ps3: gigabit ethernet driver for PS3, take3

Hi,

This is the third submission of the network driver for PS3.
The differences from the previous one are:

  - renamed source file names so that their prefix can match
    with the module name
  - added cbe-oss-dev@ozlabs.org line for MAINTAINER file
  - changed some in copyright comments

If there are no more comments, please apply for 2.6.23.

Thank you

--
Subject: PS3: Ethernet driver

From: Masakazu Mokuno <mokuno@sm.sony.co.jp>

Add Gigabit Ethernet support for the PS3 game console.  The module will
be called ps3_gelic.

CC: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Masakazu Mokuno <mokuno@sm.sony.co.jp>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

4 files changed, 1827 insertions, 0 deletions

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index a64c2fb..ec84684 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -2200,6 +2200,16 @@ config TSI108_ETH
 	     To compile this driver as a module, choose M here: the module
 	     will be called tsi108_eth.
 
+config GELIC_NET
+	tristate "PS3 Gigabit Ethernet driver"
+	depends on PPC_PS3
+	help
+	  This driver supports the network device on the PS3 game
+	  console.  This driver has built-in support for Ethernet.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ps3_gelic.
+
 config GIANFAR
 	tristate "Gianfar Ethernet"
 	depends on 85xx || 83xx || PPC_86xx
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 77bd822..1bbcbed 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -60,6 +60,8 @@ obj-$(CONFIG_TIGON3) += tg3.o
 obj-$(CONFIG_BNX2) += bnx2.o
 spidernet-y += spider_net.o spider_net_ethtool.o
 obj-$(CONFIG_SPIDER_NET) += spidernet.o sungem_phy.o
+obj-$(CONFIG_GELIC_NET) += ps3_gelic.o
+ps3_gelic-objs += ps3_gelic_net.o
 obj-$(CONFIG_TC35815) += tc35815.o
 obj-$(CONFIG_SKGE) += skge.o
 obj-$(CONFIG_SKY2) += sky2.o
diff --git a/drivers/net/ps3_gelic_net.c b/drivers/net/ps3_gelic_net.c
new file mode 100644
index 0000000..08d2506
--- /dev/null
+++ b/drivers/net/ps3_gelic_net.c
@@ -0,0 +1,1576 @@
+/*
+ *  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>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#undef DEBUG
+
+#include <linux/kernel.h>
+#include <linux/module.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"
+
+#define DRV_NAME "Gelic Network Driver"
+#define DRV_VERSION "1.0"
+
+MODULE_AUTHOR("SCE Inc.");
+MODULE_DESCRIPTION("Gelic Network driver");
+MODULE_LICENSE("GPL");
+
+static inline struct device *ctodev(struct gelic_net_card *card)
+{
+	return &card->dev->core;
+}
+static inline unsigned int bus_id(struct gelic_net_card *card)
+{
+	return card->dev->bus_id;
+}
+static inline unsigned int dev_id(struct gelic_net_card *card)
+{
+	return card->dev->dev_id;
+}
+
+/* set irq_mask */
+static int gelic_net_set_irq_mask(struct gelic_net_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),
+			 "lv1_net_set_interrupt_mask failed %d\n", status);
+	return status;
+}
+static inline void gelic_net_rx_irq_on(struct gelic_net_card *card)
+{
+	gelic_net_set_irq_mask(card, card->ghiintmask | GELIC_NET_RXINT);
+}
+static inline void gelic_net_rx_irq_off(struct gelic_net_card *card)
+{
+	gelic_net_set_irq_mask(card, card->ghiintmask & ~GELIC_NET_RXINT);
+}
+/**
+ * gelic_net_get_descr_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_net_descr_status
+gelic_net_get_descr_status(struct gelic_net_descr *descr)
+{
+	u32 cmd_status;
+
+	cmd_status = descr->dmac_cmd_status;
+	cmd_status >>= GELIC_NET_DESCR_IND_PROC_SHIFT;
+	return cmd_status;
+}
+
+/**
+ * gelic_net_set_descr_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_net_set_descr_status(struct gelic_net_descr *descr,
+				       enum gelic_net_descr_status status)
+{
+	u32 cmd_status;
+
+	/* read the status */
+	cmd_status = descr->dmac_cmd_status;
+	/* clean the upper 4 bits */
+	cmd_status &= GELIC_NET_DESCR_IND_PROC_MASKO;
+	/* add the status to it */
+	cmd_status |= ((u32)status) << GELIC_NET_DESCR_IND_PROC_SHIFT;
+	/* and write it back */
+	descr->dmac_cmd_status = cmd_status;
+	/*
+	 * 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_net_free_chain - free descriptor chain
+ * @card: card structure
+ * @descr_in: address of desc
+ */
+static void gelic_net_free_chain(struct gelic_net_card *card,
+				 struct gelic_net_descr *descr_in)
+{
+	struct gelic_net_descr *descr;
+
+	for (descr = descr_in; descr && descr->bus_addr; descr = descr->next) {
+		dma_unmap_single(ctodev(card), descr->bus_addr,
+				 GELIC_NET_DESCR_SIZE, DMA_BIDIRECTIONAL);
+		descr->bus_addr = 0;
+	}
+}
+
+/**
+ * gelic_net_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_net_init_chain(struct gelic_net_card *card,
+				struct gelic_net_descr_chain *chain,
+				struct gelic_net_descr *start_descr, int no)
+{
+	int i;
+	struct gelic_net_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++) {
+		gelic_net_set_descr_status(descr, GELIC_NET_DESCR_NOT_IN_USE);
+		descr->bus_addr =
+			dma_map_single(ctodev(card), descr,
+				       GELIC_NET_DESCR_SIZE,
+				       DMA_BIDIRECTIONAL);
+
+		if (!descr->bus_addr)
+			goto iommu_error;
+
+		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 = 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_NET_DESCR_SIZE,
+					 DMA_BIDIRECTIONAL);
+	return -ENOMEM;
+}
+
+/**
+ * gelic_net_prepare_rx_descr - reinitializes a rx descriptor
+ * @card: card structure
+ * @descr: descriptor to re-init
+ *
+ * return 0 on succes, <0 on failure
+ *
+ * allocates a new rx skb, iommu-maps it and attaches it to the descriptor.
