|
|
* => after the unlink is completed, send RET_UNLINK.
|
|
*
|
|
* - case 3b). the urb of the unlink request is not in submission.
|
|
* - may be already completed or never be received
|
|
* => send RET_UNLINK
|
|
*
|
|
*/
|
|
static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
|
|
{
|
|
struct vhci_hcd *vhci_hcd = hcd_to_vhci_hcd(hcd);
|
|
struct vhci *vhci = vhci_hcd->vhci;
|
|
struct vhci_priv *priv;
|
|
struct vhci_device *vdev;
|
|
unsigned long flags;
|
|
|
|
pr_info("dequeue a urb %p\n", urb);
|
|
|
|
spin_lock_irqsave(&vhci->lock, flags);
|
|
|
|
priv = urb->hcpriv;
|
|
if (!priv) {
|
|
/* URB was never linked! or will be soon given back by
|
|
* vhci_rx. */
|
|
spin_unlock_irqrestore(&vhci->lock, flags);
|
|
return -EIDRM;
|
|
}
|
|
|
|
{
|
|
int ret = 0;
|
|
|
|
ret = usb_hcd_check_unlink_urb(hcd, urb, status);
|
|
if (ret) {
|
|
spin_unlock_irqrestore(&vhci->lock, flags);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* send unlink request here? */
|
|
vdev = priv->vdev;
|
|
|
|
if (!vdev->ud.tcp_socket) {
|
|
/* tcp connection is closed */
|
|
spin_lock(&vdev->priv_lock);
|
|
|
|
pr_info("device %p seems to be disconnected\n", vdev);
|
|
list_del(&priv->list);
|
|
kfree(priv);
|
|
urb->hcpriv = NULL;
|
|
|
|
spin_unlock(&vdev->priv_lock);
|
|
|
|
/*
|
|
* If tcp connection is alive, we have sent CMD_UNLINK.
|
|
* vhci_rx will receive RET_UNLINK and give back the URB.
|
|
* Otherwise, we give back it here.
|
|
*/
|
|
pr_info("gives back urb %p\n", urb);
|
|
|
|
usb_hcd_unlink_urb_from_ep(hcd, urb);
|
|
|
|
spin_unlock_irqrestore(&vhci->lock, flags);
|
|
usb_hcd_giveback_urb(hcd, urb, urb->status);
|
|
spin_lock_irqsave(&vhci->lock, flags);
|
|
|
|
} else {
|
|
/* tcp connection is alive */
|
|
struct vhci_unlink *unlink;
|
|
|
|
spin_lock(&vdev->priv_lock);
|
|
|
|
/* setup CMD_UNLINK pdu */
|
|
unlink = kzalloc(sizeof(struct vhci_unlink), GFP_ATOMIC);
|
|
if (!unlink) {
|
|
spin_unlock(&vdev->priv_lock);
|
|
spin_unlock_irqrestore(&vhci->lock, flags);
|
|
usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
unlink->seqnum = atomic_inc_return(&vhci_hcd->seqnum);
|
|
if (unlink->seqnum == 0xffff)
|
|
pr_info("seqnum max\n");
|
|
|
|
unlink->unlink_seqnum = priv->seqnum;
|
|
|
|
pr_info("device %p seems to be still connected\n", vdev);
|
|
|
|
/* send cmd_unlink and try to cancel the pending URB in the
|
|
* peer */
|
|
list_add_tail(&unlink->list, &vdev->unlink_tx);
|
|
wake_up(&vdev->waitq_tx);
|
|
|
|
spin_unlock(&vdev->priv_lock);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&vhci->lock, flags);
|
|
|
|
usbip_dbg_vhci_hc("leave\n");
|
|
return 0;
|
|
}
|
|
|
|
static void vhci_device_unlink_cleanup(struct vhci_device *vdev)
|
|
{
|
|
struct vhci_hcd *vhci_hcd = vdev_to_vhci_hcd(vdev);
|
|
