[net-next PATCH v3 1/4] devicetree: Add compatible string for Zynq Ultrascale+ MPSoC

[net-next PATCH v3 1/4] devicetree: Add compatible string for Zynq Ultrascale+ MPSoC

[Harini Katakam]

Add "cdns,zynqmp-gem" to be used for Zynq Ultrascale+ MPSoC.

Signed-off-by: Harini Katakam <harinik-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
Reviewed-by: Punnaiah Choudary Kalluri <punnaia-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
---

v3:
No changes

v2:
Updated SoC name

---
 Documentation/devicetree/bindings/net/macb.txt |    1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/net/macb.txt b/Documentation/devicetree/bindings/net/macb.txt
index ba19d67..8ec5fdf 100644
--- a/Documentation/devicetree/bindings/net/macb.txt
+++ b/Documentation/devicetree/bindings/net/macb.txt
@@ -9,6 +9,7 @@ Required properties:
   the Cadence GEM, or the generic form: "cdns,gem".
   Use "cdns,sama5d3-gem" for the Gigabit IP available on Atmel sama5d3 SoCs.
   Use "cdns,sama5d4-gem" for the Gigabit IP available on Atmel sama5d4 SoCs.
+  Use "cdns,zynqmp-gem" for Zynq Ultrascale+ MPSoC.
 - reg: Address and length of the register set for the device
 - interrupts: Should contain macb interrupt
 - phy-mode: See ethernet.txt file in the same directory.
-- 
1.7.9.5

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[net-next PATCH v3 1/4] devicetree: Add compatible string for Zynq Ultrascale+ MPSoC

[Harini Katakam]

Add "cdns,zynqmp-gem" to be used for Zynq Ultrascale+ MPSoC.

Signed-off-by: Harini Katakam <harinik-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
Reviewed-by: Punnaiah Choudary Kalluri <punnaia-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
---

v3:
No changes

v2:
Updated SoC name

---
 Documentation/devicetree/bindings/net/macb.txt |    1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/net/macb.txt b/Documentation/devicetree/bindings/net/macb.txt
index ba19d67..8ec5fdf 100644
--- a/Documentation/devicetree/bindings/net/macb.txt
+++ b/Documentation/devicetree/bindings/net/macb.txt
@@ -9,6 +9,7 @@ Required properties:
   the Cadence GEM, or the generic form: "cdns,gem".
   Use "cdns,sama5d3-gem" for the Gigabit IP available on Atmel sama5d3 SoCs.
   Use "cdns,sama5d4-gem" for the Gigabit IP available on Atmel sama5d4 SoCs.
+  Use "cdns,zynqmp-gem" for Zynq Ultrascale+ MPSoC.
 - reg: Address and length of the register set for the device
 - interrupts: Should contain macb interrupt
 - phy-mode: See ethernet.txt file in the same directory.
-- 
1.7.9.5

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[net-next PATCH v3 1/4] devicetree: Add compatible string for Zynq Ultrascale+ MPSoC

[Harini Katakam]

Add "cdns,zynqmp-gem" to be used for Zynq Ultrascale+ MPSoC.

Signed-off-by: Harini Katakam <harinik@xilinx.com>
Reviewed-by: Punnaiah Choudary Kalluri <punnaia@xilinx.com>
---

v3:
No changes

v2:
Updated SoC name

---
 Documentation/devicetree/bindings/net/macb.txt |    1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/net/macb.txt b/Documentation/devicetree/bindings/net/macb.txt
index ba19d67..8ec5fdf 100644
--- a/Documentation/devicetree/bindings/net/macb.txt
+++ b/Documentation/devicetree/bindings/net/macb.txt
@@ -9,6 +9,7 @@ Required properties:
   the Cadence GEM, or the generic form: "cdns,gem".
   Use "cdns,sama5d3-gem" for the Gigabit IP available on Atmel sama5d3 SoCs.
   Use "cdns,sama5d4-gem" for the Gigabit IP available on Atmel sama5d4 SoCs.
+  Use "cdns,zynqmp-gem" for Zynq Ultrascale+ MPSoC.
 - reg: Address and length of the register set for the device
 - interrupts: Should contain macb interrupt
 - phy-mode: See ethernet.txt file in the same directory.
-- 
1.7.9.5

[net-next PATCH v3 2/4] net: macb: Add compatible string for Zynq Ultrascale+ MPSoC

[Harini Katakam]

Add compatible string and config structure for Zynq Ultrascale+ MPSoC

Signed-off-by: Harini Katakam <harinik@xilinx.com>
Reviewed-by: Punnaiah Choudary Kalluri <punnaia@xilinx.com>
---

