FPGA_GET_API_VERSION and FPGA_CHECK_EXTENSION ioctls are common ones which
need to be supported by all feature devices drivers including FME and AFU.
This patch implements above 2 ioctls in FPGA Accelerated Function Unit
(AFU) driver.

Signed-off-by: Tim Whisonant <tim.whison...@intel.com>
Signed-off-by: Enno Luebbers <enno.luebb...@intel.com>
Signed-off-by: Shiva Rao <shiva....@intel.com>
Signed-off-by: Christopher Rauer <christopher.ra...@intel.com>
Signed-off-by: Xiao Guangrong <guangrong.x...@linux.intel.com>
Signed-off-by: Wu Hao <hao...@intel.com>
Acked-by: Alan Tull <at...@kernel.org>
Acked-by: Moritz Fischer <m...@kernel.org>
v2: rebased
v3: rebased as driver renamed to fpga-dfl-afu
    fix one checkpatch issue
v4: add Acked-by from Alan and Moritz.
 drivers/fpga/dfl-afu-main.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/fpga/dfl-afu-main.c b/drivers/fpga/dfl-afu-main.c
index b2f8798..bead242 100644
--- a/drivers/fpga/dfl-afu-main.c
+++ b/drivers/fpga/dfl-afu-main.c
@@ -121,6 +121,13 @@ static int afu_release(struct inode *inode, struct file 
        return 0;
+static long afu_ioctl_check_extension(struct feature_platform_data *pdata,
+                                     unsigned long arg)
+       /* No extension support for now */
+       return 0;
 static long afu_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
        struct platform_device *pdev = filp->private_data;
@@ -131,6 +138,10 @@ static long afu_ioctl(struct file *filp, unsigned int cmd, 
unsigned long arg)
        dev_dbg(&pdev->dev, "%s cmd 0x%x\n", __func__, cmd);
        switch (cmd) {
+       case FPGA_GET_API_VERSION:
+               return FPGA_API_VERSION;
+               return afu_ioctl_check_extension(pdata, arg);
                 * Let sub-feature's ioctl function to handle the cmd

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