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PCI/portdrv: Squash into portdrv.c
Squash portdrv_core.c and portdrv_pci.c into portdrv.c to make it easier to find things. The whole thing is less than 1000 lines, and it's a pain to bounce back and forth between two files. Several portdrv_core.c functions were non-static because they were referenced from portdrv_pci.c. Make them static since they're now all in portdrv.c. No functional change intended. Link: https://lore.kernel.org/r/20221019204127.44463-2-helgaas@kernel.org Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
Bjorn Helgaas
parent
9abf2313ad
commit
a1ccd3d911
4 changed files with 244 additions and 272 deletions
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@ -2,7 +2,7 @@
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#
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# Makefile for PCI Express features and port driver
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pcieportdrv-y := portdrv_core.o portdrv_pci.o rcec.o
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pcieportdrv-y := portdrv.o rcec.o
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obj-$(CONFIG_PCIEPORTBUS) += pcieportdrv.o
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@ -1,11 +1,13 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Purpose: PCI Express Port Bus Driver's Core Functions
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* Purpose: PCI Express Port Bus Driver
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*
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* Copyright (C) 2004 Intel
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* Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
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*/
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#include <linux/dmi.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/kernel.h>
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@ -308,7 +310,7 @@ static int pcie_device_init(struct pci_dev *pdev, int service, int irq)
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* Allocate the port extension structure and register services associated with
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* the port.
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*/
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int pcie_port_device_register(struct pci_dev *dev)
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static int pcie_port_device_register(struct pci_dev *dev)
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{
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int status, capabilities, i, nr_service;
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int irqs[PCIE_PORT_DEVICE_MAXSERVICES];
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@ -362,7 +364,7 @@ int pcie_port_device_register(struct pci_dev *dev)
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typedef int (*pcie_callback_t)(struct pcie_device *);
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int pcie_port_device_iter(struct device *dev, void *data)
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static int pcie_port_device_iter(struct device *dev, void *data)
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{
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struct pcie_port_service_driver *service_driver;
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size_t offset = *(size_t *)data;
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@ -382,13 +384,13 @@ int pcie_port_device_iter(struct device *dev, void *data)
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* pcie_port_device_suspend - suspend port services associated with a PCIe port
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* @dev: PCI Express port to handle
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*/
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int pcie_port_device_suspend(struct device *dev)
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static int pcie_port_device_suspend(struct device *dev)
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{
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size_t off = offsetof(struct pcie_port_service_driver, suspend);
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return device_for_each_child(dev, &off, pcie_port_device_iter);
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}
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int pcie_port_device_resume_noirq(struct device *dev)
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static int pcie_port_device_resume_noirq(struct device *dev)
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{
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size_t off = offsetof(struct pcie_port_service_driver, resume_noirq);
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return device_for_each_child(dev, &off, pcie_port_device_iter);
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@ -398,7 +400,7 @@ int pcie_port_device_resume_noirq(struct device *dev)
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* pcie_port_device_resume - resume port services associated with a PCIe port
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* @dev: PCI Express port to handle
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*/
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int pcie_port_device_resume(struct device *dev)
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static int pcie_port_device_resume(struct device *dev)
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{
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size_t off = offsetof(struct pcie_port_service_driver, resume);
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return device_for_each_child(dev, &off, pcie_port_device_iter);
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@ -408,7 +410,7 @@ int pcie_port_device_resume(struct device *dev)
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* pcie_port_device_runtime_suspend - runtime suspend port services
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* @dev: PCI Express port to handle
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*/
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int pcie_port_device_runtime_suspend(struct device *dev)
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static int pcie_port_device_runtime_suspend(struct device *dev)
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{
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size_t off = offsetof(struct pcie_port_service_driver, runtime_suspend);
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return device_for_each_child(dev, &off, pcie_port_device_iter);
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@ -418,7 +420,7 @@ int pcie_port_device_runtime_suspend(struct device *dev)
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* pcie_port_device_runtime_resume - runtime resume port services
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* @dev: PCI Express port to handle
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*/
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int pcie_port_device_runtime_resume(struct device *dev)
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static int pcie_port_device_runtime_resume(struct device *dev)
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{
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size_t off = offsetof(struct pcie_port_service_driver, runtime_resume);
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return device_for_each_child(dev, &off, pcie_port_device_iter);
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@ -482,7 +484,7 @@ EXPORT_SYMBOL_GPL(pcie_port_find_device);
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* Remove PCI Express port service devices associated with given port and
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* disable MSI-X or MSI for the port.