Added in v3

---
 drivers/net/ethernet/cadence/macb.c |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
index 4104d49..bbe5656 100644
--- a/drivers/net/ethernet/cadence/macb.c
+++ b/drivers/net/ethernet/cadence/macb.c
@@ -2684,6 +2684,13 @@ static const struct macb_config emac_config = {
 	.init = at91ether_init,
 };
 
+static const struct macb_config zynqmp_config = {
+	.caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE,
+	.dma_burst_length = 16,
+	.clk_init = macb_clk_init,
+	.init = macb_init,
+};
+
 static const struct of_device_id macb_dt_ids[] = {
 	{ .compatible = "cdns,at32ap7000-macb" },
 	{ .compatible = "cdns,at91sam9260-macb", .data = &at91sam9260_config },
@@ -2694,6 +2701,7 @@ static const struct of_device_id macb_dt_ids[] = {
 	{ .compatible = "atmel,sama5d4-gem", .data = &sama5d4_config },
 	{ .compatible = "cdns,at91rm9200-emac", .data = &emac_config },
 	{ .compatible = "cdns,emac", .data = &emac_config },
+	{ .compatible = "cdns,zynqmp-gem", .data = &zynqmp_config},
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, macb_dt_ids);
-- 
1.7.9.5

[net-next PATCH v3 2/4] net: macb: Add compatible string for Zynq Ultrascale+ MPSoC

[Harini Katakam]

Add compatible string and config structure for Zynq Ultrascale+ MPSoC

Signed-off-by: Harini Katakam <harinik@xilinx.com>
Reviewed-by: Punnaiah Choudary Kalluri <punnaia@xilinx.com>
---

Added in v3

---
 drivers/net/ethernet/cadence/macb.c |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
index 4104d49..bbe5656 100644
--- a/drivers/net/ethernet/cadence/macb.c
+++ b/drivers/net/ethernet/cadence/macb.c
@@ -2684,6 +2684,13 @@ static const struct macb_config emac_config = {
 	.init = at91ether_init,
 };
 
+static const struct macb_config zynqmp_config = {
+	.caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE,
+	.dma_burst_length = 16,
+	.clk_init = macb_clk_init,
+	.init = macb_init,
+};
+
 static const struct of_device_id macb_dt_ids[] = {
 	{ .compatible = "cdns,at32ap7000-macb" },
 	{ .compatible = "cdns,at91sam9260-macb", .data = &at91sam9260_config },
@@ -2694,6 +2701,7 @@ static const struct of_device_id macb_dt_ids[] = {
 	{ .compatible = "atmel,sama5d4-gem", .data = &sama5d4_config },
 	{ .compatible = "cdns,at91rm9200-emac", .data = &emac_config },
 	{ .compatible = "cdns,emac", .data = &emac_config },
+	{ .compatible = "cdns,zynqmp-gem", .data = &zynqmp_config},
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, macb_dt_ids);
-- 
1.7.9.5

Re: [net-next PATCH v3 2/4] net: macb: Add compatible string for Zynq Ultrascale+ MPSoC

[David Miller]

From: Harini Katakam <harini.katakam@xilinx.com>
Date: Wed, 6 May 2015 22:27:16 +0530

> Add compatible string and config structure for Zynq Ultrascale+ MPSoC
> 
> Signed-off-by: Harini Katakam <harinik@xilinx.com>
> Reviewed-by: Punnaiah Choudary Kalluri <punnaia@xilinx.com>

Applied.

[net-next PATCH v3 3/4] net: macb: Add support for jumbo frames

[Harini Katakam]

Enable jumbo frame support for Zynq Ultrascale+ MPSoC.
Update the NWCFG register and descriptor length masks accordingly.
Jumbo max length register should be set according to support in SoC; it is
set to 10240 for Zynq Ultrascale+ MPSoC.

Signed-off-by: Harini Katakam <harinik@xilinx.com>
Reviewed-by: Punnaiah Choudary Kalluri <punnaia@xilinx.com>
---

v3:
Use macb_config for declaring jumbo capability and max size.

v2:
Add constant definition and update SoC name

---
 drivers/net/ethernet/cadence/macb.c |   22 ++++++++++++++++++----
 drivers/net/ethernet/cadence/macb.h |    9 +++++++++
 2 files changed, 27 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
index bbe5656..cb84587 100644
--- a/drivers/net/ethernet/cadence/macb.c
+++ b/drivers/net/ethernet/cadence/macb.c
@@ -782,7 +782,7 @@ static int gem_rx(struct macb *bp, int budget)
 		}
 		/* now everything is ready for receiving packet */
 		bp->rx_skbuff[entry] = NULL;
-		len = MACB_BFEXT(RX_FRMLEN, ctrl);
+		len = ctrl & bp->rx_frm_len_mask;
 
 		netdev_vdbg(bp->dev, "gem_rx %u (len %u)\n", entry, len);
 
