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Subject[PATCH v3 16/21] fpga: dfl: add fpga region platform driver for FME
Date
This patch adds fpga region platform driver for FPGA Management Engine.
It register an fpga region with given fpga manager / bridge device.

Signed-off-by: Tim Whisonant <tim.whisonant@intel.com>
Signed-off-by: Enno Luebbers <enno.luebbers@intel.com>
Signed-off-by: Shiva Rao <shiva.rao@intel.com>
Signed-off-by: Christopher Rauer <christopher.rauer@intel.com>
Signed-off-by: Wu Hao <hao.wu@intel.com>
----
v3: rename driver to fpga-dfl-fme-region
fix fpga_mgr_put order problem in remove function.
rebased due to fpga api changes.
---
drivers/fpga/Kconfig | 6 +++
drivers/fpga/Makefile | 1 +
drivers/fpga/fpga-dfl-fme-region.c | 92 ++++++++++++++++++++++++++++++++++++++
3 files changed, 99 insertions(+)
create mode 100644 drivers/fpga/fpga-dfl-fme-region.c

diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
index 3804064..2df9dfd 100644
--- a/drivers/fpga/Kconfig
+++ b/drivers/fpga/Kconfig
@@ -162,6 +162,12 @@ config FPGA_DFL_FME_BRIDGE
help
Say Y to enable FPGA Bridge driver for FPGA Management Engine.

+config FPGA_DFL_FME_REGION
+ tristate "FPGA DFL FME Region Driver"
+ depends on FPGA_DFL_FME
+ help
+ Say Y to enable FPGA Region driver for FPGA Management Engine.
+
config INTEL_FPGA_DFL_PCI
tristate "Intel FPGA DFL PCIe Device Driver"
depends on PCI && FPGA_DFL
diff --git a/drivers/fpga/Makefile b/drivers/fpga/Makefile
index 3c8c4c7..11777d3 100644
--- a/drivers/fpga/Makefile
+++ b/drivers/fpga/Makefile
@@ -33,6 +33,7 @@ obj-$(CONFIG_FPGA_DFL) += fpga-dfl.o
obj-$(CONFIG_FPGA_DFL_FME) += fpga-dfl-fme.o
obj-$(CONFIG_FPGA_DFL_FME_MGR) += fpga-dfl-fme-mgr.o
obj-$(CONFIG_FPGA_DFL_FME_BRIDGE) += fpga-dfl-fme-br.o
+obj-$(CONFIG_FPGA_DFL_FME_REGION) += fpga-dfl-fme-region.o

fpga-dfl-fme-objs := dfl-fme-main.o dfl-fme-pr.o

diff --git a/drivers/fpga/fpga-dfl-fme-region.c b/drivers/fpga/fpga-dfl-fme-region.c
new file mode 100644
index 0000000..0b988ab
--- /dev/null
+++ b/drivers/fpga/fpga-dfl-fme-region.c
@@ -0,0 +1,92 @@
+/*
+ * FPGA Region Driver for FPGA Management Engine (FME)
+ *
+ * Copyright (C) 2017 Intel Corporation, Inc.
+ *
+ * Authors:
+ * Wu Hao <hao.wu@intel.com>
+ * Joseph Grecco <joe.grecco@intel.com>
+ * Enno Luebbers <enno.luebbers@intel.com>
+ * Tim Whisonant <tim.whisonant@intel.com>
+ * Ananda Ravuri <ananda.ravuri@intel.com>
+ * Henry Mitchel <henry.mitchel@intel.com>
+ *
+ * This work is licensed under the terms of the GNU GPL version 2.
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <linux/module.h>
+#include <linux/fpga/fpga-region.h>
+
+#include "fpga-dfl.h"
+#include "dfl-fme.h"
+
+static int fme_region_get_bridges(struct fpga_region *region)
+{
+ struct fme_region_pdata *pdata = region->priv;
+ struct device *dev = &pdata->br->dev;
+
+ return fpga_bridge_get_to_list(dev, region->info, &region->bridge_list);
+}
+
+static int fme_region_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct fme_region_pdata *pdata = dev_get_platdata(dev);
+ struct fpga_region *region;
+ struct fpga_manager *mgr;
+ int ret;
+
+ mgr = fpga_mgr_get(&pdata->mgr->dev);
+ if (IS_ERR(mgr))
+ return -EPROBE_DEFER;
+
+ region = devm_kzalloc(dev, sizeof(*region), GFP_KERNEL);
+ if (!region) {
+ ret = -ENOMEM;
+ goto eprobe_mgr_put;
+ }
+
+ region->mgr = mgr;
+ region->get_bridges = fme_region_get_bridges;
+ region->priv = pdata;
+ region->parent = dev;
+ platform_set_drvdata(pdev, region);
+
+ ret = fpga_region_register(region);
+ if (ret)
+ goto eprobe_mgr_put;
+
+ dev_dbg(dev, "DFL FME FPGA Region probed\n");
+
+ return 0;
+
+eprobe_mgr_put:
+ fpga_mgr_put(mgr);
+ return ret;
+}
+
+static int fme_region_remove(struct platform_device *pdev)
+{
+ struct fpga_region *region = dev_get_drvdata(&pdev->dev);
+
+ fpga_region_unregister(region);
+ fpga_mgr_put(region->mgr);
+
+ return 0;
+}
+
+static struct platform_driver fme_region_driver = {
+ .driver = {
+ .name = FPGA_DFL_FME_REGION,
+ },
+ .probe = fme_region_probe,
+ .remove = fme_region_remove,
+};
+
+module_platform_driver(fme_region_driver);
+
+MODULE_DESCRIPTION("FPGA Region for FPGA Management Engine");
+MODULE_AUTHOR("Intel Corporation");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:fpga-dfl-fme-region");
--
1.8.3.1
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