1 /* 2 * Copyright (C) 2015-2017 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 struct nfp_net_r_vector *r_vec = file->private; 44 struct nfp_net_rx_ring *rx_ring; 45 int fl_rd_p, fl_wr_p, rxd_cnt; 46 struct nfp_net_rx_desc *rxd; 47 struct nfp_net *nn; 48 void *frag; 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 (!nfp_net_running(nn)) 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 65 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", 66 rx_ring->idx, rx_ring->fl_qcidx, 67 rx_ring->cnt, &rx_ring->dma, rx_ring->rxds, 68 rx_ring->rd_p, rx_ring->wr_p, fl_rd_p, fl_wr_p); 69 70 for (i = 0; i < rxd_cnt; i++) { 71 rxd = &rx_ring->rxds[i]; 72 seq_printf(file, "%04d: 0x%08x 0x%08x", i, 73 rxd->vals[0], rxd->vals[1]); 74 75 frag = READ_ONCE(rx_ring->rxbufs[i].frag); 76 if (frag) 77 seq_printf(file, " frag=%p", frag); 78 79 if (rx_ring->rxbufs[i].dma_addr) 80 seq_printf(file, " dma_addr=%pad", 81 &rx_ring->rxbufs[i].dma_addr); 82 83 if (i == rx_ring->rd_p % rxd_cnt) 84 seq_puts(file, " H_RD "); 85 if (i == rx_ring->wr_p % rxd_cnt) 86 seq_puts(file, " H_WR "); 87 if (i == fl_rd_p % rxd_cnt) 88 seq_puts(file, " FL_RD"); 89 if (i == fl_wr_p % rxd_cnt) 90 seq_puts(file, " FL_WR"); 91 92 seq_putc(file, '\n'); 93 } 94 out: 95 rtnl_unlock(); 96 return 0; 97 } 98 99 static int nfp_net_debugfs_rx_q_open(struct inode *inode, struct file *f) 100 { 101 return single_open(f, nfp_net_debugfs_rx_q_read, inode->i_private); 102 } 103 104 static const struct file_operations nfp_rx_q_fops = { 105 .owner = THIS_MODULE, 106 .open = nfp_net_debugfs_rx_q_open, 107 .release = single_release, 108 .read = seq_read, 109 .llseek = seq_lseek 110 }; 111 112 static int nfp_net_debugfs_tx_q_open(struct inode *inode, struct file *f); 113 114 static const struct file_operations nfp_tx_q_fops = { 115 .owner = THIS_MODULE, 116 .open = nfp_net_debugfs_tx_q_open, 117 .release = single_release, 118 .read = seq_read, 119 .llseek = seq_lseek 120 }; 121 122 static int nfp_net_debugfs_tx_q_read(struct seq_file *file, void *data) 123 { 124 struct nfp_net_r_vector *r_vec = file->private; 125 struct nfp_net_tx_ring *tx_ring; 126 struct nfp_net_tx_desc *txd; 127 int d_rd_p, d_wr_p, txd_cnt; 128 struct nfp_net *nn; 129 int i; 130 131 rtnl_lock(); 132 133 if (debugfs_real_fops(file->file) == &nfp_tx_q_fops) 134 tx_ring = r_vec->tx_ring; 135 else 136 tx_ring = r_vec->xdp_ring; 137 if (!r_vec->nfp_net || !tx_ring) 138 goto out; 139 nn = r_vec->nfp_net; 140 if (!nfp_net_running(nn)) 141 goto out; 142 143 txd_cnt = tx_ring->cnt; 144 145 d_rd_p = nfp_qcp_rd_ptr_read(tx_ring->qcp_q); 146 d_wr_p = nfp_qcp_wr_ptr_read(tx_ring->qcp_q); 147 148 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\n", 149 tx_ring->idx, tx_ring->qcidx, 150 tx_ring == r_vec->tx_ring ? "" : "xdp", 151 tx_ring->cnt, &tx_ring->dma, tx_ring->txds, 152 tx_ring->rd_p, tx_ring->wr_p, d_rd_p, d_wr_p); 153 154 for (i = 0; i < txd_cnt; i++) { 155 txd = &tx_ring->txds[i]; 156 seq_printf(file, "%04d: 0x%08x 0x%08x 0x%08x 0x%08x", i, 157 txd->vals[0], txd->vals[1], 