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/* SPDX-License-Identifier: GPL-2.0 */ /** * PCI Endpoint *Function* (EPF) header file * * Copyright (C) 2017 Texas Instruments * Author: Kishon Vijay Abraham I <kishon@ti.com> */ #ifndef __LINUX_PCI_EPF_H #define __LINUX_PCI_EPF_H #include <linux/device.h> #include <linux/mod_devicetable.h> #include <linux/pci.h> struct pci_epf; enum pci_barno { BAR_0, BAR_1, BAR_2, BAR_3, BAR_4, BAR_5, }; /** * struct pci_epf_header - represents standard configuration header * @vendorid: identifies device manufacturer * @deviceid: identifies a particular device * @revid: specifies a device-specific revision identifier * @progif_code: identifies a specific register-level programming interface * @subclass_code: identifies more specifically the function of the device * @baseclass_code: broadly classifies the type of function the device performs * @cache_line_size: specifies the system cacheline size in units of DWORDs * @subsys_vendor_id: vendor of the add-in card or subsystem * @subsys_id: id specific to vendor * @interrupt_pin: interrupt pin the device (or device function) uses */ struct pci_epf_header { u16 vendorid; u16 deviceid; u8 revid; u8 progif_code; u8 subclass_code; u8 baseclass_code; u8 cache_line_size; u16 subsys_vendor_id; u16 subsys_id; enum pci_interrupt_pin interrupt_pin; }; /** * struct pci_epf_ops - set of function pointers for performing EPF operations * @bind: ops to perform when a EPC device has been bound to EPF device * @unbind: ops to perform when a binding has been lost between a EPC device * and EPF device * @linkup: ops to perform when the EPC device has established a connection with * a host system */ struct pci_epf_ops { int (*bind)(struct pci_epf *epf); void (*unbind)(struct pci_epf *epf); void (*linkup)(struct pci_epf *epf); }; /** * struct pci_epf_driver - represents the PCI EPF driver * @probe: ops to perform when a new EPF device has been bound to the EPF driver * @remove: ops to perform when the binding between the EPF device and EPF * driver is broken * @driver: PCI EPF driver * @ops: set of function pointers for performing EPF operations * @owner: the owner of the module that registers the PCI EPF driver * @epf_group: list of configfs group corresponding to the PCI EPF driver * @id_table: identifies EPF devices for probing */ struct pci_epf_driver { int (*probe)(struct pci_epf *epf); int (*remove)(struct pci_epf *epf); struct device_driver driver; struct pci_epf_ops *ops; struct module *owner; struct list_head epf_group; const struct pci_epf_device_id *id_table; }; #define to_pci_epf_driver(drv) (container_of((drv), struct pci_epf_driver, \ driver)) /** * struct pci_epf_bar - represents the BAR of EPF device * @phys_addr: physical address that should be mapped to the BAR * @size: the size of the address space present in BAR */ struct pci_epf_bar { dma_addr_t phys_addr; size_t size; enum pci_barno barno; int flags; }; /** * struct pci_epf - represents the PCI EPF device * @dev: the PCI EPF device * @name: the name of the PCI EPF device * @header: represents standard configuration header * @bar: represents the BAR of EPF device * @msi_interrupts: number of MSI interrupts required by this function * @func_no: unique function number within this endpoint device * @epc: the EPC device to which this EPF device is bound * @driver: the EPF driver to which this EPF device is bound * @list: to add pci_epf as a list of PCI endpoint functions to pci_epc */ struct pci_epf { struct device dev; const char *name; struct pci_epf_header *header; struct pci_epf_bar bar[6]; u8 msi_interrupts; u16 msix_interrupts; u8 func_no; struct pci_epc *epc; struct pci_epf_driver *driver; struct list_head list; }; #define to_pci_epf(epf_dev) container_of((epf_dev), struct pci_epf, dev) #define pci_epf_register_driver(driver) \ __pci_epf_register_driver((driver), THIS_MODULE) static inline void epf_set_drvdata(struct pci_epf *epf, void *data) { dev_set_drvdata(&epf->dev, data); } static inline void *epf_get_drvdata(struct pci_epf *epf) { return dev_get_drvdata(&epf->dev); } const struct pci_epf_device_id * pci_epf_match_device(const struct pci_epf_device_id *id, struct pci_epf *epf); struct pci_epf *pci_epf_create(const char *name); void pci_epf_destroy(struct pci_epf *epf); int __pci_epf_register_driver(struct pci_epf_driver *driver, struct module *owner); void pci_epf_unregister_driver(struct pci_epf_driver *driver); void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar, size_t align); void pci_epf_free_space(struct pci_epf *epf, void *addr, enum pci_barno bar); int pci_epf_bind(struct pci_epf *epf); void pci_epf_unbind(struct pci_epf *epf); void pci_epf_linkup(struct pci_epf *epf); #endif /* __LINUX_PCI_EPF_H */
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