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*/
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void pcie_port_device_remove(struct pci_dev *dev)
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static void pcie_port_device_remove(struct pci_dev *dev)
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{
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device_for_each_child(&dev->dev, NULL, remove_iter);
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pci_free_irq_vectors(dev);
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@ -584,3 +586,235 @@ void pcie_port_service_unregister(struct pcie_port_service_driver *drv)
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driver_unregister(&drv->driver);
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}
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EXPORT_SYMBOL(pcie_port_service_unregister);
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/* If this switch is set, PCIe port native services should not be enabled. */
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bool pcie_ports_disabled;
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/*
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* If the user specified "pcie_ports=native", use the PCIe services regardless
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* of whether the platform has given us permission. On ACPI systems, this
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* means we ignore _OSC.
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*/
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bool pcie_ports_native;
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/*
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* If the user specified "pcie_ports=dpc-native", use the Linux DPC PCIe
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* service even if the platform hasn't given us permission.
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*/
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bool pcie_ports_dpc_native;
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static int __init pcie_port_setup(char *str)
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{
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if (!strncmp(str, "compat", 6))
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pcie_ports_disabled = true;
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else if (!strncmp(str, "native", 6))
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pcie_ports_native = true;
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else if (!strncmp(str, "dpc-native", 10))
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pcie_ports_dpc_native = true;
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return 1;
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}
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__setup("pcie_ports=", pcie_port_setup);
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/* global data */
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#ifdef CONFIG_PM
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static int pcie_port_runtime_suspend(struct device *dev)
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{
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if (!to_pci_dev(dev)->bridge_d3)
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return -EBUSY;
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return pcie_port_device_runtime_suspend(dev);
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}
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static int pcie_port_runtime_idle(struct device *dev)
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{
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/*
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* Assume the PCI core has set bridge_d3 whenever it thinks the port
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* should be good to go to D3. Everything else, including moving
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* the port to D3, is handled by the PCI core.
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*/
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return to_pci_dev(dev)->bridge_d3 ? 0 : -EBUSY;
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}
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static const struct dev_pm_ops pcie_portdrv_pm_ops = {
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.suspend = pcie_port_device_suspend,
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.resume_noirq = pcie_port_device_resume_noirq,
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.resume = pcie_port_device_resume,
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.freeze = pcie_port_device_suspend,
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.thaw = pcie_port_device_resume,
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.poweroff = pcie_port_device_suspend,
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.restore_noirq = pcie_port_device_resume_noirq,
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.restore = pcie_port_device_resume,
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.runtime_suspend = pcie_port_runtime_suspend,
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.runtime_resume = pcie_port_device_runtime_resume,
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.runtime_idle = pcie_port_runtime_idle,
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};
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#define PCIE_PORTDRV_PM_OPS (&pcie_portdrv_pm_ops)
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#else /* !PM */
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#define PCIE_PORTDRV_PM_OPS NULL
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#endif /* !PM */
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/*
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* pcie_portdrv_probe - Probe PCI-Express port devices
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* @dev: PCI-Express port device being probed
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*
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* If detected invokes the pcie_port_device_register() method for
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* this port device.
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*
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*/
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static int pcie_portdrv_probe(struct pci_dev *dev,
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const struct pci_device_id *id)
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{
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int type = pci_pcie_type(dev);
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int status;
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if (!pci_is_pcie(dev) ||
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((type != PCI_EXP_TYPE_ROOT_PORT) &&
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(type != PCI_EXP_TYPE_UPSTREAM) &&
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(type != PCI_EXP_TYPE_DOWNSTREAM) &&
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(type != PCI_EXP_TYPE_RC_EC)))
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return -ENODEV;
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if (type == PCI_EXP_TYPE_RC_EC)
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pcie_link_rcec(dev);
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status = pcie_port_device_register(dev);
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if (status)
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return status;
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pci_save_state(dev);
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dev_pm_set_driver_flags(&dev->dev, DPM_FLAG_NO_DIRECT_COMPLETE |
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DPM_FLAG_SMART_SUSPEND);
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if (pci_bridge_d3_possible(dev)) {
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/*
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* Keep the port resumed 100ms to make sure things like
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* config space accesses from userspace (lspci) will not
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* cause the port to repeatedly suspend and resume.