@@ -828,7 +828,7 @@ static int macb_rx_frame(struct macb *bp, unsigned int first_frag,
 	struct macb_dma_desc *desc;
 
 	desc = macb_rx_desc(bp, last_frag);
-	len = MACB_BFEXT(RX_FRMLEN, desc->ctrl);
+	len = desc->ctrl & bp->rx_frm_len_mask;
 
 	netdev_vdbg(bp->dev, "macb_rx_frame frags %u - %u (len %u)\n",
 		macb_rx_ring_wrap(first_frag),
@@ -1633,7 +1633,10 @@ static void macb_init_hw(struct macb *bp)
 	config |= MACB_BF(RBOF, NET_IP_ALIGN);	/* Make eth data aligned */
 	config |= MACB_BIT(PAE);		/* PAuse Enable */
 	config |= MACB_BIT(DRFCS);		/* Discard Rx FCS */
-	config |= MACB_BIT(BIG);		/* Receive oversized frames */
+	if (bp->caps | MACB_CAPS_JUMBO)
+		config |= MACB_BIT(JFRAME);	/* Enable jumbo frames */
+	else
+		config |= MACB_BIT(BIG);	/* Receive oversized frames */
 	if (bp->dev->flags & IFF_PROMISC)
 		config |= MACB_BIT(CAF);	/* Copy All Frames */
 	else if (macb_is_gem(bp) && bp->dev->features & NETIF_F_RXCSUM)
@@ -1642,8 +1645,13 @@ static void macb_init_hw(struct macb *bp)
 		config |= MACB_BIT(NBC);	/* No BroadCast */
 	config |= macb_dbw(bp);
 	macb_writel(bp, NCFGR, config);
+	if ((bp->caps | MACB_CAPS_JUMBO) && bp->jumbo_max_len)
+		gem_writel(bp, JML, bp->jumbo_max_len);
 	bp->speed = SPEED_10;
 	bp->duplex = DUPLEX_HALF;
+	bp->rx_frm_len_mask = MACB_RX_FRMLEN_MASK;
+	if (bp->caps | MACB_CAPS_JUMBO)
+		bp->rx_frm_len_mask = MACB_RX_JFRMLEN_MASK;
 
 	macb_configure_dma(bp);
 
@@ -2685,10 +2693,12 @@ static const struct macb_config emac_config = {
 };
 
 static const struct macb_config zynqmp_config = {
-	.caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE,
+	.caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE |
+		MACB_CAPS_JUMBO,
 	.dma_burst_length = 16,
 	.clk_init = macb_clk_init,
 	.init = macb_init,
+	.jumbo_max_len = 10240,
 };
 
 static const struct of_device_id macb_dt_ids[] = {
@@ -2770,6 +2780,10 @@ static int macb_probe(struct platform_device *pdev)
 	bp->pclk = pclk;
 	bp->hclk = hclk;
 	bp->tx_clk = tx_clk;
+	if (macb_config->jumbo_max_len) {
+		bp->jumbo_max_len = macb_config->jumbo_max_len;
+	}
+
 	spin_lock_init(&bp->lock);
 
 	/* setup capabilities */
diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h
index eb7d76f..7d4ef51 100644
--- a/drivers/net/ethernet/cadence/macb.h
+++ b/drivers/net/ethernet/cadence/macb.h
@@ -71,6 +71,7 @@
 #define GEM_NCFGR		0x0004 /* Network Config */
 #define GEM_USRIO		0x000c /* User IO */
 #define GEM_DMACFG		0x0010 /* DMA Configuration */
+#define GEM_JML			0x0048 /* Jumbo Max Length */
 #define GEM_HRB			0x0080 /* Hash Bottom */
 #define GEM_HRT			0x0084 /* Hash Top */
 #define GEM_SA1B		0x0088 /* Specific1 Bottom */
@@ -397,6 +398,7 @@
 #define MACB_CAPS_GIGABIT_MODE_AVAILABLE	0x20000000
 #define MACB_CAPS_SG_DISABLED			0x40000000
 #define MACB_CAPS_MACB_IS_GEM			0x80000000
+#define MACB_CAPS_JUMBO				0x00000008
 
 /* Bit manipulation macros */
 #define MACB_BIT(name)					\
@@ -514,6 +516,9 @@ struct macb_dma_desc {
 #define MACB_RX_BROADCAST_OFFSET		31
 #define MACB_RX_BROADCAST_SIZE			1
 
