drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /* Copyright (c) 2018-2019 Hisilicon Limited. */
   3
   4 #include <linux/debugfs.h>
   5 #include <linux/device.h>
   6
   7 #include "hnae3.h"
   8 #include "hns3_enet.h"
   9
  10 #define HNS3_DBG_READ_LEN 256
  11
  12 static struct dentry *hns3_dbgfs_root;
  13
  14 static int hns3_dbg_queue_info(struct hnae3_handle *h,
  15                                const char *cmd_buf)
  16 {
  17         struct hns3_nic_priv *priv = h->priv;
  18         struct hns3_nic_ring_data *ring_data;
  19         struct hns3_enet_ring *ring;
  20         u32 base_add_l, base_add_h;
  21         u32 queue_num, queue_max;
  22         u32 value, i = 0;
  23         int cnt;
  24
  25         if (!priv->ring_data) {
  26                 dev_err(&h->pdev->dev, "ring_data is NULL\n");
  27                 return -EFAULT;
  28         }
  29
  30         queue_max = h->kinfo.num_tqps;
  31         cnt = kstrtouint(&cmd_buf[11], 0, &queue_num);
  32         if (cnt)
  33                 queue_num = 0;
  34         else
  35                 queue_max = queue_num + 1;
  36
  37         dev_info(&h->pdev->dev, "queue info\n");
  38
  39         if (queue_num >= h->kinfo.num_tqps) {
  40                 dev_err(&h->pdev->dev,
  41                         "Queue number(%u) is out of range(%u)\n", queue_num,
  42                         h->kinfo.num_tqps - 1);
  43                 return -EINVAL;
  44         }
  45
  46         ring_data = priv->ring_data;
  47         for (i = queue_num; i < queue_max; i++) {
  48                 /* Each cycle needs to determine whether the instance is reset,
  49                  * to prevent reference to invalid memory. And need to ensure
  50                  * that the following code is executed within 100ms.
  51                  */
  52                 if (!test_bit(HNS3_NIC_STATE_INITED, &priv->state) ||
  53                     test_bit(HNS3_NIC_STATE_RESETTING, &priv->state))
  54                         return -EPERM;
  55
  56                 ring = ring_data[(u32)(i + h->kinfo.num_tqps)].ring;
  57                 base_add_h = readl_relaxed(ring->tqp->io_base +
  58                                            HNS3_RING_RX_RING_BASEADDR_H_REG);
  59                 base_add_l = readl_relaxed(ring->tqp->io_base +
  60                                            HNS3_RING_RX_RING_BASEADDR_L_REG);
  61                 dev_info(&h->pdev->dev, "RX(%d) BASE ADD: 0x%08x%08x\n", i,
  62                          base_add_h, base_add_l);
  63
  64                 value = readl_relaxed(ring->tqp->io_base +
  65                                       HNS3_RING_RX_RING_BD_NUM_REG);
  66                 dev_info(&h->pdev->dev, "RX(%d) RING BD NUM: %u\n", i, value);
  67
  68                 value = readl_relaxed(ring->tqp->io_base +
  69                                       HNS3_RING_RX_RING_BD_LEN_REG);
  70                 dev_info(&h->pdev->dev, "RX(%d) RING BD LEN: %u\n", i, value);
  71
  72                 value = readl_relaxed(ring->tqp->io_base +
  73                                       HNS3_RING_RX_RING_TAIL_REG);
  74                 dev_info(&h->pdev->dev, "RX(%d) RING TAIL: %u\n", i, value);
  75
  76                 value = readl_relaxed(ring->tqp->io_base +
  77                                       HNS3_RING_RX_RING_HEAD_REG);
  78                 dev_info(&h->pdev->dev, "RX(%d) RING HEAD: %u\n", i, value);
  79
  80                 value = readl_relaxed(ring->tqp->io_base +
