[PATCH net-next v2 0/7] net: stmmac: Improvements for -next

[PATCH net-next v2 0/7] net: stmmac: Improvements for -next

[Jose Abreu]

Improvements for stmmac.

1) Adds more information regarding HW Caps in the DebugFS file.

2) Prevents incostant bandwidth because of missed interrupts.

3) Allows interrupts to be independently enabled or disabled so that we don't
have to schedule both TX and RX NAPIs.

4) Stops using a magic number in coalesce timer re-arm.

5) and 6) Implements the EST feature for GMAC5+ and XGMAC3+ cores which leads
to 7) that integrates EST feature with TAPRIO API.

---
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 Ripard <mripard@kernel.org>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: netdev@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-stm32@st-md-mailman.stormreply.com
Cc: linux-kernel@vger.kernel.org
---

Jose Abreu (7):
  net: stmmac: Print more information in DebugFS DMA Capabilities file
  net: stmmac: Always arm TX Timer at end of transmission start
  net: stmmac: Let TX and RX interrupts be independently
    enabled/disabled
  net: stmmac: Always use TX coalesce timer value when rescheduling
  net: stmmac: Add basic EST support for GMAC5+
  net: stmmac: Add basic EST support for XGMAC
  net: stmmac: Integrate EST with TAPRIO scheduler API

 drivers/net/ethernet/stmicro/stmmac/common.h       |   4 +
 drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c  |  24 ++++-
 drivers/net/ethernet/stmicro/stmmac/dwmac4.h       |   9 ++
 drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c  |   2 +
 drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c   |   3 +
 drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h   |  11 ++-
 drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c   |  47 +++++++--
 drivers/net/ethernet/stmicro/stmmac/dwmac5.c       |  95 ++++++++++++++++++
 drivers/net/ethernet/stmicro/stmmac/dwmac5.h       |  19 ++++
 drivers/net/ethernet/stmicro/stmmac/dwmac_dma.h    |   6 +-
 drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c    |  22 ++++-
 drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h     |  21 ++++
 .../net/ethernet/stmicro/stmmac/dwxgmac2_core.c    |  52 ++++++++++
 drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c |  27 +++++-
 drivers/net/ethernet/stmicro/stmmac/hwif.h         |  16 ++-
 drivers/net/ethernet/stmicro/stmmac/stmmac.h       |   1 +
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  |  96 ++++++++++++------
 drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c    | 108 +++++++++++++++++++++
 include/linux/stmmac.h                             |  11 +++
 19 files changed, 519 insertions(+), 55 deletions(-)

-- 
2.7.4


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[PATCH net-next v2 1/7] net: stmmac: Print more information in DebugFS DMA Capabilities file

[Jose Abreu]

DMA Capabilites have grown but the DebugFS that shows this info has not
been updated. Lets add the missing information.

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/stmmac_main.c | 31 ++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index da80866d0371..3299f5bb02e2 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -4238,9 +4238,38 @@ static int stmmac_dma_cap_show(struct seq_file *seq, void *v)
 		   priv->dma_cap.number_rx_channel);
 	seq_printf(seq, "\tNumber of Additional TX channel: %d\n",
 		   priv->dma_cap.number_tx_channel);
+	seq_printf(seq, "\tNumber of Additional RX queues: %d\n",
+		   priv->dma_cap.number_rx_queues);
+	seq_printf(seq, "\tNumber of Additional TX queues: %d\n",
+		   priv->dma_cap.number_tx_queues);
 	seq_printf(seq, "\tEnhanced descriptors: %s\n",
 		   (priv->dma_cap.enh_desc) ? "Y" : "N");
-
+	seq_printf(seq, "\tTX Fifo Size: %d\n", priv->dma_cap.tx_fifo_size);
+	seq_printf(seq, "\tRX Fifo Size: %d\n", priv->dma_cap.rx_fifo_size);
+	seq_printf(seq, "\tHash Table Size: %d\n", priv->dma_cap.hash_tb_sz);
+	seq_printf(seq, "\tTSO: %s\n", priv->dma_cap.tsoen ? "Y" : "N");
+	seq_printf(seq, "\tNumber of PPS Outputs: %d\n",
+		   priv->dma_cap.pps_out_num);
+	seq_printf(seq, "\tSafety Features: %s\n",
+		   priv->dma_cap.asp ? "Y" : "N");
+	seq_printf(seq, "\tFlexible RX Parser: %s\n",
+		   priv->dma_cap.frpsel ? "Y" : "N");
+	seq_printf(seq, "\tEnhanced Addressing: %d\n",
+		   priv->dma_cap.addr64);
+	seq_printf(seq, "\tReceive Side Scaling: %s\n",
+		   priv->dma_cap.rssen ? "Y" : "N");
+	seq_printf(seq, "\tVLAN Hash Filtering: %s\n",
+		   priv->dma_cap.vlhash ? "Y" : "N");
+	seq_printf(seq, "\tSplit Header: %s\n",
+		   priv->dma_cap.sphen ? "Y" : "N");
+	seq_printf(seq, "\tVLAN TX Insertion: %s\n",
+		   priv->dma_cap.vlins ? "Y" : "N");
+	seq_printf(seq, "\tDouble VLAN: %s\n",
+		   priv->dma_cap.dvlan ? "Y" : "N");
+	seq_printf(seq, "\tNumber of L3/L4 Filters: %d\n",
+		   priv->dma_cap.l3l4fnum);
+	seq_printf(seq, "\tARP Offloading: %s\n",
+		   priv->dma_cap.arpoffsel ? "Y" : "N");
 	return 0;
 }
 DEFINE_SHOW_ATTRIBUTE(stmmac_dma_cap);
-- 
2.7.4


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[PATCH net-next v2 2/7] net: stmmac: Always arm TX Timer at end of transmission start

[Jose Abreu]

If TX Coalesce timer is enabled we should always arm it, otherwise we
may hit the case where an interrupt is missed and the TX Queue will
timeout.

Arming the timer does not necessarly mean it will run the tx_clean()
because this function is wrapped around NAPI launcher.

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/stmmac_main.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 3299f5bb02e2..311647cdd672 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -3053,8 +3053,6 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev)
 		tx_q->tx_count_frames = 0;
 		stmmac_set_tx_ic(priv, desc);
 		priv->xstats.tx_set_ic_bit++;
-	} else {
-		stmmac_tx_timer_arm(priv, queue);
 	}
 
 	/* We've used all descriptors we need for this skb, however,
@@ -3125,6 +3123,7 @@ static netdev_tx_t stmmac_tso_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	tx_q->tx_tail_addr = tx_q->dma_tx_phy + (tx_q->cur_tx * sizeof(*desc));
 	stmmac_set_tx_tail_ptr(priv, priv->ioaddr, tx_q->tx_tail_addr, queue);
+	stmmac_tx_timer_arm(priv, queue);
 
 	return NETDEV_TX_OK;
 
@@ -3276,8 +3275,6 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
 		tx_q->tx_count_frames = 0;
 		stmmac_set_tx_ic(priv, desc);
 		priv->xstats.tx_set_ic_bit++;
-	} else {
-		stmmac_tx_timer_arm(priv, queue);
 	}
 
 	/* We've used all descriptors we need for this skb, however,
@@ -3366,6 +3363,7 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	tx_q->tx_tail_addr = tx_q->dma_tx_phy + (tx_q->cur_tx * sizeof(*desc));
 	stmmac_set_tx_tail_ptr(priv, priv->ioaddr, tx_q->tx_tail_addr, queue);
+	stmmac_tx_timer_arm(priv, queue);
 
 	return NETDEV_TX_OK;
 
-- 
2.7.4


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Re: [PATCH net-next v2 2/7] net: stmmac: Always arm TX Timer at end of transmission start

[David Miller]

From: Jose Abreu <Jose.Abreu@synopsys.com>
Date: Tue, 17 Dec 2019 13:46:06 +0100

> If TX Coalesce timer is enabled we should always arm it, otherwise we
> may hit the case where an interrupt is missed and the TX Queue will
> timeout.
> 
> Arming the timer does not necessarly mean it will run the tx_clean()
> because this function is wrapped around NAPI launcher.
> 
> Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>

This is a bug fix and thus appropriate for net not net-next.

