Merge branch 'amd-xgbe'

Tom Lendacky says:

====================
amd-xgbe: AMD XGBE driver updates 2015-01-16

The following series of patches includes functional updates to the
driver as well as some trivial changes.

- Fix checks/warnings from checkpatch in the amd-xgbe driver
- Fix checks/warnings from checkpatch in the amd-xgbe-phy driver
- Add a check to be sure that the amd-xgbe driver is using the
  amd-xgbe-phy driver
- Use a saved control register value when bringing the PCS out of
  suspend
- Clear all device state during a device restart
- Simplify the Rx descriptor ring tracking
- Remove the need for Tx path spinlocks
- Update the auto-negotiation logic to make use of the auto-negotiation
  interrupt
- Properly support/advertise the FEC capability of the device
- Use the proper page registers during auto-negotiation extended next
  page exchange
- Add ACPI support to the amd-xgbe and amd-xgbe-phy drivers
- Allow platform specific phy settings to be supplied by UEFI

This patch series is based on net-next.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/amd-xgbe-phy.txt

@@ -7,17 +7,38 @@ Required properties:
    - SerDes Rx/Tx registers
    - SerDes integration registers (1/2)
    - SerDes integration registers (2/2)
+- interrupt-parent: Should be the phandle for the interrupt controller
+  that services interrupts for this device
+- interrupts: Should contain the amd-xgbe-phy interrupt.
 
 Optional properties:
 - amd,speed-set: Speed capabilities of the device
     0 - 1GbE and 10GbE (default)
     1 - 2.5GbE and 10GbE
 
+The following optional properties are represented by an array with each
+value corresponding to a particular speed. The first array value represents
+the setting for the 1GbE speed, the second value for the 2.5GbE speed and
+the third value for the 10GbE speed.  All three values are required if the
+property is used.
+- amd,serdes-blwc: Baseline wandering correction enablement
+    0 - Off
+    1 - On
+- amd,serdes-cdr-rate: CDR rate speed selection
+- amd,serdes-pq-skew: PQ (data sampling) skew
+- amd,serdes-tx-amp: TX amplitude boost
+
 Example:
 	xgbe_phy@e1240800 {
 		compatible = "amd,xgbe-phy-seattle-v1a", "ethernet-phy-ieee802.3-c45";
 		reg = <0 0xe1240800 0 0x00400>,
 		      <0 0xe1250000 0 0x00060>,
 		      <0 0xe1250080 0 0x00004>;
+		interrupt-parent = <&gic>;
+		interrupts = <0 323 4>;
 		amd,speed-set = <0>;
+		amd,serdes-blwc = <1>, <1>, <0>;
+		amd,serdes-cdr-rate = <2>, <2>, <7>;
+		amd,serdes-pq-skew = <10>, <10>, <30>;
+		amd,serdes-tx-amp = <15>, <15>, <10>;
 	};

drivers/net/ethernet/amd/Kconfig

@@ -179,7 +179,7 @@ config SUNLANCE
 
 config AMD_XGBE
 	tristate "AMD 10GbE Ethernet driver"
-	depends on OF_NET && HAS_IOMEM
+	depends on (OF_NET || ACPI) && HAS_IOMEM
 	select PHYLIB
 	select AMD_XGBE_PHY
 	select BITREVERSE

drivers/net/ethernet/amd/xgbe/xgbe-debugfs.c

@@ -328,7 +328,7 @@ void xgbe_debugfs_init(struct xgbe_prv_data *pdata)
 
 	buf = kasprintf(GFP_KERNEL, "amd-xgbe-%s", pdata->netdev->name);
 	pdata->xgbe_debugfs = debugfs_create_dir(buf, NULL);
-	if (pdata->xgbe_debugfs == NULL) {
+	if (!pdata->xgbe_debugfs) {
 		netdev_err(pdata->netdev, "debugfs_create_dir failed\n");
 		return;
 	}

drivers/net/ethernet/amd/xgbe/xgbe-desc.c

@@ -422,7 +422,6 @@ static void xgbe_wrapper_rx_descriptor_init(struct xgbe_prv_data *pdata)
 
 		ring->cur = 0;
 		ring->dirty = 0;
-		memset(&ring->rx, 0, sizeof(ring->rx));
 
 		hw_if->rx_desc_init(channel);
 	}
@@ -621,35 +620,6 @@ static int xgbe_map_tx_skb(struct xgbe_channel *channel, struct sk_buff *skb)
 	return 0;
 }
 