+ * Activate the descriptor state-wise
+ */
+static int gelic_net_prepare_rx_descr(struct gelic_net_card *card,
+				      struct gelic_net_descr *descr)
+{
+	int offset;
+	unsigned int bufsize;
+
+	if (gelic_net_get_descr_status(descr) !=  GELIC_NET_DESCR_NOT_IN_USE) {
+		dev_info(ctodev(card), "%s: ERROR status \n", __func__);
+	}
+	/* we need to round up the buffer size to a multiple of 128 */
+	bufsize = ALIGN(GELIC_NET_MAX_MTU, GELIC_NET_RXBUF_ALIGN);
+
+	/* and we need to have it 128 byte aligned, therefore we allocate a
+	 * bit more */
+	descr->skb = netdev_alloc_skb(card->netdev,
+		bufsize + GELIC_NET_RXBUF_ALIGN - 1);
+	if (!descr->skb) {
+		descr->buf_addr = 0; /* tell DMAC don't touch memory */
+		dev_info(ctodev(card),
+			 "%s:allocate skb failed !!\n", __func__);
+		return -ENOMEM;
+	}
+	descr->buf_size = bufsize;
+	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 */
+	descr->buf_addr = dma_map_single(ctodev(card), descr->skb->data,
+					 GELIC_NET_MAX_MTU,
+					 DMA_FROM_DEVICE);
+	if (!descr->buf_addr) {
+		dev_kfree_skb_any(descr->skb);
+		descr->skb = NULL;
+		dev_info(ctodev(card),
+			 "%s:Could not iommu-map rx buffer\n", __func__);
+		gelic_net_set_descr_status(descr, GELIC_NET_DESCR_NOT_IN_USE);
+		return -ENOMEM;
+	} else {
+		gelic_net_set_descr_status(descr, GELIC_NET_DESCR_CARDOWNED);
+		return 0;
+	}
+}
+
+/**
+ * gelic_net_release_rx_chain - free all skb of rx descr
+ * @card: card structure
+ *
+ */
+static void gelic_net_release_rx_chain(struct gelic_net_card *card)
+{
+	struct gelic_net_descr *descr = card->rx_chain.head;
+
+	do {
+		if (descr->skb) {
+			dma_unmap_single(ctodev(card),
+					 descr->buf_addr,
+					 descr->skb->len,
+					 DMA_FROM_DEVICE);
+			descr->buf_addr = 0;
+			dev_kfree_skb_any(descr->skb);
+			descr->skb = NULL;
+			descr->dmac_cmd_status = GELIC_NET_DESCR_NOT_IN_USE;
+		}
+		descr = descr->next;
+	} while (descr != card->rx_chain.head);
+}
+
+/**
+ * gelic_net_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_net_fill_rx_chain(struct gelic_net_card *card)
+{
+	struct gelic_net_descr *descr = card->rx_chain.head;
+	int ret;
+
+	do {
+		if (!descr->skb) {
+			ret = gelic_net_prepare_rx_descr(card, descr);
+			if (ret)
+				goto rewind;
+		}
+		descr = descr->next;
+	} while (descr != card->rx_chain.head);
+
+	return 0;
+rewind:
+	gelic_net_release_rx_chain(card);
+	return ret;
+}
+
+/**
+ * gelic_net_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
+ * @card: card structure
+ *
+ * returns 0 on success, <0 on failure
+ */
+static int gelic_net_alloc_rx_skbs(struct gelic_net_card *card)
+{
+	struct gelic_net_descr_chain *chain;
+	int ret;
+	chain = &card->rx_chain;
+	ret = gelic_net_fill_rx_chain(card);
+	chain->head = card->rx_top->prev; /* point to the last */
+	return ret;
+}
+
+/**
+ * gelic_net_release_tx_descr - processes a used tx descriptor
+ * @card: card structure
+ * @descr: descriptor to release
+ *
+ * releases a used tx descriptor (unmapping, freeing of skb)
+ */
+static void gelic_net_release_tx_descr(struct gelic_net_card *card,
+			    struct gelic_net_descr *descr)
+{
+	struct sk_buff *skb;
+
+
+	if (descr->data_status & (1 << GELIC_NET_TXDESC_TAIL)) {
+		/* 2nd descriptor */
+		skb = descr->skb;
+		dma_unmap_single(ctodev(card), descr->buf_addr, skb->len,
+				 DMA_TO_DEVICE);
+		dev_kfree_skb_any(skb);
+	} else {
+		dma_unmap_single(ctodev(card), descr->buf_addr,
+				 descr->buf_size, DMA_TO_DEVICE);
+	}
+
+	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 */
+	descr->dmac_cmd_status = GELIC_NET_DMAC_CMDSTAT_NOT_IN_USE;
+}
+
+/**
+ * gelic_net_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_net_release_tx_chain(struct gelic_net_card *card, int stop)
+{
+	struct gelic_net_descr_chain *tx_chain;
+	enum gelic_net_descr_status status;
+	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_net_get_descr_status(tx_chain->tail);
+		switch (status) {
+		case GELIC_NET_DESCR_RESPONSE_ERROR:
+		case GELIC_NET_DESCR_PROTECTION_ERROR:
+		case GELIC_NET_DESCR_FORCE_END:
+			if (printk_ratelimit())
+				dev_info(ctodev(card),
+					 "%s: forcing end of tx descriptor " \
+					 "with status %x\n",
+					 __func__, status);
+			card->netdev_stats.tx_dropped++;
+			break;
+
+		case GELIC_NET_DESCR_COMPLETE:
+			card->netdev_stats.tx_packets++;
+			card->netdev_stats.tx_bytes +=
+				tx_chain->tail->skb->len;
+			break;
+
+		case GELIC_NET_DESCR_CARDOWNED:
+			/* pending tx request */
+		default:
+			/* any other value (== GELIC_NET_DESCR_NOT_IN_USE) */
+			goto out;
+		}
+		gelic_net_release_tx_descr(card, tx_chain->tail);
+		release = 1;
+	}
+out:
+	if (!stop && release)
+		netif_wake_queue(card->netdev);
+}
+
+/**
+ * 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
+ */
+static void gelic_net_set_multi(struct net_device *netdev)
+{
+	struct gelic_net_card *card = netdev_priv(netdev);
+	struct dev_mc_list *mc;
+	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 > GELIC_NET_MC_COUNT_MAX) { /* list 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 address */
+	for (mc = netdev->mc_list; mc; mc = mc->next) {
+		addr = 0;
+		p = mc->dmi_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_enable_rxdmac - enables the receive DMA controller
+ * @card: card structure
+ *
+ * gelic_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
+ * in the GDADMACCNTR register
+ */
+static inline void gelic_net_enable_rxdmac(struct gelic_net_card *card)
+{
+	int status;
+
