Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1875 insertions, 0 deletions

diff --git a/drivers/net/ethernet/toshiba/ps3_gelic_net.c b/drivers/net/ethernet/toshiba/ps3_gelic_net.c
new file mode 100644
index 000000000..9d535ae59
--- /dev/null
+++ b/drivers/net/ethernet/toshiba/ps3_gelic_net.c
@@ -0,0 +1,1875 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  PS3 gelic network driver.
+ *
+ * Copyright (C) 2007 Sony Computer Entertainment Inc.
+ * Copyright 2006, 2007 Sony Corporation
+ *
+ * This file is based on: spider_net.c
+ *
+ * (C) Copyright IBM Corp. 2005
+ *
+ * Authors : Utz Bacher <utz.bacher@de.ibm.com>
+ *           Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
+ */
+
+#undef DEBUG
+
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/if_vlan.h>
+
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/tcp.h>
+
+#include <linux/dma-mapping.h>
+#include <net/checksum.h>
+#include <asm/firmware.h>
+#include <asm/ps3.h>
+#include <asm/lv1call.h>
+
+#include "ps3_gelic_net.h"
+#include "ps3_gelic_wireless.h"
+
+#define DRV_NAME "Gelic Network Driver"
+#define DRV_VERSION "2.0"
+
+MODULE_AUTHOR("SCE Inc.");
+MODULE_DESCRIPTION("Gelic Network driver");
+MODULE_LICENSE("GPL");
+
+
+/* set irq_mask */
+int gelic_card_set_irq_mask(struct gelic_card *card, u64 mask)
+{
+	int status;
+
+	status = lv1_net_set_interrupt_mask(bus_id(card), dev_id(card),
+					    mask, 0);
+	if (status)
+		dev_info(ctodev(card),
+			 "%s failed %d\n", __func__, status);
+	return status;
+}
+
+static void gelic_card_rx_irq_on(struct gelic_card *card)
+{
+	card->irq_mask |= GELIC_CARD_RXINT;
+	gelic_card_set_irq_mask(card, card->irq_mask);
+}
+static void gelic_card_rx_irq_off(struct gelic_card *card)
+{
+	card->irq_mask &= ~GELIC_CARD_RXINT;
+	gelic_card_set_irq_mask(card, card->irq_mask);
+}
+
+static void gelic_card_get_ether_port_status(struct gelic_card *card,
+					     int inform)
+{
+	u64 v2;
+	struct net_device *ether_netdev;
+
+	lv1_net_control(bus_id(card), dev_id(card),
+			GELIC_LV1_GET_ETH_PORT_STATUS,
+			GELIC_LV1_VLAN_TX_ETHERNET_0, 0, 0,
+			&card->ether_port_status, &v2);
+
+	if (inform) {
+		ether_netdev = card->netdev[GELIC_PORT_ETHERNET_0];
+		if (card->ether_port_status & GELIC_LV1_ETHER_LINK_UP)
+			netif_carrier_on(ether_netdev);
+		else
+			netif_carrier_off(ether_netdev);
+	}
+}
+
+/**
+ * gelic_descr_get_status -- returns the status of a descriptor
+ * @descr: descriptor to look at
+ *
+ * returns the status as in the dmac_cmd_status field of the descriptor
+ */
+static enum gelic_descr_dma_status
+gelic_descr_get_status(struct gelic_descr *descr)
+{
+	return be32_to_cpu(descr->dmac_cmd_status) & GELIC_DESCR_DMA_STAT_MASK;
+}
+
+static int gelic_card_set_link_mode(struct gelic_card *card, int mode)
+{
+	int status;
+	u64 v1, v2;
+
+	status = lv1_net_control(bus_id(card), dev_id(card),
+				 GELIC_LV1_SET_NEGOTIATION_MODE,
+				 GELIC_LV1_PHY_ETHERNET_0, mode, 0, &v1, &v2);
+	if (status) {
+		pr_info("%s: failed setting negotiation mode %d\n", __func__,
+			status);
+		return -EBUSY;
+	}
+
+	card->link_mode = mode;
+	return 0;
+}
+
+/**
+ * gelic_card_disable_txdmac - disables the transmit DMA controller
+ * @card: card structure
+ *
+ * gelic_card_disable_txdmac terminates processing on the DMA controller by
+ * turing off DMA and issuing a force end
+ */
+static void gelic_card_disable_txdmac(struct gelic_card *card)
+{
+	int status;
+
+	/* this hvc blocks until the DMA in progress really stopped */
+	status = lv1_net_stop_tx_dma(bus_id(card), dev_id(card));
+	if (status)
+		dev_err(ctodev(card),
+			"lv1_net_stop_tx_dma failed, status=%d\n", status);
+}
+
+/**
+ * gelic_card_enable_rxdmac - enables the receive DMA controller
+ * @card: card structure
+ *
+ * gelic_card_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
+ * in the GDADMACCNTR register
+ */
+static void gelic_card_enable_rxdmac(struct gelic_card *card)
+{
+	int status;
+
+#ifdef DEBUG
+	if (gelic_descr_get_status(card->rx_chain.head) !=
+	    GELIC_DESCR_DMA_CARDOWNED) {
+		printk(KERN_ERR "%s: status=%x\n", __func__,
+		       be32_to_cpu(card->rx_chain.head->dmac_cmd_status));
+		printk(KERN_ERR "%s: nextphy=%x\n", __func__,
+		       be32_to_cpu(card->rx_chain.head->next_descr_addr));
+		printk(KERN_ERR "%s: head=%p\n", __func__,
+		       card->rx_chain.head);
+	}
+#endif
+	status = lv1_net_start_rx_dma(bus_id(card), dev_id(card),
+				card->rx_chain.head->bus_addr, 0);
+	if (status)
+		dev_info(ctodev(card),
+			 "lv1_net_start_rx_dma failed, status=%d\n", status);
+}
+
+/**
+ * gelic_card_disable_rxdmac - disables the receive DMA controller
+ * @card: card structure
+ *
+ * gelic_card_disable_rxdmac terminates processing on the DMA controller by
+ * turing off DMA and issuing a force end
+ */
+static void gelic_card_disable_rxdmac(struct gelic_card *card)
+{
+	int status;
+
+	/* this hvc blocks until the DMA in progress really stopped */
+	status = lv1_net_stop_rx_dma(bus_id(card), dev_id(card));
+	if (status)
+		dev_err(ctodev(card),
+			"lv1_net_stop_rx_dma failed, %d\n", status);
+}
+
+/**
+ * gelic_descr_set_status -- sets the status of a descriptor
+ * @descr: descriptor to change
+ * @status: status to set in the descriptor
+ *
+ * changes the status to the specified value. Doesn't change other bits
+ * in the status
+ */
+static void gelic_descr_set_status(struct gelic_descr *descr,
+				   enum gelic_descr_dma_status status)
+{
+	descr->dmac_cmd_status = cpu_to_be32(status |
+			(be32_to_cpu(descr->dmac_cmd_status) &
+			 ~GELIC_DESCR_DMA_STAT_MASK));
+	/*
+	 * dma_cmd_status field is used to indicate whether the descriptor
+	 * is valid or not.
+	 * Usually caller of this function wants to inform that to the
+	 * hardware, so we assure here the hardware sees the change.
