drivers/net/ethernet/huawei/hinic/hinic_debugfs.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /* Huawei HiNIC PCI Express Linux driver
   3  * Copyright(c) 2017 Huawei Technologies Co., Ltd
   4  */
   5
   6 #include <linux/debugfs.h>
   7 #include <linux/device.h>
   8
   9 #include "hinic_debugfs.h"
  10
  11 static struct dentry *hinic_dbgfs_root;
  12
  13 enum sq_dbg_info {
  14         GLB_SQ_ID,
  15         SQ_PI,
  16         SQ_CI,
  17         SQ_FI,
  18         SQ_MSIX_ENTRY,
  19 };
  20
  21 static char *sq_fields[] = {"glb_sq_id", "sq_pi", "sq_ci", "sq_fi", "sq_msix_entry"};
  22
  23 static u64 hinic_dbg_get_sq_info(struct hinic_dev *nic_dev, struct hinic_sq *sq, int idx)
  24 {
  25         struct hinic_wq *wq = sq->wq;
  26
  27         switch (idx) {
  28         case GLB_SQ_ID:
  29                 return nic_dev->hwdev->func_to_io.global_qpn + sq->qid;
  30         case SQ_PI:
  31                 return atomic_read(&wq->prod_idx) & wq->mask;
  32         case SQ_CI:
  33                 return atomic_read(&wq->cons_idx) & wq->mask;
  34         case SQ_FI:
  35                 return be16_to_cpu(*(__be16 *)(sq->hw_ci_addr)) & wq->mask;
  36         case SQ_MSIX_ENTRY:
  37                 return sq->msix_entry;
  38         }
  39
  40         return 0;
  41 }
  42
  43 enum rq_dbg_info {
  44         GLB_RQ_ID,
  45         RQ_HW_PI,
  46         RQ_SW_CI,
  47         RQ_SW_PI,
  48         RQ_MSIX_ENTRY,
  49 };
  50
  51 static char *rq_fields[] = {"glb_rq_id", "rq_hw_pi", "rq_sw_ci", "rq_sw_pi", "rq_msix_entry"};
  52
  53 static u64 hinic_dbg_get_rq_info(struct hinic_dev *nic_dev, struct hinic_rq *rq, int idx)
  54 {
  55         struct hinic_wq *wq = rq->wq;
  56
  57         switch (idx) {
  58         case GLB_RQ_ID:
  59                 return nic_dev->hwdev->func_to_io.global_qpn + rq->qid;
  60         case RQ_HW_PI:
  61                 return be16_to_cpu(*(__be16 *)(rq->pi_virt_addr)) & wq->mask;
  62         case RQ_SW_CI:
  63                 return atomic_read(&wq->cons_idx) & wq->mask;
  64         case RQ_SW_PI:
  65                 return atomic_read(&wq->prod_idx) & wq->mask;
  66         case RQ_MSIX_ENTRY:
  67                 return rq->msix_entry;
  68         }
  69
  70         return 0;
  71 }
  72
  73 enum func_tbl_info {
  74         VALID,
  75         RX_MODE,
  76         MTU,
  77         RQ_DEPTH,
  78         QUEUE_NUM,
  79 };
  80
  81 static char *func_table_fields[] = {"valid", "rx_mode", "mtu", "rq_depth", "cfg_q_num"};
  82
  83 static int hinic_dbg_get_func_table(struct hinic_dev *nic_dev, int idx)
  84 {
  85         struct tag_sml_funcfg_tbl *funcfg_table_elem;
  86         struct hinic_cmd_lt_rd *read_data;
  87         u16 out_size = sizeof(*read_data);
  88         int err;
  89
  90         read_data = kzalloc(sizeof(*read_data), GFP_KERNEL);
  91         if (!read_data)
  92                 return ~0;
  93
  94         read_data->node = TBL_ID_FUNC_CFG_SM_NODE;
  95         read_data->inst = TBL_ID_FUNC_CFG_SM_INST;
  96         read_data->entry_size = HINIC_FUNCTION_CONFIGURE_TABLE_SIZE;
  97         read_data->lt_index = HINIC_HWIF_FUNC_IDX(nic_dev->hwdev->hwif);
  98         read_data->len = HINIC_FUNCTION_CONFIGURE_TABLE_SIZE;
  99
 100         err = hinic_port_msg_cmd(nic_dev->hwdev, HINIC_PORT_CMD_RD_LINE_TBL, read_data,
 101                                  sizeof(*read_data), read_data, &out_size);
 102         if (err || out_size != sizeof(*read_data) || read_data->status) {
