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authorAbhijit Gangurde <abhijit.gangurde@amd.com>2023-12-22 09:46:27 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2024-01-04 19:01:13 +0300
commitcf60af04edfe51fca488246c9959904adb2750fa (patch)
tree007cd12056dcaabb83594f878174f95dfee3759c /drivers/cdx
parentaeda33ab8160c7a2e24ba4f44492ad1e974ddc7d (diff)
downloadlinux-cf60af04edfe51fca488246c9959904adb2750fa.tar.xz
cdx: Create resource debugfs file for cdx device
resource debugfs file contains host addresses of CDX device resources. Each line of the resource file describe type of resource, a region with start-end and flag fields. Signed-off-by: Abhijit Gangurde <abhijit.gangurde@amd.com> Link: https://lore.kernel.org/r/20231222064627.2828960-2-abhijit.gangurde@amd.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/cdx')
-rw-r--r--drivers/cdx/cdx.c39
1 files changed, 38 insertions, 1 deletions
diff --git a/drivers/cdx/cdx.c b/drivers/cdx/cdx.c
index 2ec1846ff063..c0fca63c7434 100644
--- a/drivers/cdx/cdx.c
+++ b/drivers/cdx/cdx.c
@@ -67,6 +67,7 @@
#include <linux/cdx/cdx_bus.h>
#include <linux/iommu.h>
#include <linux/dma-map-ops.h>
+#include <linux/debugfs.h>
#include "cdx.h"
/* Default DMA mask for devices on a CDX bus */
@@ -77,6 +78,8 @@
static DEFINE_IDA(cdx_controller_ida);
/* Lock to protect controller ops */
static DEFINE_MUTEX(cdx_controller_lock);
+/* Debugfs dir for cdx bus */
+static struct dentry *cdx_debugfs_dir;
static char *compat_node_name = "xlnx,versal-net-cdx";
@@ -151,6 +154,7 @@ static int cdx_unregister_device(struct device *dev,
cdx->ops->bus_disable(cdx, cdx_dev->bus_num);
} else {
cdx_destroy_res_attr(cdx_dev, MAX_CDX_DEV_RESOURCES);
+ debugfs_remove_recursive(cdx_dev->debugfs_dir);
kfree(cdx_dev->driver_override);
cdx_dev->driver_override = NULL;
}
@@ -554,6 +558,31 @@ static const struct attribute_group *cdx_dev_groups[] = {
NULL,
};
+static int cdx_debug_resource_show(struct seq_file *s, void *data)
+{
+ struct cdx_device *cdx_dev = s->private;
+ int i;
+
+ for (i = 0; i < MAX_CDX_DEV_RESOURCES; i++) {
+ struct resource *res = &cdx_dev->res[i];
+
+ seq_printf(s, "%pr\n", res);
+ }
+
+ return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(cdx_debug_resource);
+
+static void cdx_device_debugfs_init(struct cdx_device *cdx_dev)
+{
+ cdx_dev->debugfs_dir = debugfs_create_dir(dev_name(&cdx_dev->dev), cdx_debugfs_dir);
+ if (IS_ERR(cdx_dev->debugfs_dir))
+ return;
+
+ debugfs_create_file("resource", 0444, cdx_dev->debugfs_dir, cdx_dev,
+ &cdx_debug_resource_fops);
+}
+
static ssize_t rescan_store(const struct bus_type *bus,
const char *buf, size_t count)
{
@@ -803,6 +832,8 @@ int cdx_device_add(struct cdx_dev_params *dev_params)
}
}
+ cdx_device_debugfs_init(cdx_dev);
+
return 0;
resource_create_fail:
cdx_destroy_res_attr(cdx_dev, i);
@@ -907,6 +938,12 @@ EXPORT_SYMBOL_NS_GPL(cdx_unregister_controller, CDX_BUS_CONTROLLER);
static int __init cdx_bus_init(void)
{
- return bus_register(&cdx_bus_type);
+ int ret;
+
+ ret = bus_register(&cdx_bus_type);
+ if (!ret)
+ cdx_debugfs_dir = debugfs_create_dir(cdx_bus_type.name, NULL);
+
+ return ret;
}
postcore_initcall(cdx_bus_init);