patch 'net/iavf: fix Rx data buffer size' has been queued to stable release 20.11.9

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 20.11.9

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 06/17/23. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/bluca/dpdk-stable

This queued commit can be viewed at:
https://github.com/bluca/dpdk-stable/commit/0bf4c1164997fe6330553ddf22e1b8451864e1ee

Thanks.

Luca Boccassi

---
>From 0bf4c1164997fe6330553ddf22e1b8451864e1ee Mon Sep 17 00:00:00 2001
From: Wenjun Wu <wenjun1.wu at intel.com>
Date: Fri, 14 Apr 2023 13:47:42 +0800
Subject: [PATCH] net/iavf: fix Rx data buffer size

[ upstream commit c5549f1d9b1bf2bf2b09517daf89c84fbf5b18e0 ]

According to hardware spec, the data buffer size should not
be greater than 16K - 128.

Fixes: 69dd4c3d0898 ("net/avf: enable queue and device")

Signed-off-by: Wenjun Wu <wenjun1.wu at intel.com>
Acked-by: Qi Zhang <qi.z.zhang at intel.com>
---
 drivers/net/iavf/iavf_rxtx.c | 1 +
 drivers/net/iavf/iavf_rxtx.h | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/drivers/net/iavf/iavf_rxtx.c b/drivers/net/iavf/iavf_rxtx.c
index a885d6955c..45b30363df 100644
--- a/drivers/net/iavf/iavf_rxtx.c
+++ b/drivers/net/iavf/iavf_rxtx.c
@@ -583,6 +583,7 @@ iavf_dev_rx_queue_setup(struct rte_eth_dev *dev, uint16_t queue_idx,
 
 	len = rte_pktmbuf_data_room_size(rxq->mp) - RTE_PKTMBUF_HEADROOM;
 	rxq->rx_buf_len = RTE_ALIGN_FLOOR(len, (1 << IAVF_RXQ_CTX_DBUFF_SHIFT));
+	rxq->rx_buf_len = RTE_MIN(rxq->rx_buf_len, IAVF_RX_MAX_DATA_BUF_SIZE);
 
 	/* Allocate the software ring. */
 	len = nb_desc + IAVF_RX_MAX_BURST;
diff --git a/drivers/net/iavf/iavf_rxtx.h b/drivers/net/iavf/iavf_rxtx.h
index 047743de4f..f961dbaa77 100644
--- a/drivers/net/iavf/iavf_rxtx.h
+++ b/drivers/net/iavf/iavf_rxtx.h
@@ -16,6 +16,9 @@
 /* used for Rx Bulk Allocate */
 #define IAVF_RX_MAX_BURST         32
 
+/* Max data buffer size must be 16K - 128 bytes */
+#define IAVF_RX_MAX_DATA_BUF_SIZE (16 * 1024 - 128)
+
 /* used for Vector PMD */
 #define IAVF_VPMD_RX_MAX_BURST    32
 #define IAVF_VPMD_TX_MAX_BURST    32
-- 
2.39.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2023-06-15 01:56:37.389939330 +0100
+++ 0053-net-iavf-fix-Rx-data-buffer-size.patch	2023-06-15 01:56:34.703544275 +0100
@@ -1 +1 @@
-From c5549f1d9b1bf2bf2b09517daf89c84fbf5b18e0 Mon Sep 17 00:00:00 2001
+From 0bf4c1164997fe6330553ddf22e1b8451864e1ee Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit c5549f1d9b1bf2bf2b09517daf89c84fbf5b18e0 ]
+
@@ -10 +11,0 @@
-Cc: stable at dpdk.org
@@ -20 +21 @@
-index b1d0fbceb6..0db3aabd92 100644
+index a885d6955c..45b30363df 100644
@@ -23 +24 @@
-@@ -697,6 +697,7 @@ iavf_dev_rx_queue_setup(struct rte_eth_dev *dev, uint16_t queue_idx,
+@@ -583,6 +583,7 @@ iavf_dev_rx_queue_setup(struct rte_eth_dev *dev, uint16_t queue_idx,
@@ -32 +33 @@
-index 09e2127db0..f205a2aaf1 100644
+index 047743de4f..f961dbaa77 100644