Merge tag 'mvebu' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC updates for Marvell mvebu/kirkwood from Olof Johansson:
 "This is a branch with updates for Marvell's mvebu/kirkwood platforms.
  They came in late-ish, and were heavily interdependent such that it
  didn't make sense to split them up across the cross-platform topic
  branches.  So here they are (for the second release in a row) in a
  branch on their own."

* tag 'mvebu' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (88 commits)
  arm: l2x0: add aurora related properties to OF binding
  arm: mvebu: add Aurora L2 Cache Controller to the DT
  arm: mvebu: add L2 cache support
  dma: mv_xor: fix error handling path
  dma: mv_xor: fix error checking of irq_of_parse_and_map()
  dma: mv_xor: use request_irq() instead of devm_request_irq()
  dma: mv_xor: clear the window override control registers
  arm: mvebu: fix address decoding armada_cfg_base() function
  ARM: mvebu: update defconfig with I2C and RTC support
  ARM: mvebu: Add SATA support for OpenBlocks AX3-4
  ARM: mvebu: Add support for the RTC in OpenBlocks AX3-4
  ARM: mvebu: Add support for I2C on OpenBlocks AX3-4
  ARM: mvebu: Add support for I2C controllers in Armada 370/XP
  arm: mvebu: Add hardware I/O Coherency support
  arm: plat-orion: Add coherency attribute when setup mbus target
  arm: dma mapping: Export a dma ops function arm_dma_set_mask
  arm: mvebu: Add SMP support for Armada XP
  arm: mm: Add support for PJ4B cpu and init routines
  arm: mvebu: Add IPI support via doorbells
  arm: mvebu: Add initial support for power managmement service unit
  ...

4 files changed, 3102 insertions, 0 deletions

diff --git a/drivers/net/ethernet/marvell/Kconfig b/drivers/net/ethernet/marvell/Kconfig
index 0029934748bc..edfba9370922 100644
--- a/drivers/net/ethernet/marvell/Kconfig
+++ b/drivers/net/ethernet/marvell/Kconfig
@@ -31,6 +31,30 @@ config MV643XX_ETH
 	  Some boards that use the Discovery chipset are the Momenco
 	  Ocelot C and Jaguar ATX and Pegasos II.
 
+config MVMDIO
+	tristate "Marvell MDIO interface support"
+	---help---
+	  This driver supports the MDIO interface found in the network
+	  interface units of the Marvell EBU SoCs (Kirkwood, Orion5x,
+	  Dove, Armada 370 and Armada XP).
+
+	  For now, this driver is only needed for the MVNETA driver
+	  (used on Armada 370 and XP), but it could be used in the
+	  future by the MV643XX_ETH driver.
+
+config MVNETA
+	tristate "Marvell Armada 370/XP network interface support"
+	depends on MACH_ARMADA_370_XP
+	select PHYLIB
+	select MVMDIO
+	---help---
+	  This driver supports the network interface units in the
+	  Marvell ARMADA XP and ARMADA 370 SoC family.
+
+	  Note that this driver is distinct from the mv643xx_eth
+	  driver, which should be used for the older Marvell SoCs
+	  (Dove, Orion, Discovery, Kirkwood).
+
 config PXA168_ETH
 	tristate "Marvell pxa168 ethernet support"
 	depends on CPU_PXA168
diff --git a/drivers/net/ethernet/marvell/Makefile b/drivers/net/ethernet/marvell/Makefile
index 57e3234a37ba..7f63b4aac434 100644
--- a/drivers/net/ethernet/marvell/Makefile
+++ b/drivers/net/ethernet/marvell/Makefile
@@ -3,6 +3,8 @@
 #
 
 obj-$(CONFIG_MV643XX_ETH) += mv643xx_eth.o
+obj-$(CONFIG_MVMDIO) += mvmdio.o
+obj-$(CONFIG_MVNETA) += mvneta.o
 obj-$(CONFIG_PXA168_ETH) += pxa168_eth.o
 obj-$(CONFIG_SKGE) += skge.o
 obj-$(CONFIG_SKY2) += sky2.o
diff --git a/drivers/net/ethernet/marvell/mvmdio.c b/drivers/net/ethernet/marvell/mvmdio.c
new file mode 100644
index 000000000000..6d6002bab060
--- /dev/null
+++ b/drivers/net/ethernet/marvell/mvmdio.c
@@ -0,0 +1,228 @@
+/*
+ * Driver for the MDIO interface of Marvell network interfaces.
+ *
+ * Since the MDIO interface of Marvell network interfaces is shared
+ * between all network interfaces, having a single driver allows to
+ * handle concurrent accesses properly (you may have four Ethernet
+ * ports, but they in fact share the same SMI interface to access the
+ * MDIO bus). Moreover, this MDIO interface code is similar between
+ * the mv643xx_eth driver and the mvneta driver. For now, it is only
+ * used by the mvneta driver, but it could later be used by the
+ * mv643xx_eth driver as well.
