broadcom/bnxt/bnxt_debugfs.c

0001 /* Broadcom NetXtreme-C/E network driver.
0002  *
0003  * Copyright (c) 2017-2018 Broadcom Limited
0004  *
0005  * This program is free software; you can redistribute it and/or modify
0006  * it under the terms of the GNU General Public License as published by
0007  * the Free Software Foundation.
0008  */
0009
0010 #include <linux/debugfs.h>
0011 #include <linux/module.h>
0012 #include <linux/pci.h>
0013 #include "bnxt_hsi.h"
0014 #include <linux/dim.h>
0015 #include "bnxt.h"
0016 #include "bnxt_debugfs.h"
0017
0018 static struct dentry *bnxt_debug_mnt;
0019
0020 static ssize_t debugfs_dim_read(struct file *filep,
0021                 char __user *buffer,
0022                 size_t count, loff_t *ppos)
0023 {
0024     struct dim *dim = filep->private_data;
0025     int len;
0026     char *buf;
0027
0028     if (*ppos)
0029         return 0;
0030     if (!dim)
0031         return -ENODEV;
0032     buf = kasprintf(GFP_KERNEL,
0033             "state = %d\n" \
0034             "profile_ix = %d\n" \
0035             "mode = %d\n" \
0036             "tune_state = %d\n" \
0037             "steps_right = %d\n" \
0038             "steps_left = %d\n" \
0039             "tired = %d\n",
0040             dim->state,
0041             dim->profile_ix,
0042             dim->mode,
0043             dim->tune_state,
0044             dim->steps_right,
0045             dim->steps_left,
0046             dim->tired);
0047     if (!buf)
0048         return -ENOMEM;
0049     if (count < strlen(buf)) {
0050         kfree(buf);
0051         return -ENOSPC;
0052     }
0053     len = simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf));
0054     kfree(buf);
0055     return len;
0056 }
0057
0058 static const struct file_operations debugfs_dim_fops = {
0059     .owner = THIS_MODULE,
0060     .open = simple_open,
0061     .read = debugfs_dim_read,
0062 };
0063
0064 static void debugfs_dim_ring_init(struct dim *dim, int ring_idx,
0065                   struct dentry *dd)
0066 {
0067     static char qname[16];
0068
0069     snprintf(qname, 10, "%d", ring_idx);
0070     debugfs_create_file(qname, 0600, dd, dim, &debugfs_dim_fops);
0071 }
0072
0073 void bnxt_debug_dev_init(struct bnxt *bp)
0074 {
0075     const char *pname = pci_name(bp->pdev);
0076     struct dentry *dir;
0077     int i;
0078
0079     bp->debugfs_pdev = debugfs_create_dir(pname, bnxt_debug_mnt);
0080     dir = debugfs_create_dir("dim", bp->debugfs_pdev);
0081
0082     /* create files for each rx ring */
0083     for (i = 0; i < bp->cp_nr_rings; i++) {
0084         struct bnxt_cp_ring_info *cpr = &bp->bnapi[i]->cp_ring;
0085
0086         if (cpr && bp->bnapi[i]->rx_ring)
0087             debugfs_dim_ring_init(&cpr->dim, i, dir);
0088     }
0089 }
0090
0091 void bnxt_debug_dev_exit(struct bnxt *bp)
0092 {
0093     if (bp) {
0094         debugfs_remove_recursive(bp->debugfs_pdev);
0095         bp->debugfs_pdev = NULL;
0096     }
0097 }
0098
0099 void bnxt_debug_init(void)
0100 {
0101     bnxt_debug_mnt = debugfs_create_dir("bnxt_en", NULL);
0102 }
0103
0104 void bnxt_debug_exit(void)
0105 {
0106     debugfs_remove_recursive(bnxt_debug_mnt);
0107 }