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From: Vidya Sagar <vidyas@nvidia.com>
To: <jingoohan1@gmail.com>, <gustavo.pimentel@synopsys.com>,
	<lorenzo.pieralisi@arm.com>, <andrew.murray@arm.com>,
	<bhelgaas@google.com>, <kishon@ti.com>,
	<thierry.reding@gmail.com>
Cc: <Jisheng.Zhang@synaptics.com>, <jonathanh@nvidia.com>,
	<linux-pci@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<kthota@nvidia.com>, <mmaddireddy@nvidia.com>,
	<vidyas@nvidia.com>, <sagar.tv@gmail.com>
Subject: [PATCH V3 3/5] PCI: endpoint: Add notification for core init completion
Date: Mon, 17 Feb 2020 17:40:34 +0530	[thread overview]
Message-ID: <20200217121036.3057-4-vidyas@nvidia.com> (raw)
In-Reply-To: <20200217121036.3057-1-vidyas@nvidia.com>

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

Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
---
V3:
* Added Acked-by: Kishon Vijay Abraham I <kishon@ti.com>

V2:
* None

 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 dc1c673534e0..0d22a377a0cf 100644
--- a/drivers/pci/endpoint/pci-epc-core.c
+++ b/drivers/pci/endpoint/pci-epc-core.c
@@ -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
diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h
index 9ffe6bd081ae..0d7e91bad91e 100644
--- a/include/linux/pci-epc.h
+++ b/include/linux/pci-epc.h
@@ -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);
diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h
index bcdf4f07bde7..0c628e30c582 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


  parent reply	other threads:[~2020-02-17 12:11 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-17 12:10 [PATCH V3 0/5] Add support to defer core initialization Vidya Sagar
2020-02-17 12:10 ` [PATCH V3 1/5] PCI: endpoint: Add core init notifying feature Vidya Sagar
2020-02-17 12:10 ` [PATCH V3 2/5] PCI: dwc: Refactor core initialization code for EP mode Vidya Sagar
2020-02-17 12:10 ` Vidya Sagar [this message]
2020-02-17 12:10 ` [PATCH V3 4/5] PCI: dwc: Add API to notify core initialization completion Vidya Sagar
2020-02-24 11:32   ` Lorenzo Pieralisi
2020-02-24 12:20     ` Vidya Sagar
2020-02-24 14:32       ` Lorenzo Pieralisi
2020-02-24 16:57         ` Vidya Sagar
2020-02-24 17:07           ` Lorenzo Pieralisi
2020-02-17 12:10 ` [PATCH V3 5/5] PCI: pci-epf-test: Add support to defer core initialization Vidya Sagar
2020-02-25 12:08   ` Lorenzo Pieralisi
2020-02-25 18:13     ` Vidya Sagar
2020-02-26 10:07       ` Lorenzo Pieralisi
2020-02-26 11:59         ` Vidya Sagar

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