-static void xgbe_realloc_rx_buffer(struct xgbe_channel *channel)
-{
-	struct xgbe_prv_data *pdata = channel->pdata;
-	struct xgbe_hw_if *hw_if = &pdata->hw_if;
-	struct xgbe_ring *ring = channel->rx_ring;
-	struct xgbe_ring_data *rdata;
-	int i;
-
-	DBGPR("-->xgbe_realloc_rx_buffer: rx_ring->rx.realloc_index = %u\n",
-	      ring->rx.realloc_index);
-
-	for (i = 0; i < ring->dirty; i++) {
-		rdata = XGBE_GET_DESC_DATA(ring, ring->rx.realloc_index);
-
-		/* Reset rdata values */
-		xgbe_unmap_rdata(pdata, rdata);
-
-		if (xgbe_map_rx_buffer(pdata, ring, rdata))
-			break;
-
-		hw_if->rx_desc_reset(rdata);
-
-		ring->rx.realloc_index++;
-	}
-	ring->dirty = 0;
-
-	DBGPR("<--xgbe_realloc_rx_buffer\n");
-}
-
 void xgbe_init_function_ptrs_desc(struct xgbe_desc_if *desc_if)
 {
 	DBGPR("-->xgbe_init_function_ptrs_desc\n");
@@ -657,7 +627,7 @@ void xgbe_init_function_ptrs_desc(struct xgbe_desc_if *desc_if)
 	desc_if->alloc_ring_resources = xgbe_alloc_ring_resources;
 	desc_if->free_ring_resources = xgbe_free_ring_resources;
 	desc_if->map_tx_skb = xgbe_map_tx_skb;
-	desc_if->realloc_rx_buffer = xgbe_realloc_rx_buffer;
+	desc_if->map_rx_buffer = xgbe_map_rx_buffer;
 	desc_if->unmap_rdata = xgbe_unmap_rdata;
 	desc_if->wrapper_tx_desc_init = xgbe_wrapper_tx_descriptor_init;
 	desc_if->wrapper_rx_desc_init = xgbe_wrapper_rx_descriptor_init;

drivers/net/ethernet/amd/xgbe/xgbe-dev.c

@@ -115,6 +115,7 @@
  */
 
 #include <linux/phy.h>
+#include <linux/mdio.h>
 #include <linux/clk.h>
 #include <linux/bitrev.h>
 #include <linux/crc32.h>
@@ -130,7 +131,7 @@ static unsigned int xgbe_usec_to_riwt(struct xgbe_prv_data *pdata,
 
 	DBGPR("-->xgbe_usec_to_riwt\n");
 
-	rate = clk_get_rate(pdata->sysclk);
+	rate = pdata->sysclk_rate;
 
 	/*
 	 * Convert the input usec value to the watchdog timer value. Each
@@ -153,7 +154,7 @@ static unsigned int xgbe_riwt_to_usec(struct xgbe_prv_data *pdata,
 
 	DBGPR("-->xgbe_riwt_to_usec\n");
 
-	rate = clk_get_rate(pdata->sysclk);
+	rate = pdata->sysclk_rate;
 
 	/*
 	 * Convert the input watchdog timer value to the usec value. Each
@@ -673,6 +674,9 @@ static void xgbe_enable_mac_interrupts(struct xgbe_prv_data *pdata)
 
 static int xgbe_set_gmii_speed(struct xgbe_prv_data *pdata)
 {
+	if (XGMAC_IOREAD_BITS(pdata, MAC_TCR, SS) == 0x3)
+		return 0;
+
 	XGMAC_IOWRITE_BITS(pdata, MAC_TCR, SS, 0x3);
 
 	return 0;
@@ -680,6 +684,9 @@ static int xgbe_set_gmii_speed(struct xgbe_prv_data *pdata)
 
 static int xgbe_set_gmii_2500_speed(struct xgbe_prv_data *pdata)
 {
+	if (XGMAC_IOREAD_BITS(pdata, MAC_TCR, SS) == 0x2)
+		return 0;
+
 	XGMAC_IOWRITE_BITS(pdata, MAC_TCR, SS, 0x2);
 
 	return 0;
@@ -687,6 +694,9 @@ static int xgbe_set_gmii_2500_speed(struct xgbe_prv_data *pdata)
 
 static int xgbe_set_xgmii_speed(struct xgbe_prv_data *pdata)
 {
+	if (XGMAC_IOREAD_BITS(pdata, MAC_TCR, SS) == 0)
+		return 0;
+
 	XGMAC_IOWRITE_BITS(pdata, MAC_TCR, SS, 0);
 
 	return 0;
@@ -881,6 +891,23 @@ static void xgbe_write_mmd_regs(struct xgbe_prv_data *pdata, int prtad,
 	else
 		mmd_address = (pdata->mdio_mmd << 16) | (mmd_reg & 0xffff);
 
+	/* If the PCS is changing modes, match the MAC speed to it */
+	if (((mmd_address >> 16) == MDIO_MMD_PCS) &&
+	    ((mmd_address & 0xffff) == MDIO_CTRL2)) {
+		struct phy_device *phydev = pdata->phydev;
+
+		if (mmd_data & MDIO_PCS_CTRL2_TYPE) {
+			/* KX mode */
+			if (phydev->supported & SUPPORTED_1000baseKX_Full)
+				xgbe_set_gmii_speed(pdata);
+			else
+				xgbe_set_gmii_2500_speed(pdata);
+		} else {
+			/* KR mode */
+			xgbe_set_xgmii_speed(pdata);
+		}
+	}
+
 	/* The PCS registers are accessed using mmio. The underlying APB3
 	 * management interface uses indirect addressing to access the MMD
 	 * register sets. This requires accessing of the PCS register in two
@@ -1359,6 +1386,7 @@ static void xgbe_dev_xmit(struct xgbe_channel *channel)
 	unsigned int tso_context, vlan_context;
 	unsigned int tx_set_ic;
 	int start_index = ring->cur;
+	int cur_index = ring->cur;
 	int i;
 
 	DBGPR("-->xgbe_dev_xmit\n");
@@ -1401,7 +1429,7 @@ static void xgbe_dev_xmit(struct xgbe_channel *channel)
 	else
 		tx_set_ic = 0;
 
-	rdata = XGBE_GET_DESC_DATA(ring, ring->cur);
+	rdata = XGBE_GET_DESC_DATA(ring, cur_index);
 	rdesc = rdata->rdesc;
 
