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ar71xx: ag71xx: add debugfs entry for [rt]x_ring

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SVN-Revision: 26845
This commit is contained in:
Gabor Juhos 2011-05-07 12:40:34 +00:00
parent 2166432ba0
commit 8b67d748cb
1 changed files with 92 additions and 0 deletions
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92
target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_debugfs.c
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@ -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;
}