+	status = lv1_net_start_rx_dma(bus_id(card), dev_id(card),
+				card->rx_chain.tail->bus_addr, 0);
+	if (status)
+		dev_info(ctodev(card),
+			 "lv1_net_start_rx_dma failed, status=%d\n", status);
+}
+
+/**
+ * gelic_net_disable_rxdmac - disables the receive DMA controller
+ * @card: card structure
+ *
+ * gelic_net_disable_rxdmac terminates processing on the DMA controller by
+ * turing off DMA and issueing a force end
+ */
+static inline void gelic_net_disable_rxdmac(struct gelic_net_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), 0);
+	if (status)
+		dev_err(ctodev(card),
+			"lv1_net_stop_rx_dma faild, %d\n", status);
+}
+
+/**
+ * gelic_net_disable_txdmac - disables the transmit DMA controller
+ * @card: card structure
+ *
+ * gelic_net_disable_txdmac terminates processing on the DMA controller by
+ * turing off DMA and issueing a force end
+ */
+static inline void gelic_net_disable_txdmac(struct gelic_net_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), 0);
+	if (status)
+		dev_err(ctodev(card),
+			"lv1_net_stop_tx_dma faild, status=%d\n", status);
+}
+
+/**
+ * gelic_net_stop - called upon ifconfig down
+ * @netdev: interface device structure
+ *
+ * always returns 0
+ */
+static int gelic_net_stop(struct net_device *netdev)
+{
+	struct gelic_net_card *card = netdev_priv(netdev);
+
+	netif_poll_disable(netdev);
+	netif_stop_queue(netdev);
+
+	/* turn off DMA, force end */
+	gelic_net_disable_rxdmac(card);
+	gelic_net_disable_txdmac(card);
+
+	gelic_net_set_irq_mask(card, 0);
+
+	/* disconnect event port */
+	free_irq(card->netdev->irq, card->netdev);
+	ps3_sb_event_receive_port_destroy(card->dev, card->netdev->irq);
+	card->netdev->irq = NO_IRQ;
+
+	netif_carrier_off(netdev);
+
+	/* release chains */
+	gelic_net_release_tx_chain(card, 1);
+	gelic_net_release_rx_chain(card);
+
+	gelic_net_free_chain(card, card->tx_top);
+	gelic_net_free_chain(card, card->rx_top);
+
+	return 0;
+}
+
+/**
+ * gelic_net_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_net_descr *
+gelic_net_get_next_tx_descr(struct gelic_net_card *card)
+{
+	if (!card->tx_chain.head)
+		return NULL;
+	/*  see if we can two consecutive free descrs */
+	if (card->tx_chain.tail != card->tx_chain.head->next &&
+	    gelic_net_get_descr_status(card->tx_chain.head) ==
+	    GELIC_NET_DESCR_NOT_IN_USE &&
+	    card->tx_chain.tail != card->tx_chain.head->next->next &&
+	    gelic_net_get_descr_status(card->tx_chain.head->next) ==
+	     GELIC_NET_DESCR_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
+ * @middle: middle of frame
+ *
+ * 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_net_set_txdescr_cmdstat(struct gelic_net_descr *descr,
+					  struct sk_buff *skb, int middle)
+{
+	u32 eofr;
+
+	if (middle)
+		eofr = 0;
+	else
+		eofr = GELIC_NET_DMAC_CMDSTAT_END_FRAME;
+
+	if (skb->ip_summed != CHECKSUM_PARTIAL)
+		descr->dmac_cmd_status = GELIC_NET_DMAC_CMDSTAT_NOCS | eofr;
+	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 =
+					GELIC_NET_DMAC_CMDSTAT_TCPCS | eofr;
+			else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
+				descr->dmac_cmd_status =
+					GELIC_NET_DMAC_CMDSTAT_UDPCS | eofr;
+			else	/*
+				 * the stack should checksum non-tcp and non-udp
+				 * packets on his own: NETIF_F_IP_CSUM
+				 */
+				descr->dmac_cmd_status =
+					GELIC_NET_DMAC_CMDSTAT_NOCS | eofr;
+		}
+	}
+}
+
+/**
+ * gelic_net_prepare_tx_descr_v - get dma address of skb_data
+ * @card: card structure
+ * @descr: descriptor structure
+ * @skb: packet to use
+ *
+ * returns 0 on success, <0 on failure.
+ *
+ */
+static int gelic_net_prepare_tx_descr_v(struct gelic_net_card *card,
+					struct gelic_net_descr *descr,
+					struct sk_buff *skb)
+{
+	dma_addr_t buf[2];
+	unsigned int vlan_len;
+
+	if (skb->len < GELIC_NET_VLAN_POS)
+		return -EINVAL;
+
+	memcpy(&descr->vlan, skb->data, GELIC_NET_VLAN_POS);
+	if (card->vlan_index != -1) {
+		descr->vlan.h_vlan_proto = htons(ETH_P_8021Q); /* vlan 0x8100*/
+		descr->vlan.h_vlan_TCI = htons(card->vlan_id[card->vlan_index]);
+		vlan_len = GELIC_NET_VLAN_POS + VLAN_HLEN; /* VLAN_HLEN=4 */
+	} else
+		vlan_len = GELIC_NET_VLAN_POS; /* no vlan tag */
+
+	/* first descr */
+	buf[0] = dma_map_single(ctodev(card), &descr->vlan,
+			     vlan_len, DMA_TO_DEVICE);
+
+	if (!buf[0]) {
+		dev_err(ctodev(card),
+			"dma map 1 failed (%p, %i). Dropping packet\n",
+			skb->data, vlan_len);
+		return -ENOMEM;
+	}
+
+	descr->buf_addr = buf[0];
+	descr->buf_size = vlan_len;
+	descr->skb = skb; /* not used */
+	descr->data_status = 0;
+	gelic_net_set_txdescr_cmdstat(descr, skb, 1); /* not the frame end */
+
+	/* second descr */
+	card->tx_chain.head = card->tx_chain.head->next;
+	descr->next_descr_addr = descr->next->bus_addr;
+	descr = descr->next;
+	if (gelic_net_get_descr_status(descr) != GELIC_NET_DESCR_NOT_IN_USE)
+		/* XXX will be removed */
+		dev_err(ctodev(card), "descr is not free!\n");
+
+	buf[1] = dma_map_single(ctodev(card), skb->data + GELIC_NET_VLAN_POS,
+			     skb->len - GELIC_NET_VLAN_POS,
+			     DMA_TO_DEVICE);
+
+	if (!buf[1]) {
+		dev_err(ctodev(card),
+			"dma map 2 failed (%p, %i). Dropping packet\n",
+			skb->data + GELIC_NET_VLAN_POS,
+			skb->len - GELIC_NET_VLAN_POS);
+		dma_unmap_single(ctodev(card), buf[0], vlan_len,
+				 DMA_TO_DEVICE);
+		return -ENOMEM;
+	}
+
+	descr->buf_addr = buf[1];
+	descr->buf_size = skb->len - GELIC_NET_VLAN_POS;
+	descr->skb = skb;
+	descr->data_status = 0;
+	descr->next_descr_addr = 0; /* terminate hw descr */