 	/* Create a context descriptor if this is a TSO packet */
@@ -1444,8 +1472,8 @@ static void xgbe_dev_xmit(struct xgbe_channel *channel)
 			ring->tx.cur_vlan_ctag = packet->vlan_ctag;
 		}
 
-		ring->cur++;
-		rdata = XGBE_GET_DESC_DATA(ring, ring->cur);
+		cur_index++;
+		rdata = XGBE_GET_DESC_DATA(ring, cur_index);
 		rdesc = rdata->rdesc;
 	}
 
@@ -1473,7 +1501,7 @@ static void xgbe_dev_xmit(struct xgbe_channel *channel)
 	XGMAC_SET_BITS_LE(rdesc->desc3, TX_NORMAL_DESC3, CTXT, 0);
 
 	/* Set OWN bit if not the first descriptor */
-	if (ring->cur != start_index)
+	if (cur_index != start_index)
 		XGMAC_SET_BITS_LE(rdesc->desc3, TX_NORMAL_DESC3, OWN, 1);
 
 	if (tso) {
@@ -1497,9 +1525,9 @@ static void xgbe_dev_xmit(struct xgbe_channel *channel)
 				  packet->length);
 	}
 
-	for (i = ring->cur - start_index + 1; i < packet->rdesc_count; i++) {
-		ring->cur++;
-		rdata = XGBE_GET_DESC_DATA(ring, ring->cur);
+	for (i = cur_index - start_index + 1; i < packet->rdesc_count; i++) {
+		cur_index++;
+		rdata = XGBE_GET_DESC_DATA(ring, cur_index);
 		rdesc = rdata->rdesc;
 
 		/* Update buffer address */
@@ -1551,7 +1579,7 @@ static void xgbe_dev_xmit(struct xgbe_channel *channel)
 	/* Make sure ownership is written to the descriptor */
 	wmb();
 
-	ring->cur++;
+	ring->cur = cur_index + 1;
 	if (!packet->skb->xmit_more ||
 	    netif_xmit_stopped(netdev_get_tx_queue(pdata->netdev,
 						   channel->queue_index)))
@@ -2107,6 +2135,23 @@ static void xgbe_config_jumbo_enable(struct xgbe_prv_data *pdata)
 	XGMAC_IOWRITE_BITS(pdata, MAC_RCR, JE, val);
 }
 
+static void xgbe_config_mac_speed(struct xgbe_prv_data *pdata)
+{
+	switch (pdata->phy_speed) {
+	case SPEED_10000:
+		xgbe_set_xgmii_speed(pdata);
+		break;
+
+	case SPEED_2500:
+		xgbe_set_gmii_2500_speed(pdata);
+		break;
+
+	case SPEED_1000:
+		xgbe_set_gmii_speed(pdata);
+		break;
+	}
+}
+
 static void xgbe_config_checksum_offload(struct xgbe_prv_data *pdata)
 {
 	if (pdata->netdev->features & NETIF_F_RXCSUM)
@@ -2757,6 +2802,7 @@ static int xgbe_init(struct xgbe_prv_data *pdata)
 	xgbe_config_mac_address(pdata);
 	xgbe_config_jumbo_enable(pdata);
 	xgbe_config_flow_control(pdata);
+	xgbe_config_mac_speed(pdata);
 	xgbe_config_checksum_offload(pdata);
 	xgbe_config_vlan_support(pdata);
 	xgbe_config_mmc(pdata);

drivers/net/ethernet/amd/xgbe/xgbe-drv.c

@@ -225,6 +225,11 @@ static inline unsigned int xgbe_tx_avail_desc(struct xgbe_ring *ring)
 	return (ring->rdesc_count - (ring->cur - ring->dirty));
 }
 
+static inline unsigned int xgbe_rx_dirty_desc(struct xgbe_ring *ring)
+{
+	return (ring->cur - ring->dirty);
+}
+
 static int xgbe_maybe_stop_tx_queue(struct xgbe_channel *channel,
 				    struct xgbe_ring *ring, unsigned int count)
 {
@@ -410,17 +415,13 @@ static enum hrtimer_restart xgbe_tx_timer(struct hrtimer *timer)
 	struct xgbe_channel *channel = container_of(timer,
 						    struct xgbe_channel,
 						    tx_timer);
-	struct xgbe_ring *ring = channel->tx_ring;
 	struct xgbe_prv_data *pdata = channel->pdata;
 	struct napi_struct *napi;
-	unsigned long flags;
 
 	DBGPR("-->xgbe_tx_timer\n");
 
 	napi = (pdata->per_channel_irq) ? &channel->napi : &pdata->napi;
 
-	spin_lock_irqsave(&ring->lock, flags);
-
 	if (napi_schedule_prep(napi)) {
 		/* Disable Tx and Rx interrupts */
 		if (pdata->per_channel_irq)
@@ -434,8 +435,6 @@ static enum hrtimer_restart xgbe_tx_timer(struct hrtimer *timer)
 
 	channel->tx_timer_active = 0;
 
-	spin_unlock_irqrestore(&ring->lock, flags);
-
 	DBGPR("<--xgbe_tx_timer\n");
 
 	return HRTIMER_NORESTART;
@@ -692,7 +691,7 @@ static void xgbe_adjust_link(struct net_device *netdev)
 	struct phy_device *phydev = pdata->phydev;
 	int new_state = 0;
 