  81                                       HNS3_RING_RX_RING_FBDNUM_REG);
  82                 dev_info(&h->pdev->dev, "RX(%d) RING FBDNUM: %u\n", i, value);
  83
  84                 value = readl_relaxed(ring->tqp->io_base +
  85                                       HNS3_RING_RX_RING_PKTNUM_RECORD_REG);
  86                 dev_info(&h->pdev->dev, "RX(%d) RING PKTNUM: %u\n", i, value);
  87
  88                 ring = ring_data[i].ring;
  89                 base_add_h = readl_relaxed(ring->tqp->io_base +
  90                                            HNS3_RING_TX_RING_BASEADDR_H_REG);
  91                 base_add_l = readl_relaxed(ring->tqp->io_base +
  92                                            HNS3_RING_TX_RING_BASEADDR_L_REG);
  93                 dev_info(&h->pdev->dev, "TX(%d) BASE ADD: 0x%08x%08x\n", i,
  94                          base_add_h, base_add_l);
  95
  96                 value = readl_relaxed(ring->tqp->io_base +
  97                                       HNS3_RING_TX_RING_BD_NUM_REG);
  98                 dev_info(&h->pdev->dev, "TX(%d) RING BD NUM: %u\n", i, value);
  99
 100                 value = readl_relaxed(ring->tqp->io_base +
 101                                       HNS3_RING_TX_RING_TC_REG);
 102                 dev_info(&h->pdev->dev, "TX(%d) RING TC: %u\n", i, value);
 103
 104                 value = readl_relaxed(ring->tqp->io_base +
 105                                       HNS3_RING_TX_RING_TAIL_REG);
 106                 dev_info(&h->pdev->dev, "TX(%d) RING TAIL: %u\n", i, value);
 107
 108                 value = readl_relaxed(ring->tqp->io_base +
 109                                       HNS3_RING_TX_RING_HEAD_REG);
 110                 dev_info(&h->pdev->dev, "TX(%d) RING HEAD: %u\n", i, value);
 111
 112                 value = readl_relaxed(ring->tqp->io_base +
 113                                       HNS3_RING_TX_RING_FBDNUM_REG);
 114                 dev_info(&h->pdev->dev, "TX(%d) RING FBDNUM: %u\n", i, value);
 115
 116                 value = readl_relaxed(ring->tqp->io_base +
 117                                       HNS3_RING_TX_RING_OFFSET_REG);
 118                 dev_info(&h->pdev->dev, "TX(%d) RING OFFSET: %u\n", i, value);
 119
 120                 value = readl_relaxed(ring->tqp->io_base +
 121                                       HNS3_RING_TX_RING_PKTNUM_RECORD_REG);
 122                 dev_info(&h->pdev->dev, "TX(%d) RING PKTNUM: %u\n\n", i,
 123                          value);
 124         }
 125
 126         return 0;
 127 }
 128
 129 static int hns3_dbg_queue_map(struct hnae3_handle *h)
 130 {
 131         struct hns3_nic_priv *priv = h->priv;
 132         struct hns3_nic_ring_data *ring_data;
 133         int i;
 134
 135         if (!h->ae_algo->ops->get_global_queue_id)
 136                 return -EOPNOTSUPP;
 137
 138         dev_info(&h->pdev->dev, "map info for queue id and vector id\n");
 139         dev_info(&h->pdev->dev,
 140                  "local queue id | global queue id | vector id\n");
 141         for (i = 0; i < h->kinfo.num_tqps; i++) {
 142                 u16 global_qid;
 143
 144                 global_qid = h->ae_algo->ops->get_global_queue_id(h, i);
 145                 ring_data = &priv->ring_data[i];
 146                 if (!ring_data || !ring_data->ring ||
 147                     !ring_data->ring->tqp_vector)
 148                         continue;
 149
 150                 dev_info(&h->pdev->dev,
 151                          "      %4d            %4d            %4d\n",
 152                          i, global_qid,
