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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/include/linux/pci-epf.h
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@@ -15,7 +15,13 @@
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 struct pci_epf;
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+enum pci_notify_event {
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+	CORE_INIT,
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+	LINK_UP,
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+};
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+
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 enum pci_barno {
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+	NO_BAR = -1,
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 	BAR_0,
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 	BAR_1,
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 	BAR_2,
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@@ -55,13 +61,10 @@
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  * @bind: ops to perform when a EPC device has been bound to EPF device
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  * @unbind: ops to perform when a binding has been lost between a EPC device
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  *	    and EPF device
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- * @linkup: ops to perform when the EPC device has established a connection with
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- *	    a host system
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  */
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 struct pci_epf_ops {
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 	int	(*bind)(struct pci_epf *epf);
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 	void	(*unbind)(struct pci_epf *epf);
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-	void	(*linkup)(struct pci_epf *epf);
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 };
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 /**
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@@ -92,10 +95,12 @@
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 /**
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  * struct pci_epf_bar - represents the BAR of EPF device
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  * @phys_addr: physical address that should be mapped to the BAR
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+ * @addr: virtual address corresponding to the @phys_addr
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  * @size: the size of the address space present in BAR
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  */
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 struct pci_epf_bar {
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 	dma_addr_t	phys_addr;
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+	void		*addr;
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 	size_t		size;
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 	enum pci_barno	barno;
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 	int		flags;
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@@ -112,6 +117,8 @@
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  * @epc: the EPC device to which this EPF device is bound
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  * @driver: the EPF driver to which this EPF device is bound
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  * @list: to add pci_epf as a list of PCI endpoint functions to pci_epc
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+ * @nb: notifier block to notify EPF of any EPC events (like linkup)
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+ * @lock: mutex to protect pci_epf_ops
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  */
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 struct pci_epf {
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 	struct device		dev;
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@@ -125,6 +132,22 @@
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 	struct pci_epc		*epc;
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 	struct pci_epf_driver	*driver;
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 	struct list_head	list;
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+	struct notifier_block   nb;
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+	/* mutex to protect against concurrent access of pci_epf_ops */
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+	struct mutex		lock;
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+};
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+
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+/**
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+ * struct pci_epf_msix_tbl - represents the MSIX table entry structure
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+ * @msg_addr: Writes to this address will trigger MSIX interrupt in host
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+ * @msg_data: Data that should be written to @msg_addr to trigger MSIX interrupt
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+ * @vector_ctrl: Identifies if the function is prohibited from sending a message
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+ * using this MSIX table entry
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+ */
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+struct pci_epf_msix_tbl {
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+	u64 msg_addr;
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+	u32 msg_data;
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+	u32 vector_ctrl;
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 };
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 #define to_pci_epf(epf_dev) container_of((epf_dev), struct pci_epf, dev)
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@@ -149,9 +172,9 @@
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 int __pci_epf_register_driver(struct pci_epf_driver *driver,
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 			      struct module *owner);
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 void pci_epf_unregister_driver(struct pci_epf_driver *driver);
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-void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar);
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+void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar,
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+			  size_t align);
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 void pci_epf_free_space(struct pci_epf *epf, void *addr, enum pci_barno bar);
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 int pci_epf_bind(struct pci_epf *epf);
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 void pci_epf_unbind(struct pci_epf *epf);
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-void pci_epf_linkup(struct pci_epf *epf);
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 #endif /* __LINUX_PCI_EPF_H */