From d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 02:45:28 +0000
Subject: [PATCH] add boot partition size
---
kernel/drivers/usb/core/hcd.c | 453 +++++++++++++++++++++-----------------------------------
1 files changed, 168 insertions(+), 285 deletions(-)
diff --git a/kernel/drivers/usb/core/hcd.c b/kernel/drivers/usb/core/hcd.c
index 7de2794..bf5e376 100644
--- a/kernel/drivers/usb/core/hcd.c
+++ b/kernel/drivers/usb/core/hcd.c
@@ -29,6 +29,9 @@
#include <linux/workqueue.h>
#include <linux/pm_runtime.h>
#include <linux/types.h>
+#include <linux/genalloc.h>
+#include <linux/io.h>
+#include <linux/kcov.h>
#include <linux/phy/phy.h>
#include <linux/usb.h>
@@ -100,11 +103,6 @@
/* wait queue for synchronous unlinks */
DECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue);
-
-static inline int is_root_hub(struct usb_device *udev)
-{
- return (udev->parent == NULL);
-}
/*-------------------------------------------------------------------------*/
@@ -373,13 +371,19 @@
* -1 is authorized for all devices except wireless (old behaviour)
* 0 is unauthorized for all devices
* 1 is authorized for all devices
+ * 2 is authorized for internal devices
*/
-static int authorized_default = -1;
+#define USB_AUTHORIZE_WIRED -1
+#define USB_AUTHORIZE_NONE 0
+#define USB_AUTHORIZE_ALL 1
+#define USB_AUTHORIZE_INTERNAL 2
+
+static int authorized_default = USB_AUTHORIZE_WIRED;
module_param(authorized_default, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(authorized_default,
"Default USB device authorization: 0 is not authorized, 1 is "
- "authorized, -1 is authorized except for wireless USB (default, "
- "old behaviour");
+ "authorized, 2 is authorized for internal devices, -1 is "
+ "authorized except for wireless USB (default, old behaviour)");
/*-------------------------------------------------------------------------*/
/**
@@ -560,7 +564,7 @@
case DeviceRequest | USB_REQ_GET_CONFIGURATION:
tbuf[0] = 1;
len = 1;
- /* FALLTHROUGH */
+ fallthrough;
case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
break;
case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
@@ -629,7 +633,7 @@
case DeviceRequest | USB_REQ_GET_INTERFACE:
tbuf[0] = 0;
len = 1;
- /* FALLTHROUGH */
+ fallthrough;
case DeviceOutRequest | USB_REQ_SET_INTERFACE:
break;
case DeviceOutRequest | USB_REQ_SET_ADDRESS:
@@ -647,7 +651,7 @@
tbuf[0] = 0;
tbuf[1] = 0;
len = 2;
- /* FALLTHROUGH */
+ fallthrough;
case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
case EndpointOutRequest | USB_REQ_SET_FEATURE:
dev_dbg (hcd->self.controller, "no endpoint features yet\n");
@@ -879,104 +883,6 @@
}
-
-/*
- * Show & store the current value of authorized_default
- */
-static ssize_t authorized_default_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct usb_device *rh_usb_dev = to_usb_device(dev);
- struct usb_bus *usb_bus = rh_usb_dev->bus;
- struct usb_hcd *hcd;
-
- hcd = bus_to_hcd(usb_bus);
- return snprintf(buf, PAGE_SIZE, "%u\n", !!HCD_DEV_AUTHORIZED(hcd));
-}
-
-static ssize_t authorized_default_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t size)
-{
- ssize_t result;
- unsigned val;
- struct usb_device *rh_usb_dev = to_usb_device(dev);
- struct usb_bus *usb_bus = rh_usb_dev->bus;
- struct usb_hcd *hcd;
-
