mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 11:49:32 +00:00
![Jakub Kicinski](/assets/img/avatar_default.png)
We were reusing skb pointer when reading page frag, since ring entries contain a union of a skb and frag pointer. This can be confusing to people reading the code. Refactor the code to read frag pointer directly. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Simon Horman <simon.horman@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
276 lines
7.3 KiB
C
276 lines
7.3 KiB
C
/*
|
|
* 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 (!nfp_net_running(nn))
|
|
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=%u dma=%pad host=%p H_RD=%u H_WR=%u FL_RD=%u FL_WR=%u\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 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 (!nfp_net_running(nn))
|
|
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=%u dma=%pad host=%p H_RD=%u H_WR=%u D_RD=%u D_WR=%u\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]);
|
|
|
|
if (tx_ring == r_vec->tx_ring) {
|
|
struct sk_buff *skb = READ_ONCE(tx_ring->txbufs[i].skb);
|
|
|
|
if (skb)
|
|
seq_printf(file, " skb->head=%p skb->data=%p",
|
|
skb->head, skb->data);
|
|
} else {
|
|
seq_printf(file, " frag=%p",
|
|
READ_ONCE(tx_ring->txbufs[i].frag));
|
|
}
|
|
|
|
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_vnic_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;
|
|
|
|
if (nfp_net_is_data_vnic(nn))
|
|
sprintf(name, "vnic%d", id);
|
|
else
|
|
strcpy(name, "ctrl-vnic");
|
|
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;
|
|
}
|