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286 lines
7.2 KiB
C
286 lines
7.2 KiB
C
/*
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* Atheros AR71xx built-in ethernet mac driver
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*
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* Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
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* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
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*
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* Based on Atheros' AG7100 driver
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*/
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#include <linux/debugfs.h>
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#include "ag71xx.h"
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static struct dentry *ag71xx_debugfs_root;
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static int ag71xx_debugfs_generic_open(struct inode *inode, struct file *file)
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{
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file->private_data = inode->i_private;
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return 0;
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}
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void ag71xx_debugfs_update_int_stats(struct ag71xx *ag, u32 status)
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{
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if (status)
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ag->debug.int_stats.total++;
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if (status & AG71XX_INT_TX_PS)
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ag->debug.int_stats.tx_ps++;
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if (status & AG71XX_INT_TX_UR)
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ag->debug.int_stats.tx_ur++;
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if (status & AG71XX_INT_TX_BE)
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ag->debug.int_stats.tx_be++;
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if (status & AG71XX_INT_RX_PR)
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ag->debug.int_stats.rx_pr++;
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if (status & AG71XX_INT_RX_OF)
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ag->debug.int_stats.rx_of++;
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if (status & AG71XX_INT_RX_BE)
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ag->debug.int_stats.rx_be++;
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}
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static ssize_t read_file_int_stats(struct file *file, char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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#define PR_INT_STAT(_label, _field) \
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len += snprintf(buf + len, sizeof(buf) - len, \
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"%20s: %10lu\n", _label, ag->debug.int_stats._field);
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struct ag71xx *ag = file->private_data;
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char buf[256];
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unsigned int len = 0;
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PR_INT_STAT("TX Packet Sent", tx_ps);
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PR_INT_STAT("TX Underrun", tx_ur);
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PR_INT_STAT("TX Bus Error", tx_be);
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PR_INT_STAT("RX Packet Received", rx_pr);
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PR_INT_STAT("RX Overflow", rx_of);
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PR_INT_STAT("RX Bus Error", rx_be);
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len += snprintf(buf + len, sizeof(buf) - len, "\n");
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PR_INT_STAT("Total", total);
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return simple_read_from_buffer(user_buf, count, ppos, buf, len);
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#undef PR_INT_STAT
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}
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static const struct file_operations ag71xx_fops_int_stats = {
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.open = ag71xx_debugfs_generic_open,
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.read = read_file_int_stats,
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.owner = THIS_MODULE
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};
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void ag71xx_debugfs_update_napi_stats(struct ag71xx *ag, int rx, int tx)
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{
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struct ag71xx_napi_stats *stats = &ag->debug.napi_stats;
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if (rx) {
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stats->rx_count++;
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stats->rx_packets += rx;
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if (rx <= AG71XX_NAPI_WEIGHT)
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stats->rx[rx]++;
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if (rx > stats->rx_packets_max)
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stats->rx_packets_max = rx;
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}
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if (tx) {
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stats->tx_count++;
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stats->tx_packets += tx;
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if (tx <= AG71XX_NAPI_WEIGHT)
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stats->tx[tx]++;
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if (tx > stats->tx_packets_max)
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stats->tx_packets_max = tx;
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}
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}
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static ssize_t read_file_napi_stats(struct file *file, char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct ag71xx *ag = file->private_data;
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struct ag71xx_napi_stats *stats = &ag->debug.napi_stats;
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char *buf;
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unsigned int buflen;
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unsigned int len = 0;
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unsigned long rx_avg = 0;
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unsigned long tx_avg = 0;
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int ret;
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int i;
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buflen = 2048;
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buf = kmalloc(buflen, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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if (stats->rx_count)
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rx_avg = stats->rx_packets / stats->rx_count;
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if (stats->tx_count)
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tx_avg = stats->tx_packets / stats->tx_count;
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len += snprintf(buf + len, buflen - len, "%3s %10s %10s\n",
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"len", "rx", "tx");
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for (i = 1; i <= AG71XX_NAPI_WEIGHT; i++)
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len += snprintf(buf + len, buflen - len,
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"%3d: %10lu %10lu\n",
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i, stats->rx[i], stats->tx[i]);
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len += snprintf(buf + len, buflen - len, "\n");
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len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
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"sum", stats->rx_count, stats->tx_count);
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len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
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"avg", rx_avg, tx_avg);
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len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
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"max", stats->rx_packets_max, stats->tx_packets_max);
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len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
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"pkt", stats->rx_packets, stats->tx_packets);
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ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);
