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-rw-r--r--target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_debugfs.c92
1 files changed, 92 insertions, 0 deletions
diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_debugfs.c b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_debugfs.c
index 47b7cbd84f..e41162a792 100644
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_debugfs.c
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_debugfs.c
@@ -149,6 +149,94 @@ static const struct file_operations ag71xx_fops_napi_stats = {
.owner = THIS_MODULE
};
+#define DESC_PRINT_LEN 64
+
+static ssize_t read_file_ring(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos,
+ struct ag71xx *ag,
+ struct ag71xx_ring *ring,
+ unsigned ring_size,
+ unsigned desc_reg)
+{
+ char *buf;
+ unsigned int buflen;
+ unsigned int len = 0;
+ unsigned long flags;
+ ssize_t ret;
+ int curr;
+ int dirty;
+ u32 desc_hw;
+ int i;
+
+ buflen = (ring_size * DESC_PRINT_LEN);
+ buf = kmalloc(buflen, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ len += snprintf(buf + len, buflen - len,
+ "Idx ... %-8s %-8s %-8s %-8s . %-10s\n",
+ "desc", "next", "data", "ctrl", "timestamp");
+
+ spin_lock_irqsave(&ag->lock, flags);
+
+ curr = (ring->curr % ring_size);
+ dirty = (ring->dirty % ring_size);
+ desc_hw = ag71xx_rr(ag, desc_reg);
+ for (i = 0; i < ring_size; i++) {
+ struct ag71xx_buf *ab = &ring->buf[i];
+
+ len += snprintf(buf + len, buflen - len,
+ "%3d %c%c%c %08x %08x %08x %08x %c %10lu\n",
+ i,
+ (i == curr) ? 'C' : ' ',
+ (i == dirty) ? 'D' : ' ',
+ (desc_hw == ab->desc_dma) ? 'H' : ' ',
+ ab->desc_dma,
+ ab->desc->next,
+ ab->desc->data,
+ ab->desc->ctrl,
+ (ab->desc->ctrl & DESC_EMPTY) ? 'E' : '*',
+ ab->timestamp);
+ }
+
+ spin_unlock_irqrestore(&ag->lock, flags);
+
+ ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);
+ kfree(buf);
+
+ return ret;
+}
+
+static ssize_t read_file_tx_ring(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct ag71xx *ag = file->private_data;
+
+ return read_file_ring(file, user_buf, count, ppos, ag, &ag->tx_ring,
+ AG71XX_TX_RING_SIZE, AG71XX_REG_TX_DESC);
+}
+
+static const struct file_operations ag71xx_fops_tx_ring = {
+ .open = ag71xx_debugfs_generic_open,
+ .read = read_file_tx_ring,
+ .owner = THIS_MODULE
+};
+
+static ssize_t read_file_rx_ring(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct ag71xx *ag = file->private_data;
+
+ return read_file_ring(file, user_buf, count, ppos, ag, &ag->rx_ring,
+ AG71XX_RX_RING_SIZE, AG71XX_REG_RX_DESC);
+}
+
+static const struct file_operations ag71xx_fops_rx_ring = {
+ .open = ag71xx_debugfs_generic_open,
+ .read = read_file_rx_ring,
+ .owner = THIS_MODULE
+};
+
void ag71xx_debugfs_exit(struct ag71xx *ag)
{
debugfs_remove_recursive(ag->debug.debugfs_dir);
@@ -165,6 +253,10 @@ int ag71xx_debugfs_init(struct ag71xx *ag)
ag, &ag71xx_fops_int_stats);
debugfs_create_file("napi_stats", S_IRUGO, ag->debug.debugfs_dir,
ag, &ag71xx_fops_napi_stats);
+ debugfs_create_file("tx_ring", S_IRUGO, ag->debug.debugfs_dir,
+ ag, &ag71xx_fops_tx_ring);
+ debugfs_create_file("rx_ring", S_IRUGO, ag->debug.debugfs_dir,
+ ag, &ag71xx_fops_rx_ring);
return 0;
}