diff options
Diffstat (limited to 'drivers/usb/core/hcd.c')
| -rw-r--r-- | drivers/usb/core/hcd.c | 904 |
1 files changed, 504 insertions, 400 deletions
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index ab1bb3b538ac..24feb0de1c00 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * (C) Copyright Linus Torvalds 1999 * (C) Copyright Johannes Erdfelt 1999-2001 @@ -6,20 +7,6 @@ * (C) Copyright Deti Fliegl 1999 * (C) Copyright Randy Dunlap 2000 * (C) Copyright David Brownell 2000-2002 - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software Foundation, - * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/bcd.h> @@ -37,19 +24,22 @@ #include <linux/mutex.h> #include <asm/irq.h> #include <asm/byteorder.h> -#include <asm/unaligned.h> +#include <linux/unaligned.h> #include <linux/platform_device.h> #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> #include <linux/usb/hcd.h> -#include <linux/usb/phy.h> #include <linux/usb/otg.h> #include "usb.h" +#include "phy.h" /*-------------------------------------------------------------------------*/ @@ -114,11 +104,6 @@ static DEFINE_SPINLOCK(hcd_urb_unlink_lock); /* 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); -} - /*-------------------------------------------------------------------------*/ /* @@ -126,8 +111,8 @@ static inline int is_root_hub(struct usb_device *udev) */ /*-------------------------------------------------------------------------*/ -#define KERNEL_REL bin2bcd(((LINUX_VERSION_CODE >> 16) & 0x0ff)) -#define KERNEL_VER bin2bcd(((LINUX_VERSION_CODE >> 8) & 0x0ff)) +#define KERNEL_REL bin2bcd(LINUX_VERSION_MAJOR) +#define KERNEL_VER bin2bcd(LINUX_VERSION_PATCHLEVEL) /* usb 3.1 root hub device descriptor */ static const u8 usb31_rh_dev_descriptor[18] = { @@ -171,27 +156,6 @@ static const u8 usb3_rh_dev_descriptor[18] = { 0x01 /* __u8 bNumConfigurations; */ }; -/* usb 2.5 (wireless USB 1.0) root hub device descriptor */ -static const u8 usb25_rh_dev_descriptor[18] = { - 0x12, /* __u8 bLength; */ - USB_DT_DEVICE, /* __u8 bDescriptorType; Device */ - 0x50, 0x02, /* __le16 bcdUSB; v2.5 */ - - 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ - 0x00, /* __u8 bDeviceSubClass; */ - 0x00, /* __u8 bDeviceProtocol; [ usb 2.0 no TT ] */ - 0xFF, /* __u8 bMaxPacketSize0; always 0xFF (WUSB Spec 7.4.1). */ - - 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation 0x1d6b */ - 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ - KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ - - 0x03, /* __u8 iManufacturer; */ - 0x02, /* __u8 iProduct; */ - 0x01, /* __u8 iSerialNumber; */ - 0x01 /* __u8 bNumConfigurations; */ -}; - /* usb 2.0 root hub device descriptor */ static const u8 usb2_rh_dev_descriptor[18] = { 0x12, /* __u8 bLength; */ @@ -383,16 +347,20 @@ static const u8 ss_rh_config_descriptor[] = { }; /* authorized_default behaviour: - * -1 is authorized for all devices except wireless (old behaviour) + * -1 is authorized for all devices (leftover from wireless USB) * 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 = CONFIG_USB_DEFAULT_AUTHORIZATION_MODE; 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"); + "Default USB device authorization: 0 is not authorized, 1 is authorized (default), 2 is authorized for internal devices, -1 is authorized (same as 1)"); /*-------------------------------------------------------------------------*/ /** @@ -447,7 +415,7 @@ ascii2desc(char const *s, u8 *buf, unsigned len) static unsigned rh_string(int id, struct usb_hcd const *hcd, u8 *data, unsigned len) { - char buf[100]; + char buf[160]; char const *s; static char const langids[4] = {4, USB_DT_STRING, 0x09, 0x04}; @@ -573,22 +541,20 @@ static int rh_call_control (struct usb_hcd *hcd, struct urb *urb) 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: switch (wValue & 0xff00) { case USB_DT_DEVICE << 8: switch (hcd->speed) { + case HCD_USB32: case HCD_USB31: bufp = usb31_rh_dev_descriptor; break; case HCD_USB3: bufp = usb3_rh_dev_descriptor; break; - case HCD_USB25: - bufp = usb25_rh_dev_descriptor; - break; case HCD_USB2: bufp = usb2_rh_dev_descriptor; break; @@ -604,12 +570,12 @@ static int rh_call_control (struct usb_hcd *hcd, struct urb *urb) break; case USB_DT_CONFIG << 8: switch (hcd->speed) { + case HCD_USB32: