+#ifdef CONFIG_SKY2_DEBUG
+
+static struct dentry *sky2_debug;
+
+static int sky2_debug_show(struct seq_file *seq, void *v)
+{
+ struct net_device *dev = seq->private;
+ const struct sky2_port *sky2 = netdev_priv(dev);
+ struct sky2_hw *hw = sky2->hw;
+ unsigned port = sky2->port;
+ unsigned idx, last;
+ int sop;
+
+ if (!netif_running(dev))
+ return -ENETDOWN;
+
+ seq_printf(seq, "IRQ src=%x mask=%x control=%x\n",
+ sky2_read32(hw, B0_ISRC),
+ sky2_read32(hw, B0_IMSK),
+ sky2_read32(hw, B0_Y2_SP_ICR));
+
+ napi_disable(&hw->napi);
+ last = sky2_read16(hw, STAT_PUT_IDX);
+
+ if (hw->st_idx == last)
+ seq_puts(seq, "Status ring (empty)\n");
+ else {
+ seq_puts(seq, "Status ring\n");
+ for (idx = hw->st_idx; idx != last && idx < STATUS_RING_SIZE;
+ idx = RING_NEXT(idx, STATUS_RING_SIZE)) {
+ const struct sky2_status_le *le = hw->st_le + idx;
+ seq_printf(seq, "[%d] %#x %d %#x\n",
+ idx, le->opcode, le->length, le->status);
+ }
+ seq_puts(seq, "\n");
+ }
+
+ seq_printf(seq, "Tx ring pending=%u...%u report=%d done=%d\n",
+ sky2->tx_cons, sky2->tx_prod,
+ sky2_read16(hw, port == 0 ? STAT_TXA1_RIDX : STAT_TXA2_RIDX),
+ sky2_read16(hw, Q_ADDR(txqaddr[port], Q_DONE)));
+
+ /* Dump contents of tx ring */
+ sop = 1;
+ for (idx = sky2->tx_next; idx != sky2->tx_prod && idx < TX_RING_SIZE;
+ idx = RING_NEXT(idx, TX_RING_SIZE)) {
+ const struct sky2_tx_le *le = sky2->tx_le + idx;
+ u32 a = le32_to_cpu(le->addr);
+
+ if (sop)
+ seq_printf(seq, "%u:", idx);
+ sop = 0;
+
+ switch(le->opcode & ~HW_OWNER) {
+ case OP_ADDR64:
+ seq_printf(seq, " %#x:", a);
+ break;
+ case OP_LRGLEN:
+ seq_printf(seq, " mtu=%d", a);
+ break;
+ case OP_VLAN:
+ seq_printf(seq, " vlan=%d", be16_to_cpu(le->length));
+ break;
+ case OP_TCPLISW:
+ seq_printf(seq, " csum=%#x", a);
+ break;
+ case OP_LARGESEND:
+ seq_printf(seq, " tso=%#x(%d)", a, le16_to_cpu(le->length));
+ break;
+ case OP_PACKET:
+ seq_printf(seq, " %#x(%d)", a, le16_to_cpu(le->length));
+ break;
+ case OP_BUFFER:
+ seq_printf(seq, " frag=%#x(%d)", a, le16_to_cpu(le->length));
+ break;
+ default:
+ seq_printf(seq, " op=%#x,%#x(%d)", le->opcode,
+ a, le16_to_cpu(le->length));
+ }
+
+ if (le->ctrl & EOP) {
+ seq_putc(seq, '\n');
+ sop = 1;
+ }
+ }
+
+ seq_printf(seq, "\nRx ring hw get=%d put=%d last=%d\n",
+ sky2_read16(hw, Y2_QADDR(rxqaddr[port], PREF_UNIT_GET_IDX)),
+ last = sky2_read16(hw, Y2_QADDR(rxqaddr[port], PREF_UNIT_PUT_IDX)),
+ sky2_read16(hw, Y2_QADDR(rxqaddr[port], PREF_UNIT_LAST_IDX)));
+
+ napi_enable(&hw->napi);
+ return 0;
+}
+
+static int sky2_debug_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, sky2_debug_show, inode->i_private);
+}
+
+static const struct file_operations sky2_debug_fops = {
+ .owner = THIS_MODULE,
+ .open = sky2_debug_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+/*
+ * Use network device events to create/remove/rename
+ * debugfs file entries
+ */
+static int sky2_device_event(struct notifier_block *unused,
+ unsigned long event, void *ptr)
+{
+ struct net_device *dev = ptr;
+ struct sky2_port *sky2 = netdev_priv(dev);
+
+ if (dev->open != sky2_up || !sky2_debug)
+ return NOTIFY_DONE;
+
+ switch(event) {
+ case NETDEV_CHANGENAME:
+ if (sky2->debugfs) {
+ sky2->debugfs = debugfs_rename(sky2_debug, sky2->debugfs,
+ sky2_debug, dev->name);
+ }
+ break;
+
+ case NETDEV_GOING_DOWN:
+ if (sky2->debugfs) {
+ printk(KERN_DEBUG PFX "%s: remove debugfs\n",
+ dev->name);
+ debugfs_remove(sky2->debugfs);
+ sky2->debugfs = NULL;
+ }
+ break;
+
+ case NETDEV_UP:
+ sky2->debugfs = debugfs_create_file(dev->name, S_IRUGO,
+ sky2_debug, dev,
+ &sky2_debug_fops);
+ if (IS_ERR(sky2->debugfs))
+ sky2->debugfs = NULL;
+ }
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block sky2_notifier = {
+ .notifier_call = sky2_device_event,
+};
+
+
+static __init void sky2_debug_init(void)
+{
+ struct dentry *ent;
+
+ ent = debugfs_create_dir("sky2", NULL);
+ if (!ent || IS_ERR(ent))
+ return;
+
+ sky2_debug = ent;
+ register_netdevice_notifier(&sky2_notifier);
+}
+
+static __exit void sky2_debug_cleanup(void)
+{
+ if (sky2_debug) {
+ unregister_netdevice_notifier(&sky2_notifier);
+ debugfs_remove(sky2_debug);
+ sky2_debug = NULL;
+ }
+}
+
+#else
+#define sky2_debug_init()
+#define sky2_debug_cleanup()
+#endif
+
+