1 /* SPDX-License-Identifier: GPL-2.0 */
4 * Purpose: PCI Express Port Bus Driver's Data Structures
6 * Copyright (C) 2004 Intel
7 * Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
13 #include <linux/compiler.h>
16 #define PCIE_PORT_SERVICE_PME_SHIFT 0 /* Power Management Event */
17 #define PCIE_PORT_SERVICE_PME (1 << PCIE_PORT_SERVICE_PME_SHIFT)
18 #define PCIE_PORT_SERVICE_AER_SHIFT 1 /* Advanced Error Reporting */
19 #define PCIE_PORT_SERVICE_AER (1 << PCIE_PORT_SERVICE_AER_SHIFT)
20 #define PCIE_PORT_SERVICE_HP_SHIFT 2 /* Native Hotplug */
21 #define PCIE_PORT_SERVICE_HP (1 << PCIE_PORT_SERVICE_HP_SHIFT)
22 #define PCIE_PORT_SERVICE_VC_SHIFT 3 /* Virtual Channel */
23 #define PCIE_PORT_SERVICE_VC (1 << PCIE_PORT_SERVICE_VC_SHIFT)
24 #define PCIE_PORT_SERVICE_DPC_SHIFT 4 /* Downstream Port Containment */
25 #define PCIE_PORT_SERVICE_DPC (1 << PCIE_PORT_SERVICE_DPC_SHIFT)
27 #define PCIE_PORT_DEVICE_MAXSERVICES 5
30 #define PCIE_ANY_PORT (~0)
33 int irq; /* Service IRQ/MSI/MSI-X Vector */
34 struct pci_dev *port; /* Root/Upstream/Downstream Port */
35 u32 service; /* Port service this device represents */
36 void *priv_data; /* Service Private Data */
37 struct device device; /* Generic Device Interface */
39 #define to_pcie_device(d) container_of(d, struct pcie_device, device)
41 static inline void set_service_data(struct pcie_device *dev, void *data)
43 dev->priv_data = data;
46 static inline void *get_service_data(struct pcie_device *dev)
48 return dev->priv_data;
51 struct pcie_port_service_driver {
53 int (*probe) (struct pcie_device *dev);
54 void (*remove) (struct pcie_device *dev);
55 int (*suspend) (struct pcie_device *dev);
56 int (*resume) (struct pcie_device *dev);
58 /* Device driver may resume normal operations */
59 void (*error_resume)(struct pci_dev *dev);
61 /* Link Reset Capability - AER service driver specific */
62 pci_ers_result_t (*reset_link) (struct pci_dev *dev);
64 int port_type; /* Type of the port this driver can handle */
65 u32 service; /* Port service this device represents */
67 struct device_driver driver;
69 #define to_service_driver(d) \
70 container_of(d, struct pcie_port_service_driver, driver)
72 int pcie_port_service_register(struct pcie_port_service_driver *new);
73 void pcie_port_service_unregister(struct pcie_port_service_driver *new);
76 * The PCIe Capability Interrupt Message Number (PCIe r3.1, sec 7.8.2) must
77 * be one of the first 32 MSI-X entries. Per PCI r3.0, sec 6.8.3.1, MSI
78 * supports a maximum of 32 vectors per function.
80 #define PCIE_PORT_MAX_MSI_ENTRIES 32
82 #define get_descriptor_id(type, service) (((type - 4) << 8) | service)
84 extern struct bus_type pcie_port_bus_type;
85 int pcie_port_device_register(struct pci_dev *dev);
87 int pcie_port_device_suspend(struct device *dev);
88 int pcie_port_device_resume(struct device *dev);
90 void pcie_port_device_remove(struct pci_dev *dev);
91 int __must_check pcie_port_bus_register(void);
92 void pcie_port_bus_unregister(void);
96 void pcie_clear_root_pme_status(struct pci_dev *dev);
98 #ifdef CONFIG_HOTPLUG_PCI_PCIE
99 extern bool pciehp_msi_disabled;
101 static inline bool pciehp_no_msi(void)
103 return pciehp_msi_disabled;
106 #else /* !CONFIG_HOTPLUG_PCI_PCIE */
107 static inline bool pciehp_no_msi(void) { return false; }
108 #endif /* !CONFIG_HOTPLUG_PCI_PCIE */
110 #ifdef CONFIG_PCIE_PME
111 extern bool pcie_pme_msi_disabled;
113 static inline void pcie_pme_disable_msi(void)
115 pcie_pme_msi_disabled = true;
118 static inline bool pcie_pme_no_msi(void)
120 return pcie_pme_msi_disabled;
123 void pcie_pme_interrupt_enable(struct pci_dev *dev, bool enable);
124 #else /* !CONFIG_PCIE_PME */
125 static inline void pcie_pme_disable_msi(void) {}
126 static inline bool pcie_pme_no_msi(void) { return false; }
127 static inline void pcie_pme_interrupt_enable(struct pci_dev *dev, bool en) {}
128 #endif /* !CONFIG_PCIE_PME */
131 void pcie_port_acpi_setup(struct pci_dev *port, int *mask);
133 static inline void pcie_port_platform_notify(struct pci_dev *port, int *mask)
135 pcie_port_acpi_setup(port, mask);
137 #else /* !CONFIG_ACPI */
138 static inline void pcie_port_platform_notify(struct pci_dev *port, int *mask){}
139 #endif /* !CONFIG_ACPI */
141 #endif /* _PORTDRV_H_ */