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Commit 3a85543e authored by Vladimir Kondratiev's avatar Vladimir Kondratiev Committed by John W. Linville
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wil6210: [DEBUG] allow to query Rx and all Tx VRING descriptors 



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: default avatarVladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 1647f12f

drivers/net/wireless/ath/wil6210/debugfs.c

+32 −8
Original line number Diff line number Diff line
@@ -26,6 +26,8 @@ 
/* Nasty hack. Better have per device instances */

static u32 mem_addr;

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,

			    const char *name, struct vring *vring)
@@ -390,25 +392,39 @@ static const struct file_operations fops_reset = { 
	.write = wil_write_file_reset,

	.open  = simple_open,

};

/*---------Tx descriptor------------*/



/*---------Tx/Rx descriptor------------*/

static int wil_txdesc_debugfs_show(struct seq_file *s, void *data)

{

	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) {

		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;

	}



	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 =

				&(vring->va[dbg_txdesc_index].tx);

		volatile u32 *u = (volatile u32 *)d;

		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",

			   u[0], u[1], u[2], u[3]);

		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");

	} 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);

	}
@@ -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("vrings", S_IRUGO, dbg, wil, &fops_vring);

	debugfs_create_file("txdesc", S_IRUGO, dbg, wil, &fops_txdesc);

	debugfs_create_u32("txdesc_index", S_IRUGO | S_IWUSR, dbg,

	debugfs_create_file("desc", S_IRUGO, dbg, wil, &fops_txdesc);

	debugfs_create_u32("desc_index", S_IRUGO | S_IWUSR, dbg,

			   &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("ssid", S_IRUGO | S_IWUSR, dbg, wil, &fops_ssid);

	debugfs_create_u32("secure_pcp", S_IRUGO | S_IWUSR, dbg,