- hcd = bus_to_hcd(usb_bus);
- result = sscanf(buf, "%u\n", &val);
- if (result == 1) {
- if (val)
- set_bit(HCD_FLAG_DEV_AUTHORIZED, &hcd->flags);
- else
- clear_bit(HCD_FLAG_DEV_AUTHORIZED, &hcd->flags);
-
- result = size;
- } else {
- result = -EINVAL;
- }
- return result;
-}
-static DEVICE_ATTR_RW(authorized_default);
-
-/*
- * interface_authorized_default_show - show default authorization status
- * for USB interfaces
- *
- * note: interface_authorized_default is the default value
- * for initializing the authorized attribute of interfaces
- */
-static ssize_t interface_authorized_default_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct usb_device *usb_dev = to_usb_device(dev);
- struct usb_hcd *hcd = bus_to_hcd(usb_dev->bus);
-
- return sprintf(buf, "%u\n", !!HCD_INTF_AUTHORIZED(hcd));
-}
-
-/*
- * interface_authorized_default_store - store default authorization status
- * for USB interfaces
- *
- * note: interface_authorized_default is the default value
- * for initializing the authorized attribute of interfaces
- */
-static ssize_t interface_authorized_default_store(struct device *dev,
- struct device_attribute *attr, const char *buf, size_t count)
-{
- struct usb_device *usb_dev = to_usb_device(dev);
- struct usb_hcd *hcd = bus_to_hcd(usb_dev->bus);
- int rc = count;
- bool val;
-
- if (strtobool(buf, &val) != 0)
- return -EINVAL;
-
- if (val)
- set_bit(HCD_FLAG_INTF_AUTHORIZED, &hcd->flags);
- else
- clear_bit(HCD_FLAG_INTF_AUTHORIZED, &hcd->flags);
-
- return rc;
-}
-static DEVICE_ATTR_RW(interface_authorized_default);
-
-/* Group all the USB bus attributes */
-static struct attribute *usb_bus_attrs[] = {
- &dev_attr_authorized_default.attr,
- &dev_attr_interface_authorized_default.attr,
- NULL,
-};
-
-static const struct attribute_group usb_bus_attr_group = {
- .name = NULL, /* we want them in the same directory */
- .attrs = usb_bus_attrs,
-};
-
-
-
/*-------------------------------------------------------------------------*/
/**
@@ -1081,8 +987,6 @@
usb_dev->devnum = devnum;
usb_dev->bus->devnum_next = devnum + 1;
- memset (&usb_dev->bus->devmap.devicemap, 0,
- sizeof usb_dev->bus->devmap.devicemap);
set_bit (devnum, usb_dev->bus->devmap.devicemap);
usb_set_device_state(usb_dev, USB_STATE_ADDRESS);
@@ -1351,14 +1255,11 @@
* using regular system memory - like pci devices doing bus mastering.
*
* To support host controllers with limited dma capabilities we provide dma
- * bounce buffers. This feature can be enabled using the HCD_LOCAL_MEM flag.
- * For this to work properly the host controller code must first use the
- * function dma_declare_coherent_memory() to point out which memory area
- * that should be used for dma allocations.
+ * bounce buffers. This feature can be enabled by initializing
+ * hcd->localmem_pool using usb_hcd_setup_local_mem().
*
- * The HCD_LOCAL_MEM flag then tells the usb code to allocate all data for
- * dma using dma_alloc_coherent() which in turn allocates from the memory
- * area pointed out with dma_declare_coherent_memory().
+ * The initialized hcd->localmem_pool then tells the usb code to allocate all
+ * data for dma using the genalloc API.
*
* So, to summarize...
*
@@ -1367,9 +1268,6 @@
* only memory that the controller can read ...
