--- /dev/null
+/*
+ * Network device driver for Cell Processor-Based Blade
+ *
+ * (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.
+ */
+
+#include <linux/config.h>
+
+#include <linux/compiler.h>
+#include <linux/crc32.h>
+#include <linux/delay.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/firmware.h>
+#include <linux/if_vlan.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/ip.h>
+#include <linux/kernel.h>
+#include <linux/mii.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/device.h>
+#include <linux/pci.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/tcp.h>
+#include <linux/types.h>
+#include <linux/wait.h>
+#include <linux/workqueue.h>
+#include <asm/bitops.h>
+#include <asm/pci-bridge.h>
+#include <net/checksum.h>
+
+#include "spider_net.h"
+
+MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \
+ "<Jens.Osterkamp@de.ibm.com>");
+MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver");
+MODULE_LICENSE("GPL");
+
+static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT;
+static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT;
+
+module_param(rx_descriptors, int, 0644);
+module_param(tx_descriptors, int, 0644);
+
+MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \
+ "in rx chains");
+MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \
+ "in tx chain");
+
+char spider_net_driver_name[] = "spidernet";
+
+static struct pci_device_id spider_net_pci_tbl[] = {
+ { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
+ { 0, }
+};
+
+MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl);
+
+/**
+ * spider_net_read_reg - reads an SMMIO register of a card
+ * @card: device structure
+ * @reg: register to read from
+ *
+ * returns the content of the specified SMMIO register.
+ */
+static u32
+spider_net_read_reg(struct spider_net_card *card, u32 reg)
+{
+ u32 value;
+
+ value = readl(card->regs + reg);
+ value = le32_to_cpu(value);
+
+ return value;
+}
+
+/**
+ * spider_net_write_reg - writes to an SMMIO register of a card
+ * @card: device structure
+ * @reg: register to write to
+ * @value: value to write into the specified SMMIO register
+ */
+static void
+spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
+{
+ value = cpu_to_le32(value);
+ writel(value, card->regs + reg);
+}
+
+/**
+ * spider_net_rx_irq_off - switch off rx irq on this spider card
+ * @card: device structure
+ *
+ * switches off rx irq by masking them out in the GHIINTnMSK register
+ */
+static void
+spider_net_rx_irq_off(struct spider_net_card *card)
+{
+ u32 regvalue;
+ unsigned long flags;
+
+ spin_lock_irqsave(&card->intmask_lock, flags);
+ regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK);
+ regvalue &= ~SPIDER_NET_RXINT;
+ spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
+ spin_unlock_irqrestore(&card->intmask_lock, flags);
+}
+
+/** spider_net_write_phy - write to phy register
+ * @netdev: adapter to be written to
+ * @mii_id: id of MII
+ * @reg: PHY register
+ * @val: value to be written to phy register
+ *
+ * spider_net_write_phy_register writes to an arbitrary PHY
+ * register via the spider GPCWOPCMD register. We assume the queue does
+ * not run full (not more than 15 commands outstanding).
+ **/
+static void
+spider_net_write_phy(struct net_device *netdev, int mii_id,
+ int reg, int val)
+{
+ struct spider_net_card *card = netdev_priv(netdev);
+ u32 writevalue;
+
+ writevalue = ((u32)mii_id << 21) |
+ ((u32)reg << 16) | ((u32)val);
+
+ spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue);
+}
+
+/** spider_net_read_phy - read from phy register
+ * @netdev: network device to be read from
+ * @mii_id: id of MII
+ * @reg: PHY register
+ *
+ * Returns value read from PHY register
+ *
+ * spider_net_write_phy reads from an arbitrary PHY
+ * register via the spider GPCROPCMD register
+ **/
+static int
+spider_net_read_phy(struct net_device *netdev, int mii_id, int reg)
+{
+ struct spider_net_card *card = netdev_priv(netdev);
+ u32 readvalue;
+
+ readvalue = ((u32)mii_id << 21) | ((u32)reg << 16);
+ spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue);
+
+ /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
+ * interrupt, as we poll for the completion of the read operation
+ * in spider_net_read_phy. Should take about 50 us */
+ do {
+ readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD);
+ } while (readvalue & SPIDER_NET_GPREXEC);
+
+ readvalue &= SPIDER_NET_GPRDAT_MASK;
+
+ return readvalue;
+}
+
+/**
+ * spider_net_rx_irq_on - switch on rx irq on this spider card
+ * @card: device structure
+ *
+ * switches on rx irq by enabling them in the GHIINTnMSK register
+ */
+static void
+spider_net_rx_irq_on(struct spider_net_card *card)
+{
+ u32 regvalue;
+ unsigned long flags;
+
+ spin_lock_irqsave(&card->intmask_lock, flags);
+ regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK);
+ regvalue |= SPIDER_NET_RXINT;
+ spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
+ spin_unlock_irqrestore(&card->intmask_lock, flags);
+}
+
+/**
+ * spider_net_tx_irq_off - switch off tx irq on this spider card
+ * @card: device structure
+ *
+ * switches off tx irq by masking them out in the GHIINTnMSK register
+ */
+static void
+spider_net_tx_irq_off(struct spider_net_card *card)
+{
+ u32 regvalue;
+ unsigned long flags;
+
+ spin_lock_irqsave(&card->intmask_lock, flags);
+ regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK);
+ regvalue &= ~SPIDER_NET_TXINT;
+ spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
+ spin_unlock_irqrestore(&card->intmask_lock, flags);
+}
+
+/**
+ * spider_net_tx_irq_on - switch on tx irq on this spider card
+ * @card: device structure
+ *
+ * switches on tx irq by enabling them in the GHIINTnMSK register
+ */
+static void
+spider_net_tx_irq_on(struct spider_net_card *card)
+{
+ u32 regvalue;
+ unsigned long flags;
+
+ spin_lock_irqsave(&card->intmask_lock, flags);
+ regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK);
+ regvalue |= SPIDER_NET_TXINT;
+ spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
+ spin_unlock_irqrestore(&card->intmask_lock, flags);
+}
+
+/**
+ * spider_net_set_promisc - sets the unicast address or the promiscuous mode
+ * @card: card structure
+ *
+ * spider_net_set_promisc sets the unicast destination address filter and
+ * thus either allows for non-promisc mode or promisc mode
+ */
+static void
+spider_net_set_promisc(struct spider_net_card *card)
+{
+ u32 macu, macl;
+ struct net_device *netdev = card->netdev;
+
+ if (netdev->flags & IFF_PROMISC) {
+ /* clear destination entry 0 */
+ spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0);
+ spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0);
+ spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
+ SPIDER_NET_PROMISC_VALUE);
+ } else {
+ macu = netdev->dev_addr[0];
+ macu <<= 8;
+ macu |= netdev->dev_addr[1];
+ memcpy(&macl, &netdev->dev_addr[2], sizeof(macl));
+
+ macu |= SPIDER_NET_UA_DESCR_VALUE;
+ spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu);
+ spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl);
+ spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
+ SPIDER_NET_NONPROMISC_VALUE);
+ }
+}
+
+/**
+ * spider_net_get_mac_address - read mac address from spider card
+ * @card: device structure
+ *
+ * reads MAC address from GMACUNIMACU and GMACUNIMACL registers
+ */
+static int
+spider_net_get_mac_address(struct net_device *netdev)
+{
+ struct spider_net_card *card = netdev_priv(netdev);
+ u32 macl, macu;
+
+ macl = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACL);
+ macu = spider_net_read_reg(card, SPIDER_NET_GMACUNIMACU);
+
+ netdev->dev_addr[0] = (macu >> 24) & 0xff;
+ netdev->dev_addr[1] = (macu >> 16) & 0xff;
+ netdev->dev_addr[2] = (macu >> 8) & 0xff;
+ netdev->dev_addr[3] = macu & 0xff;
+ netdev->dev_addr[4] = (macl >> 8) & 0xff;
+ netdev->dev_addr[5] = macl & 0xff;
+
+ if (!is_valid_ether_addr(&netdev->dev_addr[0]))
+ return -EINVAL;
+
+ return 0;
+}
+
+/**
+ * spider_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 spider_net_descr_status
+spider_net_get_descr_status(struct spider_net_descr *descr)
+{
+ u32 cmd_status;
+ rmb();
+ cmd_status = descr->dmac_cmd_status;
+ rmb();
+ cmd_status >>= SPIDER_NET_DESCR_IND_PROC_SHIFT;
+ /* no need to mask out any bits, as cmd_status is 32 bits wide only
+ * (and unsigned) */
+ return cmd_status;
+}
+
+/**
+ * spider_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
+spider_net_set_descr_status(struct spider_net_descr *descr,
+ enum spider_net_descr_status status)
+{
+ u32 cmd_status;
+ /* read the status */
+ mb();
+ cmd_status = descr->dmac_cmd_status;
+ /* clean the upper 4 bits */
+ cmd_status &= SPIDER_NET_DESCR_IND_PROC_MASKO;
+ /* add the status to it */
+ cmd_status |= ((u32)status)<<SPIDER_NET_DESCR_IND_PROC_SHIFT;
