1 /* 2 * Copyright (C) 2015 Netronome Systems, Inc. 3 * 4 * This software is dual licensed under the GNU General License Version 2, 5 * June 1991 as shown in the file COPYING in the top-level directory of this 6 * source tree or the BSD 2-Clause License provided below. You have the 7 * option to license this software under the complete terms of either license. 8 * 9 * The BSD 2-Clause License: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * 1. Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * 2. Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 #include <linux/debugfs.h> 34 #include <linux/module.h> 35 #include <linux/rtnetlink.h> 36 37 #include "nfp_net.h" 38 39 static struct dentry *nfp_dir; 40 41 static int nfp_net_debugfs_rx_q_read(struct seq_file *file, void *data) 42 { 43 int fl_rd_p, fl_wr_p, rx_rd_p, rx_wr_p, rxd_cnt; 44 struct nfp_net_r_vector *r_vec = file->private; 45 struct nfp_net_rx_ring *rx_ring; 46 struct nfp_net_rx_desc *rxd; 47 struct sk_buff *skb; 48 struct nfp_net *nn; 49 int i; 50 51 rtnl_lock(); 52 53 if (!r_vec->nfp_net || !r_vec->rx_ring) 54 goto out; 55 nn = r_vec->nfp_net; 56 rx_ring = r_vec->rx_ring; 57 if (!netif_running(nn->netdev)) 58 goto out; 59 60 rxd_cnt = rx_ring->cnt; 61 62 fl_rd_p = nfp_qcp_rd_ptr_read(rx_ring->qcp_fl); 63 fl_wr_p = nfp_qcp_wr_ptr_read(rx_ring->qcp_fl); 64 rx_rd_p = nfp_qcp_rd_ptr_read(rx_ring->qcp_rx); 65 rx_wr_p = nfp_qcp_wr_ptr_read(rx_ring->qcp_rx); 66 67 seq_printf(file, "RX[%02d]: H_RD=%d H_WR=%d FL_RD=%d FL_WR=%d RX_RD=%d RX_WR=%d\n", 68 rx_ring->idx, rx_ring->rd_p, rx_ring->wr_p, 69 fl_rd_p, fl_wr_p, rx_rd_p, rx_wr_p); 70 71 for (i = 0; i < rxd_cnt; i++) { 72 rxd = &rx_ring->rxds[i]; 73 seq_printf(file, "%04d: 0x%08x 0x%08x", i, 74 rxd->vals[0], rxd->vals[1]); 75 76 skb = READ_ONCE(rx_ring->rxbufs[i].skb); 77 if (skb) 78 seq_printf(file, " skb->head=%p skb->data=%p", 79 skb->head, skb->data); 80 81 if (rx_ring->rxbufs[i].dma_addr) 82 seq_printf(file, " dma_addr=%pad", 83 &rx_ring->rxbufs[i].dma_addr); 84 85 if (i == rx_ring->rd_p % rxd_cnt) 86 seq_puts(file, " H_RD "); 87 if (i == rx_ring->wr_p % rxd_cnt) 88 seq_puts(file, " H_WR "); 89 if (i == fl_rd_p % rxd_cnt) 90 seq_puts(file, " FL_RD"); 91 if (i == fl_wr_p % rxd_cnt) 92 seq_puts(file, " FL_WR"); 93 if (i == rx_rd_p % rxd_cnt) 94 seq_puts(file, " RX_RD"); 95 if (i == rx_wr_p % rxd_cnt) 96 seq_puts(file, " RX_WR"); 97 98 seq_putc(file, '\n'); 99 } 100 out: 101 rtnl_unlock(); 102 return 0; 103 } 104 105 static int nfp_net_debugfs_rx_q_open(struct inode *inode, struct file *f) 106 { 107 return single_open(f, nfp_net_debugfs_rx_q_read, inode->i_private); 108 } 109 110 static const struct file_operations nfp_rx_q_fops = { 111 .owner = THIS_MODULE, 112 .open = nfp_net_debugfs_rx_q_open, 113 .release = single_release, 114 .read = seq_read, 115 .llseek = seq_lseek 116 }; 117 118 static int nfp_net_debugfs_tx_q_read(struct seq_file *file, void *data) 119 { 120 struct nfp_net_r_vector *r_vec = file->private; 121 struct nfp_net_tx_ring *tx_ring; 122 struct nfp_net_tx_desc *txd; 123 int