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[PATCH net-next v2 3/7] net: stmmac: Let TX and RX interrupts be independently enabled/disabled

[Jose Abreu]

By using this mechanism we can get rid of the not so nice method of
scheduling TX NAPI when the RX was scheduled. No bandwidth reduction was
seen with this change.

Changes from v1:
- Remove useless comment (Jakub)
- Do not bind the TX clean to NAPI budget (Jakub)

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 Ripard <mripard@kernel.org>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: netdev@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-stm32@st-md-mailman.stormreply.com
Cc: linux-kernel@vger.kernel.org
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c  | 24 ++++++++--
 drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h   | 11 +++--
 drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c   | 47 ++++++++++++++----
 drivers/net/ethernet/stmicro/stmmac/dwmac_dma.h    |  6 ++-
 drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c    | 22 +++++++--
 drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h     |  2 +
 drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c | 24 ++++++++--
 drivers/net/ethernet/stmicro/stmmac/hwif.h         |  6 ++-
 drivers/net/ethernet/stmicro/stmmac/stmmac.h       |  1 +
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  | 55 +++++++++++++---------
 10 files changed, 149 insertions(+), 49 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
index 1c8d84ed8410..6f834302fda3 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
@@ -335,14 +335,30 @@ static void sun8i_dwmac_dump_mac_regs(struct mac_device_info *hw,
 	}
 }
 
-static void sun8i_dwmac_enable_dma_irq(void __iomem *ioaddr, u32 chan)
+static void sun8i_dwmac_enable_dma_irq(void __iomem *ioaddr, u32 chan,
+				       bool rx, bool tx)
 {
-	writel(EMAC_RX_INT | EMAC_TX_INT, ioaddr + EMAC_INT_EN);
+	u32 value = readl(ioaddr + EMAC_INT_EN);
+
+	if (rx)
+		value |= EMAC_RX_INT;
+	if (tx)
+		value |= EMAC_TX_INT;
+
+	writel(value, ioaddr + EMAC_INT_EN);
 }
 
-static void sun8i_dwmac_disable_dma_irq(void __iomem *ioaddr, u32 chan)
+static void sun8i_dwmac_disable_dma_irq(void __iomem *ioaddr, u32 chan,
+					bool rx, bool tx)
 {
-	writel(0, ioaddr + EMAC_INT_EN);
+	u32 value = readl(ioaddr + EMAC_INT_EN);
+
+	if (rx)
+		value &= ~EMAC_RX_INT;
+	if (tx)
+		value &= ~EMAC_TX_INT;
+
+	writel(value, ioaddr + EMAC_INT_EN);
 }
 
 static void sun8i_dwmac_dma_start_tx(void __iomem *ioaddr, u32 chan)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h
index 589931795847..bcb6d5190f3d 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.h
@@ -168,6 +168,8 @@
 /* DMA default interrupt mask for 4.00 */
 #define DMA_CHAN_INTR_DEFAULT_MASK	(DMA_CHAN_INTR_NORMAL | \
 					 DMA_CHAN_INTR_ABNORMAL)
+#define DMA_CHAN_INTR_DEFAULT_RX	(DMA_CHAN_INTR_ENA_RIE)
+#define DMA_CHAN_INTR_DEFAULT_TX	(DMA_CHAN_INTR_ENA_TIE)
 
 #define DMA_CHAN_INTR_NORMAL_4_10	(DMA_CHAN_INTR_ENA_NIE_4_10 | \
 					 DMA_CHAN_INTR_ENA_RIE | \
@@ -178,6 +180,8 @@
 /* DMA default interrupt mask for 4.10a */
 #define DMA_CHAN_INTR_DEFAULT_MASK_4_10	(DMA_CHAN_INTR_NORMAL_4_10 | \
 					 DMA_CHAN_INTR_ABNORMAL_4_10)
+#define DMA_CHAN_INTR_DEFAULT_RX_4_10	(DMA_CHAN_INTR_ENA_RIE)
+#define DMA_CHAN_INTR_DEFAULT_TX_4_10	(DMA_CHAN_INTR_ENA_TIE)
 
 /* channel 0 specific fields */
 #define DMA_CHAN0_DBG_STAT_TPS		GENMASK(15, 12)
@@ -186,9 +190,10 @@
 #define DMA_CHAN0_DBG_STAT_RPS_SHIFT	8
 
 int dwmac4_dma_reset(void __iomem *ioaddr);
-void dwmac4_enable_dma_irq(void __iomem *ioaddr, u32 chan);
-void dwmac410_enable_dma_irq(void __iomem *ioaddr, u32 chan);
-void dwmac4_disable_dma_irq(void __iomem *ioaddr, u32 chan);
+void dwmac4_enable_dma_irq(void __iomem *ioaddr, u32 chan, bool rx, bool tx);
+void dwmac410_enable_dma_irq(void __iomem *ioaddr, u32 chan, bool rx, bool tx);
+void dwmac4_disable_dma_irq(void __iomem *ioaddr, u32 chan, bool rx, bool tx);
+void dwmac410_disable_dma_irq(void __iomem *ioaddr, u32 chan, bool rx, bool tx);
 void dwmac4_dma_start_tx(void __iomem *ioaddr, u32 chan);
 void dwmac4_dma_stop_tx(void __iomem *ioaddr, u32 chan);
 void dwmac4_dma_start_rx(void __iomem *ioaddr, u32 chan);
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c
index f2a29a90e085..9becca280074 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c
@@ -97,21 +97,52 @@ void dwmac4_set_rx_ring_len(void __iomem *ioaddr, u32 len, u32 chan)
 	writel(len, ioaddr + DMA_CHAN_RX_RING_LEN(chan));
 }
 
-void dwmac4_enable_dma_irq(void __iomem *ioaddr, u32 chan)
+void dwmac4_enable_dma_irq(void __iomem *ioaddr, u32 chan, bool rx, bool tx)
 {
-	writel(DMA_CHAN_INTR_DEFAULT_MASK, ioaddr +
-	       DMA_CHAN_INTR_ENA(chan));
+	u32 value = readl(ioaddr + DMA_CHAN_INTR_ENA(chan));
+
+	if (rx)
+		value |= DMA_CHAN_INTR_DEFAULT_RX;
+	if (tx)
+		value |= DMA_CHAN_INTR_DEFAULT_TX;
+
+	writel(value, ioaddr + DMA_CHAN_INTR_ENA(chan));
 }
 