+	 */
+	wmb();
+}
+
+/**
+ * gelic_card_reset_chain - reset status of a descriptor chain
+ * @card: card structure
+ * @chain: address of chain
+ * @start_descr: address of descriptor array
+ *
+ * Reset the status of dma descriptors to ready state
+ * and re-initialize the hardware chain for later use
+ */
+static void gelic_card_reset_chain(struct gelic_card *card,
+				   struct gelic_descr_chain *chain,
+				   struct gelic_descr *start_descr)
+{
+	struct gelic_descr *descr;
+
+	for (descr = start_descr; start_descr != descr->next; descr++) {
+		gelic_descr_set_status(descr, GELIC_DESCR_DMA_CARDOWNED);
+		descr->next_descr_addr = cpu_to_be32(descr->next->bus_addr);
+	}
+
+	chain->head = start_descr;
+	chain->tail = (descr - 1);
+
+	(descr - 1)->next_descr_addr = 0;
+}
+
+void gelic_card_up(struct gelic_card *card)
+{
+	pr_debug("%s: called\n", __func__);
+	mutex_lock(&card->updown_lock);
+	if (atomic_inc_return(&card->users) == 1) {
+		pr_debug("%s: real do\n", __func__);
+		/* enable irq */
+		gelic_card_set_irq_mask(card, card->irq_mask);
+		/* start rx */
+		gelic_card_enable_rxdmac(card);
+
+		napi_enable(&card->napi);
+	}
+	mutex_unlock(&card->updown_lock);
+	pr_debug("%s: done\n", __func__);
+}
+
+void gelic_card_down(struct gelic_card *card)
+{
+	u64 mask;
+	pr_debug("%s: called\n", __func__);
+	mutex_lock(&card->updown_lock);
+	if (atomic_dec_if_positive(&card->users) == 0) {
+		pr_debug("%s: real do\n", __func__);
+		napi_disable(&card->napi);
+		/*
+		 * Disable irq. Wireless interrupts will
+		 * be disabled later if any
+		 */
+		mask = card->irq_mask & (GELIC_CARD_WLAN_EVENT_RECEIVED |
+					 GELIC_CARD_WLAN_COMMAND_COMPLETED);
+		gelic_card_set_irq_mask(card, mask);
+		/* stop rx */
+		gelic_card_disable_rxdmac(card);
+		gelic_card_reset_chain(card, &card->rx_chain,
+				       card->descr + GELIC_NET_TX_DESCRIPTORS);
+		/* stop tx */
+		gelic_card_disable_txdmac(card);
+	}
+	mutex_unlock(&card->updown_lock);
+	pr_debug("%s: done\n", __func__);
+}
+
+/**
+ * gelic_card_free_chain - free descriptor chain
+ * @card: card structure
+ * @descr_in: address of desc
+ */
+static void gelic_card_free_chain(struct gelic_card *card,
+				  struct gelic_descr *descr_in)
+{
+	struct gelic_descr *descr;
+
+	for (descr = descr_in; descr && descr->bus_addr; descr = descr->next) {
+		dma_unmap_single(ctodev(card), descr->bus_addr,
+				 GELIC_DESCR_SIZE, DMA_BIDIRECTIONAL);
+		descr->bus_addr = 0;
+	}
+}
+
+/**
+ * gelic_card_init_chain - links descriptor chain
+ * @card: card structure
+ * @chain: address of chain
+ * @start_descr: address of descriptor array
+ * @no: number of descriptors
+ *
+ * we manage a circular list that mirrors the hardware structure,
+ * except that the hardware uses bus addresses.
+ *
+ * returns 0 on success, <0 on failure
+ */
+static int gelic_card_init_chain(struct gelic_card *card,
+				 struct gelic_descr_chain *chain,
+				 struct gelic_descr *start_descr, int no)
+{
+	int i;
+	struct gelic_descr *descr;
+
+	descr = start_descr;
+	memset(descr, 0, sizeof(*descr) * no);
+
+	/* set up the hardware pointers in each descriptor */
+	for (i = 0; i < no; i++, descr++) {
+		dma_addr_t cpu_addr;
+
+		gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
+
+		cpu_addr = dma_map_single(ctodev(card), descr,
+					  GELIC_DESCR_SIZE, DMA_BIDIRECTIONAL);
+
+		if (dma_mapping_error(ctodev(card), cpu_addr))
+			goto iommu_error;
+
+		descr->bus_addr = cpu_to_be32(cpu_addr);
+		descr->next = descr + 1;
+		descr->prev = descr - 1;
+	}
+	/* make them as ring */
+	(descr - 1)->next = start_descr;
+	start_descr->prev = (descr - 1);
+
+	/* chain bus addr of hw descriptor */
+	descr = start_descr;
+	for (i = 0; i < no; i++, descr++) {
+		descr->next_descr_addr = cpu_to_be32(descr->next->bus_addr);
+	}
+
+	chain->head = start_descr;
+	chain->tail = start_descr;
+
+	/* do not chain last hw descriptor */
+	(descr - 1)->next_descr_addr = 0;
+
+	return 0;
+
+iommu_error:
+	for (i--, descr--; 0 <= i; i--, descr--)
+		if (descr->bus_addr)
+			dma_unmap_single(ctodev(card), descr->bus_addr,
+					 GELIC_DESCR_SIZE,
+					 DMA_BIDIRECTIONAL);
+	return -ENOMEM;
+}
+
+/**
+ * gelic_descr_prepare_rx - reinitializes a rx descriptor
+ * @card: card structure
+ * @descr: descriptor to re-init
+ *
+ * return 0 on success, <0 on failure
+ *
+ * allocates a new rx skb, iommu-maps it and attaches it to the descriptor.
+ * Activate the descriptor state-wise
+ *
+ * Gelic RX sk_buffs must be aligned to GELIC_NET_RXBUF_ALIGN and the length
+ * must be a multiple of GELIC_NET_RXBUF_ALIGN.
+ */
+static int gelic_descr_prepare_rx(struct gelic_card *card,
+				  struct gelic_descr *descr)
+{
+	static const unsigned int rx_skb_size =
+		ALIGN(GELIC_NET_MAX_FRAME, GELIC_NET_RXBUF_ALIGN) +
+		GELIC_NET_RXBUF_ALIGN - 1;
+	dma_addr_t cpu_addr;
+	int offset;
+
+	if (gelic_descr_get_status(descr) !=  GELIC_DESCR_DMA_NOT_IN_USE)
+		dev_info(ctodev(card), "%s: ERROR status\n", __func__);
+
+	descr->skb = netdev_alloc_skb(*card->netdev, rx_skb_size);
+	if (!descr->skb) {
+		descr->buf_addr = 0; /* tell DMAC don't touch memory */
+		return -ENOMEM;
+	}
+	descr->buf_size = cpu_to_be32(rx_skb_size);
+	descr->dmac_cmd_status = 0;
+	descr->result_size = 0;
+	descr->valid_size = 0;
+	descr->data_error = 0;
+
+	offset = ((unsigned long)descr->skb->data) &
+		(GELIC_NET_RXBUF_ALIGN - 1);
+	if (offset)
+		skb_reserve(descr->skb, GELIC_NET_RXBUF_ALIGN - offset);
+	/* io-mmu-map the skb */
+	cpu_addr = dma_map_single(ctodev(card), descr->skb->data,
+				  GELIC_NET_MAX_FRAME, DMA_FROM_DEVICE);
+	descr->buf_addr = cpu_to_be32(cpu_addr);
+	if (dma_mapping_error(ctodev(card), cpu_addr)) {
+		dev_kfree_skb_any(descr->skb);
+		descr->skb = NULL;
+		dev_info(ctodev(card),
+			 "%s:Could not iommu-map rx buffer\n", __func__);
+		gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
+		return -ENOMEM;
+	} else {
+		gelic_descr_set_status(descr, GELIC_DESCR_DMA_CARDOWNED);
+		return 0;
+	}
+}
+
+/**
+ * gelic_card_release_rx_chain - free all skb of rx descr
+ * @card: card structure
+ *
+ */
+static void gelic_card_release_rx_chain(struct gelic_card *card)
+{
+	struct gelic_descr *descr = card->rx_chain.head;
+
+	do {
+		if (descr->skb) {
+			dma_unmap_single(ctodev(card),
+					 be32_to_cpu(descr->buf_addr),
+					 descr->skb->len,
+					 DMA_FROM_DEVICE);
+			descr->buf_addr = 0;
+			dev_kfree_skb_any(descr->skb);
+			descr->skb = NULL;
+			gelic_descr_set_status(descr,
+					       GELIC_DESCR_DMA_NOT_IN_USE);
+		}
+		descr = descr->next;
+	} while (descr != card->rx_chain.head);
+}
+
+/**
+ * gelic_card_fill_rx_chain - fills descriptors/skbs in the rx chains
+ * @card: card structure
+ *
+ * fills all descriptors in the rx chain: allocates skbs
+ * and iommu-maps them.
