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fpga: mgr: add status for fpga-manager

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This patch adds status sysfs interface for fpga manager, it's a
read only interface which allows user to get fpga manager status,
including full/partial reconfiguration error and other status
information. It adds a status callback to fpga_manager_ops too,
allows each fpga_manager driver to define its own method to
collect latest status from hardware.

The following sysfs file is created:
* /sys/class/fpga_manager/<fpga>/status
  Return status of fpga manager, including reconfiguration errors.

Signed-off-by: Wu Hao <[email protected]>
Acked-by: Alan Tull <[email protected]>
Acked-by: Moritz Fischer <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Wu Hao 2018-06-30 08:53:10 +08:00 • committed by Greg Kroah-Hartman
commit ecb5fbe299
3 changed files with 61 additions and 0 deletions
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28
drivers/fpga/fpga-mgr.c
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@ -406,12 +406,40 @@ 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);
u64 status;
int len = 0;
if (!mgr->mops->status)
return -ENOENT;
status = mgr->mops->status(mgr);
if (status & FPGA_MGR_STATUS_OPERATION_ERR)
len += sprintf(buf + len, "reconfig operation error\n");
if (status & FPGA_MGR_STATUS_CRC_ERR)
len += sprintf(buf + len, "reconfig CRC error\n");
if (status & FPGA_MGR_STATUS_INCOMPATIBLE_IMAGE_ERR)
len += sprintf(buf + len, "reconfig incompatible image\n");
if (status & FPGA_MGR_STATUS_IP_PROTOCOL_ERR)
len += sprintf(buf + len, "reconfig IP protocol error\n");
if (status & FPGA_MGR_STATUS_FIFO_OVERFLOW_ERR)
len += sprintf(buf + len, "reconfig fifo overflow 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);