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Commit b0907994 authored by Dedy Lansky's avatar Dedy Lansky
Browse files

wil6210: enhancements for descriptor and status ring debugfs 



Add printing of hwhead as part of desc ring and status ring debugfs.
Validate wil->rx_buff_mgmt and ring->ctx arrays before accessing them.
Dump Tx descriptor content even when it indicates invalid buff_id.

Change-Id: I3ffc9456e8245865ba4e883aec1d2a03c0c9eb2e
Signed-off-by: default avatarDedy Lansky <dlansky@codeaurora.org>
parent 5c5eda31

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

+40 −12
Original line number Diff line number Diff line
@@ -52,6 +52,8 @@ static void wil_print_desc_edma(struct seq_file *s, struct wil6210_priv *wil, 
			&ring->va[idx].rx.enhanced;

		u16 buff_id = le16_to_cpu(rx_d->mac.buff_id);



		if (wil->rx_buff_mgmt.buff_arr &&

		    wil_val_in_range(buff_id, 0, wil->rx_buff_mgmt.size))

			has_skb = wil->rx_buff_mgmt.buff_arr[buff_id].skb;

		seq_printf(s, "%c", (has_skb) ? _h : _s);

	} else {
@@ -60,9 +62,9 @@ static void wil_print_desc_edma(struct seq_file *s, struct wil6210_priv *wil, 
			&ring->va[idx].tx.enhanced;



		num_of_descs = (u8)d->mac.d[2];

		has_skb = ring->ctx[idx].skb;

		has_skb = ring->ctx && ring->ctx[idx].skb;

		if (num_of_descs >= 1)

			seq_printf(s, "%c", ring->ctx[idx].skb ? _h : _s);

			seq_printf(s, "%c", has_skb ? _h : _s);

		else

			/* num_of_descs == 0, it's a frag in a list of descs */

			seq_printf(s, "%c", has_skb ? 'h' : _s);
@@ -73,7 +75,7 @@ static void wil_print_ring(struct seq_file *s, struct wil6210_priv *wil, 
			   const char *name, struct wil_ring *ring,

			   char _s, char _h)

{

	void __iomem *x = wmi_addr(wil, ring->hwtail);

	void __iomem *x;

	u32 v;



	seq_printf(s, "RING %s = {\n", name);
@@ -85,7 +87,21 @@ static void wil_print_ring(struct seq_file *s, struct wil6210_priv *wil, 
	else

		seq_printf(s, "  swtail = %d\n", ring->swtail);

	seq_printf(s, "  swhead = %d\n", ring->swhead);

	if (wil->use_enhanced_dma_hw) {

		int ring_id = ring->is_rx ?

			WIL_RX_DESC_RING_ID : ring - wil->ring_tx;

		/* SUBQ_CONS is a table of 32 entries, one for each Q pair.

		 * lower 16bits are for even ring_id and upper 16bits are for

		 * odd ring_id

		 */

		x = wmi_addr(wil, RGF_DMA_SCM_SUBQ_CONS + 4 * (ring_id / 2));

		v = readl_relaxed(x);



		v = (ring_id % 2 ? (v >> 16) : (v & 0xffff));

		seq_printf(s, "  hwhead = %u\n", v);

	}

	seq_printf(s, "  hwtail = [0x%08x] -> ", ring->hwtail);

	x = wmi_addr(wil, ring->hwtail);

	if (x) {

		v = readl(x);

		seq_printf(s, "0x%08x = %d\n", v, v);
@@ -188,7 +204,7 @@ static const struct file_operations fops_ring = { 
static void wil_print_sring(struct seq_file *s, struct wil6210_priv *wil,

			    struct wil_status_ring *sring)

{

	void __iomem *x = wmi_addr(wil, sring->hwtail);

	void __iomem *x;

	int sring_idx = sring - wil->srings;

	u32 v;
@@ -199,7 +215,19 @@ static void wil_print_sring(struct seq_file *s, struct wil6210_priv *wil, 
	seq_printf(s, "  size   = %d\n", sring->size);

	seq_printf(s, "  elem_size   = %zu\n", sring->elem_size);

	seq_printf(s, "  swhead = %d\n", sring->swhead);

	if (wil->use_enhanced_dma_hw) {

		/* COMPQ_PROD is a table of 32 entries, one for each Q pair.

		 * lower 16bits are for even ring_id and upper 16bits are for

		 * odd ring_id

		 */

		x = wmi_addr(wil, RGF_DMA_SCM_COMPQ_PROD + 4 * (sring_idx / 2));

		v = readl_relaxed(x);



		v = (sring_idx % 2 ? (v >> 16) : (v & 0xffff));

		seq_printf(s, "  hwhead = %u\n", v);

	}

	seq_printf(s, "  hwtail = [0x%08x] -> ", sring->hwtail);

	x = wmi_addr(wil, sring->hwtail);

	if (x) {

		v = readl_relaxed(x);

		seq_printf(s, "0x%08x = %d\n", v, v);
@@ -1124,18 +1152,17 @@ static int wil_txdesc_debugfs_show(struct seq_file *s, void *data) 


	if (wil->use_enhanced_dma_hw) {

		if (tx) {

			skb = ring->ctx[txdesc_idx].skb;

		} else {

			skb = ring->ctx ? ring->ctx[txdesc_idx].skb : NULL;

		} else if (wil->rx_buff_mgmt.buff_arr) {

			struct wil_rx_enhanced_desc *rx_d =

				(struct wil_rx_enhanced_desc *)

				&ring->va[txdesc_idx].rx.enhanced;

			u16 buff_id = le16_to_cpu(rx_d->mac.buff_id);



			if (!wil_val_in_range(buff_id, 0,

					      wil->rx_buff_mgmt.size)) {

					      wil->rx_buff_mgmt.size))

				seq_printf(s, "invalid buff_id %d\n", buff_id);

				return 0;

			}

			else

				skb = wil->rx_buff_mgmt.buff_arr[buff_id].skb;

		}

	} else {
@@ -1180,7 +1207,7 @@ static int wil_status_msg_debugfs_show(struct seq_file *s, void *data) 
	struct wil6210_priv *wil = s->private;

	int sring_idx = dbg_sring_index;

	struct wil_status_ring *sring;

	bool tx = sring_idx == wil->tx_sring_idx ? 1 : 0;

	bool tx;

	u32 status_msg_idx = dbg_status_msg_index;

	u32 *u;
@@ -1190,6 +1217,7 @@ static int wil_status_msg_debugfs_show(struct seq_file *s, void *data) 
	}



	sring = &wil->srings[sring_idx];

	tx = !sring->is_rx;



	if (!sring->va) {

		seq_printf(s, "No %cX status ring\n", tx ? 'T' : 'R');

drivers/net/wireless/ath/wil6210/wil6210.h

+5 −0
Original line number Diff line number Diff line
@@ -327,6 +327,11 @@ struct RGF_ICR { 
	#define BIT_BOOT_FROM_ROM		BIT(31)



/* eDMA */

#define RGF_SCM_PTRS_SUBQ_RD_PTR	(0x8b4000)

#define RGF_SCM_PTRS_COMPQ_RD_PTR	(0x8b4100)

#define RGF_DMA_SCM_SUBQ_CONS		(0x8b60ec)

#define RGF_DMA_SCM_COMPQ_PROD		(0x8b616c)



#define RGF_INT_COUNT_ON_SPECIAL_EVT	(0x8b62d8)



#define RGF_INT_CTRL_INT_GEN_CFG_0	(0x8bc000)