aboutsummaryrefslogtreecommitdiff
path: root/drivers/fpga/dfl.c
diff options
context:
space:
mode:
authorXiao Guangrong <guangrong.xiao@linux.intel.com>2018-06-30 08:53:16 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-07-15 13:55:45 +0200
commit5b57d02a2f94bb04c6b36932412f7f3b1bb38518 (patch)
tree3065909e12962864351492bb6beb2b03a55cc3e2 /drivers/fpga/dfl.c
parent5d56e117001996766c3dab5767663b0c43b76639 (diff)
downloadlinux-5b57d02a2f94bb04c6b36932412f7f3b1bb38518.tar.gz
fpga: dfl: add feature device infrastructure
This patch abstracts the common operations of the sub features and defines the feature_ops data structure, including init, uinit and ioctl function pointers. And this patch adds some common helper functions for FME and AFU drivers, e.g. dfl_feature_dev_use_begin/end which are used to ensure exclusive usage of the feature device file. 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: Kang Luwei <luwei.kang@intel.com> Signed-off-by: Zhang Yi <yi.z.zhang@intel.com> Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com> Signed-off-by: Wu Hao <hao.wu@intel.com> Acked-by: Alan Tull <atull@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/fpga/dfl.c')
-rw-r--r--drivers/fpga/dfl.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c
index 68e0b45617b2..e2c72c5dd9e6 100644
--- a/drivers/fpga/dfl.c
+++ b/drivers/fpga/dfl.c
@@ -136,6 +136,77 @@ static enum dfl_id_type dfh_id_to_type(u32 id)
return DFL_ID_MAX;
}
+/**
+ * dfl_fpga_dev_feature_uinit - uinit for sub features of dfl feature device
+ * @pdev: feature device.
+ */
+void dfl_fpga_dev_feature_uinit(struct platform_device *pdev)
+{
+ struct dfl_feature_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct dfl_feature *feature;
+
+ dfl_fpga_dev_for_each_feature(pdata, feature)
+ if (feature->ops) {
+ feature->ops->uinit(pdev, feature);
+ feature->ops = NULL;
+ }
+}
+EXPORT_SYMBOL_GPL(dfl_fpga_dev_feature_uinit);
+
+static int dfl_feature_instance_init(struct platform_device *pdev,
+ struct dfl_feature_platform_data *pdata,
+ struct dfl_feature *feature,
+ struct dfl_feature_driver *drv)
+{
+ int ret;
+
+ ret = drv->ops->init(pdev, feature);
+ if (ret)
+ return ret;
+
+ feature->ops = drv->ops;
+
+ return ret;
+}
+
+/**
+ * dfl_fpga_dev_feature_init - init for sub features of dfl feature device
+ * @pdev: feature device.
+ * @feature_drvs: drvs for sub features.
+ *
+ * This function will match sub features with given feature drvs list and
+ * use matched drv to init related sub feature.
+ *
+ * Return: 0 on success, negative error code otherwise.
+ */
+int dfl_fpga_dev_feature_init(struct platform_device *pdev,
+ struct dfl_feature_driver *feature_drvs)
+{
+ struct dfl_feature_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct dfl_feature_driver *drv = feature_drvs;
+ struct dfl_feature *feature;
+ int ret;
+
+ while (drv->ops) {
+ dfl_fpga_dev_for_each_feature(pdata, feature) {
+ /* match feature and drv using id */
+ if (feature->id == drv->id) {
+ ret = dfl_feature_instance_init(pdev, pdata,
+ feature, drv);
+ if (ret)
+ goto exit;
+ }
+ }
+ drv++;
+ }
+
+ return 0;
+exit:
+ dfl_fpga_dev_feature_uinit(pdev);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(dfl_fpga_dev_feature_init);
+
static void dfl_chardev_uinit(void)
{
int i;