+ * returns 0 on success, < 0 on failure
+ */
+static int gelic_card_fill_rx_chain(struct gelic_card *card)
+{
+	struct gelic_descr *descr = card->rx_chain.head;
+	int ret;
+
+	do {
+		if (!descr->skb) {
+			ret = gelic_descr_prepare_rx(card, descr);
+			if (ret)
+				goto rewind;
+		}
+		descr = descr->next;
+	} while (descr != card->rx_chain.head);
+
+	return 0;
+rewind:
+	gelic_card_release_rx_chain(card);
+	return ret;
+}
+
+/**
+ * gelic_card_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
+ * @card: card structure
+ *
+ * returns 0 on success, < 0 on failure
+ */
+static int gelic_card_alloc_rx_skbs(struct gelic_card *card)
+{
+	struct gelic_descr_chain *chain;
+	int ret;
+	chain = &card->rx_chain;
+	ret = gelic_card_fill_rx_chain(card);
+	chain->tail = card->rx_top->prev; /* point to the last */
+	return ret;
+}
+
+/**
+ * gelic_descr_release_tx - processes a used tx descriptor
+ * @card: card structure
+ * @descr: descriptor to release
+ *
+ * releases a used tx descriptor (unmapping, freeing of skb)
+ */
+static void gelic_descr_release_tx(struct gelic_card *card,
+				       struct gelic_descr *descr)
+{
+	struct sk_buff *skb = descr->skb;
+
+	BUG_ON(!(be32_to_cpu(descr->data_status) & GELIC_DESCR_TX_TAIL));
+
+	dma_unmap_single(ctodev(card), be32_to_cpu(descr->buf_addr), skb->len,
+			 DMA_TO_DEVICE);
+	dev_kfree_skb_any(skb);
+
+	descr->buf_addr = 0;
+	descr->buf_size = 0;
+	descr->next_descr_addr = 0;
+	descr->result_size = 0;
+	descr->valid_size = 0;
+	descr->data_status = 0;
+	descr->data_error = 0;
+	descr->skb = NULL;
+
+	/* set descr status */
+	gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
+}
+
+static void gelic_card_stop_queues(struct gelic_card *card)
+{
+	netif_stop_queue(card->netdev[GELIC_PORT_ETHERNET_0]);
+
+	if (card->netdev[GELIC_PORT_WIRELESS])
+		netif_stop_queue(card->netdev[GELIC_PORT_WIRELESS]);
+}
+static void gelic_card_wake_queues(struct gelic_card *card)
+{
+	netif_wake_queue(card->netdev[GELIC_PORT_ETHERNET_0]);
+
+	if (card->netdev[GELIC_PORT_WIRELESS])
+		netif_wake_queue(card->netdev[GELIC_PORT_WIRELESS]);
+}
+/**
+ * gelic_card_release_tx_chain - processes sent tx descriptors
+ * @card: adapter structure
+ * @stop: net_stop sequence
+ *
+ * releases the tx descriptors that gelic has finished with
+ */
+static void gelic_card_release_tx_chain(struct gelic_card *card, int stop)
+{
+	struct gelic_descr_chain *tx_chain;
+	enum gelic_descr_dma_status status;
+	struct net_device *netdev;
+	int release = 0;
+
+	for (tx_chain = &card->tx_chain;
+	     tx_chain->head != tx_chain->tail && tx_chain->tail;
+	     tx_chain->tail = tx_chain->tail->next) {
+		status = gelic_descr_get_status(tx_chain->tail);
+		netdev = tx_chain->tail->skb->dev;
+		switch (status) {
+		case GELIC_DESCR_DMA_RESPONSE_ERROR:
+		case GELIC_DESCR_DMA_PROTECTION_ERROR:
+		case GELIC_DESCR_DMA_FORCE_END:
+			if (printk_ratelimit())
+				dev_info(ctodev(card),
+					 "%s: forcing end of tx descriptor " \
+					 "with status %x\n",
+					 __func__, status);
+			netdev->stats.tx_dropped++;
+			break;
+
+		case GELIC_DESCR_DMA_COMPLETE:
+			if (tx_chain->tail->skb) {
+				netdev->stats.tx_packets++;
+				netdev->stats.tx_bytes +=
+					tx_chain->tail->skb->len;
+			}
+			break;
+
+		case GELIC_DESCR_DMA_CARDOWNED:
+			/* pending tx request */
+		default:
+			/* any other value (== GELIC_DESCR_DMA_NOT_IN_USE) */
+			if (!stop)
+				goto out;
+		}
+		gelic_descr_release_tx(card, tx_chain->tail);
+		release ++;
+	}
+out:
+	if (!stop && release)
+		gelic_card_wake_queues(card);
+}
+
+/**
+ * gelic_net_set_multi - sets multicast addresses and promisc flags
+ * @netdev: interface device structure
+ *
+ * gelic_net_set_multi configures multicast addresses as needed for the
+ * netdev interface. It also sets up multicast, allmulti and promisc
+ * flags appropriately
+ */
+void gelic_net_set_multi(struct net_device *netdev)
+{
+	struct gelic_card *card = netdev_card(netdev);
+	struct netdev_hw_addr *ha;
+	unsigned int i;
+	uint8_t *p;
+	u64 addr;
+	int status;
+
+	/* clear all multicast address */
+	status = lv1_net_remove_multicast_address(bus_id(card), dev_id(card),
+						  0, 1);
+	if (status)
+		dev_err(ctodev(card),
+			"lv1_net_remove_multicast_address failed %d\n",
+			status);
+	/* set broadcast address */
+	status = lv1_net_add_multicast_address(bus_id(card), dev_id(card),
+					       GELIC_NET_BROADCAST_ADDR, 0);
+	if (status)
+		dev_err(ctodev(card),
+			"lv1_net_add_multicast_address failed, %d\n",
+			status);
+
+	if ((netdev->flags & IFF_ALLMULTI) ||
+	    (netdev_mc_count(netdev) > GELIC_NET_MC_COUNT_MAX)) {
+		status = lv1_net_add_multicast_address(bus_id(card),
+						       dev_id(card),
+						       0, 1);
+		if (status)
+			dev_err(ctodev(card),
+				"lv1_net_add_multicast_address failed, %d\n",
+				status);
+		return;
+	}
+
+	/* set multicast addresses */
+	netdev_for_each_mc_addr(ha, netdev) {
+		addr = 0;
+		p = ha->addr;
+		for (i = 0; i < ETH_ALEN; i++) {
+			addr <<= 8;
+			addr |= *p++;
+		}
+		status = lv1_net_add_multicast_address(bus_id(card),
+						       dev_id(card),
+						       addr, 0);
+		if (status)
+			dev_err(ctodev(card),
+				"lv1_net_add_multicast_address failed, %d\n",
+				status);
+	}
+}
+
+/**
+ * gelic_net_stop - called upon ifconfig down
+ * @netdev: interface device structure
+ *
+ * always returns 0
+ */
+int gelic_net_stop(struct net_device *netdev)
+{
+	struct gelic_card *card;
+
+	pr_debug("%s: start\n", __func__);
+
+	netif_stop_queue(netdev);
+	netif_carrier_off(netdev);
+
+	card = netdev_card(netdev);
+	gelic_card_down(card);
+
+	pr_debug("%s: done\n", __func__);
+	return 0;
+}
+
+/**
+ * gelic_card_get_next_tx_descr - returns the next available tx descriptor
+ * @card: device structure to get descriptor from
+ *
+ * returns the address of the next descriptor, or NULL if not available.
+ */
+static struct gelic_descr *
+gelic_card_get_next_tx_descr(struct gelic_card *card)
+{
+	if (!card->tx_chain.head)
+		return NULL;
+	/*  see if the next descriptor is free */
+	if (card->tx_chain.tail != card->tx_chain.head->next &&
+	    gelic_descr_get_status(card->tx_chain.head) ==
+	    GELIC_DESCR_DMA_NOT_IN_USE)
+		return card->tx_chain.head;
+	else
+		return NULL;
+
+}
+
+/**
+ * gelic_net_set_txdescr_cmdstat - sets the tx descriptor command field
+ * @descr: descriptor structure to fill out
+ * @skb: packet to consider
+ *
+ * fills out the command and status field of the descriptor structure,
+ * depending on hardware checksum settings. This function assumes a wmb()
+ * has executed before.
+ */
+static void gelic_descr_set_tx_cmdstat(struct gelic_descr *descr,
+				       struct sk_buff *skb)
+{
+	if (skb->ip_summed != CHECKSUM_PARTIAL)
+		descr->dmac_cmd_status =
+			cpu_to_be32(GELIC_DESCR_DMA_CMD_NO_CHKSUM |
+				    GELIC_DESCR_TX_DMA_FRAME_TAIL);
+	else {
+		/* is packet ip?
