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/*
* Copyright (C) 2015-2017 Netronome Systems, Inc.
*
* This software is dual licensed under the GNU General License Version 2,
* June 1991 as shown in the file COPYING in the top-level directory of this
* source tree or the BSD 2-Clause License provided below. You have the
* option to license this software under the complete terms of either license.
*
* The BSD 2-Clause License:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/debugfs.h>
#include <linux/module.h>
#include <linux/rtnetlink.h>
#include "nfp_net.h"
static struct dentry *nfp_dir;
static int nfp_net_debugfs_rx_q_read(struct seq_file *file, void *data)
{
struct nfp_net_r_vector *r_vec = file->private;
struct nfp_net_rx_ring *rx_ring;
int fl_rd_p, fl_wr_p, rxd_cnt;
struct nfp_net_rx_desc *rxd;
struct nfp_net *nn;
void *frag;
int i;
rtnl_lock();
if (!r_vec->nfp_net || !r_vec->rx_ring)
goto out;
nn = r_vec->nfp_net;
rx_ring = r_vec->rx_ring;
if (!netif_running(nn->dp.netdev))
goto out;
rxd_cnt = rx_ring->cnt;
fl_rd_p = nfp_qcp_rd_ptr_read(rx_ring->qcp_fl);
fl_wr_p = nfp_qcp_wr_ptr_read(rx_ring->qcp_fl);
seq_printf(file, "RX[%02d,%02d]: cnt=%d dma=%pad host=%p H_RD=%d H_WR=%d FL_RD=%d FL_WR=%d\n",
rx_ring->idx, rx_ring->fl_qcidx,
rx_ring->cnt, &rx_ring->dma, rx_ring->rxds,
rx_ring->rd_p, rx_ring->wr_p, fl_rd_p, fl_wr_p);
for (i = 0; i < rxd_cnt; i++) {
rxd = &rx_ring->rxds[i];
seq_printf(file, "%04d: 0x%08x 0x%08x", i,
rxd->vals[0], rxd->vals[1]);
frag = READ_ONCE(rx_ring->rxbufs[i].frag);
if (frag)
seq_printf(file, " frag=%p", frag);
if (rx_ring->rxbufs[i].dma_addr)
seq_printf(file, " dma_addr=%pad",
&rx_ring->rxbufs[i].dma_addr);
if (i == rx_ring->rd_p % rxd_cnt)
seq_puts(file, " H_RD ");
if (i == rx_ring->wr_p % rxd_cnt)
seq_puts(file, " H_WR ");
if (i == fl_rd_p % rxd_cnt)
seq_puts(file, " FL_RD");
if (i == fl_wr_p % rxd_cnt)
seq_puts(file, " FL_WR");
seq_putc(file, '\n');
}
out:
rtnl_unlock();
return 0;
}
static int nfp_net_debugfs_rx_q_open(struct inode *inode, struct file *f)
{
return single_open(f, nfp_net_debugfs_rx_q_read, inode->i_private);
}
static const struct file_operations nfp_rx_q_fops = {
.owner = THIS_MODULE,
.open = nfp_net_debugfs_rx_q_open,
.release = single_release,
.read = seq_read,
.llseek = seq_lseek
};
static int nfp_net_debugfs_tx_q_open(struct inode *inode, struct file *f);
static const struct file_operations nfp_tx_q_fops = {
.owner = THIS_MODULE,
.open = nfp_net_debugfs_tx_q_open,
.release = single_release,
.read = seq_read,
.llseek = seq_lseek
};
static int nfp_net_debugfs_tx_q_read(struct seq_file *file, void *data)
{
struct nfp_net_r_vector *r_vec = file->private;
struct nfp_net_tx_ring *tx_ring;
struct nfp_net_tx_desc *txd;
int d_rd_p, d_wr_p, txd_cnt;
struct sk_buff *skb;
struct nfp_net *nn;
int i;
rtnl_lock();
if (debugfs_real_fops(file->file) == &nfp_tx_q_fops)
tx_ring = r_vec->tx_ring;
else
tx_ring = r_vec->xdp_ring;
if (!r_vec->nfp_net || !tx_ring)
goto out;
nn = r_vec->nfp_net;
if (!netif_running(nn->dp.netdev))
goto out;