+ /* and write it back */
+ descr->dmac_cmd_status = cmd_status;
+ wmb();
+}
+
+/**
+ * spider_net_free_chain - free descriptor chain
+ * @card: card structure
+ * @chain: address of chain
+ *
+ */
+static void
+spider_net_free_chain(struct spider_net_card *card,
+ struct spider_net_descr_chain *chain)
+{
+ struct spider_net_descr *descr;
+
+ for (descr = chain->tail; !descr->bus_addr; descr = descr->next) {
+ pci_unmap_single(card->pdev, descr->bus_addr,
+ SPIDER_NET_DESCR_SIZE, PCI_DMA_BIDIRECTIONAL);
+ descr->bus_addr = 0;
+ }
+}
+
+/**
+ * spider_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
+spider_net_init_chain(struct spider_net_card *card,
+ struct spider_net_descr_chain *chain,
+ struct spider_net_descr *start_descr, int no)
+{
+ int i;
+ struct spider_net_descr *descr;
+
+ spin_lock_init(&card->chain_lock);
+
+ descr = start_descr;
+ memset(descr, 0, sizeof(*descr) * no);
+
+ /* set up the hardware pointers in each descriptor */
+ for (i=0; i<no; i++, descr++) {
+ spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
+
+ descr->bus_addr =
+ pci_map_single(card->pdev, descr,
+ SPIDER_NET_DESCR_SIZE,
+ PCI_DMA_BIDIRECTIONAL);
+
+ if (descr->bus_addr == DMA_ERROR_CODE)
+ goto iommu_error;
+
+ descr->next = descr + 1;
+ descr->prev = descr - 1;
+
+ }
+ /* do actual circular list */
+ (descr-1)->next = start_descr;
+ start_descr->prev = descr-1;
+
+ 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;
+
+ return 0;
+
+iommu_error:
+ descr = start_descr;
+ for (i=0; i < no; i++, descr++)
+ if (descr->bus_addr)
+ pci_unmap_single(card->pdev, descr->bus_addr,
+ SPIDER_NET_DESCR_SIZE, PCI_DMA_BIDIRECTIONAL);
+ return -ENOMEM;
+}
+
+/**
+ * spider_net_free_rx_chain_contents - frees descr contents in rx chain
+ * @card: card structure
+ *
+ * returns 0 on success, <0 on failure
+ */
+static void
+spider_net_free_rx_chain_contents(struct spider_net_card *card)
+{
+ struct spider_net_descr *descr;
+
+ descr = card->rx_chain.head;
+ while (descr->next != card->rx_chain.head) {
+ if (descr->skb) {
+ dev_kfree_skb(descr->skb);
+ pci_unmap_single(card->pdev, descr->buf_addr,
+ SPIDER_NET_MAX_MTU,
+ PCI_DMA_BIDIRECTIONAL);
+ }
+ descr = descr->next;
+ }
+}
+
+/**
+ * spider_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
+spider_net_prepare_rx_descr(struct spider_net_card *card,
+ struct spider_net_descr *descr)
+{
+ int error = 0;
+ int offset;
+ int bufsize;
+
+ /* we need to round up the buffer size to a multiple of 128 */
+ bufsize = (SPIDER_NET_MAX_MTU + SPIDER_NET_RXBUF_ALIGN - 1) &
+ (~(SPIDER_NET_RXBUF_ALIGN - 1));
+
+ /* and we need to have it 128 byte aligned, therefore we allocate a
+ * bit more */
+ /* allocate an skb */
+ descr->skb = dev_alloc_skb(bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
+ if (!descr->skb) {
+ if (net_ratelimit())
+ if (netif_msg_rx_err(card))
+ pr_err("Not enough memory to allocate "
+ "rx buffer\n");
+ return -ENOMEM;
+ }
+ descr->buf_size = bufsize;
+ descr->result_size = 0;
+ descr->valid_size = 0;
+ descr->data_status = 0;
+ descr->data_error = 0;
+
+ offset = ((unsigned long)descr->skb->data) &
+ (SPIDER_NET_RXBUF_ALIGN - 1);
+ if (offset)
+ skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
+ /* io-mmu-map the skb */
+ descr->buf_addr = pci_map_single(card->pdev, descr->skb->data,
+ SPIDER_NET_MAX_MTU,
+ PCI_DMA_BIDIRECTIONAL);
+ if (descr->buf_addr == DMA_ERROR_CODE) {
+ dev_kfree_skb_any(descr->skb);
+ if (netif_msg_rx_err(card))
+ pr_err("Could not iommu-map rx buffer\n");
+ spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
+ } else {
+ descr->dmac_cmd_status = SPIDER_NET_DMAC_RX_CARDOWNED;
+ }
+
+ return error;
+}
+
+/**
+ * spider_net_enable_rxctails - sets RX dmac chain tail addresses
+ * @card: card structure
+ *
+ * spider_net_enable_rxctails sets the RX DMAC chain tail adresses in the
+ * chip by writing to the appropriate register. DMA is enabled in
+ * spider_net_enable_rxdmac.
+ */
+static void
+spider_net_enable_rxchtails(struct spider_net_card *card)
+{
+ /* assume chain is aligned correctly */
+ spider_net_write_reg(card, SPIDER_NET_GDADCHA ,
+ card->rx_chain.tail->bus_addr);
+}
+
+/**
+ * spider_net_enable_rxdmac - enables a receive DMA controller
+ * @card: card structure
+ *
+ * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
+ * in the GDADMACCNTR register
+ */
+static void
+spider_net_enable_rxdmac(struct spider_net_card *card)
+{
+ spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
+ SPIDER_NET_DMA_RX_VALUE);
+}
+
+/**
+ * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
+ * @card: card structure
+ *
+ * refills descriptors in all chains (last used chain first): allocates skbs
+ * and iommu-maps them.
+ */
+static void
+spider_net_refill_rx_chain(struct spider_net_card *card)
+{
+ struct spider_net_descr_chain *chain;
+ int count = 0;
+ unsigned long flags;
+
+ chain = &card->rx_chain;
+
+ spin_lock_irqsave(&card->chain_lock, flags);
+ while (spider_net_get_descr_status(chain->head) ==
+ SPIDER_NET_DESCR_NOT_IN_USE) {
+ if (spider_net_prepare_rx_descr(card, chain->head))
+ break;
+ count++;
+ chain->head = chain->head->next;
+ }
+ spin_unlock_irqrestore(&card->chain_lock, flags);
+
+ /* could be optimized, only do that, if we know the DMA processing
+ * has terminated */
+ if (count)
+ spider_net_enable_rxdmac(card);
+}
+
+/**
+ * spider_net_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
+ * @card: card structure
+ *
+ * returns 0 on success, <0 on failure
+ */
+static int
+spider_net_alloc_rx_skbs(struct spider_net_card *card)
+{
+ int result;
+ struct spider_net_descr_chain *chain;
+
+ result = -ENOMEM;
+
+ chain = &card->rx_chain;
+ /* put at least one buffer into the chain. if this fails,
+ * we've got a problem. if not, spider_net_refill_rx_chain
+ * will do the rest at the end of this function */
+ if (spider_net_prepare_rx_descr(card, chain->head))
+ goto error;
+ else
+ chain->head = chain->head->next;
+
+ /* this will allocate the rest of the rx buffers; if not, it's
+ * business as usual later on */
+ spider_net_refill_rx_chain(card);
+ return 0;
+
+error:
+ spider_net_free_rx_chain_contents(card);
+ return result;
+}
+
+/**
+ * spider_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
+spider_net_release_tx_descr(struct spider_net_card *card,
+ struct spider_net_descr *descr)
+{
+ struct sk_buff *skb;
+
+ /* unmap the skb */
+ skb = descr->skb;
+ pci_unmap_single(card->pdev, descr->buf_addr, skb->len,
+ PCI_DMA_BIDIRECTIONAL);
+
+ dev_kfree_skb_any(skb);
+
+ /* set status to not used */
+ spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
+}
+
+/**
+ * spider_net_release_tx_chain - processes sent tx descriptors
+ * @card: adapter structure
+ * @brutal: if set, don't care about whether descriptor seems to be in use
+ *
+ * releases the tx descriptors that spider has finished with (if non-brutal)
+ * or simply release tx descriptors (if brutal)
+ */
+static void
+spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
+{
+ struct spider_net_descr_chain *tx_chain = &card->tx_chain;
+ enum spider_net_descr_status status;
+
+ spider_net_tx_irq_off(card);
+
+ /* no lock for chain needed, if this is only executed once at a time */
+again:
+ for (;;) {
+ status = spider_net_get_descr_status(tx_chain->tail);
+ switch (status) {
+ case SPIDER_NET_DESCR_CARDOWNED:
+ if (!brutal) goto out;
+ /* fallthrough, if we release the descriptors
+ * brutally (then we don't care about
+ * SPIDER_NET_DESCR_CARDOWNED) */
+ case SPIDER_NET_DESCR_RESPONSE_ERROR:
+ case SPIDER_NET_DESCR_PROTECTION_ERROR:
+ case SPIDER_NET_DESCR_FORCE_END:
+ if (netif_msg_tx_err(card))
+ pr_err("%s: forcing end of tx descriptor "
+ "with status x%02x\n",
+ card->netdev->name, status);
+ card->netdev_stats.tx_dropped++;
+ break;
+
+ case SPIDER_NET_DESCR_COMPLETE:
+ card->netdev_stats.tx_packets++;
+ card->netdev_stats.tx_bytes +=
+ tx_chain->tail->skb->len;
+ break;
+
+ default: /* any other value (== SPIDER_NET_DESCR_NOT_IN_USE) */
+ goto out;
+ }
+ spider_net_release_tx_descr(card, tx_chain->tail);
+ tx_chain->tail = tx_chain->tail->next;
+ }
+out:
+ netif_wake_queue(card->netdev);
+
+ if (!brutal) {
+ /* switch on tx irqs (while we are still in the interrupt
+ * handler, so we don't get an interrupt), check again
+ * for done descriptors. This results in fewer interrupts */
+ spider_net_tx_irq_on(card);
+ status = spider_net_get_descr_status(tx_chain->tail);
+ switch (status) {
+ case SPIDER_NET_DESCR_RESPONSE_ERROR:
+ case SPIDER_NET_DESCR_PROTECTION_ERROR:
+ case SPIDER_NET_DESCR_FORCE_END:
+ case SPIDER_NET_DESCR_COMPLETE:
+ goto again;
+ default:
+ break;
+ }
+ }
+
+}
+
+/**
+ * spider_net_get_multicast_hash - generates hash for multicast filter table
+ * @addr: multicast address
+ *
+ * returns the hash value.
