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- // SPDX-License-Identifier: GPL-2.0
- /*
- * (C) Copyright 2002-2004, 2007 Greg Kroah-Hartman <greg@kroah.com>
- * (C) Copyright 2007 Novell Inc.
- */
- #include <linux/pci.h>
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/device.h>
- #include <linux/mempolicy.h>
- #include <linux/string.h>
- #include <linux/slab.h>
- #include <linux/sched.h>
- #include <linux/sched/isolation.h>
- #include <linux/cpu.h>
- #include <linux/pm_runtime.h>
- #include <linux/suspend.h>
- #include <linux/kexec.h>
- #include <linux/of_device.h>
- #include <linux/acpi.h>
- #include <linux/dma-map-ops.h>
- #include "pci.h"
- #include "pcie/portdrv.h"
- struct pci_dynid {
- struct list_head node;
- struct pci_device_id id;
- };
- /**
- * pci_add_dynid - add a new PCI device ID to this driver and re-probe devices
- * @drv: target pci driver
- * @vendor: PCI vendor ID
- * @device: PCI device ID
- * @subvendor: PCI subvendor ID
- * @subdevice: PCI subdevice ID
- * @class: PCI class
- * @class_mask: PCI class mask
- * @driver_data: private driver data
- *
- * Adds a new dynamic pci device ID to this driver and causes the
- * driver to probe for all devices again. @drv must have been
- * registered prior to calling this function.
- *
- * CONTEXT:
- * Does GFP_KERNEL allocation.
- *
- * RETURNS:
- * 0 on success, -errno on failure.
- */
- int pci_add_dynid(struct pci_driver *drv,
- unsigned int vendor, unsigned int device,
- unsigned int subvendor, unsigned int subdevice,
- unsigned int class, unsigned int class_mask,
- unsigned long driver_data)
- {
- struct pci_dynid *dynid;
- dynid = kzalloc(sizeof(*dynid), GFP_KERNEL);
- if (!dynid)
- return -ENOMEM;
- dynid->id.vendor = vendor;
- dynid->id.device = device;
- dynid->id.subvendor = subvendor;
- dynid->id.subdevice = subdevice;
- dynid->id.class = class;
- dynid->id.class_mask = class_mask;
- dynid->id.driver_data = driver_data;
- spin_lock(&drv->dynids.lock);
- list_add_tail(&dynid->node, &drv->dynids.list);
- spin_unlock(&drv->dynids.lock);
- return driver_attach(&drv->driver);
- }
- EXPORT_SYMBOL_GPL(pci_add_dynid);
- static void pci_free_dynids(struct pci_driver *drv)
- {
- struct pci_dynid *dynid, *n;
- spin_lock(&drv->dynids.lock);
- list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
- list_del(&dynid->node);
- kfree(dynid);
- }
- spin_unlock(&drv->dynids.lock);
- }
- /**
- * store_new_id - sysfs frontend to pci_add_dynid()
- * @driver: target device driver
- * @buf: buffer for scanning device ID data
- * @count: input size
- *
- * Allow PCI IDs to be added to an existing driver via sysfs.
- */
- static ssize_t new_id_store(struct device_driver *driver, const char *buf,
- size_t count)
- {
- struct pci_driver *pdrv = to_pci_driver(driver);
- const struct pci_device_id *ids = pdrv->id_table;
- u32 vendor, device, subvendor = PCI_ANY_ID,
- subdevice = PCI_ANY_ID, class = 0, class_mask = 0;
- unsigned long driver_data = 0;
- int fields = 0;
- int retval = 0;
- fields = sscanf(buf, "%x %x %x %x %x %x %lx",
- &vendor, &device, &subvendor, &subdevice,
- &class, &class_mask, &driver_data);
- if (fields < 2)
- return -EINVAL;
- if (fields != 7) {
- struct pci_dev *pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
- if (!pdev)
- return -ENOMEM;
- pdev->vendor = vendor;
- pdev->device = device;
- pdev->subsystem_vendor = subvendor;
- pdev->subsystem_device = subdevice;
- pdev->class = class;
- if (pci_match_id(pdrv->id_table, pdev))
- retval = -EEXIST;
- kfree(pdev);
- if (retval)
- return retval;
- }
- /* Only accept driver_data values that match an existing id_table
- entry */
- if (ids) {
- retval = -EINVAL;
- while (ids->vendor || ids->subvendor || ids->class_mask) {
- if (driver_data == ids->driver_data) {
- retval = 0;
- break;
- }
- ids++;
- }
- if (retval) /* No match */
- return retval;
- }
- retval = pci_add_dynid(pdrv, vendor, device, subvendor, subdevice,
- class, class_mask, driver_data);
- if (retval)
- return retval;
- return count;
- }
- static DRIVER_ATTR_WO(new_id);
- /**
- * store_remove_id - remove a PCI device ID from this driver
- * @driver: target device driver
- * @buf: buffer for scanning device ID data
- * @count: input size
- *
- * Removes a dynamic pci device ID to this driver.
- */
- static ssize_t remove_id_store(struct device_driver *driver, const char *buf,
- size_t count)
- {
- struct pci_dynid *dynid, *n;
- struct pci_driver *pdrv = to_pci_driver(driver);
- u32 vendor, device, subvendor = PCI_ANY_ID,
- subdevice = PCI_ANY_ID, class = 0, class_mask = 0;
- int fields = 0;
- size_t retval = -ENODEV;
- fields = sscanf(buf, "%x %x %x %x %x %x",
- &vendor, &device, &subvendor, &subdevice,
- &class, &class_mask);
- if (fields < 2)
- return -EINVAL;
- spin_lock(&pdrv->dynids.lock);
- list_for_each_entry_safe(dynid, n, &pdrv->dynids.list, node) {
- struct pci_device_id *id = &dynid->id;
- if ((id->vendor == vendor) &&
- (id->device == device) &&
- (subvendor == PCI_ANY_ID || id->subvendor == subvendor) &&
- (subdevice == PCI_ANY_ID || id->subdevice == subdevice) &&
- !((id->class ^ class) & class_mask)) {
- list_del(&dynid->node);
- kfree(dynid);
- retval = count;
- break;
- }
- }
- spin_unlock(&pdrv->dynids.lock);
- return retval;
- }
- static DRIVER_ATTR_WO(remove_id);
- static struct attribute *pci_drv_attrs[] = {
- &driver_attr_new_id.attr,
- &driver_attr_remove_id.attr,
- NULL,
- };
- ATTRIBUTE_GROUPS(pci_drv);
- /**
- * pci_match_id - See if a pci device matches a given pci_id table
- * @ids: array of PCI device id structures to search in
- * @dev: the PCI device structure to match against.