 103                 netif_err(nic_dev, drv, nic_dev->netdev,
 104                           "Failed to get func table, err: %d, status: 0x%x, out size: 0x%x\n",
 105                           err, read_data->status, out_size);
 106                 kfree(read_data);
 107                 return ~0;
 108         }
 109
 110         funcfg_table_elem = (struct tag_sml_funcfg_tbl *)read_data->data;
 111
 112         switch (idx) {
 113         case VALID:
 114                 return funcfg_table_elem->dw0.bs.valid;
 115         case RX_MODE:
 116                 return funcfg_table_elem->dw0.bs.nic_rx_mode;
 117         case MTU:
 118                 return funcfg_table_elem->dw1.bs.mtu;
 119         case RQ_DEPTH:
 120                 return funcfg_table_elem->dw13.bs.cfg_rq_depth;
 121         case QUEUE_NUM:
 122                 return funcfg_table_elem->dw13.bs.cfg_q_num;
 123         }
 124
 125         kfree(read_data);
 126
 127         return ~0;
 128 }
 129
 130 static ssize_t hinic_dbg_cmd_read(struct file *filp, char __user *buffer, size_t count,
 131                                   loff_t *ppos)
 132 {
 133         struct hinic_debug_priv *dbg;
 134         char ret_buf[20];
 135         int *desc;
 136         u64 out;
 137         int ret;
 138
 139         desc = filp->private_data;
 140         dbg = container_of(desc, struct hinic_debug_priv, field_id[*desc]);
 141
 142         switch (dbg->type) {
 143         case HINIC_DBG_SQ_INFO:
 144                 out = hinic_dbg_get_sq_info(dbg->dev, dbg->object, *desc);
 145                 break;
 146
 147         case HINIC_DBG_RQ_INFO:
 148                 out = hinic_dbg_get_rq_info(dbg->dev, dbg->object, *desc);
 149                 break;
 150
 151         case HINIC_DBG_FUNC_TABLE:
 152                 out = hinic_dbg_get_func_table(dbg->dev, *desc);
 153                 break;
 154
 155         default:
 156                 netif_warn(dbg->dev, drv, dbg->dev->netdev, "Invalid hinic debug cmd: %d\n",
 157                            dbg->type);
 158                 return -EINVAL;
 159         }
 160
 161         ret = snprintf(ret_buf, sizeof(ret_buf), "0x%llx\n", out);
 162
 163         return simple_read_from_buffer(buffer, count, ppos, ret_buf, ret);
 164 }
 165
 166 static const struct file_operations hinic_dbg_cmd_fops = {
 167         .owner = THIS_MODULE,
 168         .open  = simple_open,
 169         .read  = hinic_dbg_cmd_read,
 170 };
 171
 172 static int create_dbg_files(struct hinic_dev *dev, enum hinic_dbg_type type, void *data,
 173                             struct dentry *root, struct hinic_debug_priv **dbg, char **field,
 174                             int nfile)
 175 {
 176         struct hinic_debug_priv *tmp;
 177         int i;
 178
 179         tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
 180         if (!tmp)
 181                 return -ENOMEM;
 182
 183         tmp->dev = dev;
 184         tmp->object = data;
 185         tmp->type = type;
 186         tmp->root = root;
 187
 188         for (i = 0; i < nfile; i++) {
 189                 tmp->field_id[i] = i;
 190                 debugfs_create_file(field[i], 0400, root, &tmp->field_id[i], &hinic_dbg_cmd_fops);
 191         }
 192
 193         *dbg = tmp;
 194
 195         return 0;
 196 }
 197
 198 static void rem_dbg_files(struct hinic_debug_priv *dbg)
 199 {
 200         if (dbg->type != HINIC_DBG_FUNC_TABLE)
 201                 debugfs_remove_recursive(dbg->root);
 202
 203         kfree(dbg);
 204 }
 205
 206 int hinic_sq_debug_add(struct hinic_dev *dev, u16 sq_id)