struct usb_hcd *hcd = vhci_hcd_to_hcd(vhci_hcd);
|
|
struct vhci *vhci = vhci_hcd->vhci;
|
|
struct vhci_unlink *unlink, *tmp;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&vhci->lock, flags);
|
|
spin_lock(&vdev->priv_lock);
|
|
|
|
list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) {
|
|
pr_info("unlink cleanup tx %lu\n", unlink->unlink_seqnum);
|
|
list_del(&unlink->list);
|
|
kfree(unlink);
|
|
}
|
|
|
|
while (!list_empty(&vdev->unlink_rx)) {
|
|
struct urb *urb;
|
|
|
|
unlink = list_first_entry(&vdev->unlink_rx, struct vhci_unlink,
|
|
list);
|
|
|
|
/* give back URB of unanswered unlink request */
|
|
pr_info("unlink cleanup rx %lu\n", unlink->unlink_seqnum);
|
|
|
|
urb = pickup_urb_and_free_priv(vdev, unlink->unlink_seqnum);
|
|
if (!urb) {
|
|
pr_info("the urb (seqnum %lu) was already given back\n",
|
|
unlink->unlink_seqnum);
|
|
list_del(&unlink->list);
|
|
kfree(unlink);
|
|
continue;
|
|
}
|
|
|
|
urb->status = -ENODEV;
|
|
|
|
usb_hcd_unlink_urb_from_ep(hcd, urb);
|
|
|
|
list_del(&unlink->list);
|
|
|
|
spin_unlock(&vdev->priv_lock);
|
|
spin_unlock_irqrestore(&vhci->lock, flags);
|
|
|
|
usb_hcd_giveback_urb(hcd, urb, urb->status);
|
|
|
|
spin_lock_irqsave(&vhci->lock, flags);
|
|
spin_lock(&vdev->priv_lock);
|
|
|
|
kfree(unlink);
|
|
}
|
|
|
|
spin_unlock(&vdev->priv_lock);
|
|
spin_unlock_irqrestore(&vhci->lock, flags);
|
|
}
|
|
|
|
/*
|
|
* The important thing is that only one context begins cleanup.
|
|
* This is why error handling and cleanup become simple.
|
|
* We do not want to consider race condition as possible.
|
|
*/
|
|
static void vhci_shutdown_connection(struct usbip_device *ud)
|
|
{
|
|
struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
|
|
|
|
/* need this? see stub_dev.c */
|
|
if (ud->tcp_socket) {
|
|
pr_debug("shutdown tcp_socket %p\n", ud->tcp_socket);
|
|
kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR);
|
|
}
|
|
|
|
/* kill threads related to this sdev */
|
|
if (vdev->ud.tcp_rx) {
|
|
kthread_stop_put(vdev->ud.tcp_rx);
|
|
vdev->ud.tcp_rx = NULL;
|
|
}
|
|
if (vdev->ud.tcp_tx) {
|
|
kthread_stop_put(vdev->ud.tcp_tx);
|
|
vdev->ud.tcp_tx = NULL;
|
|
}
|
|
pr_info("stop threads\n");
|
|
|
|
/* active connection is closed */
|
|
if (vdev->ud.tcp_socket) {
|
|
sockfd_put(vdev->ud.tcp_socket);
|
|
vdev->ud.tcp_socket = NULL;
|
|
}
|
|
pr_info("release socket\n");
|
|
|
|
vhci_device_unlink_cleanup(vdev);
|
|
|
|
/*
|
|
* rh_port_disconnect() is a trigger of ...
|
|
* usb_disable_device():
|
|
* disable all the endpoints for a USB device.
|
|
* usb_disable_endpoint():
|
|
* disable endpoints. pending urbs are unlinked(dequeued).
|
|
*
|
|
* NOTE: After calling rh_port_disconnect(), the USB device drivers of a
|
|
* detached device should release used urbs in a cleanup function (i.e.