+	gelic_net_set_txdescr_cmdstat(descr, skb, 0);
+
+	return 0;
+}
+
+/**
+ * gelic_net_kick_txdma - enables TX DMA processing
+ * @card: card structure
+ * @descr: descriptor address to enable TX processing at
+ *
+ */
+static int gelic_net_kick_txdma(struct gelic_net_card *card,
+				struct gelic_net_descr *descr)
+{
+	int status = -ENXIO;
+	int count = 10;
+
+	if (card->tx_dma_progress)
+		return 0;
+
+	if (gelic_net_get_descr_status(descr) == GELIC_NET_DESCR_CARDOWNED) {
+		card->tx_dma_progress = 1;
+		/* sometimes we need retry here */
+		while (count--) {
+			status = lv1_net_start_tx_dma(bus_id(card),
+						      dev_id(card),
+						      descr->bus_addr, 0);
+			if (!status)
+				break;
+		}
+		if (!count)
+			dev_info(ctodev(card), "lv1_net_start_txdma failed," \
+				"status=%d %#lx\n",
+				 status, card->irq_status);
+	}
+	return status;
+}
+
+/**
+ * gelic_net_xmit - transmits a frame over the device
+ * @skb: packet to send out
+ * @netdev: interface device structure
+ *
+ * returns 0 on success, <0 on failure
+ */
+static int gelic_net_xmit(struct sk_buff *skb, struct net_device *netdev)
+{
+	struct gelic_net_card *card = netdev_priv(netdev);
+	struct gelic_net_descr *descr = NULL;
+	int result;
+	unsigned long flags;
+
+	spin_lock_irqsave(&card->tx_dma_lock, flags);
+
+	gelic_net_release_tx_chain(card, 0);
+	if (!skb)
+		goto kick;
+	descr = gelic_net_get_next_tx_descr(card);
+	if (!descr) {
+		netif_stop_queue(netdev);
+		spin_unlock_irqrestore(&card->tx_dma_lock, flags);
+		return NETDEV_TX_BUSY;
+	}
+	result = gelic_net_prepare_tx_descr_v(card, descr, skb);
+
+	if (result)
+		goto error;
+
+	card->tx_chain.head = card->tx_chain.head->next;
+
+	if (descr->prev)
+		descr->prev->next_descr_addr = descr->bus_addr;
+kick:
+	/*
+	 * as hardware descriptor is modified in the above lines,
+	 * ensure that the hardware sees it
+	 */
+	wmb();
+	if (gelic_net_kick_txdma(card, card->tx_chain.tail))
+		goto error;
+
+	netdev->trans_start = jiffies;
+	spin_unlock_irqrestore(&card->tx_dma_lock, flags);
+	return NETDEV_TX_OK;
+
+error:
+	card->netdev_stats.tx_dropped++;
+	spin_unlock_irqrestore(&card->tx_dma_lock, flags);
+	return NETDEV_TX_LOCKED;
+}
+
+/**
+ * gelic_net_pass_skb_up - takes an skb from a descriptor and passes it on
+ * @descr: descriptor to process
+ * @card: card structure
+ *
+ * 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_net_descr *descr,
+				 struct gelic_net_card *card)
+{
+	struct sk_buff *skb;
+	struct net_device *netdev;
+	u32 data_status, data_error;
+
+	data_status = descr->data_status;
+	data_error = descr->data_error;
+	netdev = card->netdev;
+	/* unmap skb buffer */
+	skb = descr->skb;
+	dma_unmap_single(ctodev(card), descr->buf_addr, GELIC_NET_MAX_MTU,
+			 DMA_FROM_DEVICE);
+
+	skb_put(skb, descr->valid_size? descr->valid_size : descr->result_size);
+	if (!descr->valid_size)
+		dev_info(ctodev(card), "buffer full %x %x %x\n",
+			 descr->result_size, descr->buf_size,
+			 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 (card->rx_csum) {
+		if ((data_status & GELIC_NET_DATA_STATUS_CHK_MASK) &&
+		    (!(data_error & GELIC_NET_DATA_ERROR_CHK_MASK)))
+			skb->ip_summed = CHECKSUM_UNNECESSARY;
+		else
+			skb->ip_summed = CHECKSUM_NONE;
+	} else
+		skb->ip_summed = CHECKSUM_NONE;
+
+	/* update netdevice statistics */
+	card->netdev_stats.rx_packets++;
+	card->netdev_stats.rx_bytes += skb->len;
+
+	/* pass skb up to stack */
+	netif_receive_skb(skb);
+}
+
+/**
+ * gelic_net_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_net_decode_one_descr(struct gelic_net_card *card)
+{
+	enum gelic_net_descr_status status;
+	struct gelic_net_descr_chain *chain = &card->rx_chain;
+	struct gelic_net_descr *descr = chain->tail;
+	int dmac_chain_ended;
+
+	status = gelic_net_get_descr_status(descr);
+	/* is this descriptor terminated with next_descr == NULL? */
+	dmac_chain_ended =
+		descr->dmac_cmd_status & GELIC_NET_DMAC_CMDSTAT_RXDCEIS;
+
+	if (status == GELIC_NET_DESCR_CARDOWNED)
+		return 0;
+
+	if (status == GELIC_NET_DESCR_NOT_IN_USE) {
+		dev_dbg(ctodev(card), "dormant descr? %p\n", descr);
+		return 0;
+	}
+
+	if ((status == GELIC_NET_DESCR_RESPONSE_ERROR) ||
+	    (status == GELIC_NET_DESCR_PROTECTION_ERROR) ||
+	    (status == GELIC_NET_DESCR_FORCE_END)) {
+		dev_info(ctodev(card), "dropping RX descriptor with state %x\n",
+			 status);
+		card->netdev_stats.rx_dropped++;
+		goto refill;
+	}
+
+	if ((status != GELIC_NET_DESCR_COMPLETE) &&
+	    (status != GELIC_NET_DESCR_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); /* 1: skb_up sccess */
+
+refill:
+	descr->next_descr_addr = 0; /* unlink the descr */
+
+	/* change the descriptor state: */
+	gelic_net_set_descr_status(descr, GELIC_NET_DESCR_NOT_IN_USE);
+
+	/* refill one desc
+	 * FIXME: this can fail, but for now, just leave this
+	 * descriptor without skb
+	 */
+	gelic_net_prepare_rx_descr(card, descr);
+	chain->head = descr;
+	chain->tail = descr->next;
+	descr->prev->next_descr_addr = descr->bus_addr;
+
+	if (dmac_chain_ended) {
+		gelic_net_enable_rxdmac(card);
+		dev_dbg(ctodev(card), "reenable rx dma\n");
+	}
+
+	return 1;
+}
+
+/**
+ * gelic_net_poll - NAPI poll function called by the stack to return packets
+ * @netdev: interface device structure
+ * @budget: number of packets we can pass to the stack at most
+ *
+ * returns 0 if no more packets available to the driver/stack. Returns 1,
+ * if the quota is exceeded, but the driver has still packets.