-void dwmac410_enable_dma_irq(void __iomem *ioaddr, u32 chan)
+void dwmac410_enable_dma_irq(void __iomem *ioaddr, u32 chan, bool rx, bool tx)
 {
-	writel(DMA_CHAN_INTR_DEFAULT_MASK_4_10,
-	       ioaddr + DMA_CHAN_INTR_ENA(chan));
+	u32 value = readl(ioaddr + DMA_CHAN_INTR_ENA(chan));
+
+	if (rx)
+		value |= DMA_CHAN_INTR_DEFAULT_RX_4_10;
+	if (tx)
+		value |= DMA_CHAN_INTR_DEFAULT_TX_4_10;
+
+	writel(value, ioaddr + DMA_CHAN_INTR_ENA(chan));
 }
 
-void dwmac4_disable_dma_irq(void __iomem *ioaddr, u32 chan)
+void dwmac4_disable_dma_irq(void __iomem *ioaddr, u32 chan, bool rx, bool tx)
 {
-	writel(0, ioaddr + DMA_CHAN_INTR_ENA(chan));
+	u32 value = readl(ioaddr + DMA_CHAN_INTR_ENA(chan));
+
+	if (rx)
+		value &= ~DMA_CHAN_INTR_DEFAULT_RX;
+	if (tx)
+		value &= ~DMA_CHAN_INTR_DEFAULT_TX;
+
+	writel(value, ioaddr + DMA_CHAN_INTR_ENA(chan));
+}
+
+void dwmac410_disable_dma_irq(void __iomem *ioaddr, u32 chan, bool rx, bool tx)
+{
+	u32 value = readl(ioaddr + DMA_CHAN_INTR_ENA(chan));
+
+	if (rx)
+		value &= ~DMA_CHAN_INTR_DEFAULT_RX_4_10;
+	if (tx)
+		value &= ~DMA_CHAN_INTR_DEFAULT_TX_4_10;
+
+	writel(value, ioaddr + DMA_CHAN_INTR_ENA(chan));
 }
 
 int dwmac4_dma_interrupt(void __iomem *ioaddr,
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac_dma.h b/drivers/net/ethernet/stmicro/stmmac/dwmac_dma.h
index 292b880f3f9f..e5dbd0bc257e 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac_dma.h
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac_dma.h
@@ -96,6 +96,8 @@
 
 /* DMA default interrupt mask */
 #define DMA_INTR_DEFAULT_MASK	(DMA_INTR_NORMAL | DMA_INTR_ABNORMAL)
+#define DMA_INTR_DEFAULT_RX	(DMA_INTR_ENA_RIE)
+#define DMA_INTR_DEFAULT_TX	(DMA_INTR_ENA_TIE)
 
 /* DMA Status register defines */
 #define DMA_STATUS_GLPII	0x40000000	/* GMAC LPI interrupt */
@@ -130,8 +132,8 @@
 #define NUM_DWMAC1000_DMA_REGS	23
 
 void dwmac_enable_dma_transmission(void __iomem *ioaddr);
-void dwmac_enable_dma_irq(void __iomem *ioaddr, u32 chan);
-void dwmac_disable_dma_irq(void __iomem *ioaddr, u32 chan);
+void dwmac_enable_dma_irq(void __iomem *ioaddr, u32 chan, bool rx, bool tx);
+void dwmac_disable_dma_irq(void __iomem *ioaddr, u32 chan, bool rx, bool tx);
 void dwmac_dma_start_tx(void __iomem *ioaddr, u32 chan);
 void dwmac_dma_stop_tx(void __iomem *ioaddr, u32 chan);
 void dwmac_dma_start_rx(void __iomem *ioaddr, u32 chan);
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c b/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c
index 1bc25aa86dbd..688d36095333 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac_lib.c
@@ -37,14 +37,28 @@ void dwmac_enable_dma_transmission(void __iomem *ioaddr)
 	writel(1, ioaddr + DMA_XMT_POLL_DEMAND);
 }
 
-void dwmac_enable_dma_irq(void __iomem *ioaddr, u32 chan)
+void dwmac_enable_dma_irq(void __iomem *ioaddr, u32 chan, bool rx, bool tx)
 {
-	writel(DMA_INTR_DEFAULT_MASK, ioaddr + DMA_INTR_ENA);
+	u32 value = readl(ioaddr + DMA_INTR_ENA);
+
+	if (rx)
+		value |= DMA_INTR_DEFAULT_RX;
+	if (tx)
+		value |= DMA_INTR_DEFAULT_TX;
+
+	writel(value, ioaddr + DMA_INTR_ENA);
 }
 
-void dwmac_disable_dma_irq(void __iomem *ioaddr, u32 chan)
+void dwmac_disable_dma_irq(void __iomem *ioaddr, u32 chan, bool rx, bool tx)
 {
-	writel(0, ioaddr + DMA_INTR_ENA);
+	u32 value = readl(ioaddr + DMA_INTR_ENA);
+
+	if (rx)
+		value &= ~DMA_INTR_DEFAULT_RX;
+	if (tx)
+		value &= ~DMA_INTR_DEFAULT_TX;
+
+	writel(value, ioaddr + DMA_INTR_ENA);
 }
 
 void dwmac_dma_start_tx(void __iomem *ioaddr, u32 chan)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
index 3b6e559aa0b9..158cf4ad1596 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
+++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
@@ -361,6 +361,8 @@
 #define XGMAC_TIE			BIT(0)
 #define XGMAC_DMA_INT_DEFAULT_EN	(XGMAC_NIE | XGMAC_AIE | XGMAC_RBUE | \
 					XGMAC_RIE | XGMAC_TIE)
+#define XGMAC_DMA_INT_DEFAULT_RX	(XGMAC_RBUE | XGMAC_RIE)
+#define XGMAC_DMA_INT_DEFAULT_TX	(XGMAC_TIE)
 #define XGMAC_DMA_CH_Rx_WATCHDOG(x)	(0x0000313c + (0x80 * (x)))
 #define XGMAC_RWT			GENMASK(7, 0)
 #define XGMAC_DMA_CH_STATUS(x)		(0x00003160 + (0x80 * (x)))
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
index 22a7f0cc1b90..ae066f4e99a8 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
@@ -248,14 +248,30 @@ static void dwxgmac2_dma_tx_mode(void __iomem *ioaddr, int mode,
 	writel(value, ioaddr +  XGMAC_MTL_TXQ_OPMODE(channel));
 }
 
-static void dwxgmac2_enable_dma_irq(void __iomem *ioaddr, u32 chan)
+static void dwxgmac2_enable_dma_irq(void __iomem *ioaddr, u32 chan,
+				    bool rx, bool tx)
 {
-	writel(XGMAC_DMA_INT_DEFAULT_EN, ioaddr + XGMAC_DMA_CH_INT_EN(chan));
+	u32 value = readl(ioaddr + XGMAC_DMA_CH_INT_EN(chan));
+
+	if (rx)
+		value |= XGMAC_DMA_INT_DEFAULT_RX;
+	if (tx)
+		value |= XGMAC_DMA_INT_DEFAULT_TX;
+
+	writel(value, ioaddr + XGMAC_DMA_CH_INT_EN(chan));
 }
 