|
|
* xxx_disconnect()). Therefore, vhci_hcd does not need to release
|
|
* pushed urbs and their private data in this function.
|
|
*
|
|
* NOTE: vhci_dequeue() must be considered carefully. When shutting down
|
|
* a connection, vhci_shutdown_connection() expects vhci_dequeue()
|
|
* gives back pushed urbs and frees their private data by request of
|
|
* the cleanup function of a USB driver. When unlinking a urb with an
|
|
* active connection, vhci_dequeue() does not give back the urb which
|
|
* is actually given back by vhci_rx after receiving its return pdu.
|
|
*
|
|
*/
|
|
rh_port_disconnect(vdev);
|
|
|
|
pr_info("disconnect device\n");
|
|
}
|
|
|
|
static void vhci_device_reset(struct usbip_device *ud)
|
|
{
|
|
struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&ud->lock, flags);
|
|
|
|
vdev->speed = 0;
|
|
vdev->devid = 0;
|
|
|
|
usb_put_dev(vdev->udev);
|
|
vdev->udev = NULL;
|
|
|
|
if (ud->tcp_socket) {
|
|
sockfd_put(ud->tcp_socket);
|
|
ud->tcp_socket = NULL;
|
|
}
|
|
ud->status = VDEV_ST_NULL;
|
|
|
|
spin_unlock_irqrestore(&ud->lock, flags);
|
|
}
|
|
|
|
static void vhci_device_unusable(struct usbip_device *ud)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&ud->lock, flags);
|
|
ud->status = VDEV_ST_ERROR;
|
|
spin_unlock_irqrestore(&ud->lock, flags);
|
|
}
|
|
|
|
static void vhci_device_init(struct vhci_device *vdev)
|
|
{
|
|
memset(vdev, 0, sizeof(struct vhci_device));
|
|
|
|
vdev->ud.side = USBIP_VHCI;
|
|
vdev->ud.status = VDEV_ST_NULL;
|
|
spin_lock_init(&vdev->ud.lock);
|
|
|
|
INIT_LIST_HEAD(&vdev->priv_rx);
|
|
INIT_LIST_HEAD(&vdev->priv_tx);
|
|
INIT_LIST_HEAD(&vdev->unlink_tx);
|
|
INIT_LIST_HEAD(&vdev->unlink_rx);
|
|
spin_lock_init(&vdev->priv_lock);
|
|
|
|
init_waitqueue_head(&vdev->waitq_tx);
|
|
|
|
vdev->ud.eh_ops.shutdown = vhci_shutdown_connection;
|
|
vdev->ud.eh_ops.reset = vhci_device_reset;
|
|
vdev->ud.eh_ops.unusable = vhci_device_unusable;
|
|
|
|
usbip_start_eh(&vdev->ud);
|
|
}
|
|
|
|
static int hcd_name_to_id(const char *name)
|
|
{
|
|
char *c;
|
|
long val;
|
|
int ret;
|
|
|
|
c = strchr(name, '.');
|
|
if (c == NULL)
|
|
return 0;
|
|
|
|
ret = kstrtol(c+1, 10, &val);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return val;
|
|
}
|
|
|
|
static int vhci_setup(struct usb_hcd *hcd)
|
|
{
|
|
struct vhci *vhci = *((void **)dev_get_platdata(hcd->self.controller));
|
|
hcd->self.sg_tablesize = ~0;
|
|
if (usb_hcd_is_primary_hcd(hcd)) {
|
|
vhci->vhci_hcd_hs = hcd_to_vhci_hcd(hcd);
|
|
vhci->vhci_hcd_hs->vhci = vhci;
|
|
/*
|
|
* Mark the first roothub as being USB 2.0.
