[v1,9/9] PCI/portdrv: Rename portdrv_pci.c to portdrv.c

Message ID	152848877659.14051.10282676719082835906.stgit@bhelgaas-glaptop.roam.corp.google.com (mailing list archive)
State	New, archived
Delegated to:	Bjorn Helgaas
Headers	show Return-Path: <linux-pci-owner@kernel.org> Subject: [PATCH v1 9/9] PCI/portdrv: Rename portdrv_pci.c to portdrv.c From: Bjorn Helgaas <helgaas@kernel.org> To: linux-pci@vger.kernel.org Cc: Oza Pawandeep <poza@codeaurora.org>, linux-kernel@vger.kernel.org Date: Fri, 08 Jun 2018 15:12:56 -0500 Message-ID: <152848877659.14051.10282676719082835906.stgit@bhelgaas-glaptop.roam.corp.google.com> In-Reply-To: <152848853199.14051.12670957565366345798.stgit@bhelgaas-glaptop.roam.corp.google.com> References: <152848853199.14051.12670957565366345798.stgit@bhelgaas-glaptop.roam.corp.google.com> User-Agent: StGit/0.18 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-pci-owner@vger.kernel.org Precedence: bulk

diff --git a/drivers/pci/pcie/Makefile b/drivers/pci/pcie/Makefile index aad431790b1d..a283f9ac195d 100644 --- a/drivers/pci/pcie/Makefile +++ b/drivers/pci/pcie/Makefile @@ -2,10 +2,8 @@ # # Makefile for PCI Express features and port driver -pcieportdrv-y := portdrv_pci.o err.o - -obj-$(CONFIG_PCIEPORTBUS) += pcieportdrv.o - +obj-$(CONFIG_PCIEPORTBUS) += portdrv.o +obj-$(CONFIG_PCIEPORTBUS) += err.o obj-$(CONFIG_PCIEASPM) += aspm.o obj-$(CONFIG_PCIEAER) += aer/ obj-$(CONFIG_PCIE_PME) += pme.o diff --git a/drivers/pci/pcie/portdrv.c b/drivers/pci/pcie/portdrv.c new file mode 100644 index 000000000000..4fc86d0eef9d --- /dev/null +++ b/drivers/pci/pcie/portdrv.c @@ -0,0 +1,822 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Purpose: PCI Express Port Bus Driver + * Author: Tom Nguyen <tom.l.nguyen@intel.com> + * + * Copyright (C) 2004 Intel + * Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com) + */ + +#include <linux/pci.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/pm.h> +#include <linux/pm_runtime.h> +#include <linux/init.h> +#include <linux/aer.h> +#include <linux/dmi.h> + +#include "../pci.h" +#include "portdrv.h" + +/* If this switch is set, PCIe port native services should not be enabled. */ +bool pcie_ports_disabled; + +/* + * If the user specified "pcie_ports=native", use the PCIe services regardless + * of whether the platform has given us permission. On ACPI systems, this + * means we ignore _OSC. + */ +bool pcie_ports_native; + +static int __init pcie_port_setup(char *str) +{ + if (!strncmp(str, "compat", 6)) + pcie_ports_disabled = true; + else if (!strncmp(str, "native", 6)) + pcie_ports_native = true; + + return 1; +} +__setup("pcie_ports=", pcie_port_setup); + +/* global data */ + +struct portdrv_service_data { + struct pcie_port_service_driver *drv; + struct device *dev; + u32 service; +}; + +static int find_service_iter(struct device *device, void *data) +{ + struct pcie_port_service_driver *service_driver; + struct portdrv_service_data *pdrvs; + u32 service; + + pdrvs = (struct portdrv_service_data *) data; + service = pdrvs->service; + + if (device->bus == &pcie_port_bus_type && device->driver) { + service_driver = to_service_driver(device->driver); + if (service_driver->service == service) { + pdrvs->drv = service_driver; + pdrvs->dev = device; + return 1; + } + } + + return 0; +} + +/** + * pcie_port_find_service - find the service driver + * @dev: PCI Express port the service is associated with + * @service: Service to find + * + * Find PCI Express port service driver associated with given service + */ +struct pcie_port_service_driver *pcie_port_find_service(struct pci_dev *dev, + u32 service) +{ + struct pcie_port_service_driver *drv; + struct portdrv_service_data pdrvs; + + pdrvs.drv = NULL; + pdrvs.service = service; + device_for_each_child(&dev->dev, &pdrvs, find_service_iter); + + drv = pdrvs.drv; + return drv; +} + +/** + * pcie_port_find_device - find the struct device + * @dev: PCI Express port the service is associated with + * @service: For the service to find + * + * Find the struct device associated with given service on a pci_dev + */ +struct device *pcie_port_find_device(struct pci_dev *dev, u32 service) +{ + struct device *device; + struct portdrv_service_data pdrvs; + + pdrvs.dev = NULL; + pdrvs.service = service; + device_for_each_child(&dev->dev, &pdrvs, find_service_iter); + + device = pdrvs.dev; + return device; +} + +/** + * pcie_port_probe_service - probe driver for given PCI Express port service + * @dev: PCI Express port service device to probe against + * + * If PCI Express port service driver is registered with + * pcie_port_service_register(), this function will be called by the driver core + * whenever match is found between the driver and a port service device. + */ +static int pcie_port_probe_service(struct device *dev) +{ + struct pcie_device *pciedev; + struct pcie_port_service_driver *driver; + int status; + + if (!dev || !dev->driver) + return -ENODEV; + + driver = to_service_driver(dev->driver); + if (!driver || !driver->probe) + return -ENODEV; + + pciedev = to_pcie_device(dev); + status = driver->probe(pciedev); + if (status) + return status; + + get_device(dev); + return 0; +} + +/** + * pcie_port_remove_service - detach driver from given PCI Express port service + * @dev: PCI Express port service device to handle + * + * If PCI Express port service driver is registered with + * pcie_port_service_register(), this function will be called by the driver core + * when device_unregister() is called for the port service device associated + * with the driver. + */ +static int pcie_port_remove_service(struct device *dev) +{ + struct pcie_device *pciedev; + struct pcie_port_service_driver *driver; + + if (!dev || !dev->driver) + return 0; + + pciedev = to_pcie_device(dev); + driver = to_service_driver(dev->driver); + if (driver && driver->remove) { + driver->remove(pciedev); + put_device(dev); + } + return 0; +} + +/** + * pcie_port_shutdown_service - shut down given PCI Express port service + * @dev: PCI Express port service device to handle + * + * If PCI Express port service driver is registered with + * pcie_port_service_register(), this function will be called by the driver core + * when device_shutdown() is called for the port service device associated + * with the driver. + */ +static void pcie_port_shutdown_service(struct device *dev) {} + +/** + * pcie_port_service_register - register PCI Express port service driver + * @new: PCI Express port service driver to register + */ +int pcie_port_service_register(struct pcie_port_service_driver *new) +{ + if (pcie_ports_disabled) + return -ENODEV; + + new->driver.name = new->name; + new->driver.bus = &pcie_port_bus_type; + new->driver.probe = pcie_port_probe_service; + new->driver.remove = pcie_port_remove_service; + new->driver.shutdown = pcie_port_shutdown_service; + + return driver_register(&new->driver); +} +EXPORT_SYMBOL(pcie_port_service_register); + +/** + * pcie_port_service_unregister - unregister PCI Express port service driver + * @drv: PCI Express port service driver to unregister + */ +void pcie_port_service_unregister(struct pcie_port_service_driver *drv) +{ + driver_unregister(&drv->driver); +} +EXPORT_SYMBOL(pcie_port_service_unregister); + +static int pcie_portdrv_restore_config(struct pci_dev *dev) +{ + int retval; + + retval = pci_enable_device(dev); + if (retval) + return retval; + pci_set_master(dev); + return 0; +} + +#ifdef CONFIG_PM +static int suspend_iter(struct device *dev, void *data) +{ + struct pcie_port_service_driver *service_driver; + + if ((dev->bus == &pcie_port_bus_type) && dev->driver) { + service_driver = to_service_driver(dev->driver); + if (service_driver->suspend) + service_driver->suspend(to_pcie_device(dev)); + } + return 0; +} + +/** + * pcie_port_device_suspend - suspend port services associated with a PCIe port + * @dev: PCI Express port to handle + */ +static int pcie_port_device_suspend(struct device *dev) +{ + return device_for_each_child(dev, NULL, suspend_iter); +} + +static int resume_iter(struct device *dev, void *data) +{ + struct pcie_port_service_driver *service_driver; + + if ((dev->bus == &pcie_port_bus_type) && + (dev->driver)) { + service_driver = to_service_driver(dev->driver); + if (service_driver->resume) + service_driver->resume(to_pcie_device(dev)); + } + return 0; +} + +/** + * pcie_port_device_resume - resume port services associated with a PCIe port + * @dev: PCI Express port to handle + */ +static int pcie_port_device_resume(struct device *dev) +{ + return device_for_each_child(dev, NULL, resume_iter); +} + +static int pcie_port_runtime_suspend(struct device *dev) +{ + return to_pci_dev(dev)->bridge_d3 ? 0 : -EBUSY; +} + +static int pcie_port_runtime_resume(struct device *dev) +{ + return 0; +} + +static int pcie_port_runtime_idle(struct device *dev) +{ + /* + * Assume the PCI core has set bridge_d3 whenever it thinks the port + * should be good to go to D3. Everything else, including moving + * the port to D3, is handled by the PCI core. + */ + return to_pci_dev(dev)->bridge_d3 ? 0 : -EBUSY; +} + +static const struct dev_pm_ops pcie_portdrv_pm_ops = { + .suspend = pcie_port_device_suspend, + .resume = pcie_port_device_resume, + .freeze = pcie_port_device_suspend, + .thaw = pcie_port_device_resume, + .poweroff = pcie_port_device_suspend, + .restore = pcie_port_device_resume, + .runtime_suspend = pcie_port_runtime_suspend, + .runtime_resume = pcie_port_runtime_resume, + .runtime_idle = pcie_port_runtime_idle, +}; + +#define PCIE_PORTDRV_PM_OPS (&pcie_portdrv_pm_ops) + +#else /* !PM */ + +#define PCIE_PORTDRV_PM_OPS NULL +#endif /* !PM */ + +/** + * release_pcie_device - free PCI Express port service device structure + * @dev: Port service device to release + * + * Invoked automatically when device is being removed in response to + * device_unregister(dev). Release all resources being claimed. + */ +static void release_pcie_device(struct device *dev) +{ + kfree(to_pcie_device(dev)); +} + +/* + * Fill in *pme, *aer, *dpc with the relevant Interrupt Message Numbers if + * services are enabled in "mask". Return the number of MSI/MSI-X vectors + * required to accommodate the largest Message Number. + */ +static int pcie_message_numbers(struct pci_dev *dev, int mask, + u32 *pme, u32 *aer, u32 *dpc) +{ + u32 nvec = 0, pos; + u16 reg16; + + /* + * The Interrupt Message Number indicates which vector is used, i.e., + * the MSI-X table entry or the MSI offset between the base Message + * Data and the generated interrupt message. See PCIe r3.1, sec + * 7.8.2, 7.10.10, 7.31.2. + */ + + if (mask & (PCIE_PORT_SERVICE_PME | PCIE_PORT_SERVICE_HP)) { + pcie_capability_read_word(dev, PCI_EXP_FLAGS, &reg16); + *pme = (reg16 & PCI_EXP_FLAGS_IRQ) >> 9; + nvec = *pme + 1; + } + +#ifdef CONFIG_PCIEAER + if (mask & PCIE_PORT_SERVICE_AER) { + u32 reg32; + + pos = dev->aer_cap; + if (pos) { + pci_read_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, + &reg32); + *aer = (reg32 & PCI_ERR_ROOT_AER_IRQ) >> 27; + nvec = max(nvec, *aer + 1); + } + } +#endif + + if (mask & PCIE_PORT_SERVICE_DPC) { + pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_DPC); + if (pos) { + pci_read_config_word(dev, pos + PCI_EXP_DPC_CAP, + &reg16); + *dpc = reg16 & PCI_EXP_DPC_IRQ; + nvec = max(nvec, *dpc + 1); + } + } + + return nvec; +} + +/* + * The PCIe Capability Interrupt Message Number (PCIe r3.1, sec 7.8.2) must + * be one of the first 32 MSI-X entries. Per PCI r3.0, sec 6.8.3.1, MSI + * supports a maximum of 32 vectors per function. + */ +#define PCIE_PORT_MAX_MSI_ENTRIES 32 + +/** + * pcie_port_enable_irq_vec - try to set up MSI-X or MSI as interrupt mode + * for given port + * @dev: