1// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2/* Copyright (C) 2015-2019 Netronome Systems, Inc. */
3#include <linux/debugfs.h>
4#include <linux/module.h>
5#include <linux/rtnetlink.h>
6
7#include "nfp_net.h"
8#include "nfp_net_dp.h"
9
10static struct dentry *nfp_dir;
11
12static int nfp_rx_q_show(struct seq_file *file, void *data)
13{
14 struct nfp_net_r_vector *r_vec = file->private;
15 struct nfp_net_rx_ring *rx_ring;
16 int fl_rd_p, fl_wr_p, rxd_cnt;
17 struct nfp_net_rx_desc *rxd;
18 struct nfp_net *nn;
19 void *frag;
20 int i;
21
22 rtnl_lock();
23
24 if (!r_vec->nfp_net || !r_vec->rx_ring)
25 goto out;
26 nn = r_vec->nfp_net;
27 rx_ring = r_vec->rx_ring;
28 if (!nfp_net_running(nn))
29 goto out;
30
31 rxd_cnt = rx_ring->cnt;
32
33 fl_rd_p = nfp_qcp_rd_ptr_read(q: rx_ring->qcp_fl);
34 fl_wr_p = nfp_qcp_wr_ptr_read(q: rx_ring->qcp_fl);
35
36 seq_printf(m: file, fmt: "RX[%02d,%02d]: cnt=%u dma=%pad host=%p H_RD=%u H_WR=%u FL_RD=%u FL_WR=%u\n",
37 rx_ring->idx, rx_ring->fl_qcidx,
38 rx_ring->cnt, &rx_ring->dma, rx_ring->rxds,
39 rx_ring->rd_p, rx_ring->wr_p, fl_rd_p, fl_wr_p);
40
41 for (i = 0; i < rxd_cnt; i++) {
42 rxd = &rx_ring->rxds[i];
43 seq_printf(m: file, fmt: "%04d: 0x%08x 0x%08x", i,
44 rxd->vals[0], rxd->vals[1]);
45
46 if (!r_vec->xsk_pool) {
47 frag = READ_ONCE(rx_ring->rxbufs[i].frag);
48 if (frag)
49 seq_printf(m: file, fmt: " frag=%p", frag);
50
51 if (rx_ring->rxbufs[i].dma_addr)
52 seq_printf(m: file, fmt: " dma_addr=%pad",
53 &rx_ring->rxbufs[i].dma_addr);
54 } else {
55 if (rx_ring->xsk_rxbufs[i].dma_addr)
56 seq_printf(m: file, fmt: " dma_addr=%pad",
57 &rx_ring->xsk_rxbufs[i].dma_addr);
58 }
59
60 if (i == rx_ring->rd_p % rxd_cnt)
61 seq_puts(m: file, s: " H_RD ");
62 if (i == rx_ring->wr_p % rxd_cnt)
63 seq_puts(m: file, s: " H_WR ");
64 if (i == fl_rd_p % rxd_cnt)
65 seq_puts(m: file, s: " FL_RD");
66 if (i == fl_wr_p % rxd_cnt)
67 seq_puts(m: file, s: " FL_WR");
68
69 seq_putc(m: file, c: '\n');
70 }
71out:
72 rtnl_unlock();
73 return 0;
74}
75DEFINE_SHOW_ATTRIBUTE(nfp_rx_q);
76
77static int nfp_tx_q_show(struct seq_file *file, void *data);
78DEFINE_SHOW_ATTRIBUTE(nfp_tx_q);
79
80static int nfp_tx_q_show(struct seq_file *file, void *data)
81{
82 struct nfp_net_r_vector *r_vec = file->private;
83 struct nfp_net_tx_ring *tx_ring;
84 struct nfp_net *nn;
85 int d_rd_p, d_wr_p;
86
87 rtnl_lock();
88
89 if (debugfs_real_fops(filp: file->file) == &nfp_tx_q_fops)
90 tx_ring = r_vec->tx_ring;
91 else
92 tx_ring = r_vec->xdp_ring;
93 if (!r_vec->nfp_net || !tx_ring)
94 goto out;
95 nn = r_vec->nfp_net;
96 if (!nfp_net_running(nn))
97 goto out;
98