+		 * if yes: tcp? udp? */
+		if (skb->protocol == htons(ETH_P_IP)) {
+			if (ip_hdr(skb)->protocol == IPPROTO_TCP)
+				descr->dmac_cmd_status =
+				cpu_to_be32(GELIC_DESCR_DMA_CMD_TCP_CHKSUM |
+					    GELIC_DESCR_TX_DMA_FRAME_TAIL);
+
+			else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
+				descr->dmac_cmd_status =
+				cpu_to_be32(GELIC_DESCR_DMA_CMD_UDP_CHKSUM |
+					    GELIC_DESCR_TX_DMA_FRAME_TAIL);
+			else	/*
+				 * the stack should checksum non-tcp and non-udp
+				 * packets on his own: NETIF_F_IP_CSUM
+				 */
+				descr->dmac_cmd_status =
+				cpu_to_be32(GELIC_DESCR_DMA_CMD_NO_CHKSUM |
+					    GELIC_DESCR_TX_DMA_FRAME_TAIL);
+		}
+	}
+}
+
+static struct sk_buff *gelic_put_vlan_tag(struct sk_buff *skb,
+						 unsigned short tag)
+{
+	struct vlan_ethhdr *veth;
+	static unsigned int c;
+
+	if (skb_headroom(skb) < VLAN_HLEN) {
+		struct sk_buff *sk_tmp = skb;
+		pr_debug("%s: hd=%d c=%ud\n", __func__, skb_headroom(skb), c);
+		skb = skb_realloc_headroom(sk_tmp, VLAN_HLEN);
+		if (!skb)
+			return NULL;
+		dev_kfree_skb_any(sk_tmp);
+	}
+	veth = skb_push(skb, VLAN_HLEN);
+
+	/* Move the mac addresses to the top of buffer */
+	memmove(skb->data, skb->data + VLAN_HLEN, 2 * ETH_ALEN);
+
+	veth->h_vlan_proto = cpu_to_be16(ETH_P_8021Q);
+	veth->h_vlan_TCI = htons(tag);
+
+	return skb;
+}
+
+/**
+ * gelic_descr_prepare_tx - setup a descriptor for sending packets
+ * @card: card structure
+ * @descr: descriptor structure
+ * @skb: packet to use
+ *
+ * returns 0 on success, <0 on failure.
+ *
+ */
+static int gelic_descr_prepare_tx(struct gelic_card *card,
+				  struct gelic_descr *descr,
+				  struct sk_buff *skb)
+{
+	dma_addr_t buf;
+
+	if (card->vlan_required) {
+		struct sk_buff *skb_tmp;
+		enum gelic_port_type type;
+
+		type = netdev_port(skb->dev)->type;
+		skb_tmp = gelic_put_vlan_tag(skb,
+					     card->vlan[type].tx);
+		if (!skb_tmp)
+			return -ENOMEM;
+		skb = skb_tmp;
+	}
+
+	buf = dma_map_single(ctodev(card), skb->data, skb->len, DMA_TO_DEVICE);
+
+	if (dma_mapping_error(ctodev(card), buf)) {
+		dev_err(ctodev(card),
+			"dma map 2 failed (%p, %i). Dropping packet\n",
+			skb->data, skb->len);
+		return -ENOMEM;
+	}
+
+	descr->buf_addr = cpu_to_be32(buf);
+	descr->buf_size = cpu_to_be32(skb->len);
+	descr->skb = skb;
+	descr->data_status = 0;
+	descr->next_descr_addr = 0; /* terminate hw descr */
+	gelic_descr_set_tx_cmdstat(descr, skb);
+
+	/* bump free descriptor pointer */
+	card->tx_chain.head = descr->next;
+	return 0;
+}
+
+/**
+ * gelic_card_kick_txdma - enables TX DMA processing
+ * @card: card structure
+ * @descr: descriptor address to enable TX processing at
+ *
+ */
+static int gelic_card_kick_txdma(struct gelic_card *card,
+				 struct gelic_descr *descr)
+{
+	int status = 0;
+
+	if (card->tx_dma_progress)
+		return 0;
+
+	if (gelic_descr_get_status(descr) == GELIC_DESCR_DMA_CARDOWNED) {
+		card->tx_dma_progress = 1;
+		status = lv1_net_start_tx_dma(bus_id(card), dev_id(card),
+					      descr->bus_addr, 0);
+		if (status) {
+			card->tx_dma_progress = 0;
+			dev_info(ctodev(card), "lv1_net_start_txdma failed," \
+				 "status=%d\n", status);
+		}
+	}
+	return status;
+}
+
+/**
+ * gelic_net_xmit - transmits a frame over the device
+ * @skb: packet to send out
+ * @netdev: interface device structure
+ *
+ * returns NETDEV_TX_OK on success, NETDEV_TX_BUSY on failure
+ */
+netdev_tx_t gelic_net_xmit(struct sk_buff *skb, struct net_device *netdev)
+{
+	struct gelic_card *card = netdev_card(netdev);
+	struct gelic_descr *descr;
+	int result;
+	unsigned long flags;
+
+	spin_lock_irqsave(&card->tx_lock, flags);
+
+	gelic_card_release_tx_chain(card, 0);
+
+	descr = gelic_card_get_next_tx_descr(card);
+	if (!descr) {
+		/*
+		 * no more descriptors free
+		 */
+		gelic_card_stop_queues(card);
+		spin_unlock_irqrestore(&card->tx_lock, flags);
+		return NETDEV_TX_BUSY;
+	}
+
+	result = gelic_descr_prepare_tx(card, descr, skb);
+	if (result) {
+		/*
+		 * DMA map failed.  As chances are that failure
+		 * would continue, just release skb and return
+		 */
+		netdev->stats.tx_dropped++;
+		dev_kfree_skb_any(skb);
+		spin_unlock_irqrestore(&card->tx_lock, flags);
+		return NETDEV_TX_OK;
+	}
+	/*
+	 * link this prepared descriptor to previous one
+	 * to achieve high performance
+	 */
+	descr->prev->next_descr_addr = cpu_to_be32(descr->bus_addr);
+	/*
+	 * as hardware descriptor is modified in the above lines,
+	 * ensure that the hardware sees it
+	 */
+	wmb();
+	if (gelic_card_kick_txdma(card, descr)) {
+		/*
+		 * kick failed.
+		 * release descriptor which was just prepared
+		 */
+		netdev->stats.tx_dropped++;
+		/* don't trigger BUG_ON() in gelic_descr_release_tx */
+		descr->data_status = cpu_to_be32(GELIC_DESCR_TX_TAIL);
+		gelic_descr_release_tx(card, descr);
+		/* reset head */
+		card->tx_chain.head = descr;
+		/* reset hw termination */
+		descr->prev->next_descr_addr = 0;
+		dev_info(ctodev(card), "%s: kick failure\n", __func__);
+	}
+
+	spin_unlock_irqrestore(&card->tx_lock, flags);
+	return NETDEV_TX_OK;
+}
+
+/**
+ * gelic_net_pass_skb_up - takes an skb from a descriptor and passes it on
+ * @descr: descriptor to process
+ * @card: card structure
+ * @netdev: net_device structure to be passed packet
+ *
+ * iommu-unmaps the skb, fills out skb structure and passes the data to the
+ * stack. The descriptor state is not changed.
+ */
+static void gelic_net_pass_skb_up(struct gelic_descr *descr,
+				  struct gelic_card *card,
+				  struct net_device *netdev)
+
+{
+	struct sk_buff *skb = descr->skb;
+	u32 data_status, data_error;
+
+	data_status = be32_to_cpu(descr->data_status);
+	data_error = be32_to_cpu(descr->data_error);
+	/* unmap skb buffer */
+	dma_unmap_single(ctodev(card), be32_to_cpu(descr->buf_addr),
+			 GELIC_NET_MAX_FRAME,
+			 DMA_FROM_DEVICE);
+
+	skb_put(skb, be32_to_cpu(descr->valid_size)?