- *
- * Used by a driver to check whether a PCI device present in the
- * system is in its list of supported devices. Returns the matching
- * pci_device_id structure or %NULL if there is no match.
- *
- * Deprecated, don't use this as it will not catch any dynamic ids
- * that a driver might want to check for.
- */
- const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
- struct pci_dev *dev)
- {
- if (ids) {
- while (ids->vendor || ids->subvendor || ids->class_mask) {
- if (pci_match_one_device(ids, dev))
- return ids;
- ids++;
- }
- }
- return NULL;
- }
- EXPORT_SYMBOL(pci_match_id);
- static const struct pci_device_id pci_device_id_any = {
- .vendor = PCI_ANY_ID,
- .device = PCI_ANY_ID,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- };
- /**
- * pci_match_device - Tell if a PCI device structure has a matching PCI device id structure
- * @drv: the PCI driver to match against
- * @dev: the PCI device structure to match against
- *
- * Used by a driver to check whether a PCI device present in the
- * system is in its list of supported devices. Returns the matching
- * pci_device_id structure or %NULL if there is no match.
- */
- static const struct pci_device_id *pci_match_device(struct pci_driver *drv,
- struct pci_dev *dev)
- {
- struct pci_dynid *dynid;
- const struct pci_device_id *found_id = NULL;
- /* When driver_override is set, only bind to the matching driver */
- if (dev->driver_override && strcmp(dev->driver_override, drv->name))
- return NULL;
- /* Look at the dynamic ids first, before the static ones */
- spin_lock(&drv->dynids.lock);
- list_for_each_entry(dynid, &drv->dynids.list, node) {
- if (pci_match_one_device(&dynid->id, dev)) {
- found_id = &dynid->id;
- break;
- }
- }
- spin_unlock(&drv->dynids.lock);
- if (!found_id)
- found_id = pci_match_id(drv->id_table, dev);
- /* driver_override will always match, send a dummy id */
- if (!found_id && dev->driver_override)
- found_id = &pci_device_id_any;
- return found_id;
- }
- struct drv_dev_and_id {
- struct pci_driver *drv;
- struct pci_dev *dev;
- const struct pci_device_id *id;
- };
- static long local_pci_probe(void *_ddi)
- {
- struct drv_dev_and_id *ddi = _ddi;
- struct pci_dev *pci_dev = ddi->dev;
- struct pci_driver *pci_drv = ddi->drv;
- struct device *dev = &pci_dev->dev;
- int rc;
- /*
- * Unbound PCI devices are always put in D0, regardless of
- * runtime PM status. During probe, the device is set to
- * active and the usage count is incremented. If the driver
- * supports runtime PM, it should call pm_runtime_put_noidle(),
- * or any other runtime PM helper function decrementing the usage
- * count, in its probe routine and pm_runtime_get_noresume() in
- * its remove routine.
- */
- pm_runtime_get_sync(dev);
- pci_dev->driver = pci_drv;
- rc = pci_drv->probe(pci_dev, ddi->id);
- if (!rc)
- return rc;
- if (rc < 0) {
- pci_dev->driver = NULL;
- pm_runtime_put_sync(dev);
- return rc;
- }
- /*
- * Probe function should return < 0 for failure, 0 for success
- * Treat values > 0 as success, but warn.
- */
- pci_warn(pci_dev, "Driver probe function unexpectedly returned %d\n",
- rc);
- return 0;
- }
- static bool pci_physfn_is_probed(struct pci_dev *dev)
- {
- #ifdef CONFIG_PCI_IOV
- return dev->is_virtfn && dev->physfn->is_probed;
- #else
- return false;
- #endif
- }
- static int pci_call_probe(struct pci_driver *drv, struct pci_dev *dev,
- const struct pci_device_id *id)
- {
- int error, node, cpu;
- int hk_flags = HK_FLAG_DOMAIN | HK_FLAG_WQ;
- struct drv_dev_and_id ddi = { drv, dev, id };
- /*
- * Execute driver initialization on node where the device is
- * attached. This way the driver likely allocates its local memory
- * on the right node.
- */
- node = dev_to_node(&dev->dev);
- dev->is_probed = 1;
- cpu_hotplug_disable();
- /*
- * Prevent nesting work_on_cpu() for the case where a Virtual Function
- * device is probed from work_on_cpu() of the Physical device.
- */
- if (node < 0 || node >= MAX_NUMNODES || !node_online(node) ||
- pci_physfn_is_probed(dev))
- cpu = nr_cpu_ids;
- else
- cpu = cpumask_any_and(cpumask_of_node(node),
- housekeeping_cpumask(hk_flags));
- if (cpu < nr_cpu_ids)
- error = work_on_cpu(cpu, local_pci_probe, &ddi);
- else
- error = local_pci_probe(&ddi);
- dev->is_probed = 0;
- cpu_hotplug_enable();
- return error;
- }
- /**
- * __pci_device_probe - check if a driver wants to claim a specific PCI device
- * @drv: driver to call to check if it wants the PCI device
- * @pci_dev: PCI device being probed
- *
- * returns 0 on success, else error.
- * side-effect: pci_dev->driver is set to drv when drv claims pci_dev.
