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
10 static struct dentry *nfp_dir;
11
nfp_rx_q_show(struct seq_file * file,void * data)12 static 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 }
71 out:
72 rtnl_unlock();
73 return 0;
74 }
75 DEFINE_SHOW_ATTRIBUTE(nfp_rx_q);
76
77 static int nfp_tx_q_show(struct seq_file *file, void *data);
78 DEFINE_SHOW_ATTRIBUTE(nfp_tx_q);
79
nfp_tx_q_show(struct seq_file * file,void * data)80 static 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);
113 out:
114 rtnl_unlock();
115 return 0;
116 }
117
nfp_xdp_q_show(struct seq_file * file,void * data)118 static int nfp_xdp_q_show(struct seq_file *file, void *data)
119 {
120 return nfp_tx_q_show(file, data);
121 }
122 DEFINE_SHOW_ATTRIBUTE(nfp_xdp_q);
123
nfp_net_debugfs_vnic_add(struct nfp_net * nn,struct dentry * ddir)124 void 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
nfp_net_debugfs_device_add(struct pci_dev * pdev)161 struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev)
162 {
163 return debugfs_create_dir(pci_name(pdev), nfp_dir);
164 }
165
nfp_net_debugfs_dir_clean(struct dentry ** dir)166 void nfp_net_debugfs_dir_clean(struct dentry **dir)
167 {
168 debugfs_remove_recursive(*dir);
169 *dir = NULL;
170 }
171
nfp_net_debugfs_create(void)172 void nfp_net_debugfs_create(void)
173 {
174 nfp_dir = debugfs_create_dir("nfp_net", NULL);
175 }
176
nfp_net_debugfs_destroy(void)177 void nfp_net_debugfs_destroy(void)
178 {
179 debugfs_remove_recursive(nfp_dir);
180 nfp_dir = NULL;
181 }
182