brcmfmac: add debugfs entry for msgbuf statistics

Expose ring buffer read/write pointers and other useful statistics
through debugfs.

Reviewed-by: Arend Van Spriel <arend@broadcom.com>
Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Franky Lin <frankyl@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c b/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c
index 898c3801e65874647694d281614e146379da8822..7b2136c9badb5ce984d776bb11aa317da6083f9e 100644 (file)
--- a/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c
@@ -1360,6 +1360,60 @@ void brcmf_msgbuf_delete_flowring(struct brcmf_pub *drvr, u8 flowid)
        }
 }
 
+#ifdef DEBUG
+static int brcmf_msgbuf_stats_read(struct seq_file *seq, void *data)
+{
+       struct brcmf_bus *bus_if = dev_get_drvdata(seq->private);
+       struct brcmf_pub *drvr = bus_if->drvr;
+       struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
+       struct brcmf_commonring *commonring;
+       u16 i;
+       struct brcmf_flowring_ring *ring;
+       struct brcmf_flowring_hash *hash;
+
+       commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_CONTROL_SUBMIT];
+       seq_printf(seq, "h2d_ctl_submit: rp %4u, wp %4u, depth %4u\n",
+                  commonring->r_ptr, commonring->w_ptr, commonring->depth);
+       commonring = msgbuf->commonrings[BRCMF_H2D_MSGRING_RXPOST_SUBMIT];
+       seq_printf(seq, "h2d_rx_submit:  rp %4u, wp %4u, depth %4u\n",
+                  commonring->r_ptr, commonring->w_ptr, commonring->depth);
+       commonring = msgbuf->commonrings[BRCMF_D2H_MSGRING_CONTROL_COMPLETE];
+       seq_printf(seq, "d2h_ctl_cmplt:  rp %4u, wp %4u, depth %4u\n",
+                  commonring->r_ptr, commonring->w_ptr, commonring->depth);
+       commonring = msgbuf->commonrings[BRCMF_D2H_MSGRING_TX_COMPLETE];
+       seq_printf(seq, "d2h_tx_cmplt:   rp %4u, wp %4u, depth %4u\n",
+                  commonring->r_ptr, commonring->w_ptr, commonring->depth);
+       commonring = msgbuf->commonrings[BRCMF_D2H_MSGRING_RX_COMPLETE];
+       seq_printf(seq, "d2h_rx_cmplt:   rp %4u, wp %4u, depth %4u\n",
+                  commonring->r_ptr, commonring->w_ptr, commonring->depth);
+
+       seq_printf(seq, "\nh2d_flowrings: depth %u\n",
+                  BRCMF_H2D_TXFLOWRING_MAX_ITEM);
+       seq_puts(seq, "Active flowrings:\n");
+       hash = msgbuf->flow->hash;
+       for (i = 0; i < msgbuf->flow->nrofrings; i++) {
+               if (!msgbuf->flow->rings[i])
+                       continue;
+               ring = msgbuf->flow->rings[i];
+               if (ring->status != RING_OPEN)
+                       continue;
+               commonring = msgbuf->flowrings[i];
+               hash = &msgbuf->flow->hash[ring->hash_id];
+               seq_printf(seq, "id %3u: rp %4u, wp %4u, qlen %4u, blocked %u\n"
+                               "        ifidx %u, fifo %u, da %pM\n",
+                               i, commonring->r_ptr, commonring->w_ptr,
+                               skb_queue_len(&ring->skblist), ring->blocked,
+                               hash->ifidx, hash->fifo, hash->mac);
+       }
+
+       return 0;
+}
+#else
+static int brcmf_msgbuf_stats_read(struct seq_file *seq, void *data)
+{
+       return 0;
+}
+#endif
 
 int brcmf_proto_msgbuf_attach(struct brcmf_pub *drvr)
 {
@@ -1460,6 +1514,8 @@ int brcmf_proto_msgbuf_attach(struct brcmf_pub *drvr)
        spin_lock_init(&msgbuf->flowring_work_lock);
        INIT_LIST_HEAD(&msgbuf->work_queue);
 
+       brcmf_debugfs_add_entry(drvr, "msgbuf_stats", brcmf_msgbuf_stats_read);
+
        return 0;
 
 fail: