netdev - [PATCH net v2 1/2] dpaa_eth: update the buffer layout for non-A050385 erratum scenarios

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Message-Id: <505ebfdd659456e04eba067839eccf14e485005d.1603899392.git.camelia.groza@nxp.com>
Date:   Wed, 28 Oct 2020 18:40:59 +0200
From:   Camelia Groza <camelia.groza@....com>
To:     willemdebruijn.kernel@...il.com, madalin.bucur@....nxp.com,
        davem@...emloft.net, kuba@...nel.org
Cc:     netdev@...r.kernel.org, Camelia Groza <camelia.groza@....com>
Subject: [PATCH net v2 1/2] dpaa_eth: update the buffer layout for non-A050385 erratum scenarios

Impose a large RX private data area only when the A050385 erratum is
present on the hardware. A smaller buffer size is sufficient in all
other scenarios. This enables a wider range of linear frame sizes
in non-erratum scenarios

Fixes: 3c68b8fffb48 ("dpaa_eth: FMan erratum A050385 workaround")
Signed-off-by: Camelia Groza <camelia.groza@....com>
---
 drivers/net/ethernet/freescale/dpaa/dpaa_eth.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
index 06cc863..1aac0b6 100644
--- a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
@@ -175,8 +175,10 @@
 #define DPAA_TIME_STAMP_SIZE 8
 #define DPAA_HASH_RESULTS_SIZE 8
 #ifdef CONFIG_DPAA_ERRATUM_A050385
-#define DPAA_RX_PRIV_DATA_SIZE (DPAA_A050385_ALIGN - (DPAA_PARSE_RESULTS_SIZE\
-	 + DPAA_TIME_STAMP_SIZE + DPAA_HASH_RESULTS_SIZE))
+#define DPAA_RX_PRIV_DATA_SIZE (fman_has_errata_a050385() ? \
+			(DPAA_A050385_ALIGN - (DPAA_PARSE_RESULTS_SIZE\
+			 + DPAA_TIME_STAMP_SIZE + DPAA_HASH_RESULTS_SIZE)) : \
+			(DPAA_TX_PRIV_DATA_SIZE + dpaa_rx_extra_headroom))
 #else
 #define DPAA_RX_PRIV_DATA_SIZE	(u16)(DPAA_TX_PRIV_DATA_SIZE + \
 					dpaa_rx_extra_headroom)
-- 
1.9.1