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 18 static struct dentry *bnxt_debug_mnt; 19 20 static 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 58 static const struct file_operations debugfs_dim_fops = { 59 .owner = THIS_MODULE, 60 .open = simple_open, 61 .read = debugfs_dim_read, 62 }; 63 64 static 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 74 void 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 } 105 106 void 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 } 113 114 void 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 } 120 121 void bnxt_debug_exit(void) 122 { 123 debugfs_remove_recursive(bnxt_debug_mnt); 124 } 125