{
struct ag71xx *ag = file->private_data;
struct ag71xx_napi_stats *stats = &ag->debug.napi_stats;
- char buf[2048];
+ char *buf;
+ unsigned int buflen;
unsigned int len = 0;
unsigned long rx_avg = 0;
unsigned long tx_avg = 0;
+ int ret;
int i;
+ buflen = 2048;
+ buf = kmalloc(buflen, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
if (stats->rx_count)
rx_avg = stats->rx_packets / stats->rx_count;
if (stats->tx_count)
tx_avg = stats->tx_packets / stats->tx_count;
- len += snprintf(buf + len, sizeof(buf) - len, "%3s %10s %10s\n",
+ len += snprintf(buf + len, buflen - len, "%3s %10s %10s\n",
"len", "rx", "tx");
for (i = 1; i <= AG71XX_NAPI_WEIGHT; i++)
- len += snprintf(buf + len, sizeof(buf) - len,
+ len += snprintf(buf + len, buflen - len,
"%3d: %10lu %10lu\n",
i, stats->rx[i], stats->tx[i]);
- len += snprintf(buf + len, sizeof(buf) - len, "\n");
+ len += snprintf(buf + len, buflen - len, "\n");
- len += snprintf(buf + len, sizeof(buf) - len, "%3s: %10lu %10lu\n",
+ len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
"sum", stats->rx_count, stats->tx_count);
- len += snprintf(buf + len, sizeof(buf) - len, "%3s: %10lu %10lu\n",
+ len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
"avg", rx_avg, tx_avg);
- len += snprintf(buf + len, sizeof(buf) - len, "%3s: %10lu %10lu\n",
+ len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
"max", stats->rx_packets_max, stats->tx_packets_max);
- len += snprintf(buf + len, sizeof(buf) - len, "%3s: %10lu %10lu\n",
+ len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
"pkt", stats->rx_packets, stats->tx_packets);
- return simple_read_from_buffer(user_buf, count, ppos, buf, len);
+ ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);
+ kfree(buf);
+
+ return ret;
}
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];
+ u32 desc_dma = ((u32) ring->descs_dma) + i * ring->desc_size;
+
+ 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 == desc_dma) ? 'H' : ' ',
+ 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(ag->debug.debugfs_napi_stats);
- debugfs_remove(ag->debug.debugfs_int_stats);
- debugfs_remove(ag->debug.debugfs_dir);
+ debugfs_remove_recursive(ag->debug.debugfs_dir);
}
int ag71xx_debugfs_init(struct ag71xx *ag)
ag->debug.debugfs_dir = debugfs_create_dir(ag->dev->name,
ag71xx_debugfs_root);
if (!ag->debug.debugfs_dir)
- goto err;
-
- ag->debug.debugfs_int_stats =
- debugfs_create_file("int_stats",
- S_IRUGO,
- ag->debug.debugfs_dir,
- ag,
- &ag71xx_fops_int_stats);
- if (!ag->debug.debugfs_int_stats)
- goto err;
-
- ag->debug.debugfs_napi_stats =
- debugfs_create_file("napi_stats",
- S_IRUGO,
- ag->debug.debugfs_dir,
- ag,
- &ag71xx_fops_napi_stats);
- if (!ag->debug.debugfs_napi_stats)
- goto err;
+ return -ENOMEM;
- return 0;
+ debugfs_create_file("int_stats", S_IRUGO, ag->debug.debugfs_dir,
+ 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);
-err:
- ag71xx_debugfs_exit(ag);
- return -ENOMEM;
+ return 0;
}
int ag71xx_debugfs_root_init(void)
projects / openwrt-10.03 / .git / blobdiff