| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Copyright (C) 2003-2008 Takahiro Hirofuchi |
| * Copyright (C) 2015-2016 Nobuo Iwata |
| */ |
| |
| #include <linux/init.h> |
| #include <linux/file.h> |
| #include <linux/kernel.h> |
| #include <linux/kthread.h> |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/slab.h> |
| |
| #include "usbip_common.h" |
| #include "vhci.h" |
| |
| #define DRIVER_AUTHOR "Takahiro Hirofuchi" |
| #define DRIVER_DESC "USB/IP 'Virtual' Host Controller (VHCI) Driver" |
| |
| /* |
| * TODO |
| * - update root hub emulation |
| * - move the emulation code to userland ? |
| * porting to other operating systems |
| * minimize kernel code |
| * - add suspend/resume code |
| * - clean up everything |
| */ |
| |
| /* See usb gadget dummy hcd */ |
| |
| static int vhci_hub_status(struct usb_hcd *hcd, char *buff); |
| static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, |
| u16 wIndex, char *buff, u16 wLength); |
| static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, |
| gfp_t mem_flags); |
| static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status); |
| static int vhci_start(struct usb_hcd *vhci_hcd); |
| static void vhci_stop(struct usb_hcd *hcd); |
| static int vhci_get_frame_number(struct usb_hcd *hcd); |
| |
| static const char driver_name[] = "vhci_hcd"; |
| static const char driver_desc[] = "USB/IP Virtual Host Controller"; |
| |
| int vhci_num_controllers = VHCI_NR_HCS; |
| struct vhci *vhcis; |
| |
| static const char * const bit_desc[] = { |
| "CONNECTION", /*0*/ |
| "ENABLE", /*1*/ |
| "SUSPEND", /*2*/ |
| "OVER_CURRENT", /*3*/ |
| "RESET", /*4*/ |
| "L1", /*5*/ |
| "R6", /*6*/ |
| "R7", /*7*/ |
| "POWER", /*8*/ |
| "LOWSPEED", /*9*/ |
| "HIGHSPEED", /*10*/ |
| "PORT_TEST", /*11*/ |
| "INDICATOR", /*12*/ |
| "R13", /*13*/ |
| "R14", /*14*/ |
| "R15", /*15*/ |
| "C_CONNECTION", /*16*/ |
| "C_ENABLE", /*17*/ |
| "C_SUSPEND", /*18*/ |
| "C_OVER_CURRENT", /*19*/ |
| "C_RESET", /*20*/ |
| "C_L1", /*21*/ |
| "R22", /*22*/ |
| "R23", /*23*/ |
| "R24", /*24*/ |
| "R25", /*25*/ |
| "R26", /*26*/ |
| "R27", /*27*/ |
| "R28", /*28*/ |
| "R29", /*29*/ |
| "R30", /*30*/ |
| "R31", /*31*/ |
| }; |
| |
| static const char * const bit_desc_ss[] = { |
| "CONNECTION", /*0*/ |
| "ENABLE", /*1*/ |
| "SUSPEND", /*2*/ |
| "OVER_CURRENT", /*3*/ |
| "RESET", /*4*/ |
| "L1", /*5*/ |
| "R6", /*6*/ |
| "R7", /*7*/ |
| "R8", /*8*/ |
| "POWER", /*9*/ |
| "HIGHSPEED", /*10*/ |
| "PORT_TEST", /*11*/ |
| "INDICATOR", /*12*/ |
| "R13", /*13*/ |
| "R14", /*14*/ |
| "R15", /*15*/ |
| "C_CONNECTION", /*16*/ |
| "C_ENABLE", /*17*/ |
| "C_SUSPEND", /*18*/ |
| "C_OVER_CURRENT", /*19*/ |
| "C_RESET", /*20*/ |
| "C_BH_RESET", /*21*/ |
| "C_LINK_STATE", /*22*/ |
| "C_CONFIG_ERROR", /*23*/ |
| "R24", /*24*/ |
| "R25", /*25*/ |
| "R26", /*26*/ |
| "R27", /*27*/ |
| "R28", /*28*/ |
| "R29", /*29*/ |
| "R30", /*30*/ |
| "R31", /*31*/ |
| }; |
| |
| static void dump_port_status_diff(u32 prev_status, u32 new_status, bool usb3) |
| { |
