ramips: raeth: show interrupt statistics in debugfs

SVN-Revision: 30681

diff --git a/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_debugfs.c b/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_debugfs.c
index 8e06b744aa33ccaa88c1b5031b5e870ab67e0166..20afcf5028ab21512904f4dc3f52a6f13ccf7079 100644 (file)
--- a/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_debugfs.c
+++ b/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_debugfs.c
@@ -9,12 +9,87 @@
  */
 
 #include <linux/debugfs.h>
+#include <linux/module.h>
 #include <linux/phy.h>
 
 #include "ramips_eth.h"
 
 static struct dentry *raeth_debugfs_root;
 
+static int raeth_debugfs_generic_open(struct inode *inode, struct file *file)
+{
+       file->private_data = inode->i_private;
+       return 0;
+}
+
+void raeth_debugfs_update_int_stats(struct raeth_priv *re, u32 status)
+{
+       re->debug.int_stats.total += !!status;
+
+       re->debug.int_stats.rx_delayed += !!(status & RAMIPS_RX_DLY_INT);
+       re->debug.int_stats.rx_done0 += !!(status & RAMIPS_RX_DONE_INT0);
+       re->debug.int_stats.rx_coherent += !!(status & RAMIPS_RX_COHERENT);
+
+       re->debug.int_stats.tx_delayed += !!(status & RAMIPS_TX_DLY_INT);
+       re->debug.int_stats.tx_done0 += !!(status & RAMIPS_TX_DONE_INT0);
+       re->debug.int_stats.tx_done1 += !!(status & RAMIPS_TX_DONE_INT1);
+       re->debug.int_stats.tx_done2 += !!(status & RAMIPS_TX_DONE_INT2);
+       re->debug.int_stats.tx_done3 += !!(status & RAMIPS_TX_DONE_INT3);
+       re->debug.int_stats.tx_coherent += !!(status & RAMIPS_TX_COHERENT);
+
+       re->debug.int_stats.pse_fq_empty += !!(status & RAMIPS_PSE_FQ_EMPTY);
+       re->debug.int_stats.pse_p0_fc += !!(status & RAMIPS_PSE_P0_FC);
+       re->debug.int_stats.pse_p1_fc += !!(status & RAMIPS_PSE_P1_FC);
+       re->debug.int_stats.pse_p2_fc += !!(status & RAMIPS_PSE_P2_FC);
+       re->debug.int_stats.pse_buf_drop += !!(status & RAMIPS_PSE_BUF_DROP);
+}
+
+static ssize_t read_file_int_stats(struct file *file, char __user *user_buf,
+                                  size_t count, loff_t *ppos)
+{
+#define PR_INT_STAT(_label, _field)                                    \
+       len += snprintf(buf + len, sizeof(buf) - len,                   \
+               "%-18s: %10lu\n", _label, re->debug.int_stats._field);
+
+       struct raeth_priv *re = file->private_data;
+       char buf[512];
+       unsigned int len = 0;
+       unsigned long flags;
+
+       spin_lock_irqsave(&re->page_lock, flags);
+
+       PR_INT_STAT("RX Delayed", rx_delayed);
+       PR_INT_STAT("RX Done 0", rx_done0);
+       PR_INT_STAT("RX Coherent", rx_coherent);
+
+       PR_INT_STAT("TX Delayed", tx_delayed);
+       PR_INT_STAT("TX Done 0", tx_done0);
+       PR_INT_STAT("TX Done 1", tx_done1);
+       PR_INT_STAT("TX Done 2", tx_done2);
+       PR_INT_STAT("TX Done 3", tx_done3);
+       PR_INT_STAT("TX Coherent", tx_coherent);
+
+       PR_INT_STAT("PSE FQ empty", pse_fq_empty);
+       PR_INT_STAT("CDMA Flow control", pse_p0_fc);
+       PR_INT_STAT("GDMA1 Flow control", pse_p1_fc);
+       PR_INT_STAT("GDMA2 Flow control", pse_p2_fc);
+       PR_INT_STAT("PSE discard", pse_buf_drop);
+
+       len += snprintf(buf + len, sizeof(buf) - len, "\n");
+       PR_INT_STAT("Total", total);
+
+       spin_unlock_irqrestore(&re->page_lock, flags);
+
+       return simple_read_from_buffer(user_buf, count, ppos, buf, len);
+#undef PR_INT_STAT
+}
+
+static const struct file_operations raeth_fops_int_stats = {
+       .open   = raeth_debugfs_generic_open,
+       .read   = read_file_int_stats,
+       .owner  = THIS_MODULE
+};
+
 void raeth_debugfs_exit(struct raeth_priv *re)
 {
        debugfs_remove_recursive(re->debug.debugfs_dir);
@@ -27,6 +102,9 @@ int raeth_debugfs_init(struct raeth_priv *re)
        if (!re->debug.debugfs_dir)
                return -ENOMEM;
 