+ *
+ * Copyright (C) 2012 Marvell
+ *
+ * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/phy.h>
+#include <linux/of_address.h>
+#include <linux/of_mdio.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+
+#define MVMDIO_SMI_DATA_SHIFT              0
+#define MVMDIO_SMI_PHY_ADDR_SHIFT          16
+#define MVMDIO_SMI_PHY_REG_SHIFT           21
+#define MVMDIO_SMI_READ_OPERATION          BIT(26)
+#define MVMDIO_SMI_WRITE_OPERATION         0
+#define MVMDIO_SMI_READ_VALID              BIT(27)
+#define MVMDIO_SMI_BUSY                    BIT(28)
+
+struct orion_mdio_dev {
+	struct mutex lock;
+	void __iomem *smireg;
+};
+
+/* Wait for the SMI unit to be ready for another operation
+ */
+static int orion_mdio_wait_ready(struct mii_bus *bus)
+{
+	struct orion_mdio_dev *dev = bus->priv;
+	int count;
+	u32 val;
+
+	count = 0;
+	while (1) {
+		val = readl(dev->smireg);
+		if (!(val & MVMDIO_SMI_BUSY))
+			break;
+
+		if (count > 100) {
+			dev_err(bus->parent, "Timeout: SMI busy for too long\n");
+			return -ETIMEDOUT;
+		}
+
+		udelay(10);
+		count++;
+	}
+
+	return 0;
+}
+
+static int orion_mdio_read(struct mii_bus *bus, int mii_id,
+			   int regnum)
+{
+	struct orion_mdio_dev *dev = bus->priv;
+	int count;
+	u32 val;
+	int ret;
+
+	mutex_lock(&dev->lock);
+
+	ret = orion_mdio_wait_ready(bus);
+	if (ret < 0) {
+		mutex_unlock(&dev->lock);
+		return ret;
+	}
+
+	writel(((mii_id << MVMDIO_SMI_PHY_ADDR_SHIFT) |
+		(regnum << MVMDIO_SMI_PHY_REG_SHIFT)  |
+		MVMDIO_SMI_READ_OPERATION),
+	       dev->smireg);
+
+	/* Wait for the value to become available */
+	count = 0;
+	while (1) {
+		val = readl(dev->smireg);
+		if (val & MVMDIO_SMI_READ_VALID)
+			break;
+
+		if (count > 100) {
+			dev_err(bus->parent, "Timeout when reading PHY\n");
+			mutex_unlock(&dev->lock);
+			return -ETIMEDOUT;
+		}
+
+		udelay(10);
+		count++;
+	}
+
+	mutex_unlock(&dev->lock);
+
+	return val & 0xFFFF;
+}
+
+static int orion_mdio_write(struct mii_bus *bus, int mii_id,
+			    int regnum, u16 value)
+{
+	struct orion_mdio_dev *dev = bus->priv;
+	int ret;
+
+	mutex_lock(&dev->lock);
+
+	ret = orion_mdio_wait_ready(bus);
+	if (ret < 0) {
+		mutex_unlock(&dev->lock);
+		return ret;
+	}
+
+	writel(((mii_id << MVMDIO_SMI_PHY_ADDR_SHIFT) |
+		(regnum << MVMDIO_SMI_PHY_REG_SHIFT)  |
+		MVMDIO_SMI_WRITE_OPERATION            |
+		(value << MVMDIO_SMI_DATA_SHIFT)),
+	       dev->smireg);
+
+	mutex_unlock(&dev->lock);
+
+	return 0;
+}
+
+static int orion_mdio_reset(struct mii_bus *bus)
+{
+	return 0;
+}
+
+static int __devinit orion_mdio_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct mii_bus *bus;
+	struct orion_mdio_dev *dev;
+	int i, ret;
+
+	bus = mdiobus_alloc_size(sizeof(struct orion_mdio_dev));
+	if (!bus) {
+		dev_err(&pdev->dev, "Cannot allocate MDIO bus\n");
+		return -ENOMEM;
+	}
+
+	bus->name = "orion_mdio_bus";
+	bus->read = orion_mdio_read;
+	bus->write = orion_mdio_write;
+	bus->reset = orion_mdio_reset;
+	snprintf(bus->id, MII_BUS_ID_SIZE, "%s-mii",
+		 dev_name(&pdev->dev));
+	bus->parent = &pdev->dev;
+
+	bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
+	if (!bus->irq) {
+		dev_err(&pdev->dev, "Cannot allocate PHY IRQ array\n");
+		mdiobus_free(bus);
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < PHY_MAX_ADDR; i++)
+		bus->irq[i] = PHY_POLL;
+
+	dev = bus->priv;
+	dev->smireg = of_iomap(pdev->dev.of_node, 0);
+	if (!dev->smireg) {
+		dev_err(&pdev->dev, "No SMI register address given in DT\n");
+		kfree(bus->irq);
+		mdiobus_free(bus);
+		return -ENODEV;
+	}
+
+	mutex_init(&dev->lock);
+
+	ret = of_mdiobus_register(bus, np);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Cannot register MDIO bus (%d)\n", ret);
+		iounmap(dev->smireg);
+		kfree(bus->irq);
+		mdiobus_free(bus);
+		return ret;
+	}
+
+	platform_set_drvdata(pdev, bus);
+
+	return 0;
+}
+
+static int __devexit orion_mdio_remove(struct platform_device *pdev)
+{
+	struct mii_bus *bus = platform_get_drvdata(pdev);
+	mdiobus_unregister(bus);
+	kfree(bus->irq);
+	mdiobus_free(bus);
+	return 0;
+}
+
+static const struct of_device_id orion_mdio_match[] = {
+	{ .compatible = "marvell,orion-mdio" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, orion_mdio_match);
+
+static struct platform_driver orion_mdio_driver = {
+	.probe = orion_mdio_probe,
+	.remove = __devexit_p(orion_mdio_remove),
+	.driver = {
+		.name = "orion-mdio",
+		.of_match_table = orion_mdio_match,
+	},
+};
+
+module_platform_driver(orion_mdio_driver);
+
+MODULE_DESCRIPTION("Marvell MDIO interface driver");
+MODULE_AUTHOR("Thomas Petazzoni <thomas.petazzoni@free-electrons.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
new file mode 100644
index 000000000000..3f8086b9f5e5
--- /dev/null
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -0,0 +1,2848 @@
+/*
+ * Driver for Marvell NETA network card for Armada XP and Armada 370 SoCs.