* (a) "normal" kernel memory is no good, and
* (b) there's not enough to share
- *
- * - The only *portable* hook for such stuff in the
- * DMA framework is dma_declare_coherent_memory()
*
* - So we use that, even though the primary requirement
* is that the memory be "local" (hence addressable
@@ -1519,11 +1417,18 @@
if (usb_endpoint_xfer_control(&urb->ep->desc)) {
if (hcd->self.uses_pio_for_control)
return ret;
- if (IS_ENABLED(CONFIG_HAS_DMA) && hcd->self.uses_dma) {
- if (is_vmalloc_addr(urb->setup_packet)) {
- WARN_ONCE(1, "setup packet is not dma capable\n");
- return -EAGAIN;
- } else if (object_is_on_stack(urb->setup_packet)) {
+ if (hcd->localmem_pool) {
+ ret = hcd_alloc_coherent(
+ urb->dev->bus, mem_flags,
+ &urb->setup_dma,
+ (void **)&urb->setup_packet,
+ sizeof(struct usb_ctrlrequest),
+ DMA_TO_DEVICE);
+ if (ret)
+ return ret;
+ urb->transfer_flags |= URB_SETUP_MAP_LOCAL;
+ } else if (hcd_uses_dma(hcd)) {
+ if (object_is_on_stack(urb->setup_packet)) {
WARN_ONCE(1, "setup packet is on stack\n");
return -EAGAIN;
}
@@ -1537,23 +1442,22 @@
urb->setup_dma))
return -EAGAIN;
urb->transfer_flags |= URB_SETUP_MAP_SINGLE;
- } else if (hcd->driver->flags & HCD_LOCAL_MEM) {
- ret = hcd_alloc_coherent(
- urb->dev->bus, mem_flags,
- &urb->setup_dma,
- (void **)&urb->setup_packet,
- sizeof(struct usb_ctrlrequest),
- DMA_TO_DEVICE);
- if (ret)
- return ret;
- urb->transfer_flags |= URB_SETUP_MAP_LOCAL;
}
}
dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
if (urb->transfer_buffer_length != 0
&& !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) {
- if (IS_ENABLED(CONFIG_HAS_DMA) && hcd->self.uses_dma) {
+ if (hcd->localmem_pool) {
+ ret = hcd_alloc_coherent(
+ urb->dev->bus, mem_flags,
+ &urb->transfer_dma,
+ &urb->transfer_buffer,
+ urb->transfer_buffer_length,
+ dir);
+ if (ret == 0)
+ urb->transfer_flags |= URB_MAP_LOCAL;
+ } else if (hcd_uses_dma(hcd)) {
if (urb->num_sgs) {
int n;
@@ -1589,9 +1493,6 @@
ret = -EAGAIN;
else
urb->transfer_flags |= URB_DMA_MAP_PAGE;
- } else if (is_vmalloc_addr(urb->transfer_buffer)) {
- WARN_ONCE(1, "transfer buffer not dma capable\n");
- ret = -EAGAIN;
} else if (object_is_on_stack(urb->transfer_buffer)) {
WARN_ONCE(1, "transfer buffer is on stack\n");
ret = -EAGAIN;
@@ -1607,15 +1508,6 @@
else
urb->transfer_flags |= URB_DMA_MAP_SINGLE;
}
- } else if (hcd->driver->flags & HCD_LOCAL_MEM) {
- ret = hcd_alloc_coherent(
- urb->dev->bus, mem_flags,
- &urb->transfer_dma,
- &urb->transfer_buffer,
- urb->transfer_buffer_length,
- dir);
- if (ret == 0)
- urb->transfer_flags |= URB_MAP_LOCAL;
}
if (ret && (urb->transfer_flags & (URB_SETUP_MAP_SINGLE |
URB_SETUP_MAP_LOCAL)))
@@ -1752,7 +1644,6 @@
struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus);
struct usb_anchor *anchor = urb->anchor;
int status = urb->unlinked;
- unsigned long flags;
urb->hcpriv = NULL;
if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) &&
@@ -1769,20 +1660,16 @@
/* pass ownership to the completion handler */
urb->status = status;
-
/*
- * We disable local IRQs here avoid possible deadlock because
- * drivers may call spin_lock() to hold lock which might be
- * acquired in one hard interrupt handler.