|
|
* The USB 3.0 roothub will be registered later by
|
|
* vhci_hcd_probe()
|
|
*/
|
|
hcd->speed = HCD_USB2;
|
|
hcd->self.root_hub->speed = USB_SPEED_HIGH;
|
|
} else {
|
|
vhci->vhci_hcd_ss = hcd_to_vhci_hcd(hcd);
|
|
vhci->vhci_hcd_ss->vhci = vhci;
|
|
hcd->speed = HCD_USB3;
|
|
hcd->self.root_hub->speed = USB_SPEED_SUPER;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int vhci_start(struct usb_hcd *hcd)
|
|
{
|
|
struct vhci_hcd *vhci_hcd = hcd_to_vhci_hcd(hcd);
|
|
int id, rhport;
|
|
int err;
|
|
|
|
usbip_dbg_vhci_hc("enter vhci_start\n");
|
|
|
|
if (usb_hcd_is_primary_hcd(hcd))
|
|
spin_lock_init(&vhci_hcd->vhci->lock);
|
|
|
|
/* initialize private data of usb_hcd */
|
|
|
|
for (rhport = 0; rhport < VHCI_HC_PORTS; rhport++) {
|
|
struct vhci_device *vdev = &vhci_hcd->vdev[rhport];
|
|
|
|
vhci_device_init(vdev);
|
|
vdev->rhport = rhport;
|
|
}
|
|
|
|
atomic_set(&vhci_hcd->seqnum, 0);
|
|
|
|
hcd->power_budget = 0; /* no limit */
|
|
hcd->uses_new_polling = 1;
|
|
|
|
#ifdef CONFIG_USB_OTG
|
|
hcd->self.otg_port = 1;
|
|
#endif
|
|
|
|
id = hcd_name_to_id(hcd_name(hcd));
|
|
if (id < 0) {
|
|
pr_err("invalid vhci name %s\n", hcd_name(hcd));
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* vhci_hcd is now ready to be controlled through sysfs */
|
|
if (id == 0 && usb_hcd_is_primary_hcd(hcd)) {
|
|
err = vhci_init_attr_group();
|
|
if (err) {
|
|
pr_err("init attr group\n");
|
|
return err;
|
|
}
|
|
err = sysfs_create_group(&hcd_dev(hcd)->kobj, &vhci_attr_group);
|
|
if (err) {
|
|
pr_err("create sysfs files\n");
|
|
vhci_finish_attr_group();
|
|
return err;
|
|
}
|
|
pr_info("created sysfs %s\n", hcd_name(hcd));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void vhci_stop(struct usb_hcd *hcd)
|
|
{
|
|
struct vhci_hcd *vhci_hcd = hcd_to_vhci_hcd(hcd);
|
|
int id, rhport;
|
|
|
|
usbip_dbg_vhci_hc("stop VHCI controller\n");
|
|
|
|
/* 1. remove the userland interface of vhci_hcd */
|
|
id = hcd_name_to_id(hcd_name(hcd));
|
|
if (id == 0 && usb_hcd_is_primary_hcd(hcd)) {
|
|
sysfs_remove_group(&hcd_dev(hcd)->kobj, &vhci_attr_group);
|
|
vhci_finish_attr_group();
|
|
}
|
|
|
|
/* 2. shutdown all the ports of vhci_hcd */
|
|
for (rhport = 0; rhport < VHCI_HC_PORTS; rhport++) {
|
|
struct vhci_device *vdev = &vhci_hcd->vdev[rhport];
|
|
|
|
usbip_event_add(&vdev->ud, VDEV_EVENT_REMOVED);
|
|
usbip_stop_eh(&vdev->ud);
|
|
}
|
|
}
|
|
|
|
static int vhci_get_frame_number(struct usb_hcd *hcd)
|
|
{
|
|
dev_err_ratelimited(&hcd->self.root_hub->dev, "Not yet implemented\n");
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
/* FIXME: suspend/resume */
|
|
static int vhci_bus_suspend(struct usb_hcd *hcd)
|
|
{
|
|
struct vhci *vhci = *((void **)dev_get_platdata(hcd->self.controller));
|
|
unsigned long flags;
|
|
|
|
dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
|
|
|
|
spin_lock_irqsave(&vhci->lock, flags);
|
|
hcd->state = HC_STATE_SUSPENDED;
|
|
spin_unlock_irqrestore(&vhci->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vhci_bus_resume(struct usb_hcd *hcd)
|
|
{
|
|
struct vhci *vhci = *((void **)dev_get_platdata(hcd->self.controller));
|
|
int rc = 0;
|
|
unsigned long flags;
|
|
|
|
dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
|
|
|
|
spin_lock_irqsave(&vhci->lock, flags);
|
|
if (!HCD_HW_ACCESSIBLE(hcd))
|
|
rc = -ESHUTDOWN;
|
|
else
|
|
hcd->state = HC_STATE_RUNNING;
|
|
spin_unlock_irqrestore(&vhci->lock, flags);
|
|
|
|
return rc;
|
|
}
|
|
|
|
#else
|
|
|
|
#define vhci_bus_suspend NULL
|
|
#define vhci_bus_resume NULL
|
|
#endif
|
|
|
|
/* Change a group of bulk endpoints to support multiple stream IDs */
|
|
static int vhci_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev,
|
|
struct usb_host_endpoint **eps, unsigned int num_eps,
|
|
unsigned int num_streams, gfp_t mem_flags)
|
|
{
|
|
dev_dbg(&hcd->self.root_hub->dev, "vhci_alloc_streams not implemented\n");
|
|
return 0;
|
|
}
|
|
|
|
/* Reverts a group of bulk endpoints back to not using stream IDs. */
|
|
static int vhci_free_streams(struct usb_hcd *hcd, struct usb_device *udev,
|
|
struct usb_host_endpoint **eps, unsigned int num_eps,
|
|
gfp_t mem_flags)
|
|
{
|
|
dev_dbg(&hcd->self.root_hub->dev, "vhci_free_streams not implemented\n");
|
|
return 0;
|
|
}
|
|
|
|
static struct hc_driver vhci_hc_driver = {
|
|
.description = driver_name,
|
|
.product_desc = driver_desc,
|
|
.hcd_priv_size = sizeof(struct vhci_hcd),
|
|
|
|
.flags = HCD_USB3 | HCD_SHARED,
|
|
|
|
.reset = vhci_setup,
|
|
.start = vhci_start,
|
|
.stop = vhci_stop,
|
|
|
|
.urb_enqueue = vhci_urb_enqueue,
|
|
.urb_dequeue = vhci_urb_dequeue,
|
|
|
|
.get_frame_number = vhci_get_frame_number,
|
|
|
|
.hub_status_data = vhci_hub_status,
|
|
.hub_control = vhci_hub_control,
|
|
.bus_suspend = vhci_bus_suspend,
|
|
.bus_resume = vhci_bus_resume,
|
|
|
|
.alloc_streams = vhci_alloc_streams,
|
|
.free_streams = vhci_free_streams,
|
|
};
|
|
|
|
static int vhci_hcd_probe(struct platform_device *pdev)
|
|
{
|
|
struct vhci *vhci = *((void **)dev_get_platdata(&pdev->dev));
|
|
struct usb_hcd *hcd_hs;
|
|
struct usb_hcd *hcd_ss;
|
|
int ret;
|
|
|
|
usbip_dbg_vhci_hc("name %s id %d\n", pdev->name, pdev->id);
|
|
|
|
/*
|
|
* Allocate and initialize hcd.
|
|
* Our private data is also allocated automatically.
|
|
*/
|
|
hcd_hs = usb_create_hcd(&vhci_hc_driver, &pdev->dev, dev_name(&pdev->dev));
|
|
if (!hcd_hs) {
|
|
pr_err("create primary hcd failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
hcd_hs->has_tt = 1;
|
|
|
|
/*
|
|
* Finish generic HCD structure initialization and register.
|
|
* Call the driver's reset() and start() routines.