+ *
+ * Copyright (C) 2012 Marvell
+ *
+ * Rami Rosen <rosenr@marvell.com>
+ * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/version.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/platform_device.h>
+#include <linux/skbuff.h>
+#include <linux/inetdevice.h>
+#include <linux/mbus.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <net/ip.h>
+#include <net/ipv6.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_mdio.h>
+#include <linux/of_net.h>
+#include <linux/of_address.h>
+#include <linux/phy.h>
+#include <linux/clk.h>
+
+/* Registers */
+#define MVNETA_RXQ_CONFIG_REG(q)                (0x1400 + ((q) << 2))
+#define      MVNETA_RXQ_HW_BUF_ALLOC            BIT(1)
+#define      MVNETA_RXQ_PKT_OFFSET_ALL_MASK     (0xf    << 8)
+#define      MVNETA_RXQ_PKT_OFFSET_MASK(offs)   ((offs) << 8)
+#define MVNETA_RXQ_THRESHOLD_REG(q)             (0x14c0 + ((q) << 2))
+#define      MVNETA_RXQ_NON_OCCUPIED(v)         ((v) << 16)
+#define MVNETA_RXQ_BASE_ADDR_REG(q)             (0x1480 + ((q) << 2))
+#define MVNETA_RXQ_SIZE_REG(q)                  (0x14a0 + ((q) << 2))
+#define      MVNETA_RXQ_BUF_SIZE_SHIFT          19
+#define      MVNETA_RXQ_BUF_SIZE_MASK           (0x1fff << 19)
+#define MVNETA_RXQ_STATUS_REG(q)                (0x14e0 + ((q) << 2))
+#define      MVNETA_RXQ_OCCUPIED_ALL_MASK       0x3fff
+#define MVNETA_RXQ_STATUS_UPDATE_REG(q)         (0x1500 + ((q) << 2))
+#define      MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT  16
+#define      MVNETA_RXQ_ADD_NON_OCCUPIED_MAX    255
+#define MVNETA_PORT_RX_RESET                    0x1cc0
+#define      MVNETA_PORT_RX_DMA_RESET           BIT(0)
+#define MVNETA_PHY_ADDR                         0x2000
+#define      MVNETA_PHY_ADDR_MASK               0x1f
+#define MVNETA_MBUS_RETRY                       0x2010
+#define MVNETA_UNIT_INTR_CAUSE                  0x2080
+#define MVNETA_UNIT_CONTROL                     0x20B0
+#define      MVNETA_PHY_POLLING_ENABLE          BIT(1)
+#define MVNETA_WIN_BASE(w)                      (0x2200 + ((w) << 3))
+#define MVNETA_WIN_SIZE(w)                      (0x2204 + ((w) << 3))
+#define MVNETA_WIN_REMAP(w)                     (0x2280 + ((w) << 2))
+#define MVNETA_BASE_ADDR_ENABLE                 0x2290
+#define MVNETA_PORT_CONFIG                      0x2400
+#define      MVNETA_UNI_PROMISC_MODE            BIT(0)
+#define      MVNETA_DEF_RXQ(q)                  ((q) << 1)
+#define      MVNETA_DEF_RXQ_ARP(q)              ((q) << 4)
+#define      MVNETA_TX_UNSET_ERR_SUM            BIT(12)
+#define      MVNETA_DEF_RXQ_TCP(q)              ((q) << 16)
+#define      MVNETA_DEF_RXQ_UDP(q)              ((q) << 19)
+#define      MVNETA_DEF_RXQ_BPDU(q)             ((q) << 22)
+#define      MVNETA_RX_CSUM_WITH_PSEUDO_HDR     BIT(25)
+#define      MVNETA_PORT_CONFIG_DEFL_VALUE(q)   (MVNETA_DEF_RXQ(q)       | \
+						 MVNETA_DEF_RXQ_ARP(q)	 | \
+						 MVNETA_DEF_RXQ_TCP(q)	 | \
+						 MVNETA_DEF_RXQ_UDP(q)	 | \
+						 MVNETA_DEF_RXQ_BPDU(q)	 | \
+						 MVNETA_TX_UNSET_ERR_SUM | \
+						 MVNETA_RX_CSUM_WITH_PSEUDO_HDR)
+#define MVNETA_PORT_CONFIG_EXTEND                0x2404
+#define MVNETA_MAC_ADDR_LOW                      0x2414
+#define MVNETA_MAC_ADDR_HIGH                     0x2418
+#define MVNETA_SDMA_CONFIG                       0x241c
+#define      MVNETA_SDMA_BRST_SIZE_16            4
+#define      MVNETA_NO_DESC_SWAP                 0x0
+#define      MVNETA_RX_BRST_SZ_MASK(burst)       ((burst) << 1)
+#define      MVNETA_RX_NO_DATA_SWAP              BIT(4)
+#define      MVNETA_TX_NO_DATA_SWAP              BIT(5)
+#define      MVNETA_TX_BRST_SZ_MASK(burst)       ((burst) << 22)
+#define MVNETA_PORT_STATUS                       0x2444
+#define      MVNETA_TX_IN_PRGRS                  BIT(1)
+#define      MVNETA_TX_FIFO_EMPTY                BIT(8)
+#define MVNETA_RX_MIN_FRAME_SIZE                 0x247c
+#define MVNETA_TYPE_PRIO                         0x24bc
+#define      MVNETA_FORCE_UNI                    BIT(21)
+#define MVNETA_TXQ_CMD_1                         0x24e4
+#define MVNETA_TXQ_CMD                           0x2448
+#define      MVNETA_TXQ_DISABLE_SHIFT            8
+#define      MVNETA_TXQ_ENABLE_MASK              0x000000ff
+#define MVNETA_ACC_MODE                          0x2500
+#define MVNETA_CPU_MAP(cpu)                      (0x2540 + ((cpu) << 2))
+#define      MVNETA_CPU_RXQ_ACCESS_ALL_MASK      0x000000ff
+#define      MVNETA_CPU_TXQ_ACCESS_ALL_MASK      0x0000ff00