-static void dwxgmac2_disable_dma_irq(void __iomem *ioaddr, u32 chan)
+static void dwxgmac2_disable_dma_irq(void __iomem *ioaddr, u32 chan,
+				     bool rx, bool tx)
 {
-	writel(0, ioaddr + XGMAC_DMA_CH_INT_EN(chan));
+	u32 value = readl(ioaddr + XGMAC_DMA_CH_INT_EN(chan));
+
+	if (rx)
+		value &= ~XGMAC_DMA_INT_DEFAULT_RX;
+	if (tx)
+		value &= ~XGMAC_DMA_INT_DEFAULT_TX;
+
+	writel(value, ioaddr + XGMAC_DMA_CH_INT_EN(chan));
 }
 
 static void dwxgmac2_dma_start_tx(void __iomem *ioaddr, u32 chan)
diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.h b/drivers/net/ethernet/stmicro/stmmac/hwif.h
index aa5b917398fe..098fbe7a5862 100644
--- a/drivers/net/ethernet/stmicro/stmmac/hwif.h
+++ b/drivers/net/ethernet/stmicro/stmmac/hwif.h
@@ -187,8 +187,10 @@ struct stmmac_dma_ops {
 	void (*dma_diagnostic_fr) (void *data, struct stmmac_extra_stats *x,
 				   void __iomem *ioaddr);
 	void (*enable_dma_transmission) (void __iomem *ioaddr);
-	void (*enable_dma_irq)(void __iomem *ioaddr, u32 chan);
-	void (*disable_dma_irq)(void __iomem *ioaddr, u32 chan);
+	void (*enable_dma_irq)(void __iomem *ioaddr, u32 chan,
+			       bool rx, bool tx);
+	void (*disable_dma_irq)(void __iomem *ioaddr, u32 chan,
+				bool rx, bool tx);
 	void (*start_tx)(void __iomem *ioaddr, u32 chan);
 	void (*stop_tx)(void __iomem *ioaddr, u32 chan);
 	void (*start_rx)(void __iomem *ioaddr, u32 chan);
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
index d993fc7e82c3..f98c5eefb382 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
@@ -88,6 +88,7 @@ struct stmmac_channel {
 	struct napi_struct rx_napi ____cacheline_aligned_in_smp;
 	struct napi_struct tx_napi ____cacheline_aligned_in_smp;
 	struct stmmac_priv *priv_data;
+	spinlock_t lock;
 	u32 index;
 };
 
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 311647cdd672..80575243820b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -2069,17 +2069,25 @@ static int stmmac_napi_check(struct stmmac_priv *priv, u32 chan)
 	int status = stmmac_dma_interrupt_status(priv, priv->ioaddr,
 						 &priv->xstats, chan);
 	struct stmmac_channel *ch = &priv->channel[chan];
+	unsigned long flags;
 
 	if ((status & handle_rx) && (chan < priv->plat->rx_queues_to_use)) {
 		if (napi_schedule_prep(&ch->rx_napi)) {
-			stmmac_disable_dma_irq(priv, priv->ioaddr, chan);
+			spin_lock_irqsave(&ch->lock, flags);
+			stmmac_disable_dma_irq(priv, priv->ioaddr, chan, 1, 0);
+			spin_unlock_irqrestore(&ch->lock, flags);
 			__napi_schedule_irqoff(&ch->rx_napi);
-			status |= handle_tx;
 		}
 	}
 
-	if ((status & handle_tx) && (chan < priv->plat->tx_queues_to_use))
-		napi_schedule_irqoff(&ch->tx_napi);
+	if ((status & handle_tx) && (chan < priv->plat->tx_queues_to_use)) {
+		if (napi_schedule_prep(&ch->tx_napi)) {
+			spin_lock_irqsave(&ch->lock, flags);
+			stmmac_disable_dma_irq(priv, priv->ioaddr, chan, 0, 1);
+			spin_unlock_irqrestore(&ch->lock, flags);
+			__napi_schedule_irqoff(&ch->tx_napi);
+		}
+	}
 
 	return status;
 }
@@ -2274,14 +2282,14 @@ static void stmmac_tx_timer(struct timer_list *t)
 
 	ch = &priv->channel[tx_q->queue_index];
 
-	/*
-	 * If NAPI is already running we can miss some events. Let's rearm
-	 * the timer and try again.
-	 */
-	if (likely(napi_schedule_prep(&ch->tx_napi)))
+	if (likely(napi_schedule_prep(&ch->tx_napi))) {
+		unsigned long flags;
+
+		spin_lock_irqsave(&ch->lock, flags);
+		stmmac_disable_dma_irq(priv, priv->ioaddr, ch->index, 0, 1);
+		spin_unlock_irqrestore(&ch->lock, flags);
 		__napi_schedule(&ch->tx_napi);
-	else
-		mod_timer(&tx_q->txtimer, STMMAC_COAL_TIMER(10));
+	}
 }
 
 /**
@@ -3749,8 +3757,14 @@ static int stmmac_napi_poll_rx(struct napi_struct *napi, int budget)
 	priv->xstats.napi_poll++;
 
 	work_done = stmmac_rx(priv, budget, chan);
-	if (work_done < budget && napi_complete_done(napi, work_done))
-		stmmac_enable_dma_irq(priv, priv->ioaddr, chan);
+	if (work_done < budget && napi_complete_done(napi, work_done)) {
+		unsigned long flags;
+
+		spin_lock_irqsave(&ch->lock, flags);
+		stmmac_enable_dma_irq(priv, priv->ioaddr, chan, 1, 0);
+		spin_unlock_irqrestore(&ch->lock, flags);
+	}
+
 	return work_done;
 }
 
@@ -3759,7 +3773,6 @@ static int stmmac_napi_poll_tx(struct napi_struct *napi, int budget)
 	struct stmmac_channel *ch =
 		container_of(napi, struct stmmac_channel, tx_napi);
 	struct stmmac_priv *priv = ch->priv_data;
-	struct stmmac_tx_queue *tx_q;
 	u32 chan = ch->index;
 	int work_done;
 
@@ -3768,15 +3781,12 @@ static int stmmac_napi_poll_tx(struct napi_struct *napi, int budget)
 	work_done = stmmac_tx_clean(priv, DMA_TX_SIZE, chan);
 	work_done = min(work_done, budget);
 
-	if (work_done < budget)
-		napi_complete_done(napi, work_done);
+	if (work_done < budget && napi_complete_done(napi, work_done)) {
+		unsigned long flags;
 
-	/* Force transmission restart */
-	tx_q = &priv->tx_queue[chan];
-	if (tx_q->cur_tx != tx_q->dirty_tx) {
-		stmmac_enable_dma_transmission(priv, priv->ioaddr);
-		stmmac_set_tx_tail_ptr(priv, priv->ioaddr, tx_q->tx_tail_addr,
-				       chan);
+		spin_lock_irqsave(&ch->lock, flags);
+		stmmac_enable_dma_irq(priv, priv->ioaddr, chan, 0, 1);
+		spin_unlock_irqrestore(&ch->lock, flags);
 	}
 
 	return work_done;
@@ -4712,6 +4722,7 @@ int stmmac_dvr_probe(struct device *device,
 	for (queue = 0; queue < maxq; queue++) {
 		struct stmmac_channel *ch = &priv->channel[queue];
 
+		spin_lock_init(&ch->lock);
 		ch->priv_data = priv;
 		ch->index = queue;
 
-- 
2.7.4


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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH net-next v2 4/7] net: stmmac: Always use TX coalesce timer value when rescheduling

[Jose Abreu]

When we have pending packets we re-arm the TX timer with a magic value.