- */
- static int __pci_device_probe(struct pci_driver *drv, struct pci_dev *pci_dev)
- {
- const struct pci_device_id *id;
- int error = 0;
- if (!pci_dev->driver && drv->probe) {
- error = -ENODEV;
- id = pci_match_device(drv, pci_dev);
- if (id)
- error = pci_call_probe(drv, pci_dev, id);
- }
- return error;
- }
- int __weak pcibios_alloc_irq(struct pci_dev *dev)
- {
- return 0;
- }
- void __weak pcibios_free_irq(struct pci_dev *dev)
- {
- }
- #ifdef CONFIG_PCI_IOV
- static inline bool pci_device_can_probe(struct pci_dev *pdev)
- {
- return (!pdev->is_virtfn || pdev->physfn->sriov->drivers_autoprobe ||
- pdev->driver_override);
- }
- #else
- static inline bool pci_device_can_probe(struct pci_dev *pdev)
- {
- return true;
- }
- #endif
- static int pci_device_probe(struct device *dev)
- {
- int error;
- struct pci_dev *pci_dev = to_pci_dev(dev);
- struct pci_driver *drv = to_pci_driver(dev->driver);
- if (!pci_device_can_probe(pci_dev))
- return -ENODEV;
- pci_assign_irq(pci_dev);
- error = pcibios_alloc_irq(pci_dev);
- if (error < 0)
- return error;
- pci_dev_get(pci_dev);
- error = __pci_device_probe(drv, pci_dev);
- if (error) {
- pcibios_free_irq(pci_dev);
- pci_dev_put(pci_dev);
- }
- return error;
- }
- static int pci_device_remove(struct device *dev)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- struct pci_driver *drv = pci_dev->driver;
- if (drv) {
- if (drv->remove) {
- pm_runtime_get_sync(dev);
- drv->remove(pci_dev);
- pm_runtime_put_noidle(dev);
- }
- pcibios_free_irq(pci_dev);
- pci_dev->driver = NULL;
- pci_iov_remove(pci_dev);
- }
- /* Undo the runtime PM settings in local_pci_probe() */
- pm_runtime_put_sync(dev);
- /*
- * If the device is still on, set the power state as "unknown",
- * since it might change by the next time we load the driver.
- */
- if (pci_dev->current_state == PCI_D0)
- pci_dev->current_state = PCI_UNKNOWN;
- /*
- * We would love to complain here if pci_dev->is_enabled is set, that
- * the driver should have called pci_disable_device(), but the
- * unfortunate fact is there are too many odd BIOS and bridge setups
- * that don't like drivers doing that all of the time.
- * Oh well, we can dream of sane hardware when we sleep, no matter how
- * horrible the crap we have to deal with is when we are awake...
- */
- pci_dev_put(pci_dev);
- return 0;
- }
- static void pci_device_shutdown(struct device *dev)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- struct pci_driver *drv = pci_dev->driver;
- pm_runtime_resume(dev);
- if (drv && drv->shutdown)
- drv->shutdown(pci_dev);
- /*
- * If this is a kexec reboot, turn off Bus Master bit on the
- * device to tell it to not continue to do DMA. Don't touch
- * devices in D3cold or unknown states.
- * If it is not a kexec reboot, firmware will hit the PCI
- * devices with big hammer and stop their DMA any way.
- */
- if (kexec_in_progress && (pci_dev->current_state <= PCI_D3hot))
- pci_clear_master(pci_dev);
- }
- #ifdef CONFIG_PM
- /* Auxiliary functions used for system resume and run-time resume. */
- /**
- * pci_restore_standard_config - restore standard config registers of PCI device
- * @pci_dev: PCI device to handle
- */
- static int pci_restore_standard_config(struct pci_dev *pci_dev)
- {
- pci_update_current_state(pci_dev, PCI_UNKNOWN);
- if (pci_dev->current_state != PCI_D0) {
- int error = pci_set_power_state(pci_dev, PCI_D0);
- if (error)
- return error;
- }
- pci_restore_state(pci_dev);
- pci_pme_restore(pci_dev);
- return 0;
- }
- static void pci_pm_default_resume(struct pci_dev *pci_dev)
- {
- pci_fixup_device(pci_fixup_resume, pci_dev);
- pci_enable_wake(pci_dev, PCI_D0, false);
- }
- #endif
- #ifdef CONFIG_PM_SLEEP
- static void pci_pm_default_resume_early(struct pci_dev *pci_dev)
- {
- pci_power_up(pci_dev);
- pci_update_current_state(pci_dev, PCI_D0);
- pci_restore_state(pci_dev);
- pci_pme_restore(pci_dev);
- }
- /*
- * Default "suspend" method for devices that have no driver provided suspend,
- * or not even a driver at all (second part).
- */
- static void pci_pm_set_unknown_state(struct pci_dev *pci_dev)
- {
- /*
- * mark its power state as "unknown", since we don't know if
- * e.g. the BIOS will change its device state when we suspend.
- */
- if (pci_dev->current_state == PCI_D0)
- pci_dev->current_state = PCI_UNKNOWN;
- }
- /*
- * Default "resume" method for devices that have no driver provided resume,
- * or not even a driver at all (second part).
- */
- static int pci_pm_reenable_device(struct pci_dev *pci_dev)
- {
- int retval;
- /* if the device was enabled before suspend, reenable */
- retval = pci_reenable_device(pci_dev);
- /*
- * if the device was busmaster before the suspend, make it busmaster
- * again
- */
- if (pci_dev->is_busmaster)
- pci_set_master(pci_dev);
- return retval;
- }
- static int pci_legacy_suspend(struct device *dev, pm_message_t state)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- struct pci_driver *drv = pci_dev->driver;
- if (drv && drv->suspend) {
- pci_power_t prev = pci_dev->current_state;
- int error;
- error = drv->suspend(pci_dev, state);
- suspend_report_result(drv->suspend, error);
- if (error)
- return error;
- if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
- && pci_dev->current_state != PCI_UNKNOWN) {
- pci_WARN_ONCE(pci_dev, pci_dev->current_state != prev,
- "PCI PM: Device state not saved by %pS\n",
- drv->suspend);
- }
- }
- pci_fixup_device(pci_fixup_suspend, pci_dev);
- return 0;
- }
- static int pci_legacy_suspend_late(struct device *dev, pm_message_t state)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- if (!pci_dev->state_saved)
- pci_save_state(pci_dev);
- pci_pm_set_unknown_state(pci_dev);
- pci_fixup_device(pci_fixup_suspend_late, pci_dev);
- return 0;
- }
- static int pci_legacy_resume(struct device *dev)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- struct pci_driver *drv = pci_dev->driver;
- pci_fixup_device(pci_fixup_resume, pci_dev);
- return drv && drv->resume ?
