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(rx_ring->qcp_fl);
34	fl_wr_p = nfp_qcp_wr_ptr_read(rx_ring->qcp_fl);
35
36	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",
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(file, "%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(file, " frag=%p", frag);
50
51			if (rx_ring->rxbufs[i].dma_addr)
52				seq_printf(file, " dma_addr=%pad",
53					   &rx_ring->rxbufs[i].dma_addr);
54		} else {
55			if (rx_ring->xsk_rxbufs[i].dma_addr)
56				seq_printf(file, " 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(file, " H_RD ");
62		if (i == rx_ring->wr_p % rxd_cnt)
63			seq_puts(file, " H_WR ");
64		if (i == fl_rd_p % rxd_cnt)
65			seq_puts(file, " FL_RD");
66		if (i == fl_wr_p % rxd_cnt)
67			seq_puts(file, " FL_WR");
68
69		seq_putc(file, '\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(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(tx_ring->qcp_q);
100	d_wr_p = nfp_qcp_wr_ptr_read(tx_ring->qcp_q);
101
102	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",
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(file, " TXRWB=%llu", *tx_ring->txrwb);
109	seq_putc(file, '\n');
110
111	nfp_net_debugfs_print_tx_descs(file, &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(nfp_dir))
131		return;
132
133	if (nfp_net_is_data_vnic(nn))
134		sprintf(name, "vnic%d", nn->id);
135	else
136		strcpy(name, "ctrl-vnic");
137	nn->debugfs_dir = debugfs_create_dir(name, ddir);
138
139	/* Create queue debugging sub-tree */
140	queues = debugfs_create_dir("queue", nn->debugfs_dir);
141
142	rx = debugfs_create_dir("rx", queues);
143	tx = debugfs_create_dir("tx", queues);
144	xdp = debugfs_create_dir("xdp", queues);
145
146	for (i = 0; i < min(nn->max_rx_rings, nn->max_r_vecs); i++) {
147		sprintf(name, "%d", i);
148		debugfs_create_file(name, 0400, rx,
149				    &nn->r_vecs[i], &nfp_rx_q_fops);
150		debugfs_create_file(name, 0400, xdp,
151				    &nn->r_vecs[i], &nfp_xdp_q_fops);
152	}
153
154	for (i = 0; i < min(nn->max_tx_rings, nn->max_r_vecs); i++) {
155		sprintf(name, "%d", i);
156		debugfs_create_file(name, 0400, tx,
157				    &nn->r_vecs[i], &nfp_tx_q_fops);
158	}
159}
160
161struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev)
162{
163	return debugfs_create_dir(pci_name(pdev), nfp_dir);
164}
165
166void nfp_net_debugfs_dir_clean(struct dentry **dir)
167{
168	debugfs_remove_recursive(*dir);
169	*dir = NULL;
170}
171
172void nfp_net_debugfs_create(void)
173{
174	nfp_dir = debugfs_create_dir("nfp_net", NULL);
175}
176
177void nfp_net_debugfs_destroy(void)
178{
179	debugfs_remove_recursive(nfp_dir);
180	nfp_dir = NULL;
181}
182