[PATCH v3 06/21] fpga: dfl: adds fpga_cdev_find_port
From: Wu Hao <hidden>
Date: 2017-11-27 06:56:43
Also in:
linux-fpga, lkml
Subsystem:
fpga manager framework, the rest · Maintainers:
Moritz Fischer, Xu Yilun, Linus Torvalds
For feature devices, e.g FPGA Management Engine (FME), it may
require fpga_cdev_find_port function to find dedicate port for
further actions, so export this function from feature device
driver module.
Signed-off-by: Tim Whisonant <redacted>
Signed-off-by: Enno Luebbers <redacted>
Signed-off-by: Shiva Rao <redacted>
Signed-off-by: Christopher Rauer <redacted>
Signed-off-by: Xiao Guangrong <redacted>
Signed-off-by: Wu Hao <redacted>
----
v3: s/fpga_for_each_port/fpga_cdev_find_port/
move fpga_cdev_find_port to fpga-dfl module.
---
drivers/fpga/fpga-dfl.c | 27 +++++++++++++++++++++++++++
drivers/fpga/fpga-dfl.h | 16 ++++++++++++++++
2 files changed, 43 insertions(+)
diff --git a/drivers/fpga/fpga-dfl.c b/drivers/fpga/fpga-dfl.c
index 9294c0a..ce03b17 100644
--- a/drivers/fpga/fpga-dfl.c
+++ b/drivers/fpga/fpga-dfl.c@@ -873,6 +873,33 @@ void fpga_remove_feature_devs(struct fpga_cdev *cdev) } EXPORT_SYMBOL_GPL(fpga_remove_feature_devs); +/** + * __fpga_cdev_find_port - find a port under given container device + * @cdev: container device + * @data: data passed to match function + * @match: match function used to find specific port from the port device list + * + * Find a port device under container device. This function needs to be + * invoked with lock held. + */ +struct platform_device * +__fpga_cdev_find_port(struct fpga_cdev *cdev, void *data, + int (*match)(struct platform_device *, void *)) +{ + struct feature_platform_data *pdata; + struct platform_device *port_dev; + + list_for_each_entry(pdata, &cdev->port_dev_list, node) { + port_dev = pdata->dev; + + if (match(port_dev, data) && get_device(&port_dev->dev)) + return port_dev; + } + + return NULL; +} +EXPORT_SYMBOL_GPL(__fpga_cdev_find_port); + int fpga_port_id(struct platform_device *pdev) { void __iomem *base;
diff --git a/drivers/fpga/fpga-dfl.h b/drivers/fpga/fpga-dfl.h
index e569a13..36e2394 100644
--- a/drivers/fpga/fpga-dfl.h
+++ b/drivers/fpga/fpga-dfl.h@@ -375,4 +375,20 @@ struct fpga_cdev { struct fpga_cdev *fpga_enumerate_feature_devs(struct fpga_enum_info *info); void fpga_remove_feature_devs(struct fpga_cdev *cdev); +struct platform_device * +__fpga_cdev_find_port(struct fpga_cdev *cdev, void *data, + int (*match)(struct platform_device *, void *)); + +static inline struct platform_device * +fpga_cdev_find_port(struct fpga_cdev *cdev, void *data, + int (*match)(struct platform_device *, void *)) +{ + struct platform_device *pdev; + + mutex_lock(&cdev->lock); + pdev = __fpga_cdev_find_port(cdev, data, match); + mutex_unlock(&cdev->lock); + + return pdev; +} #endif /* __DFL_FPGA_H */
--
1.8.3.1