This patch adds status to fpga-manager data structure, to allow
driver to store full/partial reconfiguration errors and other
status information.
one sysfs interface created for user space application to read
fpga-manager status.
Signed-off-by: Wu Hao <hao.wu@xxxxxxxxx>
---
Documentation/ABI/testing/sysfs-class-fpga-manager | 10 +++++++++
drivers/fpga/fpga-mgr.c | 24 ++++++++++++++++++++++
include/linux/fpga/fpga-mgr.h | 9 ++++++++
3 files changed, 43 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-class-fpga-manager b/Documentation/ABI/testing/sysfs-class-fpga-manager
index 23056c5..71b083e 100644
--- a/Documentation/ABI/testing/sysfs-class-fpga-manager
+++ b/Documentation/ABI/testing/sysfs-class-fpga-manager
@@ -35,3 +35,13 @@ Description: Read fpga manager state as a string.
* write complete = Doing post programming steps
* write complete error = Error while doing post programming
* operating = FPGA is programmed and operating
+
+What: /sys/class/fpga_manager/<fpga>/status
+Date: June 2017
+KernelVersion: 4.12
+Contact: Wu Hao <hao.wu@xxxxxxxxx>
+Description: Read fpga manager status as a string.
+ If FPGA programming operation fails, it could be due to crc
+ error or incompatible bitstream image. The intent of this
+ interface is to provide more detailed information for FPGA
+ programming errors to userspace.
diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c
index be13cce..2485658 100644
--- a/drivers/fpga/fpga-mgr.c
+++ b/drivers/fpga/fpga-mgr.c
@@ -388,12 +388,36 @@ static ssize_t state_show(struct device *dev,
return sprintf(buf, "%s\n", state_str[mgr->state]);
}
+static ssize_t status_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fpga_manager *mgr = to_fpga_manager(dev);
+ int len = 0;
+
+ if (mgr->status & FPGA_MGR_STATUS_OPERATION_ERR)
+ len += sprintf(buf + len, "reconfig operation error\n");
+ if (mgr->status & FPGA_MGR_STATUS_CRC_ERR)
+ len += sprintf(buf + len, "reconfig crc error\n");
+ if (mgr->status & FPGA_MGR_STATUS_INCOMPATIBLE_BS_ERR)
+ len += sprintf(buf + len, "reconfig incompatible BS error\n");
+ if (mgr->status & FPGA_MGR_STATUS_IP_PROTOCOL_ERR)
+ len += sprintf(buf + len, "reconfig IP protocol error\n");
+ if (mgr->status & FPGA_MGR_STATUS_FIFO_OVERFLOW_ERR)
+ len += sprintf(buf + len, "reconfig fifo overflow error\n");
+ if (mgr->status & FPGA_MGR_STATUS_SECURE_LOAD_ERR)
+ len += sprintf(buf + len, "reconfig secure load error\n");
+
+ return len;
+}
+
static DEVICE_ATTR_RO(name);
static DEVICE_ATTR_RO(state);
+static DEVICE_ATTR_RO(status);
static struct attribute *fpga_mgr_attrs[] = {
&dev_attr_name.attr,
&dev_attr_state.attr,
+ &dev_attr_status.attr,
NULL,
};
ATTRIBUTE_GROUPS(fpga_mgr);
diff --git a/include/linux/fpga/fpga-mgr.h b/include/linux/fpga/fpga-mgr.h
index b222a57..8cb42ac 100644
--- a/include/linux/fpga/fpga-mgr.h
+++ b/include/linux/fpga/fpga-mgr.h
@@ -128,6 +128,14 @@ struct fpga_manager_ops {
void (*fpga_remove)(struct fpga_manager *mgr);
};
+/* FPGA manager status: Partial/Full Reconfiguration errors */
+#define FPGA_MGR_STATUS_OPERATION_ERR BIT(0)
+#define FPGA_MGR_STATUS_CRC_ERR BIT(1)
+#define FPGA_MGR_STATUS_INCOMPATIBLE_BS_ERR BIT(2)
+#define FPGA_MGR_STATUS_IP_PROTOCOL_ERR BIT(3)
+#define FPGA_MGR_STATUS_FIFO_OVERFLOW_ERR BIT(4)
+#define FPGA_MGR_STATUS_SECURE_LOAD_ERR BIT(5)
+
/**
* struct fpga_manager - fpga manager structure
* @name: name of low level fpga manager
@@ -142,6 +150,7 @@ struct fpga_manager {
struct device dev;
struct mutex ref_mutex;
enum fpga_mgr_states state;
+ u64 status;
const struct fpga_manager_ops *mops;
void *priv;
};
--
1.8.3.1
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