The header register set is always present for the Port/AFU, it is mainly
for capability, control and status of the ports that AFU connected to.
This patch implements header sub feature support. Below user interfaces
are created by this patch.
Sysfs interface:
* /sys/class/fpga/<fpga.x>/<intel-fpga-port.x>/id
Read-only. Port ID.
Ioctl interface:
* FPGA_PORT_RESET
Reset the FPGA AFU Port.
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>
---
drivers/fpga/intel/afu-main.c | 44 ++++++++++++++++++++++++++++++++++++++++-
include/uapi/linux/intel-fpga.h | 14 +++++++++++++
2 files changed, 57 insertions(+), 1 deletion(-)
diff --git a/drivers/fpga/intel/afu-main.c b/drivers/fpga/intel/afu-main.c
index 1c2035b..7166d5c 100644
--- a/drivers/fpga/intel/afu-main.c
+++ b/drivers/fpga/intel/afu-main.c
@@ -20,25 +20,66 @@
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/intel-fpga.h>
#include "feature-dev.h"
+static ssize_t
+id_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ int id = fpga_port_id(to_platform_device(dev));
+
+ return scnprintf(buf, PAGE_SIZE, "%d\n", id);
+}
+static DEVICE_ATTR_RO(id);
+
+static const struct attribute *port_hdr_attrs[] = {
+ &dev_attr_id.attr,
+ NULL,
+};
+
static int port_hdr_init(struct platform_device *pdev, struct feature *feature)
{
dev_dbg(&pdev->dev, "PORT HDR Init.\n");
- return 0;
+ fpga_port_reset(pdev);
+
+ return sysfs_create_files(&pdev->dev.kobj, port_hdr_attrs);
}
static void port_hdr_uinit(struct platform_device *pdev,
struct feature *feature)
{
dev_dbg(&pdev->dev, "PORT HDR UInit.\n");
+
+ sysfs_remove_files(&pdev->dev.kobj, port_hdr_attrs);
+}
+
+static long
+port_hdr_ioctl(struct platform_device *pdev, struct feature *feature,
+ unsigned int cmd, unsigned long arg)
+{
+ long ret;
+
+ switch (cmd) {
+ case FPGA_PORT_RESET:
+ if (!arg)
+ ret = fpga_port_reset(pdev);
+ else
+ ret = -EINVAL;
+ break;
+ default:
+ dev_dbg(&pdev->dev, "%x cmd not handled", cmd);
+ ret = -ENODEV;
+ }
+
+ return ret;
}
struct feature_ops port_hdr_ops = {
.init = port_hdr_init,
.uinit = port_hdr_uinit,
+ .ioctl = port_hdr_ioctl,
};
static struct feature_driver port_feature_drvs[] = {
@@ -78,6 +119,7 @@ static int afu_release(struct inode *inode, struct file
*filp)
dev_dbg(&pdev->dev, "Device File Release\n");
+ fpga_port_reset(pdev);
feature_dev_use_end(pdata);
return 0;
}
diff --git a/include/uapi/linux/intel-fpga.h b/include/uapi/linux/intel-fpga.h
index 77658316..13b2e61 100644
--- a/include/uapi/linux/intel-fpga.h
+++ b/include/uapi/linux/intel-fpga.h
@@ -32,8 +32,11 @@
#define FPGA_MAGIC 0xB6
#define FPGA_BASE 0
+#define PORT_BASE 0x40
#define FME_BASE 0x80
+/* Common IOCTLs for both FME and AFU file descriptor */
+
/**
* FPGA_GET_API_VERSION - _IO(FPGA_MAGIC, FPGA_BASE + 0)
*
@@ -52,6 +55,17 @@
#define FPGA_CHECK_EXTENSION _IO(FPGA_MAGIC, FPGA_BASE + 1)
+/* IOCTLs for AFU file descriptor */
+
+/**
+ * FPGA_PORT_RESET - _IO(FPGA_MAGIC, PORT_BASE + 0)
+ *
+ * Reset the FPGA AFU Port. No parameters are supported.
+ * Return: 0 on success, -errno of failure
+ */
+
+#define FPGA_PORT_RESET _IO(FPGA_MAGIC, PORT_BASE + 0)
+
/* IOCTLs for FME file descriptor */
/**
--
2.7.4