+		be32_to_cpu(descr->valid_size) :
+		be32_to_cpu(descr->result_size));
+	if (!descr->valid_size)
+		dev_info(ctodev(card), "buffer full %x %x %x\n",
+			 be32_to_cpu(descr->result_size),
+			 be32_to_cpu(descr->buf_size),
+			 be32_to_cpu(descr->dmac_cmd_status));
+
+	descr->skb = NULL;
+	/*
+	 * the card put 2 bytes vlan tag in front
+	 * of the ethernet frame
+	 */
+	skb_pull(skb, 2);
+	skb->protocol = eth_type_trans(skb, netdev);
+
+	/* checksum offload */
+	if (netdev->features & NETIF_F_RXCSUM) {
+		if ((data_status & GELIC_DESCR_DATA_STATUS_CHK_MASK) &&
+		    (!(data_error & GELIC_DESCR_DATA_ERROR_CHK_MASK)))
+			skb->ip_summed = CHECKSUM_UNNECESSARY;
+		else
+			skb_checksum_none_assert(skb);
+	} else
+		skb_checksum_none_assert(skb);
+
+	/* update netdevice statistics */
+	netdev->stats.rx_packets++;
+	netdev->stats.rx_bytes += skb->len;
+
+	/* pass skb up to stack */
+	netif_receive_skb(skb);
+}
+
+/**
+ * gelic_card_decode_one_descr - processes an rx descriptor
+ * @card: card structure
+ *
+ * returns 1 if a packet has been sent to the stack, otherwise 0
+ *
+ * processes an rx descriptor by iommu-unmapping the data buffer and passing
+ * the packet up to the stack
+ */
+static int gelic_card_decode_one_descr(struct gelic_card *card)
+{
+	enum gelic_descr_dma_status status;
+	struct gelic_descr_chain *chain = &card->rx_chain;
+	struct gelic_descr *descr = chain->head;
+	struct net_device *netdev = NULL;
+	int dmac_chain_ended;
+
+	status = gelic_descr_get_status(descr);
+
+	if (status == GELIC_DESCR_DMA_CARDOWNED)
+		return 0;
+
+	if (status == GELIC_DESCR_DMA_NOT_IN_USE) {
+		dev_dbg(ctodev(card), "dormant descr? %p\n", descr);
+		return 0;
+	}
+
+	/* netdevice select */
+	if (card->vlan_required) {
+		unsigned int i;
+		u16 vid;
+		vid = *(u16 *)(descr->skb->data) & VLAN_VID_MASK;
+		for (i = 0; i < GELIC_PORT_MAX; i++) {
+			if (card->vlan[i].rx == vid) {
+				netdev = card->netdev[i];
+				break;
+			}
+		}
+		if (GELIC_PORT_MAX <= i) {
+			pr_info("%s: unknown packet vid=%x\n", __func__, vid);
+			goto refill;
+		}
+	} else
+		netdev = card->netdev[GELIC_PORT_ETHERNET_0];
+
+	if ((status == GELIC_DESCR_DMA_RESPONSE_ERROR) ||
+	    (status == GELIC_DESCR_DMA_PROTECTION_ERROR) ||
+	    (status == GELIC_DESCR_DMA_FORCE_END)) {
+		dev_info(ctodev(card), "dropping RX descriptor with state %x\n",
+			 status);
+		netdev->stats.rx_dropped++;
+		goto refill;
+	}
+
+	if (status == GELIC_DESCR_DMA_BUFFER_FULL) {
+		/*
+		 * Buffer full would occur if and only if
+		 * the frame length was longer than the size of this
+		 * descriptor's buffer.  If the frame length was equal
+		 * to or shorter than buffer'size, FRAME_END condition
+		 * would occur.
+		 * Anyway this frame was longer than the MTU,
+		 * just drop it.
+		 */
+		dev_info(ctodev(card), "overlength frame\n");
+		goto refill;
+	}
+	/*
+	 * descriptors any other than FRAME_END here should
+	 * be treated as error.
+	 */
+	if (status != GELIC_DESCR_DMA_FRAME_END) {
+		dev_dbg(ctodev(card), "RX descriptor with state %x\n",
+			status);
+		goto refill;
+	}
+
+	/* ok, we've got a packet in descr */
+	gelic_net_pass_skb_up(descr, card, netdev);
+refill:
+
+	/* is the current descriptor terminated with next_descr == NULL? */
+	dmac_chain_ended =
+		be32_to_cpu(descr->dmac_cmd_status) &
+		GELIC_DESCR_RX_DMA_CHAIN_END;
+	/*
+	 * So that always DMAC can see the end
+	 * of the descriptor chain to avoid
+	 * from unwanted DMAC overrun.
+	 */
+	descr->next_descr_addr = 0;
+
+	/* change the descriptor state: */
+	gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
+
+	/*
+	 * this call can fail, but for now, just leave this
+	 * descriptor without skb
+	 */
+	gelic_descr_prepare_rx(card, descr);
+
+	chain->tail = descr;
+	chain->head = descr->next;
+
+	/*
+	 * Set this descriptor the end of the chain.
+	 */
+	descr->prev->next_descr_addr = cpu_to_be32(descr->bus_addr);
+
+	/*
+	 * If dmac chain was met, DMAC stopped.
+	 * thus re-enable it
+	 */
+
+	if (dmac_chain_ended)
+		gelic_card_enable_rxdmac(card);
+
+	return 1;
+}
+
+/**
+ * gelic_net_poll - NAPI poll function called by the stack to return packets
+ * @napi: napi structure
+ * @budget: number of packets we can pass to the stack at most
+ *
+ * returns the number of the processed packets
+ *
+ */
+static int gelic_net_poll(struct napi_struct *napi, int budget)
+{
+	struct gelic_card *card = container_of(napi, struct gelic_card, napi);
+	int packets_done = 0;
+
+	while (packets_done < budget) {
+		if (!gelic_card_decode_one_descr(card))
+			break;
+
+		packets_done++;
+	}
+
+	if (packets_done < budget) {
+		napi_complete_done(napi, packets_done);
+		gelic_card_rx_irq_on(card);
+	}
+	return packets_done;
+}
+
+/*
+ * gelic_card_interrupt - event handler for gelic_net
+ */
+static irqreturn_t gelic_card_interrupt(int irq, void *ptr)
+{
+	unsigned long flags;
+	struct gelic_card *card = ptr;
+	u64 status;
+
+	status = card->irq_status;
+
+	if (!status)
+		return IRQ_NONE;
+
+	status &= card->irq_mask;
+
+	if (status & GELIC_CARD_RXINT) {
+		gelic_card_rx_irq_off(card);
+		napi_schedule(&card->napi);
+	}
+
+	if (status & GELIC_CARD_TXINT) {
+		spin_lock_irqsave(&card->tx_lock, flags);
+		card->tx_dma_progress = 0;
+		gelic_card_release_tx_chain(card, 0);
+		/* kick outstanding tx descriptor if any */
+		gelic_card_kick_txdma(card, card->tx_chain.tail);
+		spin_unlock_irqrestore(&card->tx_lock, flags);
+	}
+
+	/* ether port status changed */
+	if (status & GELIC_CARD_PORT_STATUS_CHANGED)
+		gelic_card_get_ether_port_status(card, 1);
+
+#ifdef CONFIG_GELIC_WIRELESS
+	if (status & (GELIC_CARD_WLAN_EVENT_RECEIVED |
+		      GELIC_CARD_WLAN_COMMAND_COMPLETED))
+		gelic_wl_interrupt(card->netdev[GELIC_PORT_WIRELESS], status);
+#endif
+
+	return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+/**
+ * gelic_net_poll_controller - artificial interrupt for netconsole etc.