- drv->resume(pci_dev) : pci_pm_reenable_device(pci_dev);
- }
- /* Auxiliary functions used by the new power management framework */
- static void pci_pm_default_suspend(struct pci_dev *pci_dev)
- {
- /* Disable non-bridge devices without PM support */
- if (!pci_has_subordinate(pci_dev))
- pci_disable_enabled_device(pci_dev);
- }
- static bool pci_has_legacy_pm_support(struct pci_dev *pci_dev)
- {
- struct pci_driver *drv = pci_dev->driver;
- bool ret = drv && (drv->suspend || drv->resume);
- /*
- * Legacy PM support is used by default, so warn if the new framework is
- * supported as well. Drivers are supposed to support either the
- * former, or the latter, but not both at the same time.
- */
- pci_WARN(pci_dev, ret && drv->driver.pm, "device %04x:%04x\n",
- pci_dev->vendor, pci_dev->device);
- return ret;
- }
- /* New power management framework */
- static int pci_pm_prepare(struct device *dev)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
- if (pm && pm->prepare) {
- int error = pm->prepare(dev);
- if (error < 0)
- return error;
- if (!error && dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_PREPARE))
- return 0;
- }
- if (pci_dev_need_resume(pci_dev))
- return 0;
- /*
- * The PME setting needs to be adjusted here in case the direct-complete
- * optimization is used with respect to this device.
- */
- pci_dev_adjust_pme(pci_dev);
- return 1;
- }
- static void pci_pm_complete(struct device *dev)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- pci_dev_complete_resume(pci_dev);
- pm_generic_complete(dev);
- /* Resume device if platform firmware has put it in reset-power-on */
- if (pm_runtime_suspended(dev) && pm_resume_via_firmware()) {
- pci_power_t pre_sleep_state = pci_dev->current_state;
- pci_refresh_power_state(pci_dev);
- /*
- * On platforms with ACPI this check may also trigger for
- * devices sharing power resources if one of those power
- * resources has been activated as a result of a change of the
- * power state of another device sharing it. However, in that
- * case it is also better to resume the device, in general.
- */
- if (pci_dev->current_state < pre_sleep_state)
- pm_request_resume(dev);
- }
- }
- #else /* !CONFIG_PM_SLEEP */
- #define pci_pm_prepare NULL
- #define pci_pm_complete NULL
- #endif /* !CONFIG_PM_SLEEP */
- #ifdef CONFIG_SUSPEND
- static void pcie_pme_root_status_cleanup(struct pci_dev *pci_dev)
- {
- /*
- * Some BIOSes forget to clear Root PME Status bits after system
- * wakeup, which breaks ACPI-based runtime wakeup on PCI Express.
- * Clear those bits now just in case (shouldn't hurt).
- */
- if (pci_is_pcie(pci_dev) &&
- (pci_pcie_type(pci_dev) == PCI_EXP_TYPE_ROOT_PORT ||
- pci_pcie_type(pci_dev) == PCI_EXP_TYPE_RC_EC))
- pcie_clear_root_pme_status(pci_dev);
- }
- static int pci_pm_suspend(struct device *dev)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
- pci_dev->skip_bus_pm = false;
- if (pci_has_legacy_pm_support(pci_dev))
- return pci_legacy_suspend(dev, PMSG_SUSPEND);
- if (!pm) {
- pci_pm_default_suspend(pci_dev);
- return 0;
- }
- /*
- * PCI devices suspended at run time may need to be resumed at this
- * point, because in general it may be necessary to reconfigure them for
- * system suspend. Namely, if the device is expected to wake up the
- * system from the sleep state, it may have to be reconfigured for this
- * purpose, or if the device is not expected to wake up the system from
- * the sleep state, it should be prevented from signaling wakeup events
- * going forward.
- *
- * Also if the driver of the device does not indicate that its system
- * suspend callbacks can cope with runtime-suspended devices, it is
- * better to resume the device from runtime suspend here.
- */
- if (!dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND) ||
- pci_dev_need_resume(pci_dev)) {
- pm_runtime_resume(dev);
- pci_dev->state_saved = false;
- } else {
- pci_dev_adjust_pme(pci_dev);
- }
- if (pm->suspend) {
- pci_power_t prev = pci_dev->current_state;
- int error;
- error = pm->suspend(dev);
- suspend_report_result(pm->suspend, error);
- if (error)
- return error;
- if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
- && pci_dev->current_state != PCI_UNKNOWN) {
- pci_WARN_ONCE(pci_dev, pci_dev->current_state != prev,
- "PCI PM: State of device not saved by %pS\n",
- pm->suspend);
- }
- }
- return 0;
- }
- static int pci_pm_suspend_late(struct device *dev)
- {
- if (dev_pm_skip_suspend(dev))
- return 0;
- pci_fixup_device(pci_fixup_suspend, to_pci_dev(dev));
- return pm_generic_suspend_late(dev);
- }
- static int pci_pm_suspend_noirq(struct device *dev)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
- if (dev_pm_skip_suspend(dev))
- return 0;
- if (pci_has_legacy_pm_support(pci_dev))
- return pci_legacy_suspend_late(dev, PMSG_SUSPEND);
- if (!pm) {
- pci_save_state(pci_dev);
- goto Fixup;
- }
- if (pm->suspend_noirq) {
- pci_power_t prev = pci_dev->current_state;
- int error;
- error = pm->suspend_noirq(dev);
- suspend_report_result(pm->suspend_noirq, error);
- if (error)
- return error;
- if (!pci_dev->state_saved && pci_dev->current_state != PCI_D0
- && pci_dev->current_state != PCI_UNKNOWN) {
- pci_WARN_ONCE(pci_dev, pci_dev->current_state != prev,
- "PCI PM: State of device not saved by %pS\n",
- pm->suspend_noirq);
- goto Fixup;
- }
- }
- if (pci_dev->skip_bus_pm) {
- /*
- * Either the device is a bridge with a child in D0 below it, or
- * the function is running for the second time in a row without
- * going through full resume, which is possible only during
- * suspend-to-idle in a spurious wakeup case. The device should
- * be in D0 at this point, but if it is a bridge, it may be
- * necessary to save its state.