+ *
+ * spider_net_get_multicast_hash calculates a hash value for a given multicast
+ * address, that is used to set the multicast filter tables
+ */
+static u8
+spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
+{
+ /* FIXME: an addr of 01:00:5e:00:00:01 must result in 0xa9,
+ * ff:ff:ff:ff:ff:ff must result in 0xfd */
+ u32 crc;
+ u8 hash;
+
+ crc = crc32_be(~0, addr, netdev->addr_len);
+
+ hash = (crc >> 27);
+ hash <<= 3;
+ hash |= crc & 7;
+
+ return hash;
+}
+
+/**
+ * spider_net_set_multi - sets multicast addresses and promisc flags
+ * @netdev: interface device structure
+ *
+ * spider_net_set_multi configures multicast addresses as needed for the
+ * netdev interface. It also sets up multicast, allmulti and promisc
+ * flags appropriately
+ */
+static void
+spider_net_set_multi(struct net_device *netdev)
+{
+ struct dev_mc_list *mc;
+ u8 hash;
+ int i;
+ u32 reg;
+ struct spider_net_card *card = netdev_priv(netdev);
+ unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] =
+ {0, };
+
+ spider_net_set_promisc(card);
+
+ if (netdev->flags & IFF_ALLMULTI) {
+ for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) {
+ set_bit(i, bitmask);
+ }
+ goto write_hash;
+ }
+
+ /* well, we know, what the broadcast hash value is: it's xfd
+ hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */
+ set_bit(0xfd, bitmask);
+
+ for (mc = netdev->mc_list; mc; mc = mc->next) {
+ hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr);
+ set_bit(hash, bitmask);
+ }
+
+write_hash:
+ for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) {
+ reg = 0;
+ if (test_bit(i * 4, bitmask))
+ reg += 0x08;
+ reg <<= 8;
+ if (test_bit(i * 4 + 1, bitmask))
+ reg += 0x08;
+ reg <<= 8;
+ if (test_bit(i * 4 + 2, bitmask))
+ reg += 0x08;
+ reg <<= 8;
+ if (test_bit(i * 4 + 3, bitmask))
+ reg += 0x08;
+
+ spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg);
+ }
+}
+
+/**
+ * spider_net_disable_rxdmac - disables the receive DMA controller
+ * @card: card structure
+ *
+ * spider_net_disable_rxdmac terminates processing on the DMA controller by
+ * turing off DMA and issueing a force end
+ */
+static void
+spider_net_disable_rxdmac(struct spider_net_card *card)
+{
+ spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
+ SPIDER_NET_DMA_RX_FEND_VALUE);
+}
+
+/**
+ * spider_net_stop - called upon ifconfig down
+ * @netdev: interface device structure
+ *
+ * always returns 0
+ */
+int
+spider_net_stop(struct net_device *netdev)
+{
+ struct spider_net_card *card = netdev_priv(netdev);
+
+ netif_poll_disable(netdev);
+ netif_carrier_off(netdev);
+ netif_stop_queue(netdev);
+
+ /* disable/mask all interrupts */
+ spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
+ spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
+ spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
+
+ spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
+ SPIDER_NET_DMA_TX_FEND_VALUE);
+
+ /* turn off DMA, force end */
+ spider_net_disable_rxdmac(card);
+
+ /* release chains */
+ spider_net_release_tx_chain(card, 1);
+
+ /* switch off card */
+ spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
+ SPIDER_NET_CKRCTRL_STOP_VALUE);
+
+ spider_net_free_chain(card, &card->tx_chain);
+ spider_net_free_chain(card, &card->rx_chain);
+
+ return 0;
+}
+
+/**
+ * spider_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 spider_net_descr *
+spider_net_get_next_tx_descr(struct spider_net_card *card)
+{
+ /* check, if head points to not-in-use descr */
+ if ( spider_net_get_descr_status(card->tx_chain.head) ==
+ SPIDER_NET_DESCR_NOT_IN_USE ) {
+ return card->tx_chain.head;
+ } else {
+ return NULL;
+ }
+}
+
+/**
+ * spider_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
+spider_net_set_txdescr_cmdstat(struct spider_net_descr *descr,
+ struct sk_buff *skb)
+{
+ if (skb->ip_summed != CHECKSUM_HW) {
+ descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_NOCS;
+ return;
+ }
+
+ /* is packet ip?
+ * if yes: tcp? udp? */
+ if (skb->protocol == htons(ETH_P_IP)) {
+ if (skb->nh.iph->protocol == IPPROTO_TCP) {
+ descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_TCPCS;
+ } else if (skb->nh.iph->protocol == IPPROTO_UDP) {
+ descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_UDPCS;
+ } else { /* the stack should checksum non-tcp and non-udp
+ packets on his own: NETIF_F_IP_CSUM */
+ descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_NOCS;
+ }
+ }
+}
+
+/**
+ * spider_net_prepare_tx_descr - fill tx descriptor with skb data
+ * @card: card structure
+ * @descr: descriptor structure to fill out
+ * @skb: packet to use
+ *
+ * returns 0 on success, <0 on failure.
+ *
+ * fills out the descriptor structure with skb data and len. Copies data,
+ * if needed (32bit DMA!)
+ */
+static int
+spider_net_prepare_tx_descr(struct spider_net_card *card,
+ struct spider_net_descr *descr,
+ struct sk_buff *skb)
+{
+ descr->buf_addr = pci_map_single(card->pdev, skb->data,
+ skb->len, PCI_DMA_BIDIRECTIONAL);
+ if (descr->buf_addr == DMA_ERROR_CODE) {
+ if (netif_msg_tx_err(card))
+ pr_err("could not iommu-map packet (%p, %i). "
+ "Dropping packet\n", skb->data, skb->len);
+ return -ENOMEM;
+ }
+
+ descr->buf_size = skb->len;
+ descr->skb = skb;
+ descr->data_status = 0;
+
+ /* make sure the above values are in memory before we change the
+ * status */
+ wmb();
+
+ spider_net_set_txdescr_cmdstat(descr,skb);
+
+ return 0;
+}
+
+/**
+ * spider_net_kick_tx_dma - enables TX DMA processing
+ * @card: card structure
+ * @descr: descriptor address to enable TX processing at
+ *
+ * spider_net_kick_tx_dma writes the current tx chain head as start address
+ * of the tx descriptor chain and enables the transmission DMA engine
+ */
+static void
+spider_net_kick_tx_dma(struct spider_net_card *card,
+ struct spider_net_descr *descr)
+{
+ /* this is the only descriptor in the output chain.
+ * Enable TX DMA */
+
+ spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
+ descr->bus_addr);
+
+ spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
+ SPIDER_NET_DMA_TX_VALUE);
+}
+
+/**
+ * spider_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
+spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
+{
+ struct spider_net_card *card = netdev_priv(netdev);
+ struct spider_net_descr *descr;
+ int result;
+
+ descr = spider_net_get_next_tx_descr(card);
+
+ if (!descr) {
+ netif_stop_queue(netdev);
+
+ descr = spider_net_get_next_tx_descr(card);
+ if (!descr)
+ goto error;
+ else
+ netif_start_queue(netdev);
+ }
+
+ result = spider_net_prepare_tx_descr(card, descr, skb);
+ if (result)
+ goto error;
+
+ card->tx_chain.head = card->tx_chain.head->next;
+
+ /* make sure the status from spider_net_prepare_tx_descr is in
+ * memory before we check out the previous descriptor */
+ wmb();
+
+ if (spider_net_get_descr_status(descr->prev) !=
+ SPIDER_NET_DESCR_CARDOWNED)
+ spider_net_kick_tx_dma(card, descr);
+
+ return NETDEV_TX_OK;
+
+error:
+ card->netdev_stats.tx_dropped++;
+ return NETDEV_TX_LOCKED;
+}
+
+/**
+ * spider_net_do_ioctl - called for device ioctls
+ * @netdev: interface device structure
+ * @ifr: request parameter structure for ioctl
+ * @cmd: command code for ioctl
+ *
+ * returns 0 on success, <0 on failure. Currently, we have no special ioctls.
+ * -EOPNOTSUPP is returned, if an unknown ioctl was requested
+ */
+static int
+spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
+{
+ switch (cmd) {
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+/**
+ * spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
+ * @descr: descriptor to process
+ * @card: card structure
+ *
+ * returns 1 on success, 0 if no packet was passed to the stack
+ *
+ * iommu-unmaps the skb, fills out skb structure and passes the data to the
+ * stack. The descriptor state is not changed.
+ */
+static int
+spider_net_pass_skb_up(struct spider_net_descr *descr,
+ struct spider_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;
+
+ /* check for errors in the data_error flag */
+ if ((data_error & SPIDER_NET_DATA_ERROR_MASK) &&
+ netif_msg_rx_err(card))
+ pr_err("error in received descriptor found, "
+ "data_status=x%08x, data_error=x%08x\n",
+ data_status, data_error);
+
+ /* prepare skb, unmap descriptor */
+ skb = descr->skb;
+ pci_unmap_single(card->pdev, descr->buf_addr, SPIDER_NET_MAX_MTU,
+ PCI_DMA_BIDIRECTIONAL);
+
+ /* the cases we'll throw away the packet immediately */
+ if (data_error & SPIDER_NET_DESTROY_RX_FLAGS)
+ return 0;
+
+ skb->dev = netdev;
+ skb_put(skb, descr->valid_size);
+
+ /* the card seems to add 2 bytes of junk in front
+ * of the ethernet frame */
+#define SPIDER_MISALIGN 2
+ skb_pull(skb, SPIDER_MISALIGN);
+ skb->protocol = eth_type_trans(skb, netdev);
+
+ /* checksum offload */
+ if (card->options.rx_csum) {
+ if ( (data_status & SPIDER_NET_DATA_STATUS_CHK_MASK) &&
+ (!(data_error & SPIDER_NET_DATA_ERROR_CHK_MASK)) )
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ else
+ skb->ip_summed = CHECKSUM_NONE;
+ } else {
+ skb->ip_summed = CHECKSUM_NONE;
+ }
+
+ if (data_status & SPIDER_NET_VLAN_PACKET) {
+ /* further enhancements: HW-accel VLAN
+ * vlan_hwaccel_receive_skb
+ */
+ }
+
+ /* pass skb up to stack */
+ netif_receive_skb(skb);
+
+ /* update netdevice statistics */
+ card->netdev_stats.rx_packets++;
+ card->netdev_stats.rx_bytes += skb->len;
+
+ return 1;
+}
+
+/**
+ * spider_net_decode_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
+spider_net_decode_one_descr(struct spider_net_card *card)
+{
+ enum spider_net_descr_status status;
+ struct spider_net_descr *descr;
+ struct spider_net_descr_chain *chain;
+ int result;
+
+ chain = &card->rx_chain;
+ descr = chain->tail;
+
+ status = spider_net_get_descr_status(descr);
+
+ if (status == SPIDER_NET_DESCR_CARDOWNED) {
+ /* nothing in the descriptor yet */
+ return 0;
+ }
+
+ if (status == SPIDER_NET_DESCR_NOT_IN_USE) {
+ /* not initialized yet, I bet chain->tail == chain->head
+ * and the ring is empty */
+ spider_net_refill_rx_chain(card);
+ return 0;
+ }
+
+ /* descriptor definitively used -- move on head */
+ chain->tail = descr->next;
+
+ result = 0;
+ if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
+ (status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
+ (status == SPIDER_NET_DESCR_FORCE_END) ) {
+ if (netif_msg_rx_err(card))
+ pr_err("%s: dropping RX descriptor with state %d\n",
+ card->netdev->name, status);
+ card->netdev_stats.rx_dropped++;
+ goto refill;
+ }
+
+ if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
+ (status != SPIDER_NET_DESCR_FRAME_END) ) {
+ if (netif_msg_rx_err(card))
+ pr_err("%s: RX descriptor with state %d\n",
+ card->netdev->name, status);
+ goto refill;
+ }
+
+ /* ok, we've got a packet in descr */
+ result = spider_net_pass_skb_up(descr, card);
+refill:
+ spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
+ /* change the descriptor state: */
+ spider_net_refill_rx_chain(card);
+
+ return result;
+}
+
+/**
+ * spider_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.
