netdev - [Patch v1 net-next 03/10] net: ena: Improve error logging in driver

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Date:   Tue, 8 Jun 2021 19:01:11 +0300
From:   Shay Agroskin <shayagr@...zon.com>
To:     David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, <netdev@...r.kernel.org>
CC:     Shay Agroskin <shayagr@...zon.com>,
        "Woodhouse, David" <dwmw@...zon.com>,
        "Machulsky, Zorik" <zorik@...zon.com>,
        "Matushevsky, Alexander" <matua@...zon.com>,
        Saeed Bshara <saeedb@...zon.com>,
        "Wilson, Matt" <msw@...zon.com>,
        "Liguori, Anthony" <aliguori@...zon.com>,
        "Bshara, Nafea" <nafea@...zon.com>,
        "Belgazal, Netanel" <netanel@...zon.com>,
        "Saidi, Ali" <alisaidi@...zon.com>,
        "Herrenschmidt, Benjamin" <benh@...zon.com>,
        "Kiyanovski, Arthur" <akiyano@...zon.com>,
        "Dagan, Noam" <ndagan@...zon.com>
Subject: [Patch v1 net-next 03/10] net: ena: Improve error logging in driver

Add prints to improve logging of driver's errors.

Signed-off-by: Arthur Kiyanovski <akiyano@...zon.com>
Signed-off-by: Shay Agroskin <shayagr@...zon.com>
---
 drivers/net/ethernet/amazon/ena/ena_eth_com.c | 28 +++++++++++++++----
 1 file changed, 23 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_eth_com.c b/drivers/net/ethernet/amazon/ena/ena_eth_com.c
index 2aecd4c3de59..3d6f0a466a9e 100644
--- a/drivers/net/ethernet/amazon/ena/ena_eth_com.c
+++ b/drivers/net/ethernet/amazon/ena/ena_eth_com.c
@@ -154,8 +154,11 @@ static int ena_com_close_bounce_buffer(struct ena_com_io_sq *io_sq)
 	if (likely(pkt_ctrl->idx)) {
 		rc = ena_com_write_bounce_buffer_to_dev(io_sq,
 							pkt_ctrl->curr_bounce_buf);
-		if (unlikely(rc))
+		if (unlikely(rc)) {
+			netdev_err(ena_com_io_sq_to_ena_dev(io_sq)->net_device,
+				   "Failed to write bounce buffer to device\n");
 			return rc;
+		}
 
 		pkt_ctrl->curr_bounce_buf =
 			ena_com_get_next_bounce_buffer(&io_sq->bounce_buf_ctrl);
@@ -185,8 +188,11 @@ static int ena_com_sq_update_llq_tail(struct ena_com_io_sq *io_sq)
 	if (!pkt_ctrl->descs_left_in_line) {
 		rc = ena_com_write_bounce_buffer_to_dev(io_sq,
 							pkt_ctrl->curr_bounce_buf);
-		if (unlikely(rc))
+		if (unlikely(rc)) {
+			netdev_err(ena_com_io_sq_to_ena_dev(io_sq)->net_device,
+				   "Failed to write bounce buffer to device\n");
 			return rc;
+		}
 
 		pkt_ctrl->curr_bounce_buf =
 			ena_com_get_next_bounce_buffer(&io_sq->bounce_buf_ctrl);
@@ -406,8 +412,11 @@ int ena_com_prepare_tx(struct ena_com_io_sq *io_sq,
 	}
 
 	if (unlikely(io_sq->mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV &&
-		     !buffer_to_push))
+		     !buffer_to_push)) {
+		netdev_err(ena_com_io_sq_to_ena_dev(io_sq)->net_device,
+			   "Push header wasn't provided in LLQ mode\n");
 		return -EINVAL;
+	}
 
 	rc = ena_com_write_header_to_bounce(io_sq, buffer_to_push, header_len);
 	if (unlikely(rc))
@@ -423,6 +432,9 @@ int ena_com_prepare_tx(struct ena_com_io_sq *io_sq,
 	/* If the caller doesn't want to send packets */
 	if (unlikely(!num_bufs && !header_len)) {
 		rc = ena_com_close_bounce_buffer(io_sq);
+		if (rc)
+			netdev_err(ena_com_io_sq_to_ena_dev(io_sq)->net_device,
+				   "Failed to write buffers to LLQ\n");
 		*nb_hw_desc = io_sq->tail - start_tail;
 		return rc;
 	}
@@ -482,8 +494,11 @@ int ena_com_prepare_tx(struct ena_com_io_sq *io_sq,
 		/* The first desc share the same desc as the header */
 		if (likely(i != 0)) {
 			rc = ena_com_sq_update_tail(io_sq);
-			if (unlikely(rc))
+			if (unlikely(rc)) {
+				netdev_err(ena_com_io_sq_to_ena_dev(io_sq)->net_device,
+					   "Failed to update sq tail\n");
 				return rc;
+			}
 
 			desc = get_sq_desc(io_sq);
 			if (unlikely(!desc))
@@ -512,8 +527,11 @@ int ena_com_prepare_tx(struct ena_com_io_sq *io_sq,
 	desc->len_ctrl |= ENA_ETH_IO_TX_DESC_LAST_MASK;
 
 	rc = ena_com_sq_update_tail(io_sq);
-	if (unlikely(rc))
+	if (unlikely(rc)) {
+		netdev_err(ena_com_io_sq_to_ena_dev(io_sq)->net_device,
+			   "Failed to update sq tail of the last descriptor\n");
 		return rc;
+	}
 
 	rc = ena_com_close_bounce_buffer(io_sq);
 
-- 
2.25.1