diff options
Diffstat (limited to 'include/linux/pci-epf.h')
| -rw-r--r-- | include/linux/pci-epf.h | 85 |
1 files changed, 63 insertions, 22 deletions
diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h index 009a07147c61..48f68c4dcfa5 100644 --- a/include/linux/pci-epf.h +++ b/include/linux/pci-epf.h @@ -12,16 +12,13 @@ #include <linux/configfs.h> #include <linux/device.h> #include <linux/mod_devicetable.h> +#include <linux/msi.h> #include <linux/pci.h> struct pci_epf; +struct pci_epc_features; enum pci_epc_interface_type; -enum pci_notify_event { - CORE_INIT, - LINK_UP, -}; - enum pci_barno { NO_BAR = -1, BAR_0, @@ -42,7 +39,7 @@ enum pci_barno { * @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 + * @subsys_id: ID specific to vendor * @interrupt_pin: interrupt pin the device (or device function) uses */ struct pci_epf_header { @@ -63,7 +60,7 @@ struct pci_epf_header { * @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 + * @add_cfs: ops to initialize function-specific configfs attributes */ struct pci_epf_ops { int (*bind)(struct pci_epf *epf); @@ -73,6 +70,22 @@ struct pci_epf_ops { }; /** + * 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 @@ -84,24 +97,26 @@ struct pci_epf_ops { * @id_table: identifies EPF devices for probing */ struct pci_epf_driver { - int (*probe)(struct pci_epf *epf); + int (*probe)(struct pci_epf *epf, + const struct pci_epf_device_id *id); void (*remove)(struct pci_epf *epf); struct device_driver driver; - struct pci_epf_ops *ops; + const 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)) +#define to_pci_epf_driver(drv) container_of_const((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 * @addr: virtual address corresponding to the @phys_addr * @size: the size of the address space present in BAR + * @mem_size: the size actually allocated to accommodate the iATU alignment + * requirement * @barno: BAR number * @flags: flags that are set for the BAR */ @@ -109,11 +124,22 @@ struct pci_epf_bar { dma_addr_t phys_addr; void *addr; size_t size; + size_t mem_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 @@ -126,8 +152,8 @@ struct pci_epf_bar { * @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 - * @nb: notifier block to notify EPF of any EPC events (like linkup) * @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 @@ -139,12 +165,15 @@ struct pci_epf_bar { * @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; const char *name; struct pci_epf_header *header; - struct pci_epf_bar bar[6]; + struct pci_epf_bar bar[PCI_STD_NUM_BARS]; u8 msi_interrupts; u16 msix_interrupts; u8 func_no; @@ -153,29 +182,33 @@ struct pci_epf { struct pci_epc *epc; struct pci_epf *epf_pf; struct pci_epf_driver *driver; + const struct pci_epf_device_id *id; struct list_head list; - struct notifier_block nb; /* 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[6]; + struct pci_epf_bar sec_epc_bar[PCI_STD_NUM_BARS]; u8 sec_epc_func_no; struct config_group *group; unsigned int is_bound; unsigned int is_vf; unsigned long vfunction_num_map; struct list_head pci_vepf; + const struct pci_epc_event_ops *event_ops; + struct pci_epf_doorbell_msg *db_msg; + u16 num_db; }; /** - * struct pci_epf_msix_tbl - represents the MSIX table entry structure - * @msg_addr: Writes to this address will trigger MSIX interrupt in host - * @msg_data: Data that should be written to @msg_addr to trigger MSIX interrupt + * 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 MSIX table entry + * using this MSI-X table entry */ struct pci_epf_msix_tbl { u64 msg_addr; @@ -204,13 +237,21 @@ 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, enum pci_epc_interface_type type); + const struct pci_epc_features *epc_features, + enum pci_epc_interface_type type); void pci_epf_free_space(struct pci_epf *epf, void *addr, enum pci_barno bar, enum pci_epc_interface_type type); + +int pci_epf_assign_bar_space(struct pci_epf *epf, size_t size, + enum pci_barno bar, + const struct pci_epc_features *epc_features, + enum pci_epc_interface_type type, + dma_addr_t bar_addr); + +int pci_epf_align_inbound_addr(struct pci_epf *epf, enum pci_barno bar, + u64 addr, dma_addr_t *base, size_t *off); int pci_epf_bind(struct pci_epf *epf); void pci_epf_unbind(struct pci_epf *epf); -struct config_group *pci_epf_type_add_cfs(struct pci_epf *epf, - struct config_group *group); int pci_epf_add_vepf(struct pci_epf *epf_pf, struct pci_epf *epf_vf); void pci_epf_remove_vepf(struct pci_epf *epf_pf, struct pci_epf *epf_vf); #endif /* __LINUX_PCI_EPF_H */ |