+ *
+ */
+static int gelic_net_poll(struct net_device *netdev, int *budget)
+{
+	struct gelic_net_card *card = netdev_priv(netdev);
+	int packets_to_do, packets_done = 0;
+	int no_more_packets = 0;
+
+	packets_to_do = min(*budget, netdev->quota);
+
+	while (packets_to_do) {
+		if (gelic_net_decode_one_descr(card)) {
+			packets_done++;
+			packets_to_do--;
+		} else {
+			/* no more packets for the stack */
+			no_more_packets = 1;
+			break;
+		}
+	}
+	netdev->quota -= packets_done;
+	*budget -= packets_done;
+	if (no_more_packets) {
+		netif_rx_complete(netdev);
+		gelic_net_rx_irq_on(card);
+		return 0;
+	} else
+		return 1;
+}
+
+/**
+ * gelic_net_get_stats - get interface statistics
+ * @netdev: interface device structure
+ *
+ * returns the interface statistics residing in the gelic_net_card struct
+ */
+static struct net_device_stats *gelic_net_get_stats(struct net_device *netdev)
+{
+	struct gelic_net_card *card = netdev_priv(netdev);
+
+	return &card->netdev_stats;
+}
+
+/**
+ * gelic_net_change_mtu - changes the MTU of an interface
+ * @netdev: interface device structure
+ * @new_mtu: new MTU value
+ *
+ * returns 0 on success, <0 on failure
+ */
+static int gelic_net_change_mtu(struct net_device *netdev, int new_mtu)
+{
+	/* no need to re-alloc skbs or so -- the max mtu is about 2.3k
+	 * and mtu is outbound only anyway */
+	if ((new_mtu < GELIC_NET_MIN_MTU) ||
+	    (new_mtu > GELIC_NET_MAX_MTU)) {
+		return -EINVAL;
+	}
+	netdev->mtu = new_mtu;
+	return 0;
+}
+
+/**
+ * gelic_net_interrupt - event handler for gelic_net
+ */
+static irqreturn_t gelic_net_interrupt(int irq, void *ptr)
+{
+	unsigned long flags;
+	struct net_device *netdev = ptr;
+	struct gelic_net_card *card = netdev_priv(netdev);
+	u64 status;
+
+	status = card->irq_status;
+
+	if (!status)
+		return IRQ_NONE;
+
+	if (status & GELIC_NET_RXINT) {
+		gelic_net_rx_irq_off(card);
+		netif_rx_schedule(netdev);
+	}
+
+	if (status & GELIC_NET_TXINT) {
+		spin_lock_irqsave(&card->tx_dma_lock, flags);
+		card->tx_dma_progress = 0;
+		spin_unlock_irqrestore(&card->tx_dma_lock, flags);
+		/* start pending DMA */
+		gelic_net_xmit(NULL, netdev);
+	}
+	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.txt
+ */
+static void gelic_net_poll_controller(struct net_device *netdev)
+{
+	struct gelic_net_card *card = netdev_priv(netdev);
+
+	gelic_net_set_irq_mask(card, 0);
+	gelic_net_interrupt(netdev->irq, netdev);
+	gelic_net_set_irq_mask(card, card->ghiintmask);
+}
+#endif /* CONFIG_NET_POLL_CONTROLLER */
+
+/**
+ * gelic_net_open_device - open device and map dma region
+ * @card: card structure
+ */
+static int gelic_net_open_device(struct gelic_net_card *card)
+{
+	int result;
+
+	result = ps3_sb_event_receive_port_setup(card->dev, PS3_BINDING_CPU_ANY,
+		&card->netdev->irq);
+
+	if (result) {
+		dev_info(ctodev(card),
+			 "%s:%d: gelic_net_open_device failed (%d)\n",
+			 __func__, __LINE__, result);
+		result = -EPERM;
+		goto fail_alloc_irq;
+	}
+
+	result = request_irq(card->netdev->irq, gelic_net_interrupt,
+			     IRQF_DISABLED, "gelic network", card->netdev);
+
+	if (result) {
+		dev_info(ctodev(card), "%s:%d: request_irq failed (%d)\n",
+			__func__, __LINE__, result);
+		goto fail_request_irq;
+	}
+
+	return 0;
+
+fail_request_irq:
+	ps3_sb_event_receive_port_destroy(card->dev, card->netdev->irq);
+	card->netdev->irq = NO_IRQ;
+fail_alloc_irq:
+	return result;
+}
+
+
+/**
+ * gelic_net_open - called upon ifonfig 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
+ */
+static int gelic_net_open(struct net_device *netdev)
+{
+	struct gelic_net_card *card = netdev_priv(netdev);
+
+	dev_dbg(ctodev(card), " -> %s:%d\n", __func__, __LINE__);
+
+	gelic_net_open_device(card);
+
+	if (gelic_net_init_chain(card, &card->tx_chain,
+			card->descr, GELIC_NET_TX_DESCRIPTORS))
+		goto alloc_tx_failed;
+	if (gelic_net_init_chain(card, &card->rx_chain,
+				 card->descr + GELIC_NET_RX_DESCRIPTORS,
+				 GELIC_NET_RX_DESCRIPTORS))
+		goto alloc_rx_failed;
+
+	/* 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_net_descr),
+		GELIC_NET_RX_DESCRIPTORS);
+	/* allocate rx skbs */
+	if (gelic_net_alloc_rx_skbs(card))
+		goto alloc_skbs_failed;
+
+	card->tx_dma_progress = 0;
+	card->ghiintmask = GELIC_NET_RXINT | GELIC_NET_TXINT;
+
+	gelic_net_set_irq_mask(card, card->ghiintmask);
+	gelic_net_enable_rxdmac(card);
+
+	netif_start_queue(netdev);
+	netif_carrier_on(netdev);
+	netif_poll_enable(netdev);
+
+	return 0;
+
+alloc_skbs_failed:
+	gelic_net_free_chain(card, card->rx_top);
+alloc_rx_failed:
+	gelic_net_free_chain(card, card->tx_top);
+alloc_tx_failed:
+	return -ENOMEM;
+}
+
+#ifdef GELIC_NET_ETHTOOL
+static void gelic_net_get_drvinfo (struct net_device *netdev,
+				   struct ethtool_drvinfo *info)
+{
+	strncpy(info->driver, DRV_NAME, sizeof(info->driver) - 1);
+	strncpy(info->version, DRV_VERSION, sizeof(info->version) - 1);
+}
+
+static int gelic_net_get_settings(struct net_device *netdev,
+				  struct ethtool_cmd *cmd)
+{
+	struct gelic_net_card *card = netdev_priv(netdev);
+	int status;
+	u64 v1, v2;
+	int speed, duplex;
+
+	speed = duplex = -1;
+	status = lv1_net_control(bus_id(card), dev_id(card),
+			GELIC_NET_GET_ETH_PORT_STATUS, GELIC_NET_PORT, 0, 0,
+			&v1, &v2);
+	if (status) {
+		/* link down */
+	} else {
+		if (v1 & GELIC_NET_FULL_DUPLEX) {
+			duplex = DUPLEX_FULL;
+		} else {
+			duplex = DUPLEX_HALF;
+		}
+
+		if (v1 & GELIC_NET_SPEED_10 ) {
+			speed = SPEED_10;
+		} else if (v1 & GELIC_NET_SPEED_100) {
+			speed = SPEED_100;
+		} else if (v1 & GELIC_NET_SPEED_1000) {
+			speed = SPEED_1000;
+		}
+	}
+	cmd->supported = SUPPORTED_TP | SUPPORTED_Autoneg |
+			SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
+			SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