case HCD_USB31: case HCD_USB3: bufp = ss_rh_config_descriptor; len = sizeof ss_rh_config_descriptor; break; - case HCD_USB25: case HCD_USB2: bufp = hs_rh_config_descriptor; len = sizeof hs_rh_config_descriptor; @@ -640,7 +606,7 @@ static int rh_call_control (struct usb_hcd *hcd, struct urb *urb) 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: @@ -658,7 +624,7 @@ static int rh_call_control (struct usb_hcd *hcd, struct urb *urb) 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"); @@ -754,13 +720,13 @@ error: * driver requests it; otherwise the driver is responsible for * calling usb_hcd_poll_rh_status() when an event occurs. * - * Completions are called in_interrupt(), but they may or may not - * be in_irq(). + * Completion handler may not sleep. See usb_hcd_giveback_urb() for details. */ void usb_hcd_poll_rh_status(struct usb_hcd *hcd) { struct urb *urb; int length; + int status; unsigned long flags; char buffer[6]; /* Any root hubs with > 31 ports? */ @@ -778,11 +744,17 @@ void usb_hcd_poll_rh_status(struct usb_hcd *hcd) if (urb) { clear_bit(HCD_FLAG_POLL_PENDING, &hcd->flags); hcd->status_urb = NULL; + if (urb->transfer_buffer_length >= length) { + status = 0; + } else { + status = -EOVERFLOW; + length = urb->transfer_buffer_length; + } urb->actual_length = length; memcpy(urb->transfer_buffer, buffer, length); usb_hcd_unlink_urb_from_ep(hcd, urb); - usb_hcd_giveback_urb(hcd, urb, 0); + usb_hcd_giveback_urb(hcd, urb, status); } else { length = 0; set_bit(HCD_FLAG_POLL_PENDING, &hcd->flags); @@ -801,9 +773,11 @@ void usb_hcd_poll_rh_status(struct usb_hcd *hcd) EXPORT_SYMBOL_GPL(usb_hcd_poll_rh_status); /* timer callback */ -static void rh_timer_func (unsigned long _hcd) +static void rh_timer_func (struct timer_list *t) { - usb_hcd_poll_rh_status((struct usb_hcd *) _hcd); + struct usb_hcd *_hcd = timer_container_of(_hcd, t, rh_timer); + + usb_hcd_poll_rh_status(_hcd); } /*-------------------------------------------------------------------------*/ @@ -868,7 +842,7 @@ static int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) } else { /* Status URB */ if (!hcd->uses_new_polling) - del_timer (&hcd->rh_timer); + timer_delete(&hcd->rh_timer); if (urb == hcd->status_urb) { hcd->status_urb = NULL; usb_hcd_unlink_urb_from_ep(hcd, urb); @@ -881,104 +855,6 @@ static int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) } - -/* - * 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 struct attribute_group usb_bus_attr_group = { - .name = NULL, /* we want them in the same directory */ - .attrs = usb_bus_attrs, -}; - - - /*-------------------------------------------------------------------------*/ /** @@ -990,7 +866,7 @@ static struct attribute_group usb_bus_attr_group = { */ static void usb_bus_init (struct usb_bus *bus) { - memset (&bus->devmap, 0, sizeof(struct usb_devmap)); + memset(&bus->devmap, 0, sizeof(bus->devmap)); bus->devnum_next = 1; @@ -1007,7 +883,8 @@ static void usb_bus_init (struct usb_bus *bus) /** * usb_register_bus - registers the USB host controller with the usb core * @bus: pointer to the bus to register - * Context: !in_interrupt() + * + * Context: task context, might sleep. * * Assigns a bus number, and links the controller into usbcore data * structures so that it can be seen by scanning the bus list. @@ -1042,7 +919,8 @@ error_find_busnum: /** * usb_deregister_bus - deregisters the USB host controller * @bus: pointer to the bus to deregister - * Context: !in_interrupt() + * + * Context: task context, might sleep. * * Recycles the bus number, and unlinks the controller from usbcore data * structures so that it won't be seen by scanning the bus list. @@ -1078,26 +956,28 @@ static int register_root_hub(struct usb_hcd *hcd) { struct device *parent_dev = hcd->self.controller; struct usb_device *usb_dev = hcd->self.root_hub; + struct usb_device_descriptor *descr; const int devnum = 1; int retval; 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); + set_bit(devnum, usb_dev->bus->devmap); usb_set_device_state(usb_dev, USB_STATE_ADDRESS); mutex_lock(&usb_bus_idr_lock); usb_dev->ep0.desc.wMaxPacketSize = cpu_to_le16(64); - retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); - if (retval != sizeof usb_dev->descriptor) { + descr = usb_get_device_descriptor(usb_dev); + if (IS_ERR(descr)) { + retval = PTR_ERR(descr); mutex_unlock(&usb_bus_idr_lock); dev_dbg (parent_dev, "can't read %s device descriptor %d\n", dev_name(&usb_dev->dev), retval); - return (retval < 0) ? retval : -EMSGSIZE; + return retval; } + usb_dev->descriptor = *descr; + kfree(descr); if (le16_to_cpu(usb_dev->descriptor.bcdUSB) >= 0x0201) { retval = usb_get_bos_descriptor(usb_dev); @@ -1348,19 +1228,17 @@ void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb) EXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep); /* - * Some usb host controllers can only perform dma using a small SRAM area. + * Some usb host controllers can only perform dma using a small SRAM area, + * or have restrictions on addressable DRAM. * The usb core itself is however optimized for host controllers that can dma * 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... * @@ -1370,9 +1248,6 @@ EXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep); * (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 * by that device), not "coherent". @@ -1391,7 +1266,7 @@ static int hcd_alloc_coherent(struct usb_bus *bus, return -EFAULT; } - vaddr = hcd_buffer_alloc(bus, size + sizeof(vaddr), + vaddr = hcd_buffer_alloc(bus, size + sizeof(unsigned long), mem_flags, dma_handle); if (!vaddr) return -ENOMEM; @@ -1467,29 +1342,35 @@ void usb_hcd_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; if (IS_ENABLED(CONFIG_HAS_DMA) && - (urb->transfer_flags & URB_DMA_MAP_SG)) + (urb->transfer_flags & URB_DMA_MAP_SG)) { dma_unmap_sg(hcd->self.sysdev, urb->sg, urb->num_sgs, dir); - else if (IS_ENABLED(CONFIG_HAS_DMA) && - (urb->transfer_flags & URB_DMA_MAP_PAGE)) + } else if (IS_ENABLED(CONFIG_HAS_DMA) && + (urb->transfer_flags & URB_DMA_MAP_PAGE)) { dma_unmap_page(hcd->self.sysdev, urb->transfer_dma, urb->transfer_buffer_length, dir); - else if (IS_ENABLED(CONFIG_HAS_DMA) && - (urb->transfer_flags & URB_DMA_MAP_SINGLE)) + } else if (IS_ENABLED(CONFIG_HAS_DMA) && + (urb->transfer_flags & URB_DMA_MAP_SINGLE)) { dma_unmap_single(hcd->self.sysdev, urb->transfer_dma, urb->transfer_buffer_length, dir); - else if (urb->transfer_flags & URB_MAP_LOCAL) + } else if (urb->transfer_flags & URB_MAP_LOCAL) { hcd_free_coherent(urb->dev->bus, &urb->transfer_dma, &urb->transfer_buffer, urb->transfer_buffer_length, dir); + } else if ((urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP) && urb->sgt) { + dma_sync_sgtable_for_cpu(hcd->self.sysdev, urb->sgt, dir); + if (dir == DMA_FROM_DEVICE) + invalidate_kernel_vmap_range(urb->transfer_buffer, + urb->transfer_buffer_length); + } /* Make it safe to call this routine more than once */ urb->transfer_flags &= ~(URB_DMA_MAP_SG | URB_DMA_MAP_PAGE | @@ -1521,11 +1402,18 @@ int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, 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; } @@ -1539,23 +1427,29 @@ int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, 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 (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP) { + if (!urb->sgt) + return 0; + + if (dir == DMA_TO_DEVICE) + flush_kernel_vmap_range(urb->transfer_buffer, + urb->transfer_buffer_length); + dma_sync_sgtable_for_device(hcd->self.sysdev, urb->sgt, dir); + } else if (urb->transfer_buffer_length != 0) { + 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; @@ -1570,7 +1464,7 @@ int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, urb->sg, urb->num_sgs, dir); - if (n <= 0) + if (!n) ret = -EAGAIN; else urb->transfer_flags |= URB_DMA_MAP_SG; @@ -1591,9 +1485,6 @@ int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, 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; @@ -1609,15 +1500,6 @@ int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, 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))) @@ -1672,6 +1554,13 @@ int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags) urb->hcpriv = NULL; INIT_LIST_HEAD(&urb->urb_list); atomic_dec(&urb->use_count); + /* + * Order the write of urb->use_count above before the read + * of urb->reject below. Pairs with the memory barriers in + * usb_kill_urb() and usb_poison_urb(). + */ + smp_mb__after_atomic(); + atomic_dec(&urb->dev->urbnum); if (atomic_read(&urb->reject)) wake_up(&usb_kill_urb_queue); @@ -1733,7 +1622,7 @@ int usb_hcd_unlink_urb (struct urb *urb, int status) if (retval == 0) retval = -EINPROGRESS; else if (retval != -EIDRM && retval != -EBUSY) - dev_dbg(&udev->dev, "hcd_unlink_urb %pK fail %d\n", + dev_dbg(&udev->dev, "hcd_unlink_urb %p fail %d\n", urb, retval); usb_put_dev(udev); } @@ -1747,7 +1636,6 @@ static void __usb_hcd_giveback_urb(struct urb *urb) 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) && @@ -1764,36 +1652,37 @@ static void __usb_hcd_giveback_urb(struct urb *urb) /* 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); + kcov_remote_start_usb_softirq((u64)urb->dev->bus->busnum); urb->complete(urb); - local_irq_restore(flags); + kcov_remote_stop_softirq(); usb_anchor_resume_wakeups(anchor); atomic_dec(&urb->use_count); + /* + * Order the write of urb->use_count above before the read + * of urb->reject below. Pairs with the memory barriers in + * usb_kill_urb() and usb_poison_urb(). + */ + smp_mb__after_atomic(); + if (unlikely(atomic_read(&urb->reject))) wake_up(&usb_kill_urb_queue); usb_put_urb(urb); } -static void usb_giveback_urb_bh(unsigned long param) +static void usb_giveback_urb_bh(struct work_struct *work) { - struct giveback_urb_bh *bh = (struct giveback_urb_bh *)param; + struct giveback_urb_bh *bh = + container_of(work, struct giveback_urb_bh, bh); struct list_head local_list; spin_lock_irq(&bh->lock); bh->running = true; - restart: list_replace_init(&bh->head, &local_list); spin_unlock_irq(&bh->lock); @@ -1807,10 +1696,17 @@ static void usb_giveback_urb_bh(unsigned long param) bh->completing_ep = NULL; } - /* check if there are new URBs to giveback */ + /* + * giveback new URBs next time to prevent this function + * from not exiting for a long time. + */ spin_lock_irq(&bh->lock); - if (!list_empty(&bh->head)) - goto restart; + if (!list_empty(&bh->head)) { + if (bh->high_prio) + queue_work(system_bh_highpri_wq, &bh->bh); + else + queue_work(system_bh_wq, &bh->bh); + } bh->running = false; spin_unlock_irq(&bh->lock); } @@ -1820,7 +1716,11 @@ static void usb_giveback_urb_bh(unsigned long param) * @hcd: host controller returning the URB * @urb: urb being returned to the USB device driver. * @status: completion status code for the URB. - * Context: in_interrupt() + * + * Context: atomic. The completion callback is invoked either in a work queue + * (BH) context or in the caller's context, depending on whether the HCD_BH + * flag is set in the @hcd structure, except that URBs submitted to the + * root hub always complete in BH context. * * This hands the URB from HCD to its USB device driver, using its * completion function. The HCD has freed all per-urb resources @@ -1835,9 +1735,9 @@ static void usb_giveback_urb_bh(unsigned long param) void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status) { struct giveback_urb_bh *bh; - bool running, high_prio_bh; + bool running; - /* pass status to tasklet via unlinked */ + /* pass status to BH via unlinked */ if (likely(!urb->unlinked)) urb->unlinked = status; @@ -1846,13 +1746,10 @@ void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status) return; } - if (usb_pipeisoc(urb->pipe) || usb_pipeint(urb->pipe)) { + if (usb_pipeisoc(urb->pipe) || usb_pipeint(urb->pipe)) bh = &hcd->high_prio_bh; - high_prio_bh = true; - } else { + else bh = &hcd->low_prio_bh; - high_prio_bh = false; - } spin_lock(&bh->lock); list_add_tail(&urb->urb_list, &bh->head); @@ -1861,10 +1758,10 @@ void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status) if (running) ; - else if (high_prio_bh) - tasklet_hi_schedule(&bh->bh); + else if (bh->high_prio) + queue_work(system_bh_highpri_wq, &bh->bh); else - tasklet_schedule(&bh->bh); + queue_work(system_bh_wq, &bh->bh); } EXPORT_SYMBOL_GPL(usb_hcd_giveback_urb); @@ -1888,7 +1785,7 @@ void usb_hcd_flush_endpoint(struct usb_device *udev, /* No more submits can occur */ spin_lock_irq(&hcd_urb_list_lock); rescan: - list_for_each_entry (urb, &ep->urb_list, urb_list) { + list_for_each_entry_reverse(urb, &ep->urb_list, urb_list) { int is_in; if (urb->unlinked) @@ -1900,23 +1797,10 @@ rescan: /* kick hcd */ unlink1(hcd, urb, -ESHUTDOWN); dev_dbg (hcd->self.controller, - "shutdown urb %pK ep%d%s%s\n", + "shutdown urb %p 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 */ @@ -2243,6 +2127,135 @@ int usb_hcd_get_frame_number (struct usb_device *udev) } /*-------------------------------------------------------------------------*/ +#ifdef CONFIG_USB_HCD_TEST_MODE + +static void usb_ehset_completion(struct urb *urb) +{ + struct completion *done = urb->context; + + complete(done); +} +/* + * Allocate and initialize a control URB. This request will be used by the + * EHSET SINGLE_STEP_SET_FEATURE test in which the DATA and STATUS stages + * of the GetDescriptor request are sent 15 seconds after the SETUP stage. + * Return NULL if failed. + */ +static struct urb *request_single_step_set_feature_urb( + struct usb_device *udev, + void *dr, + void *buf, + struct completion *done) +{ + struct urb *urb; + struct usb_hcd *hcd = bus_to_hcd(udev->bus); + + urb = usb_alloc_urb(0, GFP_KERNEL); + if (!urb) + return NULL; + + urb->pipe = usb_rcvctrlpipe(udev, 0); + + urb->ep = &udev->ep0; + urb->dev = udev; + urb->setup_packet = (void *)dr; + urb->transfer_buffer = buf; + urb->transfer_buffer_length = USB_DT_DEVICE_SIZE; + urb->complete = usb_ehset_completion; + urb->status = -EINPROGRESS; + urb->actual_length = 0; + urb->transfer_flags = URB_DIR_IN | URB_NO_TRANSFER_DMA_MAP; + usb_get_urb(urb); + atomic_inc(&urb->use_count); + atomic_inc(&urb->dev->urbnum); + if (map_urb_for_dma(hcd, urb, GFP_KERNEL)) { + usb_put_urb(urb); + usb_free_urb(urb); + return NULL; + } + + urb->context = done; + return urb; +} + +int ehset_single_step_set_feature(struct usb_hcd *hcd, int port) +{ + int retval = -ENOMEM; + struct usb_ctrlrequest *dr; + struct urb *urb; + struct usb_device *udev; + struct usb_device_descriptor *buf; + DECLARE_COMPLETION_ONSTACK(done); + + /* Obtain udev of the rhub's child port */ + udev = usb_hub_find_child(hcd->self.root_hub, port); + if (!udev) { + dev_err(hcd->self.controller, "No device attached to the RootHub\n"); + return -ENODEV; + } + buf = kmalloc(USB_DT_DEVICE_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); + if (!dr) { + kfree(buf); + return -ENOMEM; + } + + /* Fill Setup packet for GetDescriptor */ + dr->bRequestType = USB_DIR_IN; + dr->bRequest = USB_REQ_GET_DESCRIPTOR; + dr->wValue = cpu_to_le16(USB_DT_DEVICE << 8); + dr->wIndex = 0; + dr->wLength = cpu_to_le16(USB_DT_DEVICE_SIZE); + urb = request_single_step_set_feature_urb(udev, dr, buf, &done); + if (!urb) + goto cleanup; + + /* Submit just the SETUP stage */ + retval = hcd->driver->submit_single_step_set_feature(hcd, urb, 1); + if (retval) + goto out1; + if (!wait_for_completion_timeout(&done, msecs_to_jiffies(2000))) { + usb_kill_urb(urb); + retval = -ETIMEDOUT; + dev_err(hcd->self.controller, + "%s SETUP stage timed out on ep0\n", __func__); + goto out1; + } + msleep(15 * 1000); + + /* Complete remaining DATA and STATUS stages using the same URB */ + urb->status = -EINPROGRESS; + urb->transfer_flags &= ~URB_NO_TRANSFER_DMA_MAP; + usb_get_urb(urb); + atomic_inc(&urb->use_count); + atomic_inc(&urb->dev->urbnum); + if (map_urb_for_dma(hcd, urb, GFP_KERNEL)) { + usb_put_urb(urb); + goto out1; + } + + retval = hcd->driver->submit_single_step_set_feature(hcd, urb, 0); + if (!retval && !wait_for_completion_timeout(&done, + msecs_to_jiffies(2000))) { + usb_kill_urb(urb); + retval = -ETIMEDOUT; + dev_err(hcd->self.controller, + "%s IN stage timed out on ep0\n", __func__); + } +out1: + usb_free_urb(urb); +cleanup: + kfree(dr); + kfree(buf); + return retval; +} +EXPORT_SYMBOL_GPL(ehset_single_step_set_feature); +#endif /* CONFIG_USB_HCD_TEST_MODE */ + +/*-------------------------------------------------------------------------*/ #ifdef CONFIG_PM @@ -2271,6 +2284,10 @@ int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg) usb_set_device_state(rhdev, USB_STATE_SUSPENDED); hcd->state = HC_STATE_SUSPENDED; + if (!PMSG_IS_AUTO(msg)) + usb_phy_roothub_suspend(hcd->self.sysdev, + hcd->phy_roothub); + /* Did we race with a root-hub wakeup event? */ if (rhdev->do_remote_wakeup) { char buffer[6]; @@ -2307,6 +2324,14 @@ int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg) dev_dbg(&rhdev->dev, "skipped %s of dead bus\n", "resume"); return 0; } + + if (!PMSG_IS_AUTO(msg)) { + status = usb_phy_roothub_resume(hcd->self.sysdev, + hcd->phy_roothub); + if (status) + return status; + } + if (!hcd->driver->bus_resume) return -ENOENT; if (HCD_RH_RUNNING(hcd)) @@ -2315,6 +2340,9 @@ int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg) 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; @@ -2344,6 +2372,7 @@ int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg) } } else { hcd->state = old_state; + usb_phy_roothub_suspend(hcd->self.sysdev, hcd->phy_roothub); dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", "resume", status); if (status != -ESHUTDOWN) @@ -2376,6 +2405,7 @@ void usb_hcd_resume_root_hub (struct usb_hcd *hcd) spin_lock_irqsave (&hcd_root_hub_lock, flags); if (hcd->rh_registered) { + pm_wakeup_event(&hcd->self.root_hub->dev, 0); set_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); queue_work(pm_wq, &hcd->wakeup_work); } @@ -2393,7 +2423,7 @@ EXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); * usb_bus_start_enum - start immediate enumeration (for OTG) * @bus: the bus (must use hcd framework) * @port_num: 1-based number of port; usually bus->otg_port - * Context: in_interrupt() + * Context: atomic * * Starts enumeration, with an immediate reset followed later by * hub_wq identifying and possibly configuring the device. @@ -2456,6 +2486,19 @@ EXPORT_SYMBOL_GPL(usb_hcd_irq); /*-------------------------------------------------------------------------*/ +/* 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 @@ -2485,6 +2528,8 @@ void usb_hc_died (struct usb_hcd *hcd) } if (usb_hcd_is_primary_hcd(hcd) && hcd->shared_hcd) { hcd = hcd->shared_hcd; + clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); + set_bit(HCD_FLAG_DEAD, &hcd->flags); if (hcd->rh_registered) { clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); @@ -2494,6 +2539,13 @@ void usb_hc_died (struct usb_hcd *hcd) 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. */ } @@ -2506,7 +2558,7 @@ static void init_giveback_urb_bh(struct giveback_urb_bh *bh) spin_lock_init(&bh->lock); INIT_LIST_HEAD(&bh->head); - tasklet_init(&bh->bh, usb_giveback_urb_bh, (unsigned long)bh); + INIT_WORK(&bh->bh, usb_giveback_urb_bh); } struct usb_hcd *__usb_create_hcd(const struct hc_driver *driver, @@ -2554,15 +2606,14 @@ struct usb_hcd *__usb_create_hcd(const struct hc_driver *driver, hcd->self.controller = dev; hcd->self.sysdev = sysdev; hcd->self.bus_name = bus_name; - hcd->self.uses_dma = (sysdev->dma_mask != NULL); - init_timer(&hcd->rh_timer); - hcd->rh_timer.function = rh_timer_func; - hcd->rh_timer.data = (unsigned long) hcd; + 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; hcd->product_desc = (driver->product_desc) ? driver->product_desc : @@ -2578,7 +2629,8 @@ EXPORT_SYMBOL_GPL(__usb_create_hcd); * @bus_name: value to store in hcd->self.bus_name * @primary_hcd: a pointer to the usb_hcd structure that is sharing the * PCI device. Only allocate certain resources for the primary HCD - * Context: !in_interrupt() + * + * Context: task context, might sleep. * * Allocate a struct usb_hcd, with extra space at the end for the * HC driver's private data. Initialize the generic members of the @@ -2600,7 +2652,8 @@ EXPORT_SYMBOL_GPL(usb_create_shared_hcd); * @driver: HC driver that will use this hcd * @dev: device for this HC, stored in hcd->self.controller * @bus_name: value to store in hcd->self.bus_name - * Context: !in_interrupt() + * + * Context: task context, might sleep. * * Allocate a struct usb_hcd, with extra space at the end for the * HC driver's private data. Initialize the generic members of the @@ -2643,18 +2696,18 @@ static void hcd_release(struct kref *kref) kfree(hcd); } -struct usb_hcd *usb_get_hcd (struct usb_hcd *hcd) +struct usb_hcd *usb_get_hcd(struct usb_hcd *hcd) { if (hcd) - kref_get (&hcd->kref); + kref_get(&hcd->kref); return hcd; } EXPORT_SYMBOL_GPL(usb_get_hcd); -void usb_put_hcd (struct usb_hcd *hcd) +void usb_put_hcd(struct usb_hcd *hcd) { if (hcd) - kref_put (&hcd->kref, hcd_release); + kref_put(&hcd->kref, hcd_release); } EXPORT_SYMBOL_GPL(usb_put_hcd); @@ -2694,14 +2747,14 @@ static int usb_hcd_request_irqs(struct usb_hcd *hcd, hcd->irq = irqnum; dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum, (hcd->driver->flags & HCD_MEMORY) ? - "io mem" : "io base", - (unsigned long long)hcd->rsrc_start); + "io mem" : "io port", + (unsigned long long)hcd->rsrc_start); } else { hcd->irq = 0; if (hcd->rsrc_start) dev_info(hcd->self.controller, "%s 0x%08llx\n", (hcd->driver->flags & HCD_MEMORY) ? - "io mem" : "io base", + "io mem" : "io port", (unsigned long long)hcd->rsrc_start); } return 0; @@ -2723,6 +2776,26 @@ static void usb_put_invalidate_rhdev(struct usb_hcd *hcd) } /** + * usb_stop_hcd - Halt the HCD + * @hcd: the usb_hcd that has to be halted + * + * Stop the root-hub polling timer and invoke the HCD's ->stop callback. + */ +static void usb_stop_hcd(struct usb_hcd *hcd) +{ + hcd->rh_pollable = 0; + clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); + timer_delete_sync(&hcd->rh_timer); + + hcd->driver->stop(hcd); + hcd->state = HC_STATE_HALT; + + /* In case the HCD restarted the timer, stop it again. */ + clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); + timer_delete_sync(&hcd->rh_timer); +} + +/** * usb_add_hcd - finish generic HCD structure initialization and register * @hcd: the usb_hcd structure to initialize * @irqnum: Interrupt line to allocate @@ -2737,63 +2810,60 @@ int usb_add_hcd(struct usb_hcd *hcd, { int retval; struct usb_device *rhdev; + struct usb_hcd *shared_hcd; + int skip_phy_initialization; - if (IS_ENABLED(CONFIG_USB_PHY) && !hcd->usb_phy) { - struct usb_phy *phy = usb_get_phy_dev(hcd->self.sysdev, 0); + if (usb_hcd_is_primary_hcd(hcd)) + skip_phy_initialization = hcd->skip_phy_initialization; + else + skip_phy_initialization = hcd->primary_hcd->skip_phy_initialization; - if (IS_ERR(phy)) { - retval = PTR_ERR(phy); - if (retval == -EPROBE_DEFER) - return retval; + if (!skip_phy_initialization) { + if (usb_hcd_is_primary_hcd(hcd)) { + hcd->phy_roothub = usb_phy_roothub_alloc(hcd->self.sysdev); + if (IS_ERR(hcd->phy_roothub)) + return PTR_ERR(hcd->phy_roothub); } else { - retval = usb_phy_init(phy); - if (retval) { - usb_put_phy(phy); - return retval; - } - hcd->usb_phy = phy; - hcd->remove_phy = 1; + hcd->phy_roothub = usb_phy_roothub_alloc_usb3_phy(hcd->self.sysdev); + if (IS_ERR(hcd->phy_roothub)) + return PTR_ERR(hcd->phy_roothub); } - } - if (IS_ENABLED(CONFIG_GENERIC_PHY) && !hcd->phy) { - struct phy *phy = phy_get(hcd->self.sysdev, "usb"); + retval = usb_phy_roothub_init(hcd->phy_roothub); + 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; - if (IS_ERR(phy)) { - retval = PTR_ERR(phy); - if (retval == -EPROBE_DEFER) - goto err_phy; - } else { - retval = phy_init(phy); - if (retval) { - phy_put(phy); - goto err_phy; - } - retval = phy_power_on(phy); - if (retval) { - phy_exit(phy); - phy_put(phy); - goto err_phy; - } - hcd->phy = phy; - hcd->remove_phy = 1; - } + retval = usb_phy_roothub_power_on(hcd->phy_roothub); + if (retval) + goto err_usb_phy_roothub_power_on; } 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_INTERNAL: + hcd->dev_policy = USB_DEVICE_AUTHORIZE_INTERNAL; + break; + + case USB_AUTHORIZE_ALL: + case USB_AUTHORIZE_WIRED: + default: + hcd->dev_policy = USB_DEVICE_AUTHORIZE_ALL; + break; } + set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); /* per default all interfaces are authorized */ @@ -2823,6 +2893,10 @@ int usb_add_hcd(struct usb_hcd *hcd, hcd->self.root_hub = rhdev; mutex_unlock(&usb_port_peer_mutex); + rhdev->rx_lanes = 1; + rhdev->tx_lanes = 1; + rhdev->ssp_rate = USB_SSP_GEN_UNKNOWN; + switch (hcd->speed) { case HCD_USB11: rhdev->speed = USB_SPEED_FULL; @@ -2830,13 +2904,17 @@ int usb_add_hcd(struct usb_hcd *hcd, case HCD_USB2: rhdev->speed = USB_SPEED_HIGH; break; - case HCD_USB25: - rhdev->speed = USB_SPEED_WIRELESS; - break; case HCD_USB3: rhdev->speed = USB_SPEED_SUPER; break; + case HCD_USB32: + rhdev->rx_lanes = 2; + rhdev->tx_lanes = 2; + rhdev->ssp_rate = USB_SSP_GEN_2x2; + rhdev->speed = USB_SPEED_SUPER_PLUS; + break; case HCD_USB31: + rhdev->ssp_rate = USB_SSP_GEN_2x1; rhdev->speed = USB_SPEED_SUPER_PLUS; break; default: @@ -2869,13 +2947,18 @@ int usb_add_hcd(struct usb_hcd *hcd, } 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)) dev_dbg(hcd->self.controller, "supports USB remote wakeup\n"); - /* initialize tasklets */ + /* initialize BHs */ init_giveback_urb_bh(&hcd->high_prio_bh); + hcd->high_prio_bh.high_prio = true; init_giveback_urb_bh(&hcd->low_prio_bh); /* enable irqs just before we start the controller, @@ -2894,44 +2977,31 @@ int usb_add_hcd(struct