-	if (phydev == NULL)
+	if (!phydev)
 		return;
 
 	if (phydev->link) {
@@ -927,7 +926,7 @@ static void xgbe_stop(struct xgbe_prv_data *pdata)
 	DBGPR("<--xgbe_stop\n");
 }
 
-static void xgbe_restart_dev(struct xgbe_prv_data *pdata, unsigned int reset)
+static void xgbe_restart_dev(struct xgbe_prv_data *pdata)
 {
 	struct xgbe_channel *channel;
 	struct xgbe_hw_if *hw_if = &pdata->hw_if;
@@ -950,8 +949,7 @@ static void xgbe_restart_dev(struct xgbe_prv_data *pdata, unsigned int reset)
 	xgbe_free_tx_data(pdata);
 	xgbe_free_rx_data(pdata);
 
-	/* Issue software reset to device if requested */
-	if (reset)
+	/* Issue software reset to device */
 	hw_if->exit(pdata);
 
 	xgbe_start(pdata);
@@ -967,7 +965,7 @@ static void xgbe_restart(struct work_struct *work)
 
 	rtnl_lock();
 
-	xgbe_restart_dev(pdata, 1);
+	xgbe_restart_dev(pdata);
 
 	rtnl_unlock();
 }
@@ -1446,7 +1444,6 @@ static int xgbe_xmit(struct sk_buff *skb, struct net_device *netdev)
 	struct xgbe_ring *ring;
 	struct xgbe_packet_data *packet;
 	struct netdev_queue *txq;
-	unsigned long flags;
 	int ret;
 
 	DBGPR("-->xgbe_xmit: skb->len = %d\n", skb->len);
@@ -1458,8 +1455,6 @@ static int xgbe_xmit(struct sk_buff *skb, struct net_device *netdev)
 
 	ret = NETDEV_TX_OK;
 
-	spin_lock_irqsave(&ring->lock, flags);
-
 	if (skb->len == 0) {
 		netdev_err(netdev, "empty skb received from stack\n");
 		dev_kfree_skb_any(skb);
@@ -1506,10 +1501,6 @@ static int xgbe_xmit(struct sk_buff *skb, struct net_device *netdev)
 	ret = NETDEV_TX_OK;
 
 tx_netdev_return:
-	spin_unlock_irqrestore(&ring->lock, flags);
-
-	DBGPR("<--xgbe_xmit\n");
-
 	return ret;
 }
 
@@ -1587,7 +1578,7 @@ static int xgbe_change_mtu(struct net_device *netdev, int mtu)
 	pdata->rx_buf_size = ret;
 	netdev->mtu = mtu;
 
-	xgbe_restart_dev(pdata, 0);
+	xgbe_restart_dev(pdata);
 
 	DBGPR("<--xgbe_change_mtu\n");
 
@@ -1776,15 +1767,28 @@ struct net_device_ops *xgbe_get_netdev_ops(void)
 static void xgbe_rx_refresh(struct xgbe_channel *channel)
 {
 	struct xgbe_prv_data *pdata = channel->pdata;
+	struct xgbe_hw_if *hw_if = &pdata->hw_if;
 	struct xgbe_desc_if *desc_if = &pdata->desc_if;
 	struct xgbe_ring *ring = channel->rx_ring;
 	struct xgbe_ring_data *rdata;
 
-	desc_if->realloc_rx_buffer(channel);
+	while (ring->dirty != ring->cur) {
+		rdata = XGBE_GET_DESC_DATA(ring, ring->dirty);
+
+		/* Reset rdata values */
+		desc_if->unmap_rdata(pdata, rdata);
+
+		if (desc_if->map_rx_buffer(pdata, ring, rdata))
+			break;
+
+		hw_if->rx_desc_reset(rdata);
+
+		ring->dirty++;
+	}
 
 	/* Update the Rx Tail Pointer Register with address of
 	 * the last cleaned entry */
-	rdata = XGBE_GET_DESC_DATA(ring, ring->rx.realloc_index - 1);
+	rdata = XGBE_GET_DESC_DATA(ring, ring->dirty - 1);
 	XGMAC_DMA_IOWRITE(channel, DMA_CH_RDTR_LO,
 			  lower_32_bits(rdata->rdesc_dma));
 }
@@ -1824,7 +1828,6 @@ static int xgbe_tx_poll(struct xgbe_channel *channel)
 	struct xgbe_ring_desc *rdesc;
 	struct net_device *netdev = pdata->netdev;
 	struct netdev_queue *txq;
-	unsigned long flags;
 	int processed = 0;
 	unsigned int tx_packets = 0, tx_bytes = 0;
 
@@ -1836,8 +1839,6 @@ static int xgbe_tx_poll(struct xgbe_channel *channel)
 
 	txq = netdev_get_tx_queue(netdev, channel->queue_index);
 
-	spin_lock_irqsave(&ring->lock, flags);
-
 	while ((processed < XGBE_TX_DESC_MAX_PROC) &&
 	       (ring->dirty != ring->cur)) {
 		rdata = XGBE_GET_DESC_DATA(ring, ring->dirty);
@@ -1868,7 +1869,7 @@ static int xgbe_tx_poll(struct xgbe_channel *channel)
 	}
 
 	if (!processed)
-		goto unlock;
+		return 0;
 
 	netdev_tx_completed_queue(txq, tx_packets, tx_bytes);
 
@@ -1880,9 +1881,6 @@ static int xgbe_tx_poll(struct xgbe_channel *channel)
 
 	DBGPR("<--xgbe_tx_poll: processed=%d\n", processed);
 