- *
- * The local_irq_save()/local_irq_restore() around complete()
- * will be removed if current USB drivers have been cleaned up
- * and no one may trigger the above deadlock situation when
- * running complete() in tasklet.
+ * This function can be called in task context inside another remote
+ * coverage collection section, but KCOV doesn't support that kind of
+ * recursion yet. Only collect coverage in softirq context for now.
*/
- local_irq_save(flags);
+ if (in_serving_softirq())
+ kcov_remote_start_usb((u64)urb->dev->bus->busnum);
urb->complete(urb);
- local_irq_restore(flags);
+ if (in_serving_softirq())
+ kcov_remote_stop();
usb_anchor_resume_wakeups(anchor);
atomic_dec(&urb->use_count);
@@ -1798,9 +1685,9 @@
usb_put_urb(urb);
}
-static void usb_giveback_urb_bh(unsigned long param)
+static void usb_giveback_urb_bh(struct tasklet_struct *t)
{
- struct giveback_urb_bh *bh = (struct giveback_urb_bh *)param;
+ struct giveback_urb_bh *bh = from_tasklet(bh, t, bh);
struct list_head local_list;
spin_lock_irq(&bh->lock);
@@ -1912,23 +1799,10 @@
/* kick hcd */
unlink1(hcd, urb, -ESHUTDOWN);
dev_dbg (hcd->self.controller,
- "shutdown urb %pK ep%d%s%s\n",
+ "shutdown urb %pK ep%d%s-%s\n",
urb, usb_endpoint_num(&ep->desc),
is_in ? "in" : "out",
- ({ char *s;
-
- switch (usb_endpoint_type(&ep->desc)) {
- case USB_ENDPOINT_XFER_CONTROL:
- s = ""; break;
- case USB_ENDPOINT_XFER_BULK:
- s = "-bulk"; break;
- case USB_ENDPOINT_XFER_INT:
- s = "-intr"; break;
- default:
- s = "-iso"; break;
- };
- s;
- }));
+ usb_ep_type_string(usb_endpoint_type(&ep->desc)));
usb_put_urb (urb);
/* list contents may have changed */
@@ -2254,71 +2128,7 @@
return hcd->driver->get_frame_number (hcd);
}
-int usb_hcd_sec_event_ring_setup(struct usb_device *udev,
- unsigned int intr_num)
-{
- struct usb_hcd *hcd = bus_to_hcd(udev->bus);
-
- if (!HCD_RH_RUNNING(hcd))
- return 0;
-
- return hcd->driver->sec_event_ring_setup(hcd, intr_num);
-}
-
-int usb_hcd_sec_event_ring_cleanup(struct usb_device *udev,
- unsigned int intr_num)
-{
- struct usb_hcd *hcd = bus_to_hcd(udev->bus);
-
- if (!HCD_RH_RUNNING(hcd))
- return 0;
-
- return hcd->driver->sec_event_ring_cleanup(hcd, intr_num);
-}
-
/*-------------------------------------------------------------------------*/
-
-phys_addr_t
-usb_hcd_get_sec_event_ring_phys_addr(struct usb_device *udev,
- unsigned int intr_num, dma_addr_t *dma)
-{
- struct usb_hcd *hcd = bus_to_hcd(udev->bus);
-
- if (!HCD_RH_RUNNING(hcd))
- return 0;
-
- return hcd->driver->get_sec_event_ring_phys_addr(hcd, intr_num, dma);
-}
-
-phys_addr_t
-usb_hcd_get_xfer_ring_phys_addr(struct usb_device *udev,
- struct usb_host_endpoint *ep, dma_addr_t *dma)
-{
- struct usb_hcd *hcd = bus_to_hcd(udev->bus);
-
- if (!HCD_RH_RUNNING(hcd))
- return 0;
-