usb_hcd *hcd, goto err_hcd_driver_start; } + /* 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; + + if (shared_hcd->uses_new_polling && HCD_POLL_RH(shared_hcd)) + usb_hcd_poll_rh_status(shared_hcd); + } + /* starting here, usbcore will pay attention to this root hub */ - retval = register_root_hub(hcd); - if (retval != 0) - goto err_register_root_hub; + if (!HCD_DEFER_RH_REGISTER(hcd)) { + retval = register_root_hub(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 (hcd->uses_new_polling && HCD_POLL_RH(hcd)) + usb_hcd_poll_rh_status(hcd); } - 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); - del_timer_sync(&hcd->rh_timer); - hcd->driver->stop(hcd); - hcd->state = HC_STATE_HALT; - clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); - del_timer_sync(&hcd->rh_timer); + usb_stop_hcd(hcd); err_hcd_driver_start: if (usb_hcd_is_primary_hcd(hcd) && hcd->irq > 0) free_irq(irqnum, hcd); @@ -2944,18 +3014,10 @@ err_allocate_root_hub: err_register_bus: hcd_buffer_destroy(hcd); err_create_buf: - if (IS_ENABLED(CONFIG_GENERIC_PHY) && hcd->remove_phy && hcd->phy) { - phy_power_off(hcd->phy); - phy_exit(hcd->phy); - phy_put(hcd->phy); - hcd->phy = NULL; - } -err_phy: - if (hcd->remove_phy && hcd->usb_phy) { - usb_phy_shutdown(hcd->usb_phy); - usb_put_phy(hcd->usb_phy); - hcd->usb_phy = NULL; - } + usb_phy_roothub_power_off(hcd->phy_roothub); +err_usb_phy_roothub_power_on: + usb_phy_roothub_exit(hcd->phy_roothub); + return retval; } EXPORT_SYMBOL_GPL(usb_add_hcd); @@ -2963,39 +3025,48 @@ EXPORT_SYMBOL_GPL(usb_add_hcd); /** * usb_remove_hcd - shutdown processing for generic HCDs * @hcd: the usb_hcd structure to remove - * Context: !in_interrupt() + * + * Context: task context, might sleep. * * Disconnects the root hub, then reverses the effects of usb_add_hcd(), * invoking the HCD's stop() method. */ void usb_remove_hcd(struct usb_hcd *hcd) { - struct usb_device *rhdev = hcd->self.root_hub; + struct usb_device *rhdev; + bool rh_registered; + + if (!hcd) { + pr_debug("%s: hcd is NULL\n", __func__); + return; + } + rhdev = hcd->self.root_hub; 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); /* - * tasklet_kill() isn't needed here because: + * flush_work() isn't needed here because: * - driver's disconnect() called from usb_disconnect() should * make sure its URBs are completed during the disconnect() * callback @@ -3009,16 +3080,7 @@ void usb_remove_hcd(struct usb_hcd *hcd) * interrupt occurs), but usb_hcd_poll_rh_status() won't invoke * the hub_status_data() callback. */ - hcd->rh_pollable = 0; - clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); - del_timer_sync(&hcd->rh_timer); - - hcd->driver->stop(hcd); - hcd->state = HC_STATE_HALT; - - /* In case the HCD restarted the timer, stop it again. */ - clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); - del_timer_sync(&hcd->rh_timer); + usb_stop_hcd(hcd); if (usb_hcd_is_primary_hcd(hcd)) { if (hcd->irq > 0) @@ -3028,17 +3090,8 @@ void usb_remove_hcd(struct usb_hcd *hcd) usb_deregister_bus(&hcd->self); hcd_buffer_destroy(hcd); - if (IS_ENABLED(CONFIG_GENERIC_PHY) && hcd->remove_phy && hcd->phy) { - phy_power_off(hcd->phy); - phy_exit(hcd->phy); - phy_put(hcd->phy); - hcd->phy = NULL; - } - if (hcd->remove_phy && hcd->usb_phy) { - usb_phy_shutdown(hcd->usb_phy); - usb_put_phy(hcd->usb_phy); - hcd->usb_phy = NULL; - } + usb_phy_roothub_power_off(hcd->phy_roothub); + usb_phy_roothub_exit(hcd->phy_roothub); usb_put_invalidate_rhdev(hcd); hcd->flags = 0; @@ -3050,11 +3103,62 @@ usb_hcd_platform_shutdown(struct platform_device *dev) { struct usb_hcd *hcd = platform_get_drvdata(dev); + /* No need for pm_runtime_put(), we're shutting down */ + pm_runtime_get_sync(&dev->dev); + if (hcd->driver->shutdown) hcd->driver->shutdown(hcd); } 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); + + /* + * if a physical SRAM address was passed, map it, otherwise + * allocate system memory as a buffer. + */ + if (phys_addr) + local_mem = devm_memremap(hcd->self.sysdev, phys_addr, + size, MEMREMAP_WC); + else + local_mem = dmam_alloc_attrs(hcd->self.sysdev, size, &dma, + GFP_KERNEL, + DMA_ATTR_WRITE_COMBINE); + + if (IS_ERR_OR_NULL(local_mem)) { + if (!local_mem) + return -ENOMEM; + + 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) |