+ * @netdev: interface device structure
+ *
+ * see Documentation/networking/netconsole.rst
+ */
+void gelic_net_poll_controller(struct net_device *netdev)
+{
+	struct gelic_card *card = netdev_card(netdev);
+
+	gelic_card_set_irq_mask(card, 0);
+	gelic_card_interrupt(netdev->irq, netdev);
+	gelic_card_set_irq_mask(card, card->irq_mask);
+}
+#endif /* CONFIG_NET_POLL_CONTROLLER */
+
+/**
+ * gelic_net_open - called upon ifconfig up
+ * @netdev: interface device structure
+ *
+ * returns 0 on success, <0 on failure
+ *
+ * gelic_net_open allocates all the descriptors and memory needed for
+ * operation, sets up multicast list and enables interrupts
+ */
+int gelic_net_open(struct net_device *netdev)
+{
+	struct gelic_card *card = netdev_card(netdev);
+
+	dev_dbg(ctodev(card), " -> %s %p\n", __func__, netdev);
+
+	gelic_card_up(card);
+
+	netif_start_queue(netdev);
+	gelic_card_get_ether_port_status(card, 1);
+
+	dev_dbg(ctodev(card), " <- %s\n", __func__);
+	return 0;
+}
+
+void gelic_net_get_drvinfo(struct net_device *netdev,
+			   struct ethtool_drvinfo *info)
+{
+	strscpy(info->driver, DRV_NAME, sizeof(info->driver));
+	strscpy(info->version, DRV_VERSION, sizeof(info->version));
+}
+
+static int gelic_ether_get_link_ksettings(struct net_device *netdev,
+					  struct ethtool_link_ksettings *cmd)
+{
+	struct gelic_card *card = netdev_card(netdev);
+	u32 supported, advertising;
+
+	gelic_card_get_ether_port_status(card, 0);
+
+	if (card->ether_port_status & GELIC_LV1_ETHER_FULL_DUPLEX)
+		cmd->base.duplex = DUPLEX_FULL;
+	else
+		cmd->base.duplex = DUPLEX_HALF;
+
+	switch (card->ether_port_status & GELIC_LV1_ETHER_SPEED_MASK) {
+	case GELIC_LV1_ETHER_SPEED_10:
+		cmd->base.speed = SPEED_10;
+		break;
+	case GELIC_LV1_ETHER_SPEED_100:
+		cmd->base.speed = SPEED_100;
+		break;
+	case GELIC_LV1_ETHER_SPEED_1000:
+		cmd->base.speed = SPEED_1000;
+		break;
+	default:
+		pr_info("%s: speed unknown\n", __func__);
+		cmd->base.speed = SPEED_10;
+		break;
+	}
+
+	supported = SUPPORTED_TP | SUPPORTED_Autoneg |
+			SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
+			SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
+			SUPPORTED_1000baseT_Full;
+	advertising = supported;
+	if (card->link_mode & GELIC_LV1_ETHER_AUTO_NEG) {
+		cmd->base.autoneg = AUTONEG_ENABLE;
+	} else {
+		cmd->base.autoneg = AUTONEG_DISABLE;
+		advertising &= ~ADVERTISED_Autoneg;
+	}
+	cmd->base.port = PORT_TP;
+
+	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
+						supported);
+	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
+						advertising);
+
+	return 0;
+}
+
+static int
+gelic_ether_set_link_ksettings(struct net_device *netdev,
+			       const struct ethtool_link_ksettings *cmd)
+{
+	struct gelic_card *card = netdev_card(netdev);
+	u64 mode;
+	int ret;
+
+	if (cmd->base.autoneg == AUTONEG_ENABLE) {
+		mode = GELIC_LV1_ETHER_AUTO_NEG;
+	} else {
+		switch (cmd->base.speed) {
+		case SPEED_10:
+			mode = GELIC_LV1_ETHER_SPEED_10;
+			break;
+		case SPEED_100:
+			mode = GELIC_LV1_ETHER_SPEED_100;
+			break;
+		case SPEED_1000:
+			mode = GELIC_LV1_ETHER_SPEED_1000;
+			break;
+		default:
+			return -EINVAL;
+		}
+		if (cmd->base.duplex == DUPLEX_FULL) {
+			mode |= GELIC_LV1_ETHER_FULL_DUPLEX;
+		} else if (cmd->base.speed == SPEED_1000) {
+			pr_info("1000 half duplex is not supported.\n");
+			return -EINVAL;
+		}
+	}
+
+	ret = gelic_card_set_link_mode(card, mode);
+
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static void gelic_net_get_wol(struct net_device *netdev,
+			      struct ethtool_wolinfo *wol)
+{
+	if (0 <= ps3_compare_firmware_version(2, 2, 0))
+		wol->supported = WAKE_MAGIC;
+	else
+		wol->supported = 0;
+
+	wol->wolopts = ps3_sys_manager_get_wol() ? wol->supported : 0;
+	memset(&wol->sopass, 0, sizeof(wol->sopass));
+}
+static int gelic_net_set_wol(struct net_device *netdev,
+			     struct ethtool_wolinfo *wol)
+{
+	int status;
+	struct gelic_card *card;
+	u64 v1, v2;
+
+	if (ps3_compare_firmware_version(2, 2, 0) < 0 ||
+	    !capable(CAP_NET_ADMIN))
+		return -EPERM;
+
+	if (wol->wolopts & ~WAKE_MAGIC)
+		return -EINVAL;
+
+	card = netdev_card(netdev);
+	if (wol->wolopts & WAKE_MAGIC) {
+		status = lv1_net_control(bus_id(card), dev_id(card),
+					 GELIC_LV1_SET_WOL,
+					 GELIC_LV1_WOL_MAGIC_PACKET,
+					 0, GELIC_LV1_WOL_MP_ENABLE,
+					 &v1, &v2);
+		if (status) {
+			pr_info("%s: enabling WOL failed %d\n", __func__,
+				status);
+			status = -EIO;
+			goto done;
+		}
+		status = lv1_net_control(bus_id(card), dev_id(card),
+					 GELIC_LV1_SET_WOL,
+					 GELIC_LV1_WOL_ADD_MATCH_ADDR,
+					 0, GELIC_LV1_WOL_MATCH_ALL,
+					 &v1, &v2);
+		if (!status)
+			ps3_sys_manager_set_wol(1);
+		else {
+			pr_info("%s: enabling WOL filter failed %d\n",
+				__func__, status);
+			status = -EIO;
+		}
+	} else {
+		status = lv1_net_control(bus_id(card), dev_id(card),
+					 GELIC_LV1_SET_WOL,
+					 GELIC_LV1_WOL_MAGIC_PACKET,
+					 0, GELIC_LV1_WOL_MP_DISABLE,
+					 &v1, &v2);
+		if (status) {
+			pr_info("%s: disabling WOL failed %d\n", __func__,
+				status);
+			status = -EIO;
+			goto done;
+		}
+		status = lv1_net_control(bus_id(card), dev_id(card),
+					 GELIC_LV1_SET_WOL,
+					 GELIC_LV1_WOL_DELETE_MATCH_ADDR,
+					 0, GELIC_LV1_WOL_MATCH_ALL,
+					 &v1, &v2);
+		if (!status)
+			ps3_sys_manager_set_wol(0);
+		else {
+			pr_info("%s: removing WOL filter failed %d\n",
+				__func__, status);
+			status = -EIO;
+		}
+	}
+done:
+	return status;
+}
+
+static const struct ethtool_ops gelic_ether_ethtool_ops = {
+	.get_drvinfo	= gelic_net_get_drvinfo,
+	.get_link	= ethtool_op_get_link,
+	.get_wol	= gelic_net_get_wol,
+	.set_wol	= gelic_net_set_wol,
+	.get_link_ksettings = gelic_ether_get_link_ksettings,
+	.set_link_ksettings = gelic_ether_set_link_ksettings,
+};
+
+/**
+ * gelic_net_tx_timeout_task - task scheduled by the watchdog timeout
+ * function (to be called not under interrupt status)
+ * @work: work is context of tx timout task
+ *
+ * called as task when tx hangs, resets interface (if interface is up)
+ */
+static void gelic_net_tx_timeout_task(struct work_struct *work)
+{
+	struct gelic_card *card =
+		container_of(work, struct gelic_card, tx_timeout_task);
+	struct net_device *netdev = card->netdev[GELIC_PORT_ETHERNET_0];
+
+	dev_info(ctodev(card), "%s:Timed out. Restarting...\n", __func__);
+
+	if (!(netdev->flags & IFF_UP))
+		goto out;
+
+	netif_device_detach(netdev);
+	gelic_net_stop(netdev);
+
+	gelic_net_open(netdev);
+	netif_device_attach(netdev);
+
+out:
+	atomic_dec(&card->tx_timeout_task_counter);
+}
+
+/**
+ * gelic_net_tx_timeout - called when the tx timeout watchdog kicks in.