-unlock:
-	spin_unlock_irqrestore(&ring->lock, flags);
-
 	return processed;
 }
 
@@ -1934,7 +1932,7 @@ static int xgbe_rx_poll(struct xgbe_channel *channel, int budget)
 read_again:
 		rdata = XGBE_GET_DESC_DATA(ring, ring->cur);
 
-		if (ring->dirty > (XGBE_RX_DESC_CNT >> 3))
+		if (xgbe_rx_dirty_desc(ring) > (XGBE_RX_DESC_CNT >> 3))
 			xgbe_rx_refresh(channel);
 
 		if (hw_if->dev_read(channel))
@@ -1942,7 +1940,6 @@ static int xgbe_rx_poll(struct xgbe_channel *channel, int budget)
 
 		received++;
 		ring->cur++;
-		ring->dirty++;
 
 		incomplete = XGMAC_GET_BITS(packet->attributes,
 					    RX_PACKET_ATTRIBUTES,

drivers/net/ethernet/amd/xgbe/xgbe-main.c

@@ -123,7 +123,10 @@
 #include <linux/io.h>
 #include <linux/of.h>
 #include <linux/of_net.h>
+#include <linux/of_address.h>
 #include <linux/clk.h>
+#include <linux/property.h>
+#include <linux/acpi.h>
 
 #include "xgbe.h"
 #include "xgbe-common.h"
@@ -148,6 +151,7 @@ static void xgbe_default_config(struct xgbe_prv_data *pdata)
 	pdata->pause_autoneg = 1;
 	pdata->tx_pause = 1;
 	pdata->rx_pause = 1;
+	pdata->phy_speed = SPEED_UNKNOWN;
 	pdata->power_down = 0;
 	pdata->default_autoneg = AUTONEG_ENABLE;
 	pdata->default_speed = SPEED_10000;
@@ -161,6 +165,96 @@ static void xgbe_init_all_fptrs(struct xgbe_prv_data *pdata)
 	xgbe_init_function_ptrs_desc(&pdata->desc_if);
 }
 
+#ifdef CONFIG_ACPI
+static int xgbe_acpi_support(struct xgbe_prv_data *pdata)
+{
+	struct acpi_device *adev = pdata->adev;
+	struct device *dev = pdata->dev;
+	u32 property;
+	acpi_handle handle;
+	acpi_status status;
+	unsigned long long data;
+	int cca;
+	int ret;
+
+	/* Obtain the system clock setting */
+	ret = device_property_read_u32(dev, XGBE_ACPI_DMA_FREQ, &property);
+	if (ret) {
+		dev_err(dev, "unable to obtain %s property\n",
+			XGBE_ACPI_DMA_FREQ);
+		return ret;
+	}
+	pdata->sysclk_rate = property;
+
+	/* Obtain the PTP clock setting */
+	ret = device_property_read_u32(dev, XGBE_ACPI_PTP_FREQ, &property);
+	if (ret) {
+		dev_err(dev, "unable to obtain %s property\n",
+			XGBE_ACPI_PTP_FREQ);
+		return ret;
+	}
+	pdata->ptpclk_rate = property;
+
+	/* Retrieve the device cache coherency value */
+	handle = adev->handle;
+	do {
+		status = acpi_evaluate_integer(handle, "_CCA", NULL, &data);
+		if (!ACPI_FAILURE(status)) {
+			cca = data;
+			break;
+		}
+
+		status = acpi_get_parent(handle, &handle);
+	} while (!ACPI_FAILURE(status));
+
+	if (ACPI_FAILURE(status)) {
+		dev_err(dev, "error obtaining acpi coherency value\n");
+		return -EINVAL;
+	}
+	pdata->coherent = !!cca;
+
+	return 0;
+}
+#else   /* CONFIG_ACPI */
+static int xgbe_acpi_support(struct xgbe_prv_data *pdata)
+{
+	return -EINVAL;
+}
+#endif  /* CONFIG_ACPI */
+
+#ifdef CONFIG_OF
+static int xgbe_of_support(struct xgbe_prv_data *pdata)
+{
+	struct device *dev = pdata->dev;
+
+	/* Obtain the system clock setting */
+	pdata->sysclk = devm_clk_get(dev, XGBE_DMA_CLOCK);
+	if (IS_ERR(pdata->sysclk)) {
+		dev_err(dev, "dma devm_clk_get failed\n");
+		return PTR_ERR(pdata->sysclk);
+	}
+	pdata->sysclk_rate = clk_get_rate(pdata->sysclk);
+
+	/* Obtain the PTP clock setting */
+	pdata->ptpclk = devm_clk_get(dev, XGBE_PTP_CLOCK);
+	if (IS_ERR(pdata->ptpclk)) {
+		dev_err(dev, "ptp devm_clk_get failed\n");
+		return PTR_ERR(pdata->ptpclk);
+	}
+	pdata->ptpclk_rate = clk_get_rate(pdata->ptpclk);
+
+	/* Retrieve the device cache coherency value */
+	pdata->coherent = of_dma_is_coherent(dev->of_node);
+
+	return 0;
+}
+#else   /* CONFIG_OF */
+static int xgbe_of_support(struct xgbe_prv_data *pdata)
+{
+	return -EINVAL;
+}
+#endif  /*CONFIG_OF */
+
 static int xgbe_probe(struct platform_device *pdev)
 {
 	struct xgbe_prv_data *pdata;
@@ -169,7 +263,7 @@ static int xgbe_probe(struct platform_device *pdev)
 	struct net_device *netdev;
 	struct device *dev = &pdev->dev;
 	struct resource *res;
-	const u8 *mac_addr;
+	const char *phy_mode;
 	unsigned int i;
 	int ret;
 