txd_cnt = tx_ring->cnt;
d_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q);
d_wr_p = nfp_qcp_wr_ptr_read(tx_ring->qcp_q);
seq_printf(file, "TX[%02d,%02d%s]: cnt=%d dma=%pad host=%p H_RD=%d H_WR=%d D_RD=%d D_WR=%d\n",
tx_ring->idx, tx_ring->qcidx,
tx_ring == r_vec->tx_ring ? "" : "xdp",
tx_ring->cnt, &tx_ring->dma, tx_ring->txds,
tx_ring->rd_p, tx_ring->wr_p, d_rd_p, d_wr_p);
for (i = 0; i < txd_cnt; i++) {
txd = &tx_ring->txds[i];
seq_printf(file, "%04d: 0x%08x 0x%08x 0x%08x 0x%08x", i,
txd->vals[0], txd->vals[1],
txd->vals[2], txd->vals[3]);
skb = READ_ONCE(tx_ring->txbufs[i].skb);
if (skb) {
if (tx_ring == r_vec->tx_ring)
seq_printf(file, " skb->head=%p skb->data=%p",
skb->head, skb->data);
else
seq_printf(file, " frag=%p", skb);
}
if (tx_ring->txbufs[i].dma_addr)
seq_printf(file, " dma_addr=%pad",
&tx_ring->txbufs[i].dma_addr);
if (i == tx_ring->rd_p % txd_cnt)
seq_puts(file, " H_RD");
if (i == tx_ring->wr_p % txd_cnt)
seq_puts(file, " H_WR");
if (i == d_rd_p % txd_cnt)
seq_puts(file, " D_RD");
if (i == d_wr_p % txd_cnt)
seq_puts(file, " D_WR");
seq_putc(file, '\n');
}
out:
rtnl_unlock();
return 0;
}
static int nfp_net_debugfs_tx_q_open(struct inode *inode, struct file *f)
{
return single_open(f, nfp_net_debugfs_tx_q_read, inode->i_private);
}
static const struct file_operations nfp_xdp_q_fops = {
.owner = THIS_MODULE,
.open = nfp_net_debugfs_tx_q_open,
.release = single_release,
.read = seq_read,
.llseek = seq_lseek
};
void nfp_net_debugfs_port_add(struct nfp_net *nn, struct dentry *ddir, int id)
{
struct dentry *queues, *tx, *rx, *xdp;
char name[20];
int i;
if (IS_ERR_OR_NULL(nfp_dir))
return;
sprintf(name, "port%d", id);
nn->debugfs_dir = debugfs_create_dir(name, ddir);
if (IS_ERR_OR_NULL(nn->debugfs_dir))
return;
/* Create queue debugging sub-tree */
queues = debugfs_create_dir("queue", nn->debugfs_dir);
if (IS_ERR_OR_NULL(queues))
return;
rx = debugfs_create_dir("rx", queues);
tx = debugfs_create_dir("tx", queues);
xdp = debugfs_create_dir("xdp", queues);
if (IS_ERR_OR_NULL(rx) || IS_ERR_OR_NULL(tx) || IS_ERR_OR_NULL(xdp))
return;
for (i = 0; i < min(nn->max_rx_rings, nn->max_r_vecs); i++) {
sprintf(name, "%d", i);
debugfs_create_file(name, S_IRUSR, rx,
&nn->r_vecs[i], &nfp_rx_q_fops);
debugfs_create_file(name, S_IRUSR, xdp,
&nn->r_vecs[i], &nfp_xdp_q_fops);
}
for (i = 0; i < min(nn->max_tx_rings, nn->max_r_vecs); i++) {
sprintf(name, "%d", i);
debugfs_create_file(name, S_IRUSR, tx,
&nn->r_vecs[i], &nfp_tx_q_fops);
}
}
struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev)
{
struct dentry *dev_dir;
if (IS_ERR_OR_NULL(nfp_dir))
return NULL;
dev_dir = debugfs_create_dir(pci_name(pdev), nfp_dir);
if (IS_ERR_OR_NULL(dev_dir))
return NULL;
return dev_dir;
}
void nfp_net_debugfs_dir_clean(struct dentry **dir)
{
debugfs_remove_recursive(*dir);
*dir = NULL;
}
void nfp_net_debugfs_create(void)
{
nfp_dir = debugfs_create_dir("nfp_net", NULL);
}
void nfp_net_debugfs_destroy(void)
{
debugfs_remove_recursive(nfp_dir);
nfp_dir = NULL;
}
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