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*/
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pm_runtime_set_autosuspend_delay(&dev->dev, 100);
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pm_runtime_use_autosuspend(&dev->dev);
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pm_runtime_mark_last_busy(&dev->dev);
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pm_runtime_put_autosuspend(&dev->dev);
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pm_runtime_allow(&dev->dev);
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}
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return 0;
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}
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static void pcie_portdrv_remove(struct pci_dev *dev)
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{
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if (pci_bridge_d3_possible(dev)) {
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pm_runtime_forbid(&dev->dev);
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pm_runtime_get_noresume(&dev->dev);
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pm_runtime_dont_use_autosuspend(&dev->dev);
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}
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pcie_port_device_remove(dev);
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}
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static pci_ers_result_t pcie_portdrv_error_detected(struct pci_dev *dev,
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pci_channel_state_t error)
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{
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if (error == pci_channel_io_frozen)
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return PCI_ERS_RESULT_NEED_RESET;
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return PCI_ERS_RESULT_CAN_RECOVER;
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}
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static pci_ers_result_t pcie_portdrv_slot_reset(struct pci_dev *dev)
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{
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size_t off = offsetof(struct pcie_port_service_driver, slot_reset);
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device_for_each_child(&dev->dev, &off, pcie_port_device_iter);
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pci_restore_state(dev);
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pci_save_state(dev);
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return PCI_ERS_RESULT_RECOVERED;
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}
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static pci_ers_result_t pcie_portdrv_mmio_enabled(struct pci_dev *dev)
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{
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return PCI_ERS_RESULT_RECOVERED;
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}
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/*
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* LINUX Device Driver Model
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*/
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static const struct pci_device_id port_pci_ids[] = {
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/* handle any PCI-Express port */
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{ PCI_DEVICE_CLASS(PCI_CLASS_BRIDGE_PCI_NORMAL, ~0) },
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/* subtractive decode PCI-to-PCI bridge, class type is 060401h */
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{ PCI_DEVICE_CLASS(PCI_CLASS_BRIDGE_PCI_SUBTRACTIVE, ~0) },
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/* handle any Root Complex Event Collector */
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{ PCI_DEVICE_CLASS(((PCI_CLASS_SYSTEM_RCEC << 8) | 0x00), ~0) },
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{ },
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};
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static const struct pci_error_handlers pcie_portdrv_err_handler = {
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.error_detected = pcie_portdrv_error_detected,
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.slot_reset = pcie_portdrv_slot_reset,
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.mmio_enabled = pcie_portdrv_mmio_enabled,
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};
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static struct pci_driver pcie_portdriver = {
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.name = "pcieport",
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.id_table = &port_pci_ids[0],
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.probe = pcie_portdrv_probe,
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.remove = pcie_portdrv_remove,
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.shutdown = pcie_portdrv_remove,
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.err_handler = &pcie_portdrv_err_handler,
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.driver_managed_dma = true,
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.driver.pm = PCIE_PORTDRV_PM_OPS,
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};
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static int __init dmi_pcie_pme_disable_msi(const struct dmi_system_id *d)
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{
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pr_notice("%s detected: will not use MSI for PCIe PME signaling\n",
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d->ident);
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pcie_pme_disable_msi();
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return 0;
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}
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static const struct dmi_system_id pcie_portdrv_dmi_table[] __initconst = {
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/*
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* Boxes that should not use MSI for PCIe PME signaling.