PCI Express port to handle + * @irqs: Array of interrupt vectors to populate + * @mask: Bitmask of port capabilities returned by get_port_device_capability() + * + * Return value: 0 on success, error code on failure + */ +static int pcie_port_enable_irq_vec(struct pci_dev *dev, int *irqs, int mask) +{ + int nr_entries, nvec; + u32 pme = 0, aer = 0, dpc = 0; + + /* Allocate the maximum possible number of MSI/MSI-X vectors */ + nr_entries = pci_alloc_irq_vectors(dev, 1, PCIE_PORT_MAX_MSI_ENTRIES, + PCI_IRQ_MSIX | PCI_IRQ_MSI); + if (nr_entries < 0) + return nr_entries; + + /* See how many and which Interrupt Message Numbers we actually use */ + nvec = pcie_message_numbers(dev, mask, &pme, &aer, &dpc); + if (nvec > nr_entries) { + pci_free_irq_vectors(dev); + return -EIO; + } + + /* + * If we allocated more than we need, free them and reallocate fewer. + * + * Reallocating may change the specific vectors we get, so + * pci_irq_vector() must be done *after* the reallocation. + * + * If we're using MSI, hardware is *allowed* to change the Interrupt + * Message Numbers when we free and reallocate the vectors, but we + * assume it won't because we allocate enough vectors for the + * biggest Message Number we found. + */ + if (nvec != nr_entries) { + pci_free_irq_vectors(dev); + + nr_entries = pci_alloc_irq_vectors(dev, nvec, nvec, + PCI_IRQ_MSIX | PCI_IRQ_MSI); + if (nr_entries < 0) + return nr_entries; + } + + /* PME and hotplug share an MSI/MSI-X vector */ + if (mask & (PCIE_PORT_SERVICE_PME | PCIE_PORT_SERVICE_HP)) { + irqs[PCIE_PORT_SERVICE_PME_SHIFT] = pci_irq_vector(dev, pme); + irqs[PCIE_PORT_SERVICE_HP_SHIFT] = pci_irq_vector(dev, pme); + } + + if (mask & PCIE_PORT_SERVICE_AER) + irqs[PCIE_PORT_SERVICE_AER_SHIFT] = pci_irq_vector(dev, aer); + + if (mask & PCIE_PORT_SERVICE_DPC) + irqs[PCIE_PORT_SERVICE_DPC_SHIFT] = pci_irq_vector(dev, dpc); + + return 0; +} + +/** + * pcie_init_service_irqs - initialize irqs for PCI Express port services + * @dev: PCI Express port to handle + * @irqs: Array of irqs to populate + * @mask: Bitmask of port capabilities returned by get_port_device_capability() + * + * Return value: Interrupt mode associated with the port + */ +static int pcie_init_service_irqs(struct pci_dev *dev, int *irqs, int mask) +{ + int ret, i; + + for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) + irqs[i] = -1; + + /* + * If we support PME but can't use MSI/MSI-X for it, we have to + * fall back to INTx or other interrupts, e.g., a system shared + * interrupt. + */ + if ((mask & PCIE_PORT_SERVICE_PME) && pcie_pme_no_msi()) + goto legacy_irq; + + /* Try to use MSI-X or MSI if supported */ + if (pcie_port_enable_irq_vec(dev, irqs, mask) == 0) + return 0; + +legacy_irq: + /* fall back to legacy IRQ */ + ret = pci_alloc_irq_vectors(dev, 1, 1, PCI_IRQ_LEGACY); + if (ret < 0) + return -ENODEV; + + for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) + irqs[i] = pci_irq_vector(dev, 0); + + return 0; +} + +/** + * get_port_device_capability - discover capabilities of a PCI Express port + * @dev: PCI Express port to examine + * + * The capabilities are read from the port's PCI Express configuration registers + * as described in PCI Express Base Specification 1.0a sections 7.8.2, 7.8.9 and + * 7.9 - 7.11. + * + * Return value: Bitmask of discovered port capabilities + */ +static int get_port_device_capability(struct pci_dev *dev) +{ + struct pci_host_bridge *host = pci_find_host_bridge(dev->bus); + int services = 0; + + if (dev->is_hotplug_bridge && + (pcie_ports_native || host->native_pcie_hotplug)) { + services |= PCIE_PORT_SERVICE_HP; + + /* + * Disable hot-plug interrupts in case they have been enabled + * by the BIOS and the hot-plug service driver is not loaded. + */ + pcie_capability_clear_word(dev, PCI_EXP_SLTCTL, + PCI_EXP_SLTCTL_CCIE | PCI_EXP_SLTCTL_HPIE); + } + +#ifdef CONFIG_PCIEAER + if (dev->aer_cap && pci_aer_available() && + (pcie_ports_native || host->native_aer)) { + services |= PCIE_PORT_SERVICE_AER; + + /* + * Disable AER on this port in case it's been enabled by the + * BIOS (the AER service driver will enable it when necessary). + */ + pci_disable_pcie_error_reporting(dev); + } +#endif + + /* + * Root ports are capable of generating PME too. Root Complex + * Event Collectors can also generate PMEs, but we don't handle + * those yet. + */ + if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT && + (pcie_ports_native || host->native_pme)) { + services |= PCIE_PORT_SERVICE_PME; + + /* + * Disable PME interrupt on this port in case it's been enabled + * by the BIOS (the PME service driver will enable it when + * necessary). + */ + pcie_pme_interrupt_enable(dev, false); + } + + if (pci_find_ext_capability(dev, PCI_EXT_CAP_ID_DPC) && + pci_aer_available() && services & PCIE_PORT_SERVICE_AER) + services |= PCIE_PORT_SERVICE_DPC; + + return services; +} + +#define get_descriptor_id(type, service) (((type - 4) << 8) | service) + +/** + * pcie_device_init - allocate and initialize PCI Express port service device + * @pdev: PCI Express port to associate the service device with + * @service: Type of service to associate with the service device + * @irq: Interrupt vector to associate with the service device + */ +static int pcie_device_init(struct pci_dev *pdev, int service, int irq) +{ + int retval; + struct pcie_device *pcie; + struct device *device; + + pcie = kzalloc(sizeof(*pcie), GFP_KERNEL); + if (!pcie) + return -ENOMEM; + pcie->port = pdev; + pcie->irq = irq; + pcie->service = service; + + /* Initialize generic device interface */ + device = &pcie->device; + device->bus = &pcie_port_bus_type; + device->release = release_pcie_device; /* callback to free pcie dev */ + dev_set_name(device, "%s:pcie%03x", + pci_name(pdev), + get_descriptor_id(pci_pcie_type(pdev), service)); + device->parent = &pdev->dev; + device_enable_async_suspend(device); + + retval = device_register(device); + if (retval) { + put_device(device); + return retval; + } + + pm_runtime_no_callbacks(device); + + return 0; +} + +/** + * pcie_port_device_register - register PCI Express port + * @dev: PCI Express port to register + * + * Allocate the port extension structure and register services associated with + * the port. + */ +int pcie_port_device_register(struct pci_dev *dev) +{ + int status, capabilities, i, nr_service; + int irqs[PCIE_PORT_DEVICE_MAXSERVICES]; + + /* Enable PCI Express port device */ + status = pci_enable_device(dev); + if (status) + return status; + + /* Get and check PCI Express port services */ + capabilities = get_port_device_capability(dev); + if (!capabilities) + return 0; + + pci_set_master(dev); + /* + * Initialize service irqs. Don't use service devices that + * require interrupts if there is no way to generate them. + * However, some drivers may have a polling mode (e.g. pciehp_poll_mode) + * that can be used in the absence of irqs. Allow them to determine + * if that is to be used. + */ + status = pcie_init_service_irqs(dev, irqs, capabilities); + if (status) { + capabilities &= PCIE_PORT_SERVICE_HP; + if (!capabilities) + goto error_disable; + } + + /* Allocate child services if any */ + status = -ENODEV; + nr_service = 0; + for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) { + int service = 1 << i; + if (!(capabilities & service)) + continue; + if (!pcie_device_init(dev, service, irqs[i])) + nr_service++; + } + if (!nr_service) + goto error_cleanup_irqs; + + return 0; + +error_cleanup_irqs: + pci_free_irq_vectors(dev); +error_disable: + pci_disable_device(dev); + return status; +} + +/* + * pcie_portdrv_probe - Probe PCI-Express port devices + * @dev: PCI-Express port device being probed + * + * If detected invokes the pcie_port_device_register() method for + * this port device. + */ +static int pcie_portdrv_probe(struct pci_dev *dev, + const struct pci_device_id *id) +{ + int status; + + if (!pci_is_pcie(dev) || + ((pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT) && + (pci_pcie_type(dev) != PCI_EXP_TYPE_UPSTREAM) && + (pci_pcie_type(dev) != PCI_EXP_TYPE_DOWNSTREAM))) + return -ENODEV; + + status = pcie_port_device_register(dev); + if (status) + return status; + + pci_save_state(dev); + + dev_pm_set_driver_flags(&dev->dev, DPM_FLAG_SMART_SUSPEND | + DPM_FLAG_LEAVE_SUSPENDED); + + if (pci_bridge_d3_possible(dev)) { + /* + * Keep the port resumed 100ms to make sure things like + * config space accesses from userspace (lspci) will not + * cause the port to repeatedly suspend and resume. + */ + pm_runtime_set_autosuspend_delay(&dev->dev, 100); + pm_runtime_use_autosuspend(&dev->dev); + pm_runtime_mark_last_busy(&dev->dev); + pm_runtime_put_autosuspend(&dev->dev); + pm_runtime_allow(&dev->dev); + } + + return 0; +} + +static int remove_iter(struct device *dev, void *data) +{ + if (dev->bus == &pcie_port_bus_type) + device_unregister(dev); + return 0; +} + +/** + * pcie_port_device_remove - unregister PCI Express port service devices + * @dev: PCI Express port the service devices to unregister are associated with + * + * Remove PCI Express port service devices associated with given port and + * disable MSI-X or MSI for the port. + */ +static void pcie_port_device_remove(struct pci_dev *dev) +{ + device_for_each_child(&dev->dev, NULL, remove_iter); + pci_free_irq_vectors(dev); + pci_disable_device(dev); +} + +static void pcie_portdrv_remove(struct pci_dev *dev) +{ + if (pci_bridge_d3_possible(dev)) { + pm_runtime_forbid(&dev->dev); + pm_runtime_get_noresume(&dev->dev); + pm_runtime_dont_use_autosuspend(&dev->dev); + } + + pcie_port_device_remove(dev); +} + +static pci_ers_result_t pcie_portdrv_error_detected(struct pci_dev *dev, + enum pci_channel_state error) +{ + /* Root Port has no impact. Always recovers. */ + return PCI_ERS_RESULT_CAN_RECOVER; +} + +static pci_ers_result_t pcie_portdrv_mmio_enabled(struct pci_dev *dev) +{ + return PCI_ERS_RESULT_RECOVERED; +} + +static pci_ers_result_t pcie_portdrv_slot_reset(struct pci_dev *dev) +{ + /* If fatal, restore cfg space for possible link reset at upstream */ + if (dev->error_state == pci_channel_io_frozen) { + dev->state_saved = true; + pci_restore_state(dev); + pcie_portdrv_restore_config(dev); + pci_enable_pcie_error_reporting(dev); + } + + return PCI_ERS_RESULT_RECOVERED; +} + +static int err_resume_iter(struct device *device, void *data) +{ + struct pcie_device *pcie_device; + struct pcie_port_service_driver *driver; + + if (device->bus == &pcie_port_bus_type && device->driver) { + driver = to_service_driver(device->driver); + if (driver && driver->error_resume) { + pcie_device = to_pcie_device(device); + + /* Forward error message to service drivers */ + driver->error_resume(pcie_device->port); + } + } + + return 0; +} + +static void pcie_portdrv_err_resume(struct pci_dev *dev) +{ + device_for_each_child(&dev->dev, NULL, err_resume_iter); +} + +static const struct pci_device_id port_pci_ids[] = { { + /* handle any PCI-Express port */ + PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) | 0x00), ~0), + }, + { } +}; + +static const struct pci_error_handlers pcie_portdrv_err_handler = { + .error_detected = pcie_portdrv_error_detected, + .mmio_enabled = pcie_portdrv_mmio_enabled, + .slot_reset = pcie_portdrv_slot_reset, + .resume = pcie_portdrv_err_resume, +}; + +static struct pci_driver pcie_portdriver = { + .name = "pcieport", + .id_table = port_pci_ids, + + .probe = pcie_portdrv_probe, + .remove = pcie_portdrv_remove, + .shutdown = pcie_portdrv_remove, + + .err_handler = &pcie_portdrv_err_handler, + + .driver.pm = PCIE_PORTDRV_PM_OPS, +}; + +static int __init dmi_pcie_pme_disable_msi(const struct dmi_system_id *d) +{ + pr_notice("%s detected: will not use