+#define MVNETA_RXQ_TIME_COAL_REG(q)              (0x2580 + ((q) << 2))
+#define MVNETA_INTR_NEW_CAUSE                    0x25a0
+#define      MVNETA_RX_INTR_MASK(nr_rxqs)        (((1 << nr_rxqs) - 1) << 8)
+#define MVNETA_INTR_NEW_MASK                     0x25a4
+#define MVNETA_INTR_OLD_CAUSE                    0x25a8
+#define MVNETA_INTR_OLD_MASK                     0x25ac
+#define MVNETA_INTR_MISC_CAUSE                   0x25b0
+#define MVNETA_INTR_MISC_MASK                    0x25b4
+#define MVNETA_INTR_ENABLE                       0x25b8
+#define      MVNETA_TXQ_INTR_ENABLE_ALL_MASK     0x0000ff00
+#define      MVNETA_RXQ_INTR_ENABLE_ALL_MASK     0xff000000
+#define MVNETA_RXQ_CMD                           0x2680
+#define      MVNETA_RXQ_DISABLE_SHIFT            8
+#define      MVNETA_RXQ_ENABLE_MASK              0x000000ff
+#define MVETH_TXQ_TOKEN_COUNT_REG(q)             (0x2700 + ((q) << 4))
+#define MVETH_TXQ_TOKEN_CFG_REG(q)               (0x2704 + ((q) << 4))
+#define MVNETA_GMAC_CTRL_0                       0x2c00
+#define      MVNETA_GMAC_MAX_RX_SIZE_SHIFT       2
+#define      MVNETA_GMAC_MAX_RX_SIZE_MASK        0x7ffc
+#define      MVNETA_GMAC0_PORT_ENABLE            BIT(0)
+#define MVNETA_GMAC_CTRL_2                       0x2c08
+#define      MVNETA_GMAC2_PSC_ENABLE             BIT(3)
+#define      MVNETA_GMAC2_PORT_RGMII             BIT(4)
+#define      MVNETA_GMAC2_PORT_RESET             BIT(6)
+#define MVNETA_GMAC_STATUS                       0x2c10
+#define      MVNETA_GMAC_LINK_UP                 BIT(0)
+#define      MVNETA_GMAC_SPEED_1000              BIT(1)
+#define      MVNETA_GMAC_SPEED_100               BIT(2)
+#define      MVNETA_GMAC_FULL_DUPLEX             BIT(3)
+#define      MVNETA_GMAC_RX_FLOW_CTRL_ENABLE     BIT(4)
+#define      MVNETA_GMAC_TX_FLOW_CTRL_ENABLE     BIT(5)
+#define      MVNETA_GMAC_RX_FLOW_CTRL_ACTIVE     BIT(6)
+#define      MVNETA_GMAC_TX_FLOW_CTRL_ACTIVE     BIT(7)
+#define MVNETA_GMAC_AUTONEG_CONFIG               0x2c0c
+#define      MVNETA_GMAC_FORCE_LINK_DOWN         BIT(0)
+#define      MVNETA_GMAC_FORCE_LINK_PASS         BIT(1)
+#define      MVNETA_GMAC_CONFIG_MII_SPEED        BIT(5)
+#define      MVNETA_GMAC_CONFIG_GMII_SPEED       BIT(6)
+#define      MVNETA_GMAC_CONFIG_FULL_DUPLEX      BIT(12)
+#define MVNETA_MIB_COUNTERS_BASE                 0x3080
+#define      MVNETA_MIB_LATE_COLLISION           0x7c
+#define MVNETA_DA_FILT_SPEC_MCAST                0x3400
+#define MVNETA_DA_FILT_OTH_MCAST                 0x3500
+#define MVNETA_DA_FILT_UCAST_BASE                0x3600
+#define MVNETA_TXQ_BASE_ADDR_REG(q)              (0x3c00 + ((q) << 2))
+#define MVNETA_TXQ_SIZE_REG(q)                   (0x3c20 + ((q) << 2))
+#define      MVNETA_TXQ_SENT_THRESH_ALL_MASK     0x3fff0000
+#define      MVNETA_TXQ_SENT_THRESH_MASK(coal)   ((coal) << 16)
+#define MVNETA_TXQ_UPDATE_REG(q)                 (0x3c60 + ((q) << 2))
+#define      MVNETA_TXQ_DEC_SENT_SHIFT           16
+#define MVNETA_TXQ_STATUS_REG(q)                 (0x3c40 + ((q) << 2))
+#define      MVNETA_TXQ_SENT_DESC_SHIFT          16
+#define      MVNETA_TXQ_SENT_DESC_MASK           0x3fff0000
+#define MVNETA_PORT_TX_RESET                     0x3cf0
+#define      MVNETA_PORT_TX_DMA_RESET            BIT(0)
+#define MVNETA_TX_MTU                            0x3e0c
+#define MVNETA_TX_TOKEN_SIZE                     0x3e14
+#define      MVNETA_TX_TOKEN_SIZE_MAX            0xffffffff
+#define MVNETA_TXQ_TOKEN_SIZE_REG(q)             (0x3e40 + ((q) << 2))
+#define      MVNETA_TXQ_TOKEN_SIZE_MAX           0x7fffffff
+
+#define MVNETA_CAUSE_TXQ_SENT_DESC_ALL_MASK	 0xff
+
+/* Descriptor ring Macros */
+#define MVNETA_QUEUE_NEXT_DESC(q, index)	\
+	(((index) < (q)->last_desc) ? ((index) + 1) : 0)
+
+/* Various constants */
+
+/* Coalescing */
+#define MVNETA_TXDONE_COAL_PKTS		16
+#define MVNETA_RX_COAL_PKTS		32
+#define MVNETA_RX_COAL_USEC		100
+
+/* Timer */
+#define MVNETA_TX_DONE_TIMER_PERIOD	10
+
+/* Napi polling weight */
+#define MVNETA_RX_POLL_WEIGHT		64
+
+/* The two bytes Marvell header. Either contains a special value used
+ * by Marvell switches when a specific hardware mode is enabled (not
+ * supported by this driver) or is filled automatically by zeroes on
+ * the RX side. Those two bytes being at the front of the Ethernet
+ * header, they allow to have the IP header aligned on a 4 bytes
+ * boundary automatically: the hardware skips those two bytes on its
+ * own.