+			SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full;
+	cmd->advertising = cmd->supported;
+	cmd->speed = speed;
+	cmd->duplex = duplex;
+	cmd->autoneg = AUTONEG_ENABLE; /* always enabled */
+	cmd->port = PORT_TP;
+
+	return 0;
+}
+
+static u32 gelic_net_get_link(struct net_device *netdev)
+{
+	struct gelic_net_card *card = netdev_priv(netdev);
+	int status;
+	u64 v1, v2;
+	int link;
+
+	status = lv1_net_control(bus_id(card), dev_id(card),
+			GELIC_NET_GET_ETH_PORT_STATUS, GELIC_NET_PORT, 0, 0,
+			&v1, &v2);
+	if (status)
+		return 0; /* link down */
+
+	if (v1 & GELIC_NET_LINK_UP)
+		link = 1;
+	else
+		link = 0;
+
+	return link;
+}
+
+static int gelic_net_nway_reset(struct net_device *netdev)
+{
+	if (netif_running(netdev)) {
+		gelic_net_stop(netdev);
+		gelic_net_open(netdev);
+	}
+	return 0;
+}
+
+static u32 gelic_net_get_tx_csum(struct net_device *netdev)
+{
+	return (netdev->features & NETIF_F_IP_CSUM) != 0;
+}
+
+static int gelic_net_set_tx_csum(struct net_device *netdev, u32 data)
+{
+	if (data)
+		netdev->features |= NETIF_F_IP_CSUM;
+	else
+		netdev->features &= ~NETIF_F_IP_CSUM;
+
+	return 0;
+}
+
+static u32 gelic_net_get_rx_csum(struct net_device *netdev)
+{
+	struct gelic_net_card *card = netdev_priv(netdev);
+
+	return card->rx_csum;
+}
+
+static int gelic_net_set_rx_csum(struct net_device *netdev, u32 data)
+{
+	struct gelic_net_card *card = netdev_priv(netdev);
+
+	card->rx_csum = data;
+	return 0;
+}
+
+static struct ethtool_ops gelic_net_ethtool_ops = {
+	.get_drvinfo	= gelic_net_get_drvinfo,
+	.get_settings	= gelic_net_get_settings,
+	.get_link	= gelic_net_get_link,
+	.nway_reset	= gelic_net_nway_reset,
+	.get_tx_csum	= gelic_net_get_tx_csum,
+	.set_tx_csum	= gelic_net_set_tx_csum,
+	.get_rx_csum	= gelic_net_get_rx_csum,
+	.set_rx_csum	= gelic_net_set_rx_csum,
+};
+#endif
+
+/**
+ * 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_net_card *card =
+		container_of(work, struct gelic_net_card, tx_timeout_task);
+	struct net_device *netdev = card->netdev;
+
+	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
+ *
+ * called, if tx hangs. Schedules a task that resets the interface
+ */
+static void gelic_net_tx_timeout(struct net_device *netdev)
+{
+	struct gelic_net_card *card;
+
+	card = netdev_priv(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);
+}
+
+/**
+ * gelic_net_setup_netdev_ops - initialization of net_device operations
+ * @netdev: net_device structure
+ *
+ * fills out function pointers in the net_device structure
+ */
+static void gelic_net_setup_netdev_ops(struct net_device *netdev)
+{
+	netdev->open = &gelic_net_open;
+	netdev->stop = &gelic_net_stop;
+	netdev->hard_start_xmit = &gelic_net_xmit;
+	netdev->get_stats = &gelic_net_get_stats;
+	netdev->set_multicast_list = &gelic_net_set_multi;
+	netdev->change_mtu = &gelic_net_change_mtu;
+	/* tx watchdog */
+	netdev->tx_timeout = &gelic_net_tx_timeout;
+	netdev->watchdog_timeo = GELIC_NET_WATCHDOG_TIMEOUT;
+	/* NAPI */
+	netdev->poll = &gelic_net_poll;
+	netdev->weight = GELIC_NET_NAPI_WEIGHT;
+#ifdef GELIC_NET_ETHTOOL
+	netdev->ethtool_ops = &gelic_net_ethtool_ops;
+#endif
+}
+
+/**
+ * gelic_net_setup_netdev - initialization of net_device
+ * @card: card structure
+ *
+ * Returns 0 on success or <0 on failure
+ *
+ * gelic_net_setup_netdev initializes the net_device structure
+ **/
+static int gelic_net_setup_netdev(struct gelic_net_card *card)
+{
+	struct net_device *netdev = card->netdev;
+	struct sockaddr addr;
+	unsigned int i;
+	int status;
+	u64 v1, v2;
+
+	SET_MODULE_OWNER(netdev);
+	SET_NETDEV_DEV(netdev, &card->dev->core);
+	spin_lock_init(&card->tx_dma_lock);
+
+	card->rx_csum = GELIC_NET_RX_CSUM_DEFAULT;
+
+	gelic_net_setup_netdev_ops(netdev);
+
+	netdev->features = NETIF_F_IP_CSUM;
+
+	status = lv1_net_control(bus_id(card), dev_id(card),
+				 GELIC_NET_GET_MAC_ADDRESS,
+				 0, 0, 0, &v1, &v2);
+	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;
+	}
+	v1 <<= 16;
+	memcpy(addr.sa_data, &v1, ETH_ALEN);
+	memcpy(netdev->dev_addr, addr.sa_data, ETH_ALEN);
+	dev_info(ctodev(card), "MAC addr %02x:%02x:%02x:%02x:%02x:%02x\n",
+		 netdev->dev_addr[0], netdev->dev_addr[1],
+		 netdev->dev_addr[2], netdev->dev_addr[3],
+		 netdev->dev_addr[4], netdev->dev_addr[5]);
+
+	card->vlan_index = -1;	/* no vlan */
+	for (i = 0; i < GELIC_NET_VLAN_MAX; i++) {
+		status = lv1_net_control(bus_id(card), dev_id(card),
+					GELIC_NET_GET_VLAN_ID,
+					i + 1, /* index; one based */
+					0, 0, &v1, &v2);
+		if (status == GELIC_NET_VLAN_NO_ENTRY) {
+			dev_dbg(ctodev(card),
+				"GELIC_VLAN_ID no entry:%d, VLAN disabled\n",
+				status);
+			card->vlan_id[i] = 0;
+		} else if (status) {
+			dev_dbg(ctodev(card),
+				"%s:GELIC_NET_VLAN_ID faild, status=%d\n",
+				__func__, status);
+			card->vlan_id[i] = 0;
+		} else {
+			card->vlan_id[i] = (u32)v1;
+			dev_dbg(ctodev(card), "vlan_id:%d, %lx\n", i, v1);
+		}
+	}
+	if (card->vlan_id[GELIC_NET_VLAN_WIRED - 1])
+		card->vlan_index = GELIC_NET_VLAN_WIRED - 1;
+
+	status = register_netdev(netdev);
+	if (status) {
+		dev_err(ctodev(card), "%s:Couldn't register net_device: %d\n",
+			__func__, status);
+		return status;
+	}
+
+	return 0;
+}
+
+/**
+ * gelic_net_alloc_card - 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
+ */
+static struct gelic_net_card *gelic_net_alloc_card(void)
+{
+	struct net_device *netdev;
+	struct gelic_net_card *card;
+	size_t alloc_size;
+
+	alloc_size = sizeof (*card) +
+		sizeof (struct gelic_net_descr) * GELIC_NET_RX_DESCRIPTORS +
+		sizeof (struct gelic_net_descr) * GELIC_NET_TX_DESCRIPTORS;
+	/*
+	 * we assume private data is allocated 32 bytes (or more) aligned
+	 * so that gelic_net_descr should be 32 bytes aligned.
+	 * Current alloc_etherdev() does do it because NETDEV_ALIGN
+	 * is 32.
+	 * check this assumption here.