MSI for PCIe PME signaling\n", + d->ident); + pcie_pme_disable_msi(); + return 0; +} + +static const struct dmi_system_id pcie_portdrv_dmi_table[] __initconst = { + /* + * Boxes that should not use MSI for PCIe PME signaling. + */ + { + .callback = dmi_pcie_pme_disable_msi, + .ident = "MSI Wind U-100", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, + "MICRO-STAR INTERNATIONAL CO., LTD"), + DMI_MATCH(DMI_PRODUCT_NAME, "U-100"), + }, + }, + { } +}; + +static int __init pcie_portdrv_init(void) +{ + if (pcie_ports_disabled) + return -EACCES; + + dmi_check_system(pcie_portdrv_dmi_table); + + return pci_register_driver(&pcie_portdriver); +} +device_initcall(pcie_portdrv_init); diff --git a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c deleted file mode 100644 index 4fc86d0eef9d..000000000000 --- a/drivers/pci/pcie/portdrv_pci.c +++ /dev/null @@ -1,822 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Purpose: PCI Express Port Bus Driver - * Author: Tom Nguyen <tom.l.nguyen@intel.com> - * - * Copyright (C) 2004 Intel - * Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com) - */ - -#include <linux/pci.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/pm.h> -#include <linux/pm_runtime.h> -#include <linux/init.h> -#include <linux/aer.h> -#include <linux/dmi.h> - -#include "../pci.h" -#include "portdrv.h" - -/* If this switch is set, PCIe port native services should not be enabled. */ -bool pcie_ports_disabled; - -/* - * If the user specified "pcie_ports=native", use the PCIe services regardless - * of whether the platform has given us permission. On ACPI systems, this - * means we ignore _OSC. - */ -bool pcie_ports_native; - -static int __init pcie_port_setup(char *str) -{ - if (!strncmp(str, "compat", 6)) - pcie_ports_disabled = true; - else if (!strncmp(str, "native", 6)) - pcie_ports_native = true; - - return 1; -} -__setup("pcie_ports=", pcie_port_setup); - -/* global data */ - -struct portdrv_service_data { - struct pcie_port_service_driver *drv; - struct device *dev; - u32 service; -}; - -static int find_service_iter(struct device *device, void *data) -{ - struct pcie_port_service_driver *service_driver; - struct portdrv_service_data *pdrvs; - u32 service; - - pdrvs = (struct portdrv_service_data *) data; - service = pdrvs->service; - - if (device->bus == &pcie_port_bus_type && device->driver) { - service_driver = to_service_driver(device->driver); - if (service_driver->service == service) { - pdrvs->drv = service_driver; - pdrvs->dev = device; - return 1; - } - } - - return 0; -} - -/** - * pcie_port_find_service - find the service driver - * @dev: PCI Express port the service is associated with - * @service: Service to find - * - * Find PCI Express port service driver associated with given service - */ -struct pcie_port_service_driver *pcie_port_find_service(struct pci_dev *dev, - u32 service) -{ - struct pcie_port_service_driver *drv; - struct portdrv_service_data pdrvs; - - pdrvs.drv = NULL; - pdrvs.service = service; - device_for_each_child(&dev->dev, &pdrvs, find_service_iter); - - drv = pdrvs.drv; - return drv; -} - -/** - * pcie_port_find_device - find the struct device - * @dev: PCI Express port the service is associated with - * @service: For the service to find - * - * Find the struct device associated with given service on a pci_dev - */ -struct device *pcie_port_find_device(struct pci_dev *dev, u32 service) -{ - struct device *device; - struct portdrv_service_data pdrvs; - - pdrvs.dev = NULL; - pdrvs.service = service; - device_for_each_child(&dev->dev, &pdrvs, find_service_iter); - - device = pdrvs.dev; - return device; -} - -/** - * pcie_port_probe_service - probe driver for given PCI Express port service - * @dev: PCI Express port service device to probe against - * - * If PCI Express port service driver is registered with - * pcie_port_service_register(), this function will be called by the driver core - * whenever match is found between the driver and a port service device. - */ -static int pcie_port_probe_service(struct device *dev) -{ - struct pcie_device *pciedev; - struct pcie_port_service_driver *driver; - int status; - - if (!dev || !dev->driver) - return -ENODEV; - - driver = to_service_driver(dev->driver); - if (!driver || !driver->probe) - return -ENODEV; - - pciedev = to_pcie_device(dev); - status = driver->probe(pciedev); - if (status) - return status; - - get_device(dev); - return 0; -} - -/** - * pcie_port_remove_service - detach driver from given PCI Express port service - * @dev: PCI Express port service device to handle - * - * If PCI Express port service driver is registered with - * pcie_port_service_register(), this function will be called by the driver core - * when device_unregister() is called for the port service device associated - * with the driver. - */ -static int pcie_port_remove_service(struct device *dev) -{ - struct pcie_device *pciedev; - struct pcie_port_service_driver *driver; - - if (!dev || !dev->driver) - return 0; - - pciedev = to_pcie_device(dev); - driver = to_service_driver(dev->driver); - if (driver && driver->remove) { - driver->remove(pciedev); - put_device(dev); - } - return 0; -} - -/** - * pcie_port_shutdown_service - shut down given PCI Express port service - * @dev: PCI Express port service device to handle - * - * If PCI Express port service driver is registered with - * pcie_port_service_register(), this function will be called by the driver core - * when device_shutdown() is called for the port service device associated - * with the driver. - */ -static void pcie_port_shutdown_service(struct device *dev) {} - -/** - * pcie_port_service_register - register PCI Express port service driver - * @new: PCI Express port service driver to register - */ -int pcie_port_service_register(struct pcie_port_service_driver *new) -{ - if (pcie_ports_disabled) - return -ENODEV; - - new->driver.name = new->name; - new->driver.bus = &pcie_port_bus_type; - new->driver.probe = pcie_port_probe_service; - new->driver.remove = pcie_port_remove_service; - new->driver.shutdown = pcie_port_shutdown_service; - - return driver_register(&new->driver); -} -EXPORT_SYMBOL(pcie_port_service_register); - -/** - * pcie_port_service_unregister - unregister PCI Express port service driver - * @drv: PCI Express port service driver to unregister - */ -void pcie_port_service_unregister(struct pcie_port_service_driver *drv) -{ - driver_unregister(&drv->driver); -} -EXPORT_SYMBOL(pcie_port_service_unregister); - -static int pcie_portdrv_restore_config(struct pci_dev *dev) -{ - int retval; - - retval = pci_enable_device(dev); - if (retval) - return retval; - pci_set_master(dev); - return 0; -} - -#ifdef CONFIG_PM -static int suspend_iter(struct device *dev, void *data) -{ - struct pcie_port_service_driver *service_driver; - - if ((dev->bus == &pcie_port_bus_type) && dev->driver) { - service_driver = to_service_driver(dev->driver); - if (service_driver->suspend) - service_driver->suspend(to_pcie_device(dev)); - } - return 0; -} - -/** - * pcie_port_device_suspend - suspend port services associated with a PCIe port - * @dev: PCI Express port to handle - */ -static int pcie_port_device_suspend(struct device *dev) -{ - return device_for_each_child(dev, NULL, suspend_iter); -} - -static int resume_iter(struct device *dev, void *data) -{ - struct pcie_port_service_driver *service_driver; - - if ((dev->bus == &pcie_port_bus_type) && - (dev->driver)) { - service_driver = to_service_driver(dev->driver); - if (service_driver->resume) - service_driver->resume(to_pcie_device(dev)); - } - return 0; -} - -/** - * pcie_port_device_resume - resume port services associated with a PCIe port - * @dev: PCI Express port to handle - */ -static int pcie_port_device_resume(struct device *dev) -{ - return device_for_each_child(dev, NULL, resume_iter); -} - -static int pcie_port_runtime_suspend(struct device *dev) -{ - return to_pci_dev(dev)->bridge_d3 ? 0 : -EBUSY; -} - -static int pcie_port_runtime_resume(struct device *dev) -{ - return 0; -} - -static int pcie_port_runtime_idle(struct device *dev) -{ - /* - * Assume the PCI core has set bridge_d3 whenever it thinks the port - * should be good to go to D3. Everything else, including moving - * the port to D3, is handled by the PCI core. - */ - return to_pci_dev(dev)->bridge_d3 ? 0 : -EBUSY; -} - -static const struct dev_pm_ops pcie_portdrv_pm_ops = { - .suspend = pcie_port_device_suspend, - .resume = pcie_port_device_resume, - .freeze = pcie_port_device_suspend, - .thaw = pcie_port_device_resume, - .poweroff = pcie_port_device_suspend, - .restore = pcie_port_device_resume, - .runtime_suspend = pcie_port_runtime_suspend, - .runtime_resume = pcie_port_runtime_resume, - .runtime_idle = pcie_port_runtime_idle, -}; - -#define PCIE_PORTDRV_PM_OPS (&pcie_portdrv_pm_ops) - -#else /* !PM */ - -#define PCIE_PORTDRV_PM_OPS NULL -#endif /* !PM */ - -/** - * release_pcie_device - free PCI Express port service device structure - * @dev: Port service device to release - * - * Invoked automatically when device is being removed in response to - * device_unregister(dev). Release all resources being claimed. - */ -static void release_pcie_device(struct device *dev) -{ - kfree(to_pcie_device(dev)); -} - -/* - * Fill in *pme, *aer, *dpc with the relevant Interrupt Message Numbers if - * services are enabled in "mask". Return the number of MSI/MSI-X vectors - * required to accommodate the largest Message Number. - */ -static int pcie_message_numbers(struct pci_dev *dev, int mask, - u32 *pme, u32 *aer, u32 *dpc) -{ - u32 nvec = 0, pos; - u16 reg16; - - /* - * The Interrupt Message Number indicates which vector is used, i.e., - * the MSI-X table entry or the MSI offset between the base Message - * Data and the generated interrupt message. See PCIe r3.1, sec - * 7.8.2, 7.10.10, 7.31.2. - */ - - if (mask & (PCIE_PORT_SERVICE_PME | PCIE_PORT_SERVICE_HP)) { - pcie_capability_read_word(dev, PCI_EXP_FLAGS, &reg16); - *pme = (reg16 & PCI_EXP_FLAGS_IRQ) >> 9; - nvec = *pme + 1; - } - -#ifdef CONFIG_PCIEAER - if (mask & PCIE_PORT_SERVICE_AER) { - u32 reg32; - - pos = dev->aer_cap; - if (pos) { - pci_read_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, - &reg32); - *aer = (reg32 & PCI_ERR_ROOT_AER_IRQ) >> 27; - nvec = max(nvec, *aer + 1); - } - } -#endif - - if (mask & PCIE_PORT_SERVICE_DPC) { - pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_DPC); - if (pos) { - pci_read_config_word(dev, pos + PCI_EXP_DPC_CAP, - &reg16); - *dpc = reg16 & PCI_EXP_DPC_IRQ; - nvec = max(nvec, *dpc + 1); - } - } - - return nvec; -} - -/* - * The PCIe Capability Interrupt Message Number (PCIe r3.1, sec 7.8.2) must - * be one of the first 32 MSI-X entries. Per PCI r3.0, sec 6.8.3.1, MSI - * supports a maximum of 32 vectors per function. - */ -#define PCIE_PORT_MAX_MSI_ENTRIES 32 - -/** - * pcie_port_enable_irq_vec - try to set up MSI-X or MSI as interrupt mode - * for given port - * @dev: PCI Express port to handle - * @irqs: Array of interrupt vectors to populate - * @mask: Bitmask of port capabilities returned by get_port_device_capability() - * - * Return value: 0 on success, error code on failure - */ -static int pcie_port_enable_irq_vec(struct pci_dev *dev, int *irqs, int mask) -{ - int nr_entries, nvec; - u32 pme = 0, aer = 0, dpc = 0; - - /* Allocate the maximum possible number of MSI/MSI-X vectors */ - nr_entries = pci_alloc_irq_vectors(dev, 1, PCIE_PORT_MAX_MSI_ENTRIES, - PCI_IRQ_MSIX | PCI_IRQ_MSI); - if (nr_entries < 0) - return nr_entries; - - /* See how many and which Interrupt Message Numbers we actually use */ - nvec = pcie_message_numbers(dev, mask, &pme, &aer, &dpc); - if (nvec > nr_entries) { - pci_free_irq_vectors(dev); - return -EIO; - } - - /* - * If we allocated more than we need, free them and reallocate fewer. - * - * Reallocating may change the specific vectors we get, so - * pci_irq_vector() must be done *after* the reallocation. - * - * If we're using MSI, hardware is *allowed* to change the Interrupt - * Message Numbers when we free and reallocate the vectors, but we - * assume it won't because we allocate enough vectors for the - * biggest Message Number we found. - */ - if (nvec != nr_entries) { - pci_free_irq_vectors(dev); - - nr_entries = pci_alloc_irq_vectors(dev, nvec, nvec, - PCI_IRQ_MSIX | PCI_IRQ_MSI); - if (nr_entries < 0) - return nr_entries; - } - - /* PME and hotplug share an MSI/MSI-X vector */ - if (mask & (PCIE_PORT_SERVICE_PME | PCIE_PORT_SERVICE_HP)) { - irqs[PCIE_PORT_SERVICE_PME_SHIFT] = pci_irq_vector(dev, pme); - irqs[PCIE_PORT_SERVICE_HP_SHIFT] = pci_irq_vector(dev, pme); - } - - if (mask & PCIE_PORT_SERVICE_AER) - irqs[PCIE_PORT_SERVICE_AER_SHIFT] = pci_irq_vector(dev, aer); - - if (mask & PCIE_PORT_SERVICE_DPC) - irqs[PCIE_PORT_SERVICE_DPC_SHIFT] = pci_irq_vector(dev, dpc); - - return 0; -} - -/** - * pcie_init_service_irqs - initialize irqs for PCI Express port services - * @dev: PCI Express port to handle - * @irqs: Array of irqs to populate - * @mask: Bitmask of port capabilities returned by get_port_device_capability() - * - * Return value: Interrupt mode associated with the port - */ -static int pcie_init_service_irqs(struct pci_dev *dev, int *irqs, int mask) -{ - int ret, i; - - for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) - irqs[i] = -1; - - /* - * If we support PME but can't use MSI/MSI-X for it, we have to - * fall back to INTx or other interrupts, e.g., a system shared - * interrupt. - */ - if ((mask & PCIE_PORT_SERVICE_PME) && pcie_pme_no_msi()) - goto legacy_irq; - - /* Try to use MSI-X or MSI if supported */ - if (pcie_port_enable_irq_vec(dev, irqs, mask) == 0) - return 0; - -legacy_irq: - /* fall back to legacy IRQ */ - ret = pci_alloc_irq_vectors(dev, 1, 1, PCI_IRQ_LEGACY); - if (ret < 0) - return -ENODEV; - - for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) - irqs[i] = pci_irq_vector(dev, 0); - - return 0; -} - -/** - * get_port_device_capability - discover capabilities of a PCI Express port - * @dev: PCI Express port to examine - * - * The capabilities are read from the port's PCI Express configuration registers - * as described in PCI Express Base Specification 1.0a sections 7.8.2, 7.8.9 and - * 7.9 - 7.11. - * - * Return value: Bitmask of discovered port capabilities - */ -static int get_port_device_capability(struct pci_dev *dev) -{ - struct pci_host_bridge *host = pci_find_host_bridge(dev->bus); - int services = 0; - - if (dev->is_hotplug_bridge && - (pcie_ports_native || host->native_pcie_hotplug)) { - services |= PCIE_PORT_SERVICE_HP; - - /* - * Disable hot-plug interrupts in case they have been enabled - * by the BIOS and the hot-plug service driver is not loaded. - */ - pcie_capability_clear_word(dev, PCI_EXP_SLTCTL, - PCI_EXP_SLTCTL_CCIE | PCI_EXP_SLTCTL_HPIE); - } - -#ifdef CONFIG_PCIEAER - if (dev->aer_cap && pci_aer_available() && - (pcie_ports_native || host->native_aer)) { - services |= PCIE_PORT_SERVICE_AER; - - /* - * Disable AER on this port in case it's been enabled by the - * BIOS (the AER service driver will enable it when necessary). - */ - pci_disable_pcie_error_reporting(dev); - } -#endif - - /* - * Root ports are capable of generating PME too. Root Complex - * Event Collectors can also generate PMEs, but we don't handle - * those yet. - */ - if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT && - (pcie_ports_native || host->native_pme)) { - services |= PCIE_PORT_SERVICE_PME; - - /* - * Disable PME interrupt on this port in case it's been enabled - * by the BIOS (the PME service driver will enable it when - * necessary). - */ - pcie_pme_interrupt_enable(dev, false); - } - - if (pci_find_ext_capability(dev, PCI_EXT_CAP_ID_DPC) && - pci_aer_available() && services & PCIE_PORT_SERVICE_AER) - services |= PCIE_PORT_SERVICE_DPC; - - return services; -} - -#define get_descriptor_id(type, service) (((type - 4) << 8) | service) - -/** - * pcie_device_init - allocate and initialize PCI Express port service device - * @pdev: PCI Express port to associate the service device with - * @service: Type of service to associate with the service device - * @irq: Interrupt vector to associate with the service device - */ -static int pcie_device_init(struct pci_dev *pdev, int service, int irq) -{ - int retval; - struct pcie_device *pcie; - struct device *device; - - pcie = kzalloc(sizeof(*pcie), GFP_KERNEL); - if (!pcie) - return -ENOMEM; - pcie->port = pdev; - pcie->irq = irq; - pcie->service = service; - - /* Initialize generic device interface */ - device = &pcie->device; - device->bus = &pcie_port_bus_type; - device->release = release_pcie_device; /* callback to free pcie dev */ - dev_set_name(device, "%s:pcie%03x", - pci_name(pdev), - get_descriptor_id(pci_pcie_type(pdev), service)); - device->parent = &pdev->dev; - device_enable_async_suspend(device); - - retval = device_register(device); - if (retval) { - put_device(device); - return retval; - } - - pm_runtime_no_callbacks(device); - - return 0; -} - -/** - * pcie_port_device_register - register PCI Express port - * @dev: PCI Express port to register - * - * Allocate the port extension structure and register services associated with - * the port. - */ -int pcie_port_device_register(struct pci_dev *dev) -{ - int status, capabilities, i, nr_service; - int irqs[PCIE_PORT_DEVICE_MAXSERVICES]; - - /* Enable PCI Express port device */ - status = pci_enable_device(dev); - if (status) - return status; - - /* Get and check PCI Express port services */ - capabilities = get_port_device_capability(dev); - if (!capabilities) - return 0; - - pci_set_master(dev); - /* - * Initialize service irqs. Don't use service devices that - * require interrupts if there is no way to generate them. - * However, some drivers may have a polling mode (e.g. pciehp_poll_mode) - * that can be used in the absence of irqs. Allow them to determine - * if that is to be used. - */ - status = pcie_init_service_irqs(dev, irqs, capabilities); - if (status) { - capabilities &= PCIE_PORT_SERVICE_HP; - if (!capabilities) - goto error_disable; - } - - /* Allocate child services if any */ - status = -ENODEV; - nr_service = 0; - for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) { - int service = 1 << i; - if (!