This changes the re-arm of the timer from 10us to the user-defined
coalesce value. As we support different speeds, having a magic value of
10us can be either too short or to large depending on the speed so we
let user configure it. The default value of the timer is 1ms but it can
be reconfigured by ethtool.

Changes from v1:
- Reword commit message (Jakub)

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/stmmac_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 80575243820b..b3c6c5e29404 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -1975,7 +1975,7 @@ static int stmmac_tx_clean(struct stmmac_priv *priv, int budget, u32 queue)
 
 	/* We still have pending packets, let's call for a new scheduling */
 	if (tx_q->dirty_tx != tx_q->cur_tx)
-		mod_timer(&tx_q->txtimer, STMMAC_COAL_TIMER(10));
+		mod_timer(&tx_q->txtimer, STMMAC_COAL_TIMER(priv->tx_coal_timer));
 
 	__netif_tx_unlock_bh(netdev_get_tx_queue(priv->dev, queue));
 
-- 
2.7.4


_______________________________________________
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[PATCH net-next v2 5/7] net: stmmac: Add basic EST support for GMAC5+

[Jose Abreu]

From: Jose Abreu <joabreu@synopsys.com>

Adds the support for EST in GMAC5+ cores. This feature allows to offload
scheduling of queues opening time to the IP.

Signed-off-by: Jose Abreu <joabreu@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      |  4 +
 drivers/net/ethernet/stmicro/stmmac/dwmac4.h      |  9 +++
 drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c |  2 +
 drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c  |  3 +
 drivers/net/ethernet/stmicro/stmmac/dwmac5.c      | 95 +++++++++++++++++++++++
 drivers/net/ethernet/stmicro/stmmac/dwmac5.h      | 19 +++++
 drivers/net/ethernet/stmicro/stmmac/hwif.h        |  5 ++
 include/linux/stmmac.h                            | 11 +++
 8 files changed, 148 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/common.h b/drivers/net/ethernet/stmicro/stmmac/common.h
index b210e987a1db..2f1fc93a9b1e 100644
--- a/drivers/net/ethernet/stmicro/stmmac/common.h
+++ b/drivers/net/ethernet/stmicro/stmmac/common.h
@@ -363,6 +363,10 @@ struct dma_features {
 	unsigned int dvlan;
 	unsigned int l3l4fnum;
 	unsigned int arpoffsel;
+	/* TSN Features */
+	unsigned int estwid;
+	unsigned int estdep;
+	unsigned int estsel;
 };
 
 /* GMAC TX FIFO is 8K, Rx FIFO is 16K */
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4.h b/drivers/net/ethernet/stmicro/stmmac/dwmac4.h
index 2dc70d104161..f7f5a2751147 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4.h
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4.h
@@ -176,6 +176,8 @@ enum power_event {
 #define GMAC_CONFIG_SARC		GENMASK(30, 28)
 #define GMAC_CONFIG_SARC_SHIFT		28
 #define GMAC_CONFIG_IPC			BIT(27)
+#define GMAC_CONFIG_IPG			GENMASK(26, 24)
+#define GMAC_CONFIG_IPG_SHIFT		24
 #define GMAC_CONFIG_2K			BIT(22)
 #define GMAC_CONFIG_ACS			BIT(20)
 #define GMAC_CONFIG_BE			BIT(18)
@@ -183,6 +185,7 @@ enum power_event {
 #define GMAC_CONFIG_JE			BIT(16)
 #define GMAC_CONFIG_PS			BIT(15)
 #define GMAC_CONFIG_FES			BIT(14)
+#define GMAC_CONFIG_FES_SHIFT		14
 #define GMAC_CONFIG_DM			BIT(13)
 #define GMAC_CONFIG_LM			BIT(12)
 #define GMAC_CONFIG_DCRS		BIT(9)
@@ -190,6 +193,9 @@ enum power_event {
 #define GMAC_CONFIG_RE			BIT(0)
 
 /* MAC extended config */
+#define GMAC_CONFIG_EIPG		GENMASK(29, 25)
+#define GMAC_CONFIG_EIPG_SHIFT		25
+#define GMAC_CONFIG_EIPG_EN		BIT(24)
 #define GMAC_CONFIG_HDSMS		GENMASK(22, 20)
 #define GMAC_CONFIG_HDSMS_SHIFT		20
 #define GMAC_CONFIG_HDSMS_256		(0x2 << GMAC_CONFIG_HDSMS_SHIFT)
@@ -231,6 +237,9 @@ enum power_event {
 
 /* MAC HW features3 bitmap */
 #define GMAC_HW_FEAT_ASP		GENMASK(29, 28)
+#define GMAC_HW_FEAT_ESTWID		GENMASK(21, 20)
+#define GMAC_HW_FEAT_ESTDEP		GENMASK(19, 17)
+#define GMAC_HW_FEAT_ESTSEL		BIT(16)
 #define GMAC_HW_FEAT_FRPES		GENMASK(14, 13)
 #define GMAC_HW_FEAT_FRPBS		GENMASK(12, 11)
 #define GMAC_HW_FEAT_FRPSEL		BIT(10)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
index 40ca00e596dd..8df7496411a0 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
@@ -984,6 +984,7 @@ const struct stmmac_ops dwmac410_ops = {
 	.set_arp_offload = dwmac4_set_arp_offload,
 	.config_l3_filter = dwmac4_config_l3_filter,
 	.config_l4_filter = dwmac4_config_l4_filter,
+	.est_configure = dwmac5_est_configure,
 };
 
 const struct stmmac_ops dwmac510_ops = {
@@ -1027,6 +1028,7 @@ const struct stmmac_ops dwmac510_ops = {
 	.set_arp_offload = dwmac4_set_arp_offload,
 	.config_l3_filter = dwmac4_config_l3_filter,
 	.config_l4_filter = dwmac4_config_l4_filter,
+	.est_configure = dwmac5_est_configure,
 };
 
 int dwmac4_setup(struct stmmac_priv *priv)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
index c15409030710..3552ce1201ff 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
@@ -404,6 +404,9 @@ static void dwmac4_get_hw_feature(void __iomem *ioaddr,
 