 207 {
 208         struct hinic_sq *sq;
 209         struct dentry *root;
 210         char sub_dir[16];
 211
 212         sq = dev->txqs[sq_id].sq;
 213
 214         sprintf(sub_dir, "0x%x", sq_id);
 215
 216         root = debugfs_create_dir(sub_dir, dev->sq_dbgfs);
 217
 218         return create_dbg_files(dev, HINIC_DBG_SQ_INFO, sq, root, &sq->dbg, sq_fields,
 219                                 ARRAY_SIZE(sq_fields));
 220 }
 221
 222 void hinic_sq_debug_rem(struct hinic_sq *sq)
 223 {
 224         if (sq->dbg)
 225                 rem_dbg_files(sq->dbg);
 226 }
 227
 228 int hinic_rq_debug_add(struct hinic_dev *dev, u16 rq_id)
 229 {
 230         struct hinic_rq *rq;
 231         struct dentry *root;
 232         char sub_dir[16];
 233
 234         rq = dev->rxqs[rq_id].rq;
 235
 236         sprintf(sub_dir, "0x%x", rq_id);
 237
 238         root = debugfs_create_dir(sub_dir, dev->rq_dbgfs);
 239
 240         return create_dbg_files(dev, HINIC_DBG_RQ_INFO, rq, root, &rq->dbg, rq_fields,
 241                                 ARRAY_SIZE(rq_fields));
 242 }
 243
 244 void hinic_rq_debug_rem(struct hinic_rq *rq)
 245 {
 246         if (rq->dbg)
 247                 rem_dbg_files(rq->dbg);
 248 }
 249
 250 int hinic_func_table_debug_add(struct hinic_dev *dev)
 251 {
 252         if (HINIC_IS_VF(dev->hwdev->hwif))
 253                 return 0;
 254
 255         return create_dbg_files(dev, HINIC_DBG_FUNC_TABLE, dev, dev->func_tbl_dbgfs, &dev->dbg,
 256                                 func_table_fields, ARRAY_SIZE(func_table_fields));
 257 }
 258
 259 void hinic_func_table_debug_rem(struct hinic_dev *dev)
 260 {
 261         if (!HINIC_IS_VF(dev->hwdev->hwif) && dev->dbg)
 262                 rem_dbg_files(dev->dbg);
 263 }
 264
 265 void hinic_sq_dbgfs_init(struct hinic_dev *nic_dev)
 266 {
 267         nic_dev->sq_dbgfs = debugfs_create_dir("SQs", nic_dev->dbgfs_root);
 268 }
 269
 270 void hinic_sq_dbgfs_uninit(struct hinic_dev *nic_dev)
 271 {
 272         debugfs_remove_recursive(nic_dev->sq_dbgfs);
 273 }
 274
 275 void hinic_rq_dbgfs_init(struct hinic_dev *nic_dev)
 276 {
 277         nic_dev->rq_dbgfs = debugfs_create_dir("RQs", nic_dev->dbgfs_root);
 278 }
 279
 280 void hinic_rq_dbgfs_uninit(struct hinic_dev *nic_dev)
 281 {
 282         debugfs_remove_recursive(nic_dev->rq_dbgfs);
 283 }
 284
 285 void hinic_func_tbl_dbgfs_init(struct hinic_dev *nic_dev)
 286 {
 287         if (!HINIC_IS_VF(nic_dev->hwdev->hwif))
 288                 nic_dev->func_tbl_dbgfs = debugfs_create_dir("func_table", nic_dev->dbgfs_root);
 289 }
 290
 291 void hinic_func_tbl_dbgfs_uninit(struct hinic_dev *nic_dev)
 292 {
 293         if (!HINIC_IS_VF(nic_dev->hwdev->hwif))
 294                 debugfs_remove_recursive(nic_dev->func_tbl_dbgfs);
 295 }
 296
 297 void hinic_dbg_init(struct hinic_dev *nic_dev)
 298 {
 299         nic_dev->dbgfs_root = debugfs_create_dir(pci_name(nic_dev->hwdev->hwif->pdev),
 300                                                  hinic_dbgfs_root);
 301 }
 302
 303 void hinic_dbg_uninit(struct hinic_dev *nic_dev)
 304 {
 305         debugfs_remove_recursive(nic_dev->dbgfs_root);
 306         nic_dev->dbgfs_root = NULL;
 307 }
 308
 309 void hinic_dbg_register_debugfs(const char *debugfs_dir_name)
 310 {
 311         hinic_dbgfs_root = debugfs_create_dir(debugfs_dir_name, NULL);
 312 }
 313
 314 void hinic_dbg_unregister_debugfs(void)
 315 {
 316         debugfs_remove_recursive(hinic_dbgfs_root);
 317         hinic_dbgfs_root = NULL;
 318 }