+ */
+#define MVNETA_MH_SIZE			2
+
+#define MVNETA_VLAN_TAG_LEN             4
+
+#define MVNETA_CPU_D_CACHE_LINE_SIZE    32
+#define MVNETA_TX_CSUM_MAX_SIZE		9800
+#define MVNETA_ACC_MODE_EXT		1
+
+/* Timeout constants */
+#define MVNETA_TX_DISABLE_TIMEOUT_MSEC	1000
+#define MVNETA_RX_DISABLE_TIMEOUT_MSEC	1000
+#define MVNETA_TX_FIFO_EMPTY_TIMEOUT	10000
+
+#define MVNETA_TX_MTU_MAX		0x3ffff
+
+/* Max number of Rx descriptors */
+#define MVNETA_MAX_RXD 128
+
+/* Max number of Tx descriptors */
+#define MVNETA_MAX_TXD 532
+
+/* descriptor aligned size */
+#define MVNETA_DESC_ALIGNED_SIZE	32
+
+#define MVNETA_RX_PKT_SIZE(mtu) \
+	ALIGN((mtu) + MVNETA_MH_SIZE + MVNETA_VLAN_TAG_LEN + \
+	      ETH_HLEN + ETH_FCS_LEN,			     \
+	      MVNETA_CPU_D_CACHE_LINE_SIZE)
+
+#define MVNETA_RX_BUF_SIZE(pkt_size)   ((pkt_size) + NET_SKB_PAD)
+
+struct mvneta_stats {
+	struct	u64_stats_sync syncp;
+	u64	packets;
+	u64	bytes;
+};
+
+struct mvneta_port {
+	int pkt_size;
+	void __iomem *base;
+	struct mvneta_rx_queue *rxqs;
+	struct mvneta_tx_queue *txqs;
+	struct timer_list tx_done_timer;
+	struct net_device *dev;
+
+	u32 cause_rx_tx;
+	struct napi_struct napi;
+
+	/* Flags */
+	unsigned long flags;
+#define MVNETA_F_TX_DONE_TIMER_BIT  0
+
+	/* Napi weight */
+	int weight;
+
+	/* Core clock */
+	struct clk *clk;
+	u8 mcast_count[256];
+	u16 tx_ring_size;
+	u16 rx_ring_size;
+	struct mvneta_stats tx_stats;
+	struct mvneta_stats rx_stats;
+
+	struct mii_bus *mii_bus;
+	struct phy_device *phy_dev;
+	phy_interface_t phy_interface;
+	struct device_node *phy_node;
+	unsigned int link;
+	unsigned int duplex;
+	unsigned int speed;
+};
+
+/* The mvneta_tx_desc and mvneta_rx_desc structures describe the
+ * layout of the transmit and reception DMA descriptors, and their
+ * layout is therefore defined by the hardware design
+ */
+struct mvneta_tx_desc {
+	u32  command;		/* Options used by HW for packet transmitting.*/
+#define MVNETA_TX_L3_OFF_SHIFT	0
+#define MVNETA_TX_IP_HLEN_SHIFT	8
+#define MVNETA_TX_L4_UDP	BIT(16)
+#define MVNETA_TX_L3_IP6	BIT(17)
+#define MVNETA_TXD_IP_CSUM	BIT(18)
+#define MVNETA_TXD_Z_PAD	BIT(19)
+#define MVNETA_TXD_L_DESC	BIT(20)
+#define MVNETA_TXD_F_DESC	BIT(21)
+#define MVNETA_TXD_FLZ_DESC	(MVNETA_TXD_Z_PAD  | \
+				 MVNETA_TXD_L_DESC | \
+				 MVNETA_TXD_F_DESC)
+#define MVNETA_TX_L4_CSUM_FULL	BIT(30)
+#define MVNETA_TX_L4_CSUM_NOT	BIT(31)
+
+	u16  reserverd1;	/* csum_l4 (for future use)		*/
+	u16  data_size;		/* Data size of transmitted packet in bytes */
+	u32  buf_phys_addr;	/* Physical addr of transmitted buffer	*/
+	u32  reserved2;		/* hw_cmd - (for future use, PMT)	*/
+	u32  reserved3[4];	/* Reserved - (for future use)		*/
+};
+
+struct mvneta_rx_desc {
+	u32  status;		/* Info about received packet		*/
+#define MVNETA_RXD_ERR_CRC		0x0
+#define MVNETA_RXD_ERR_SUMMARY		BIT(16)
+#define MVNETA_RXD_ERR_OVERRUN		BIT(17)
+#define MVNETA_RXD_ERR_LEN		BIT(18)
+#define MVNETA_RXD_ERR_RESOURCE		(BIT(17) | BIT(18))
+#define MVNETA_RXD_ERR_CODE_MASK	(BIT(17) | BIT(18))
+#define MVNETA_RXD_L3_IP4		BIT(25)
+#define MVNETA_RXD_FIRST_LAST_DESC	(BIT(26) | BIT(27))
+#define MVNETA_RXD_L4_CSUM_OK		BIT(30)
+
+	u16  reserved1;		/* pnc_info - (for future use, PnC)	*/
+	u16  data_size;		/* Size of received packet in bytes	*/
+	u32  buf_phys_addr;	/* Physical address of the buffer	*/
+	u32  reserved2;		/* pnc_flow_id  (for future use, PnC)	*/
+	u32  buf_cookie;	/* cookie for access to RX buffer in rx path */
+	u16  reserved3;		/* prefetch_cmd, for future use		*/
+	u16  reserved4;		/* csum_l4 - (for future use, PnC)	*/
+	u32  reserved5;		/* pnc_extra PnC (for future use, PnC)	*/
+	u32  reserved6;		/* hw_cmd (for future use, PnC and HWF)	*/
+};
+
+struct mvneta_tx_queue {
+	/* Number of this TX queue, in the range 0-7 */
+	u8 id;
+
+	/* Number of TX DMA descriptors in the descriptor ring */