- return hcd->driver->get_xfer_ring_phys_addr(hcd, udev, ep, dma);
-}
-
-int usb_hcd_get_controller_id(struct usb_device *udev)
-{
- struct usb_hcd *hcd = bus_to_hcd(udev->bus);
-
- if (!HCD_RH_RUNNING(hcd))
- return -EINVAL;
-
- return hcd->driver->get_core_id(hcd);
-}
-
-int usb_hcd_stop_endpoint(struct usb_device *udev,
- struct usb_host_endpoint *ep)
-{
- struct usb_hcd *hcd = bus_to_hcd(udev->bus);
-
- return hcd->driver->stop_endpoint(hcd, udev, ep);
-}
#ifdef CONFIG_PM
@@ -2403,6 +2213,9 @@
hcd->state = HC_STATE_RESUMING;
status = hcd->driver->bus_resume(hcd);
clear_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags);
+ if (status == 0)
+ status = usb_phy_roothub_calibrate(hcd->phy_roothub);
+
if (status == 0) {
struct usb_device *udev;
int port1;
@@ -2546,6 +2359,19 @@
/*-------------------------------------------------------------------------*/
+/* Workqueue routine for when the root-hub has died. */
+static void hcd_died_work(struct work_struct *work)
+{
+ struct usb_hcd *hcd = container_of(work, struct usb_hcd, died_work);
+ static char *env[] = {
+ "ERROR=DEAD",
+ NULL
+ };
+
+ /* Notify user space that the host controller has died */
+ kobject_uevent_env(&hcd->self.root_hub->dev.kobj, KOBJ_OFFLINE, env);
+}
+
/**
* usb_hc_died - report abnormal shutdown of a host controller (bus glue)
* @hcd: pointer to the HCD representing the controller
@@ -2586,9 +2412,15 @@
usb_kick_hub_wq(hcd->self.root_hub);
}
}
+
+ /* Handle the case where this function gets called with a shared HCD */
+ if (usb_hcd_is_primary_hcd(hcd))
+ schedule_work(&hcd->died_work);
+ else
+ schedule_work(&hcd->primary_hcd->died_work);
+
spin_unlock_irqrestore (&hcd_root_hub_lock, flags);
/* Make sure that the other roothub is also deallocated. */
- usb_atomic_notify_dead_bus(&hcd->self);
}
EXPORT_SYMBOL_GPL (usb_hc_died);
@@ -2599,7 +2431,7 @@
spin_lock_init(&bh->lock);
INIT_LIST_HEAD(&bh->head);
- tasklet_init(&bh->bh, usb_giveback_urb_bh, (unsigned long)bh);
+ tasklet_setup(&bh->bh, usb_giveback_urb_bh);
}
struct usb_hcd *__usb_create_hcd(const struct hc_driver *driver,
@@ -2647,12 +2479,13 @@
hcd->self.controller = dev;
hcd->self.sysdev = sysdev;
hcd->self.bus_name = bus_name;
- hcd->self.uses_dma = (sysdev->dma_mask != NULL);
timer_setup(&hcd->rh_timer, rh_timer_func, 0);
#ifdef CONFIG_PM
INIT_WORK(&hcd->wakeup_work, hcd_resume_work);
#endif
+
+ INIT_WORK(&hcd->died_work, hcd_died_work);
hcd->driver = driver;
hcd->speed = driver->flags & HCD_MASK;
@@ -2828,6 +2661,7 @@
{
int retval;
struct usb_device *rhdev;
+ struct usb_hcd *shared_hcd;
if (!hcd->skip_phy_initialization && usb_hcd_is_primary_hcd(hcd)) {
hcd->phy_roothub = usb_phy_roothub_alloc(hcd->self.sysdev);
@@ -2838,6 +2672,14 @@
if (retval)
return retval;
+ retval = usb_phy_roothub_set_mode(hcd->phy_roothub,