- */
- if (!pci_dev->state_saved)
- pci_save_state(pci_dev);
- } else if (!pci_dev->state_saved) {
- pci_save_state(pci_dev);
- if (pci_power_manageable(pci_dev))
- pci_prepare_to_sleep(pci_dev);
- }
- pci_dbg(pci_dev, "PCI PM: Suspend power state: %s\n",
- pci_power_name(pci_dev->current_state));
- if (pci_dev->current_state == PCI_D0) {
- pci_dev->skip_bus_pm = true;
- /*
- * Per PCI PM r1.2, table 6-1, a bridge must be in D0 if any
- * downstream device is in D0, so avoid changing the power state
- * of the parent bridge by setting the skip_bus_pm flag for it.
- */
- if (pci_dev->bus->self)
- pci_dev->bus->self->skip_bus_pm = true;
- }
- if (pci_dev->skip_bus_pm && pm_suspend_no_platform()) {
- pci_dbg(pci_dev, "PCI PM: Skipped\n");
- goto Fixup;
- }
- pci_pm_set_unknown_state(pci_dev);
- /*
- * Some BIOSes from ASUS have a bug: If a USB EHCI host controller's
- * PCI COMMAND register isn't 0, the BIOS assumes that the controller
- * hasn't been quiesced and tries to turn it off. If the controller
- * is already in D3, this can hang or cause memory corruption.
- *
- * Since the value of the COMMAND register doesn't matter once the
- * device has been suspended, we can safely set it to 0 here.
- */
- if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI)
- pci_write_config_word(pci_dev, PCI_COMMAND, 0);
- Fixup:
- pci_fixup_device(pci_fixup_suspend_late, pci_dev);
- /*
- * If the target system sleep state is suspend-to-idle, it is sufficient
- * to check whether or not the device's wakeup settings are good for
- * runtime PM. Otherwise, the pm_resume_via_firmware() check will cause
- * pci_pm_complete() to take care of fixing up the device's state
- * anyway, if need be.
- */
- if (device_can_wakeup(dev) && !device_may_wakeup(dev))
- dev->power.may_skip_resume = false;
- return 0;
- }
- static int pci_pm_resume_noirq(struct device *dev)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
- pci_power_t prev_state = pci_dev->current_state;
- bool skip_bus_pm = pci_dev->skip_bus_pm;
- if (dev_pm_skip_resume(dev))
- return 0;
- /*
- * In the suspend-to-idle case, devices left in D0 during suspend will
- * stay in D0, so it is not necessary to restore or update their
- * configuration here and attempting to put them into D0 again is
- * pointless, so avoid doing that.
- */
- if (!(skip_bus_pm && pm_suspend_no_platform()))
- pci_pm_default_resume_early(pci_dev);
- pci_fixup_device(pci_fixup_resume_early, pci_dev);
- pcie_pme_root_status_cleanup(pci_dev);
- if (!skip_bus_pm && prev_state == PCI_D3cold)
- pci_bridge_wait_for_secondary_bus(pci_dev);
- if (pci_has_legacy_pm_support(pci_dev))
- return 0;
- if (pm && pm->resume_noirq)
- return pm->resume_noirq(dev);
- return 0;
- }
- static int pci_pm_resume_early(struct device *dev)
- {
- if (dev_pm_skip_resume(dev))
- return 0;
- return pm_generic_resume_early(dev);
- }
- static int pci_pm_resume(struct device *dev)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
- /*
- * This is necessary for the suspend error path in which resume is
- * called without restoring the standard config registers of the device.
- */
- if (pci_dev->state_saved)
- pci_restore_standard_config(pci_dev);
- if (pci_has_legacy_pm_support(pci_dev))
- return pci_legacy_resume(dev);
- pci_pm_default_resume(pci_dev);
- if (pm) {
- if (pm->resume)
- return pm->resume(dev);
- } else {
- pci_pm_reenable_device(pci_dev);
- }
- return 0;
- }
- #else /* !CONFIG_SUSPEND */
- #define pci_pm_suspend NULL
- #define pci_pm_suspend_late NULL
- #define pci_pm_suspend_noirq NULL
- #define pci_pm_resume NULL
- #define pci_pm_resume_early NULL
- #define pci_pm_resume_noirq NULL
- #endif /* !CONFIG_SUSPEND */
- #ifdef CONFIG_HIBERNATE_CALLBACKS
- static int pci_pm_freeze(struct device *dev)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
- if (pci_has_legacy_pm_support(pci_dev))
- return pci_legacy_suspend(dev, PMSG_FREEZE);
- if (!pm) {
- pci_pm_default_suspend(pci_dev);
- return 0;
- }
- /*
- * Resume all runtime-suspended devices before creating a snapshot
- * image of system memory, because the restore kernel generally cannot
- * be expected to always handle them consistently and they need to be
- * put into the runtime-active metastate during system resume anyway,
- * so it is better to ensure that the state saved in the image will be
- * always consistent with that.
- */
- pm_runtime_resume(dev);
- pci_dev->state_saved = false;
- if (pm->freeze) {
- int error;
- error = pm->freeze(dev);
- suspend_report_result(pm->freeze, error);
- if (error)
- return error;
- }
- return 0;
- }
- static int pci_pm_freeze_noirq(struct device *dev)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
- if (pci_has_legacy_pm_support(pci_dev))
- return pci_legacy_suspend_late(dev, PMSG_FREEZE);
- if (pm && pm->freeze_noirq) {
- int error;
- error = pm->freeze_noirq(dev);
- suspend_report_result(pm->freeze_noirq, error);
- if (error)
- return error;
- }
- if (!pci_dev->state_saved)
- pci_save_state(pci_dev);
- pci_pm_set_unknown_state(pci_dev);
- return 0;
- }
- static int pci_pm_thaw_noirq(struct device *dev)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
- /*
- * The pm->thaw_noirq() callback assumes the device has been
- * returned to D0 and its config state has been restored.