| int i = 0; |
| u32 bit = 1; |
| const char * const *desc = bit_desc; |
| |
| if (usb3) |
| desc = bit_desc_ss; |
| |
| pr_debug("status prev -> new: %08x -> %08x\n", prev_status, new_status); |
| while (bit) { |
| u32 prev = prev_status & bit; |
| u32 new = new_status & bit; |
| char change; |
| |
| if (!prev && new) |
| change = '+'; |
| else if (prev && !new) |
| change = '-'; |
| else |
| change = ' '; |
| |
| if (prev || new) { |
| pr_debug(" %c%s\n", change, desc[i]); |
| |
| if (bit == 1) /* USB_PORT_STAT_CONNECTION */ |
| pr_debug(" %c%s\n", change, "USB_PORT_STAT_SPEED_5GBPS"); |
| } |
| bit <<= 1; |
| i++; |
| } |
| pr_debug("\n"); |
| } |
| |
| void rh_port_connect(struct vhci_device *vdev, enum usb_device_speed speed) |
| { |
| struct vhci_hcd *vhci_hcd = vdev_to_vhci_hcd(vdev); |
| struct vhci *vhci = vhci_hcd->vhci; |
| int rhport = vdev->rhport; |
| u32 status; |
| unsigned long flags; |
| |
| usbip_dbg_vhci_rh("rh_port_connect %d\n", rhport); |
| |
| spin_lock_irqsave(&vhci->lock, flags); |
| |
| status = vhci_hcd->port_status[rhport]; |
| |
| status |= USB_PORT_STAT_CONNECTION | (1 << USB_PORT_FEAT_C_CONNECTION); |
| |
| switch (speed) { |
| case USB_SPEED_HIGH: |
| status |= USB_PORT_STAT_HIGH_SPEED; |
| break; |
| case USB_SPEED_LOW: |
| status |= USB_PORT_STAT_LOW_SPEED; |
| break; |
| default: |
| break; |
| } |
| |
| vhci_hcd->port_status[rhport] = status; |
| |
| spin_unlock_irqrestore(&vhci->lock, flags); |
| |
| usb_hcd_poll_rh_status(vhci_hcd_to_hcd(vhci_hcd)); |
| } |
| |
| static void rh_port_disconnect(struct vhci_device *vdev) |
| { |
| struct vhci_hcd *vhci_hcd = vdev_to_vhci_hcd(vdev); |
| struct vhci *vhci = vhci_hcd->vhci; |
| int rhport = vdev->rhport; |
| u32 status; |
| unsigned long flags; |
| |
| usbip_dbg_vhci_rh("rh_port_disconnect %d\n", rhport); |
| |
| spin_lock_irqsave(&vhci->lock, flags); |
| |
| status = vhci_hcd->port_status[rhport]; |
| |
| status &= ~USB_PORT_STAT_CONNECTION; |
| status |= (1 << USB_PORT_FEAT_C_CONNECTION); |
| |
| vhci_hcd->port_status[rhport] = status; |
| |
| spin_unlock_irqrestore(&vhci->lock, flags); |
| usb_hcd_poll_rh_status(vhci_hcd_to_hcd(vhci_hcd)); |
| } |
| |
| #define PORT_C_MASK \ |
| ((USB_PORT_STAT_C_CONNECTION \ |
| | USB_PORT_STAT_C_ENABLE \ |
| | USB_PORT_STAT_C_SUSPEND \ |
| | USB_PORT_STAT_C_OVERCURRENT \ |
| | USB_PORT_STAT_C_RESET) << 16) |
| |
| /* |
| * Returns 0 if the status hasn't changed, or the number of bytes in buf. |
| * Ports are 0-indexed from the HCD point of view, |
| * and 1-indexed from the USB core pointer of view. |
| * |
| * @buf: a bitmap to show which port status has been changed. |
| * bit 0: reserved |
| * bit 1: the status of port 0 has been changed. |
| * bit 2: the status of port 1 has been changed. |
| * ... |
| */ |
| static int vhci_hub_status(struct usb_hcd *hcd, char *buf) |
| { |
| struct vhci_hcd *vhci_hcd = hcd_to_vhci_hcd(hcd); |
| struct vhci *vhci = vhci_hcd->vhci; |
| int retval = DIV_ROUND_UP(VHCI_HC_PORTS + 1, 8); |
| int rhport; |