(capabilities & service)) - continue; - if (!pcie_device_init(dev, service, irqs[i])) - nr_service++; - } - if (!nr_service) - goto error_cleanup_irqs; - - return 0; - -error_cleanup_irqs: - pci_free_irq_vectors(dev); -error_disable: - pci_disable_device(dev); - return status; -} - -/* - * pcie_portdrv_probe - Probe PCI-Express port devices - * @dev: PCI-Express port device being probed - * - * If detected invokes the pcie_port_device_register() method for - * this port device. - */ -static int pcie_portdrv_probe(struct pci_dev *dev, - const struct pci_device_id *id) -{ - int status; - - if (!pci_is_pcie(dev) || - ((pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT) && - (pci_pcie_type(dev) != PCI_EXP_TYPE_UPSTREAM) && - (pci_pcie_type(dev) != PCI_EXP_TYPE_DOWNSTREAM))) - return -ENODEV; - - status = pcie_port_device_register(dev); - if (status) - return status; - - pci_save_state(dev); - - dev_pm_set_driver_flags(&dev->dev, DPM_FLAG_SMART_SUSPEND | - DPM_FLAG_LEAVE_SUSPENDED); - - if (pci_bridge_d3_possible(dev)) { - /* - * Keep the port resumed 100ms to make sure things like - * config space accesses from userspace (lspci) will not - * cause the port to repeatedly suspend and resume. - */ - pm_runtime_set_autosuspend_delay(&dev->dev, 100); - pm_runtime_use_autosuspend(&dev->dev); - pm_runtime_mark_last_busy(&dev->dev); - pm_runtime_put_autosuspend(&dev->dev); - pm_runtime_allow(&dev->dev); - } - - return 0; -} - -static int remove_iter(struct device *dev, void *data) -{ - if (dev->bus == &pcie_port_bus_type) - device_unregister(dev); - return 0; -} - -/** - * pcie_port_device_remove - unregister PCI Express port service devices - * @dev: PCI Express port the service devices to unregister are associated with - * - * Remove PCI Express port service devices associated with given port and - * disable MSI-X or MSI for the port. - */ -static void pcie_port_device_remove(struct pci_dev *dev) -{ - device_for_each_child(&dev->dev, NULL, remove_iter); - pci_free_irq_vectors(dev); - pci_disable_device(dev); -} - -static void pcie_portdrv_remove(struct pci_dev *dev) -{ - if (pci_bridge_d3_possible(dev)) { - pm_runtime_forbid(&dev->dev); - pm_runtime_get_noresume(&dev->dev); - pm_runtime_dont_use_autosuspend(&dev->dev); - } - - pcie_port_device_remove(dev); -} - -static pci_ers_result_t pcie_portdrv_error_detected(struct pci_dev *dev, - enum pci_channel_state error) -{ - /* Root Port has no impact. Always recovers. */ - return PCI_ERS_RESULT_CAN_RECOVER; -} - -static pci_ers_result_t pcie_portdrv_mmio_enabled(struct pci_dev *dev) -{ - return PCI_ERS_RESULT_RECOVERED; -} - -static pci_ers_result_t pcie_portdrv_slot_reset(struct pci_dev *dev) -{ - /* If fatal, restore cfg space for possible link reset at upstream */ - if (dev->error_state == pci_channel_io_frozen) { - dev->state_saved = true; - pci_restore_state(dev); - pcie_portdrv_restore_config(dev); - pci_enable_pcie_error_reporting(dev); - } - - return PCI_ERS_RESULT_RECOVERED; -} - -static int err_resume_iter(struct device *device, void *data) -{ - struct pcie_device *pcie_device; - struct pcie_port_service_driver *driver; - - if (device->bus == &pcie_port_bus_type && device->driver) { - driver = to_service_driver(device->driver); - if (driver && driver->error_resume) { - pcie_device = to_pcie_device(device); - - /* Forward error message to service drivers */ - driver->error_resume(pcie_device->port); - } - } - - return 0; -} - -static void pcie_portdrv_err_resume(struct pci_dev *dev) -{ - device_for_each_child(&dev->dev, NULL, err_resume_iter); -} - -static const struct pci_device_id port_pci_ids[] = { { - /* handle any PCI-Express port */ - PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) | 0x00), ~0), - }, - { } -}; - -static const struct pci_error_handlers pcie_portdrv_err_handler = { - .error_detected = pcie_portdrv_error_detected, - .mmio_enabled = pcie_portdrv_mmio_enabled, - .slot_reset = pcie_portdrv_slot_reset, - .resume = pcie_portdrv_err_resume, -}; - -static struct pci_driver pcie_portdriver = { - .name = "pcieport", - .id_table = port_pci_ids, - - .probe = pcie_portdrv_probe, - .remove = pcie_portdrv_remove, - .shutdown = pcie_portdrv_remove, - - .err_handler = &pcie_portdrv_err_handler, - - .driver.pm = PCIE_PORTDRV_PM_OPS, -}; - -static int __init dmi_pcie_pme_disable_msi(const struct dmi_system_id *d) -{ - pr_notice("%s detected: will not use MSI for PCIe PME signaling\n", - d->ident); - pcie_pme_disable_msi(); - return 0; -} - -static const struct dmi_system_id pcie_portdrv_dmi_table[] __initconst = { - /* - * Boxes that should not use MSI for PCIe PME signaling. - */ - { - .callback = dmi_pcie_pme_disable_msi, - .ident = "MSI Wind U-100", - .matches = { - DMI_MATCH(DMI_SYS_VENDOR, - "MICRO-STAR INTERNATIONAL CO., LTD"), - DMI_MATCH(DMI_PRODUCT_NAME, "U-100"), - }, - }, - { } -}; - -static int __init pcie_portdrv_init(void) -{ - if (pcie_ports_disabled) - return -EACCES; - - dmi_check_system(pcie_portdrv_dmi_table); - - return pci_register_driver(&pcie_portdriver); -} -device_initcall(pcie_portdrv_init);

[v1,9/9] PCI/portdrv: Rename portdrv_pci.c to portdrv.c

Commit Message

Patch