- *
- * In addition, pci_restore_state() restores MSI-X state in MMIO
- * space, which requires the device to be in D0, so return it to D0
- * in case the driver's "freeze" callbacks put it into a low-power
- * state.
- */
- pci_set_power_state(pci_dev, PCI_D0);
- pci_restore_state(pci_dev);
- if (pci_has_legacy_pm_support(pci_dev))
- return 0;
- if (pm && pm->thaw_noirq)
- return pm->thaw_noirq(dev);
- return 0;
- }
- static int pci_pm_thaw(struct device *dev)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
- int error = 0;
- if (pci_has_legacy_pm_support(pci_dev))
- return pci_legacy_resume(dev);
- if (pm) {
- if (pm->thaw)
- error = pm->thaw(dev);
- } else {
- pci_pm_reenable_device(pci_dev);
- }
- pci_dev->state_saved = false;
- return error;
- }
- static int pci_pm_poweroff(struct device *dev)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
- if (pci_has_legacy_pm_support(pci_dev))
- return pci_legacy_suspend(dev, PMSG_HIBERNATE);
- if (!pm) {
- pci_pm_default_suspend(pci_dev);
- return 0;
- }
- /* The reason to do that is the same as in pci_pm_suspend(). */
- if (!dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND) ||
- pci_dev_need_resume(pci_dev)) {
- pm_runtime_resume(dev);
- pci_dev->state_saved = false;
- } else {
- pci_dev_adjust_pme(pci_dev);
- }
- if (pm->poweroff) {
- int error;
- error = pm->poweroff(dev);
- suspend_report_result(pm->poweroff, error);
- if (error)
- return error;
- }
- return 0;
- }
- static int pci_pm_poweroff_late(struct device *dev)
- {
- if (dev_pm_skip_suspend(dev))
- return 0;
- pci_fixup_device(pci_fixup_suspend, to_pci_dev(dev));
- return pm_generic_poweroff_late(dev);
- }
- static int pci_pm_poweroff_noirq(struct device *dev)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
- if (dev_pm_skip_suspend(dev))
- return 0;
- if (pci_has_legacy_pm_support(pci_dev))
- return pci_legacy_suspend_late(dev, PMSG_HIBERNATE);
- if (!pm) {
- pci_fixup_device(pci_fixup_suspend_late, pci_dev);
- return 0;
- }
- if (pm->poweroff_noirq) {
- int error;
- error = pm->poweroff_noirq(dev);
- suspend_report_result(pm->poweroff_noirq, error);
- if (error)
- return error;
- }
- if (!pci_dev->state_saved && !pci_has_subordinate(pci_dev))
- pci_prepare_to_sleep(pci_dev);
- /*
- * The reason for doing this here is the same as for the analogous code
- * in pci_pm_suspend_noirq().
- */
- if (pci_dev->class == PCI_CLASS_SERIAL_USB_EHCI)
- pci_write_config_word(pci_dev, PCI_COMMAND, 0);
- pci_fixup_device(pci_fixup_suspend_late, pci_dev);
- return 0;
- }
- static int pci_pm_restore_noirq(struct device *dev)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
- pci_pm_default_resume_early(pci_dev);
- pci_fixup_device(pci_fixup_resume_early, pci_dev);
- if (pci_has_legacy_pm_support(pci_dev))
- return 0;
- if (pm && pm->restore_noirq)
- return pm->restore_noirq(dev);
- return 0;
- }
- static int pci_pm_restore(struct device *dev)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
- /*
- * This is necessary for the hibernation error path in which restore is
- * called without restoring the standard config registers of the device.
- */
- if (pci_dev->state_saved)
- pci_restore_standard_config(pci_dev);
- if (pci_has_legacy_pm_support(pci_dev))
- return pci_legacy_resume(dev);
- pci_pm_default_resume(pci_dev);
- if (pm) {
- if (pm->restore)
- return pm->restore(dev);
- } else {
- pci_pm_reenable_device(pci_dev);
- }
- return 0;
- }
- #else /* !CONFIG_HIBERNATE_CALLBACKS */
- #define pci_pm_freeze NULL
- #define pci_pm_freeze_noirq NULL
- #define pci_pm_thaw NULL
- #define pci_pm_thaw_noirq NULL
- #define pci_pm_poweroff NULL
- #define pci_pm_poweroff_late NULL
- #define pci_pm_poweroff_noirq NULL
- #define pci_pm_restore NULL
- #define pci_pm_restore_noirq NULL
- #endif /* !CONFIG_HIBERNATE_CALLBACKS */
- #ifdef CONFIG_PM
- static int pci_pm_runtime_suspend(struct device *dev)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
- pci_power_t prev = pci_dev->current_state;
- int error;
- /*
- * If pci_dev->driver is not set (unbound), we leave the device in D0,
- * but it may go to D3cold when the bridge above it runtime suspends.
- * Save its config space in case that happens.
- */
- if (!pci_dev->driver) {
- pci_save_state(pci_dev);
- return 0;
- }
- pci_dev->state_saved = false;
- if (pm && pm->runtime_suspend) {
- error = pm->runtime_suspend(dev);
- /*
- * -EBUSY and -EAGAIN is used to request the runtime PM core
- * to schedule a new suspend, so log the event only with debug
- * log level.
- */
- if (error == -EBUSY || error == -EAGAIN) {
- pci_dbg(pci_dev, "can't suspend now (%ps returned %d)\n",
- pm->runtime_suspend, error);
- return error;
- } else if (error) {
- pci_err(pci_dev, "can't suspend (%ps returned %d)\n",
- pm->runtime_suspend, error);
- return error;
- }
- }
- pci_fixup_device(pci_fixup_suspend, pci_dev);
- if (pm && pm->runtime_suspend
- && !pci_dev->state_saved && pci_dev->current_state != PCI_D0
- && pci_dev->current_state != PCI_UNKNOWN) {
- pci_WARN_ONCE(pci_dev, pci_dev->current_state != prev,
- "PCI PM: State of device not saved by %pS\n",
- pm->runtime_suspend);
- return 0;
- }
- if (!pci_dev->state_saved) {
- pci_save_state(pci_dev);
- pci_finish_runtime_suspend(pci_dev);
- }
- return 0;
- }
- static int pci_pm_runtime_resume(struct device *dev)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
- pci_power_t prev_state = pci_dev->current_state;
- int error = 0;
- /*
- * Restoring config space is necessary even if the device is not bound
- * to a driver because although we left it in D0, it may have gone to
- * D3cold when the bridge above it runtime suspended.
