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linux-headers-6.8.0-36-generic
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pci-epc.h
/* SPDX-License-Identifier: GPL-2.0 */ /* * PCI Endpoint *Controller* (EPC) header file * * Copyright (C) 2017 Texas Instruments * Author: Kishon Vijay Abraham I <kishon@ti.com> */ #ifndef __LINUX_PCI_EPC_H #define __LINUX_PCI_EPC_H #include <linux/pci-epf.h> struct pci_epc; enum pci_epc_interface_type { UNKNOWN_INTERFACE = -1, PRIMARY_INTERFACE, SECONDARY_INTERFACE, }; static inline const char * pci_epc_interface_string(enum pci_epc_interface_type type) { switch (type) { case PRIMARY_INTERFACE: return "primary"; case SECONDARY_INTERFACE: return "secondary"; default: return "UNKNOWN interface"; } } /** * struct pci_epc_ops - set of function pointers for performing EPC operations * @write_header: ops to populate configuration space header * @set_bar: ops to configure the BAR * @clear_bar: ops to reset the BAR * @map_addr: ops to map CPU address to PCI address * @unmap_addr: ops to unmap CPU address and PCI address * @set_msi: ops to set the requested number of MSI interrupts in the MSI * capability register * @get_msi: ops to get the number of MSI interrupts allocated by the RC from * the MSI capability register * @set_msix: ops to set the requested number of MSI-X interrupts in the * MSI-X capability register * @get_msix: ops to get the number of MSI-X interrupts allocated by the RC * from the MSI-X capability register * @raise_irq: ops to raise a legacy, MSI or MSI-X interrupt * @map_msi_irq: ops to map physical address to MSI address and return MSI data * @start: ops to start the PCI link * @stop: ops to stop the PCI link * @get_features: ops to get the features supported by the EPC * @owner: the module owner containing the ops */ struct pci_epc_ops { int (*write_header)(struct pci_epc *epc, u8 func_no, u8 vfunc_no, struct pci_epf_header *hdr); int (*set_bar)(struct pci_epc *epc, u8 func_no, u8 vfunc_no, struct pci_epf_bar *epf_bar); void (*clear_bar)(struct pci_epc *epc, u8 func_no, u8 vfunc_no, struct pci_epf_bar *epf_bar); int (*map_addr)(struct pci_epc *epc, u8 func_no, u8 vfunc_no, phys_addr_t addr, u64 pci_addr, size_t size); void (*unmap_addr)(struct pci_epc *epc, u8 func_no, u8 vfunc_no, phys_addr_t addr); int (*set_msi)(struct pci_epc *epc, u8 func_no, u8 vfunc_no, u8 interrupts); int (*get_msi)(struct pci_epc *epc, u8 func_no, u8 vfunc_no); int (*set_msix)(struct pci_epc *epc, u8 func_no, u8 vfunc_no, u16 interrupts, enum pci_barno, u32 offset); int (*get_msix)(struct pci_epc *epc, u8 func_no, u8 vfunc_no); int (*raise_irq)(struct pci_epc *epc, u8 func_no, u8 vfunc_no, unsigned int type, u16 interrupt_num); int (*map_msi_irq)(struct pci_epc *epc, u8 func_no, u8 vfunc_no, phys_addr_t phys_addr, u8 interrupt_num, u32 entry_size, u32 *msi_data, u32 *msi_addr_offset); int (*start)(struct pci_epc *epc); void (*stop)(struct pci_epc *epc); const struct pci_epc_features* (*get_features)(struct pci_epc *epc, u8 func_no, u8 vfunc_no); struct module *owner; }; /** * struct pci_epc_mem_window - address window of the endpoint controller * @phys_base: physical base address of the PCI address window * @size: the size of the PCI address window * @page_size: size of each page */ struct pci_epc_mem_window { phys_addr_t phys_base; size_t size; size_t page_size; }; /** * struct pci_epc_mem - address space of the endpoint controller * @window: address window of the endpoint controller * @bitmap: bitmap to manage the PCI address space * @pages: number of bits representing the address region * @lock: mutex to protect bitmap */ struct pci_epc_mem { struct pci_epc_mem_window window; unsigned long *bitmap; int pages; /* mutex to protect against concurrent access for memory allocation*/ struct mutex lock; }; /** * struct pci_epc - represents the PCI EPC device * @dev: PCI EPC device * @pci_epf: list of endpoint functions present in this EPC device * @list_lock: Mutex for protecting pci_epf list * @ops: function pointers for performing endpoint operations * @windows: array of address space of the endpoint controller * @mem: first window of the endpoint controller, which corresponds to * default address space of the endpoint controller supporting * single window. * @num_windows: number of windows supported by device * @max_functions: max number of functions that can be configured in this EPC * @max_vfs: Array indicating the maximum number of virtual functions that can * be associated with each physical function * @group: configfs group representing the PCI EPC device * @lock: mutex to protect pci_epc ops * @function_num_map: bitmap to manage physical function number */ struct pci_epc { struct device dev; struct list_head pci_epf; struct mutex list_lock; const struct pci_epc_ops *ops; struct pci_epc_mem **windows; struct pci_epc_mem *mem; unsigned int num_windows; u8 max_functions; u8 *max_vfs; struct config_group *group; /* mutex to protect against concurrent access of EP controller */ struct mutex lock; unsigned long function_num_map; }; /** * struct pci_epc_features - features supported by a EPC device per function * @linkup_notifier: indicate if the EPC device can notify EPF driver on link up * @core_init_notifier: indicate cores that can notify about their availability * for initialization * @msi_capable: indicate if the endpoint function has MSI capability * @msix_capable: indicate if the endpoint function has MSI-X capability * @reserved_bar: bitmap to indicate reserved BAR unavailable to function driver * @bar_fixed_64bit: bitmap to indicate fixed 64bit BARs * @bar_fixed_size: Array specifying the size supported by each BAR * @align: alignment size required for BAR buffer allocation */ struct pci_epc_features { unsigned int linkup_notifier : 1; unsigned int core_init_notifier : 1; unsigned int msi_capable : 1; unsigned int msix_capable : 1; u8 reserved_bar; u8 bar_fixed_64bit; u64 bar_fixed_size[PCI_STD_NUM_BARS]; size_t align; }; #define to_pci_epc(device) container_of((device), struct pci_epc, dev) #define pci_epc_create(dev, ops) \ __pci_epc_create((dev), (ops), THIS_MODULE) #define devm_pci_epc_create(dev, ops) \ __devm_pci_epc_create((dev), (ops), THIS_MODULE) static inline void epc_set_drvdata(struct pci_epc *epc, void *data) { dev_set_drvdata(&epc->dev, data); } static inline void *epc_get_drvdata(struct pci_epc *epc) { return dev_get_drvdata(&epc->dev); } struct pci_epc * __devm_pci_epc_create(struct device *dev, const struct pci_epc_ops *ops, struct module *owner); struct pci_epc * __pci_epc_create(struct device *dev, const struct pci_epc_ops *ops, struct module *owner); void devm_pci_epc_destroy(struct device *dev, struct pci_epc *epc); void pci_epc_destroy(struct pci_epc *epc); int pci_epc_add_epf(struct pci_epc *epc, struct pci_epf *epf, enum pci_epc_interface_type type); void pci_epc_linkup(struct pci_epc *epc); void pci_epc_linkdown(struct pci_epc *epc); void pci_epc_init_notify(struct pci_epc *epc); void pci_epc_bme_notify(struct pci_epc *epc); void pci_epc_remove_epf(struct pci_epc *epc, struct pci_epf *epf, enum pci_epc_interface_type type); int pci_epc_write_header(struct pci_epc *epc, u8 func_no, u8 vfunc_no, struct pci_epf_header *hdr); int pci_epc_set_bar(struct pci_epc *epc, u8 func_no, u8 vfunc_no, struct pci_epf_bar *epf_bar); void pci_epc_clear_bar(struct pci_epc *epc, u8 func_no, u8 vfunc_no, struct pci_epf_bar *epf_bar); int pci_epc_map_addr(struct pci_epc *epc, u8 func_no, u8 vfunc_no, phys_addr_t phys_addr, u64 pci_addr, size_t size); void pci_epc_unmap_addr(struct pci_epc *epc, u8 func_no, u8 vfunc_no, phys_addr_t phys_addr); int pci_epc_set_msi(struct pci_epc *epc, u8 func_no, u8 vfunc_no, u8 interrupts); int pci_epc_get_msi(struct pci_epc *epc, u8 func_no, u8 vfunc_no); int pci_epc_set_msix(struct pci_epc *epc, u8 func_no, u8 vfunc_no, u16 interrupts, enum pci_barno, u32 offset); int pci_epc_get_msix(struct pci_epc *epc, u8 func_no, u8 vfunc_no); int pci_epc_map_msi_irq(struct pci_epc *epc, u8 func_no, u8 vfunc_no, phys_addr_t phys_addr, u8 interrupt_num, u32 entry_size, u32 *msi_data, u32 *msi_addr_offset); int pci_epc_raise_irq(struct pci_epc *epc, u8 func_no, u8 vfunc_no, unsigned int type, u16 interrupt_num); int pci_epc_start(struct pci_epc *epc); void pci_epc_stop(struct pci_epc *epc); const struct pci_epc_features *pci_epc_get_features(struct pci_epc *epc, u8 func_no, u8 vfunc_no); enum pci_barno pci_epc_get_first_free_bar(const struct pci_epc_features *epc_features); enum pci_barno pci_epc_get_next_free_bar(const struct pci_epc_features *epc_features, enum pci_barno bar); struct pci_epc *pci_epc_get(const char *epc_name); void pci_epc_put(struct pci_epc *epc); int pci_epc_mem_init(struct pci_epc *epc, phys_addr_t base, size_t size, size_t page_size); int pci_epc_multi_mem_init(struct pci_epc *epc, struct pci_epc_mem_window *window, unsigned int num_windows); void pci_epc_mem_exit(struct pci_epc *epc); void __iomem *pci_epc_mem_alloc_addr(struct pci_epc *epc, phys_addr_t *phys_addr, size_t size); void pci_epc_mem_free_addr(struct pci_epc *epc, phys_addr_t phys_addr, void __iomem *virt_addr, size_t size); #endif /* __LINUX_PCI_EPC_H */
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