+#define MACB_RX_FRMLEN_MASK			0xFFF
+#define MACB_RX_JFRMLEN_MASK			0x3FFF
+
 /* RX checksum offload disabled: bit 24 clear in NCFGR */
 #define GEM_RX_TYPEID_MATCH_OFFSET		22
 #define GEM_RX_TYPEID_MATCH_SIZE		2
@@ -757,6 +762,7 @@ struct macb_config {
 	int	(*clk_init)(struct platform_device *pdev, struct clk **pclk,
 			    struct clk **hclk, struct clk **tx_clk);
 	int	(*init)(struct platform_device *pdev);
+	int	jumbo_max_len;
 };
 
 struct macb_queue {
@@ -826,6 +832,9 @@ struct macb {
 	unsigned int		max_tx_length;
 
 	u64			ethtool_stats[GEM_STATS_LEN];
+
+	unsigned int		rx_frm_len_mask;
+	unsigned int		jumbo_max_len;
 };
 
 static inline bool macb_is_gem(struct macb *bp)
-- 
1.7.9.5

[net-next PATCH v3 3/4] net: macb: Add support for jumbo frames

[Harini Katakam]

Enable jumbo frame support for Zynq Ultrascale+ MPSoC.
Update the NWCFG register and descriptor length masks accordingly.
Jumbo max length register should be set according to support in SoC; it is
set to 10240 for Zynq Ultrascale+ MPSoC.

Signed-off-by: Harini Katakam <harinik@xilinx.com>
Reviewed-by: Punnaiah Choudary Kalluri <punnaia@xilinx.com>
---

v3:
Use macb_config for declaring jumbo capability and max size.

v2:
Add constant definition and update SoC name

---
 drivers/net/ethernet/cadence/macb.c |   22 ++++++++++++++++++----
 drivers/net/ethernet/cadence/macb.h |    9 +++++++++
 2 files changed, 27 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
index bbe5656..cb84587 100644
--- a/drivers/net/ethernet/cadence/macb.c
+++ b/drivers/net/ethernet/cadence/macb.c
@@ -782,7 +782,7 @@ static int gem_rx(struct macb *bp, int budget)
 		}
 		/* now everything is ready for receiving packet */
 		bp->rx_skbuff[entry] = NULL;
-		len = MACB_BFEXT(RX_FRMLEN, ctrl);
+		len = ctrl & bp->rx_frm_len_mask;
 
 		netdev_vdbg(bp->dev, "gem_rx %u (len %u)\n", entry, len);
 
@@ -828,7 +828,7 @@ static int macb_rx_frame(struct macb *bp, unsigned int first_frag,
 	struct macb_dma_desc *desc;
 
 	desc = macb_rx_desc(bp, last_frag);
-	len = MACB_BFEXT(RX_FRMLEN, desc->ctrl);
+	len = desc->ctrl & bp->rx_frm_len_mask;
 
 	netdev_vdbg(bp->dev, "macb_rx_frame frags %u - %u (len %u)\n",
 		macb_rx_ring_wrap(first_frag),
@@ -1633,7 +1633,10 @@ static void macb_init_hw(struct macb *bp)
 	config |= MACB_BF(RBOF, NET_IP_ALIGN);	/* Make eth data aligned */
 	config |= MACB_BIT(PAE);		/* PAuse Enable */
 	config |= MACB_BIT(DRFCS);		/* Discard Rx FCS */
-	config |= MACB_BIT(BIG);		/* Receive oversized frames */
+	if (bp->caps | MACB_CAPS_JUMBO)
+		config |= MACB_BIT(JFRAME);	/* Enable jumbo frames */
+	else
+		config |= MACB_BIT(BIG);	/* Receive oversized frames */
 	if (bp->dev->flags & IFF_PROMISC)
 		config |= MACB_BIT(CAF);	/* Copy All Frames */
 	else if (macb_is_gem(bp) && bp->dev->features & NETIF_F_RXCSUM)
@@ -1642,8 +1645,13 @@ static void macb_init_hw(struct macb *bp)
 		config |= MACB_BIT(NBC);	/* No BroadCast */
 	config |= macb_dbw(bp);
 	macb_writel(bp, NCFGR, config);
+	if ((bp->caps | MACB_CAPS_JUMBO) && bp->jumbo_max_len)
+		gem_writel(bp, JML, bp->jumbo_max_len);
 	bp->speed = SPEED_10;
 	bp->duplex = DUPLEX_HALF;
+	bp->rx_frm_len_mask = MACB_RX_FRMLEN_MASK;
+	if (bp->caps | MACB_CAPS_JUMBO)
+		bp->rx_frm_len_mask = MACB_RX_JFRMLEN_MASK;
 
 	macb_configure_dma(bp);
 