+	 */
+	BUILD_BUG_ON(NETDEV_ALIGN < 32);
+	BUILD_BUG_ON(offsetof(struct gelic_net_card, irq_status) % 8);
+	BUILD_BUG_ON(offsetof(struct gelic_net_card, descr) % 32);
+
+	netdev = alloc_etherdev(alloc_size);
+	if (!netdev)
+		return NULL;
+
+	card = netdev_priv(netdev);
+	card->netdev = 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);
+
+	return card;
+}
+
+/**
+ * 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_net_card *card = gelic_net_alloc_card();
+	int result;
+
+	if (!card) {
+		dev_info(&dev->core, "gelic_net_alloc_card failed\n");
+		result = -ENOMEM;
+		goto fail_alloc_card;
+	}
+
+	ps3_system_bus_set_driver_data(dev, card);
+	card->dev = dev;
+
+	result = ps3_open_hv_device(dev);
+
+	if (result) {
+		dev_dbg(&dev->core, "ps3_open_hv_device failed\n");
+		goto fail_open;
+	}
+
+	result = ps3_dma_region_create(dev->d_region);
+
+	if (result) {
+		dev_dbg(&dev->core, "ps3_dma_region_create failed(%d)\n",
+			result);
+		BUG_ON("check region type");
+		goto fail_dma_region;
+	}
+
+	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,
+			"lv1_net_set_interrupt_status_indicator failed: %s\n",
+			ps3_result(result));
+		result = -EIO;
+		goto fail_status_indicator;
+	}
+
+	result = gelic_net_setup_netdev(card);
+
+	if (result) {
+		dev_dbg(&dev->core, "%s:%d: ps3_dma_region_create failed: "
+			"(%d)\n", __func__, __LINE__, result);
+		goto fail_setup_netdev;
+	}
+
+	return 0;
+
+fail_setup_netdev:
+	lv1_net_set_interrupt_status_indicator(bus_id(card),
+					       bus_id(card),
+					       0 , 0);
+fail_status_indicator:
+	ps3_dma_region_free(dev->d_region);
+fail_dma_region:
+	ps3_close_hv_device(dev);
+fail_open:
+	ps3_system_bus_set_driver_data(dev, NULL);
+	free_netdev(card->netdev);
+fail_alloc_card:
+	return result;
+}
+
+/**
+ * ps3_gelic_driver_remove - remove a device from the control of this driver
+ */
+
+static int ps3_gelic_driver_remove (struct ps3_system_bus_device *dev)
+{
+	struct gelic_net_card *card = ps3_system_bus_get_driver_data(dev);
+
+	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(card->netdev);
+	free_netdev(card->netdev);
+
+	ps3_system_bus_set_driver_data(dev, NULL);
+
+	ps3_dma_region_free(dev->d_region);
+
+	ps3_close_hv_device(dev);
+
+	return 0;
+}
+
+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);
+
diff --git a/drivers/net/ps3_gelic_net.h b/drivers/net/ps3_gelic_net.h
new file mode 100644
index 0000000..5e1c286
--- /dev/null
+++ b/drivers/net/ps3_gelic_net.h
@@ -0,0 +1,239 @@
+/*
+ *  PS3 Platfom gelic network driver.
+ *
+ * Copyright (C) 2007 Sony Computer Entertainment Inc.
+ * Copyright 2006, 2007 Sony Corporation.
+ *
+ * This file is based on: spider_net.h
+ *
+ * (C) Copyright IBM Corp. 2005
+ *
+ * Authors : Utz Bacher <utz.bacher@de.ibm.com>
+ *           Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#ifndef _GELIC_NET_H
+#define _GELIC_NET_H
+
+#define GELIC_NET_DRV_NAME "Gelic Network Driver"
+#define GELIC_NET_DRV_VERSION "1.0"
+
+#define GELIC_NET_ETHTOOL               /* use ethtool */
+
+/* ioctl */
+#define GELIC_NET_GET_MODE              (SIOCDEVPRIVATE + 0)
+#define GELIC_NET_SET_MODE              (SIOCDEVPRIVATE + 1)
+
+/* descriptors */
+#define GELIC_NET_RX_DESCRIPTORS        128 /* num of descriptors */
+#define GELIC_NET_TX_DESCRIPTORS        128 /* num of descriptors */
+
+#define GELIC_NET_MAX_MTU               2308
+#define GELIC_NET_MIN_MTU               64
+#define GELIC_NET_RXBUF_ALIGN           128
+#define GELIC_NET_RX_CSUM_DEFAULT       1 /* hw chksum */
+#define GELIC_NET_WATCHDOG_TIMEOUT      5*HZ
+#define GELIC_NET_NAPI_WEIGHT           (GELIC_NET_RX_DESCRIPTORS)
+#define GELIC_NET_BROADCAST_ADDR        0xffffffffffffL
+#define GELIC_NET_VLAN_POS              (VLAN_ETH_ALEN * 2)
+#define GELIC_NET_VLAN_MAX              4
+#define GELIC_NET_MC_COUNT_MAX          32 /* multicast address list */
+
+enum gelic_net_int0_status {
+	GELIC_NET_GDTDCEINT  = 24,
+	GELIC_NET_GRFANMINT  = 28,
+};
+
+/* GHIINT1STS bits */
+enum gelic_net_int1_status {
+	GELIC_NET_GDADCEINT = 14,
+};
+
+/* interrupt mask */
+#define GELIC_NET_TXINT                   (1L << (GELIC_NET_GDTDCEINT + 32))
+
+#define GELIC_NET_RXINT0                  (1L << (GELIC_NET_GRFANMINT + 32))
+#define GELIC_NET_RXINT1                  (1L << GELIC_NET_GDADCEINT)
+#define GELIC_NET_RXINT                   (GELIC_NET_RXINT0 | GELIC_NET_RXINT1)
+
+ /* RX descriptor data_status bits */
+#define GELIC_NET_RXDMADU	0x80000000 /* destination MAC addr unknown */
+#define GELIC_NET_RXLSTFBF	0x40000000 /* last frame buffer            */
+#define GELIC_NET_RXIPCHK	0x20000000 /* IP checksum performed        */
+#define GELIC_NET_RXTCPCHK	0x10000000 /* TCP/UDP checksup performed   */
+#define GELIC_NET_RXIPSPKT	0x08000000 /* IPsec packet   */
+#define GELIC_NET_RXIPSAHPRT	0x04000000 /* IPsec AH protocol performed */
+#define GELIC_NET_RXIPSESPPRT	0x02000000 /* IPsec ESP protocol performed */
+#define GELIC_NET_RXSESPAH	0x01000000 /*
+					    * IPsec ESP protocol auth
+					    * performed
+					    */
+
+#define GELIC_NET_RXWTPKT	0x00C00000 /*
+					    * wakeup trigger packet
+					    * 01: Magic Packet (TM)
+					    * 10: ARP packet
+					    * 11: Multicast MAC addr
+					    */
+#define GELIC_NET_RXVLNPKT	0x00200000 /* VLAN packet */
+/* bit 20..16 reserved */
+#define GELIC_NET_RXRECNUM	0x0000ff00 /* reception receipt number */
+/* bit 7..0 reserved */
+
+#define GELIC_NET_TXDESC_TAIL		0
+#define GELIC_NET_DATA_STATUS_CHK_MASK	(GELIC_NET_RXIPCHK | GELIC_NET_RXTCPCHK)