+	int size;
+
+	/* Number of currently used TX DMA descriptor in the
+	 * descriptor ring
+	 */
+	int count;
+
+	/* Array of transmitted skb */
+	struct sk_buff **tx_skb;
+
+	/* Index of last TX DMA descriptor that was inserted */
+	int txq_put_index;
+
+	/* Index of the TX DMA descriptor to be cleaned up */
+	int txq_get_index;
+
+	u32 done_pkts_coal;
+
+	/* Virtual address of the TX DMA descriptors array */
+	struct mvneta_tx_desc *descs;
+
+	/* DMA address of the TX DMA descriptors array */
+	dma_addr_t descs_phys;
+
+	/* Index of the last TX DMA descriptor */
+	int last_desc;
+
+	/* Index of the next TX DMA descriptor to process */
+	int next_desc_to_proc;
+};
+
+struct mvneta_rx_queue {
+	/* rx queue number, in the range 0-7 */
+	u8 id;
+
+	/* num of rx descriptors in the rx descriptor ring */
+	int size;
+
+	/* counter of times when mvneta_refill() failed */
+	int missed;
+
+	u32 pkts_coal;
+	u32 time_coal;
+
+	/* Virtual address of the RX DMA descriptors array */
+	struct mvneta_rx_desc *descs;
+
+	/* DMA address of the RX DMA descriptors array */
+	dma_addr_t descs_phys;
+
+	/* Index of the last RX DMA descriptor */
+	int last_desc;
+
+	/* Index of the next RX DMA descriptor to process */
+	int next_desc_to_proc;
+};
+
+static int rxq_number = 8;
+static int txq_number = 8;
+
+static int rxq_def;
+static int txq_def;
+
+#define MVNETA_DRIVER_NAME "mvneta"
+#define MVNETA_DRIVER_VERSION "1.0"
+
+/* Utility/helper methods */
+
+/* Write helper method */
+static void mvreg_write(struct mvneta_port *pp, u32 offset, u32 data)
+{
+	writel(data, pp->base + offset);
+}
+
+/* Read helper method */
+static u32 mvreg_read(struct mvneta_port *pp, u32 offset)
+{
+	return readl(pp->base + offset);
+}
+
+/* Increment txq get counter */
+static void mvneta_txq_inc_get(struct mvneta_tx_queue *txq)
+{
+	txq->txq_get_index++;
+	if (txq->txq_get_index == txq->size)
+		txq->txq_get_index = 0;
+}
+
+/* Increment txq put counter */
+static void mvneta_txq_inc_put(struct mvneta_tx_queue *txq)
+{
+	txq->txq_put_index++;
+	if (txq->txq_put_index == txq->size)
+		txq->txq_put_index = 0;
+}
+
+
+/* Clear all MIB counters */
+static void mvneta_mib_counters_clear(struct mvneta_port *pp)
+{
+	int i;
+	u32 dummy;
+
+	/* Perform dummy reads from MIB counters */
+	for (i = 0; i < MVNETA_MIB_LATE_COLLISION; i += 4)
+		dummy = mvreg_read(pp, (MVNETA_MIB_COUNTERS_BASE + i));
+}
+
+/* Get System Network Statistics */
+struct rtnl_link_stats64 *mvneta_get_stats64(struct net_device *dev,
+					     struct rtnl_link_stats64 *stats)
+{
+	struct mvneta_port *pp = netdev_priv(dev);
+	unsigned int start;
+
+	memset(stats, 0, sizeof(struct rtnl_link_stats64));
+
+	do {
+		start = u64_stats_fetch_begin_bh(&pp->rx_stats.syncp);
+		stats->rx_packets = pp->rx_stats.packets;
+		stats->rx_bytes	= pp->rx_stats.bytes;
+	} while (u64_stats_fetch_retry_bh(&pp->rx_stats.syncp, start));
+
+
+	do {
+		start = u64_stats_fetch_begin_bh(&pp->tx_stats.syncp);
+		stats->tx_packets = pp->tx_stats.packets;
+		stats->tx_bytes	= pp->tx_stats.bytes;
+	} while (u64_stats_fetch_retry_bh(&pp->tx_stats.syncp, start));
+
+	stats->rx_errors	= dev->stats.rx_errors;
+	stats->rx_dropped	= dev->stats.rx_dropped;
+
+	stats->tx_dropped	= dev->stats.tx_dropped;
+
+	return stats;
+}
+
+/* Rx descriptors helper methods */
+
+/* Checks whether the given RX descriptor is both the first and the
+ * last descriptor for the RX packet. Each RX packet is currently
+ * received through a single RX descriptor, so not having each RX
+ * descriptor with its first and last bits set is an error
+ */
+static int mvneta_rxq_desc_is_first_last(struct mvneta_rx_desc *desc)
+{
+	return (desc->status & MVNETA_RXD_FIRST_LAST_DESC) ==
+		MVNETA_RXD_FIRST_LAST_DESC;
+}
+
+/* Add number of descriptors ready to receive new packets */