|
|
*/
|
|
ret = usb_add_hcd(hcd_hs, 0, 0);
|
|
if (ret != 0) {
|
|
pr_err("usb_add_hcd hs failed %d\n", ret);
|
|
goto put_usb2_hcd;
|
|
}
|
|
|
|
hcd_ss = usb_create_shared_hcd(&vhci_hc_driver, &pdev->dev,
|
|
dev_name(&pdev->dev), hcd_hs);
|
|
if (!hcd_ss) {
|
|
ret = -ENOMEM;
|
|
pr_err("create shared hcd failed\n");
|
|
goto remove_usb2_hcd;
|
|
}
|
|
|
|
ret = usb_add_hcd(hcd_ss, 0, 0);
|
|
if (ret) {
|
|
pr_err("usb_add_hcd ss failed %d\n", ret);
|
|
goto put_usb3_hcd;
|
|
}
|
|
|
|
usbip_dbg_vhci_hc("bye\n");
|
|
return 0;
|
|
|
|
put_usb3_hcd:
|
|
usb_put_hcd(hcd_ss);
|
|
remove_usb2_hcd:
|
|
usb_remove_hcd(hcd_hs);
|
|
put_usb2_hcd:
|
|
usb_put_hcd(hcd_hs);
|
|
vhci->vhci_hcd_hs = NULL;
|
|
vhci->vhci_hcd_ss = NULL;
|
|
return ret;
|
|
}
|
|
|
|
static int vhci_hcd_remove(struct platform_device *pdev)
|
|
{
|
|
struct vhci *vhci = *((void **)dev_get_platdata(&pdev->dev));
|
|
|
|
/*
|
|
* Disconnects the root hub,
|
|
* then reverses the effects of usb_add_hcd(),
|
|
* invoking the HCD's stop() methods.
|
|
*/
|
|
usb_remove_hcd(vhci_hcd_to_hcd(vhci->vhci_hcd_ss));
|
|
usb_put_hcd(vhci_hcd_to_hcd(vhci->vhci_hcd_ss));
|
|
|
|
usb_remove_hcd(vhci_hcd_to_hcd(vhci->vhci_hcd_hs));
|
|
usb_put_hcd(vhci_hcd_to_hcd(vhci->vhci_hcd_hs));
|
|
|
|
vhci->vhci_hcd_hs = NULL;
|
|
vhci->vhci_hcd_ss = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
/* what should happen for USB/IP under suspend/resume? */
|
|
static int vhci_hcd_suspend(struct platform_device *pdev, pm_message_t state)
|
|
{
|
|
struct usb_hcd *hcd;
|
|
struct vhci *vhci;
|
|
int rhport;
|
|
int connected = 0;
|
|
int ret = 0;
|
|
unsigned long flags;
|
|
|
|
dev_dbg(&pdev->dev, "%s\n", __func__);
|
|
|
|
hcd = platform_get_drvdata(pdev);
|
|
if (!hcd)
|
|
return 0;
|
|
|
|
vhci = *((void **)dev_get_platdata(hcd->self.controller));
|
|
|
|
spin_lock_irqsave(&vhci->lock, flags);
|
|
|
|
for (rhport = 0; rhport < VHCI_HC_PORTS; rhport++) {
|
|
if (vhci->vhci_hcd_hs->port_status[rhport] &
|
|
USB_PORT_STAT_CONNECTION)
|
|
connected += 1;
|
|
|
|
if (vhci->vhci_hcd_ss->port_status[rhport] &
|
|
USB_PORT_STAT_CONNECTION)
|
|
connected += 1;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&vhci->lock, flags);
|
|
|
|
if (connected > 0) {
|
|
dev_info(&pdev->dev,
|
|
"We have %d active connection%s. Do not suspend.\n",
|
|
connected, (connected == 1 ? "" : "s"));
|
|
ret = -EBUSY;
|
|
} else {
|
|
dev_info(&pdev->dev, "suspend vhci_hcd");
|
|
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int vhci_hcd_resume(struct platform_device *pdev)
|
|
{
|
|
struct usb_hcd *hcd;
|
|
|
|
dev_dbg(&pdev->dev, "%s\n", __func__);
