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From: Kishon Vijay Abraham I <kishon@ti.com>
To: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Arnd Bergmann <arnd@arndb.de>, Jon Mason <jdmason@kudzu.us>,
	Dave Jiang <dave.jiang@intel.com>,
	Allen Hubbe <allenbh@gmail.com>, Tom Joseph <tjoseph@cadence.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Rob Herring <robh+dt@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Jonathan Corbet <corbet@lwn.net>, <linux-pci@vger.kernel.org>,
	<linux-doc@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<devicetree@vger.kernel.org>, <linux-ntb@googlegroups.com>,
	Kishon Vijay Abraham I <kishon@ti.com>
Subject: [PATCH 05/19] PCI: endpoint: Add "pci-epf-bus" driver
Date: Thu, 14 May 2020 20:29:13 +0530	[thread overview]
Message-ID: <20200514145927.17555-6-kishon@ti.com> (raw)
In-Reply-To: <20200514145927.17555-1-kishon@ti.com>

Add "pci-epf-bus" driver that helps to create EPF device from
device tree. This is added in order to define an endpoint function
device completely from device tree.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
 drivers/pci/endpoint/Makefile      |  3 +-
 drivers/pci/endpoint/pci-epf-bus.c | 54 ++++++++++++++++++++++++++++++
 2 files changed, 56 insertions(+), 1 deletion(-)
 create mode 100644 drivers/pci/endpoint/pci-epf-bus.c

diff --git a/drivers/pci/endpoint/Makefile b/drivers/pci/endpoint/Makefile
index 95b2fe47e3b0..36cf33cf975c 100644
--- a/drivers/pci/endpoint/Makefile
+++ b/drivers/pci/endpoint/Makefile
@@ -5,4 +5,5 @@
 
 obj-$(CONFIG_PCI_ENDPOINT_CONFIGFS)	+= pci-ep-cfs.o
 obj-$(CONFIG_PCI_ENDPOINT)		+= pci-epc-core.o pci-epf-core.o\
-					   pci-epc-mem.o functions/
+					   pci-epc-mem.o pci-epf-bus.o \
+					   functions/
diff --git a/drivers/pci/endpoint/pci-epf-bus.c b/drivers/pci/endpoint/pci-epf-bus.c
new file mode 100644
index 000000000000..b6ab1479b79e
--- /dev/null
+++ b/drivers/pci/endpoint/pci-epf-bus.c
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * PCI Endpoint *Function* Bus Driver
+ *
+ * Copyright (C) 2020 Texas Instruments
+ * Author: Kishon Vijay Abraham I <kishon@ti.com>
+ */
+
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/pci-epf.h>
+#include <linux/platform_device.h>
+
+static int pci_epf_bus_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *node = of_node_get(dev->of_node);
+	struct device_node *child;
+	struct pci_epf *epf;
+
+	for_each_child_of_node(node, child) {
+		epf = devm_pci_epf_of_create(dev, child);
+		if (IS_ERR(epf)) {
+			dev_err(dev, "Failed to create PCI EPF device %s\n",
+				node->full_name);
+			of_node_put(child);
+			break;
+		}
+	}
+	of_node_put(node);
+
+	return 0;
+}
+
+static const struct of_device_id pci_epf_bus_id_table[] = {
+	{ .compatible = "pci-epf-bus" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, pci_epf_bus_id_table);
+
+static struct platform_driver pci_epf_bus_driver = {
+	.probe		= pci_epf_bus_probe,
+	.driver		= {
+		.name	= "pci-epf-bus",
+		.of_match_table = of_match_ptr(pci_epf_bus_id_table),
+	},
+};
+
+module_platform_driver(pci_epf_bus_driver);
+
+MODULE_AUTHOR("Texas Instruments Inc.");
+MODULE_DESCRIPTION("PCI EPF Bus Driver");
+MODULE_LICENSE("GPL v2");
-- 
2.17.1


  parent reply	other threads:[~2020-05-14 15:00 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-14 14:59 [PATCH 00/19] Implement NTB Controller using multiple PCI EP Kishon Vijay Abraham I
2020-05-14 14:59 ` [PATCH 01/19] dt-bindings: PCI: Endpoint: Add DT bindings for PCI EPF NTB Device Kishon Vijay Abraham I
2020-05-15  2:38   ` Rob Herring
2020-05-22  5:53   ` Kishon Vijay Abraham I
2020-05-14 14:59 ` [PATCH 02/19] Documentation: PCI: Add specification for the *PCI NTB* function device Kishon Vijay Abraham I
2020-05-14 14:59 ` [PATCH 03/19] PCI: endpoint: Add API to get reference to EPC from device-tree Kishon Vijay Abraham I
2020-05-14 14:59 ` [PATCH 04/19] PCI: endpoint: Add API to create EPF device from device tree Kishon Vijay Abraham I
2020-05-14 14:59 ` Kishon Vijay Abraham I [this message]
2020-05-14 14:59 ` [PATCH 06/19] PCI: endpoint: Make *_get_first_free_bar() take into account 64 bit BAR Kishon Vijay Abraham I
2020-05-14 14:59 ` [PATCH 07/19] PCI: endpoint: Add helper API to get the 'next' unreserved BAR Kishon Vijay Abraham I
2020-05-14 14:59 ` [PATCH 08/19] PCI: endpoint: Make *_free_bar() to return error codes on failure Kishon Vijay Abraham I
2020-05-14 14:59 ` [PATCH 09/19] PCI: endpoint: Remove unused pci_epf_match_device() Kishon Vijay Abraham I
2020-05-14 14:59 ` [PATCH 10/19] PCI: endpoint: Make pci_epf_driver ops optional Kishon Vijay Abraham I
2020-05-14 14:59 ` [PATCH 11/19] PCI: endpoint: Add helper API to populate header with values from DT Kishon Vijay Abraham I
2020-05-14 14:59 ` [PATCH 12/19] PCI: endpoint: Add support to associate secondary EPC with EPF Kishon Vijay Abraham I
2020-05-14 14:59 ` [PATCH 13/19] PCI: endpoint: Add pci_epc_ops to map MSI irq Kishon Vijay Abraham I
2020-05-14 14:59 ` [PATCH 14/19] PCI: cadence: Implement ->msi_map_irq() ops Kishon Vijay Abraham I
2020-05-14 14:59 ` [PATCH 15/19] PCI: endpoint: Add EP function driver to provide NTB functionality Kishon Vijay Abraham I
2020-05-14 14:59 ` [PATCH 16/19] PCI: Add TI J721E device to pci ids Kishon Vijay Abraham I
2020-05-14 14:59 ` [PATCH 17/19] NTB: Add support for EPF PCI-Express Non-Transparent Bridge Kishon Vijay Abraham I
2020-05-14 14:59 ` [PATCH 18/19] NTB: tool: Enable the NTB/PCIe link on the local or remote side of bridge Kishon Vijay Abraham I
2020-05-14 14:59 ` [PATCH 19/19] NTB: ntb_perf/ntb_tool: Use PCI device for dma_alloc_coherent() Kishon Vijay Abraham I
2020-05-22 16:11 ` [PATCH 00/19] Implement NTB Controller using multiple PCI EP Rob Herring
2020-05-23  1:47   ` Kishon Vijay Abraham I

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