@@ -186,6 +280,7 @@ static int xgbe_probe(struct platform_device *pdev)
 	pdata = netdev_priv(netdev);
 	pdata->netdev = netdev;
 	pdata->pdev = pdev;
+	pdata->adev = ACPI_COMPANION(dev);
 	pdata->dev = dev;
 	platform_set_drvdata(pdev, netdev);
 
@@ -194,6 +289,9 @@ static int xgbe_probe(struct platform_device *pdev)
 	mutex_init(&pdata->rss_mutex);
 	spin_lock_init(&pdata->tstamp_lock);
 
+	/* Check if we should use ACPI or DT */
+	pdata->use_acpi = (!pdata->adev || acpi_disabled) ? 0 : 1;
+
 	/* Set and validate the number of descriptors for a ring */
 	BUILD_BUG_ON_NOT_POWER_OF_2(XGBE_TX_DESC_CNT);
 	pdata->tx_desc_count = XGBE_TX_DESC_CNT;
@@ -212,22 +310,6 @@ static int xgbe_probe(struct platform_device *pdev)
 		goto err_io;
 	}
 
-	/* Obtain the system clock setting */
-	pdata->sysclk = devm_clk_get(dev, XGBE_DMA_CLOCK);
-	if (IS_ERR(pdata->sysclk)) {
-		dev_err(dev, "dma devm_clk_get failed\n");
-		ret = PTR_ERR(pdata->sysclk);
-		goto err_io;
-	}
-
-	/* Obtain the PTP clock setting */
-	pdata->ptpclk = devm_clk_get(dev, XGBE_PTP_CLOCK);
-	if (IS_ERR(pdata->ptpclk)) {
-		dev_err(dev, "ptp devm_clk_get failed\n");
-		ret = PTR_ERR(pdata->ptpclk);
-		goto err_io;
-	}
-
 	/* Obtain the mmio areas for the device */
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	pdata->xgmac_regs = devm_ioremap_resource(dev, res);
@@ -247,16 +329,42 @@ static int xgbe_probe(struct platform_device *pdev)
 	}
 	DBGPR("  xpcs_regs  = %p\n", pdata->xpcs_regs);
 
-	/* Set the DMA mask */
-	if (!dev->dma_mask)
-		dev->dma_mask = &dev->coherent_dma_mask;
-	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(40));
-	if (ret) {
-		dev_err(dev, "dma_set_mask_and_coherent failed\n");
+	/* Retrieve the MAC address */
+	ret = device_property_read_u8_array(dev, XGBE_MAC_ADDR_PROPERTY,
+					    pdata->mac_addr,
+					    sizeof(pdata->mac_addr));
+	if (ret || !is_valid_ether_addr(pdata->mac_addr)) {
+		dev_err(dev, "invalid %s property\n", XGBE_MAC_ADDR_PROPERTY);
+		if (!ret)
+			ret = -EINVAL;
 		goto err_io;
 	}
 
-	if (of_property_read_bool(dev->of_node, "dma-coherent")) {
+	/* Retrieve the PHY mode - it must be "xgmii" */
+	ret = device_property_read_string(dev, XGBE_PHY_MODE_PROPERTY,
+					  &phy_mode);
+	if (ret || strcmp(phy_mode, phy_modes(PHY_INTERFACE_MODE_XGMII))) {
+		dev_err(dev, "invalid %s property\n", XGBE_PHY_MODE_PROPERTY);
+		if (!ret)
+			ret = -EINVAL;
+		goto err_io;
+	}
+	pdata->phy_mode = PHY_INTERFACE_MODE_XGMII;
+
+	/* Check for per channel interrupt support */
+	if (device_property_present(dev, XGBE_DMA_IRQS_PROPERTY))
+		pdata->per_channel_irq = 1;
+
+	/* Obtain device settings unique to ACPI/OF */
+	if (pdata->use_acpi)
+		ret = xgbe_acpi_support(pdata);
+	else
+		ret = xgbe_of_support(pdata);
+	if (ret)
+		goto err_io;
+
+	/* Set the DMA coherency values */
+	if (pdata->coherent) {
 		pdata->axdomain = XGBE_DMA_OS_AXDOMAIN;
 		pdata->arcache = XGBE_DMA_OS_ARCACHE;
 		pdata->awcache = XGBE_DMA_OS_AWCACHE;
@@ -266,10 +374,16 @@ static int xgbe_probe(struct platform_device *pdev)
 		pdata->awcache = XGBE_DMA_SYS_AWCACHE;
 	}
 
-	/* Check for per channel interrupt support */
-	if (of_property_read_bool(dev->of_node, XGBE_DMA_IRQS))
-		pdata->per_channel_irq = 1;
+	/* Set the DMA mask */
+	if (!dev->dma_mask)
+		dev->dma_mask = &dev->coherent_dma_mask;
+	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(40));
+	if (ret) {
+		dev_err(dev, "dma_set_mask_and_coherent failed\n");
+		goto err_io;
+	}
 
+	/* Get the device interrupt */
 	ret = platform_get_irq(pdev, 0);
 	if (ret < 0) {
 		dev_err(dev, "platform_get_irq 0 failed\n");
@@ -279,6 +393,7 @@ static int xgbe_probe(struct platform_device *pdev)
 
 	netdev->irq = pdata->dev_irq;
 	netdev->base_addr = (unsigned long)pdata->xgmac_regs;
+	memcpy(netdev->dev_addr, pdata->mac_addr, netdev->addr_len);
 
