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PCI: endpoint: Add notification for core init completion 

Add support to send notifications to EPF from EPC once the core
registers initialization is complete.

Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Vidya Sagar 2020-02-17 17:40:34 +05:30 committed by Lorenzo Pieralisi
parent e966f7390d
commit 0ef22dcf0c
3 changed files with 24 additions and 1 deletions
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19
drivers/pci/endpoint/pci-epc-core.c
View File

@ -540,10 +540,27 @@ void pci_epc_linkup(struct pci_epc *epc)
if (!epc || IS_ERR(epc))
return;
atomic_notifier_call_chain(&epc->notifier, 0, NULL);
atomic_notifier_call_chain(&epc->notifier, LINK_UP, NULL);
}
EXPORT_SYMBOL_GPL(pci_epc_linkup);
/**
* pci_epc_init_notify() - Notify the EPF device that EPC device's core
* initialization is completed.
* @epc: the EPC device whose core initialization is completeds
*
* Invoke to Notify the EPF device that the EPC device's initialization
* is completed.
*/
void pci_epc_init_notify(struct pci_epc *epc)
{
if (!epc || IS_ERR(epc))
return;
atomic_notifier_call_chain(&epc->notifier, CORE_INIT, NULL);
}
EXPORT_SYMBOL_GPL(pci_epc_init_notify);
/**
* pci_epc_destroy() - destroy the EPC device
* @epc: the EPC device that has to be destroyed

1
include/linux/pci-epc.h
View File

@ -165,6 +165,7 @@ 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);
void pci_epc_linkup(struct pci_epc *epc);
void pci_epc_init_notify(struct pci_epc *epc);
void pci_epc_remove_epf(struct pci_epc *epc, struct pci_epf *epf);
int pci_epc_write_header(struct pci_epc *epc, u8 func_no,
struct pci_epf_header *hdr);

5
include/linux/pci-epf.h
View File

@ -15,6 +15,11 @@
struct pci_epf;
enum pci_notify_event {
CORE_INIT,
LINK_UP,
};
enum pci_barno {
BAR_0,
BAR_1,