/* * Atheros AR71xx built-in ethernet mac driver * * Copyright (c) 2016 The Linux Foundation. All rights reserved. * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org> * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> * * Based on Atheros' AG7100 driver * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published * by the Free Software Foundation. */ #include <linux/debugfs.h> #include "ag71xx.h" static struct dentry *ag71xx_debugfs_root; static int ag71xx_debugfs_generic_open(struct inode *inode, struct file *file) { file->private_data = inode->i_private; return 0; } void ag71xx_debugfs_update_int_stats(struct ag71xx *ag, u32 status) { if (status) ag->debug.int_stats.total++; if (status & AG71XX_INT_TX_PS) ag->debug.int_stats.tx_ps++; if (status & AG71XX_INT_TX_UR) ag->debug.int_stats.tx_ur++; if (status & AG71XX_INT_TX_BE) ag->debug.int_stats.tx_be++; if (status & AG71XX_INT_RX_PR) ag->debug.int_stats.rx_pr++; if (status & AG71XX_INT_RX_OF) ag->debug.int_stats.rx_of++; if (status & AG71XX_INT_RX_BE) ag->debug.int_stats.rx_be++; } static ssize_t read_file_int_stats(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { #define PR_INT_STAT(_label, _field) \ len += snprintf(buf + len, sizeof(buf) - len, \ "%20s: %10lu\n", _label, ag->debug.int_stats._field); struct ag71xx *ag = file->private_data; char buf[256]; unsigned int len = 0; PR_INT_STAT("TX Packet Sent", tx_ps); PR_INT_STAT("TX Underrun", tx_ur); PR_INT_STAT("TX Bus Error", tx_be); PR_INT_STAT("RX Packet Received", rx_pr); PR_INT_STAT("RX Overflow", rx_of); PR_INT_STAT("RX Bus Error", rx_be); len += snprintf(buf + len, sizeof(buf) - len, "\n"); PR_INT_STAT("Total", total); return simple_read_from_buffer(user_buf, count, ppos, buf, len); #undef PR_INT_STAT } static const struct file_operations ag71xx_fops_int_stats = { .open = ag71xx_debugfs_generic_open, .read = read_file_int_stats, .owner = THIS_MODULE }; void ag71xx_debugfs_update_napi_stats(struct ag71xx *ag, int rx, int tx) { struct ag71xx_napi_stats *stats = &ag->debug.napi_stats; if (rx) { stats->rx_count++; stats->rx_packets += rx; if (rx <= AG71XX_NAPI_WEIGHT) stats->rx[rx]++; if (rx > stats->rx_packets_max) stats->rx_packets_max = rx; } if (tx) { stats->tx_count++; stats->tx_packets += tx; if (tx <= AG71XX_NAPI_WEIGHT) stats->tx[tx]++; if (tx > stats->tx_packets_max) stats->tx_packets_max = tx; } } static ssize_t read_file_napi_stats(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { struct ag71xx *ag = file->private_data; struct ag71xx_napi_stats *stats = &ag->debug.napi_stats; char *buf; unsigned int buflen; unsigned int len = 0; unsigned long rx_avg = 0; unsigned long tx_avg = 0; int ret; int i; buflen = 2048; buf = kmalloc(buflen, GFP_KERNEL); if (!buf) return -ENOMEM; if (stats->rx_count) rx_avg = stats->rx_packets / stats->rx_count; if (stats->tx_count) tx_avg = stats->tx_packets / stats->tx_count; len += snprintf(buf + len, buflen - len, "%3s %10s %10s\n", "len", "rx", "tx"); for (i = 1; i <= AG71XX_NAPI_WEIGHT; i++) len += snprintf(buf + len, buflen - len, "%3d: %10lu %10lu\n", i, stats->rx[i], stats->tx[i]); len += snprintf(buf + len, buflen - len, "\n"); len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n", "sum", stats->rx_count, stats->tx_count); len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n", "avg", rx_avg, tx_avg); len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n", "max", stats->rx_packets_max, stats->tx_packets_max); len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n", "pkt", stats->rx_packets, stats->tx_packets); ret = simple_read_from_buffer(user_buf, count, ppos, buf, len); kfree(buf); return ret; } static const struct file_operations ag71xx_fops_napi_stats = { .open = ag71xx_debugfs_generic_open, .read = read_file_napi_stats, .owner = THIS_MODULE }; #define DESC_PRINT_LEN 64 static ssize_t read_file_ring(struct file *file, char __user *user_buf, size_t count, loff_t *ppos, struct ag71xx *ag, struct ag71xx_ring *ring, unsigned desc_reg) { char *buf; unsigned int buflen; unsigned int len = 0; unsigned long flags; ssize_t ret; u32 desc_hw; int i; buflen = (ring->size * DESC_PRINT_LEN); buf = kmalloc(buflen, GFP_KERNEL); if (!buf) return -ENOMEM; len += snprintf(buf + len, buflen - len, "Idx ... %-8s %-8s %-8s %-8s\n", "desc", "next", "data", "ctrl"); spin_lock_irqsave(&ag->lock, flags); desc_hw = ag71xx_rr(ag, desc_reg); for (i = 0; i < ring->size; i++) { struct ag71xx_buf *ab = &ring->buf[i]; u32 desc_dma = ((u32)ring->descs_dma) + i * ring->desc_size; len += snprintf(buf + len, buflen - len, "%3d %c%c%c %08x %08x %08x %08x %c\n", i, (&ring->buf[i] == ring->curr) ? 'C' : ' ', (&ring->buf[i] == ring->dirty) ? 'D' : ' ', (desc_hw == desc_dma) ? 'H' : ' ', desc_dma, ab->desc->next, ab->desc->data, ab->desc->ctrl, (ab->desc->ctrl & DESC_EMPTY) ? 'E' : '*'); } spin_unlock_irqrestore(&ag->lock, flags); ret = simple_read_from_buffer(user_buf, count, ppos, buf, len); kfree(buf); return ret; } static ssize_t read_file_tx_ring(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { struct ag71xx *ag = file->private_data; return read_file_ring(file, user_buf, count, ppos, ag, &ag->tx_ring, AG71XX_REG_TX_DESC); } static const struct file_operations ag71xx_fops_tx_ring = { .open = ag71xx_debugfs_generic_open, .read = read_file_tx_ring, .owner = THIS_MODULE }; static ssize_t read_file_rx_ring(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { struct ag71xx *ag = file->private_data; return read_file_ring(file, user_buf, count, ppos, ag, &ag->rx_ring, AG71XX_REG_RX_DESC); } static const struct file_operations ag71xx_fops_rx_ring = { .open = ag71xx_debugfs_generic_open, .read = read_file_rx_ring, .owner = THIS_MODULE }; void ag71xx_debugfs_exit(struct ag71xx *ag) { debugfs_remove_recursive(ag->debug.debugfs_dir); } int ag71xx_debugfs_init(struct ag71xx *ag) { ag->debug.debugfs_dir = debugfs_create_dir(ag->dev->name, ag71xx_debugfs_root); if (!ag->debug.debugfs_dir) return -ENOMEM; debugfs_create_file("int_stats", S_IRUGO, ag->debug.debugfs_dir, ag, &ag71xx_fops_int_stats); debugfs_create_file("napi_stats", S_IRUGO, ag->debug.debugfs_dir, ag, &ag71xx_fops_napi_stats); debugfs_create_file("tx_ring", S_IRUGO, ag->debug.debugfs_dir, ag, &ag71xx_fops_tx_ring); debugfs_create_file("rx_ring", S_IRUGO, ag->debug.debugfs_dir, ag, &ag71xx_fops_rx_ring); return 0; } int ag71xx_debugfs_root_init(void) { if (ag71xx_debugfs_root) return -EBUSY; ag71xx_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL); if (!ag71xx_debugfs_root) return -ENOENT; return 0; } void ag71xx_debugfs_root_exit(void) { debugfs_remove(ag71xx_debugfs_root); ag71xx_debugfs_root = NULL; }