+ *
+ * spider_net_poll returns all packets from the rx descriptors to the stack
+ * (using netif_receive_skb). If all/enough packets are up, the driver
+ * reenables interrupts and returns 0. If not, 1 is returned.
+ */
+static int
+spider_net_poll(struct net_device *netdev, int *budget)
+{
+ struct spider_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 (spider_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 all packets are in the stack, enable interrupts and return 0 */
+ /* if not, return 1 */
+ if (no_more_packets) {
+ netif_rx_complete(netdev);
+ spider_net_rx_irq_on(card);
+ return 0;
+ }
+
+ return 1;
+}
+
+/**
+ * spider_net_vlan_rx_reg - initializes VLAN structures in the driver and card
+ * @netdev: interface device structure
+ * @grp: vlan_group structure that is registered (NULL on destroying interface)
+ */
+static void
+spider_net_vlan_rx_reg(struct net_device *netdev, struct vlan_group *grp)
+{
+ /* further enhancement... yet to do */
+ return;
+}
+
+/**
+ * spider_net_vlan_rx_add - adds VLAN id to the card filter
+ * @netdev: interface device structure
+ * @vid: VLAN id to add
+ */
+static void
+spider_net_vlan_rx_add(struct net_device *netdev, uint16_t vid)
+{
+ /* further enhancement... yet to do */
+ /* add vid to card's VLAN filter table */
+ return;
+}
+
+/**
+ * spider_net_vlan_rx_kill - removes VLAN id to the card filter
+ * @netdev: interface device structure
+ * @vid: VLAN id to remove
+ */
+static void
+spider_net_vlan_rx_kill(struct net_device *netdev, uint16_t vid)
+{
+ /* further enhancement... yet to do */
+ /* remove vid from card's VLAN filter table */
+}
+
+/**
+ * spider_net_get_stats - get interface statistics
+ * @netdev: interface device structure
+ *
+ * returns the interface statistics residing in the spider_net_card struct
+ */
+static struct net_device_stats *
+spider_net_get_stats(struct net_device *netdev)
+{
+ struct spider_net_card *card = netdev_priv(netdev);
+ struct net_device_stats *stats = &card->netdev_stats;
+ return stats;
+}
+
+/**
+ * spider_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
+spider_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 < SPIDER_NET_MIN_MTU ) ||
+ (new_mtu > SPIDER_NET_MAX_MTU) )
+ return -EINVAL;
+ netdev->mtu = new_mtu;
+ return 0;
+}
+
+/**
+ * spider_net_set_mac - sets the MAC of an interface
+ * @netdev: interface device structure
+ * @ptr: pointer to new MAC address
+ *
+ * Returns 0 on success, <0 on failure. Currently, we don't support this
+ * and will always return EOPNOTSUPP.
+ */
+static int
+spider_net_set_mac(struct net_device *netdev, void *p)
+{
+ struct spider_net_card *card = netdev_priv(netdev);
+ u32 macl, macu;
+ struct sockaddr *addr = p;
+
+ /* GMACTPE and GMACRPE must be off, so we only allow this, if
+ * the device is down */
+ if (netdev->flags & IFF_UP)
+ return -EBUSY;
+
+ if (!is_valid_ether_addr(addr->sa_data))
+ return -EADDRNOTAVAIL;
+
+ macu = (addr->sa_data[0]<<24) + (addr->sa_data[1]<<16) +
+ (addr->sa_data[2]<<8) + (addr->sa_data[3]);
+ macl = (addr->sa_data[4]<<8) + (addr->sa_data[5]);
+ spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
+ spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
+
+ spider_net_set_promisc(card);
+
+ /* look up, whether we have been successful */
+ if (spider_net_get_mac_address(netdev))
+ return -EADDRNOTAVAIL;
+ if (memcmp(netdev->dev_addr,addr->sa_data,netdev->addr_len))
+ return -EADDRNOTAVAIL;
+
+ return 0;
+}
+
+/**
+ * spider_net_enable_txdmac - enables a TX DMA controller
+ * @card: card structure
+ *
+ * spider_net_enable_txdmac enables the TX DMA controller by setting the
+ * descriptor chain tail address
+ */
+static void
+spider_net_enable_txdmac(struct spider_net_card *card)
+{
+ /* assume chain is aligned correctly */
+ spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
+ card->tx_chain.tail->bus_addr);
+}
+
+/**
+ * spider_net_handle_error_irq - handles errors raised by an interrupt
+ * @card: card structure
+ * @status_reg: interrupt status register 0 (GHIINT0STS)
+ *
+ * spider_net_handle_error_irq treats or ignores all error conditions
+ * found when an interrupt is presented
+ */
+static void
+spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg)
+{
+ u32 error_reg1, error_reg2;
+ u32 i;
+ int show_error = 1;
+
+ error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
+ error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
+
+ /* check GHIINT0STS ************************************/
+ if (status_reg)
+ for (i = 0; i < 32; i++)
+ if (status_reg & (1<<i))
+ switch (i)
+ {
+ /* let error_reg1 and error_reg2 evaluation decide, what to do
+ case SPIDER_NET_PHYINT:
+ case SPIDER_NET_GMAC2INT:
+ case SPIDER_NET_GMAC1INT:
+ case SPIDER_NET_GIPSINT:
+ case SPIDER_NET_GFIFOINT:
+ case SPIDER_NET_DMACINT:
+ case SPIDER_NET_GSYSINT:
+ break; */
+
+ case SPIDER_NET_GPWOPCMPINT:
+ /* PHY write operation completed */
+ show_error = 0;
+ break;
+ case SPIDER_NET_GPROPCMPINT:
+ /* PHY read operation completed */
+ /* we don't use semaphores, as we poll for the completion
+ * of the read operation in spider_net_read_phy. Should take
+ * about 50 us */
+ show_error = 0;
+ break;
+ case SPIDER_NET_GPWFFINT:
+ /* PHY command queue full */
+ if (netif_msg_intr(card))
+ pr_err("PHY write queue full\n");
+ show_error = 0;
+ break;
+
+ /* case SPIDER_NET_GRMDADRINT: not used. print a message */
+ /* case SPIDER_NET_GRMARPINT: not used. print a message */
+ /* case SPIDER_NET_GRMMPINT: not used. print a message */
+
+ case SPIDER_NET_GDTDEN0INT:
+ /* someone has set TX_DMA_EN to 0 */
+ show_error = 0;
+ break;
+
+ case SPIDER_NET_GDDDEN0INT: /* fallthrough */
+ case SPIDER_NET_GDCDEN0INT: /* fallthrough */
+ case SPIDER_NET_GDBDEN0INT: /* fallthrough */
+ case SPIDER_NET_GDADEN0INT:
+ /* someone has set RX_DMA_EN to 0 */
+ show_error = 0;
+ break;
+
+ /* RX interrupts */
+ case SPIDER_NET_GDDFDCINT:
+ case SPIDER_NET_GDCFDCINT:
+ case SPIDER_NET_GDBFDCINT:
+ case SPIDER_NET_GDAFDCINT:
+ /* case SPIDER_NET_GDNMINT: not used. print a message */
+ /* case SPIDER_NET_GCNMINT: not used. print a message */
+ /* case SPIDER_NET_GBNMINT: not used. print a message */
+ /* case SPIDER_NET_GANMINT: not used. print a message */
+ /* case SPIDER_NET_GRFNMINT: not used. print a message */
+ show_error = 0;
+ break;
+
+ /* TX interrupts */
+ case SPIDER_NET_GDTFDCINT:
+ show_error = 0;
+ break;
+ case SPIDER_NET_GTTEDINT:
+ show_error = 0;
+ break;
+ case SPIDER_NET_GDTDCEINT:
+ /* chain end. If a descriptor should be sent, kick off
+ * tx dma
+ if (card->tx_chain.tail == card->tx_chain.head)
+ spider_net_kick_tx_dma(card);
+ show_error = 0; */
+ break;
+
+ /* case SPIDER_NET_G1TMCNTINT: not used. print a message */
+ /* case SPIDER_NET_GFREECNTINT: not used. print a message */
+ }
+
+ /* check GHIINT1STS ************************************/
+ if (error_reg1)
+ for (i = 0; i < 32; i++)
+ if (error_reg1 & (1<<i))
+ switch (i)
+ {
+ case SPIDER_NET_GTMFLLINT:
+ if (netif_msg_intr(card))
+ pr_err("Spider TX RAM full\n");
+ show_error = 0;
+ break;
+ case SPIDER_NET_GRMFLLINT:
+ if (netif_msg_intr(card))
+ pr_err("Spider RX RAM full, incoming packets "
+ "might be discarded !\n");
+ netif_rx_schedule(card->netdev);
+ spider_net_enable_rxchtails(card);
+ spider_net_enable_rxdmac(card);
+ break;
+
+ /* case SPIDER_NET_GTMSHTINT: problem, print a message */
+ case SPIDER_NET_GDTINVDINT:
+ /* allrighty. tx from previous descr ok */
+ show_error = 0;
+ break;
+ /* case SPIDER_NET_GRFDFLLINT: print a message down there */
+ /* case SPIDER_NET_GRFCFLLINT: print a message down there */
+ /* case SPIDER_NET_GRFBFLLINT: print a message down there */
+ /* case SPIDER_NET_GRFAFLLINT: print a message down there */
+
+ /* chain end */
+ case SPIDER_NET_GDDDCEINT: /* fallthrough */
+ case SPIDER_NET_GDCDCEINT: /* fallthrough */
+ case SPIDER_NET_GDBDCEINT: /* fallthrough */
+ case SPIDER_NET_GDADCEINT:
+ if (netif_msg_intr(card))
+ pr_err("got descriptor chain end interrupt, "
+ "restarting DMAC %c.\n",
+ 'D'+i-SPIDER_NET_GDDDCEINT);
+ spider_net_refill_rx_chain(card);
+ show_error = 0;
+ break;
+
+ /* invalid descriptor */
+ case SPIDER_NET_GDDINVDINT: /* fallthrough */
+ case SPIDER_NET_GDCINVDINT: /* fallthrough */
+ case SPIDER_NET_GDBINVDINT: /* fallthrough */
+ case SPIDER_NET_GDAINVDINT:
+ /* could happen when rx chain is full */
+ spider_net_refill_rx_chain(card);
+ show_error = 0;
+ break;
+
+ /* case SPIDER_NET_GDTRSERINT: problem, print a message */
+ /* case SPIDER_NET_GDDRSERINT: problem, print a message */
+ /* case SPIDER_NET_GDCRSERINT: problem, print a message */
+ /* case SPIDER_NET_GDBRSERINT: problem, print a message */
+ /* case SPIDER_NET_GDARSERINT: problem, print a message */
+ /* case SPIDER_NET_GDSERINT: problem, print a message */
+ /* case SPIDER_NET_GDTPTERINT: problem, print a message */
+ /* case SPIDER_NET_GDDPTERINT: problem, print a message */
+ /* case SPIDER_NET_GDCPTERINT: problem, print a message */
+ /* case SPIDER_NET_GDBPTERINT: problem, print a message */
+ /* case SPIDER_NET_GDAPTERINT: problem, print a message */
+ default:
+ show_error = 1;
+ break;
+ }
+
+ /* check GHIINT2STS ************************************/
+ if (error_reg2)
+ for (i = 0; i < 32; i++)
+ if (error_reg2 & (1<<i))
+ switch (i)
+ {
+ /* there is nothing we can (want to) do at this time. Log a
+ * message, we can switch on and off the specific values later on
+ case SPIDER_NET_GPROPERINT:
+ case SPIDER_NET_GMCTCRSNGINT:
+ case SPIDER_NET_GMCTLCOLINT:
+ case SPIDER_NET_GMCTTMOTINT:
+ case SPIDER_NET_GMCRCAERINT:
+ case SPIDER_NET_GMCRCALERINT:
+ case SPIDER_NET_GMCRALNERINT:
+ case SPIDER_NET_GMCROVRINT:
+ case SPIDER_NET_GMCRRNTINT:
+ case SPIDER_NET_GMCRRXERINT:
+ case SPIDER_NET_GTITCSERINT:
+ case SPIDER_NET_GTIFMTERINT:
+ case SPIDER_NET_GTIPKTRVKINT:
+ case SPIDER_NET_GTISPINGINT:
+ case SPIDER_NET_GTISADNGINT:
+ case SPIDER_NET_GTISPDNGINT:
+ case SPIDER_NET_GRIFMTERINT:
+ case SPIDER_NET_GRIPKTRVKINT:
+ case SPIDER_NET_GRISPINGINT:
+ case SPIDER_NET_GRISADNGINT:
+ case SPIDER_NET_GRISPDNGINT:
+ break;
+ */
+ default:
+ break;
+ }
+
+ if ((show_error) && (netif_msg_intr(card)))
+ pr_err("Got error interrupt, GHIINT0STS = 0x%08x, "
+ "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n",
+ status_reg, error_reg1, error_reg2);
+
+ /* clear interrupt sources */
+ spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1);
+ spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2);
+}
+
+/**
+ * spider_net_interrupt - interrupt handler for spider_net
+ * @irq: interupt number
+ * @ptr: pointer to net_device
+ * @regs: PU registers
+ *
+ * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no
+ * interrupt found raised by card.
