LXR linux/drivers/net/ethernet/broadcom/bnxt/bnxt

   1/* Broadcom NetXtreme-C/E network driver.
   2 *
   3 * Copyright (c) 2017-2018 Broadcom Limited
   4 *
   5 * This program is free software; you can redistribute it and/or modify
   6 * it under the terms of the GNU General Public License as published by
   7 * the Free Software Foundation.
   8 */
   9
  10#include <linux/debugfs.h>
  11#include <linux/module.h>
  12#include <linux/pci.h>
  13#include "bnxt_hsi.h"
  14#include <linux/net_dim.h>
  15#include "bnxt.h"
  16#include "bnxt_debugfs.h"
  17
  18static struct dentry *bnxt_debug_mnt;
  19
  20static ssize_t debugfs_dim_read(struct file *filep,
  21                                char __user *buffer,
  22                                size_t count, loff_t *ppos)
  23{
  24        struct net_dim *dim = filep->private_data;
  25        int len;
  26        char *buf;
  27
  28        if (*ppos)
  29                return 0;
  30        if (!dim)
  31                return -ENODEV;
  32        buf = kasprintf(GFP_KERNEL,
  33                        "state = %d\n" \
  34                        "profile_ix = %d\n" \
  35                        "mode = %d\n" \
  36                        "tune_state = %d\n" \
  37                        "steps_right = %d\n" \
  38                        "steps_left = %d\n" \
  39                        "tired = %d\n",
  40                        dim->state,
  41                        dim->profile_ix,
  42                        dim->mode,
  43                        dim->tune_state,
  44                        dim->steps_right,
  45                        dim->steps_left,
  46                        dim->tired);
  47        if (!buf)
  48                return -ENOMEM;
  49        if (count < strlen(buf)) {
  50                kfree(buf);
  51                return -ENOSPC;
  52        }
  53        len = simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf));
  54        kfree(buf);
  55        return len;
  56}
  57
  58static const struct file_operations debugfs_dim_fops = {
  59        .owner = THIS_MODULE,
  60        .open = simple_open,
  61        .read = debugfs_dim_read,
  62};
  63
  64static struct dentry *debugfs_dim_ring_init(struct net_dim *dim, int ring_idx,
  65                                            struct dentry *dd)
  66{
  67        static char qname[16];
  68
  69        snprintf(qname, 10, "%d", ring_idx);
  70        return debugfs_create_file(qname, 0600, dd,
  71                                   dim, &debugfs_dim_fops);
  72}
  73
  74void bnxt_debug_dev_init(struct bnxt *bp)
  75{
  76        const char *pname = pci_name(bp->pdev);
  77        struct dentry *pdevf;
  78        int i;
  79
  80        bp->debugfs_pdev = debugfs_create_dir(pname, bnxt_debug_mnt);
  81        if (bp->debugfs_pdev) {
  82                pdevf = debugfs_create_dir("dim", bp->debugfs_pdev);
  83                if (!pdevf) {
  84                        pr_err("failed to create debugfs entry %s/dim\n",
  85                               pname);
  86                        return;
  87                }
  88                bp->debugfs_dim = pdevf;
  89                /* create files for each rx ring */
  90                for (i = 0; i < bp->cp_nr_rings; i++) {
  91                        struct bnxt_cp_ring_info *cpr = &bp->bnapi[i]->cp_ring;
  92
  93                        if (cpr && bp->bnapi[i]->rx_ring) {
  94                                pdevf = debugfs_dim_ring_init(&cpr->dim, i,
  95                                                              bp->debugfs_dim);
  96                                if (!pdevf)
  97                                        pr_err("failed to create debugfs entry %s/dim/%d\n",
  98                                               pname, i);
  99                        }
 100                }
 101        } else {
 102                pr_err("failed to create debugfs entry %s\n", pname);
 103        }
 104}
 105
 106void bnxt_debug_dev_exit(struct bnxt *bp)
 107{
 108        if (bp) {
 109                debugfs_remove_recursive(bp->debugfs_pdev);
 110                bp->debugfs_pdev = NULL;
 111        }
 112}
 113
 114void bnxt_debug_init(void)
 115{
 116        bnxt_debug_mnt = debugfs_create_dir("bnxt_en", NULL);
 117        if (!bnxt_debug_mnt)
 118                pr_err("failed to init bnxt_en debugfs\n");
 119}
 120
 121void bnxt_debug_exit(void)
 122{
 123        debugfs_remove_recursive(bnxt_debug_mnt);
 124}
 125