@@ -2685,10 +2693,12 @@ static const struct macb_config emac_config = {
 };
 
 static const struct macb_config zynqmp_config = {
-	.caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE,
+	.caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE |
+		MACB_CAPS_JUMBO,
 	.dma_burst_length = 16,
 	.clk_init = macb_clk_init,
 	.init = macb_init,
+	.jumbo_max_len = 10240,
 };
 
 static const struct of_device_id macb_dt_ids[] = {
@@ -2770,6 +2780,10 @@ static int macb_probe(struct platform_device *pdev)
 	bp->pclk = pclk;
 	bp->hclk = hclk;
 	bp->tx_clk = tx_clk;
+	if (macb_config->jumbo_max_len) {
+		bp->jumbo_max_len = macb_config->jumbo_max_len;
+	}
+
 	spin_lock_init(&bp->lock);
 
 	/* setup capabilities */
diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h
index eb7d76f..7d4ef51 100644
--- a/drivers/net/ethernet/cadence/macb.h
+++ b/drivers/net/ethernet/cadence/macb.h
@@ -71,6 +71,7 @@
 #define GEM_NCFGR		0x0004 /* Network Config */
 #define GEM_USRIO		0x000c /* User IO */
 #define GEM_DMACFG		0x0010 /* DMA Configuration */
+#define GEM_JML			0x0048 /* Jumbo Max Length */
 #define GEM_HRB			0x0080 /* Hash Bottom */
 #define GEM_HRT			0x0084 /* Hash Top */
 #define GEM_SA1B		0x0088 /* Specific1 Bottom */
@@ -397,6 +398,7 @@
 #define MACB_CAPS_GIGABIT_MODE_AVAILABLE	0x20000000
 #define MACB_CAPS_SG_DISABLED			0x40000000
 #define MACB_CAPS_MACB_IS_GEM			0x80000000
+#define MACB_CAPS_JUMBO				0x00000008
 
 /* Bit manipulation macros */
 #define MACB_BIT(name)					\
@@ -514,6 +516,9 @@ struct macb_dma_desc {
 #define MACB_RX_BROADCAST_OFFSET		31
 #define MACB_RX_BROADCAST_SIZE			1
 
+#define MACB_RX_FRMLEN_MASK			0xFFF
+#define MACB_RX_JFRMLEN_MASK			0x3FFF
+
 /* RX checksum offload disabled: bit 24 clear in NCFGR */
 #define GEM_RX_TYPEID_MATCH_OFFSET		22
 #define GEM_RX_TYPEID_MATCH_SIZE		2
@@ -757,6 +762,7 @@ struct macb_config {
 	int	(*clk_init)(struct platform_device *pdev, struct clk **pclk,
 			    struct clk **hclk, struct clk **tx_clk);
 	int	(*init)(struct platform_device *pdev);
+	int	jumbo_max_len;
 };
 
 struct macb_queue {
@@ -826,6 +832,9 @@ struct macb {
 	unsigned int		max_tx_length;
 
 	u64			ethtool_stats[GEM_STATS_LEN];
+
+	unsigned int		rx_frm_len_mask;
+	unsigned int		jumbo_max_len;
 };
 
 static inline bool macb_is_gem(struct macb *bp)
-- 
1.7.9.5

Re: [net-next PATCH v3 3/4] net: macb: Add support for jumbo frames

[David Miller]

From: Harini Katakam <harini.katakam@xilinx.com>
Date: Wed, 6 May 2015 22:27:17 +0530

> Enable jumbo frame support for Zynq Ultrascale+ MPSoC.
> Update the NWCFG register and descriptor length masks accordingly.
> Jumbo max length register should be set according to support in SoC; it is
> set to 10240 for Zynq Ultrascale+ MPSoC.
> 
> Signed-off-by: Harini Katakam <harinik@xilinx.com>
> Reviewed-by: Punnaiah Choudary Kalluri <punnaia@xilinx.com>

Applied.

[net-next PATCH v3 4/4] net: macb: Add change_mtu callback with jumbo support

[Harini Katakam]

Add macb_change_mtu callback; if jumbo frame support is present allow
mtu size changes upto (jumbo max length allowed - headers).

Signed-off-by: Harini Katakam <harinik-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
Reviewed-by: Punnaiah Choudary Kalluri <punnaia-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
---

v3:
Check for jumbo capability in macb_config.

v2:
Move constant definition.

