/* Intel Ethernet Switch Host Interface Driver
* Copyright(c) 2013 - 2015 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 __always_unused *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 __always_unused *s,
__always_unused 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 */