+ *
+ * This is the interrupt handler, that turns off
+ * interrupts for this device and makes the stack poll the driver
+ */
+static irqreturn_t
+spider_net_interrupt(int irq, void *ptr, struct pt_regs *regs)
+{
+ struct net_device *netdev = ptr;
+ struct spider_net_card *card = netdev_priv(netdev);
+ u32 status_reg;
+
+ status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
+
+ if (!status_reg)
+ return IRQ_NONE;
+
+ if (status_reg & SPIDER_NET_TXINT)
+ spider_net_release_tx_chain(card, 0);
+
+ if (status_reg & SPIDER_NET_RXINT ) {
+ spider_net_rx_irq_off(card);
+ netif_rx_schedule(netdev);
+ }
+
+ /* we do this after rx and tx processing, as we want the tx chain
+ * processed to see, whether we should restart tx dma processing */
+ spider_net_handle_error_irq(card, status_reg);
+
+ /* clear interrupt sources */
+ spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
+
+ return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+/**
+ * spider_net_poll_controller - artificial interrupt for netconsole etc.
+ * @netdev: interface device structure
+ *
+ * see Documentation/networking/netconsole.txt
+ */
+static void
+spider_net_poll_controller(struct net_device *netdev)
+{
+ disable_irq(netdev->irq);
+ spider_net_interrupt(netdev->irq, netdev, NULL);
+ enable_irq(netdev->irq);
+}
+#endif /* CONFIG_NET_POLL_CONTROLLER */
+
+/**
+ * spider_net_init_card - initializes the card
+ * @card: card structure
+ *
+ * spider_net_init_card initializes the card so that other registers can
+ * be used
+ */
+static void
+spider_net_init_card(struct spider_net_card *card)
+{
+ spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
+ SPIDER_NET_CKRCTRL_STOP_VALUE);
+
+ spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
+ SPIDER_NET_CKRCTRL_RUN_VALUE);
+}
+
+/**
+ * spider_net_enable_card - enables the card by setting all kinds of regs
+ * @card: card structure
+ *
+ * spider_net_enable_card sets a lot of SMMIO registers to enable the device
+ */
+static void
+spider_net_enable_card(struct spider_net_card *card)
+{
+ int i;
+ /* the following array consists of (register),(value) pairs
+ * that are set in this function. A register of 0 ends the list */
+ u32 regs[][2] = {
+ { SPIDER_NET_GRESUMINTNUM, 0 },
+ { SPIDER_NET_GREINTNUM, 0 },
+
+ /* set interrupt frame number registers */
+ /* clear the single DMA engine registers first */
+ { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
+ { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
+ { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
+ { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE },
+ /* then set, what we really need */
+ { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE },
+
+ /* timer counter registers and stuff */
+ { SPIDER_NET_GFREECNNUM, 0 },
+ { SPIDER_NET_GONETIMENUM, 0 },
+ { SPIDER_NET_GTOUTFRMNUM, 0 },
+
+ /* RX mode setting */
+ { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE },
+ /* TX mode setting */
+ { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE },
+ /* IPSEC mode setting */
+ { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE },
+
+ { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE },
+
+ { SPIDER_NET_GMRWOLCTRL, 0 },
+ { SPIDER_NET_GTESTMD, 0 },
+
+ { SPIDER_NET_GMACINTEN, 0 },
+
+ /* flow control stuff */
+ { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE },
+ { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE },
+
+ { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE },
+ { 0, 0}
+ };
+
+ i = 0;
+ while (regs[i][0]) {
+ spider_net_write_reg(card, regs[i][0], regs[i][1]);
+ i++;
+ }
+
+ /* clear unicast filter table entries 1 to 14 */
+ for (i = 1; i <= 14; i++) {
+ spider_net_write_reg(card,
+ SPIDER_NET_GMRUAFILnR + i * 8,
+ 0x00080000);
+ spider_net_write_reg(card,
+ SPIDER_NET_GMRUAFILnR + i * 8 + 4,
+ 0x00000000);
+ }
+
+ spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000);
+
+ spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE);
+
+ /* set chain tail adress for RX chains and
+ * enable DMA */
+ spider_net_enable_rxchtails(card);
+ spider_net_enable_rxdmac(card);
+
+ spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
+
+ /* set chain tail adress for TX chain */
+ spider_net_enable_txdmac(card);
+
+ spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
+ SPIDER_NET_LENLMT_VALUE);
+ spider_net_write_reg(card, SPIDER_NET_GMACMODE,
+ SPIDER_NET_MACMODE_VALUE);
+ spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
+ SPIDER_NET_OPMODE_VALUE);
+
+ /* set interrupt mask registers */
+ spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK,
+ SPIDER_NET_INT0_MASK_VALUE);
+ spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK,
+ SPIDER_NET_INT1_MASK_VALUE);
+ spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
+ SPIDER_NET_INT2_MASK_VALUE);
+}
+
+/**
+ * spider_net_open - called upon ifonfig up
+ * @netdev: interface device structure
+ *
+ * returns 0 on success, <0 on failure
+ *
+ * spider_net_open allocates all the descriptors and memory needed for
+ * operation, sets up multicast list and enables interrupts
+ */
+int
+spider_net_open(struct net_device *netdev)
+{
+ struct spider_net_card *card = netdev_priv(netdev);
+ int result;
+
+ result = -ENOMEM;
+ if (spider_net_init_chain(card, &card->tx_chain,
+ card->descr, tx_descriptors))
+ goto alloc_tx_failed;
+ if (spider_net_init_chain(card, &card->rx_chain,
+ card->descr + tx_descriptors, rx_descriptors))
+ goto alloc_rx_failed;
+
+ /* allocate rx skbs */
+ if (spider_net_alloc_rx_skbs(card))
+ goto alloc_skbs_failed;
+
+ spider_net_set_multi(netdev);
+
+ /* further enhancement: setup hw vlan, if needed */
+
+ result = -EBUSY;
+ if (request_irq(netdev->irq, spider_net_interrupt,
+ SA_SHIRQ, netdev->name, netdev))
+ goto register_int_failed;
+
+ spider_net_enable_card(card);
+
+ return 0;
+
+register_int_failed:
+ spider_net_free_rx_chain_contents(card);
+alloc_skbs_failed:
+ spider_net_free_chain(card, &card->rx_chain);
+alloc_rx_failed:
+ spider_net_free_chain(card, &card->tx_chain);
+alloc_tx_failed:
+ return result;
+}
+
+/**
+ * spider_net_setup_phy - setup PHY
+ * @card: card structure
+ *
+ * returns 0 on success, <0 on failure
+ *
+ * spider_net_setup_phy is used as part of spider_net_probe. Sets
+ * the PHY to 1000 Mbps
+ **/
+static int
+spider_net_setup_phy(struct spider_net_card *card)
+{
+ struct mii_phy *phy = &card->phy;
+
+ spider_net_write_reg(card, SPIDER_NET_GDTDMASEL,
+ SPIDER_NET_DMASEL_VALUE);
+ spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
+ SPIDER_NET_PHY_CTRL_VALUE);
+ phy->mii_id = 1;
+ phy->dev = card->netdev;
+ phy->mdio_read = spider_net_read_phy;
+ phy->mdio_write = spider_net_write_phy;
+
+ mii_phy_probe(phy, phy->mii_id);
+
+ if (phy->def->ops->setup_forced)
+ phy->def->ops->setup_forced(phy, SPEED_1000, DUPLEX_FULL);
+
+ /* the following two writes could be moved to sungem_phy.c */
+ /* enable fiber mode */
+ spider_net_write_phy(card->netdev, 1, MII_NCONFIG, 0x9020);
+ /* LEDs active in both modes, autosense prio = fiber */
+ spider_net_write_phy(card->netdev, 1, MII_NCONFIG, 0x945f);
+
+ phy->def->ops->read_link(phy);
+ pr_info("Found %s with %i Mbps, %s-duplex.\n", phy->def->name,
+ phy->speed, phy->duplex==1 ? "Full" : "Half");
+
+ return 0;
+}
+
+/**
+ * spider_net_download_firmware - loads firmware into the adapter
+ * @card: card structure
+ * @firmware: firmware pointer
+ *
+ * spider_net_download_firmware loads the firmware opened by
+ * spider_net_init_firmware into the adapter.
