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}