drivers/infiniband/hw/bnxt_re/debugfs.c

   1 // SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
   2 /*
   3  * Copyright (c) 2024, Broadcom. All rights reserved.  The term
   4  * Broadcom refers to Broadcom Limited and/or its subsidiaries.
   5  *
   6  * Description: Debugfs component of the bnxt_re driver
   7  */
   8
   9 #include <linux/debugfs.h>
  10 #include <linux/pci.h>
  11 #include <rdma/ib_addr.h>
  12
  13 #include "bnxt_ulp.h"
  14 #include "roce_hsi.h"
  15 #include "qplib_res.h"
  16 #include "qplib_sp.h"
  17 #include "qplib_fp.h"
  18 #include "qplib_rcfw.h"
  19 #include "bnxt_re.h"
  20 #include "ib_verbs.h"
  21 #include "debugfs.h"
  22
  23 static struct dentry *bnxt_re_debugfs_root;
  24
  25 static inline const char *bnxt_re_qp_state_str(u8 state)
  26 {
  27         switch (state) {
  28         case CMDQ_MODIFY_QP_NEW_STATE_RESET:
  29                 return "RST";
  30         case CMDQ_MODIFY_QP_NEW_STATE_INIT:
  31                 return "INIT";
  32         case CMDQ_MODIFY_QP_NEW_STATE_RTR:
  33                 return "RTR";
  34         case CMDQ_MODIFY_QP_NEW_STATE_RTS:
  35                 return "RTS";
  36         case CMDQ_MODIFY_QP_NEW_STATE_SQE:
  37                 return "SQER";
  38         case CMDQ_MODIFY_QP_NEW_STATE_SQD:
  39                 return "SQD";
  40         case CMDQ_MODIFY_QP_NEW_STATE_ERR:
  41                 return "ERR";
  42         default:
  43                 return "Invalid QP state";
  44         }
  45 }
  46
  47 static inline const char *bnxt_re_qp_type_str(u8 type)
  48 {
  49         switch (type) {
  50         case CMDQ_CREATE_QP1_TYPE_GSI: return "QP1";
  51         case CMDQ_CREATE_QP_TYPE_GSI: return "QP1";
  52         case CMDQ_CREATE_QP_TYPE_RC: return "RC";
  53         case CMDQ_CREATE_QP_TYPE_UD: return "UD";
  54         case CMDQ_CREATE_QP_TYPE_RAW_ETHERTYPE: return "RAW_ETHERTYPE";
  55         default: return "Invalid transport type";
  56         }
  57 }
  58
  59 static ssize_t qp_info_read(struct file *filep,
  60                             char __user *buffer,
  61                             size_t count, loff_t *ppos)
  62 {
  63         struct bnxt_re_qp *qp = filep->private_data;
  64         char *buf;
  65         int len;
  66
  67         if (*ppos)
  68                 return 0;
  69
  70         buf = kasprintf(GFP_KERNEL,
  71                         "QPN\t\t: %d\n"
  72                         "transport\t: %s\n"
  73                         "state\t\t: %s\n"
  74                         "mtu\t\t: %d\n"
  75                         "timeout\t\t: %d\n"
  76                         "remote QPN\t: %d\n",
  77                         qp->qplib_qp.id,
  78                         bnxt_re_qp_type_str(qp->qplib_qp.type),
  79                         bnxt_re_qp_state_str(qp->qplib_qp.state),
  80                         qp->qplib_qp.mtu,
  81                         qp->qplib_qp.timeout,
  82                         qp->qplib_qp.dest_qpn);
  83         if (!buf)
  84                 return -ENOMEM;
  85         if (count < strlen(buf)) {
  86                 kfree(buf);
  87                 return -ENOSPC;
  88         }
  89         len = simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf));
  90         kfree(buf);
  91         return len;
  92 }
  93
  94 static const struct file_operations debugfs_qp_fops = {
  95         .owner = THIS_MODULE,
  96         .open = simple_open,
  97         .read = qp_info_read,
  98 };
  99
 100 void bnxt_re_debug_add_qpinfo(struct bnxt_re_dev *rdev, struct bnxt_re_qp *qp)
 101 {
 102         char resn[32];
 103
 104         sprintf(resn, "0x%x", qp->qplib_qp.id);
 105         qp->dentry = debugfs_create_file(resn, 0400, rdev->qp_debugfs, qp, &debugfs_qp_fops);
 106 }
 107
 108 void bnxt_re_debug_rem_qpinfo(struct bnxt_re_dev *rdev, struct bnxt_re_qp *qp)
 109 {
 110         debugfs_remove(qp->dentry);
 111 }
 112
 113 void bnxt_re_debugfs_add_pdev(struct bnxt_re_dev *rdev)
 114 {
 115         struct pci_dev *pdev = rdev->en_dev->pdev;
 116
 117         rdev->dbg_root = debugfs_create_dir(dev_name(&pdev->dev), bnxt_re_debugfs_root);
 118
 119         rdev->qp_debugfs = debugfs_create_dir("QPs", rdev->dbg_root);
 120 }
 121
 122 void bnxt_re_debugfs_rem_pdev(struct bnxt_re_dev *rdev)
 123 {
 124         debugfs_remove_recursive(rdev->qp_debugfs);
 125
 126         debugfs_remove_recursive(rdev->dbg_root);
 127         rdev->dbg_root = NULL;
 128 }
 129
 130 void bnxt_re_register_debugfs(void)
 131 {
 132         bnxt_re_debugfs_root = debugfs_create_dir("bnxt_re", NULL);
 133 }
 134
 135 void bnxt_re_unregister_debugfs(void)
 136 {
 137         debugfs_remove(bnxt_re_debugfs_root);
 138 }