+
+/* RX descriptor data_error bits */
+/* bit 31 reserved */
+#define GELIC_NET_RXALNERR	0x40000000 /* alignement error 10/100M */
+#define GELIC_NET_RXOVERERR	0x20000000 /* oversize error */
+#define GELIC_NET_RXRNTERR	0x10000000 /* Runt error */
+#define GELIC_NET_RXIPCHKERR	0x08000000 /* IP checksum  error */
+#define GELIC_NET_RXTCPCHKERR	0x04000000 /* TCP/UDP checksum  error */
+#define GELIC_NET_RXUMCHSP	0x02000000 /* unmatched sp on sp */
+#define GELIC_NET_RXUMCHSPI	0x01000000 /* unmatched SPI on SAD */
+#define GELIC_NET_RXUMCHSAD	0x00800000 /* unmatched SAD */
+#define GELIC_NET_RXIPSAHERR	0x00400000 /* auth error on AH protocol
+					    * processing */
+#define GELIC_NET_RXIPSESPAHERR	0x00200000 /* auth error on ESP protocol
+					    * processing */
+#define GELIC_NET_RXDRPPKT	0x00100000 /* drop packet */
+#define GELIC_NET_RXIPFMTERR	0x00080000 /* IP packet format error */
+/* bit 18 reserved */
+#define GELIC_NET_RXDATAERR	0x00020000 /* IP packet format error */
+#define GELIC_NET_RXCALERR	0x00010000 /* cariier extension length
+					    * error */
+#define GELIC_NET_RXCREXERR	0x00008000 /* carrier extention error */
+#define GELIC_NET_RXMLTCST	0x00004000 /* multicast address frame */
+/* bit 13..0 reserved */
+#define GELIC_NET_DATA_ERROR_CHK_MASK		\
+	(GELIC_NET_RXIPCHKERR | GELIC_NET_RXTCPCHKERR)
+
+
+/* tx descriptor command and status */
+#define GELIC_NET_DMAC_CMDSTAT_NOCS       0xa0080000 /* middle of frame */
+#define GELIC_NET_DMAC_CMDSTAT_TCPCS      0xa00a0000
+#define GELIC_NET_DMAC_CMDSTAT_UDPCS      0xa00b0000
+#define GELIC_NET_DMAC_CMDSTAT_END_FRAME  0x00040000 /* end of frame */
+
+#define GELIC_NET_DMAC_CMDSTAT_RXDCEIS	  0x00000002 /* descriptor chain end
+						      * interrupt status */
+
+#define GELIC_NET_DMAC_CMDSTAT_CHAIN_END  0x00000002 /* RXDCEIS:DMA stopped */
+#define GELIC_NET_DMAC_CMDSTAT_NOT_IN_USE 0xb0000000
+#define GELIC_NET_DESCR_IND_PROC_SHIFT    28
+#define GELIC_NET_DESCR_IND_PROC_MASKO    0x0fffffff
+
+
+enum gelic_net_descr_status {
+	GELIC_NET_DESCR_COMPLETE            = 0x00, /* used in rx and tx */
+	GELIC_NET_DESCR_RESPONSE_ERROR      = 0x01, /* used in rx and tx */
+	GELIC_NET_DESCR_PROTECTION_ERROR    = 0x02, /* used in rx and tx */
+	GELIC_NET_DESCR_FRAME_END           = 0x04, /* used in rx */
+	GELIC_NET_DESCR_FORCE_END           = 0x05, /* used in rx and tx */
+	GELIC_NET_DESCR_CARDOWNED           = 0x0a, /* used in rx and tx */
+	GELIC_NET_DESCR_NOT_IN_USE                  /* any other value */
+};
+/* for lv1_net_control */
+#define GELIC_NET_GET_MAC_ADDRESS               0x0000000000000001
+#define GELIC_NET_GET_ETH_PORT_STATUS           0x0000000000000002
+#define GELIC_NET_SET_NEGOTIATION_MODE          0x0000000000000003
+#define GELIC_NET_GET_VLAN_ID                   0x0000000000000004
+
+#define GELIC_NET_LINK_UP                       0x0000000000000001
+#define GELIC_NET_FULL_DUPLEX                   0x0000000000000002
+#define GELIC_NET_AUTO_NEG                      0x0000000000000004
+#define GELIC_NET_SPEED_10                      0x0000000000000010
+#define GELIC_NET_SPEED_100                     0x0000000000000020
+#define GELIC_NET_SPEED_1000                    0x0000000000000040
+
+#define GELIC_NET_VLAN_ALL                      0x0000000000000001
+#define GELIC_NET_VLAN_WIRED                    0x0000000000000002
+#define GELIC_NET_VLAN_WIRELESS                 0x0000000000000003
+#define GELIC_NET_VLAN_PSP                      0x0000000000000004
+#define GELIC_NET_VLAN_PORT0                    0x0000000000000010
+#define GELIC_NET_VLAN_PORT1                    0x0000000000000011
+#define GELIC_NET_VLAN_PORT2                    0x0000000000000012
+#define GELIC_NET_VLAN_DAEMON_CLIENT_BSS        0x0000000000000013
+#define GELIC_NET_VLAN_LIBERO_CLIENT_BSS        0x0000000000000014
+#define GELIC_NET_VLAN_NO_ENTRY                 -6
+
+#define GELIC_NET_PORT                          2 /* for port status */
+
+/* size of hardware part of gelic descriptor */
+#define GELIC_NET_DESCR_SIZE	(32)
+struct gelic_net_descr {
+	/* as defined by the hardware */
+	u32 buf_addr;
+	u32 buf_size;
+	u32 next_descr_addr;
+	u32 dmac_cmd_status;
+	u32 result_size;
+	u32 valid_size;	/* all zeroes for tx */
+	u32 data_status;
+	u32 data_error;	/* all zeroes for tx */
+
+	/* used in the driver */
+	struct sk_buff *skb;
+	dma_addr_t bus_addr;
+	struct gelic_net_descr *next;
+	struct gelic_net_descr *prev;
+	struct vlan_ethhdr vlan;
+} __attribute__((aligned(32)));
+
+struct gelic_net_descr_chain {
+	/* we walk from tail to head */
+	struct gelic_net_descr *head;
+	struct gelic_net_descr *tail;
+};
+
+struct gelic_net_card {
+	struct net_device *netdev;
+	/*
+	 * hypervisor requires irq_status should be
+	 * 8 bytes aligned, but u64 member is
+	 * always disposed in that manner
+	 */
+	u64 irq_status;
+	u64 ghiintmask;
+
+	struct ps3_system_bus_device *dev;
+	u32 vlan_id[GELIC_NET_VLAN_MAX];
+	int vlan_index;
+
+	struct gelic_net_descr_chain tx_chain;
+	struct gelic_net_descr_chain rx_chain;
+	/* gurad dmac descriptor chain*/
+	spinlock_t chain_lock;
+
+	struct net_device_stats netdev_stats;
+	int rx_csum;
+	/* guard tx_dma_progress */
+	spinlock_t tx_dma_lock;
+	int tx_dma_progress;
+
+	struct work_struct tx_timeout_task;
+	atomic_t tx_timeout_task_counter;
+	wait_queue_head_t waitq;
+
+	struct gelic_net_descr *tx_top, *rx_top;
+	struct gelic_net_descr descr[0];
+};
+
+
+extern unsigned long p_to_lp(long pa);
+
+#endif /* _GELIC_NET_H */