- */
- pci_restore_standard_config(pci_dev);
- if (!pci_dev->driver)
- return 0;
- pci_fixup_device(pci_fixup_resume_early, pci_dev);
- pci_pm_default_resume(pci_dev);
- if (prev_state == PCI_D3cold)
- pci_bridge_wait_for_secondary_bus(pci_dev);
- if (pm && pm->runtime_resume)
- error = pm->runtime_resume(dev);
- pci_dev->runtime_d3cold = false;
- return error;
- }
- static int pci_pm_runtime_idle(struct device *dev)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
- /*
- * If pci_dev->driver is not set (unbound), the device should
- * always remain in D0 regardless of the runtime PM status
- */
- if (!pci_dev->driver)
- return 0;
- if (!pm)
- return -ENOSYS;
- if (pm->runtime_idle)
- return pm->runtime_idle(dev);
- return 0;
- }
- static const struct dev_pm_ops pci_dev_pm_ops = {
- .prepare = pci_pm_prepare,
- .complete = pci_pm_complete,
- .suspend = pci_pm_suspend,
- .suspend_late = pci_pm_suspend_late,
- .resume = pci_pm_resume,
- .resume_early = pci_pm_resume_early,
- .freeze = pci_pm_freeze,
- .thaw = pci_pm_thaw,
- .poweroff = pci_pm_poweroff,
- .poweroff_late = pci_pm_poweroff_late,
- .restore = pci_pm_restore,
- .suspend_noirq = pci_pm_suspend_noirq,
- .resume_noirq = pci_pm_resume_noirq,
- .freeze_noirq = pci_pm_freeze_noirq,
- .thaw_noirq = pci_pm_thaw_noirq,
- .poweroff_noirq = pci_pm_poweroff_noirq,
- .restore_noirq = pci_pm_restore_noirq,
- .runtime_suspend = pci_pm_runtime_suspend,
- .runtime_resume = pci_pm_runtime_resume,
- .runtime_idle = pci_pm_runtime_idle,
- };
- #define PCI_PM_OPS_PTR (&pci_dev_pm_ops)
- #else /* !CONFIG_PM */
- #define pci_pm_runtime_suspend NULL
- #define pci_pm_runtime_resume NULL
- #define pci_pm_runtime_idle NULL
- #define PCI_PM_OPS_PTR NULL
- #endif /* !CONFIG_PM */
- /**
- * __pci_register_driver - register a new pci driver
- * @drv: the driver structure to register
- * @owner: owner module of drv
- * @mod_name: module name string
- *
- * Adds the driver structure to the list of registered drivers.
- * Returns a negative value on error, otherwise 0.
- * If no error occurred, the driver remains registered even if
- * no device was claimed during registration.
- */
- int __pci_register_driver(struct pci_driver *drv, struct module *owner,
- const char *mod_name)
- {
- /* initialize common driver fields */
- drv->driver.name = drv->name;
- drv->driver.bus = &pci_bus_type;
- drv->driver.owner = owner;
- drv->driver.mod_name = mod_name;
- drv->driver.groups = drv->groups;
- spin_lock_init(&drv->dynids.lock);
- INIT_LIST_HEAD(&drv->dynids.list);
- /* register with core */
- return driver_register(&drv->driver);
- }
- EXPORT_SYMBOL(__pci_register_driver);
- /**
- * pci_unregister_driver - unregister a pci driver
- * @drv: the driver structure to unregister
- *
- * Deletes the driver structure from the list of registered PCI drivers,
- * gives it a chance to clean up by calling its remove() function for
- * each device it was responsible for, and marks those devices as
- * driverless.
- */
- void pci_unregister_driver(struct pci_driver *drv)
- {
- driver_unregister(&drv->driver);
- pci_free_dynids(drv);
- }
- EXPORT_SYMBOL(pci_unregister_driver);
- static struct pci_driver pci_compat_driver = {
- .name = "compat"
- };
- /**
- * pci_dev_driver - get the pci_driver of a device
- * @dev: the device to query
- *
- * Returns the appropriate pci_driver structure or %NULL if there is no
- * registered driver for the device.
- */
- struct pci_driver *pci_dev_driver(const struct pci_dev *dev)
- {
- if (dev->driver)
- return dev->driver;
- else {
- int i;
- for (i = 0; i <= PCI_ROM_RESOURCE; i++)
- if (dev->resource[i].flags & IORESOURCE_BUSY)
- return &pci_compat_driver;
- }
- return NULL;
- }
- EXPORT_SYMBOL(pci_dev_driver);
- /**
- * pci_bus_match - Tell if a PCI device structure has a matching PCI device id structure
- * @dev: the PCI device structure to match against
- * @drv: the device driver to search for matching PCI device id structures
- *
- * Used by a driver to check whether a PCI device present in the
- * system is in its list of supported devices. Returns the matching
- * pci_device_id structure or %NULL if there is no match.
- */
- static int pci_bus_match(struct device *dev, struct device_driver *drv)
- {
- struct pci_dev *pci_dev = to_pci_dev(dev);
- struct pci_driver *pci_drv;
- const struct pci_device_id *found_id;
- if (!pci_dev->match_driver)
- return 0;
- pci_drv = to_pci_driver(drv);
- found_id = pci_match_device(pci_drv, pci_dev);
- if (found_id)
- return 1;
- return 0;
- }
- /**
- * pci_dev_get - increments the reference count of the pci device structure
- * @dev: the device being referenced
- *
- * Each live reference to a device should be refcounted.
- *
- * Drivers for PCI devices should normally record such references in
- * their probe() methods, when they bind to a device, and release
- * them by calling pci_dev_put(), in their disconnect() methods.