99 d_rd_p = nfp_qcp_rd_ptr_read(q: tx_ring->qcp_q);
100 d_wr_p = nfp_qcp_wr_ptr_read(q: tx_ring->qcp_q);
101
102 seq_printf(m: file, fmt: "TX[%02d,%02d%s]: cnt=%u dma=%pad host=%p H_RD=%u H_WR=%u D_RD=%u D_WR=%u",
103 tx_ring->idx, tx_ring->qcidx,
104 tx_ring == r_vec->tx_ring ? "" : "xdp",
105 tx_ring->cnt, &tx_ring->dma, tx_ring->txds,
106 tx_ring->rd_p, tx_ring->wr_p, d_rd_p, d_wr_p);
107 if (tx_ring->txrwb)
108 seq_printf(m: file, fmt: " TXRWB=%llu", *tx_ring->txrwb);
109 seq_putc(m: file, c: '\n');
110
111 nfp_net_debugfs_print_tx_descs(file, dp: &nn->dp, r_vec, tx_ring,
112 d_rd_p, d_wr_p);
113out:
114 rtnl_unlock();
115 return 0;
116}
117
118static int nfp_xdp_q_show(struct seq_file *file, void *data)
119{
120 return nfp_tx_q_show(file, data);
121}
122DEFINE_SHOW_ATTRIBUTE(nfp_xdp_q);
123
124void nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir)
125{
126 struct dentry *queues, *tx, *rx, *xdp;
127 char name[20];
128 int i;
129
130 if (IS_ERR_OR_NULL(ptr: nfp_dir))
131 return;
132
133 if (nfp_net_is_data_vnic(nn))
134 sprintf(buf: name, fmt: "vnic%d", nn->id);
135 else
136 strcpy(p: name, q: "ctrl-vnic");
137 nn->debugfs_dir = debugfs_create_dir(name, parent: ddir);
138
139 /* Create queue debugging sub-tree */
140 queues = debugfs_create_dir(name: "queue", parent: nn->debugfs_dir);
141
142 rx = debugfs_create_dir(name: "rx", parent: queues);
143 tx = debugfs_create_dir(name: "tx", parent: queues);
144 xdp = debugfs_create_dir(name: "xdp", parent: queues);
145
146 for (i = 0; i < min(nn->max_rx_rings, nn->max_r_vecs); i++) {
147 sprintf(buf: name, fmt: "%d", i);
148 debugfs_create_file(name, mode: 0400, parent: rx,
149 data: &nn->r_vecs[i], fops: &nfp_rx_q_fops);
150 debugfs_create_file(name, mode: 0400, parent: xdp,
151 data: &nn->r_vecs[i], fops: &nfp_xdp_q_fops);
152 }
153
154 for (i = 0; i < min(nn->max_tx_rings, nn->max_r_vecs); i++) {
155 sprintf(buf: name, fmt: "%d", i);
156 debugfs_create_file(name, mode: 0400, parent: tx,
157 data: &nn->r_vecs[i], fops: &nfp_tx_q_fops);
158 }
159}
160
161struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev)
162{
163 return debugfs_create_dir(name: pci_name(pdev), parent: nfp_dir);
164}
165
166void nfp_net_debugfs_dir_clean(struct dentry **dir)
167{
168 debugfs_remove_recursive(dentry: *dir);
169 *dir = NULL;
170}
171
172void nfp_net_debugfs_create(void)
173{
174 nfp_dir = debugfs_create_dir(name: "nfp_net", NULL);
175}
176
177void nfp_net_debugfs_destroy(void)
178{
179 debugfs_remove_recursive(dentry: nfp_dir);
180 nfp_dir = NULL;
181}
182

source code of linux/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c