+ PHY_MODE_USB_HOST_SS);
+ if (retval)
+ retval = usb_phy_roothub_set_mode(hcd->phy_roothub,
+ PHY_MODE_USB_HOST);
+ if (retval)
+ goto err_usb_phy_roothub_power_on;
+
retval = usb_phy_roothub_power_on(hcd->phy_roothub);
if (retval)
goto err_usb_phy_roothub_power_on;
@@ -2845,18 +2687,26 @@
dev_info(hcd->self.controller, "%s\n", hcd->product_desc);
- /* Keep old behaviour if authorized_default is not in [0, 1]. */
- if (authorized_default < 0 || authorized_default > 1) {
- if (hcd->wireless)
- clear_bit(HCD_FLAG_DEV_AUTHORIZED, &hcd->flags);
- else
- set_bit(HCD_FLAG_DEV_AUTHORIZED, &hcd->flags);
- } else {
- if (authorized_default)
- set_bit(HCD_FLAG_DEV_AUTHORIZED, &hcd->flags);
- else
- clear_bit(HCD_FLAG_DEV_AUTHORIZED, &hcd->flags);
+ switch (authorized_default) {
+ case USB_AUTHORIZE_NONE:
+ hcd->dev_policy = USB_DEVICE_AUTHORIZE_NONE;
+ break;
+
+ case USB_AUTHORIZE_ALL:
+ hcd->dev_policy = USB_DEVICE_AUTHORIZE_ALL;
+ break;
+
+ case USB_AUTHORIZE_INTERNAL:
+ hcd->dev_policy = USB_DEVICE_AUTHORIZE_INTERNAL;
+ break;
+
+ case USB_AUTHORIZE_WIRED:
+ default:
+ hcd->dev_policy = hcd->wireless ?
+ USB_DEVICE_AUTHORIZE_NONE : USB_DEVICE_AUTHORIZE_ALL;
+ break;
}
+
set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
/* per default all interfaces are authorized */
@@ -2905,7 +2755,7 @@
case HCD_USB32:
rhdev->rx_lanes = 2;
rhdev->tx_lanes = 2;
- /* fall through */
+ fallthrough;
case HCD_USB31:
rhdev->speed = USB_SPEED_SUPER_PLUS;
break;
@@ -2939,6 +2789,10 @@
}
hcd->rh_pollable = 1;
+ retval = usb_phy_roothub_calibrate(hcd->phy_roothub);
+ if (retval)
+ goto err_hcd_driver_setup;
+
/* NOTE: root hub and controller capabilities may not be the same */
if (device_can_wakeup(hcd->self.controller)
&& device_can_wakeup(&hcd->self.root_hub->dev))
@@ -2964,36 +2818,29 @@
goto err_hcd_driver_start;
}
- /* starting here, usbcore will pay attention to this root hub */
- retval = register_root_hub(hcd);
- if (retval != 0)
- goto err_register_root_hub;
+ /* starting here, usbcore will pay attention to the shared HCD roothub */
+ shared_hcd = hcd->shared_hcd;
+ if (!usb_hcd_is_primary_hcd(hcd) && shared_hcd && HCD_DEFER_RH_REGISTER(shared_hcd)) {
+ retval = register_root_hub(shared_hcd);
+ if (retval != 0)
+ goto err_register_root_hub;
- retval = sysfs_create_group(&rhdev->dev.kobj, &usb_bus_attr_group);
- if (retval < 0) {
- printk(KERN_ERR "Cannot register USB bus sysfs attributes: %d\n",
- retval);
- goto error_create_attr_group;
+ if (shared_hcd->uses_new_polling && HCD_POLL_RH(shared_hcd))
+ usb_hcd_poll_rh_status(shared_hcd);
}
- if (hcd->uses_new_polling && HCD_POLL_RH(hcd))
- usb_hcd_poll_rh_status(hcd);
+
+ /* starting here, usbcore will pay attention to this root hub */
+ if (!HCD_DEFER_RH_REGISTER(hcd)) {
+ retval = register_root_hub(hcd);