- *
- * A pointer to the device with the incremented reference counter is returned.
- */
- struct pci_dev *pci_dev_get(struct pci_dev *dev)
- {
- if (dev)
- get_device(&dev->dev);
- return dev;
- }
- EXPORT_SYMBOL(pci_dev_get);
- /**
- * pci_dev_put - release a use of the pci device structure
- * @dev: device that's been disconnected
- *
- * Must be called when a user of a device is finished with it. When the last
- * user of the device calls this function, the memory of the device is freed.
- */
- void pci_dev_put(struct pci_dev *dev)
- {
- if (dev)
- put_device(&dev->dev);
- }
- EXPORT_SYMBOL(pci_dev_put);
- static int pci_uevent(struct device *dev, struct kobj_uevent_env *env)
- {
- struct pci_dev *pdev;
- if (!dev)
- return -ENODEV;
- pdev = to_pci_dev(dev);
- if (add_uevent_var(env, "PCI_CLASS=%04X", pdev->class))
- return -ENOMEM;
- if (add_uevent_var(env, "PCI_ID=%04X:%04X", pdev->vendor, pdev->device))
- return -ENOMEM;
- if (add_uevent_var(env, "PCI_SUBSYS_ID=%04X:%04X", pdev->subsystem_vendor,
- pdev->subsystem_device))
- return -ENOMEM;
- if (add_uevent_var(env, "PCI_SLOT_NAME=%s", pci_name(pdev)))
- return -ENOMEM;
- if (add_uevent_var(env, "MODALIAS=pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02X",
- pdev->vendor, pdev->device,
- pdev->subsystem_vendor, pdev->subsystem_device,
- (u8)(pdev->class >> 16), (u8)(pdev->class >> 8),
- (u8)(pdev->class)))
- return -ENOMEM;
- return 0;
- }
- #if defined(CONFIG_PCIEPORTBUS) || defined(CONFIG_EEH)
- /**
- * pci_uevent_ers - emit a uevent during recovery path of PCI device
- * @pdev: PCI device undergoing error recovery
- * @err_type: type of error event
- */
- void pci_uevent_ers(struct pci_dev *pdev, enum pci_ers_result err_type)
- {
- int idx = 0;
- char *envp[3];
- switch (err_type) {
- case PCI_ERS_RESULT_NONE:
- case PCI_ERS_RESULT_CAN_RECOVER:
- envp[idx++] = "ERROR_EVENT=BEGIN_RECOVERY";
- envp[idx++] = "DEVICE_ONLINE=0";
- break;
- case PCI_ERS_RESULT_RECOVERED:
- envp[idx++] = "ERROR_EVENT=SUCCESSFUL_RECOVERY";
- envp[idx++] = "DEVICE_ONLINE=1";
- break;
- case PCI_ERS_RESULT_DISCONNECT:
- envp[idx++] = "ERROR_EVENT=FAILED_RECOVERY";
- envp[idx++] = "DEVICE_ONLINE=0";
- break;
- default:
- break;
- }
- if (idx > 0) {
- envp[idx++] = NULL;
- kobject_uevent_env(&pdev->dev.kobj, KOBJ_CHANGE, envp);
- }
- }
- #endif
- static int pci_bus_num_vf(struct device *dev)
- {
- return pci_num_vf(to_pci_dev(dev));
- }
- /**
- * pci_dma_configure - Setup DMA configuration
- * @dev: ptr to dev structure
- *
- * Function to update PCI devices's DMA configuration using the same
- * info from the OF node or ACPI node of host bridge's parent (if any).
- */
- static int pci_dma_configure(struct device *dev)
- {
- struct device *bridge;
- int ret = 0;
- bridge = pci_get_host_bridge_device(to_pci_dev(dev));
- if (IS_ENABLED(CONFIG_OF) && bridge->parent &&
- bridge->parent->of_node) {
- ret = of_dma_configure(dev, bridge->parent->of_node, true);
- } else if (has_acpi_companion(bridge)) {
- struct acpi_device *adev = to_acpi_device_node(bridge->fwnode);
- ret = acpi_dma_configure(dev, acpi_get_dma_attr(adev));
- }
- pci_put_host_bridge_device(bridge);
- return ret;
- }
- struct bus_type pci_bus_type = {
- .name = "pci",
- .match = pci_bus_match,
- .uevent = pci_uevent,
- .probe = pci_device_probe,
- .remove = pci_device_remove,
- .shutdown = pci_device_shutdown,
- .dev_groups = pci_dev_groups,
- .bus_groups = pci_bus_groups,
- .drv_groups = pci_drv_groups,
- .pm = PCI_PM_OPS_PTR,
- .num_vf = pci_bus_num_vf,
- .dma_configure = pci_dma_configure,
- };
- EXPORT_SYMBOL(pci_bus_type);
- #ifdef CONFIG_PCIEPORTBUS
- static int pcie_port_bus_match(struct device *dev, struct device_driver *drv)
- {
- struct pcie_device *pciedev;
- struct pcie_port_service_driver *driver;
- if (drv->bus != &pcie_port_bus_type || dev->bus != &pcie_port_bus_type)
- return 0;
- pciedev = to_pcie_device(dev);
- driver = to_service_driver(drv);
- if (driver->service != pciedev->service)
- return 0;
- if (driver->port_type != PCIE_ANY_PORT &&
- driver->port_type != pci_pcie_type(pciedev->port))
- return 0;
- return 1;
- }
- struct bus_type pcie_port_bus_type = {
- .name = "pci_express",
- .match = pcie_port_bus_match,
- };
- EXPORT_SYMBOL_GPL(pcie_port_bus_type);
- #endif
- static int __init pci_driver_init(void)
- {
- int ret;
- ret = bus_register(&pci_bus_type);
- if (ret)
- return ret;
- #ifdef CONFIG_PCIEPORTBUS
- ret = bus_register(&pcie_port_bus_type);
- if (ret)
- return ret;
- #endif
- dma_debug_add_bus(&pci_bus_type);
- return 0;
- }
- postcore_initcall(pci_driver_init);
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