158 txd->vals[2], txd->vals[3]); 159 160 if (tx_ring == r_vec->tx_ring) { 161 struct sk_buff *skb = READ_ONCE(tx_ring->txbufs[i].skb); 162 163 if (skb) 164 seq_printf(file, " skb->head=%p skb->data=%p", 165 skb->head, skb->data); 166 } else { 167 seq_printf(file, " frag=%p", 168 READ_ONCE(tx_ring->txbufs[i].frag)); 169 } 170 171 if (tx_ring->txbufs[i].dma_addr) 172 seq_printf(file, " dma_addr=%pad", 173 &tx_ring->txbufs[i].dma_addr); 174 175 if (i == tx_ring->rd_p % txd_cnt) 176 seq_puts(file, " H_RD"); 177 if (i == tx_ring->wr_p % txd_cnt) 178 seq_puts(file, " H_WR"); 179 if (i == d_rd_p % txd_cnt) 180 seq_puts(file, " D_RD"); 181 if (i == d_wr_p % txd_cnt) 182 seq_puts(file, " D_WR"); 183 184 seq_putc(file, '\n'); 185 } 186 out: 187 rtnl_unlock(); 188 return 0; 189 } 190 191 static int nfp_net_debugfs_tx_q_open(struct inode *inode, struct file *f) 192 { 193 return single_open(f, nfp_net_debugfs_tx_q_read, inode->i_private); 194 } 195 196 static const struct file_operations nfp_xdp_q_fops = { 197 .owner = THIS_MODULE, 198 .open = nfp_net_debugfs_tx_q_open, 199 .release = single_release, 200 .read = seq_read, 201 .llseek = seq_lseek 202 }; 203 204 void nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir) 205 { 206 struct dentry *queues, *tx, *rx, *xdp; 207 char name[20]; 208 int i; 209 210 if (IS_ERR_OR_NULL(nfp_dir)) 211 return; 212 213 if (nfp_net_is_data_vnic(nn)) 214 sprintf(name, "vnic%d", nn->id); 215 else 216 strcpy(name, "ctrl-vnic"); 217 nn->debugfs_dir = debugfs_create_dir(name, ddir); 218 if (IS_ERR_OR_NULL(nn->debugfs_dir)) 219 return; 220 221 /* Create queue debugging sub-tree */ 222 queues = debugfs_create_dir("queue", nn->debugfs_dir); 223 if (IS_ERR_OR_NULL(queues)) 224 return; 225 226 rx = debugfs_create_dir("rx", queues); 227 tx = debugfs_create_dir("tx", queues); 228 xdp = debugfs_create_dir("xdp", queues); 229 if (IS_ERR_OR_NULL(rx) || IS_ERR_OR_NULL(tx) || IS_ERR_OR_NULL(xdp)) 230 return; 231 232 for (i = 0; i < min(nn->max_rx_rings, nn->max_r_vecs); i++) { 233 sprintf(name, "%d", i); 234 debugfs_create_file(name, 0400, rx, 235 &nn->r_vecs[i], &nfp_rx_q_fops); 236 debugfs_create_file(name, 0400, xdp, 237 &nn->r_vecs[i], &nfp_xdp_q_fops); 238 } 239 240 for (i = 0; i < min(nn->max_tx_rings, nn->max_r_vecs); i++) { 241 sprintf(name, "%d", i); 242 debugfs_create_file(name, 0400, tx, 243 &nn->r_vecs[i], &nfp_tx_q_fops); 244 } 245 } 246 247 struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev) 248 { 249 struct dentry *dev_dir; 250 251 if (IS_ERR_OR_NULL(nfp_dir)) 252 return NULL; 253 254 dev_dir = debugfs_create_dir(pci_name(pdev), nfp_dir); 255 if (IS_ERR_OR_NULL(dev_dir)) 256 return NULL; 257 258 return dev_dir; 259 } 260 261 void nfp_net_debugfs_dir_clean(struct dentry **dir) 262 { 263 debugfs_remove_recursive(*dir); 264 *dir = NULL; 265 } 266 267 void nfp_net_debugfs_create(void) 268 { 269 nfp_dir = debugfs_create_dir("nfp_net", NULL); 270 } 271 272 void nfp_net_debugfs_destroy(void) 273 { 274 debugfs_remove_recursive(nfp_dir); 275 nfp_dir = NULL; 276 } 277