netdev - [PATCH net-next 4/5] net: stmmac: selftests: Add Split Header test

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Date:   Fri,  6 Sep 2019 09:41:16 +0200
From:   Jose Abreu <Jose.Abreu@...opsys.com>
To:     netdev@...r.kernel.org
Cc:     Joao Pinto <Joao.Pinto@...opsys.com>,
        Jose Abreu <Jose.Abreu@...opsys.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        "David S. Miller" <davem@...emloft.net>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH net-next 4/5] net: stmmac: selftests: Add Split Header test

Add a test to validate that Split Header feature is working correctly.
It works by using the rececently introduced counter that increments each
time a packet with split header is received.

Signed-off-by: Jose Abreu <joabreu@...opsys.com>

---
Cc: Giuseppe Cavallaro <peppe.cavallaro@...com>
Cc: Alexandre Torgue <alexandre.torgue@...com>
Cc: Jose Abreu <joabreu@...opsys.com>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Maxime Coquelin <mcoquelin.stm32@...il.com>
Cc: netdev@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
---
 .../net/ethernet/stmicro/stmmac/stmmac_selftests.c | 42 ++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
index 2943943bec43..c56e89e1ae56 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
@@ -1603,6 +1603,44 @@ static int stmmac_test_mjumbo(struct stmmac_priv *priv)
 	return 0;
 }
 
+static int stmmac_test_sph(struct stmmac_priv *priv)
+{
+	unsigned long cnt_end, cnt_start = priv->xstats.rx_split_hdr_pkt_n;
+	struct stmmac_packet_attrs attr = { };
+	int ret;
+
+	if (!priv->sph)
+		return -EOPNOTSUPP;
+
+	/* Check for UDP first */
+	attr.dst = priv->dev->dev_addr;
+	attr.tcp = false;
+
+	ret = __stmmac_test_loopback(priv, &attr);
+	if (ret)
+		return ret;
+
+	cnt_end = priv->xstats.rx_split_hdr_pkt_n;
+	if (cnt_end <= cnt_start)
+		return -EINVAL;
+
+	/* Check for TCP now */
+	cnt_start = cnt_end;
+
+	attr.dst = priv->dev->dev_addr;
+	attr.tcp = true;
+
+	ret = __stmmac_test_loopback(priv, &attr);
+	if (ret)
+		return ret;
+
+	cnt_end = priv->xstats.rx_split_hdr_pkt_n;
+	if (cnt_end <= cnt_start)
+		return -EINVAL;
+
+	return 0;
+}
+
 #define STMMAC_LOOPBACK_NONE	0
 #define STMMAC_LOOPBACK_MAC	1
 #define STMMAC_LOOPBACK_PHY	2
@@ -1724,6 +1762,10 @@ static const struct stmmac_test {
 		.name = "Multichannel Jumbo  ",
 		.lb = STMMAC_LOOPBACK_PHY,
 		.fn = stmmac_test_mjumbo,
+	}, {
+		.name = "Split Header        ",
+		.lb = STMMAC_LOOPBACK_PHY,
+		.fn = stmmac_test_sph,
 	},
 };
 
-- 
2.7.4