| int changed = 0; |
| unsigned long flags; |
| |
| memset(buf, 0, retval); |
| |
| spin_lock_irqsave(&vhci->lock, flags); |
| if (!HCD_HW_ACCESSIBLE(hcd)) { |
| usbip_dbg_vhci_rh("hw accessible flag not on?\n"); |
| goto done; |
| } |
| |
| /* check pseudo status register for each port */ |
| for (rhport = 0; rhport < VHCI_HC_PORTS; rhport++) { |
| if ((vhci_hcd->port_status[rhport] & PORT_C_MASK)) { |
| /* The status of a port has been changed, */ |
| usbip_dbg_vhci_rh("port %d status changed\n", rhport); |
| |
| buf[(rhport + 1) / 8] |= 1 << (rhport + 1) % 8; |
| changed = 1; |
| } |
| } |
| |
| if ((hcd->state == HC_STATE_SUSPENDED) && (changed == 1)) |
| usb_hcd_resume_root_hub(hcd); |
| |
| done: |
| spin_unlock_irqrestore(&vhci->lock, flags); |
| return changed ? retval : 0; |
| } |
| |
| /* usb 3.0 root hub device descriptor */ |
| static struct { |
| struct usb_bos_descriptor bos; |
| struct usb_ss_cap_descriptor ss_cap; |
| } __packed usb3_bos_desc = { |
| |
| .bos = { |
| .bLength = USB_DT_BOS_SIZE, |
| .bDescriptorType = USB_DT_BOS, |
| .wTotalLength = cpu_to_le16(sizeof(usb3_bos_desc)), |
| .bNumDeviceCaps = 1, |
| }, |
| .ss_cap = { |
| .bLength = USB_DT_USB_SS_CAP_SIZE, |
| .bDescriptorType = USB_DT_DEVICE_CAPABILITY, |
| .bDevCapabilityType = USB_SS_CAP_TYPE, |
| .wSpeedSupported = cpu_to_le16(USB_5GBPS_OPERATION), |
| .bFunctionalitySupport = ilog2(USB_5GBPS_OPERATION), |
| }, |
| }; |
| |
| static inline void |
| ss_hub_descriptor(struct usb_hub_descriptor *desc) |
| { |
| memset(desc, 0, sizeof *desc); |
| desc->bDescriptorType = USB_DT_SS_HUB; |
| desc->bDescLength = 12; |
| desc->wHubCharacteristics = cpu_to_le16( |
| HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_COMMON_OCPM); |
| desc->bNbrPorts = VHCI_HC_PORTS; |
| desc->u.ss.bHubHdrDecLat = 0x04; /* Worst case: 0.4 micro sec*/ |
| desc->u.ss.DeviceRemovable = 0xffff; |
| } |
| |
| static inline void hub_descriptor(struct usb_hub_descriptor *desc) |
| { |
| int width; |
| |
| memset(desc, 0, sizeof(*desc)); |
| desc->bDescriptorType = USB_DT_HUB; |
| desc->wHubCharacteristics = cpu_to_le16( |
| HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_COMMON_OCPM); |
| |
| desc->bNbrPorts = VHCI_HC_PORTS; |
| BUILD_BUG_ON(VHCI_HC_PORTS > USB_MAXCHILDREN); |
| width = desc->bNbrPorts / 8 + 1; |
| desc->bDescLength = USB_DT_HUB_NONVAR_SIZE + 2 * width; |
| memset(&desc->u.hs.DeviceRemovable[0], 0, width); |
| memset(&desc->u.hs.DeviceRemovable[width], 0xff, width); |
| } |
| |
| static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, |
| u16 wIndex, char *buf, u16 wLength) |
| { |
| struct vhci_hcd *vhci_hcd; |
| struct vhci *vhci; |
| int retval = 0; |
| int rhport = -1; |
| unsigned long flags; |
| bool invalid_rhport = false; |
| |
| u32 prev_port_status[VHCI_HC_PORTS]; |
| |
| if (!HCD_HW_ACCESSIBLE(hcd)) |
| return -ETIMEDOUT; |
| |
| /* |
| * NOTE: |
| * wIndex (bits 0-7) shows the port number and begins from 1? |
| */ |
| wIndex = ((__u8)(wIndex & 0x00ff)); |