+       debugfs_create_file("int_stats", S_IRUGO, re->debug.debugfs_dir,
+                           re, &raeth_fops_int_stats);
+
        return 0;
 }
 

diff --git a/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_eth.h b/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_eth.h
index ea3e9234038056f23df3a133af3ed48e041aeb8c..c8df434a46758e59ac5669487a2f1d155d25c3eb 100644 (file)
--- a/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_eth.h
+++ b/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_eth.h
@@ -213,8 +213,30 @@ struct ramips_tx_dma {
        unsigned int txd4;
 } __packed __aligned(4);
 
+struct raeth_int_stats {
+       unsigned long           rx_delayed;
+       unsigned long           tx_delayed;
+       unsigned long           rx_done0;
+       unsigned long           tx_done0;
+       unsigned long           tx_done1;
+       unsigned long           tx_done2;
+       unsigned long           tx_done3;
+       unsigned long           rx_coherent;
+       unsigned long           tx_coherent;
+
+       unsigned long           pse_fq_empty;
+       unsigned long           pse_p0_fc;
+       unsigned long           pse_p1_fc;
+       unsigned long           pse_p2_fc;
+       unsigned long           pse_buf_drop;
+
+       unsigned long           total;
+};
+
 struct raeth_debug {
        struct dentry           *debugfs_dir;
+
+       struct raeth_int_stats  int_stats;
 };
 
 struct raeth_priv
@@ -258,11 +280,14 @@ int raeth_debugfs_root_init(void);
 void raeth_debugfs_root_exit(void);
 int raeth_debugfs_init(struct raeth_priv *re);
 void raeth_debugfs_exit(struct raeth_priv *re);
+void raeth_debugfs_update_int_stats(struct raeth_priv *re, u32 status);
 #else
 static inline int raeth_debugfs_root_init(void) { return 0; }
 static inline void raeth_debugfs_root_exit(void) {}
 static inline int raeth_debugfs_init(struct raeth_priv *re) { return 0; }
 static inline void raeth_debugfs_exit(struct raeth_priv *re) {}
+static inline void raeth_debugfs_update_int_stats(struct raeth_priv *re,
+                                                 u32 status) {}
 #endif /* CONFIG_NET_RAMIPS_DEBUG_FS */
 
 #endif /* RAMIPS_ETH_H */

diff --git a/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_main.c b/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_main.c
index 26c98d85ad48afe06b4025558fe9becb82c5ceb2..01945872eb9edc87175a879bc02c53f5610436f1 100644 (file)
--- a/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_main.c
+++ b/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_main.c
@@ -769,6 +769,8 @@ ramips_eth_irq(int irq, void *dev)
                tasklet_schedule(&re->tx_housekeeping_tasklet);
        }
 
+       raeth_debugfs_update_int_stats(re, fe_int);
+
        return IRQ_HANDLED;
 }