 	/* 5.10 Features */
 	dma_cap->asp = (hw_cap & GMAC_HW_FEAT_ASP) >> 28;
+	dma_cap->estwid = (hw_cap & GMAC_HW_FEAT_ESTWID) >> 20;
+	dma_cap->estdep = (hw_cap & GMAC_HW_FEAT_ESTDEP) >> 17;
+	dma_cap->estsel = (hw_cap & GMAC_HW_FEAT_ESTSEL) >> 16;
 	dma_cap->frpes = (hw_cap & GMAC_HW_FEAT_FRPES) >> 13;
 	dma_cap->frpbs = (hw_cap & GMAC_HW_FEAT_FRPBS) >> 11;
 	dma_cap->frpsel = (hw_cap & GMAC_HW_FEAT_FRPSEL) >> 10;
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac5.c b/drivers/net/ethernet/stmicro/stmmac/dwmac5.c
index e436fa160c7d..8047f402fb3f 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac5.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac5.c
@@ -550,3 +550,98 @@ int dwmac5_flex_pps_config(void __iomem *ioaddr, int index,
 	writel(val, ioaddr + MAC_PPS_CONTROL);
 	return 0;
 }
+
+static int dwmac5_est_write(void __iomem *ioaddr, u32 reg, u32 val, bool gcl)
+{
+	u32 ctrl;
+
+	writel(val, ioaddr + MTL_EST_GCL_DATA);
+
+	ctrl = (reg << ADDR_SHIFT);
+	ctrl |= gcl ? 0 : GCRR;
+
+	writel(ctrl, ioaddr + MTL_EST_GCL_CONTROL);
+
+	ctrl |= SRWO;
+	writel(ctrl, ioaddr + MTL_EST_GCL_CONTROL);
+
+	return readl_poll_timeout(ioaddr + MTL_EST_GCL_CONTROL,
+				  ctrl, !(ctrl & SRWO), 100, 5000);
+}
+
+int dwmac5_est_configure(void __iomem *ioaddr, struct stmmac_est *cfg,
+			 unsigned int ptp_rate)
+{
+	u32 speed, total_offset, offset, ctrl, ctr_low;
+	u32 extcfg = readl(ioaddr + GMAC_EXT_CONFIG);
+	u32 mac_cfg = readl(ioaddr + GMAC_CONFIG);
+	int i, ret = 0x0;
+	u64 total_ctr;
+
+	if (extcfg & GMAC_CONFIG_EIPG_EN) {
+		offset = (extcfg & GMAC_CONFIG_EIPG) >> GMAC_CONFIG_EIPG_SHIFT;
+		offset = 104 + (offset * 8);
+	} else {
+		offset = (mac_cfg & GMAC_CONFIG_IPG) >> GMAC_CONFIG_IPG_SHIFT;
+		offset = 96 - (offset * 8);
+	}
+
+	speed = mac_cfg & (GMAC_CONFIG_PS | GMAC_CONFIG_FES);
+	speed = speed >> GMAC_CONFIG_FES_SHIFT;
+
+	switch (speed) {
+	case 0x0:
+		offset = offset * 1000; /* 1G */
+		break;
+	case 0x1:
+		offset = offset * 400; /* 2.5G */
+		break;
+	case 0x2:
+		offset = offset * 100000; /* 10M */
+		break;
+	case 0x3:
+		offset = offset * 10000; /* 100M */
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	offset = offset / 1000;
+
+	ret |= dwmac5_est_write(ioaddr, BTR_LOW, cfg->btr[0], false);
+	ret |= dwmac5_est_write(ioaddr, BTR_HIGH, cfg->btr[1], false);
+	ret |= dwmac5_est_write(ioaddr, TER, cfg->ter, false);
+	ret |= dwmac5_est_write(ioaddr, LLR, cfg->gcl_size, false);
+	if (ret)
+		return ret;
+
+	total_offset = 0;
+	for (i = 0; i < cfg->gcl_size; i++) {
+		ret = dwmac5_est_write(ioaddr, i, cfg->gcl[i] + offset, true);
+		if (ret)
+			return ret;
+
+		total_offset += offset;
+	}
+
+	total_ctr = cfg->ctr[0] + cfg->ctr[1] * 1000000000;
+	total_ctr += total_offset;
+
+	ctr_low = do_div(total_ctr, 1000000000);
+
+	ret |= dwmac5_est_write(ioaddr, CTR_LOW, ctr_low, false);
+	ret |= dwmac5_est_write(ioaddr, CTR_HIGH, total_ctr, false);
+	if (ret)
+		return ret;
+
+	ctrl = readl(ioaddr + MTL_EST_CONTROL);
+	ctrl &= ~PTOV;
+	ctrl |= ((1000000000 / ptp_rate) * 6) << PTOV_SHIFT;
+	if (cfg->enable)
+		ctrl |= EEST | SSWL;
+	else
+		ctrl &= ~EEST;
+
+	writel(ctrl, ioaddr + MTL_EST_CONTROL);
+	return 0;
+}
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac5.h b/drivers/net/ethernet/stmicro/stmmac/dwmac5.h
index 23fecf68f781..70e6d8837dd9 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac5.h
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac5.h
@@ -30,6 +30,23 @@
 #define MAC_PPSx_INTERVAL(x)		(0x00000b88 + ((x) * 0x10))
 #define MAC_PPSx_WIDTH(x)		(0x00000b8c + ((x) * 0x10))
 
+#define MTL_EST_CONTROL			0x00000c50
+#define PTOV				GENMASK(31, 24)
+#define PTOV_SHIFT			24
+#define SSWL				BIT(1)
+#define EEST				BIT(0)
+#define MTL_EST_GCL_CONTROL		0x00000c80
+#define BTR_LOW				0x0
+#define BTR_HIGH			0x1
+#define CTR_LOW				0x2
+#define CTR_HIGH			0x3
+#define TER				0x4
+#define LLR				0x5
+#define ADDR_SHIFT			8
+#define GCRR				BIT(2)
+#define SRWO				BIT(0)
+#define MTL_EST_GCL_DATA		0x00000c84
+
 #define MTL_RXP_CONTROL_STATUS		0x00000ca0
 #define RXPI				BIT(31)
 #define NPE				GENMASK(23, 16)
@@ -83,5 +100,7 @@ int dwmac5_rxp_config(void __iomem *ioaddr, struct stmmac_tc_entry *entries,
 int dwmac5_flex_pps_config(void __iomem *ioaddr, int index,
 			   struct stmmac_pps_cfg *cfg, bool enable,
 			   u32 sub_second_inc, u32 systime_flags);
+int dwmac5_est_configure(void __iomem *ioaddr, struct stmmac_est *cfg,
+			 unsigned int ptp_rate);
 
 #endif /* __DWMAC5_H__ */
diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.h b/drivers/net/ethernet/stmicro/stmmac/hwif.h
index 098fbe7a5862..9fd34df6eb16 100644
--- a/drivers/net/ethernet/stmicro/stmmac/hwif.h
+++ b/drivers/net/ethernet/stmicro/stmmac/hwif.h
@@ -276,6 +276,7 @@ struct stmmac_safety_stats;
 struct stmmac_tc_entry;
 struct stmmac_pps_cfg;
 struct stmmac_rss;
+struct stmmac_est;
 
 /* Helpers to program the MAC core */
 struct stmmac_ops {
@@ -373,6 +374,8 @@ struct stmmac_ops {
 				bool en, bool udp, bool sa, bool inv,
 				u32 match);
 	void (*set_arp_offload)(struct mac_device_info *hw, bool en, u32 addr);
+	int (*est_configure)(void __iomem *ioaddr, struct stmmac_est *cfg,
+			     unsigned int ptp_rate);
 };
 