|
|
|
|
hcd = platform_get_drvdata(pdev);
|
|
if (!hcd)
|
|
return 0;
|
|
set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
|
|
usb_hcd_poll_rh_status(hcd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
|
|
#define vhci_hcd_suspend NULL
|
|
#define vhci_hcd_resume NULL
|
|
|
|
#endif
|
|
|
|
static struct platform_driver vhci_driver = {
|
|
.probe = vhci_hcd_probe,
|
|
.remove = vhci_hcd_remove,
|
|
.suspend = vhci_hcd_suspend,
|
|
.resume = vhci_hcd_resume,
|
|
.driver = {
|
|
.name = driver_name,
|
|
},
|
|
};
|
|
|
|
static void del_platform_devices(void)
|
|
{
|
|
struct platform_device *pdev;
|
|
int i;
|
|
|
|
for (i = 0; i < vhci_num_controllers; i++) {
|
|
pdev = vhcis[i].pdev;
|
|
if (pdev != NULL)
|
|
platform_device_unregister(pdev);
|
|
vhcis[i].pdev = NULL;
|
|
}
|
|
sysfs_remove_link(&platform_bus.kobj, driver_name);
|
|
}
|
|
|
|
static int __init vhci_hcd_init(void)
|
|
{
|
|
int i, ret;
|
|
|
|
if (usb_disabled())
|
|
return -ENODEV;
|
|
|
|
if (vhci_num_controllers < 1)
|
|
vhci_num_controllers = 1;
|
|
|
|
vhcis = kcalloc(vhci_num_controllers, sizeof(struct vhci), GFP_KERNEL);
|
|
if (vhcis == NULL)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < vhci_num_controllers; i++) {
|
|
vhcis[i].pdev = platform_device_alloc(driver_name, i);
|
|
if (!vhcis[i].pdev) {
|
|
i--;
|
|
while (i >= 0)
|
|
platform_device_put(vhcis[i--].pdev);
|
|
ret = -ENOMEM;
|
|
goto err_device_alloc;
|
|
}
|
|
}
|
|
for (i = 0; i < vhci_num_controllers; i++) {
|
|
void *vhci = &vhcis[i];
|
|
ret = platform_device_add_data(vhcis[i].pdev, &vhci, sizeof(void *));
|
|
if (ret)
|
|
goto err_driver_register;
|
|
}
|
|
|
|
ret = platform_driver_register(&vhci_driver);
|
|
if (ret)
|
|
goto err_driver_register;
|
|
|
|
for (i = 0; i < vhci_num_controllers; i++) {
|
|
ret = platform_device_add(vhcis[i].pdev);
|
|
if (ret < 0) {
|
|
i--;
|
|
while (i >= 0)
|
|
platform_device_del(vhcis[i--].pdev);
|
|
goto err_add_hcd;
|
|
}
|
|
}
|
|
|
|
pr_info(DRIVER_DESC " v" USBIP_VERSION "\n");
|
|
return ret;
|
|
|
|
err_add_hcd:
|
|
platform_driver_unregister(&vhci_driver);
|
|
err_driver_register:
|
|
for (i = 0; i < vhci_num_controllers; i++)
|
|
platform_device_put(vhcis[i].pdev);
|
|
err_device_alloc:
|
|
kfree(vhcis);
|
|
return ret;
|
|
}
|
|
|
|
static void __exit vhci_hcd_exit(void)
|
|
{
|
|
del_platform_devices();
|
|
platform_driver_unregister(&vhci_driver);
|
|
kfree(vhcis);
|
|
}
|
|
|
|
module_init(vhci_hcd_init);
|
|
module_exit(vhci_hcd_exit);
|
|
|
|
MODULE_AUTHOR(DRIVER_AUTHOR);
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION(USBIP_VERSION);
|