iwlwifi: pcie: improve debugfs queue info

This adds need_update and write_actual to rx_queue and need_update
and an HCMD indicator to tx_queue.

On my card, rx_queue now looks like:

read: 181
write: 180
write_actual: 176
need_update: 0
free_count: 40
closed_rb_num: 181

tx_queue now looks like:

hwq 00: read=29 write=30 use=1 stop=0 need_update=0
hwq 01: read=0 write=0 use=1 stop=0 need_update=0
hwq 02: read=128 write=128 use=1 stop=0 need_update=0
hwq 03: read=0 write=0 use=1 stop=0 need_update=0
hwq 04: read=94 write=94 use=1 stop=0 need_update=0 HCMD
hwq 05: read=0 write=0 use=0 stop=0 need_update=0
hwq 06: read=0 write=0 use=0 stop=0 need_update=0
hwq 07: read=0 write=0 use=0 stop=0 need_update=0
hwq 08: read=0 write=0 use=0 stop=0 need_update=0
hwq 09: read=0 write=0 use=0 stop=0 need_update=0
hwq 10: read=0 write=0 use=0 stop=0 need_update=0
hwq 11: read=0 write=0 use=0 stop=0 need_update=0
hwq 12: read=0 write=0 use=0 stop=0 need_update=0
hwq 13: read=0 write=0 use=0 stop=0 need_update=0
hwq 14: read=0 write=0 use=0 stop=0 need_update=0
hwq 15: read=0 write=0 use=0 stop=0 need_update=0
hwq 16: read=0 write=0 use=0 stop=0 need_update=0
hwq 17: read=0 write=0 use=0 stop=0 need_update=0
hwq 18: read=0 write=0 use=0 stop=0 need_update=0
hwq 19: read=0 write=0 use=0 stop=0 need_update=0

This may help with debugging queue stalls.

Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --git a/drivers/net/wireless/iwlwifi/pcie/trans.c b/drivers/net/wireless/iwlwifi/pcie/trans.c
index 3ffac48..0480857 100644 (file)
--- a/drivers/net/wireless/iwlwifi/pcie/trans.c
+++ b/drivers/net/wireless/iwlwifi/pcie/trans.c
@@ -1573,10 +1573,12 @@ static ssize_t iwl_dbgfs_tx_queue_read(struct file *file,
                txq = &trans_pcie->txq[cnt];
                q = &txq->q;
                pos += scnprintf(buf + pos, bufsz - pos,
-                               "hwq %.2d: read=%u write=%u use=%d stop=%d\n",
+                               "hwq %.2d: read=%u write=%u use=%d stop=%d need_update=%d%s\n",
                                cnt, q->read_ptr, q->write_ptr,
                                !!test_bit(cnt, trans_pcie->queue_used),
-                               !!test_bit(cnt, trans_pcie->queue_stopped));
+                                !!test_bit(cnt, trans_pcie->queue_stopped),
+                                txq->need_update,
+                                (cnt == trans_pcie->cmd_queue ? " HCMD" : ""));
        }
        ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
        kfree(buf);
@@ -1598,6 +1600,10 @@ static ssize_t iwl_dbgfs_rx_queue_read(struct file *file,
                                                rxq->read);
        pos += scnprintf(buf + pos, bufsz - pos, "write: %u\n",
                                                rxq->write);
+       pos += scnprintf(buf + pos, bufsz - pos, "write_actual: %u\n",
+                                               rxq->write_actual);
+       pos += scnprintf(buf + pos, bufsz - pos, "need_update: %d\n",
+                                               rxq->need_update);
        pos += scnprintf(buf + pos, bufsz - pos, "free_count: %u\n",
                                                rxq->free_count);
        if (rxq->rb_stts) {