 #define stmmac_core_init(__priv, __args...) \
@@ -459,6 +462,8 @@ struct stmmac_ops {
 	stmmac_do_callback(__priv, mac, config_l4_filter, __args)
 #define stmmac_set_arp_offload(__priv, __args...) \
 	stmmac_do_void_callback(__priv, mac, set_arp_offload, __args)
+#define stmmac_est_configure(__priv, __args...) \
+	stmmac_do_callback(__priv, mac, est_configure, __args)
 
 /* PTP and HW Timer helpers */
 struct stmmac_hwtimestamp {
diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
index d4bcd9387136..55587cc10567 100644
--- a/include/linux/stmmac.h
+++ b/include/linux/stmmac.h
@@ -109,6 +109,16 @@ struct stmmac_axi {
 	bool axi_rb;
 };
 
+#define EST_GCL		1024
+struct stmmac_est {
+	int enable;
+	u32 btr[2];
+	u32 ctr[2];
+	u32 ter;
+	u32 gcl[EST_GCL];
+	u32 gcl_size;
+};
+
 struct stmmac_rxq_cfg {
 	u8 mode_to_use;
 	u32 chan;
@@ -139,6 +149,7 @@ struct plat_stmmacenet_data {
 	struct device_node *phylink_node;
 	struct device_node *mdio_node;
 	struct stmmac_dma_cfg *dma_cfg;
+	struct stmmac_est *est;
 	int clk_csr;
 	int has_gmac;
 	int enh_desc;
-- 
2.7.4


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[PATCH net-next v2 6/7] net: stmmac: Add basic EST support for XGMAC

[Jose Abreu]

Adds the support for EST in XGMAC cores. This feature allows to offload
scheduling of queues opening time to the IP.

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/dwxgmac2.h     | 19 ++++++++
 .../net/ethernet/stmicro/stmmac/dwxgmac2_core.c    | 52 ++++++++++++++++++++++
 drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c |  3 ++
 3 files changed, 74 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
index 158cf4ad1596..e1e79c90c865 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
+++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
@@ -136,6 +136,9 @@
 #define XGMAC_HWFEAT_TXQCNT		GENMASK(9, 6)
 #define XGMAC_HWFEAT_RXQCNT		GENMASK(3, 0)
 #define XGMAC_HW_FEATURE3		0x00000128
+#define XGMAC_HWFEAT_ESTWID		GENMASK(24, 23)
+#define XGMAC_HWFEAT_ESTDEP		GENMASK(22, 20)
+#define XGMAC_HWFEAT_ESTSEL		BIT(19)
 #define XGMAC_HWFEAT_ASP		GENMASK(15, 14)
 #define XGMAC_HWFEAT_DVLAN		BIT(13)
 #define XGMAC_HWFEAT_FRPES		GENMASK(12, 11)
@@ -237,6 +240,22 @@
 #define XGMAC_TC_PRTY_MAP1		0x00001044
 #define XGMAC_PSTC(x)			GENMASK((x) * 8 + 7, (x) * 8)
 #define XGMAC_PSTC_SHIFT(x)		((x) * 8)
+#define XGMAC_MTL_EST_CONTROL		0x00001050
+#define XGMAC_PTOV			GENMASK(31, 23)
+#define XGMAC_PTOV_SHIFT		23
+#define XGMAC_SSWL			BIT(1)
+#define XGMAC_EEST			BIT(0)
+#define XGMAC_MTL_EST_GCL_CONTROL	0x00001080
+#define XGMAC_BTR_LOW			0x0
+#define XGMAC_BTR_HIGH			0x1
+#define XGMAC_CTR_LOW			0x2
+#define XGMAC_CTR_HIGH			0x3
+#define XGMAC_TER			0x4
+#define XGMAC_LLR			0x5
+#define XGMAC_ADDR_SHIFT		8
+#define XGMAC_GCRR			BIT(2)
+#define XGMAC_SRWO			BIT(0)
+#define XGMAC_MTL_EST_GCL_DATA		0x00001084
 #define XGMAC_MTL_RXP_CONTROL_STATUS	0x000010a0
 #define XGMAC_RXPI			BIT(31)
 #define XGMAC_NPE			GENMASK(23, 16)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c
index 082f5ee9e525..2f6e960947d9 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c
@@ -1359,6 +1359,57 @@ static void dwxgmac2_set_arp_offload(struct mac_device_info *hw, bool en,
 	writel(value, ioaddr + XGMAC_RX_CONFIG);
 }
 
+static int dwxgmac3_est_write(void __iomem *ioaddr, u32 reg, u32 val, bool gcl)
+{
+	u32 ctrl;
+
+	writel(val, ioaddr + XGMAC_MTL_EST_GCL_DATA);
+
+	ctrl = (reg << XGMAC_ADDR_SHIFT);
+	ctrl |= gcl ? 0 : XGMAC_GCRR;
+
+	writel(ctrl, ioaddr + XGMAC_MTL_EST_GCL_CONTROL);
+
+	ctrl |= XGMAC_SRWO;
+	writel(ctrl, ioaddr + XGMAC_MTL_EST_GCL_CONTROL);
+
+	return readl_poll_timeout_atomic(ioaddr + XGMAC_MTL_EST_GCL_CONTROL,
+					 ctrl, !(ctrl & XGMAC_SRWO), 100, 5000);
+}
+
+static int dwxgmac3_est_configure(void __iomem *ioaddr, struct stmmac_est *cfg,
+				  unsigned int ptp_rate)
+{
+	int i, ret = 0x0;
+	u32 ctrl;
+
+	ret |= dwxgmac3_est_write(ioaddr, XGMAC_BTR_LOW, cfg->btr[0], false);
+	ret |= dwxgmac3_est_write(ioaddr, XGMAC_BTR_HIGH, cfg->btr[1], false);
+	ret |= dwxgmac3_est_write(ioaddr, XGMAC_TER, cfg->ter, false);
+	ret |= dwxgmac3_est_write(ioaddr, XGMAC_LLR, cfg->gcl_size, false);
+	ret |= dwxgmac3_est_write(ioaddr, XGMAC_CTR_LOW, cfg->ctr[0], false);
+	ret |= dwxgmac3_est_write(ioaddr, XGMAC_CTR_HIGH, cfg->ctr[1], false);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < cfg->gcl_size; i++) {
+		ret = dwxgmac3_est_write(ioaddr, i, cfg->gcl[i], true);
+		if (ret)
+			return ret;
+	}
+
+	ctrl = readl(ioaddr + XGMAC_MTL_EST_CONTROL);
+	ctrl &= ~XGMAC_PTOV;
+	ctrl |= ((1000000000 / ptp_rate) * 9) << XGMAC_PTOV_SHIFT;
+	if (cfg->enable)
+		ctrl |= XGMAC_EEST | XGMAC_SSWL;
+	else
+		ctrl &= ~XGMAC_EEST;
+
+	writel(ctrl, ioaddr + XGMAC_MTL_EST_CONTROL);
+	return 0;
+}
+
 const struct stmmac_ops dwxgmac210_ops = {
 	.core_init = dwxgmac2_core_init,
 	.set_mac = dwxgmac2_set_mac,
@@ -1402,6 +1453,7 @@ const struct stmmac_ops dwxgmac210_ops = {
 	.config_l3_filter = dwxgmac2_config_l3_filter,
 	.config_l4_filter = dwxgmac2_config_l4_filter,
 	.set_arp_offload = dwxgmac2_set_arp_offload,
+	.est_configure = dwxgmac3_est_configure,
 };
 
 int dwxgmac2_setup(struct stmmac_priv *priv)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
index ae066f4e99a8..6ff2795a5117 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
@@ -429,6 +429,9 @@ static void dwxgmac2_get_hw_feature(void __iomem *ioaddr,
 