| usbip_dbg_vhci_rh("typeReq %x wValue %x wIndex %x\n", typeReq, wValue, |
| wIndex); |
| |
| /* |
| * wIndex can be 0 for some request types (typeReq). rhport is |
| * in valid range when wIndex >= 1 and < VHCI_HC_PORTS. |
| * |
| * Reference port_status[] only with valid rhport when |
| * invalid_rhport is false. |
| */ |
| if (wIndex < 1 || wIndex > VHCI_HC_PORTS) { |
| invalid_rhport = true; |
| if (wIndex > VHCI_HC_PORTS) |
| pr_err("invalid port number %d\n", wIndex); |
| } else |
| rhport = wIndex - 1; |
| |
| vhci_hcd = hcd_to_vhci_hcd(hcd); |
| vhci = vhci_hcd->vhci; |
| |
| spin_lock_irqsave(&vhci->lock, flags); |
| |
| /* store old status and compare now and old later */ |
| if (usbip_dbg_flag_vhci_rh) { |
| if (!invalid_rhport) |
| memcpy(prev_port_status, vhci_hcd->port_status, |
| sizeof(prev_port_status)); |
| } |
| |
| switch (typeReq) { |
| case ClearHubFeature: |
| usbip_dbg_vhci_rh(" ClearHubFeature\n"); |
| break; |
| case ClearPortFeature: |
| if (invalid_rhport) { |
| pr_err("invalid port number %d\n", wIndex); |
| goto error; |
| } |
| switch (wValue) { |
| case USB_PORT_FEAT_SUSPEND: |
| if (hcd->speed == HCD_USB3) { |
| pr_err(" ClearPortFeature: USB_PORT_FEAT_SUSPEND req not " |
| "supported for USB 3.0 roothub\n"); |
| goto error; |
| } |
| usbip_dbg_vhci_rh( |
| " ClearPortFeature: USB_PORT_FEAT_SUSPEND\n"); |
| if (vhci_hcd->port_status[rhport] & USB_PORT_STAT_SUSPEND) { |
| /* 20msec signaling */ |
| vhci_hcd->resuming = 1; |
| vhci_hcd->re_timeout = jiffies + msecs_to_jiffies(20); |
| } |
| break; |
| case USB_PORT_FEAT_POWER: |
| usbip_dbg_vhci_rh( |
| " ClearPortFeature: 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; |
| default: |
| usbip_dbg_vhci_rh(" ClearPortFeature: default %x\n", |
| wValue); |
| vhci_hcd->port_status[rhport] &= ~(1 << wValue); |
| break; |
| } |
| break; |
| case GetHubDescriptor: |
| usbip_dbg_vhci_rh(" GetHubDescriptor\n"); |
| if (hcd->speed == HCD_USB3 && |
| (wLength < USB_DT_SS_HUB_SIZE || |
| wValue != (USB_DT_SS_HUB << 8))) { |
| pr_err("Wrong hub descriptor type for USB 3.0 roothub.\n"); |
| goto error; |
| } |
| if (hcd->speed == HCD_USB3) |
| ss_hub_descriptor((struct usb_hub_descriptor *) buf); |
| else |
| hub_descriptor((struct usb_hub_descriptor *) buf); |
| break; |
| case DeviceRequest | USB_REQ_GET_DESCRIPTOR: |
| if (hcd->speed != HCD_USB3) |
| goto error; |
| |
| if ((wValue >> 8) != USB_DT_BOS) |
| goto error; |
| |
| memcpy(buf, &usb3_bos_desc, sizeof(usb3_bos_desc)); |
| retval = sizeof(usb3_bos_desc); |
| break; |
| case GetHubStatus: |
| usbip_dbg_vhci_rh(" GetHubStatus\n"); |
| *(__le32 *) buf = cpu_to_le32(0); |
| break; |
| case GetPortStatus: |
| usbip_dbg_vhci_rh(" GetPortStatus port %x\n", wIndex); |
| if (invalid_rhport) { |
| pr_err("invalid port number %d\n", wIndex); |
| retval = -EPIPE; |
| goto error; |
| } |
| |
| /* we do not care about resume. */ |
| |
| /* whoever resets or resumes must GetPortStatus to |
| * complete it!! |
| */ |
| if (vhci_hcd->resuming && time_after(jiffies, vhci_hcd->re_timeout)) { |
| vhci_hcd->port_status[rhport] |= (1 << USB_PORT_FEAT_C_SUSPEND); |
| vhci_hcd->port_status[rhport] &= ~(1 << USB_PORT_FEAT_SUSPEND); |
| vhci_hcd->resuming = 0; |
| vhci_hcd->re_timeout = 0; |
| } |
| |
| if ((vhci_hcd->port_status[rhport] & (1 << USB_PORT_FEAT_RESET)) != |
| 0 && time_after(jiffies, vhci_hcd->re_timeout)) { |
| vhci_hcd->port_status[rhport] |= (1 << USB_PORT_FEAT_C_RESET); |
| vhci_hcd->port_status[rhport] &= ~(1 << USB_PORT_FEAT_RESET); |
| vhci_hcd->re_timeout = 0; |
| |
| if (vhci_hcd->vdev[rhport].ud.status == |
| VDEV_ST_NOTASSIGNED) { |
| usbip_dbg_vhci_rh( |
| " enable rhport %d (status %u)\n", |
| rhport, |
| vhci_hcd->vdev[rhport].ud.status); |
| vhci_hcd->port_status[rhport] |= |
| USB_PORT_STAT_ENABLE; |
| } |
| |
| if (hcd->speed < HCD_USB3) { |
| switch (vhci_hcd->vdev[rhport].speed) { |
| case USB_SPEED_HIGH: |
| vhci_hcd->port_status[rhport] |= |
| USB_PORT_STAT_HIGH_SPEED; |
| break; |
| 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; |
| } |
| |
| if (invalid_rhport) { |
| pr_err("invalid port number %d\n", wIndex); |
| 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 (invalid_rhport) { |
| pr_err("invalid port number %d\n", wIndex); |
| goto error; |
| } |
| 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"); |
| if (invalid_rhport) { |
| pr_err("invalid port number %d\n", wIndex); |
| goto error; |
| } |
| /* 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 (invalid_rhport) { |
| pr_err("invalid port number %d\n", wIndex); |
| goto error; |
| } |
| /* 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 (invalid_rhport) { |
| pr_err("invalid port number %d\n", wIndex); |
| goto error; |
| } |
| 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 (!invalid_rhport) { |
| 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 (!invalid_rhport && |
| (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; |
| |
| if (portnum > VHCI_HC_PORTS) { |
| pr_err("invalid port number %d\n", portnum); |
| return -ENODEV; |
| } |
| vdev = &vhci_hcd->vdev[portnum-1]; |
| |
| if (!urb->transfer_buffer && urb->transfer_buffer_length) { |
| dev_dbg(dev, "Null URB transfer buffer\n"); |
| return -EINVAL; |
| } |
| |
| 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; |
| |
| 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); |
| |
| 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. |
| */ |
| 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; |
| |
| /* 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 %d\n", ud->sockfd); |
| 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; |
| vdev->ud.sockfd = -1; |
| } |
| 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->sockfd = -1; |
| } |
| 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)); |
| 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 const 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; |
| } |
| } |
| |
| 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"); |