---
 drivers/net/ethernet/cadence/macb.c |   24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
index cb84587..97c6646 100644
--- a/drivers/net/ethernet/cadence/macb.c
+++ b/drivers/net/ethernet/cadence/macb.c
@@ -54,6 +54,8 @@
 #define MACB_MAX_TX_LEN		((unsigned int)((1 << MACB_TX_FRMLEN_SIZE) - 1))
 #define GEM_MAX_TX_LEN		((unsigned int)((1 << GEM_TX_FRMLEN_SIZE) - 1))
 
+#define GEM_MTU_MIN_SIZE	68
+
 /*
  * Graceful stop timeouts in us. We should allow up to
  * 1 frame time (10 Mbits/s, full-duplex, ignoring collisions)
@@ -1855,6 +1857,26 @@ static int macb_close(struct net_device *dev)
 	return 0;
 }
 
+static int macb_change_mtu(struct net_device *dev, int new_mtu)
+{
+	struct macb *bp = netdev_priv(dev);
+	u32 max_mtu;
+
+	if (netif_running(dev))
+		return -EBUSY;
+
+	max_mtu = ETH_DATA_LEN;
+	if (bp->caps | MACB_CAPS_JUMBO)
+		max_mtu = gem_readl(bp, JML) - ETH_HLEN - ETH_FCS_LEN;
+
+	if ((new_mtu > max_mtu) || (new_mtu < GEM_MTU_MIN_SIZE))
+		return -EINVAL;
+
+	dev->mtu = new_mtu;
+
+	return 0;
+}
+
 static void gem_update_stats(struct macb *bp)
 {
 	int i;
@@ -2131,7 +2153,7 @@ static const struct net_device_ops macb_netdev_ops = {
 	.ndo_get_stats		= macb_get_stats,
 	.ndo_do_ioctl		= macb_ioctl,
 	.ndo_validate_addr	= eth_validate_addr,
-	.ndo_change_mtu		= eth_change_mtu,
+	.ndo_change_mtu		= macb_change_mtu,
 	.ndo_set_mac_address	= eth_mac_addr,
 #ifdef CONFIG_NET_POLL_CONTROLLER
 	.ndo_poll_controller	= macb_poll_controller,
-- 
1.7.9.5

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[net-next PATCH v3 4/4] net: macb: Add change_mtu callback with jumbo support

[Harini Katakam]

Add macb_change_mtu callback; if jumbo frame support is present allow
mtu size changes upto (jumbo max length allowed - headers).

Signed-off-by: Harini Katakam <harinik-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
Reviewed-by: Punnaiah Choudary Kalluri <punnaia-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
---

v3:
Check for jumbo capability in macb_config.

v2:
Move constant definition.

---
 drivers/net/ethernet/cadence/macb.c |   24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
index cb84587..97c6646 100644
--- a/drivers/net/ethernet/cadence/macb.c
+++ b/drivers/net/ethernet/cadence/macb.c
@@ -54,6 +54,8 @@
 #define MACB_MAX_TX_LEN		((unsigned int)((1 << MACB_TX_FRMLEN_SIZE) - 1))
 #define GEM_MAX_TX_LEN		((unsigned int)((1 << GEM_TX_FRMLEN_SIZE) - 1))
 
+#define GEM_MTU_MIN_SIZE	68
+
 /*
  * Graceful stop timeouts in us. We should allow up to
  * 1 frame time (10 Mbits/s, full-duplex, ignoring collisions)
@@ -1855,6 +1857,26 @@ static int macb_close(struct net_device *dev)
 	return 0;
 }
 
+static int macb_change_mtu(struct net_device *dev, int new_mtu)
+{
+	struct macb *bp = netdev_priv(dev);
+	u32 max_mtu;
+
+	if (netif_running(dev))
+		return -EBUSY;
+
+	max_mtu = ETH_DATA_LEN;
+	if (bp->caps | MACB_CAPS_JUMBO)
+		max_mtu = gem_readl(bp, JML) - ETH_HLEN - ETH_FCS_LEN;
+
+	if ((new_mtu > max_mtu) || (new_mtu < GEM_MTU_MIN_SIZE))
+		return -EINVAL;
+
+	dev->mtu = new_mtu;
+
+	return 0;
+}
+
 static void gem_update_stats(struct macb *bp)
 {
 	int i;
@@ -2131,7 +2153,7 @@ static const struct net_device_ops macb_netdev_ops = {
 	.ndo_get_stats		= macb_get_stats,
 	.ndo_do_ioctl		= macb_ioctl,
 	.ndo_validate_addr	= eth_validate_addr,
-	.ndo_change_mtu		= eth_change_mtu,
+	.ndo_change_mtu		= macb_change_mtu,
 	.ndo_set_mac_address	= eth_mac_addr,
 #ifdef CONFIG_NET_POLL_CONTROLLER
 	.ndo_poll_controller	= macb_poll_controller,
-- 
1.7.9.5

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[net-next PATCH v3 4/4] net: macb: Add change_mtu callback with jumbo support

[Harini Katakam]

Add macb_change_mtu callback; if jumbo frame support is present allow
mtu size changes upto (jumbo max length allowed - headers).