 	/* MAC HW feature 3 */
 	hw_cap = readl(ioaddr + XGMAC_HW_FEATURE3);
+	dma_cap->estwid = (hw_cap & XGMAC_HWFEAT_ESTWID) >> 23;
+	dma_cap->estdep = (hw_cap & XGMAC_HWFEAT_ESTDEP) >> 20;
+	dma_cap->estsel = (hw_cap & XGMAC_HWFEAT_ESTSEL) >> 19;
 	dma_cap->asp = (hw_cap & XGMAC_HWFEAT_ASP) >> 14;
 	dma_cap->dvlan = (hw_cap & XGMAC_HWFEAT_DVLAN) >> 13;
 	dma_cap->frpes = (hw_cap & XGMAC_HWFEAT_FRPES) >> 11;
-- 
2.7.4


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[PATCH net-next v2 7/7] net: stmmac: Integrate EST with TAPRIO scheduler API

[Jose Abreu]

Now that we have the EST code for XGMAC and QoS we can use it with the
TAPRIO scheduler. Integrate it into the main driver and use the API to
configure the EST feature.

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/hwif.h        |   5 +
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c |   2 +
 drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c   | 108 ++++++++++++++++++++++
 3 files changed, 115 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.h b/drivers/net/ethernet/stmicro/stmmac/hwif.h
index 9fd34df6eb16..22f79c0a9343 100644
--- a/drivers/net/ethernet/stmicro/stmmac/hwif.h
+++ b/drivers/net/ethernet/stmicro/stmmac/hwif.h
@@ -521,6 +521,7 @@ struct stmmac_priv;
 struct tc_cls_u32_offload;
 struct tc_cbs_qopt_offload;
 struct flow_cls_offload;
+struct tc_taprio_qopt_offload;
 
 struct stmmac_tc_ops {
 	int (*init)(struct stmmac_priv *priv);
@@ -530,6 +531,8 @@ struct stmmac_tc_ops {
 			 struct tc_cbs_qopt_offload *qopt);
 	int (*setup_cls)(struct stmmac_priv *priv,
 			 struct flow_cls_offload *cls);
+	int (*setup_taprio)(struct stmmac_priv *priv,
+			    struct tc_taprio_qopt_offload *qopt);
 };
 
 #define stmmac_tc_init(__priv, __args...) \
@@ -540,6 +543,8 @@ struct stmmac_tc_ops {
 	stmmac_do_callback(__priv, tc, setup_cbs, __args)
 #define stmmac_tc_setup_cls(__priv, __args...) \
 	stmmac_do_callback(__priv, tc, setup_cls, __args)
+#define stmmac_tc_setup_taprio(__priv, __args...) \
+	stmmac_do_callback(__priv, tc, setup_taprio, __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 b3c6c5e29404..03bd32420b3b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -4074,6 +4074,8 @@ static int stmmac_setup_tc(struct net_device *ndev, enum tc_setup_type type,
 						  priv, priv, true);
 	case TC_SETUP_QDISC_CBS:
 		return stmmac_tc_setup_cbs(priv, priv, type_data);
+	case TC_SETUP_QDISC_TAPRIO:
+		return stmmac_tc_setup_taprio(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 7d972e0fd2b0..58d4ce094381 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
@@ -591,9 +591,117 @@ static int tc_setup_cls(struct stmmac_priv *priv,
 	return ret;
 }
 
+static int tc_setup_taprio(struct stmmac_priv *priv,
+			   struct tc_taprio_qopt_offload *qopt)
+{
+	u32 size, wid = priv->dma_cap.estwid, dep = priv->dma_cap.estdep;
+	struct plat_stmmacenet_data *plat = priv->plat;
+	struct timespec64 time;
+	int i, ret = 0;
+
+	if (!priv->dma_cap.estsel)
+		return -EOPNOTSUPP;
+
+	switch (wid) {
+	case 0x1:
+		wid = 16;
+		break;
+	case 0x2:
+		wid = 20;
+		break;
+	case 0x3:
+		wid = 24;
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	switch (dep) {
+	case 0x1:
+		dep = 64;
+		break;
+	case 0x2:
+		dep = 128;
+		break;
+	case 0x3:
+		dep = 256;
+		break;
+	case 0x4:
+		dep = 512;
+		break;
+	case 0x5:
+		dep = 1024;
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	if (!qopt->enable)
+		goto disable;
+	if (qopt->num_entries >= dep)
+		return -EINVAL;
+	if (!qopt->base_time)
+		return -ERANGE;
+	if (!qopt->cycle_time)
+		return -ERANGE;
+
+	if (!plat->est) {
+		plat->est = devm_kzalloc(priv->device, sizeof(*plat->est),
+					 GFP_KERNEL);
+		if (!plat->est)
+			return -ENOMEM;
+	} else {
+		memset(plat->est, 0, sizeof(*plat->est));
+	}
+
+	size = qopt->num_entries;
+
+	priv->plat->est->gcl_size = size;
+	priv->plat->est->enable = qopt->enable;
+
+	for (i = 0; i < size; i++) {
+		s64 delta_ns = qopt->entries[i].interval;
+		u32 gates = qopt->entries[i].gate_mask;
+
+		if (delta_ns > GENMASK(wid, 0))
+			return -ERANGE;
+		if (gates > GENMASK(31 - wid, 0))
+			return -ERANGE;
+		if (qopt->entries[i].command != TC_TAPRIO_CMD_SET_GATES)
+			return -EOPNOTSUPP;
+
+		priv->plat->est->gcl[i] = delta_ns | (gates << wid);
+	}
+
+	/* Adjust for real system time */
+	time = ktime_to_timespec64(qopt->base_time);
+	priv->plat->est->btr[0] = (u32)time.tv_nsec;
+	priv->plat->est->btr[1] = (u32)time.tv_sec;
+
+	priv->plat->est->ctr[0] = (u32)(qopt->cycle_time % NSEC_PER_SEC);
+	priv->plat->est->ctr[1] = (u32)(qopt->cycle_time / NSEC_PER_SEC);
+
+	ret = stmmac_est_configure(priv, priv->ioaddr, priv->plat->est,
+				   priv->plat->clk_ptp_rate);
+	if (ret) {
+		netdev_err(priv->dev, "failed to configure EST\n");
+		goto disable;
+	}
+
+	netdev_info(priv->dev, "configured EST\n");
+	return 0;
+
+disable:
+	priv->plat->est->enable = false;
+	stmmac_est_configure(priv, priv->ioaddr, priv->plat->est,
+			     priv->plat->clk_ptp_rate);
+	return ret;
+}
+
 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,
 };
-- 
2.7.4


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