 	/* Set all the function pointers */
 	xgbe_init_all_fptrs(pdata);
@@ -291,23 +406,6 @@ static int xgbe_probe(struct platform_device *pdev)
 	/* Populate the hardware features */
 	xgbe_get_all_hw_features(pdata);
 
-	/* Retrieve the MAC address */
-	mac_addr = of_get_mac_address(dev->of_node);
-	if (!mac_addr) {
-		dev_err(dev, "invalid mac address for this device\n");
-		ret = -EINVAL;
-		goto err_io;
-	}
-	memcpy(netdev->dev_addr, mac_addr, netdev->addr_len);
-
-	/* Retrieve the PHY mode - it must be "xgmii" */
-	pdata->phy_mode = of_get_phy_mode(dev->of_node);
-	if (pdata->phy_mode != PHY_INTERFACE_MODE_XGMII) {
-		dev_err(dev, "invalid phy-mode specified for this device\n");
-		ret = -EINVAL;
-		goto err_io;
-	}
-
 	/* Set default configuration data */
 	xgbe_default_config(pdata);
 
@@ -491,18 +589,35 @@ static int xgbe_resume(struct device *dev)
 }
 #endif /* CONFIG_PM */
 
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id xgbe_acpi_match[] = {
+	{ "AMDI8001", 0 },
+	{},
+};
+
+MODULE_DEVICE_TABLE(acpi, xgbe_acpi_match);
+#endif
+
+#ifdef CONFIG_OF
 static const struct of_device_id xgbe_of_match[] = {
 	{ .compatible = "amd,xgbe-seattle-v1a", },
 	{},
 };
 
 MODULE_DEVICE_TABLE(of, xgbe_of_match);
+#endif
+
 static SIMPLE_DEV_PM_OPS(xgbe_pm_ops, xgbe_suspend, xgbe_resume);
 
 static struct platform_driver xgbe_driver = {
 	.driver = {
 		.name = "amd-xgbe",
+#ifdef CONFIG_ACPI
+		.acpi_match_table = xgbe_acpi_match,
+#endif
+#ifdef CONFIG_OF
 		.of_match_table = xgbe_of_match,
+#endif
 		.pm = &xgbe_pm_ops,
 	},
 	.probe = xgbe_probe,

drivers/net/ethernet/amd/xgbe/xgbe-mdio.c

@@ -205,25 +205,16 @@ void xgbe_dump_phy_registers(struct xgbe_prv_data *pdata)
 
 int xgbe_mdio_register(struct xgbe_prv_data *pdata)
 {
-	struct device_node *phy_node;
 	struct mii_bus *mii;
 	struct phy_device *phydev;
 	int ret = 0;
 
 	DBGPR("-->xgbe_mdio_register\n");
 
-	/* Retrieve the phy-handle */
-	phy_node = of_parse_phandle(pdata->dev->of_node, "phy-handle", 0);
-	if (!phy_node) {
-		dev_err(pdata->dev, "unable to parse phy-handle\n");
-		return -EINVAL;
-	}
-
 	mii = mdiobus_alloc();
-	if (mii == NULL) {
+	if (!mii) {
 		dev_err(pdata->dev, "mdiobus_alloc failed\n");
-		ret = -ENOMEM;
-		goto err_node_get;
+		return -ENOMEM;
 	}
 
 	/* Register on the MDIO bus (don't probe any PHYs) */
@@ -252,18 +243,19 @@ int xgbe_mdio_register(struct xgbe_prv_data *pdata)
 	request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT,
 		       MDIO_ID_ARGS(phydev->c45_ids.device_ids[MDIO_MMD_PCS]));
 
-	of_node_get(phy_node);
-	phydev->dev.of_node = phy_node;
 	ret = phy_device_register(phydev);
 	if (ret) {
 		dev_err(pdata->dev, "phy_device_register failed\n");
-		of_node_put(phy_node);
+		goto err_phy_device;
+	}
+	if (!phydev->dev.driver) {
+		dev_err(pdata->dev, "phy driver probe failed\n");
+		ret = -EIO;
 		goto err_phy_device;
 	}
 
 	/* Add a reference to the PHY driver so it can't be unloaded */
-	pdata->phy_module = phydev->dev.driver ?
-			    phydev->dev.driver->owner : NULL;
+	pdata->phy_module = phydev->dev.driver->owner;
 	if (!try_module_get(pdata->phy_module)) {
 		dev_err(pdata->dev, "try_module_get failed\n");
 		ret = -EIO;
@@ -283,8 +275,6 @@ int xgbe_mdio_register(struct xgbe_prv_data *pdata)
 
 	pdata->phydev = phydev;
 
-	of_node_put(phy_node);
-
 	DBGPHY_REGS(pdata);
 
 	DBGPR("<--xgbe_mdio_register\n");
@@ -300,9 +290,6 @@ int xgbe_mdio_register(struct xgbe_prv_data *pdata)
 err_mdiobus_alloc:
 	mdiobus_free(mii);
 
