sky2: debug interface
Add an optional debug interface for displaying state of transmit/receive rings. Creates a file debugfs/sky2/ethX for each device that is up. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Stephen Hemminger
Jeff Garzik
parent
55d7b4e6ed
commit
3cf267539f
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@ -2133,6 +2133,16 @@ config SKY2
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To compile this driver as a module, choose M here: the module
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will be called sky2. This is recommended.
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config SKY2_DEBUG
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bool "Debugging interface"
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depends on SKY2 && DEBUG_FS
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help
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This option adds the ability to dump driver state for debugging.
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The file debugfs/sky2/ethX displays the state of the internal
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transmit and receive rings.
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If unsure, say N.
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config SK98LIN
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tristate "Marvell Yukon Chipset / SysKonnect SK-98xx Support (DEPRECATED)"
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depends on PCI
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@ -39,6 +39,7 @@
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#include <linux/workqueue.h>
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#include <linux/if_vlan.h>
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#include <linux/prefetch.h>
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#include <linux/debugfs.h>
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#include <linux/mii.h>
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#include <asm/irq.h>
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@ -1574,13 +1575,13 @@ static void sky2_tx_complete(struct sky2_port *sky2, u16 done)
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if (unlikely(netif_msg_tx_done(sky2)))
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printk(KERN_DEBUG "%s: tx done %u\n",
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dev->name, idx);
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sky2->net_stats.tx_packets++;
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sky2->net_stats.tx_bytes += re->skb->len;
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dev_kfree_skb_any(re->skb);
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sky2->tx_next = RING_NEXT(idx, TX_RING_SIZE);
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}
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le->opcode = 0; /* paranoia */
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}
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sky2->tx_cons = idx;
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@ -3470,6 +3471,195 @@ static const struct ethtool_ops sky2_ethtool_ops = {
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.get_perm_addr = ethtool_op_get_perm_addr,
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};
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#ifdef CONFIG_SKY2_DEBUG
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static struct dentry *sky2_debug;
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static int sky2_debug_show(struct seq_file *seq, void *v)
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{
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struct net_device *dev = seq->private;
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const struct sky2_port *sky2 = netdev_priv(dev);
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const struct sky2_hw *hw = sky2->hw;
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unsigned port = sky2->port;
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unsigned idx, last;
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int sop;
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if (!netif_running(dev))
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return -ENETDOWN;
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seq_printf(seq, "IRQ src=%x mask=%x control=%x\n",
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sky2_read32(hw, B0_ISRC),
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sky2_read32(hw, B0_IMSK),
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sky2_read32(hw, B0_Y2_SP_ICR));
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netif_poll_disable(hw->dev[0]);
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last = sky2_read16(hw, STAT_PUT_IDX);
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if (hw->st_idx == last)
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seq_puts(seq, "Status ring (empty)\n");
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else {
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seq_puts(seq, "Status ring\n");
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for (idx = hw->st_idx; idx != last && idx < STATUS_RING_SIZE;
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idx = RING_NEXT(idx, STATUS_RING_SIZE)) {
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const struct sky2_status_le *le = hw->st_le + idx;
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seq_printf(seq, "[%d] %#x %d %#x\n",
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idx, le->opcode, le->length, le->status);
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}
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seq_puts(seq, "\n");
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}
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seq_printf(seq, "Tx ring pending=%u...%u report=%d done=%d\n",
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sky2->tx_cons, sky2->tx_prod,
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sky2_read16(hw, port == 0 ? STAT_TXA1_RIDX : STAT_TXA2_RIDX),
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sky2_read16(hw, Q_ADDR(txqaddr[port], Q_DONE)));
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/* Dump contents of tx ring */
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sop = 1;
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for (idx = sky2->tx_next; idx != sky2->tx_prod && idx < TX_RING_SIZE;
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idx = RING_NEXT(idx, TX_RING_SIZE)) {
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const struct sky2_tx_le *le = sky2->tx_le + idx;
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u32 a = le32_to_cpu(le->addr);
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if (sop)
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seq_printf(seq, "%u:", idx);
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sop = 0;
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switch(le->opcode & ~HW_OWNER) {
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case OP_ADDR64:
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seq_printf(seq, " %#x:", a);
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break;
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case OP_LRGLEN:
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seq_printf(seq, " mtu=%d", a);
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break;
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case OP_VLAN:
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seq_printf(seq, " vlan=%d", be16_to_cpu(le->length));
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break;
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case OP_TCPLISW:
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seq_printf(seq, " csum=%#x", a);
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break;
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case OP_LARGESEND:
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seq_printf(seq, " tso=%#x(%d)", a, le16_to_cpu(le->length));
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break;
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case OP_PACKET:
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seq_printf(seq, " %#x(%d)", a, le16_to_cpu(le->length));
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break;
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case OP_BUFFER:
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seq_printf(seq, " frag=%#x(%d)", a, le16_to_cpu(le->length));
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break;
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default:
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seq_printf(seq, " op=%#x,%#x(%d)", le->opcode,
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a, le16_to_cpu(le->length));
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}
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if (le->ctrl & EOP) {
