wil6210: more debug info for vring

print used/available counters on debugfs;
print to dmesg when Tx vring becomes empty

This aids with performance investigation

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/wil6210/debugfs.c b/drivers/net/wireless/ath/wil6210/debugfs.c
index 4fb3375..d90aa28 100644 (file)
--- a/drivers/net/wireless/ath/wil6210/debugfs.c
+++ b/drivers/net/wireless/ath/wil6210/debugfs.c
@@ -72,11 +72,16 @@ static int wil_vring_debugfs_show(struct seq_file *s, void *data)
                if (vring->va) {
                        int cid = wil->vring2cid_tid[i][0];
                        int tid = wil->vring2cid_tid[i][1];
+                       u32 swhead = vring->swhead;
+                       u32 swtail = vring->swtail;
+                       int used = (vring->size + swhead - swtail)
+                                  % vring->size;
+                       int avail = vring->size - used - 1;
                        char name[10];
                        snprintf(name, sizeof(name), "tx_%2d", i);
 
-                       seq_printf(s, "\n%pM CID %d TID %d\n",
-                                  wil->sta[cid].addr, cid, tid);
+                       seq_printf(s, "\n%pM CID %d TID %d [%3d|%3d]\n",
+                                  wil->sta[cid].addr, cid, tid, used, avail);
                        wil_print_vring(s, wil, name, vring, '_', 'H');
                }
        }

diff --git a/drivers/net/wireless/ath/wil6210/txrx.c b/drivers/net/wireless/ath/wil6210/txrx.c
index 0784ef3..c08d041 100644 (file)
--- a/drivers/net/wireless/ath/wil6210/txrx.c
+++ b/drivers/net/wireless/ath/wil6210/txrx.c
@@ -1132,6 +1132,10 @@ int wil_tx_complete(struct wil6210_priv *wil, int ringid)
                        done++;
                }
        }
+
+       if (wil_vring_is_empty(vring))
+               wil_dbg_txrx(wil, "Ring[%2d] empty\n", ringid);
+
        if (wil_vring_avail_tx(vring) > wil_vring_wmark_high(vring))
                netif_tx_wake_all_queues(wil_to_ndev(wil));