--- /dev/null
+/* Intel Ethernet Switch Host Interface Driver
+ * Copyright(c) 2013 - 2014 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ * Contact Information:
+ * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ */
+
+#ifdef CONFIG_DEBUG_FS
+
+#include "fm10k.h"
+
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+static struct dentry *dbg_root;
+
+/* Descriptor Seq Functions */
+
+static void *fm10k_dbg_desc_seq_start(struct seq_file *s, loff_t *pos)
+{
+ struct fm10k_ring *ring = s->private;
+
+ return (*pos < ring->count) ? pos : NULL;
+}
+
+static void *fm10k_dbg_desc_seq_next(struct seq_file *s, void *v, loff_t *pos)
+{
+ struct fm10k_ring *ring = s->private;
+
+ return (++(*pos) < ring->count) ? pos : NULL;
+}
+
+static void fm10k_dbg_desc_seq_stop(struct seq_file *s, void *v)
+{
+ /* Do nothing. */
+}
+
+static void fm10k_dbg_desc_break(struct seq_file *s, int i)
+{
+ while (i--)
+ seq_puts(s, "-");
+
+ seq_puts(s, "\n");
+}
+
+static int fm10k_dbg_tx_desc_seq_show(struct seq_file *s, void *v)
+{
+ struct fm10k_ring *ring = s->private;
+ int i = *(loff_t *)v;
+ static const char tx_desc_hdr[] =
+ "DES BUFFER_ADDRESS LENGTH VLAN MSS HDRLEN FLAGS\n";
+
+ /* Generate header */
+ if (!i) {
+ seq_printf(s, tx_desc_hdr);
+ fm10k_dbg_desc_break(s, sizeof(tx_desc_hdr) - 1);
+ }
+
+ /* Validate descriptor allocation */
+ if (!ring->desc) {
+ seq_printf(s, "%03X Descriptor ring not allocated.\n", i);
+ } else {
+ struct fm10k_tx_desc *txd = FM10K_TX_DESC(ring, i);
+
+ seq_printf(s, "%03X %#018llx %#06x %#06x %#06x %#06x %#04x\n",
+ i, txd->buffer_addr, txd->buflen, txd->vlan,
+ txd->mss, txd->hdrlen, txd->flags);
+ }
+
+ return 0;
+}
+
+static int fm10k_dbg_rx_desc_seq_show(struct seq_file *s, void *v)
+{
+ struct fm10k_ring *ring = s->private;
+ int i = *(loff_t *)v;
+ static const char rx_desc_hdr[] =
+ "DES DATA RSS STATERR LENGTH VLAN DGLORT SGLORT TIMESTAMP\n";
+
+ /* Generate header */
+ if (!i) {
+ seq_printf(s, rx_desc_hdr);
+ fm10k_dbg_desc_break(s, sizeof(rx_desc_hdr) - 1);
+ }
+
+ /* Validate descriptor allocation */
+ if (!ring->desc) {
+ seq_printf(s, "%03X Descriptor ring not allocated.\n", i);
+ } else {
+ union fm10k_rx_desc *rxd = FM10K_RX_DESC(ring, i);
+
+ seq_printf(s,
+ "%03X %#010x %#010x %#010x %#06x %#06x %#06x %#06x %#018llx\n",
+ i, rxd->d.data, rxd->d.rss, rxd->d.staterr,
+ rxd->w.length, rxd->w.vlan, rxd->w.dglort,
+ rxd->w.sglort, rxd->q.timestamp);
+ }
+
+ return 0;
+}
+
+static const struct seq_operations fm10k_dbg_tx_desc_seq_ops = {
+ .start = fm10k_dbg_desc_seq_start,
+ .next = fm10k_dbg_desc_seq_next,
+ .stop = fm10k_dbg_desc_seq_stop,
+ .show = fm10k_dbg_tx_desc_seq_show,
+};
+
+static const struct seq_operations fm10k_dbg_rx_desc_seq_ops = {
+ .start = fm10k_dbg_desc_seq_start,
+ .next = fm10k_dbg_desc_seq_next,
+ .stop = fm10k_dbg_desc_seq_stop,
+ .show = fm10k_dbg_rx_desc_seq_show,
+};
+
+static int fm10k_dbg_desc_open(struct inode *inode, struct file *filep)
+{
+ struct fm10k_ring *ring = inode->i_private;
+ struct fm10k_q_vector *q_vector = ring->q_vector;
+ const struct seq_operations *desc_seq_ops;
+ int err;
+
+ if (ring < q_vector->rx.ring)
+ desc_seq_ops = &fm10k_dbg_tx_desc_seq_ops;
+ else
+ desc_seq_ops = &fm10k_dbg_rx_desc_seq_ops;
+
+ err = seq_open(filep, desc_seq_ops);
+ if (err)
+ return err;
+
+ ((struct seq_file *)filep->private_data)->private = ring;
+
+ return 0;
+}
+
+static const struct file_operations fm10k_dbg_desc_fops = {
+ .owner = THIS_MODULE,
+ .open = fm10k_dbg_desc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+/**
+ * fm10k_dbg_q_vector_init - setup debugfs for the q_vectors
+ * @q_vector: q_vector to allocate directories for
+ *
+ * A folder is created for each q_vector found. In each q_vector
+ * folder, a debugfs file is created for each tx and rx ring
+ * allocated to the q_vector.
+ **/
+void fm10k_dbg_q_vector_init(struct fm10k_q_vector *q_vector)
+{
+ struct fm10k_intfc *interface = q_vector->interface;
+ char name[16];
+ int i;
+
+ if (!interface->dbg_intfc)
+ return;
+
+ /* Generate a folder for each q_vector */
+ sprintf(name, "q_vector.%03d", q_vector->v_idx);
+
+ q_vector->dbg_q_vector = debugfs_create_dir(name, interface->dbg_intfc);
+ if (!q_vector->dbg_q_vector)
+ return;
+
+ /* Generate a file for each rx ring in the q_vector */
+ for (i = 0; i < q_vector->tx.count; i++) {
+ struct fm10k_ring *ring = &q_vector->tx.ring[i];
+
+ sprintf(name, "tx_ring.%03d", ring->queue_index);
+
+ debugfs_create_file(name, 0600,
+ q_vector->dbg_q_vector, ring,
+ &fm10k_dbg_desc_fops);
+ }
+
+ /* Generate a file for each rx ring in the q_vector */
+ for (i = 0; i < q_vector->rx.count; i++) {
+ struct fm10k_ring *ring = &q_vector->rx.ring[i];
+
+ sprintf(name, "rx_ring.%03d", ring->queue_index);
+
+ debugfs_create_file(name, 0600,
+ q_vector->dbg_q_vector, ring,
+ &fm10k_dbg_desc_fops);
+ }
+}
+
+/**
+ * fm10k_dbg_free_q_vector_dir - setup debugfs for the q_vectors
+ * @q_vector: q_vector to allocate directories for
+ **/
+void fm10k_dbg_q_vector_exit(struct fm10k_q_vector *q_vector)
+{
+ struct fm10k_intfc *interface = q_vector->interface;
+
+ if (interface->dbg_intfc)
+ debugfs_remove_recursive(q_vector->dbg_q_vector);
+ q_vector->dbg_q_vector = NULL;
+}
+
+/**
+ * fm10k_dbg_intfc_init - setup the debugfs directory for the intferface
+ * @interface: the interface that is starting up
+ **/
+
+void fm10k_dbg_intfc_init(struct fm10k_intfc *interface)
+{
+ const char *name = pci_name(interface->pdev);
+
+ if (dbg_root)
+ interface->dbg_intfc = debugfs_create_dir(name, dbg_root);
+}
+
+/**
+ * fm10k_dbg_intfc_exit - clean out the interface's debugfs entries
+ * @interface: the interface that is stopping
+ **/
+void fm10k_dbg_intfc_exit(struct fm10k_intfc *interface)
+{
+ if (dbg_root)
+ debugfs_remove_recursive(interface->dbg_intfc);
+ interface->dbg_intfc = NULL;
+}
+
+/**
+ * fm10k_dbg_init - start up debugfs for the driver
+ **/
+void fm10k_dbg_init(void)
+{
+ dbg_root = debugfs_create_dir(fm10k_driver_name, NULL);
+}
+
+/**
+ * fm10k_dbg_exit - clean out the driver's debugfs entries
+ **/
+void fm10k_dbg_exit(void)
+{
+ debugfs_remove_recursive(dbg_root);
+ dbg_root = NULL;
+}
+
+#endif /* CONFIG_DEBUG_FS */
projects / platform / kernel / linux-rpi.git / commitdiff