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*/
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{
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.callback = dmi_pcie_pme_disable_msi,
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.ident = "MSI Wind U-100",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR,
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"MICRO-STAR INTERNATIONAL CO., LTD"),
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DMI_MATCH(DMI_PRODUCT_NAME, "U-100"),
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},
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},
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{}
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};
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static void __init pcie_init_services(void)
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{
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pcie_aer_init();
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pcie_pme_init();
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pcie_dpc_init();
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pcie_hp_init();
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}
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static int __init pcie_portdrv_init(void)
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{
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if (pcie_ports_disabled)
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return -EACCES;
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pcie_init_services();
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dmi_check_system(pcie_portdrv_dmi_table);
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return pci_register_driver(&pcie_portdriver);
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}
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device_initcall(pcie_portdrv_init);
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@ -108,16 +108,6 @@ void pcie_port_service_unregister(struct pcie_port_service_driver *new);
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#define get_descriptor_id(type, service) (((type - 4) << 8) | service)
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extern struct bus_type pcie_port_bus_type;
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int pcie_port_device_register(struct pci_dev *dev);
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int pcie_port_device_iter(struct device *dev, void *data);
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#ifdef CONFIG_PM
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int pcie_port_device_suspend(struct device *dev);
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int pcie_port_device_resume_noirq(struct device *dev);
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int pcie_port_device_resume(struct device *dev);
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int pcie_port_device_runtime_suspend(struct device *dev);
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int pcie_port_device_runtime_resume(struct device *dev);
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#endif
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void pcie_port_device_remove(struct pci_dev *dev);
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struct pci_dev;
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@ -1,252 +0,0 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Purpose: PCI Express Port Bus Driver
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* Author: Tom Nguyen <tom.l.nguyen@intel.com>
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*
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* Copyright (C) 2004 Intel
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* Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
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*/
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#include <linux/pci.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/pm.h>
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#include <linux/pm_runtime.h>
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#include <linux/init.h>
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#include <linux/aer.h>
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#include <linux/dmi.h>
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#include "../pci.h"
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#include "portdrv.h"
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/* If this switch is set, PCIe port native services should not be enabled. */
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bool pcie_ports_disabled;
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/*
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* If the user specified "pcie_ports=native", use the PCIe services regardless
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* of whether the platform has given us permission. On ACPI systems, this
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* means we ignore _OSC.
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*/
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bool pcie_ports_native;
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/*
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* If the user specified "pcie_ports=dpc-native", use the Linux DPC PCIe
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* service even if the platform hasn't given us permission.
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*/
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bool pcie_ports_dpc_native;
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static int __init pcie_port_setup(char *str)
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{
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if (!strncmp(str, "compat", 6))
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pcie_ports_disabled = true;
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else if (!strncmp(str, "native", 6))
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pcie_ports_native = true;
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else if (!strncmp(str, "dpc-native", 10))
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pcie_ports_dpc_native = true;
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return 1;
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}
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__setup("pcie_ports=", pcie_port_setup);
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/* global data */
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#ifdef CONFIG_PM
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static int pcie_port_runtime_suspend(struct device *dev)
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{
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if (!to_pci_dev(dev)->bridge_d3)
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return -EBUSY;
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return pcie_port_device_runtime_suspend(dev);
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}
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static int pcie_port_runtime_idle(struct device *dev)
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{
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/*
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* Assume the PCI core has set bridge_d3 whenever it thinks the port
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* should be good to go to D3. Everything else, including moving
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* the port to D3, is handled by the PCI core.