d_rd_p, d_wr_p, txd_cnt; 124 struct sk_buff *skb; 125 struct nfp_net *nn; 126 int i; 127 128 rtnl_lock(); 129 130 if (!r_vec->nfp_net || !r_vec->tx_ring) 131 goto out; 132 nn = r_vec->nfp_net; 133 tx_ring = r_vec->tx_ring; 134 if (!netif_running(nn->netdev)) 135 goto out; 136 137 txd_cnt = tx_ring->cnt; 138 139 d_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q); 140 d_wr_p = nfp_qcp_wr_ptr_read(tx_ring->qcp_q); 141 142 seq_printf(file, "TX[%02d]: H_RD=%d H_WR=%d D_RD=%d D_WR=%d\n", 143 tx_ring->idx, tx_ring->rd_p, tx_ring->wr_p, d_rd_p, d_wr_p); 144 145 for (i = 0; i < txd_cnt; i++) { 146 txd = &tx_ring->txds[i]; 147 seq_printf(file, "%04d: 0x%08x 0x%08x 0x%08x 0x%08x", i, 148 txd->vals[0], txd->vals[1], 149 txd->vals[2], txd->vals[3]); 150 151 skb = READ_ONCE(tx_ring->txbufs[i].skb); 152 if (skb) 153 seq_printf(file, " skb->head=%p skb->data=%p", 154 skb->head, skb->data); 155 if (tx_ring->txbufs[i].dma_addr) 156 seq_printf(file, " dma_addr=%pad", 157 &tx_ring->txbufs[i].dma_addr); 158 159 if (i == tx_ring->rd_p % txd_cnt) 160 seq_puts(file, " H_RD"); 161 if (i == tx_ring->wr_p % txd_cnt) 162 seq_puts(file, " H_WR"); 163 if (i == d_rd_p % txd_cnt) 164 seq_puts(file, " D_RD"); 165 if (i == d_wr_p % txd_cnt) 166 seq_puts(file, " D_WR"); 167 168 seq_putc(file, '\n'); 169 } 170 out: 171 rtnl_unlock(); 172 return 0; 173 } 174 175 static int nfp_net_debugfs_tx_q_open(struct inode *inode, struct file *f) 176 { 177 return single_open(f, nfp_net_debugfs_tx_q_read, inode->i_private); 178 } 179 180 static const struct file_operations nfp_tx_q_fops = { 181 .owner = THIS_MODULE, 182 .open = nfp_net_debugfs_tx_q_open, 183 .release = single_release, 184 .read = seq_read, 185 .llseek = seq_lseek 186 }; 187 188 void nfp_net_debugfs_adapter_add(struct nfp_net *nn) 189 { 190 struct dentry *queues, *tx, *rx; 191 char int_name[16]; 192 int i; 193 194 if (IS_ERR_OR_NULL(nfp_dir)) 195 return; 196 197 nn->debugfs_dir = debugfs_create_dir(pci_name(nn->pdev), nfp_dir); 198 if (IS_ERR_OR_NULL(nn->debugfs_dir)) 199 return; 200 201 /* Create queue debugging sub-tree */ 202 queues = debugfs_create_dir("queue", nn->debugfs_dir); 203 if (IS_ERR_OR_NULL(queues)) 204 return; 205 206 rx = debugfs_create_dir("rx", queues); 207 tx = debugfs_create_dir("tx", queues); 208 if (IS_ERR_OR_NULL(rx) || IS_ERR_OR_NULL(tx)) 209 return; 210 211 for (i = 0; i < nn->num_rx_rings; i++) { 212 sprintf(int_name, "%d", i); 213 debugfs_create_file(int_name, S_IRUSR, rx, 214 &nn->r_vecs[i], &nfp_rx_q_fops); 215 } 216 217 for (i = 0; i < nn->num_tx_rings; i++) { 218 sprintf(int_name, "%d", i); 219 debugfs_create_file(int_name, S_IRUSR, tx, 220 &nn->r_vecs[i], &nfp_tx_q_fops); 221 } 222 } 223 224 void nfp_net_debugfs_adapter_del(struct nfp_net *nn) 225 { 226 debugfs_remove_recursive(nn->debugfs_dir); 227 nn->debugfs_dir = NULL; 228 } 229 230 void nfp_net_debugfs_create(void) 231 { 232 nfp_dir = debugfs_create_dir("nfp_net", NULL); 233 } 234 235 void nfp_net_debugfs_destroy(void) 236 { 237 debugfs_remove_recursive(nfp_dir); 238 nfp_dir = NULL; 239 } 240