+ */
+static void
+spider_net_download_firmware(struct spider_net_card *card,
+ const struct firmware *firmware)
+{
+ int sequencer, i;
+ u32 *fw_ptr = (u32 *)firmware->data;
+
+ /* stop sequencers */
+ spider_net_write_reg(card, SPIDER_NET_GSINIT,
+ SPIDER_NET_STOP_SEQ_VALUE);
+
+ for (sequencer = 0; sequencer < 6; sequencer++) {
+ spider_net_write_reg(card,
+ SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
+ for (i = 0; i < SPIDER_NET_FIRMWARE_LEN; i++) {
+ spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
+ sequencer * 8, *fw_ptr);
+ fw_ptr++;
+ }
+ }
+
+ spider_net_write_reg(card, SPIDER_NET_GSINIT,
+ SPIDER_NET_RUN_SEQ_VALUE);
+}
+
+/**
+ * spider_net_init_firmware - reads in firmware parts
+ * @card: card structure
+ *
+ * Returns 0 on success, <0 on failure
+ *
+ * spider_net_init_firmware opens the sequencer firmware and does some basic
+ * checks. This function opens and releases the firmware structure. A call
+ * to download the firmware is performed before the release.
+ *
+ * Firmware format
+ * ===============
+ * spider_fw.bin is expected to be a file containing 6*1024*4 bytes, 4k being
+ * the program for each sequencer. Use the command
+ * tail -q -n +2 Seq_code1_0x088.txt Seq_code2_0x090.txt \
+ * Seq_code3_0x098.txt Seq_code4_0x0A0.txt Seq_code5_0x0A8.txt \
+ * Seq_code6_0x0B0.txt | xxd -r -p -c4 > spider_fw.bin
+ *
+ * to generate spider_fw.bin, if you have sequencer programs with something
+ * like the following contents for each sequencer:
+ * <ONE LINE COMMENT>
+ * <FIRST 4-BYTES-WORD FOR SEQUENCER>
+ * <SECOND 4-BYTES-WORD FOR SEQUENCER>
+ * ...
+ * <1024th 4-BYTES-WORD FOR SEQUENCER>
+ */
+static int
+spider_net_init_firmware(struct spider_net_card *card)
+{
+ const struct firmware *firmware;
+ int err = -EIO;
+
+ if (request_firmware(&firmware,
+ SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) < 0) {
+ if (netif_msg_probe(card))
+ pr_err("Couldn't read in sequencer data file %s.\n",
+ SPIDER_NET_FIRMWARE_NAME);
+ firmware = NULL;
+ goto out;
+ }
+
+ if (firmware->size != 6 * SPIDER_NET_FIRMWARE_LEN * sizeof(u32)) {
+ if (netif_msg_probe(card))
+ pr_err("Invalid size of sequencer data file %s.\n",
+ SPIDER_NET_FIRMWARE_NAME);
+ goto out;
+ }
+
+ spider_net_download_firmware(card, firmware);
+
+ err = 0;
+out:
+ release_firmware(firmware);
+
+ return err;
+}
+
+/**
+ * spider_net_workaround_rxramfull - work around firmware bug
+ * @card: card structure
+ *
+ * no return value
+ **/
+static void
+spider_net_workaround_rxramfull(struct spider_net_card *card)
+{
+ int i, sequencer = 0;
+
+ /* cancel reset */
+ spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
+ SPIDER_NET_CKRCTRL_RUN_VALUE);
+
+ /* empty sequencer data */
+ for (sequencer = 0; sequencer < 6; sequencer++) {
+ spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
+ sequencer * 8, 0x0);
+ for (i = 0; i < SPIDER_NET_FIRMWARE_LEN; i++) {
+ spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
+ sequencer * 8, 0x0);
+ }
+ }
+
+ /* set sequencer operation */
+ spider_net_write_reg(card, SPIDER_NET_GSINIT, 0x000000fe);
+
+ /* reset */
+ spider_net_write_reg(card, SPIDER_NET_CKRCTRL,
+ SPIDER_NET_CKRCTRL_STOP_VALUE);
+}
+
+/**
+ * spider_net_tx_timeout_task - task scheduled by the watchdog timeout
+ * function (to be called not under interrupt status)
+ * @data: data, is interface device structure
+ *
+ * called as task when tx hangs, resets interface (if interface is up)
+ */
+static void
+spider_net_tx_timeout_task(void *data)
+{
+ struct net_device *netdev = data;
+ struct spider_net_card *card = netdev_priv(netdev);
+
+ if (!(netdev->flags & IFF_UP))
+ goto out;
+
+ netif_device_detach(netdev);
+ spider_net_stop(netdev);
+
+ spider_net_workaround_rxramfull(card);
+ spider_net_init_card(card);
+
+ if (spider_net_setup_phy(card))
+ goto out;
+ if (spider_net_init_firmware(card))
+ goto out;
+
+ spider_net_open(netdev);
+ spider_net_kick_tx_dma(card, card->tx_chain.head);
+ netif_device_attach(netdev);
+
+out:
+ atomic_dec(&card->tx_timeout_task_counter);
+}
+
+/**
+ * spider_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
+spider_net_tx_timeout(struct net_device *netdev)
+{
+ struct spider_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);
+}
+
+/**
+ * spider_net_setup_netdev_ops - initialization of net_device operations
+ * @netdev: net_device structure
+ *
+ * fills out function pointers in the net_device structure
+ */
+static void
+spider_net_setup_netdev_ops(struct net_device *netdev)
+{
+ netdev->open = &spider_net_open;
+ netdev->stop = &spider_net_stop;
+ netdev->hard_start_xmit = &spider_net_xmit;
+ netdev->get_stats = &spider_net_get_stats;
+ netdev->set_multicast_list = &spider_net_set_multi;
+ netdev->set_mac_address = &spider_net_set_mac;
+ netdev->change_mtu = &spider_net_change_mtu;
+ netdev->do_ioctl = &spider_net_do_ioctl;
+ /* tx watchdog */
+ netdev->tx_timeout = &spider_net_tx_timeout;
+ netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
+ /* NAPI */
+ netdev->poll = &spider_net_poll;
+ netdev->weight = SPIDER_NET_NAPI_WEIGHT;
+ /* HW VLAN */
+ netdev->vlan_rx_register = &spider_net_vlan_rx_reg;
+ netdev->vlan_rx_add_vid = &spider_net_vlan_rx_add;
+ netdev->vlan_rx_kill_vid = &spider_net_vlan_rx_kill;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ /* poll controller */
+ netdev->poll_controller = &spider_net_poll_controller;
+#endif /* CONFIG_NET_POLL_CONTROLLER */
+ /* ethtool ops */
+ netdev->ethtool_ops = &spider_net_ethtool_ops;
+}
+
+/**
+ * spider_net_setup_netdev - initialization of net_device
+ * @card: card structure
+ *
+ * Returns 0 on success or <0 on failure
+ *
+ * spider_net_setup_netdev initializes the net_device structure
+ **/
+static int
+spider_net_setup_netdev(struct spider_net_card *card)
+{
+ int result;
+ struct net_device *netdev = card->netdev;
+ struct device_node *dn;
+ struct sockaddr addr;
+ u8 *mac;
+
+ SET_MODULE_OWNER(netdev);
+ SET_NETDEV_DEV(netdev, &card->pdev->dev);
+
+ pci_set_drvdata(card->pdev, netdev);
+ spin_lock_init(&card->intmask_lock);
+ netdev->irq = card->pdev->irq;
+
+ card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
+
+ spider_net_setup_netdev_ops(netdev);
+
+ netdev->features = 0;
+ /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
+ * NETIF_F_HW_VLAN_FILTER */
+
+ netdev->irq = card->pdev->irq;
+
+ dn = pci_device_to_OF_node(card->pdev);
+ mac = (u8 *)get_property(dn, "local-mac-address", NULL);
+ memcpy(addr.sa_data, mac, ETH_ALEN);
+
+ result = spider_net_set_mac(netdev, &addr);
+ if ((result) && (netif_msg_probe(card)))
+ pr_err("Failed to set MAC address: %i\n", result);
+
+ result = register_netdev(netdev);
+ if (result) {
+ if (netif_msg_probe(card))
+ pr_err("Couldn't register net_device: %i\n",
+ result);
+ return result;
+ }
+
+ if (netif_msg_probe(card))
+ pr_info("Initialized device %s.\n", netdev->name);
+
+ return 0;
+}
+
+/**
+ * spider_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 spider_net_card *
+spider_net_alloc_card(void)
+{
+ struct net_device *netdev;
+ struct spider_net_card *card;
+ size_t alloc_size;
+
+ alloc_size = sizeof (*card) +
+ sizeof (struct spider_net_descr) * rx_descriptors +
+ sizeof (struct spider_net_descr) * tx_descriptors;
+ netdev = alloc_etherdev(alloc_size);
+ if (!netdev)
+ return NULL;
+
+ card = netdev_priv(netdev);
+ card->netdev = netdev;
+ card->msg_enable = SPIDER_NET_DEFAULT_MSG;
+ INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task, netdev);
+ init_waitqueue_head(&card->waitq);
+ atomic_set(&card->tx_timeout_task_counter, 0);
+
+ return card;
+}
+
+/**
+ * spider_net_undo_pci_setup - releases PCI ressources
+ * @card: card structure
+ *
+ * spider_net_undo_pci_setup releases the mapped regions
+ */
+static void
+spider_net_undo_pci_setup(struct spider_net_card *card)
+{
+ iounmap(card->regs);
+ pci_release_regions(card->pdev);
+}
+
+/**
+ * spider_net_setup_pci_dev - sets up the device in terms of PCI operations
+ * @card: card structure
+ * @pdev: PCI device
+ *
+ * Returns the card structure or NULL if any errors occur
+ *
+ * spider_net_setup_pci_dev initializes pdev and together with the
+ * functions called in spider_net_open configures the device so that
+ * data can be transferred over it
+ * The net_device structure is attached to the card structure, if the
+ * function returns without error.