Signed-off-by: Harini Katakam <harinik@xilinx.com>
Reviewed-by: Punnaiah Choudary Kalluri <punnaia@xilinx.com>
---

v3:
Check for jumbo capability in macb_config.

v2:
Move constant definition.

---
 drivers/net/ethernet/cadence/macb.c |   24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
index cb84587..97c6646 100644
--- a/drivers/net/ethernet/cadence/macb.c
+++ b/drivers/net/ethernet/cadence/macb.c
@@ -54,6 +54,8 @@
 #define MACB_MAX_TX_LEN		((unsigned int)((1 << MACB_TX_FRMLEN_SIZE) - 1))
 #define GEM_MAX_TX_LEN		((unsigned int)((1 << GEM_TX_FRMLEN_SIZE) - 1))
 
+#define GEM_MTU_MIN_SIZE	68
+
 /*
  * Graceful stop timeouts in us. We should allow up to
  * 1 frame time (10 Mbits/s, full-duplex, ignoring collisions)
@@ -1855,6 +1857,26 @@ static int macb_close(struct net_device *dev)
 	return 0;
 }
 
+static int macb_change_mtu(struct net_device *dev, int new_mtu)
+{
+	struct macb *bp = netdev_priv(dev);
+	u32 max_mtu;
+
+	if (netif_running(dev))
+		return -EBUSY;
+
+	max_mtu = ETH_DATA_LEN;
+	if (bp->caps | MACB_CAPS_JUMBO)
+		max_mtu = gem_readl(bp, JML) - ETH_HLEN - ETH_FCS_LEN;
+
+	if ((new_mtu > max_mtu) || (new_mtu < GEM_MTU_MIN_SIZE))
+		return -EINVAL;
+
+	dev->mtu = new_mtu;
+
+	return 0;
+}
+
 static void gem_update_stats(struct macb *bp)
 {
 	int i;
@@ -2131,7 +2153,7 @@ static const struct net_device_ops macb_netdev_ops = {
 	.ndo_get_stats		= macb_get_stats,
 	.ndo_do_ioctl		= macb_ioctl,
 	.ndo_validate_addr	= eth_validate_addr,
-	.ndo_change_mtu		= eth_change_mtu,
+	.ndo_change_mtu		= macb_change_mtu,
 	.ndo_set_mac_address	= eth_mac_addr,
 #ifdef CONFIG_NET_POLL_CONTROLLER
 	.ndo_poll_controller	= macb_poll_controller,
-- 
1.7.9.5

Re: [net-next PATCH v3 4/4] net: macb: Add change_mtu callback with jumbo support

[David Miller]

From: Harini Katakam <harini.katakam@xilinx.com>
Date: Wed, 6 May 2015 22:27:18 +0530

> Add macb_change_mtu callback; if jumbo frame support is present allow
> mtu size changes upto (jumbo max length allowed - headers).
> 
> Signed-off-by: Harini Katakam <harinik@xilinx.com>
> Reviewed-by: Punnaiah Choudary Kalluri <punnaia@xilinx.com>

Applied.

Re: [net-next PATCH v3 1/4] devicetree: Add compatible string for Zynq Ultrascale+ MPSoC

[David Miller]

From: Harini Katakam <harini.katakam-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
Date: Wed, 6 May 2015 22:27:15 +0530

> Add "cdns,zynqmp-gem" to be used for Zynq Ultrascale+ MPSoC.
> 
> Signed-off-by: Harini Katakam <harinik-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
> Reviewed-by: Punnaiah Choudary Kalluri <punnaia-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>

Applied.
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Re: [net-next PATCH v3 1/4] devicetree: Add compatible string for Zynq Ultrascale+ MPSoC

[David Miller]

From: Harini Katakam <harini.katakam@xilinx.com>
Date: Wed, 6 May 2015 22:27:15 +0530

> Add "cdns,zynqmp-gem" to be used for Zynq Ultrascale+ MPSoC.
> 
> Signed-off-by: Harini Katakam <harinik@xilinx.com>
> Reviewed-by: Punnaiah Choudary Kalluri <punnaia@xilinx.com>

Applied.

Re: [net-next PATCH v3 1/4] devicetree: Add compatible string for Zynq Ultrascale+ MPSoC

[Nicolas Ferre]

Le 06/05/2015 18:57, Harini Katakam a écrit :
> Add "cdns,zynqmp-gem" to be used for Zynq Ultrascale+ MPSoC.
> 
> Signed-off-by: Harini Katakam <harinik@xilinx.com>
> Reviewed-by: Punnaiah Choudary Kalluri <punnaia@xilinx.com>

I know it's too late, but for the record:
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

Thanks for having re-spinned this series Harini.