+ if (retval != 0)
+ goto err_register_root_hub;
+
+ if (hcd->uses_new_polling && HCD_POLL_RH(hcd))
+ usb_hcd_poll_rh_status(hcd);
+ }
return retval;
-error_create_attr_group:
- clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags);
- if (HC_IS_RUNNING(hcd->state))
- hcd->state = HC_STATE_QUIESCING;
- spin_lock_irq(&hcd_root_hub_lock);
- hcd->rh_registered = 0;
- spin_unlock_irq(&hcd_root_hub_lock);
-
-#ifdef CONFIG_PM
- cancel_work_sync(&hcd->wakeup_work);
-#endif
- mutex_lock(&usb_bus_idr_lock);
- usb_disconnect(&rhdev); /* Sets rhdev to NULL */
- mutex_unlock(&usb_bus_idr_lock);
err_register_root_hub:
hcd->rh_pollable = 0;
clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
@@ -3033,27 +2880,29 @@
void usb_remove_hcd(struct usb_hcd *hcd)
{
struct usb_device *rhdev = hcd->self.root_hub;
+ bool rh_registered;
dev_info(hcd->self.controller, "remove, state %x\n", hcd->state);
usb_get_dev(rhdev);
- sysfs_remove_group(&rhdev->dev.kobj, &usb_bus_attr_group);
-
clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags);
if (HC_IS_RUNNING (hcd->state))
hcd->state = HC_STATE_QUIESCING;
dev_dbg(hcd->self.controller, "roothub graceful disconnect\n");
spin_lock_irq (&hcd_root_hub_lock);
+ rh_registered = hcd->rh_registered;
hcd->rh_registered = 0;
spin_unlock_irq (&hcd_root_hub_lock);
#ifdef CONFIG_PM
cancel_work_sync(&hcd->wakeup_work);
#endif
+ cancel_work_sync(&hcd->died_work);
mutex_lock(&usb_bus_idr_lock);
- usb_disconnect(&rhdev); /* Sets rhdev to NULL */
+ if (rh_registered)
+ usb_disconnect(&rhdev); /* Sets rhdev to NULL */
mutex_unlock(&usb_bus_idr_lock);
/*
@@ -3111,6 +2960,40 @@
}
EXPORT_SYMBOL_GPL(usb_hcd_platform_shutdown);
+int usb_hcd_setup_local_mem(struct usb_hcd *hcd, phys_addr_t phys_addr,
+ dma_addr_t dma, size_t size)
+{
+ int err;
+ void *local_mem;
+
+ hcd->localmem_pool = devm_gen_pool_create(hcd->self.sysdev, 4,
+ dev_to_node(hcd->self.sysdev),
+ dev_name(hcd->self.sysdev));
+ if (IS_ERR(hcd->localmem_pool))
+ return PTR_ERR(hcd->localmem_pool);
+
+ local_mem = devm_memremap(hcd->self.sysdev, phys_addr,
+ size, MEMREMAP_WC);
+ if (IS_ERR(local_mem))
+ return PTR_ERR(local_mem);
+
+ /*
+ * Here we pass a dma_addr_t but the arg type is a phys_addr_t.
+ * It's not backed by system memory and thus there's no kernel mapping
+ * for it.
+ */
+ err = gen_pool_add_virt(hcd->localmem_pool, (unsigned long)local_mem,
+ dma, size, dev_to_node(hcd->self.sysdev));
+ if (err < 0) {
+ dev_err(hcd->self.sysdev, "gen_pool_add_virt failed with %d\n",
+ err);
+ return err;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(usb_hcd_setup_local_mem);
+
/*-------------------------------------------------------------------------*/
#if IS_ENABLED(CONFIG_USB_MON)
--
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