| 1 | /* |
| 2 | * Ralink SoC ethernet driver debugfs code |
| 3 | * |
| 4 | * Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License version 2 as published |
| 8 | * by the Free Software Foundation. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/debugfs.h> |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/phy.h> |
| 14 | |
| 15 | #include "ramips_eth.h" |
| 16 | |
| 17 | static struct dentry *raeth_debugfs_root; |
| 18 | |
| 19 | static int raeth_debugfs_generic_open(struct inode *inode, struct file *file) |
| 20 | { |
| 21 | file->private_data = inode->i_private; |
| 22 | return 0; |
| 23 | } |
| 24 | |
| 25 | void raeth_debugfs_update_int_stats(struct raeth_priv *re, u32 status) |
| 26 | { |
| 27 | re->debug.int_stats.total += !!status; |
| 28 | |
| 29 | re->debug.int_stats.rx_delayed += !!(status & RAMIPS_RX_DLY_INT); |
| 30 | re->debug.int_stats.rx_done0 += !!(status & RAMIPS_RX_DONE_INT0); |
| 31 | re->debug.int_stats.rx_coherent += !!(status & RAMIPS_RX_COHERENT); |
| 32 | |
| 33 | re->debug.int_stats.tx_delayed += !!(status & RAMIPS_TX_DLY_INT); |
| 34 | re->debug.int_stats.tx_done0 += !!(status & RAMIPS_TX_DONE_INT0); |
| 35 | re->debug.int_stats.tx_done1 += !!(status & RAMIPS_TX_DONE_INT1); |
| 36 | re->debug.int_stats.tx_done2 += !!(status & RAMIPS_TX_DONE_INT2); |
| 37 | re->debug.int_stats.tx_done3 += !!(status & RAMIPS_TX_DONE_INT3); |
| 38 | re->debug.int_stats.tx_coherent += !!(status & RAMIPS_TX_COHERENT); |
| 39 | |
| 40 | re->debug.int_stats.pse_fq_empty += !!(status & RAMIPS_PSE_FQ_EMPTY); |
| 41 | re->debug.int_stats.pse_p0_fc += !!(status & RAMIPS_PSE_P0_FC); |
| 42 | re->debug.int_stats.pse_p1_fc += !!(status & RAMIPS_PSE_P1_FC); |
| 43 | re->debug.int_stats.pse_p2_fc += !!(status & RAMIPS_PSE_P2_FC); |
| 44 | re->debug.int_stats.pse_buf_drop += !!(status & RAMIPS_PSE_BUF_DROP); |
| 45 | } |
| 46 | |
| 47 | static ssize_t read_file_int_stats(struct file *file, char __user *user_buf, |
| 48 | size_t count, loff_t *ppos) |
| 49 | { |
| 50 | #define PR_INT_STAT(_label, _field) \ |
| 51 | len += snprintf(buf + len, sizeof(buf) - len, \ |
| 52 | "%-18s: %10lu\n", _label, re->debug.int_stats._field); |
| 53 | |
| 54 | struct raeth_priv *re = file->private_data; |
| 55 | char buf[512]; |
| 56 | unsigned int len = 0; |
| 57 | unsigned long flags; |
| 58 | |
| 59 | spin_lock_irqsave(&re->page_lock, flags); |
| 60 | |
| 61 | PR_INT_STAT("RX Delayed", rx_delayed); |
| 62 | PR_INT_STAT("RX Done 0", rx_done0); |
| 63 | PR_INT_STAT("RX Coherent", rx_coherent); |
| 64 | |
| 65 | PR_INT_STAT("TX Delayed", tx_delayed); |
| 66 | PR_INT_STAT("TX Done 0", tx_done0); |
| 67 | PR_INT_STAT("TX Done 1", tx_done1); |
| 68 | PR_INT_STAT("TX Done 2", tx_done2); |
| 69 | PR_INT_STAT("TX Done 3", tx_done3); |
| 70 | PR_INT_STAT("TX Coherent", tx_coherent); |
| 71 | |
| 72 | PR_INT_STAT("PSE FQ empty", pse_fq_empty); |
| 73 | PR_INT_STAT("CDMA Flow control", pse_p0_fc); |
| 74 | PR_INT_STAT("GDMA1 Flow control", pse_p1_fc); |
| 75 | PR_INT_STAT("GDMA2 Flow control", pse_p2_fc); |
| 76 | PR_INT_STAT("PSE discard", pse_buf_drop); |
| 77 | |
| 78 | len += snprintf(buf + len, sizeof(buf) - len, "\n"); |
| 79 | PR_INT_STAT("Total", total); |
| 80 | |
| 81 | spin_unlock_irqrestore(&re->page_lock, flags); |
| 82 | |
| 83 | return simple_read_from_buffer(user_buf, count, ppos, buf, len); |
| 84 | #undef PR_INT_STAT |
| 85 | } |
| 86 | |
| 87 | static const struct file_operations raeth_fops_int_stats = { |
| 88 | .open = raeth_debugfs_generic_open, |
| 89 | .read = read_file_int_stats, |
| 90 | .owner = THIS_MODULE |
| 91 | }; |
| 92 | |
| 93 | void raeth_debugfs_exit(struct raeth_priv *re) |
| 94 | { |
| 95 | debugfs_remove_recursive(re->debug.debugfs_dir); |
| 96 | } |
| 97 | |
| 98 | int raeth_debugfs_init(struct raeth_priv *re) |
| 99 | { |
| 100 | re->debug.debugfs_dir = debugfs_create_dir(re->netdev->name, |
| 101 | raeth_debugfs_root); |
| 102 | if (!re->debug.debugfs_dir) |
| 103 | return -ENOMEM; |
| 104 | |
| 105 | debugfs_create_file("int_stats", S_IRUGO, re->debug.debugfs_dir, |
| 106 | re, &raeth_fops_int_stats); |
| 107 | |
| 108 | return 0; |
| 109 | } |
| 110 | |
| 111 | int raeth_debugfs_root_init(void) |
| 112 | { |
| 113 | if (raeth_debugfs_root) |
| 114 | return -EBUSY; |
| 115 | |
| 116 | raeth_debugfs_root = debugfs_create_dir("raeth", NULL); |
| 117 | if (!raeth_debugfs_root) |
| 118 | return -ENOENT; |
| 119 | |
| 120 | return 0; |
| 121 | } |
| 122 | |
| 123 | void raeth_debugfs_root_exit(void) |
| 124 | { |
| 125 | debugfs_remove(raeth_debugfs_root); |
| 126 | raeth_debugfs_root = NULL; |
| 127 | } |
| 128 | |