 153                          ring_data->ring->tqp_vector->vector_irq);
 154         }
 155
 156         return 0;
 157 }
 158
 159 static int hns3_dbg_bd_info(struct hnae3_handle *h, const char *cmd_buf)
 160 {
 161         struct hns3_nic_priv *priv = h->priv;
 162         struct hns3_nic_ring_data *ring_data;
 163         struct hns3_desc *rx_desc, *tx_desc;
 164         struct device *dev = &h->pdev->dev;
 165         struct hns3_enet_ring *ring;
 166         u32 tx_index, rx_index;
 167         u32 q_num, value;
 168         int cnt;
 169
 170         cnt = sscanf(&cmd_buf[8], "%u %u", &q_num, &tx_index);
 171         if (cnt == 2) {
 172                 rx_index = tx_index;
 173         } else if (cnt != 1) {
 174                 dev_err(dev, "bd info: bad command string, cnt=%d\n", cnt);
 175                 return -EINVAL;
 176         }
 177
 178         if (q_num >= h->kinfo.num_tqps) {
 179                 dev_err(dev, "Queue number(%u) is out of range(%u)\n", q_num,
 180                         h->kinfo.num_tqps - 1);
 181                 return -EINVAL;
 182         }
 183
 184         ring_data = priv->ring_data;
 185         ring  = ring_data[q_num].ring;
 186         value = readl_relaxed(ring->tqp->io_base + HNS3_RING_TX_RING_TAIL_REG);
 187         tx_index = (cnt == 1) ? value : tx_index;
 188
 189         if (tx_index >= ring->desc_num) {
 190                 dev_err(dev, "bd index (%u) is out of range(%u)\n", tx_index,
 191                         ring->desc_num - 1);
 192                 return -EINVAL;
 193         }
 194
 195         tx_desc = &ring->desc[tx_index];
 196         dev_info(dev, "TX Queue Num: %u, BD Index: %u\n", q_num, tx_index);
 197         dev_info(dev, "(TX) addr: 0x%llx\n", tx_desc->addr);
 198         dev_info(dev, "(TX)vlan_tag: %u\n", tx_desc->tx.vlan_tag);
 199         dev_info(dev, "(TX)send_size: %u\n", tx_desc->tx.send_size);
 200         dev_info(dev, "(TX)vlan_tso: %u\n", tx_desc->tx.type_cs_vlan_tso);
 201         dev_info(dev, "(TX)l2_len: %u\n", tx_desc->tx.l2_len);
 202         dev_info(dev, "(TX)l3_len: %u\n", tx_desc->tx.l3_len);
 203         dev_info(dev, "(TX)l4_len: %u\n", tx_desc->tx.l4_len);
 204         dev_info(dev, "(TX)vlan_tag: %u\n", tx_desc->tx.outer_vlan_tag);
 205         dev_info(dev, "(TX)tv: %u\n", tx_desc->tx.tv);
 206         dev_info(dev, "(TX)vlan_msec: %u\n", tx_desc->tx.ol_type_vlan_msec);
 207         dev_info(dev, "(TX)ol2_len: %u\n", tx_desc->tx.ol2_len);
 208         dev_info(dev, "(TX)ol3_len: %u\n", tx_desc->tx.ol3_len);
 209         dev_info(dev, "(TX)ol4_len: %u\n", tx_desc->tx.ol4_len);
 210         dev_info(dev, "(TX)paylen: %u\n", tx_desc->tx.paylen);
 211         dev_info(dev, "(TX)vld_ra_ri: %u\n", tx_desc->tx.bdtp_fe_sc_vld_ra_ri);
 212         dev_info(dev, "(TX)mss: %u\n", tx_desc->tx.mss);
 213
 214         ring  = ring_data[q_num + h->kinfo.num_tqps].ring;
 215         value = readl_relaxed(ring->tqp->io_base + HNS3_RING_RX_RING_TAIL_REG);
 216         rx_index = (cnt == 1) ? value : tx_index;
 217         rx_desc  = &ring->desc[rx_index];
 218
 219         dev_info(dev, "RX Queue Num: %u, BD Index: %u\n", q_num, rx_index);
 220         dev_info(dev, "(RX)addr: 0x%llx\n", rx_desc->addr);
 221         dev_info(dev, "(RX)pkt_len: %u\n", rx_desc->rx.pkt_len);
 222         dev_info(dev, "(RX)size: %u\n", rx_desc->rx.size);
 223         dev_info(dev, "(RX)rss_hash: %u\n", rx_desc->rx.rss_hash);
 224         dev_info(dev, "(RX)fd_id: %u\n", rx_desc->rx.fd_id);
