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>
diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index f6fe286..90b1b97 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -39,6 +39,7 @@
#include <linux/workqueue.h>
#include <linux/if_vlan.h>
#include <linux/prefetch.h>
+#include <linux/debugfs.h>
#include <linux/mii.h>
#include <asm/irq.h>
@@ -1574,13 +1575,13 @@
if (unlikely(netif_msg_tx_done(sky2)))
printk(KERN_DEBUG "%s: tx done %u\n",
dev->name, idx);
+
sky2->net_stats.tx_packets++;
sky2->net_stats.tx_bytes += re->skb->len;
dev_kfree_skb_any(re->skb);
+ sky2->tx_next = RING_NEXT(idx, TX_RING_SIZE);
}
-
- le->opcode = 0; /* paranoia */
}
sky2->tx_cons = idx;
@@ -3470,6 +3471,195 @@
.get_perm_addr = ethtool_op_get_perm_addr,
};
+#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);
+ const 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));
+
+ netif_poll_disable(hw->dev[0]);
+ 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)));
+
+ netif_poll_enable(hw->dev[0]);
+ 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;
+
+ if (dev->open == sky2_up) {
+ struct sky2_port *sky2 = netdev_priv(dev);
+
+ switch(event) {
+ case NETDEV_CHANGENAME:
+ if (!netif_running(dev))
+ break;
+ /* fallthrough */
+ case NETDEV_DOWN:
+ case NETDEV_GOING_DOWN:
+ if (sky2->debugfs) {
+ printk(KERN_DEBUG PFX "%s: remove debugfs\n",
+ dev->name);
+ debugfs_remove(sky2->debugfs);
+ sky2->debugfs = NULL;
+ }
+
+ if (event != NETDEV_CHANGENAME)
+ break;
+ /* fallthrough for changename */
+ case NETDEV_UP:
+ if (sky2_debug) {
+ struct dentry *d;
+ d = debugfs_create_file(dev->name, S_IRUGO,
+ sky2_debug, dev,
+ &sky2_debug_fops);
+ if (d == NULL || IS_ERR(d))
+ printk(KERN_INFO PFX
+ "%s: debugfs create failed\n",
+ dev->name);
+ else
+ sky2->debugfs = d;
+ }
+ break;
+ }
+ }
+
+ 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
+
+
/* Initialize network device */
static __devinit struct net_device *sky2_init_netdev(struct sky2_hw *hw,
unsigned port,
@@ -3960,12 +4150,14 @@
static int __init sky2_init_module(void)
{
+ sky2_debug_init();
return pci_register_driver(&sky2_driver);
}
static void __exit sky2_cleanup_module(void)
{
pci_unregister_driver(&sky2_driver);
+ sky2_debug_cleanup();
}
module_init(sky2_init_module);