1 files changed, 124 insertions, 0 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_debugfs.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_debugfs.c
new file mode 100644
index 000000000000..94e208e9789f
--- /dev/null
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_debugfs.c
@@ -0,0 +1,124 @@
+/* Broadcom NetXtreme-C/E network driver.
+ *
+ * Copyright (c) 2017-2018 Broadcom Limited
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation.
+ */
+
+#include <linux/debugfs.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include "bnxt_hsi.h"
+#include <linux/net_dim.h>
+#include "bnxt.h"
+#include "bnxt_debugfs.h"
+
+static struct dentry *bnxt_debug_mnt;
+
+static ssize_t debugfs_dim_read(struct file *filep,
+				char __user *buffer,
+				size_t count, loff_t *ppos)
+{
+	struct net_dim *dim = filep->private_data;
+	int len;
+	char *buf;
+
+	if (*ppos)
+		return 0;
+	if (!dim)
+		return -ENODEV;
+	buf = kasprintf(GFP_KERNEL,
+			"state = %d\n" \
+			"profile_ix = %d\n" \
+			"mode = %d\n" \
+			"tune_state = %d\n" \
+			"steps_right = %d\n" \
+			"steps_left = %d\n" \
+			"tired = %d\n",
+			dim->state,
+			dim->profile_ix,
+			dim->mode,
+			dim->tune_state,
+			dim->steps_right,
+			dim->steps_left,
+			dim->tired);
+	if (!buf)
+		return -ENOMEM;
+	if (count < strlen(buf)) {
+		kfree(buf);
+		return -ENOSPC;
+	}
+	len = simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf));
+	kfree(buf);
+	return len;
+}
+
+static const struct file_operations debugfs_dim_fops = {
+	.owner = THIS_MODULE,
+	.open = simple_open,
+	.read = debugfs_dim_read,
+};
+
+static struct dentry *debugfs_dim_ring_init(struct net_dim *dim, int ring_idx,
+					    struct dentry *dd)
+{
+	static char qname[16];
+
+	snprintf(qname, 10, "%d", ring_idx);
+	return debugfs_create_file(qname, 0600, dd,
+				   dim, &debugfs_dim_fops);
+}
+
+void bnxt_debug_dev_init(struct bnxt *bp)
+{
+	const char *pname = pci_name(bp->pdev);
+	struct dentry *pdevf;
+	int i;
+
+	bp->debugfs_pdev = debugfs_create_dir(pname, bnxt_debug_mnt);
+	if (bp->debugfs_pdev) {
+		pdevf = debugfs_create_dir("dim", bp->debugfs_pdev);
+		if (!pdevf) {
+			pr_err("failed to create debugfs entry %s/dim\n",
+			       pname);
+			return;
+		}
+		bp->debugfs_dim = pdevf;
+		/* create files for each rx ring */
+		for (i = 0; i < bp->cp_nr_rings; i++) {
+			struct bnxt_cp_ring_info *cpr = &bp->bnapi[i]->cp_ring;
+
+			if (cpr && bp->bnapi[i]->rx_ring) {
+				pdevf = debugfs_dim_ring_init(&cpr->dim, i,
+							      bp->debugfs_dim);
+				if (!pdevf)
+					pr_err("failed to create debugfs entry %s/dim/%d\n",
+					       pname, i);
+			}
+		}
+	} else {
+		pr_err("failed to create debugfs entry %s\n", pname);
+	}
+}
+
+void bnxt_debug_dev_exit(struct bnxt *bp)
+{
+	if (bp) {
+		debugfs_remove_recursive(bp->debugfs_pdev);
+		bp->debugfs_pdev = NULL;
+	}
+}
+
+void bnxt_debug_init(void)
+{
+	bnxt_debug_mnt = debugfs_create_dir("bnxt_en", NULL);
+	if (!bnxt_debug_mnt)
+		pr_err("failed to init bnxt_en debugfs\n");
+}
+
+void bnxt_debug_exit(void)
+{
+	debugfs_remove_recursive(bnxt_debug_mnt);
+}