diff options
| -rw-r--r-- | drivers/net/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/net/skge.c | 143 | ||||
| -rw-r--r-- | drivers/net/skge.h | 3 |
3 files changed, 156 insertions, 0 deletions
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index 8f99a06..83d52c8 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -2173,6 +2173,16 @@ config SKGE To compile this driver as a module, choose M here: the module will be called skge. This is recommended. +config SKGE_DEBUG + bool "Debugging interface" + depends on SKGE && DEBUG_FS + help + This option adds the ability to dump driver state for debugging. + The file debugfs/skge/ethX displays the state of the internal + transmit and receive rings. + + If unsure, say N. + config SKY2 tristate "SysKonnect Yukon2 support" depends on PCI diff --git a/drivers/net/skge.c b/drivers/net/skge.c index 953f802..cf7d79b 100644 --- a/drivers/net/skge.c +++ b/drivers/net/skge.c @@ -36,6 +36,8 @@ #include <linux/delay.h> #include <linux/crc32.h> #include <linux/dma-mapping.h> +#include <linux/debugfs.h> +#include <linux/seq_file.h> #include <linux/mii.h> #include <asm/irq.h> @@ -3676,6 +3678,145 @@ static int skge_reset(struct skge_hw *hw) return 0; } + +#ifdef CONFIG_SKGE_DEBUG + +static struct dentry *skge_debug; + +static int skge_debug_show(struct seq_file *seq, void *v) +{ + struct net_device *dev = seq->private; + const struct skge_port *skge = netdev_priv(dev); + const struct skge_hw *hw = skge->hw; + const struct skge_element *e; + + if (!netif_running(dev)) + return -ENETDOWN; + + seq_printf(seq, "IRQ src=%x mask=%x\n", skge_read32(hw, B0_ISRC), + skge_read32(hw, B0_IMSK)); + + seq_printf(seq, "Tx Ring: (%d)\n", skge_avail(&skge->tx_ring)); + for (e = skge->tx_ring.to_clean; e != skge->tx_ring.to_use; e = e->next) { + const struct skge_tx_desc *t = e->desc; + seq_printf(seq, "%#x dma=%#x%08x %#x csum=%#x/%x/%x\n", + t->control, t->dma_hi, t->dma_lo, t->status, + t->csum_offs, t->csum_write, t->csum_start); + } + + seq_printf(seq, "\nRx Ring: \n"); + for (e = skge->rx_ring.to_clean; ; e = e->next) { + const struct skge_rx_desc *r = e->desc; + + if (r->control & BMU_OWN) + break; + + seq_printf(seq, "%#x dma=%#x%08x %#x %#x csum=%#x/%x\n", + r->control, r->dma_hi, r->dma_lo, r->status, + r->timestamp, r->csum1, r->csum1_start); + } + + return 0; +} + +static int skge_debug_open(struct inode *inode, struct file *file) +{ + return single_open(file, skge_debug_show, inode->i_private); +} + +static const struct file_operations skge_debug_fops = { + .owner = THIS_MODULE, + .open = skge_debug_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +/* + * Use network device events to create/remove/rename + * debugfs file entries + */ +static int skge_device_event(struct notifier_block *unused, + unsigned long event, void *ptr) +{ + struct net_device *dev = ptr; + struct skge_port *skge; + struct dentry *d; + + if (dev->open != &skge_up || !skge_debug) + goto done; + + skge = netdev_priv(dev); + switch(event) { + case NETDEV_CHANGENAME: + if (skge->debugfs) { + d = debugfs_rename(skge_debug, skge->debugfs, + skge_debug, dev->name); + if (d) + skge->debugfs = d; + else { + pr_info(PFX "%s: rename failed\n", dev->name); + debugfs_remove(skge->debugfs); + } + } + break; + + case NETDEV_GOING_DOWN: + if (skge->debugfs) { + debugfs_remove(skge->debugfs); + skge->debugfs = NULL; + } + break; + + case NETDEV_UP: + d = debugfs_create_file(dev->name, S_IRUGO, + skge_debug, dev, + &skge_debug_fops); + if (!d || IS_ERR(d)) + pr_info(PFX "%s: debugfs create failed\n", + dev->name); + else + skge->debugfs = d; + break; + } + +done: + return NOTIFY_DONE; +} + +static struct notifier_block skge_notifier = { + .notifier_call = skge_device_event, +}; + + +static __init void skge_debug_init(void) +{ + struct dentry *ent; + + ent = debugfs_create_dir("skge", NULL); + if (!ent || IS_ERR(ent)) { + pr_info(PFX "debugfs create directory failed\n"); + return; + } + + skge_debug = ent; + register_netdevice_notifier(&skge_notifier); +} + +static __exit void skge_debug_cleanup(void) +{ + if (skge_debug) { + unregister_netdevice_notifier(&skge_notifier); + debugfs_remove(skge_debug); + skge_debug = NULL; + } +} + +#else +#define skge_debug_init() +#define skge_debug_cleanup() +#endif + /* Initialize network device */ static struct net_device *skge_devinit(struct skge_hw *hw, int port, int highmem) @@ -4040,12 +4181,14 @@ static struct pci_driver skge_driver = { static int __init skge_init_module(void) { + skge_debug_init(); return pci_register_driver(&skge_driver); } static void __exit skge_cleanup_module(void) { pci_unregister_driver(&skge_driver); + skge_debug_cleanup(); } module_init(skge_init_module); diff --git a/drivers/net/skge.h b/drivers/net/skge.h index 5175424..17caccb 100644 --- a/drivers/net/skge.h +++ b/drivers/net/skge.h @@ -2469,6 +2469,9 @@ struct skge_port { void *mem; /* PCI memory for rings */ dma_addr_t dma; unsigned long mem_size; +#ifdef CONFIG_SKGE_DEBUG + struct dentry *debugfs; +#endif }; |