 225         dev_info(dev, "(RX)vlan_tag: %u\n", rx_desc->rx.vlan_tag);
 226         dev_info(dev, "(RX)o_dm_vlan_id_fb: %u\n", rx_desc->rx.o_dm_vlan_id_fb);
 227         dev_info(dev, "(RX)ot_vlan_tag: %u\n", rx_desc->rx.ot_vlan_tag);
 228         dev_info(dev, "(RX)bd_base_info: %u\n", rx_desc->rx.bd_base_info);
 229
 230         return 0;
 231 }
 232
 233 static void hns3_dbg_help(struct hnae3_handle *h)
 234 {
 235 #define HNS3_DBG_BUF_LEN 256
 236
 237         char printf_buf[HNS3_DBG_BUF_LEN];
 238
 239         dev_info(&h->pdev->dev, "available commands\n");
 240         dev_info(&h->pdev->dev, "queue info [number]\n");
 241         dev_info(&h->pdev->dev, "queue map\n");
 242         dev_info(&h->pdev->dev, "bd info [q_num] <bd index>\n");
 243
 244         if (!hns3_is_phys_func(h->pdev))
 245                 return;
 246
 247         dev_info(&h->pdev->dev, "dump fd tcam\n");
 248         dev_info(&h->pdev->dev, "dump tc\n");
 249         dev_info(&h->pdev->dev, "dump tm map [q_num]\n");
 250         dev_info(&h->pdev->dev, "dump tm\n");
 251         dev_info(&h->pdev->dev, "dump qos pause cfg\n");
 252         dev_info(&h->pdev->dev, "dump qos pri map\n");
 253         dev_info(&h->pdev->dev, "dump qos buf cfg\n");
 254         dev_info(&h->pdev->dev, "dump mng tbl\n");
 255         dev_info(&h->pdev->dev, "dump reset info\n");
 256         dev_info(&h->pdev->dev, "dump m7 info\n");
 257         dev_info(&h->pdev->dev, "dump ncl_config <offset> <length>(in hex)\n");
 258         dev_info(&h->pdev->dev, "dump mac tnl status\n");
 259
 260         memset(printf_buf, 0, HNS3_DBG_BUF_LEN);
 261         strncat(printf_buf, "dump reg [[bios common] [ssu <prt_id>]",
 262                 HNS3_DBG_BUF_LEN - 1);
 263         strncat(printf_buf + strlen(printf_buf),
 264                 " [igu egu <prt_id>] [rpu <tc_queue_num>]",
 265                 HNS3_DBG_BUF_LEN - strlen(printf_buf) - 1);
 266         strncat(printf_buf + strlen(printf_buf),
 267                 " [rtc] [ppp] [rcb] [tqp <q_num>]]\n",
 268                 HNS3_DBG_BUF_LEN - strlen(printf_buf) - 1);
 269         dev_info(&h->pdev->dev, "%s", printf_buf);
 270
 271         memset(printf_buf, 0, HNS3_DBG_BUF_LEN);
 272         strncat(printf_buf, "dump reg dcb [port_id] [pri_id] [pg_id]",
 273                 HNS3_DBG_BUF_LEN - 1);
 274         strncat(printf_buf + strlen(printf_buf), " [rq_id] [nq_id] [qset_id]\n",
 275                 HNS3_DBG_BUF_LEN - strlen(printf_buf) - 1);
 276         dev_info(&h->pdev->dev, "%s", printf_buf);
 277 }
 278
 279 static ssize_t hns3_dbg_cmd_read(struct file *filp, char __user *buffer,
 280                                  size_t count, loff_t *ppos)
 281 {
 282         int uncopy_bytes;
 283         char *buf;
 284         int len;
 285
 286         if (*ppos != 0)
 287                 return 0;
 288
 289         if (count < HNS3_DBG_READ_LEN)
 290                 return -ENOSPC;
 291
 292         buf = kzalloc(HNS3_DBG_READ_LEN, GFP_KERNEL);
 293         if (!buf)
 294                 return -ENOMEM;
 295
 296         len = snprintf(buf, HNS3_DBG_READ_LEN, "%s\n",
 297                        "Please echo help to cmd to get help information");
 298         uncopy_bytes = copy_to_user(buffer, buf, len);
 299
 300         kfree(buf);
 301
 302         if (uncopy_bytes)
 303                 return -EFAULT;
 304
 305         return (*ppos = len);
 306 }
 307
 308 static ssize_t hns3_dbg_cmd_write(struct file *filp, const char __user *buffer,
 309                                   size_t count, loff_t *ppos)