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*/
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return to_pci_dev(dev)->bridge_d3 ? 0 : -EBUSY;
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}
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static const struct dev_pm_ops pcie_portdrv_pm_ops = {
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.suspend = pcie_port_device_suspend,
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.resume_noirq = pcie_port_device_resume_noirq,
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.resume = pcie_port_device_resume,
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.freeze = pcie_port_device_suspend,
|
||||
.thaw = pcie_port_device_resume,
|
||||
.poweroff = pcie_port_device_suspend,
|
||||
.restore_noirq = pcie_port_device_resume_noirq,
|
||||
.restore = pcie_port_device_resume,
|
||||
.runtime_suspend = pcie_port_runtime_suspend,
|
||||
.runtime_resume = pcie_port_device_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 */
|
||||
|
||||
/*
|
||||
* 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 type = pci_pcie_type(dev);
|
||||
int status;
|
||||
|
||||
if (!pci_is_pcie(dev) ||
|
||||
((type != PCI_EXP_TYPE_ROOT_PORT) &&
|
||||
(type != PCI_EXP_TYPE_UPSTREAM) &&
|
||||
(type != PCI_EXP_TYPE_DOWNSTREAM) &&
|
||||
(type != PCI_EXP_TYPE_RC_EC)))
|
||||
return -ENODEV;
|
||||
|
||||
if (type == PCI_EXP_TYPE_RC_EC)
|
||||
pcie_link_rcec(dev);
|
||||
|
||||
status = pcie_port_device_register(dev);
|
||||
if (status)
|
||||
return status;
|
||||
|
||||
pci_save_state(dev);
|
||||
|
||||
dev_pm_set_driver_flags(&dev->dev, DPM_FLAG_NO_DIRECT_COMPLETE |
|
||||
DPM_FLAG_SMART_SUSPEND);
|
||||
|
||||
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 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,
|
||||
pci_channel_state_t error)
|
||||
{
|
||||
if (error == pci_channel_io_frozen)
|
||||
return PCI_ERS_RESULT_NEED_RESET;
|
||||
return PCI_ERS_RESULT_CAN_RECOVER;
|
||||
}
|
||||
|
||||
static pci_ers_result_t pcie_portdrv_slot_reset(struct pci_dev *dev)
|
||||
{
|
||||
size_t off = offsetof(struct pcie_port_service_driver, slot_reset);
|
||||
device_for_each_child(&dev->dev, &off, pcie_port_device_iter);
|
||||
|
||||
pci_restore_state(dev);
|
||||
pci_save_state(dev);
|
||||
return PCI_ERS_RESULT_RECOVERED;
|
||||
}
|
||||
|
||||
static pci_ers_result_t pcie_portdrv_mmio_enabled(struct pci_dev *dev)
|
||||
{
|
||||
return PCI_ERS_RESULT_RECOVERED;
|
||||
}
|
||||
|
||||
/*
|
||||
* LINUX Device Driver Model
|
||||
*/
|
||||
static const struct pci_device_id port_pci_ids[] = {
|
||||
/* handle any PCI-Express port */
|
||||
{ PCI_DEVICE_CLASS(PCI_CLASS_BRIDGE_PCI_NORMAL, ~0) },
|
||||
/* subtractive decode PCI-to-PCI bridge, class type is 060401h */
|
||||
{ PCI_DEVICE_CLASS(PCI_CLASS_BRIDGE_PCI_SUBTRACTIVE, ~0) },
|
||||
/* handle any Root Complex Event Collector */
|
||||
{ PCI_DEVICE_CLASS(((PCI_CLASS_SYSTEM_RCEC << 8) | 0x00), ~0) },
|
||||
{ },
|
||||
};
|
||||
|
||||
static const struct pci_error_handlers pcie_portdrv_err_handler = {
|
||||
.error_detected = pcie_portdrv_error_detected,
|
||||
.slot_reset = pcie_portdrv_slot_reset,
|
||||
.mmio_enabled = pcie_portdrv_mmio_enabled,
|
||||
};
|
||||
|
||||
static struct pci_driver pcie_portdriver = {
|
||||
.name = "pcieport",
|
||||
.id_table = &port_pci_ids[0],
|
||||
|
||||
.probe = pcie_portdrv_probe,
|
||||
.remove = pcie_portdrv_remove,
|
||||
.shutdown = pcie_portdrv_remove,
|
||||
|
||||
.err_handler = &pcie_portdrv_err_handler,
|
||||
|
||||
.driver_managed_dma = true,
|
||||
|
||||
.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 void __init pcie_init_services(void)
|
||||
{
|
||||
pcie_aer_init();
|
||||
pcie_pme_init();
|
||||
pcie_dpc_init();
|
||||
pcie_hp_init();
|
||||
}
|
||||
|
||||
static int __init pcie_portdrv_init(void)
|
||||
{
|
||||
if (pcie_ports_disabled)
|
||||
return -EACCES;
|
||||
|
||||
pcie_init_services();
|
||||
dmi_check_system(pcie_portdrv_dmi_table);
|
||||
|
||||
return pci_register_driver(&pcie_portdriver);
|
||||
}
|
||||
device_initcall(pcie_portdrv_init);
|
||||
Loading…
Reference in a new issue