drivers/edac/debugfs.c

Source file repositories/reference/linux-study-clean/drivers/edac/debugfs.c

File Facts

System
Linux kernel
Corpus path
drivers/edac/debugfs.c
Extension
.c
Size
4059 bytes
Lines
155
Domain
Driver Families
Bucket
drivers/edac
Inferred role
Driver Families: operation-table or driver-model contract
Status
pattern implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

static const struct file_operations debug_fake_inject_fops = {
	.open = simple_open,
	.write = edac_fake_inject_write,
	.llseek = generic_file_llseek,
};

void __init edac_debugfs_init(void)
{
	edac_debugfs = debugfs_create_dir("edac", NULL);
}

void edac_debugfs_exit(void)
{
	debugfs_remove_recursive(edac_debugfs);
}

void edac_create_debugfs_nodes(struct mem_ctl_info *mci)
{
	struct dentry *parent;
	char name[80];
	int i;

	parent = debugfs_create_dir(mci->dev.kobj.name, edac_debugfs);

	for (i = 0; i < mci->n_layers; i++) {
		sprintf(name, "fake_inject_%s",
			     edac_layer_name[mci->layers[i].type]);
		debugfs_create_u8(name, S_IRUGO | S_IWUSR, parent,
				  &mci->fake_inject_layer[i]);
	}

	debugfs_create_bool("fake_inject_ue", S_IRUGO | S_IWUSR, parent,
			    &mci->fake_inject_ue);

	debugfs_create_u16("fake_inject_count", S_IRUGO | S_IWUSR, parent,
			   &mci->fake_inject_count);

	debugfs_create_file("fake_inject", S_IWUSR, parent, &mci->dev,
			    &debug_fake_inject_fops);

	mci->debugfs = parent;
}

/* Create a toplevel dir under EDAC's debugfs hierarchy */
struct dentry *edac_debugfs_create_dir(const char *dirname)
{
	if (!edac_debugfs)
		return NULL;

	return debugfs_create_dir(dirname, edac_debugfs);
}
EXPORT_SYMBOL_GPL(edac_debugfs_create_dir);

/* Create a toplevel dir under EDAC's debugfs hierarchy with parent @parent */
struct dentry *
edac_debugfs_create_dir_at(const char *dirname, struct dentry *parent)
{
	return debugfs_create_dir(dirname, parent);
}
EXPORT_SYMBOL_GPL(edac_debugfs_create_dir_at);

/*
 * Create a file under EDAC's hierarchy or a sub-hierarchy:
 *
 * @name: file name
 * @mode: file permissions
 * @parent: parent dentry. If NULL, it becomes the toplevel EDAC dir
 * @data: private data of caller
 * @fops: file operations of this file
 */
struct dentry *
edac_debugfs_create_file(const char *name, umode_t mode, struct dentry *parent,
			 void *data, const struct file_operations *fops)
{
	if (!parent)
		parent = edac_debugfs;

	return debugfs_create_file(name, mode, parent, data, fops);
}
EXPORT_SYMBOL_GPL(edac_debugfs_create_file);

/* Wrapper for debugfs_create_x8() */
void edac_debugfs_create_x8(const char *name, umode_t mode,
			    struct dentry *parent, u8 *value)
{
	if (!parent)
		parent = edac_debugfs;

	debugfs_create_x8(name, mode, parent, value);
}

Annotation

Implementation Notes