forked from Minki/linux
c29de84149
The PCI port driver saves the PCI state after initializing the device with the applicable service devices. This was, however, before the service drivers were even registered because PCI probe happens before the device_initcall initialized those service drivers. The config space state that the services set up were not being saved. The end result would cause PCI devices to not react to events that the drivers think they did if the PCI state ever needed to be restored. Fix this by changing the service drivers from using the init calls to having the portdrv driver calling the services directly. This will get the state saved as desired, while making the relationship between the port driver and the services under it more explicit in the code. Signed-off-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Sinan Kaya <okaya@kernel.org>
158 lines
4.5 KiB
C
158 lines
4.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Purpose: PCI Express Port Bus Driver's Internal Data Structures
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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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#ifndef _PORTDRV_H_
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#define _PORTDRV_H_
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#include <linux/compiler.h>
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/* Service Type */
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#define PCIE_PORT_SERVICE_PME_SHIFT 0 /* Power Management Event */
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#define PCIE_PORT_SERVICE_PME (1 << PCIE_PORT_SERVICE_PME_SHIFT)
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#define PCIE_PORT_SERVICE_AER_SHIFT 1 /* Advanced Error Reporting */
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#define PCIE_PORT_SERVICE_AER (1 << PCIE_PORT_SERVICE_AER_SHIFT)
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#define PCIE_PORT_SERVICE_HP_SHIFT 2 /* Native Hotplug */
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#define PCIE_PORT_SERVICE_HP (1 << PCIE_PORT_SERVICE_HP_SHIFT)
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#define PCIE_PORT_SERVICE_DPC_SHIFT 3 /* Downstream Port Containment */
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#define PCIE_PORT_SERVICE_DPC (1 << PCIE_PORT_SERVICE_DPC_SHIFT)
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#define PCIE_PORT_DEVICE_MAXSERVICES 4
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#ifdef CONFIG_PCIEAER
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int pcie_aer_init(void);
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#else
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static inline int pcie_aer_init(void) { return 0; }
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#endif
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#ifdef CONFIG_HOTPLUG_PCI_PCIE
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int pcie_hp_init(void);
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#else
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static inline int pcie_hp_init(void) { return 0; }
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#endif
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#ifdef CONFIG_PCIE_PME
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int pcie_pme_init(void);
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#else
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static inline int pcie_pme_init(void) { return 0; }
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#endif
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#ifdef CONFIG_PCIE_DPC
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int pcie_dpc_init(void);
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#else
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static inline int pcie_dpc_init(void) { return 0; }
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#endif
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/* Port Type */
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#define PCIE_ANY_PORT (~0)
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struct pcie_device {
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int irq; /* Service IRQ/MSI/MSI-X Vector */
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struct pci_dev *port; /* Root/Upstream/Downstream Port */
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u32 service; /* Port service this device represents */
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void *priv_data; /* Service Private Data */
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struct device device; /* Generic Device Interface */
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};
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#define to_pcie_device(d) container_of(d, struct pcie_device, device)
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static inline void set_service_data(struct pcie_device *dev, void *data)
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{
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dev->priv_data = data;
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}
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static inline void *get_service_data(struct pcie_device *dev)
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{
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return dev->priv_data;
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}
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struct pcie_port_service_driver {
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const char *name;
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int (*probe) (struct pcie_device *dev);
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void (*remove) (struct pcie_device *dev);
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int (*suspend) (struct pcie_device *dev);
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int (*resume_noirq) (struct pcie_device *dev);
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int (*resume) (struct pcie_device *dev);
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/* Device driver may resume normal operations */
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void (*error_resume)(struct pci_dev *dev);
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/* Link Reset Capability - AER service driver specific */
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pci_ers_result_t (*reset_link) (struct pci_dev *dev);
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int port_type; /* Type of the port this driver can handle */
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u32 service; /* Port service this device represents */
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struct device_driver driver;
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};
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#define to_service_driver(d) \
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container_of(d, struct pcie_port_service_driver, driver)
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int pcie_port_service_register(struct pcie_port_service_driver *new);
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void pcie_port_service_unregister(struct pcie_port_service_driver *new);
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/*
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* The PCIe Capability Interrupt Message Number (PCIe r3.1, sec 7.8.2) must
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* be one of the first 32 MSI-X entries. Per PCI r3.0, sec 6.8.3.1, MSI
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* supports a maximum of 32 vectors per function.
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*/
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#define PCIE_PORT_MAX_MSI_ENTRIES 32
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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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#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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#endif
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void pcie_port_device_remove(struct pci_dev *dev);
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int __must_check pcie_port_bus_register(void);
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void pcie_port_bus_unregister(void);
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struct pci_dev;
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#ifdef CONFIG_PCIE_PME
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extern bool pcie_pme_msi_disabled;
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static inline void pcie_pme_disable_msi(void)
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{
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pcie_pme_msi_disabled = true;
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}
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static inline bool pcie_pme_no_msi(void)
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{
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return pcie_pme_msi_disabled;
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}
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void pcie_pme_interrupt_enable(struct pci_dev *dev, bool enable);
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#else /* !CONFIG_PCIE_PME */
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static inline void pcie_pme_disable_msi(void) {}
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static inline bool pcie_pme_no_msi(void) { return false; }
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static inline void pcie_pme_interrupt_enable(struct pci_dev *dev, bool en) {}
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#endif /* !CONFIG_PCIE_PME */
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#ifdef CONFIG_ACPI_APEI
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int pcie_aer_get_firmware_first(struct pci_dev *pci_dev);
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#else
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static inline int pcie_aer_get_firmware_first(struct pci_dev *pci_dev)
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{
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if (pci_dev->__aer_firmware_first_valid)
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return pci_dev->__aer_firmware_first;
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return 0;
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}
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#endif
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#ifdef CONFIG_PCIEAER
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irqreturn_t aer_irq(int irq, void *context);
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#endif
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struct pcie_port_service_driver *pcie_port_find_service(struct pci_dev *dev,
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u32 service);
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struct device *pcie_port_find_device(struct pci_dev *dev, u32 service);
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#endif /* _PORTDRV_H_ */
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