+static void mvneta_rxq_non_occup_desc_add(struct mvneta_port *pp,
+					  struct mvneta_rx_queue *rxq,
+					  int ndescs)
+{
+	/* Only MVNETA_RXQ_ADD_NON_OCCUPIED_MAX (255) descriptors can
+	 * be added at once
+	 */
+	while (ndescs > MVNETA_RXQ_ADD_NON_OCCUPIED_MAX) {
+		mvreg_write(pp, MVNETA_RXQ_STATUS_UPDATE_REG(rxq->id),
+			    (MVNETA_RXQ_ADD_NON_OCCUPIED_MAX <<
+			     MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT));
+		ndescs -= MVNETA_RXQ_ADD_NON_OCCUPIED_MAX;
+	}
+
+	mvreg_write(pp, MVNETA_RXQ_STATUS_UPDATE_REG(rxq->id),
+		    (ndescs << MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT));
+}
+
+/* Get number of RX descriptors occupied by received packets */
+static int mvneta_rxq_busy_desc_num_get(struct mvneta_port *pp,
+					struct mvneta_rx_queue *rxq)
+{
+	u32 val;
+
+	val = mvreg_read(pp, MVNETA_RXQ_STATUS_REG(rxq->id));
+	return val & MVNETA_RXQ_OCCUPIED_ALL_MASK;
+}
+
+/* Update num of rx desc called upon return from rx path or
+ * from mvneta_rxq_drop_pkts().
+ */
+static void mvneta_rxq_desc_num_update(struct mvneta_port *pp,
+				       struct mvneta_rx_queue *rxq,
+				       int rx_done, int rx_filled)
+{
+	u32 val;
+
+	if ((rx_done <= 0xff) && (rx_filled <= 0xff)) {
+		val = rx_done |
+		  (rx_filled << MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT);
+		mvreg_write(pp, MVNETA_RXQ_STATUS_UPDATE_REG(rxq->id), val);
+		return;
+	}
+
+	/* Only 255 descriptors can be added at once */
+	while ((rx_done > 0) || (rx_filled > 0)) {
+		if (rx_done <= 0xff) {
+			val = rx_done;
+			rx_done = 0;
+		} else {
+			val = 0xff;
+			rx_done -= 0xff;
+		}
+		if (rx_filled <= 0xff) {
+			val |= rx_filled << MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT;
+			rx_filled = 0;
+		} else {
+			val |= 0xff << MVNETA_RXQ_ADD_NON_OCCUPIED_SHIFT;
+			rx_filled -= 0xff;
+		}
+		mvreg_write(pp, MVNETA_RXQ_STATUS_UPDATE_REG(rxq->id), val);
+	}
+}
+
+/* Get pointer to next RX descriptor to be processed by SW */
+static struct mvneta_rx_desc *
+mvneta_rxq_next_desc_get(struct mvneta_rx_queue *rxq)
+{
+	int rx_desc = rxq->next_desc_to_proc;
+
+	rxq->next_desc_to_proc = MVNETA_QUEUE_NEXT_DESC(rxq, rx_desc);
+	return rxq->descs + rx_desc;
+}
+
+/* Change maximum receive size of the port. */
+static void mvneta_max_rx_size_set(struct mvneta_port *pp, int max_rx_size)
+{
+	u32 val;
+
+	val =  mvreg_read(pp, MVNETA_GMAC_CTRL_0);
+	val &= ~MVNETA_GMAC_MAX_RX_SIZE_MASK;
+	val |= ((max_rx_size - MVNETA_MH_SIZE) / 2) <<
+		MVNETA_GMAC_MAX_RX_SIZE_SHIFT;
+	mvreg_write(pp, MVNETA_GMAC_CTRL_0, val);
+}
+
+
+/* Set rx queue offset */
+static void mvneta_rxq_offset_set(struct mvneta_port *pp,
+				  struct mvneta_rx_queue *rxq,
+				  int offset)
+{
+	u32 val;
+
+	val = mvreg_read(pp, MVNETA_RXQ_CONFIG_REG(rxq->id));
+	val &= ~MVNETA_RXQ_PKT_OFFSET_ALL_MASK;
+
+	/* Offset is in */
+	val |= MVNETA_RXQ_PKT_OFFSET_MASK(offset >> 3);
+	mvreg_write(pp, MVNETA_RXQ_CONFIG_REG(rxq->id), val);
+}
+
+
+/* Tx descriptors helper methods */
+
+/* Update HW with number of TX descriptors to be sent */
+static void mvneta_txq_pend_desc_add(struct mvneta_port *pp,
+				     struct mvneta_tx_queue *txq,
+				     int pend_desc)
+{
+	u32 val;
+
+	/* Only 255 descriptors can be added at once ; Assume caller
+	 * process TX desriptors in quanta less than 256
+	 */
+	val = pend_desc;
+	mvreg_write(pp, MVNETA_TXQ_UPDATE_REG(txq->id), val);
+}
+
+/* Get pointer to next TX descriptor to be processed (send) by HW */
+static struct mvneta_tx_desc *
+mvneta_txq_next_desc_get(struct mvneta_tx_queue *txq)
+{
+	int tx_desc = txq->next_desc_to_proc;
+
+	txq->next_desc_to_proc = MVNETA_QUEUE_NEXT_DESC(txq, tx_desc);
+	return txq->descs + tx_desc;
+}
+
+/* Release the last allocated TX descriptor. Useful to handle DMA
+ * mapping failures in the TX path.
