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wil6210: [DEBUG] allow to query Rx and all Tx VRING descriptors

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Expand debug capabilities to query all Tx/Rx descriptors. Usefull to analyse
various hardware/software stall situations. Printed is whole descriptor content
and the frame itself.

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Vladimir Kondratiev
2014-02-27 16:20:41 +02:00
committed by John W. Linville
parent 1647f12f1b
commit 3a85543e9f
1 changed files with 32 additions and 8 deletions
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38
drivers/net/wireless/ath/wil6210/debugfs.c
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@@ -26,6 +26,8 @@
/* Nasty hack. Better have per device instances */ /* Nasty hack. Better have per device instances */
static u32 mem_addr; static u32 mem_addr;
static u32 dbg_txdesc_index; static u32 dbg_txdesc_index;
static u32 dbg_vring_index; /* 25 for Rx, 0..24 for Tx */
#define WIL_DBG_VRING_INDEX_RX (WIL6210_MAX_TX_RINGS + 1)
static void wil_print_vring(struct seq_file *s, struct wil6210_priv *wil, static void wil_print_vring(struct seq_file *s, struct wil6210_priv *wil,
const char *name, struct vring *vring) const char *name, struct vring *vring)
@@ -390,25 +392,39 @@ static const struct file_operations fops_reset = {
.write = wil_write_file_reset, .write = wil_write_file_reset,
.open = simple_open, .open = simple_open,
}; };
/*---------Tx descriptor------------*/
/*---------Tx/Rx descriptor------------*/
static int wil_txdesc_debugfs_show(struct seq_file *s, void *data) static int wil_txdesc_debugfs_show(struct seq_file *s, void *data)
{ {
struct wil6210_priv *wil = s->private; struct wil6210_priv *wil = s->private;
struct vring *vring = &(wil->vring_tx[0]); struct vring *vring;
if (dbg_vring_index <= WIL6210_MAX_TX_RINGS)
vring = &(wil->vring_tx[dbg_vring_index]);
else
vring = &wil->vring_rx;
if (!vring->va) { if (!vring->va) {
seq_printf(s, "No Tx VRING\n"); if (dbg_vring_index <= WIL6210_MAX_TX_RINGS)
seq_printf(s, "No Tx[%2d] VRING\n", dbg_vring_index);
else
seq_puts(s, "No Rx VRING\n");
return 0; return 0;
} }
if (dbg_txdesc_index < vring->size) { if (dbg_txdesc_index < vring->size) {
/* use struct vring_tx_desc for Rx as well,
* only field used, .dma.length, is the same
*/
volatile struct vring_tx_desc *d = volatile struct vring_tx_desc *d =
&(vring->va[dbg_txdesc_index].tx); &(vring->va[dbg_txdesc_index].tx);
volatile u32 *u = (volatile u32 *)d; volatile u32 *u = (volatile u32 *)d;
struct sk_buff *skb = vring->ctx[dbg_txdesc_index].skb; struct sk_buff *skb = vring->ctx[dbg_txdesc_index].skb;
seq_printf(s, "Tx[%3d] = {\n", dbg_txdesc_index); if (dbg_vring_index <= WIL6210_MAX_TX_RINGS)
seq_printf(s, "Tx[%2d][%3d] = {\n", dbg_vring_index,
dbg_txdesc_index);
else
seq_printf(s, "Rx[%3d] = {\n", dbg_txdesc_index);
seq_printf(s, " MAC = 0x%08x 0x%08x 0x%08x 0x%08x\n", seq_printf(s, " MAC = 0x%08x 0x%08x 0x%08x 0x%08x\n",
u[0], u[1], u[2], u[3]); u[0], u[1], u[2], u[3]);
seq_printf(s, " DMA = 0x%08x 0x%08x 0x%08x 0x%08x\n", seq_printf(s, " DMA = 0x%08x 0x%08x 0x%08x 0x%08x\n",
@@ -439,7 +455,12 @@ static int wil_txdesc_debugfs_show(struct seq_file *s, void *data)
} }
seq_printf(s, "}\n"); seq_printf(s, "}\n");
} else { } else {
seq_printf(s, "TxDesc index (%d) >= size (%d)\n", if (dbg_vring_index <= WIL6210_MAX_TX_RINGS)
seq_printf(s, "[%2d] TxDesc index (%d) >= size (%d)\n",
dbg_vring_index, dbg_txdesc_index,
vring->size);
else
seq_printf(s, "RxDesc index (%d) >= size (%d)\n",
dbg_txdesc_index, vring->size); dbg_txdesc_index, vring->size);
} }
@@ -581,9 +602,12 @@ int wil6210_debugfs_init(struct wil6210_priv *wil)
debugfs_create_file("mbox", S_IRUGO, dbg, wil, &fops_mbox); debugfs_create_file("mbox", S_IRUGO, dbg, wil, &fops_mbox);
debugfs_create_file("vrings", S_IRUGO, dbg, wil, &fops_vring); debugfs_create_file("vrings", S_IRUGO, dbg, wil, &fops_vring);
debugfs_create_file("txdesc", S_IRUGO, dbg, wil, &fops_txdesc); debugfs_create_file("desc", S_IRUGO, dbg, wil, &fops_txdesc);
debugfs_create_u32("txdesc_index", S_IRUGO | S_IWUSR, dbg, debugfs_create_u32("desc_index", S_IRUGO | S_IWUSR, dbg,
&dbg_txdesc_index); &dbg_txdesc_index);
debugfs_create_u32("vring_index", S_IRUGO | S_IWUSR, dbg,
&dbg_vring_index);
debugfs_create_file("bf", S_IRUGO, dbg, wil, &fops_bf); debugfs_create_file("bf", S_IRUGO, dbg, wil, &fops_bf);
debugfs_create_file("ssid", S_IRUGO | S_IWUSR, dbg, wil, &fops_ssid); debugfs_create_file("ssid", S_IRUGO | S_IWUSR, dbg, wil, &fops_ssid);
debugfs_create_u32("secure_pcp", S_IRUGO | S_IWUSR, dbg, debugfs_create_u32("secure_pcp", S_IRUGO | S_IWUSR, dbg,