+ **/
+static struct spider_net_card *
+spider_net_setup_pci_dev(struct pci_dev *pdev)
+{
+ struct spider_net_card *card;
+ unsigned long mmio_start, mmio_len;
+
+ if (pci_enable_device(pdev)) {
+ pr_err("Couldn't enable PCI device\n");
+ return NULL;
+ }
+
+ if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
+ pr_err("Couldn't find proper PCI device base address.\n");
+ goto out_disable_dev;
+ }
+
+ if (pci_request_regions(pdev, spider_net_driver_name)) {
+ pr_err("Couldn't obtain PCI resources, aborting.\n");
+ goto out_disable_dev;
+ }
+
+ pci_set_master(pdev);
+
+ card = spider_net_alloc_card();
+ if (!card) {
+ pr_err("Couldn't allocate net_device structure, "
+ "aborting.\n");
+ goto out_release_regions;
+ }
+ card->pdev = pdev;
+
+ /* fetch base address and length of first resource */
+ mmio_start = pci_resource_start(pdev, 0);
+ mmio_len = pci_resource_len(pdev, 0);
+
+ card->netdev->mem_start = mmio_start;
+ card->netdev->mem_end = mmio_start + mmio_len;
+ card->regs = ioremap(mmio_start, mmio_len);
+
+ if (!card->regs) {
+ pr_err("Couldn't obtain PCI resources, aborting.\n");
+ goto out_release_regions;
+ }
+
+ return card;
+
+out_release_regions:
+ pci_release_regions(pdev);
+out_disable_dev:
+ pci_disable_device(pdev);
+ pci_set_drvdata(pdev, NULL);
+ return NULL;
+}
+
+/**
+ * spider_net_probe - initialization of a device
+ * @pdev: PCI device
+ * @ent: entry in the device id list
+ *
+ * Returns 0 on success, <0 on failure
+ *
+ * spider_net_probe initializes pdev and registers a net_device
+ * structure for it. After that, the device can be ifconfig'ed up
+ **/
+static int __devinit
+spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+ int err = -EIO;
+ struct spider_net_card *card;
+
+ card = spider_net_setup_pci_dev(pdev);
+ if (!card)
+ goto out;
+
+ spider_net_workaround_rxramfull(card);
+ spider_net_init_card(card);
+
+ err = spider_net_setup_phy(card);
+ if (err)
+ goto out_undo_pci;
+
+ err = spider_net_init_firmware(card);
+ if (err)
+ goto out_undo_pci;
+
+ err = spider_net_setup_netdev(card);
+ if (err)
+ goto out_undo_pci;
+
+ return 0;
+
+out_undo_pci:
+ spider_net_undo_pci_setup(card);
+ free_netdev(card->netdev);
+out:
+ return err;
+}
+
+/**
+ * spider_net_remove - removal of a device
+ * @pdev: PCI device
+ *
+ * Returns 0 on success, <0 on failure
+ *
+ * spider_net_remove is called to remove the device and unregisters the
+ * net_device
+ **/
+static void __devexit
+spider_net_remove(struct pci_dev *pdev)
+{
+ struct net_device *netdev;
+ struct spider_net_card *card;
+
+ netdev = pci_get_drvdata(pdev);
+ card = netdev_priv(netdev);
+
+ wait_event(card->waitq,
+ atomic_read(&card->tx_timeout_task_counter) == 0);
+
+ unregister_netdev(netdev);
+ spider_net_undo_pci_setup(card);
+ free_netdev(netdev);
+
+ free_irq(to_pci_dev(netdev->class_dev.dev)->irq, netdev);
+}
+
+static struct pci_driver spider_net_driver = {
+ .owner = THIS_MODULE,
+ .name = spider_net_driver_name,
+ .id_table = spider_net_pci_tbl,
+ .probe = spider_net_probe,
+ .remove = __devexit_p(spider_net_remove)
+};
+
+/**
+ * spider_net_init - init function when the driver is loaded
+ *
+ * spider_net_init registers the device driver
+ */
+static int __init spider_net_init(void)
+{
+ if (rx_descriptors < SPIDER_NET_RX_DESCRIPTORS_MIN) {
+ rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MIN;
+ pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
+ }
+ if (rx_descriptors > SPIDER_NET_RX_DESCRIPTORS_MAX) {
+ rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_MAX;
+ pr_info("adjusting rx descriptors to %i.\n", rx_descriptors);
+ }
+ if (tx_descriptors < SPIDER_NET_TX_DESCRIPTORS_MIN) {
+ tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MIN;
+ pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
+ }
+ if (tx_descriptors > SPIDER_NET_TX_DESCRIPTORS_MAX) {
+ tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_MAX;
+ pr_info("adjusting tx descriptors to %i.\n", tx_descriptors);
+ }
+
+ return pci_register_driver(&spider_net_driver);
+}
+
+/**
+ * spider_net_cleanup - exit function when driver is unloaded
+ *
+ * spider_net_cleanup unregisters the device driver
+ */
+static void __exit spider_net_cleanup(void)
+{
+ pci_unregister_driver(&spider_net_driver);
+}
+
+module_init(spider_net_init);
+module_exit(spider_net_cleanup);
--- /dev/null
+/*
+ * Network device driver for Cell Processor-Based Blade
+ *
+ * (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 _SPIDER_NET_H
+#define _SPIDER_NET_H
+
+#include "sungem_phy.h"
+
+extern int spider_net_stop(struct net_device *netdev);
+extern int spider_net_open(struct net_device *netdev);
+
+extern struct ethtool_ops spider_net_ethtool_ops;
+
+extern char spider_net_driver_name[];
+
+#define SPIDER_NET_MAX_MTU 2308
+#define SPIDER_NET_MIN_MTU 64
+
+#define SPIDER_NET_RXBUF_ALIGN 128
+
+#define SPIDER_NET_RX_DESCRIPTORS_DEFAULT 64
+#define SPIDER_NET_RX_DESCRIPTORS_MIN 16
+#define SPIDER_NET_RX_DESCRIPTORS_MAX 256
+
+#define SPIDER_NET_TX_DESCRIPTORS_DEFAULT 64
+#define SPIDER_NET_TX_DESCRIPTORS_MIN 16
+#define SPIDER_NET_TX_DESCRIPTORS_MAX 256
+
+#define SPIDER_NET_RX_CSUM_DEFAULT 1
+
+#define SPIDER_NET_WATCHDOG_TIMEOUT 5*HZ
+#define SPIDER_NET_NAPI_WEIGHT 64
+
+#define SPIDER_NET_FIRMWARE_LEN 1024
+#define SPIDER_NET_FIRMWARE_NAME "spider_fw.bin"
+
+/** spider_net SMMIO registers */
+#define SPIDER_NET_GHIINT0STS 0x00000000
+#define SPIDER_NET_GHIINT1STS 0x00000004
+#define SPIDER_NET_GHIINT2STS 0x00000008
+#define SPIDER_NET_GHIINT0MSK 0x00000010
+#define SPIDER_NET_GHIINT1MSK 0x00000014
+#define SPIDER_NET_GHIINT2MSK 0x00000018
+
+#define SPIDER_NET_GRESUMINTNUM 0x00000020
+#define SPIDER_NET_GREINTNUM 0x00000024
+
+#define SPIDER_NET_GFFRMNUM 0x00000028
+#define SPIDER_NET_GFAFRMNUM 0x0000002c
+#define SPIDER_NET_GFBFRMNUM 0x00000030
+#define SPIDER_NET_GFCFRMNUM 0x00000034
+#define SPIDER_NET_GFDFRMNUM 0x00000038
+
+/* clear them (don't use it) */
+#define SPIDER_NET_GFREECNNUM 0x0000003c
+#define SPIDER_NET_GONETIMENUM 0x00000040
+
+#define SPIDER_NET_GTOUTFRMNUM 0x00000044
+
+#define SPIDER_NET_GTXMDSET 0x00000050
+#define SPIDER_NET_GPCCTRL 0x00000054
+#define SPIDER_NET_GRXMDSET 0x00000058
+#define SPIDER_NET_GIPSECINIT 0x0000005c
+#define SPIDER_NET_GFTRESTRT 0x00000060
+#define SPIDER_NET_GRXDMAEN 0x00000064
+#define SPIDER_NET_GMRWOLCTRL 0x00000068
+#define SPIDER_NET_GPCWOPCMD 0x0000006c
+#define SPIDER_NET_GPCROPCMD 0x00000070
+#define SPIDER_NET_GTTFRMCNT 0x00000078
+#define SPIDER_NET_GTESTMD 0x0000007c
+
+#define SPIDER_NET_GSINIT 0x00000080
+#define SPIDER_NET_GSnPRGADR 0x00000084
+#define SPIDER_NET_GSnPRGDAT 0x00000088
+
+#define SPIDER_NET_GMACOPEMD 0x00000100
+#define SPIDER_NET_GMACLENLMT 0x00000108
+#define SPIDER_NET_GMACINTEN 0x00000118
+#define SPIDER_NET_GMACPHYCTRL 0x00000120
+
+#define SPIDER_NET_GMACAPAUSE 0x00000154
+#define SPIDER_NET_GMACTXPAUSE 0x00000164
+
+#define SPIDER_NET_GMACMODE 0x000001b0
+#define SPIDER_NET_GMACBSTLMT 0x000001b4