+ */
+static void mvneta_txq_desc_put(struct mvneta_tx_queue *txq)
+{
+	if (txq->next_desc_to_proc == 0)
+		txq->next_desc_to_proc = txq->last_desc - 1;
+	else
+		txq->next_desc_to_proc--;
+}
+
+/* Set rxq buf size */
+static void mvneta_rxq_buf_size_set(struct mvneta_port *pp,
+				    struct mvneta_rx_queue *rxq,
+				    int buf_size)
+{
+	u32 val;
+
+	val = mvreg_read(pp, MVNETA_RXQ_SIZE_REG(rxq->id));
+
+	val &= ~MVNETA_RXQ_BUF_SIZE_MASK;
+	val |= ((buf_size >> 3) << MVNETA_RXQ_BUF_SIZE_SHIFT);
+
+	mvreg_write(pp, MVNETA_RXQ_SIZE_REG(rxq->id), val);
+}
+
+/* Disable buffer management (BM) */
+static void mvneta_rxq_bm_disable(struct mvneta_port *pp,
+				  struct mvneta_rx_queue *rxq)
+{
+	u32 val;
+
+	val = mvreg_read(pp, MVNETA_RXQ_CONFIG_REG(rxq->id));
+	val &= ~MVNETA_RXQ_HW_BUF_ALLOC;
+	mvreg_write(pp, MVNETA_RXQ_CONFIG_REG(rxq->id), val);
+}
+
+
+
+/* Sets the RGMII Enable bit (RGMIIEn) in port MAC control register */
+static void __devinit mvneta_gmac_rgmii_set(struct mvneta_port *pp, int enable)
+{
+	u32  val;
+
+	val = mvreg_read(pp, MVNETA_GMAC_CTRL_2);
+
+	if (enable)
+		val |= MVNETA_GMAC2_PORT_RGMII;
+	else
+		val &= ~MVNETA_GMAC2_PORT_RGMII;
+
+	mvreg_write(pp, MVNETA_GMAC_CTRL_2, val);
+}
+
+/* Config SGMII port */
+static void __devinit mvneta_port_sgmii_config(struct mvneta_port *pp)
+{
+	u32 val;
+
+	val = mvreg_read(pp, MVNETA_GMAC_CTRL_2);
+	val |= MVNETA_GMAC2_PSC_ENABLE;
+	mvreg_write(pp, MVNETA_GMAC_CTRL_2, val);
+}
+
+/* Start the Ethernet port RX and TX activity */
+static void mvneta_port_up(struct mvneta_port *pp)
+{
+	int queue;
+	u32 q_map;
+
+	/* Enable all initialized TXs. */
+	mvneta_mib_counters_clear(pp);
+	q_map = 0;
+	for (queue = 0; queue < txq_number; queue++) {
+		struct mvneta_tx_queue *txq = &pp->txqs[queue];
+		if (txq->descs != NULL)
+			q_map |= (1 << queue);
+	}
+	mvreg_write(pp, MVNETA_TXQ_CMD, q_map);
+
+	/* Enable all initialized RXQs. */
+	q_map = 0;
+	for (queue = 0; queue < rxq_number; queue++) {
+		struct mvneta_rx_queue *rxq = &pp->rxqs[queue];
+		if (rxq->descs != NULL)
+			q_map |= (1 << queue);
+	}
+
+	mvreg_write(pp, MVNETA_RXQ_CMD, q_map);
+}
+
+/* Stop the Ethernet port activity */
+static void mvneta_port_down(struct mvneta_port *pp)
+{
+	u32 val;
+	int count;
+
+	/* Stop Rx port activity. Check port Rx activity. */
+	val = mvreg_read(pp, MVNETA_RXQ_CMD) & MVNETA_RXQ_ENABLE_MASK;
+
+	/* Issue stop command for active channels only */
+	if (val != 0)
+		mvreg_write(pp, MVNETA_RXQ_CMD,
+			    val << MVNETA_RXQ_DISABLE_SHIFT);
+
+	/* Wait for all Rx activity to terminate. */
+	count = 0;
+	do {
+		if (count++ >= MVNETA_RX_DISABLE_TIMEOUT_MSEC) {
+			netdev_warn(pp->dev,
+				    "TIMEOUT for RX stopped ! rx_queue_cmd: 0x08%x\n",
+				    val);
+			break;
+		}
+		mdelay(1);
+
+		val = mvreg_read(pp, MVNETA_RXQ_CMD);
+	} while (val & 0xff);
+
+	/* Stop Tx port activity. Check port Tx activity. Issue stop
+	 * command for active channels only
+	 */
+	val = (mvreg_read(pp, MVNETA_TXQ_CMD)) & MVNETA_TXQ_ENABLE_MASK;
+
+	if (val != 0)
+		mvreg_write(pp, MVNETA_TXQ_CMD,
+			    (val << MVNETA_TXQ_DISABLE_SHIFT));
+
+	/* Wait for all Tx activity to terminate. */
+	count = 0;
+	do {
+		if (count++ >= MVNETA_TX_DISABLE_TIMEOUT_MSEC) {
+			netdev_warn(pp->dev,
+				    "TIMEOUT for TX stopped