-err_node_get:
-	of_node_put(phy_node);
-
 	return ret;
 }
 

drivers/net/ethernet/amd/xgbe/xgbe-ptp.c

@@ -233,7 +233,7 @@ void xgbe_ptp_register(struct xgbe_prv_data *pdata)
 	snprintf(info->name, sizeof(info->name), "%s",
 		 netdev_name(pdata->netdev));
 	info->owner = THIS_MODULE;
-	info->max_adj = clk_get_rate(pdata->ptpclk);
+	info->max_adj = pdata->ptpclk_rate;
 	info->adjfreq = xgbe_adjfreq;
 	info->adjtime = xgbe_adjtime;
 	info->gettime = xgbe_gettime;
@@ -254,7 +254,7 @@ void xgbe_ptp_register(struct xgbe_prv_data *pdata)
 	 */
 	dividend = 50000000;
 	dividend <<= 32;
-	pdata->tstamp_addend = div_u64(dividend, clk_get_rate(pdata->ptpclk));
+	pdata->tstamp_addend = div_u64(dividend, pdata->ptpclk_rate);
 
 	/* Setup the timecounter */
 	cc->read = xgbe_cc_read;

drivers/net/ethernet/amd/xgbe/xgbe.h

@@ -182,10 +182,18 @@
 #define XGBE_PHY_NAME		"amd_xgbe_phy"
 #define XGBE_PRTAD		0
 
+/* Common property names */
+#define XGBE_MAC_ADDR_PROPERTY	"mac-address"
+#define XGBE_PHY_MODE_PROPERTY	"phy-mode"
+#define XGBE_DMA_IRQS_PROPERTY	"amd,per-channel-interrupt"
+
 /* Device-tree clock names */
 #define XGBE_DMA_CLOCK		"dma_clk"
 #define XGBE_PTP_CLOCK		"ptp_clk"
-#define XGBE_DMA_IRQS		"amd,per-channel-interrupt"
+
+/* ACPI property names */
+#define XGBE_ACPI_DMA_FREQ	"amd,dma-freq"
+#define XGBE_ACPI_PTP_FREQ	"amd,ptp-freq"
 
 /* Timestamp support - values based on 50MHz PTP clock
  *   50MHz => 20 nsec
@@ -361,8 +369,7 @@ struct xgbe_ring {
 	 *  cur   - Tx: index of descriptor to be used for current transfer
 	 *          Rx: index of descriptor to check for packet availability
 	 *  dirty - Tx: index of descriptor to check for transfer complete
-	 *          Rx: count of descriptors in which a packet has been received
-	 *              (used with skb_realloc_index to refresh the ring)
+	 *          Rx: index of descriptor to check for buffer reallocation
 	 */
 	unsigned int cur;
 	unsigned int dirty;
@@ -377,11 +384,6 @@ struct xgbe_ring {
 			unsigned short cur_mss;
 			unsigned short cur_vlan_ctag;
 		} tx;
-
-		struct {
-			unsigned int realloc_index;
-			unsigned int realloc_threshold;
-		} rx;
 	};
 } ____cacheline_aligned;
 
@@ -596,7 +598,8 @@ struct xgbe_desc_if {
 	int (*alloc_ring_resources)(struct xgbe_prv_data *);
 	void (*free_ring_resources)(struct xgbe_prv_data *);
 	int (*map_tx_skb)(struct xgbe_channel *, struct sk_buff *);
-	void (*realloc_rx_buffer)(struct xgbe_channel *);
+	int (*map_rx_buffer)(struct xgbe_prv_data *, struct xgbe_ring *,
+			     struct xgbe_ring_data *);
 	void (*unmap_rdata)(struct xgbe_prv_data *, struct xgbe_ring_data *);
 	void (*wrapper_tx_desc_init)(struct xgbe_prv_data *);
 	void (*wrapper_rx_desc_init)(struct xgbe_prv_data *);
@@ -650,8 +653,12 @@ struct xgbe_hw_features {
 struct xgbe_prv_data {
 	struct net_device *netdev;
 	struct platform_device *pdev;
+	struct acpi_device *adev;
 	struct device *dev;
 
+	/* ACPI or DT flag */
+	unsigned int use_acpi;
+
 	/* XGMAC/XPCS related mmio registers */
 	void __iomem *xgmac_regs;	/* XGMAC CSRs */
 	void __iomem *xpcs_regs;	/* XPCS MMD registers */
@@ -672,6 +679,7 @@ struct xgbe_prv_data {
 	struct xgbe_desc_if desc_if;
 
 	/* AXI DMA settings */
+	unsigned int coherent;
 	unsigned int axdomain;
 	unsigned int arcache;
 	unsigned int awcache;
@@ -739,6 +747,7 @@ struct xgbe_prv_data {
 	unsigned int phy_rx_pause;
 
 	/* Netdev related settings */
+	unsigned char mac_addr[ETH_ALEN];
 	netdev_features_t netdev_features;
 	struct napi_struct napi;
 	struct xgbe_mmc_stats mmc_stats;
@@ -748,7 +757,9 @@ struct xgbe_prv_data {
 
 	/* Device clocks */
 	struct clk *sysclk;
+	unsigned long sysclk_rate;
 	struct clk *ptpclk;
+	unsigned long ptpclk_rate;
 
 	/* Timestamp support */
 	spinlock_t tstamp_lock;

drivers/net/phy/Kconfig

@@ -26,7 +26,7 @@ config AMD_PHY
 
 config AMD_XGBE_PHY
 	tristate "Driver for the AMD 10GbE (amd-xgbe) PHYs"
-	depends on OF && HAS_IOMEM
+	depends on (OF || ACPI) && HAS_IOMEM
 	---help---
 	  Currently supports the AMD 10GbE PHY