 310 {
 311         struct hnae3_handle *handle = filp->private_data;
 312         struct hns3_nic_priv *priv  = handle->priv;
 313         char *cmd_buf, *cmd_buf_tmp;
 314         int uncopied_bytes;
 315         int ret = 0;
 316
 317         if (*ppos != 0)
 318                 return 0;
 319
 320         /* Judge if the instance is being reset. */
 321         if (!test_bit(HNS3_NIC_STATE_INITED, &priv->state) ||
 322             test_bit(HNS3_NIC_STATE_RESETTING, &priv->state))
 323                 return 0;
 324
 325         cmd_buf = kzalloc(count + 1, GFP_KERNEL);
 326         if (!cmd_buf)
 327                 return count;
 328
 329         uncopied_bytes = copy_from_user(cmd_buf, buffer, count);
 330         if (uncopied_bytes) {
 331                 kfree(cmd_buf);
 332                 return -EFAULT;
 333         }
 334
 335         cmd_buf[count] = '\0';
 336
 337         cmd_buf_tmp = strchr(cmd_buf, '\n');
 338         if (cmd_buf_tmp) {
 339                 *cmd_buf_tmp = '\0';
 340                 count = cmd_buf_tmp - cmd_buf + 1;
 341         }
 342
 343         if (strncmp(cmd_buf, "help", 4) == 0)
 344                 hns3_dbg_help(handle);
 345         else if (strncmp(cmd_buf, "queue info", 10) == 0)
 346                 ret = hns3_dbg_queue_info(handle, cmd_buf);
 347         else if (strncmp(cmd_buf, "queue map", 9) == 0)
 348                 ret = hns3_dbg_queue_map(handle);
 349         else if (strncmp(cmd_buf, "bd info", 7) == 0)
 350                 ret = hns3_dbg_bd_info(handle, cmd_buf);
 351         else if (handle->ae_algo->ops->dbg_run_cmd)
 352                 ret = handle->ae_algo->ops->dbg_run_cmd(handle, cmd_buf);
 353         else
 354                 ret = -EOPNOTSUPP;
 355
 356         if (ret)
 357                 hns3_dbg_help(handle);
 358
 359         kfree(cmd_buf);
 360         cmd_buf = NULL;
 361
 362         return count;
 363 }
 364
 365 static const struct file_operations hns3_dbg_cmd_fops = {
 366         .owner = THIS_MODULE,
 367         .open  = simple_open,
 368         .read  = hns3_dbg_cmd_read,
 369         .write = hns3_dbg_cmd_write,
 370 };
 371
 372 void hns3_dbg_init(struct hnae3_handle *handle)
 373 {
 374         const char *name = pci_name(handle->pdev);
 375         struct dentry *pfile;
 376
 377         handle->hnae3_dbgfs = debugfs_create_dir(name, hns3_dbgfs_root);
 378         if (!handle->hnae3_dbgfs)
 379                 return;
 380
 381         pfile = debugfs_create_file("cmd", 0600, handle->hnae3_dbgfs, handle,
 382                                     &hns3_dbg_cmd_fops);
 383         if (!pfile) {
 384                 debugfs_remove_recursive(handle->hnae3_dbgfs);
 385                 handle->hnae3_dbgfs = NULL;
 386                 dev_warn(&handle->pdev->dev, "create file for %s fail\n",
 387                          name);
 388         }
 389 }
 390
 391 void hns3_dbg_uninit(struct hnae3_handle *handle)
 392 {
 393         debugfs_remove_recursive(handle->hnae3_dbgfs);
 394         handle->hnae3_dbgfs = NULL;
 395 }
 396
 397 void hns3_dbg_register_debugfs(const char *debugfs_dir_name)
 398 {
 399         hns3_dbgfs_root = debugfs_create_dir(debugfs_dir_name, NULL);
 400         if (!hns3_dbgfs_root) {
 401                 pr_warn("Register debugfs for %s fail\n", debugfs_dir_name);
 402                 return;
 403         }
 404 }
 405
 406 void hns3_dbg_unregister_debugfs(void)
 407 {
 408         debugfs_remove_recursive(hns3_dbgfs_root);
 409         hns3_dbgfs_root = NULL;
 410 }