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Subject[PATCH 2/4] PCI: endpoint: Add notification for core init completion
Date
Add support to send notifications to EPF from EPC once the core
registers initialization is complete.

Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
---
drivers/pci/endpoint/pci-epc-core.c | 19 ++++++++++++++++++-
include/linux/pci-epc.h | 1 +
include/linux/pci-epf.h | 5 +++++
3 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c
index 2f6436599fcb..fcc3f7fb19c0 100644
--- a/drivers/pci/endpoint/pci-epc-core.c
+++ b/drivers/pci/endpoint/pci-epc-core.c
@@ -542,10 +542,27 @@ 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
diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h
index 241e6a6f39fb..c670543e42f9 100644
--- a/include/linux/pci-epc.h
+++ b/include/linux/pci-epc.h
@@ -160,6 +160,7 @@ 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);
diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h
index 4993f7f6439b..3cb65ac1648c 100644
--- a/include/linux/pci-epf.h
+++ b/include/linux/pci-epf.h
@@ -15,6 +15,11 @@

struct pci_epf;

+enum pci_notify_event {
+ CORE_INIT,
+ LINK_UP,
+};
+
enum pci_barno {
BAR_0,
BAR_1,
--
2.17.1
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