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seq_putc(seq, '\n');
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sop = 1;
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}
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}
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seq_printf(seq, "\nRx ring hw get=%d put=%d last=%d\n",
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sky2_read16(hw, Y2_QADDR(rxqaddr[port], PREF_UNIT_GET_IDX)),
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last = sky2_read16(hw, Y2_QADDR(rxqaddr[port], PREF_UNIT_PUT_IDX)),
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sky2_read16(hw, Y2_QADDR(rxqaddr[port], PREF_UNIT_LAST_IDX)));
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netif_poll_enable(hw->dev[0]);
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return 0;
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}
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static int sky2_debug_open(struct inode *inode, struct file *file)
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{
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return single_open(file, sky2_debug_show, inode->i_private);
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}
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static const struct file_operations sky2_debug_fops = {
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.owner = THIS_MODULE,
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.open = sky2_debug_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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/*
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* Use network device events to create/remove/rename
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* debugfs file entries
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*/
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static int sky2_device_event(struct notifier_block *unused,
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unsigned long event, void *ptr)
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{
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struct net_device *dev = ptr;
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if (dev->open == sky2_up) {
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struct sky2_port *sky2 = netdev_priv(dev);
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switch(event) {
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case NETDEV_CHANGENAME:
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if (!netif_running(dev))
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break;
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/* fallthrough */
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case NETDEV_DOWN:
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case NETDEV_GOING_DOWN:
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if (sky2->debugfs) {
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printk(KERN_DEBUG PFX "%s: remove debugfs\n",
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dev->name);
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debugfs_remove(sky2->debugfs);
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sky2->debugfs = NULL;
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}
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if (event != NETDEV_CHANGENAME)
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break;
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/* fallthrough for changename */
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case NETDEV_UP:
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if (sky2_debug) {
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struct dentry *d;
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d = debugfs_create_file(dev->name, S_IRUGO,
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sky2_debug, dev,
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&sky2_debug_fops);
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if (d == NULL || IS_ERR(d))
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printk(KERN_INFO PFX
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"%s: debugfs create failed\n",
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dev->name);
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else
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sky2->debugfs = d;
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}
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break;
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}
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}
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return NOTIFY_DONE;
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}
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static struct notifier_block sky2_notifier = {
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.notifier_call = sky2_device_event,
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};
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static __init void sky2_debug_init(void)
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{
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struct dentry *ent;
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ent = debugfs_create_dir("sky2", NULL);
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if (!ent || IS_ERR(ent))
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return;
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sky2_debug = ent;
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register_netdevice_notifier(&sky2_notifier);
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}
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static __exit void sky2_debug_cleanup(void)
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{
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if (sky2_debug) {
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unregister_netdevice_notifier(&sky2_notifier);
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debugfs_remove(sky2_debug);
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sky2_debug = NULL;
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}
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}
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#else
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#define sky2_debug_init()
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#define sky2_debug_cleanup()
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#endif
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/* Initialize network device */
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static __devinit struct net_device *sky2_init_netdev(struct sky2_hw *hw,
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unsigned port,
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@ -3960,12 +4150,14 @@ static struct pci_driver sky2_driver = {
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static int __init sky2_init_module(void)
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{
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sky2_debug_init();
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return pci_register_driver(&sky2_driver);
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}
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static void __exit sky2_cleanup_module(void)
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{
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pci_unregister_driver(&sky2_driver);
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sky2_debug_cleanup();
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}
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module_init(sky2_init_module);
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@ -1998,6 +1998,7 @@ struct sky2_port {
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struct sky2_tx_le *tx_le;
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u16 tx_cons; /* next le to check */
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u16 tx_prod; /* next le to use */
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u16 tx_next; /* debug only */
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u32 tx_addr64;
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u16 tx_pending;
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u16 tx_last_mss;
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@ -2028,6 +2029,9 @@ struct sky2_port {
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enum flow_control flow_mode;
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enum flow_control flow_status;
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#ifdef CONFIG_SKY2_DEBUG
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struct dentry *debugfs;
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#endif
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struct net_device_stats net_stats;
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};
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