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Subject[PATCH net-next v2 2/8] net: stmmac: tc: Add support for ETF Scheduler using TBS
Date
Adds the support for ETF scheduler using TBS feature which is available
in XGMAC and QoS IPs.

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

---
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: Jose Abreu <joabreu@synopsys.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: netdev@vger.kernel.org
Cc: linux-stm32@st-md-mailman.stormreply.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
---
drivers/net/ethernet/stmicro/stmmac/common.h | 1 +
drivers/net/ethernet/stmicro/stmmac/hwif.h | 5 +++++
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 ++
drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c | 18 ++++++++++++++++++
4 files changed, 26 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/common.h b/drivers/net/ethernet/stmicro/stmmac/common.h
index 31003b67d24f..487099092693 100644
--- a/drivers/net/ethernet/stmicro/stmmac/common.h
+++ b/drivers/net/ethernet/stmicro/stmmac/common.h
@@ -368,6 +368,7 @@ struct dma_features {
unsigned int estdep;
unsigned int estsel;
unsigned int fpesel;
+ unsigned int tbssel;
};

/* RX Buffer size must be multiple of 4/8/16 bytes */
diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.h b/drivers/net/ethernet/stmicro/stmmac/hwif.h
index 71c23cbd7af8..df63b0367aff 100644
--- a/drivers/net/ethernet/stmicro/stmmac/hwif.h
+++ b/drivers/net/ethernet/stmicro/stmmac/hwif.h
@@ -533,6 +533,7 @@ struct tc_cls_u32_offload;
struct tc_cbs_qopt_offload;
struct flow_cls_offload;
struct tc_taprio_qopt_offload;
+struct tc_etf_qopt_offload;

struct stmmac_tc_ops {
int (*init)(struct stmmac_priv *priv);
@@ -544,6 +545,8 @@ struct stmmac_tc_ops {
struct flow_cls_offload *cls);
int (*setup_taprio)(struct stmmac_priv *priv,
struct tc_taprio_qopt_offload *qopt);
+ int (*setup_etf)(struct stmmac_priv *priv,
+ struct tc_etf_qopt_offload *qopt);
};

#define stmmac_tc_init(__priv, __args...) \
@@ -556,6 +559,8 @@ struct stmmac_tc_ops {
stmmac_do_callback(__priv, tc, setup_cls, __args)
#define stmmac_tc_setup_taprio(__priv, __args...) \
stmmac_do_callback(__priv, tc, setup_taprio, __args)
+#define stmmac_tc_setup_etf(__priv, __args...) \
+ stmmac_do_callback(__priv, tc, setup_etf, __args)

struct stmmac_counters;

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 82bf81b7ae76..fcc1ffe0b11e 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -4163,6 +4163,8 @@ static int stmmac_setup_tc(struct net_device *ndev, enum tc_setup_type type,
return stmmac_tc_setup_cbs(priv, priv, type_data);
case TC_SETUP_QDISC_TAPRIO:
return stmmac_tc_setup_taprio(priv, priv, type_data);
+ case TC_SETUP_QDISC_ETF:
+ return stmmac_tc_setup_etf(priv, priv, type_data);
default:
return -EOPNOTSUPP;
}
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
index 6c4686b77516..ca953fa60fa2 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
@@ -727,10 +727,28 @@ static int tc_setup_taprio(struct stmmac_priv *priv,
return ret;
}

+static int tc_setup_etf(struct stmmac_priv *priv,
+ struct tc_etf_qopt_offload *qopt)
+{
+
+ if (!priv->dma_cap.tbssel)
+ return -EOPNOTSUPP;
+ if (qopt->queue >= priv->plat->tx_queues_to_use)
+ return -EINVAL;
+ if (!priv->tx_queue[qopt->queue].tbs_avail)
+ return -EINVAL;
+
+ priv->tx_queue[qopt->queue].tbs_en = qopt->enable;
+ netdev_info(priv->dev, "%s ETF for Queue %d\n",
+ qopt->enable ? "enabled" : "disabled", qopt->queue);
+ return 0;
+}
+
const struct stmmac_tc_ops dwmac510_tc_ops = {
.init = tc_init,
.setup_cls_u32 = tc_setup_cls_u32,
.setup_cbs = tc_setup_cbs,
.setup_cls = tc_setup_cls,
.setup_taprio = tc_setup_taprio,
+ .setup_etf = tc_setup_etf,
};
--
2.7.4
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