+ * @netdev: interface device structure
+ * @txqueue: unused
+ *
+ * called, if tx hangs. Schedules a task that resets the interface
+ */
+void gelic_net_tx_timeout(struct net_device *netdev, unsigned int txqueue)
+{
+	struct gelic_card *card;
+
+	card = netdev_card(netdev);
+	atomic_inc(&card->tx_timeout_task_counter);
+	if (netdev->flags & IFF_UP)
+		schedule_work(&card->tx_timeout_task);
+	else
+		atomic_dec(&card->tx_timeout_task_counter);
+}
+
+static const struct net_device_ops gelic_netdevice_ops = {
+	.ndo_open = gelic_net_open,
+	.ndo_stop = gelic_net_stop,
+	.ndo_start_xmit = gelic_net_xmit,
+	.ndo_set_rx_mode = gelic_net_set_multi,
+	.ndo_tx_timeout = gelic_net_tx_timeout,
+	.ndo_set_mac_address = eth_mac_addr,
+	.ndo_validate_addr = eth_validate_addr,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	.ndo_poll_controller = gelic_net_poll_controller,
+#endif
+};
+
+/**
+ * gelic_ether_setup_netdev_ops - initialization of net_device operations
+ * @netdev: net_device structure
+ * @napi: napi structure
+ *
+ * fills out function pointers in the net_device structure
+ */
+static void gelic_ether_setup_netdev_ops(struct net_device *netdev,
+					 struct napi_struct *napi)
+{
+	netdev->watchdog_timeo = GELIC_NET_WATCHDOG_TIMEOUT;
+	/* NAPI */
+	netif_napi_add(netdev, napi, gelic_net_poll);
+	netdev->ethtool_ops = &gelic_ether_ethtool_ops;
+	netdev->netdev_ops = &gelic_netdevice_ops;
+}
+
+/**
+ * gelic_ether_setup_netdev - initialization of net_device
+ * @netdev: net_device structure
+ * @card: card structure
+ *
+ * Returns 0 on success or <0 on failure
+ *
+ * gelic_ether_setup_netdev initializes the net_device structure
+ * and register it.
+ **/
+int gelic_net_setup_netdev(struct net_device *netdev, struct gelic_card *card)
+{
+	int status;
+	u64 v1, v2;
+
+	netdev->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
+
+	netdev->features = NETIF_F_IP_CSUM;
+	if (GELIC_CARD_RX_CSUM_DEFAULT)
+		netdev->features |= NETIF_F_RXCSUM;
+
+	status = lv1_net_control(bus_id(card), dev_id(card),
+				 GELIC_LV1_GET_MAC_ADDRESS,
+				 0, 0, 0, &v1, &v2);
+	v1 <<= 16;
+	if (status || !is_valid_ether_addr((u8 *)&v1)) {
+		dev_info(ctodev(card),
+			 "%s:lv1_net_control GET_MAC_ADDR failed %d\n",
+			 __func__, status);
+		return -EINVAL;
+	}
+	eth_hw_addr_set(netdev, (u8 *)&v1);
+
+	if (card->vlan_required) {
+		netdev->hard_header_len += VLAN_HLEN;
+		/*
+		 * As vlan is internally used,
+		 * we can not receive vlan packets
+		 */
+		netdev->features |= NETIF_F_VLAN_CHALLENGED;
+	}
+
+	/* MTU range: 64 - 1518 */
+	netdev->min_mtu = GELIC_NET_MIN_MTU;
+	netdev->max_mtu = GELIC_NET_MAX_MTU;
+
+	status = register_netdev(netdev);
+	if (status) {
+		dev_err(ctodev(card), "%s:Couldn't register %s %d\n",
+			__func__, netdev->name, status);
+		return status;
+	}
+	dev_info(ctodev(card), "%s: MAC addr %pM\n",
+		 netdev->name, netdev->dev_addr);
+
+	return 0;
+}
+
+/**
+ * gelic_alloc_card_net - allocates net_device and card structure
+ *
+ * returns the card structure or NULL in case of errors
+ *
+ * the card and net_device structures are linked to each other
+ */
+#define GELIC_ALIGN (32)
+static struct gelic_card *gelic_alloc_card_net(struct net_device **netdev)
+{
+	struct gelic_card *card;
+	struct gelic_port *port;
+	void *p;
+	size_t alloc_size;
+	/*
+	 * gelic requires dma descriptor is 32 bytes aligned and
+	 * the hypervisor requires irq_status is 8 bytes aligned.
+	 */
+	BUILD_BUG_ON(offsetof(struct gelic_card, irq_status) % 8);
+	BUILD_BUG_ON(offsetof(struct gelic_card, descr) % 32);
+	alloc_size =
+		sizeof(struct gelic_card) +
+		sizeof(struct gelic_descr) * GELIC_NET_RX_DESCRIPTORS +
+		sizeof(struct gelic_descr) * GELIC_NET_TX_DESCRIPTORS +
+		GELIC_ALIGN - 1;
+
+	p  = kzalloc(alloc_size, GFP_KERNEL);
+	if (!p)
+		return NULL;
+	card = PTR_ALIGN(p, GELIC_ALIGN);
+	card->unalign = p;
+
+	/*
+	 * alloc netdev
+	 */
+	*netdev = alloc_etherdev(sizeof(struct gelic_port));
+	if (!*netdev) {
+		kfree(card->unalign);
+		return NULL;
+	}
+	port = netdev_priv(*netdev);
+
+	/* gelic_port */
+	port->netdev = *netdev;
+	port->card = card;
+	port->type = GELIC_PORT_ETHERNET_0;
+
+	/* gelic_card */
+	card->netdev[GELIC_PORT_ETHERNET_0] = *netdev;
+
+	INIT_WORK(&card->tx_timeout_task, gelic_net_tx_timeout_task);
+	init_waitqueue_head(&card->waitq);
+	atomic_set(&card->tx_timeout_task_counter, 0);
+	mutex_init(&card->updown_lock);
+	atomic_set(&card->users, 0);
+
+	return card;
+}
+
+static void gelic_card_get_vlan_info(struct gelic_card *card)
+{
+	u64 v1, v2;
+	int status;
+	unsigned int i;
+	struct {
+		int tx;
+		int rx;
+	} vlan_id_ix[2] = {
+		[GELIC_PORT_ETHERNET_0] = {
+			.tx = GELIC_LV1_VLAN_TX_ETHERNET_0,
+			.rx = GELIC_LV1_VLAN_RX_ETHERNET_0
+		},
+		[GELIC_PORT_WIRELESS] = {
+			.tx = GELIC_LV1_VLAN_TX_WIRELESS,
+			.rx = GELIC_LV1_VLAN_RX_WIRELESS
+		}
+	};
+
+	for (i = 0; i < ARRAY_SIZE(vlan_id_ix); i++) {
+		/* tx tag */
+		status = lv1_net_control(bus_id(card), dev_id(card),
+					 GELIC_LV1_GET_VLAN_ID,
+					 vlan_id_ix[i].tx,
+					 0, 0, &v1, &v2);
+		if (status || !v1) {
+			if (status != LV1_NO_ENTRY)
+				dev_dbg(ctodev(card),
+					"get vlan id for tx(%d) failed(%d)\n",
+					vlan_id_ix[i].tx, status);
+			card->vlan[i].tx = 0;
+			card->vlan[i].rx = 0;
+			continue;
+		}
+		card->vlan[i].tx = (u16)v1;
+
+		/* rx tag */
+		status = lv1_net_control(bus_id(card), dev_id(card),
+					 GELIC_LV1_GET_VLAN_ID,
+					 vlan_id_ix[i].rx,
+					 0, 0, &v1, &v2);
+		if (status || !v1) {
+			if (status != LV1_NO_ENTRY)
+				dev_info(ctodev(card),
+					 "get vlan id for rx(%d) failed(%d)\n",
+					 vlan_id_ix[i].rx, status);
+			card->vlan[i].tx = 0;
+			card->vlan[i].rx = 0;
+			continue;
+		}
+		card->vlan[i].rx = (u16)v1;
+
+		dev_dbg(ctodev(card), "vlan_id[%d] tx=%02x rx=%02x\n",
+			i, card->vlan[i].tx, card->vlan[i].rx);
+	}
+
+	if (card->vlan[GELIC_PORT_ETHERNET_0].tx) {
+		BUG_ON(!card->vlan[GELIC_PORT_WIRELESS].tx);
+		card->vlan_required = 1;
+	} else
+		card->vlan_required = 0;
+
+	/* check wirelss capable firmware */
+	if (ps3_compare_firmware_version(1, 6, 0) < 0) {
+		card->vlan[GELIC_PORT_WIRELESS].tx = 0;
+		card->vlan[GELIC_PORT_WIRELESS].rx = 0;
+	}
+
