cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

bnxt_debugfs.c (2316B)

      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/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 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 void debugfs_dim_ring_init(struct dim *dim, int ring_idx,
     65				  struct dentry *dd)
     66{
     67	static char qname[16];
     68
     69	snprintf(qname, 10, "%d", ring_idx);
     70	debugfs_create_file(qname, 0600, dd, dim, &debugfs_dim_fops);
     71}
     72
     73void bnxt_debug_dev_init(struct bnxt *bp)
     74{
     75	const char *pname = pci_name(bp->pdev);
     76	struct dentry *dir;
     77	int i;
     78
     79	bp->debugfs_pdev = debugfs_create_dir(pname, bnxt_debug_mnt);
     80	dir = debugfs_create_dir("dim", bp->debugfs_pdev);
     81
     82	/* create files for each rx ring */
     83	for (i = 0; i < bp->cp_nr_rings; i++) {
     84		struct bnxt_cp_ring_info *cpr = &bp->bnapi[i]->cp_ring;
     85
     86		if (cpr && bp->bnapi[i]->rx_ring)
     87			debugfs_dim_ring_init(&cpr->dim, i, dir);
     88	}
     89}
     90
     91void bnxt_debug_dev_exit(struct bnxt *bp)
     92{
     93	if (bp) {
     94		debugfs_remove_recursive(bp->debugfs_pdev);
     95		bp->debugfs_pdev = NULL;
     96	}
     97}
     98
     99void bnxt_debug_init(void)
    100{
    101	bnxt_debug_mnt = debugfs_create_dir("bnxt_en", NULL);
    102}
    103
    104void bnxt_debug_exit(void)
    105{
    106	debugfs_remove_recursive(bnxt_debug_mnt);
    107}