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kfree(buf);
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return ret;
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}
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static const struct file_operations ag71xx_fops_napi_stats = {
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.open = ag71xx_debugfs_generic_open,
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.read = read_file_napi_stats,
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.owner = THIS_MODULE
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};
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#define DESC_PRINT_LEN 64
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static ssize_t read_file_ring(struct file *file, char __user *user_buf,
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size_t count, loff_t *ppos,
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struct ag71xx *ag,
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struct ag71xx_ring *ring,
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unsigned desc_reg)
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{
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int ring_size = BIT(ring->order);
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int ring_mask = ring_size - 1;
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char *buf;
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unsigned int buflen;
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unsigned int len = 0;
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unsigned long flags;
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ssize_t ret;
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int curr;
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int dirty;
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u32 desc_hw;
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int i;
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buflen = (ring_size * DESC_PRINT_LEN);
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buf = kmalloc(buflen, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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len += snprintf(buf + len, buflen - len,
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"Idx ... %-8s %-8s %-8s %-8s .\n",
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"desc", "next", "data", "ctrl");
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spin_lock_irqsave(&ag->lock, flags);
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curr = (ring->curr & ring_mask);
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dirty = (ring->dirty & ring_mask);
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desc_hw = ag71xx_rr(ag, desc_reg);
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for (i = 0; i < ring_size; i++) {
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struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
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u32 desc_dma = ((u32) ring->descs_dma) + i * AG71XX_DESC_SIZE;
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len += snprintf(buf + len, buflen - len,
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"%3d %c%c%c %08x %08x %08x %08x %c\n",
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i,
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(i == curr) ? 'C' : ' ',
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(i == dirty) ? 'D' : ' ',
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(desc_hw == desc_dma) ? 'H' : ' ',
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desc_dma,
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desc->next,
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desc->data,
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desc->ctrl,
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(desc->ctrl & DESC_EMPTY) ? 'E' : '*');
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}
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spin_unlock_irqrestore(&ag->lock, flags);
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ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);
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kfree(buf);
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return ret;
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}
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static ssize_t read_file_tx_ring(struct file *file, char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct ag71xx *ag = file->private_data;
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return read_file_ring(file, user_buf, count, ppos, ag, &ag->tx_ring,
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AG71XX_REG_TX_DESC);
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}
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static const struct file_operations ag71xx_fops_tx_ring = {
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.open = ag71xx_debugfs_generic_open,
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.read = read_file_tx_ring,
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.owner = THIS_MODULE
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};
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static ssize_t read_file_rx_ring(struct file *file, char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct ag71xx *ag = file->private_data;
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return read_file_ring(file, user_buf, count, ppos, ag, &ag->rx_ring,
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AG71XX_REG_RX_DESC);
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}
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static const struct file_operations ag71xx_fops_rx_ring = {
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.open = ag71xx_debugfs_generic_open,
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.read = read_file_rx_ring,
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.owner = THIS_MODULE
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};
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void ag71xx_debugfs_exit(struct ag71xx *ag)
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{
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debugfs_remove_recursive(ag->debug.debugfs_dir);
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}
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int ag71xx_debugfs_init(struct ag71xx *ag)
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{
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struct device *dev = &ag->pdev->dev;
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ag->debug.debugfs_dir = debugfs_create_dir(dev_name(dev),
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ag71xx_debugfs_root);
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if (!ag->debug.debugfs_dir) {
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dev_err(dev, "unable to create debugfs directory\n");
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return -ENOENT;
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}
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debugfs_create_file("int_stats", S_IRUGO, ag->debug.debugfs_dir,
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ag, &ag71xx_fops_int_stats);
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debugfs_create_file("napi_stats", S_IRUGO, ag->debug.debugfs_dir,
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ag, &ag71xx_fops_napi_stats);
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debugfs_create_file("tx_ring", S_IRUGO, ag->debug.debugfs_dir,
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ag, &ag71xx_fops_tx_ring);
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debugfs_create_file("rx_ring", S_IRUGO, ag->debug.debugfs_dir,
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ag, &ag71xx_fops_rx_ring);
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return 0;
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}
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int ag71xx_debugfs_root_init(void)
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{
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if (ag71xx_debugfs_root)
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return -EBUSY;
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ag71xx_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
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if (!ag71xx_debugfs_root)
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return -ENOENT;
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return 0;
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}
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void ag71xx_debugfs_root_exit(void)
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{
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debugfs_remove(ag71xx_debugfs_root);
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ag71xx_debugfs_root = NULL;
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}
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