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From:   Rohan G Thomas <rohan.g.thomas@intel.com>
To:     "David S . Miller" <davem@davemloft.net>,
        Alexandre Torgue <alexandre.torgue@foss.st.com>,
        Jose Abreu <joabreu@synopsys.com>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Maxime Coquelin <mcoquelin.stm32@gmail.com>,
        Giuseppe Cavallaro <peppe.cavallaro@st.com>,
        Richard Cochran <richardcochran@gmail.com>,
        Russell King <linux@armlinux.org.uk>,
        Alexei Starovoitov <ast@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Jesper Dangaard Brouer <hawk@kernel.org>,
        John Fastabend <john.fastabend@gmail.com>,
        Serge Semin <fancer.lancer@gmail.com>
Cc:     netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        bpf@vger.kernel.org, Rohan G Thomas <rohan.g.thomas@intel.com>,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: [PATCH net-next v2 3/3] net: stmmac: Add support for EST cycle-time-extension
Date:   Fri,  1 Dec 2023 13:52:52 +0800
Message-Id: <20231201055252.1302-4-rohan.g.thomas@intel.com>
In-Reply-To: <20231201055252.1302-1-rohan.g.thomas@intel.com>
References: <20231201055252.1302-1-rohan.g.thomas@intel.com>
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Add support for cycle-time-extension. TER GCL-register needs to be
updated with the cycle-time-extension. Width of TER register is EST
time interval width + 7 bits.

Signed-off-by: Rohan G Thomas <rohan.g.thomas@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
index d4ee4684bc70..287767f6d671 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
@@ -975,6 +975,8 @@ static int tc_setup_taprio(struct stmmac_priv *priv,
 		return -EINVAL;
 	if (!qopt->cycle_time)
 		return -ERANGE;
+	if (qopt->cycle_time_extension >= BIT(wid + 7))
+		return -ERANGE;
 
 	if (!plat->est) {
 		plat->est = devm_kzalloc(priv->device, sizeof(*plat->est),
@@ -1041,6 +1043,8 @@ static int tc_setup_taprio(struct stmmac_priv *priv,
 	priv->plat->est->ctr[0] = do_div(ctr, NSEC_PER_SEC);
 	priv->plat->est->ctr[1] = (u32)ctr;
 
+	priv->plat->est->ter = qopt->cycle_time_extension;
+
 	if (fpe && !priv->dma_cap.fpesel) {
 		mutex_unlock(&priv->plat->est->lock);
 		return -EOPNOTSUPP;
-- 
2.26.2