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