Bye,


> ---
> 
> v3:
> No changes
> 
> v2:
> Updated SoC name
> 
> ---
>  Documentation/devicetree/bindings/net/macb.txt |    1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/macb.txt b/Documentation/devicetree/bindings/net/macb.txt
> index ba19d67..8ec5fdf 100644
> --- a/Documentation/devicetree/bindings/net/macb.txt
> +++ b/Documentation/devicetree/bindings/net/macb.txt
> @@ -9,6 +9,7 @@ Required properties:
>    the Cadence GEM, or the generic form: "cdns,gem".
>    Use "cdns,sama5d3-gem" for the Gigabit IP available on Atmel sama5d3 SoCs.
>    Use "cdns,sama5d4-gem" for the Gigabit IP available on Atmel sama5d4 SoCs.
> +  Use "cdns,zynqmp-gem" for Zynq Ultrascale+ MPSoC.
>  - reg: Address and length of the register set for the device
>  - interrupts: Should contain macb interrupt
>  - phy-mode: See ethernet.txt file in the same directory.
> 


-- 
Nicolas Ferre

Re: [net-next PATCH v3 1/4] devicetree: Add compatible string for Zynq Ultrascale+ MPSoC

[Nicolas Ferre]

Le 06/05/2015 18:57, Harini Katakam a écrit :
> Add "cdns,zynqmp-gem" to be used for Zynq Ultrascale+ MPSoC.
> 
> Signed-off-by: Harini Katakam <harinik@xilinx.com>
> Reviewed-by: Punnaiah Choudary Kalluri <punnaia@xilinx.com>

I know it's too late, but for the record:
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

Thanks for having re-spinned this series Harini.

Bye,


> ---
> 
> v3:
> No changes
> 
> v2:
> Updated SoC name
> 
> ---
>  Documentation/devicetree/bindings/net/macb.txt |    1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/macb.txt b/Documentation/devicetree/bindings/net/macb.txt
> index ba19d67..8ec5fdf 100644
> --- a/Documentation/devicetree/bindings/net/macb.txt
> +++ b/Documentation/devicetree/bindings/net/macb.txt
> @@ -9,6 +9,7 @@ Required properties:
>    the Cadence GEM, or the generic form: "cdns,gem".
>    Use "cdns,sama5d3-gem" for the Gigabit IP available on Atmel sama5d3 SoCs.
>    Use "cdns,sama5d4-gem" for the Gigabit IP available on Atmel sama5d4 SoCs.
> +  Use "cdns,zynqmp-gem" for Zynq Ultrascale+ MPSoC.
>  - reg: Address and length of the register set for the device
>  - interrupts: Should contain macb interrupt
>  - phy-mode: See ethernet.txt file in the same directory.
> 


-- 
Nicolas Ferre

Re: [net-next PATCH v3 1/4] devicetree: Add compatible string for Zynq Ultrascale+ MPSoC

[Harini Katakam]

On Mon, May 11, 2015 at 1:11 PM, Nicolas Ferre <nicolas.ferre@atmel.com> wrote:
> Le 06/05/2015 18:57, Harini Katakam a écrit :
>> Add "cdns,zynqmp-gem" to be used for Zynq Ultrascale+ MPSoC.
>>
>> Signed-off-by: Harini Katakam <harinik@xilinx.com>
>> Reviewed-by: Punnaiah Choudary Kalluri <punnaia@xilinx.com>
>
> I know it's too late, but for the record:
> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

Thanks!

Regards,
Harini

>
> Thanks for having re-spinned this series Harini.
>
> Bye,
>
>
>> ---
>>
>> v3:
>> No changes
>>
>> v2:
>> Updated SoC name
>>
>> ---
>>  Documentation/devicetree/bindings/net/macb.txt |    1 +
>>  1 file changed, 1 insertion(+)
>>
>> diff --git a/Documentation/devicetree/bindings/net/macb.txt b/Documentation/devicetree/bindings/net/macb.txt
>> index ba19d67..8ec5fdf 100644
>> --- a/Documentation/devicetree/bindings/net/macb.txt
>> +++ b/Documentation/devicetree/bindings/net/macb.txt
>> @@ -9,6 +9,7 @@ Required properties:
>>    the Cadence GEM, or the generic form: "cdns,gem".
>>    Use "cdns,sama5d3-gem" for the Gigabit IP available on Atmel sama5d3 SoCs.
>>    Use "cdns,sama5d4-gem" for the Gigabit IP available on Atmel sama5d4 SoCs.
>> +  Use "cdns,zynqmp-gem" for Zynq Ultrascale+ MPSoC.
>>  - reg: Address and length of the register set for the device
>>  - interrupts: Should contain macb interrupt
>>  - phy-mode: See ethernet.txt file in the same directory.
>>
>
>
> --
> Nicolas Ferre