+	dev_info(ctodev(card), "internal vlan %s\n",
+		 card->vlan_required? "enabled" : "disabled");
+}
+/*
+ * ps3_gelic_driver_probe - add a device to the control of this driver
+ */
+static int ps3_gelic_driver_probe(struct ps3_system_bus_device *dev)
+{
+	struct gelic_card *card;
+	struct net_device *netdev;
+	int result;
+
+	pr_debug("%s: called\n", __func__);
+
+	udbg_shutdown_ps3gelic();
+
+	result = ps3_open_hv_device(dev);
+
+	if (result) {
+		dev_dbg(&dev->core, "%s:ps3_open_hv_device failed\n",
+			__func__);
+		goto fail_open;
+	}
+
+	result = ps3_dma_region_create(dev->d_region);
+
+	if (result) {
+		dev_dbg(&dev->core, "%s:ps3_dma_region_create failed(%d)\n",
+			__func__, result);
+		BUG_ON("check region type");
+		goto fail_dma_region;
+	}
+
+	/* alloc card/netdevice */
+	card = gelic_alloc_card_net(&netdev);
+	if (!card) {
+		dev_info(&dev->core, "%s:gelic_net_alloc_card failed\n",
+			 __func__);
+		result = -ENOMEM;
+		goto fail_alloc_card;
+	}
+	ps3_system_bus_set_drvdata(dev, card);
+	card->dev = dev;
+
+	/* get internal vlan info */
+	gelic_card_get_vlan_info(card);
+
+	card->link_mode = GELIC_LV1_ETHER_AUTO_NEG;
+
+	/* setup interrupt */
+	result = lv1_net_set_interrupt_status_indicator(bus_id(card),
+							dev_id(card),
+		ps3_mm_phys_to_lpar(__pa(&card->irq_status)),
+		0);
+
+	if (result) {
+		dev_dbg(&dev->core,
+			"%s:set_interrupt_status_indicator failed: %s\n",
+			__func__, ps3_result(result));
+		result = -EIO;
+		goto fail_status_indicator;
+	}
+
+	result = ps3_sb_event_receive_port_setup(dev, PS3_BINDING_CPU_ANY,
+		&card->irq);
+
+	if (result) {
+		dev_info(ctodev(card),
+			 "%s:gelic_net_open_device failed (%d)\n",
+			 __func__, result);
+		result = -EPERM;
+		goto fail_alloc_irq;
+	}
+	result = request_irq(card->irq, gelic_card_interrupt,
+			     0, netdev->name, card);
+
+	if (result) {
+		dev_info(ctodev(card), "%s:request_irq failed (%d)\n",
+			__func__, result);
+		goto fail_request_irq;
+	}
+
+	/* setup card structure */
+	card->irq_mask = GELIC_CARD_RXINT | GELIC_CARD_TXINT |
+		GELIC_CARD_PORT_STATUS_CHANGED;
+
+
+	result = gelic_card_init_chain(card, &card->tx_chain,
+				       card->descr, GELIC_NET_TX_DESCRIPTORS);
+	if (result)
+		goto fail_alloc_tx;
+	result = gelic_card_init_chain(card, &card->rx_chain,
+				       card->descr + GELIC_NET_TX_DESCRIPTORS,
+				       GELIC_NET_RX_DESCRIPTORS);
+	if (result)
+		goto fail_alloc_rx;
+
+	/* head of chain */
+	card->tx_top = card->tx_chain.head;
+	card->rx_top = card->rx_chain.head;
+	dev_dbg(ctodev(card), "descr rx %p, tx %p, size %#lx, num %#x\n",
+		card->rx_top, card->tx_top, sizeof(struct gelic_descr),
+		GELIC_NET_RX_DESCRIPTORS);
+	/* allocate rx skbs */
+	result = gelic_card_alloc_rx_skbs(card);
+	if (result)
+		goto fail_alloc_skbs;
+
+	spin_lock_init(&card->tx_lock);
+	card->tx_dma_progress = 0;
+
+	/* setup net_device structure */
+	netdev->irq = card->irq;
+	SET_NETDEV_DEV(netdev, &card->dev->core);
+	gelic_ether_setup_netdev_ops(netdev, &card->napi);
+	result = gelic_net_setup_netdev(netdev, card);
+	if (result) {
+		dev_dbg(&dev->core, "%s: setup_netdev failed %d\n",
+			__func__, result);
+		goto fail_setup_netdev;
+	}
+
+#ifdef CONFIG_GELIC_WIRELESS
+	result = gelic_wl_driver_probe(card);
+	if (result) {
+		dev_dbg(&dev->core, "%s: WL init failed\n", __func__);
+		goto fail_setup_netdev;
+	}
+#endif
+	pr_debug("%s: done\n", __func__);
+	return 0;
+
+fail_setup_netdev:
+fail_alloc_skbs:
+	gelic_card_free_chain(card, card->rx_chain.head);
+fail_alloc_rx:
+	gelic_card_free_chain(card, card->tx_chain.head);
+fail_alloc_tx:
+	free_irq(card->irq, card);
+	netdev->irq = 0;
+fail_request_irq:
+	ps3_sb_event_receive_port_destroy(dev, card->irq);
+fail_alloc_irq:
+	lv1_net_set_interrupt_status_indicator(bus_id(card),
+					       bus_id(card),
+					       0, 0);
+fail_status_indicator:
+	ps3_system_bus_set_drvdata(dev, NULL);
+	kfree(netdev_card(netdev)->unalign);
+	free_netdev(netdev);
+fail_alloc_card:
+	ps3_dma_region_free(dev->d_region);
+fail_dma_region:
+	ps3_close_hv_device(dev);
+fail_open:
+	return result;
+}
+
+/*
+ * ps3_gelic_driver_remove - remove a device from the control of this driver
+ */
+
+static void ps3_gelic_driver_remove(struct ps3_system_bus_device *dev)
+{
+	struct gelic_card *card = ps3_system_bus_get_drvdata(dev);
+	struct net_device *netdev0;
+	pr_debug("%s: called\n", __func__);
+
+	/* set auto-negotiation */
+	gelic_card_set_link_mode(card, GELIC_LV1_ETHER_AUTO_NEG);
+
+#ifdef CONFIG_GELIC_WIRELESS
+	gelic_wl_driver_remove(card);
+#endif
+	/* stop interrupt */
+	gelic_card_set_irq_mask(card, 0);
+
+	/* turn off DMA, force end */
+	gelic_card_disable_rxdmac(card);
+	gelic_card_disable_txdmac(card);
+
+	/* release chains */
+	gelic_card_release_tx_chain(card, 1);
+	gelic_card_release_rx_chain(card);
+
+	gelic_card_free_chain(card, card->tx_top);
+	gelic_card_free_chain(card, card->rx_top);
+
+	netdev0 = card->netdev[GELIC_PORT_ETHERNET_0];
+	/* disconnect event port */
+	free_irq(card->irq, card);
+	netdev0->irq = 0;
+	ps3_sb_event_receive_port_destroy(card->dev, card->irq);
+
+	wait_event(card->waitq,
+		   atomic_read(&card->tx_timeout_task_counter) == 0);
+
+	lv1_net_set_interrupt_status_indicator(bus_id(card), dev_id(card),
+					       0 , 0);
+
+	unregister_netdev(netdev0);
+	kfree(netdev_card(netdev0)->unalign);
+	free_netdev(netdev0);
+
+	ps3_system_bus_set_drvdata(dev, NULL);
+
+	ps3_dma_region_free(dev->d_region);
+
+	ps3_close_hv_device(dev);
+
+	pr_debug("%s: done\n", __func__);
+}
+
+static struct ps3_system_bus_driver ps3_gelic_driver = {
+	.match_id = PS3_MATCH_ID_GELIC,
+	.probe = ps3_gelic_driver_probe,
+	.remove = ps3_gelic_driver_remove,
+	.shutdown = ps3_gelic_driver_remove,
+	.core.name = "ps3_gelic_driver",
+	.core.owner = THIS_MODULE,
+};
+
+static int __init ps3_gelic_driver_init (void)
+{
+	return firmware_has_feature(FW_FEATURE_PS3_LV1)
+		? ps3_system_bus_driver_register(&ps3_gelic_driver)
+		: -ENODEV;
+}
+
+static void __exit ps3_gelic_driver_exit (void)
+{
+	ps3_system_bus_driver_unregister(&ps3_gelic_driver);
+}
+
+module_init(ps3_gelic_driver_init);
+module_exit(ps3_gelic_driver_exit);
+
+MODULE_ALIAS(PS3_MODULE_ALIAS_GELIC);
+