/** * 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 * @add_cfs: ops to initialize function-specific configfs attributes
*/ struct pci_epf_ops { int (*bind)(struct pci_epf *epf); void (*unbind)(struct pci_epf *epf); struct config_group *(*add_cfs)(struct pci_epf *epf, struct config_group *group);
};
/** * struct pci_epc_event_ops - Callbacks for capturing the EPC events * @epc_init: Callback for the EPC initialization complete event * @epc_deinit: Callback for the EPC deinitialization event * @link_up: Callback for the EPC link up event * @link_down: Callback for the EPC link down event * @bus_master_enable: Callback for the EPC Bus Master Enable event
*/ struct pci_epc_event_ops { int (*epc_init)(struct pci_epf *epf); void (*epc_deinit)(struct pci_epf *epf); int (*link_up)(struct pci_epf *epf); int (*link_down)(struct pci_epf *epf); int (*bus_master_enable)(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, conststruct pci_epf_device_id *id); void (*remove)(struct pci_epf *epf);
/** * struct pci_epf_bar - represents the BAR of EPF device * @phys_addr: physical address that should be mapped to the BAR * @addr: virtual address corresponding to the @phys_addr * @size: the size of the address space present in BAR * @aligned_size: the size actually allocated to accommodate the iATU alignment * requirement * @barno: BAR number * @flags: flags that are set for the BAR
*/ struct pci_epf_bar {
dma_addr_t phys_addr; void *addr;
size_t size;
size_t aligned_size; enum pci_barno barno; int flags;
};
/** * struct pci_epf_doorbell_msg - represents doorbell message * @msg: MSI message * @virq: IRQ number of this doorbell MSI message
*/ struct pci_epf_doorbell_msg { struct msi_msg msg; int virq;
};
/** * 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 * @msix_interrupts: number of MSI-X interrupts required by this function * @func_no: unique (physical) function number within this endpoint device * @vfunc_no: unique virtual function number within a physical function * @epc: the EPC device to which this EPF device is bound * @epf_pf: the physical EPF device to which this virtual EPF device is bound * @driver: the EPF driver to which this EPF device is bound * @id: pointer to the EPF device ID * @list: to add pci_epf as a list of PCI endpoint functions to pci_epc * @lock: mutex to protect pci_epf_ops * @sec_epc: the secondary EPC device to which this EPF device is bound * @sec_epc_list: to add pci_epf as list of PCI endpoint functions to secondary * EPC device * @sec_epc_bar: represents the BAR of EPF device associated with secondary EPC * @sec_epc_func_no: unique (physical) function number within the secondary EPC * @group: configfs group associated with the EPF device * @is_bound: indicates if bind notification to function driver has been invoked * @is_vf: true - virtual function, false - physical function * @vfunction_num_map: bitmap to manage virtual function number * @pci_vepf: list of virtual endpoint functions associated with this function * @event_ops: callbacks for capturing the EPC events * @db_msg: data for MSI from RC side * @num_db: number of doorbells
*/ struct pci_epf { struct device dev; constchar *name; struct pci_epf_header *header; struct pci_epf_bar bar[PCI_STD_NUM_BARS];
u8 msi_interrupts;
u16 msix_interrupts;
u8 func_no;
u8 vfunc_no;
struct pci_epc *epc; struct pci_epf *epf_pf; struct pci_epf_driver *driver; conststruct pci_epf_device_id *id; struct list_head list; /* mutex to protect against concurrent access of pci_epf_ops */ struct mutex lock;
/* Below members are to attach secondary EPC to an endpoint function */ struct pci_epc *sec_epc; struct list_head sec_epc_list; struct pci_epf_bar sec_epc_bar[PCI_STD_NUM_BARS];
u8 sec_epc_func_no; struct config_group *group; unsignedint is_bound; unsignedint is_vf; unsignedlong vfunction_num_map; struct list_head pci_vepf; conststruct pci_epc_event_ops *event_ops; struct pci_epf_doorbell_msg *db_msg;
u16 num_db;
};
/** * struct pci_epf_msix_tbl - represents the MSI-X table entry structure * @msg_addr: Writes to this address will trigger MSI-X interrupt in host * @msg_data: Data that should be written to @msg_addr to trigger MSI-X * interrupt * @vector_ctrl: Identifies if the function is prohibited from sending a message * using this MSI-X table entry
*/ struct pci_epf_msix_tbl {
u64 msg_addr;
u32 msg_data;
u32 vector_ctrl;
};
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