+
+#define SPIDER_NET_GMACUNIMACU 0x000001c0
+#define SPIDER_NET_GMACUNIMACL 0x000001c8
+
+#define SPIDER_NET_GMRMHFILnR 0x00000400
+#define SPIDER_NET_MULTICAST_HASHES 256
+
+#define SPIDER_NET_GMRUAFILnR 0x00000500
+#define SPIDER_NET_GMRUA0FIL15R 0x00000578
+
+/* RX DMA controller registers, all 0x00000a.. are for DMA controller A,
+ * 0x00000b.. for DMA controller B, etc. */
+#define SPIDER_NET_GDADCHA 0x00000a00
+#define SPIDER_NET_GDADMACCNTR 0x00000a04
+#define SPIDER_NET_GDACTDPA 0x00000a08
+#define SPIDER_NET_GDACTDCNT 0x00000a0c
+#define SPIDER_NET_GDACDBADDR 0x00000a20
+#define SPIDER_NET_GDACDBSIZE 0x00000a24
+#define SPIDER_NET_GDACNEXTDA 0x00000a28
+#define SPIDER_NET_GDACCOMST 0x00000a2c
+#define SPIDER_NET_GDAWBCOMST 0x00000a30
+#define SPIDER_NET_GDAWBRSIZE 0x00000a34
+#define SPIDER_NET_GDAWBVSIZE 0x00000a38
+#define SPIDER_NET_GDAWBTRST 0x00000a3c
+#define SPIDER_NET_GDAWBTRERR 0x00000a40
+
+/* TX DMA controller registers */
+#define SPIDER_NET_GDTDCHA 0x00000e00
+#define SPIDER_NET_GDTDMACCNTR 0x00000e04
+#define SPIDER_NET_GDTCDPA 0x00000e08
+#define SPIDER_NET_GDTDMASEL 0x00000e14
+
+#define SPIDER_NET_ECMODE 0x00000f00
+/* clock and reset control register */
+#define SPIDER_NET_CKRCTRL 0x00000ff0
+
+/** SCONFIG registers */
+#define SPIDER_NET_SCONFIG_IOACTE 0x00002810
+
+/** hardcoded register values */
+#define SPIDER_NET_INT0_MASK_VALUE 0x3f7fe3ff
+#define SPIDER_NET_INT1_MASK_VALUE 0xffffffff
+/* no MAC aborts -> auto retransmission */
+#define SPIDER_NET_INT2_MASK_VALUE 0xfffffff1
+
+/* clear counter when interrupt sources are cleared
+#define SPIDER_NET_FRAMENUM_VALUE 0x0001f001 */
+/* we rely on flagged descriptor interrupts */
+#define SPIDER_NET_FRAMENUM_VALUE 0x00000000
+/* set this first, then the FRAMENUM_VALUE */
+#define SPIDER_NET_GFXFRAMES_VALUE 0x00000000
+
+#define SPIDER_NET_STOP_SEQ_VALUE 0x00000000
+#define SPIDER_NET_RUN_SEQ_VALUE 0x0000007e
+
+#define SPIDER_NET_PHY_CTRL_VALUE 0x00040040
+/* #define SPIDER_NET_PHY_CTRL_VALUE 0x01070080*/
+#define SPIDER_NET_RXMODE_VALUE 0x00000011
+/* auto retransmission in case of MAC aborts */
+#define SPIDER_NET_TXMODE_VALUE 0x00010000
+#define SPIDER_NET_RESTART_VALUE 0x00000000
+#define SPIDER_NET_WOL_VALUE 0x00001111
+#if 0
+#define SPIDER_NET_WOL_VALUE 0x00000000
+#endif
+#define SPIDER_NET_IPSECINIT_VALUE 0x00f000f8
+
+/* pause frames: automatic, no upper retransmission count */
+/* outside loopback mode: ETOMOD signal dont matter, not connected */
+#define SPIDER_NET_OPMODE_VALUE 0x00000063
+/*#define SPIDER_NET_OPMODE_VALUE 0x001b0062*/
+#define SPIDER_NET_LENLMT_VALUE 0x00000908
+
+#define SPIDER_NET_MACAPAUSE_VALUE 0x00000800 /* about 1 ms */
+#define SPIDER_NET_TXPAUSE_VALUE 0x00000000
+
+#define SPIDER_NET_MACMODE_VALUE 0x00000001
+#define SPIDER_NET_BURSTLMT_VALUE 0x00000200 /* about 16 us */
+
+/* 1(0) enable r/tx dma
+ * 0000000 fixed to 0
+ *
+ * 000000 fixed to 0
+ * 0(1) en/disable descr writeback on force end
+ * 0(1) force end
+ *
+ * 000000 fixed to 0
+ * 00 burst alignment: 128 bytes
+ *
+ * 00000 fixed to 0
+ * 0 descr writeback size 32 bytes
+ * 0(1) descr chain end interrupt enable
+ * 0(1) descr status writeback enable */
+
+/* to set RX_DMA_EN */
+#define SPIDER_NET_DMA_RX_VALUE 0x80000000
+#define SPIDER_NET_DMA_RX_FEND_VALUE 0x00030003
+/* to set TX_DMA_EN */
+#define SPIDER_NET_DMA_TX_VALUE 0x80000000
+#define SPIDER_NET_DMA_TX_FEND_VALUE 0x00030003
+
+/* SPIDER_NET_UA_DESCR_VALUE is OR'ed with the unicast address */
+#define SPIDER_NET_UA_DESCR_VALUE 0x00080000
+#define SPIDER_NET_PROMISC_VALUE 0x00080000
+#define SPIDER_NET_NONPROMISC_VALUE 0x00000000
+
+#define SPIDER_NET_DMASEL_VALUE 0x00000001
+
+#define SPIDER_NET_ECMODE_VALUE 0x00000000
+
+#define SPIDER_NET_CKRCTRL_RUN_VALUE 0x1fff010f
+#define SPIDER_NET_CKRCTRL_STOP_VALUE 0x0000010f
+
+#define SPIDER_NET_SBIMSTATE_VALUE 0x00000000
+#define SPIDER_NET_SBTMSTATE_VALUE 0x00000000
+
+/* SPIDER_NET_GHIINT0STS bits, in reverse order so that they can be used
+ * with 1 << SPIDER_NET_... */
+enum spider_net_int0_status {
+ SPIDER_NET_GPHYINT = 0,
+ SPIDER_NET_GMAC2INT,
+ SPIDER_NET_GMAC1INT,
+ SPIDER_NET_GIPSINT,
+ SPIDER_NET_GFIFOINT,
+ SPIDER_NET_GDMACINT,
+ SPIDER_NET_GSYSINT,
+ SPIDER_NET_GPWOPCMPINT,
+ SPIDER_NET_GPROPCMPINT,
+ SPIDER_NET_GPWFFINT,
+ SPIDER_NET_GRMDADRINT,
+ SPIDER_NET_GRMARPINT,
+ SPIDER_NET_GRMMPINT,
+ SPIDER_NET_GDTDEN0INT,
+ SPIDER_NET_GDDDEN0INT,
+ SPIDER_NET_GDCDEN0INT,
+ SPIDER_NET_GDBDEN0INT,
+ SPIDER_NET_GDADEN0INT,
+ SPIDER_NET_GDTFDCINT,
+ SPIDER_NET_GDDFDCINT,
+ SPIDER_NET_GDCFDCINT,
+ SPIDER_NET_GDBFDCINT,
+ SPIDER_NET_GDAFDCINT,
+ SPIDER_NET_GTTEDINT,
+ SPIDER_NET_GDTDCEINT,
+ SPIDER_NET_GRFDNMINT,
+ SPIDER_NET_GRFCNMINT,
+ SPIDER_NET_GRFBNMINT,
+ SPIDER_NET_GRFANMINT,
+ SPIDER_NET_GRFNMINT,
+ SPIDER_NET_G1TMCNTINT,
+ SPIDER_NET_GFREECNTINT
+};
+/* GHIINT1STS bits */
+enum spider_net_int1_status {
+ SPIDER_NET_GTMFLLINT = 0,
+ SPIDER_NET_GRMFLLINT,
+ SPIDER_NET_GTMSHTINT,
+ SPIDER_NET_GDTINVDINT,
+ SPIDER_NET_GRFDFLLINT,
+ SPIDER_NET_GDDDCEINT,
+ SPIDER_NET_GDDINVDINT,
+ SPIDER_NET_GRFCFLLINT,
+ SPIDER_NET_GDCDCEINT,
+ SPIDER_NET_GDCINVDINT,
+ SPIDER_NET_GRFBFLLINT,
+ SPIDER_NET_GDBDCEINT,
+ SPIDER_NET_GDBINVDINT,
+ SPIDER_NET_GRFAFLLINT,
+ SPIDER_NET_GDADCEINT,
+ SPIDER_NET_GDAINVDINT,
+ SPIDER_NET_GDTRSERINT,
+ SPIDER_NET_GDDRSERINT,
+ SPIDER_NET_GDCRSERINT,
+ SPIDER_NET_GDBRSERINT,
+ SPIDER_NET_GDARSERINT,
+ SPIDER_NET_GDSERINT,
+ SPIDER_NET_GDTPTERINT,
+ SPIDER_NET_GDDPTERINT,
+ SPIDER_NET_GDCPTERINT,
+ SPIDER_NET_GDBPTERINT,
+ SPIDER_NET_GDAPTERINT
+};
+/* GHIINT2STS bits */
+enum spider_net_int2_status {
+ SPIDER_NET_GPROPERINT = 0,
+ SPIDER_NET_GMCTCRSNGINT,
+ SPIDER_NET_GMCTLCOLINT,
+ SPIDER_NET_GMCTTMOTINT,
+ SPIDER_NET_GMCRCAERINT,
+ SPIDER_NET_GMCRCALERINT,
+ SPIDER_NET_GMCRALNERINT,
+ SPIDER_NET_GMCROVRINT,
+ SPIDER_NET_GMCRRNTINT,
+ SPIDER_NET_GMCRRXERINT,
+ SPIDER_NET_GTITCSERINT,
+ SPIDER_NET_GTIFMTERINT,
+ SPIDER_NET_GTIPKTRVKINT,
+ SPIDER_NET_GTISPINGINT,
+ SPIDER_NET_GTISADNGINT,
+ SPIDER_NET_GTISPDNGINT,
+ SPIDER_NET_GRIFMTERINT,
+ SPIDER_NET_GRIPKTRVKINT,
+ SPIDER_NET_GRISPINGINT,
+ SPIDER_NET_GRISADNGINT,
+ SPIDER_NET_GRISPDNGINT
+};
+
+#define SPIDER_NET_TXINT ( (1 << SPIDER_NET_GTTEDINT) | \
+ (1 << SPIDER_NET_GDTDCEINT) | \
+ (1 << SPIDER_NET_GDTFDCINT) )
+
+/* we rely on flagged descriptor interrupts*/
+#define SPIDER_NET_RXINT ( (1 << SPIDER_NET_GDAFDCINT) | \
+ (1 << SPIDER_NET_GRMFLLINT) )
+
+#define SPIDER_NET_GPREXEC 0x80000000
+#define SPIDER_NET_GPRDAT_MASK 0x0000ffff
+
+/* descriptor bits
+ *
+ * 1010 descriptor ready
+ * 0 descr in middle of chain
+ * 000 fixed to 0
+ *
+ * 0 no interrupt on completion
+ * 000 fixed to 0
+ * 1 no ipsec processing
+ * 1 last descriptor for this frame
+ * 00 no checksum
+ * 10 tcp checksum
+ * 11 udp checksum
+ *
+ * 00 fixed to 0
+ * 0 fixed to 0
+ * 0 no interrupt on response errors
+ * 0 no interrupt on invalid descr
+ * 0 no interrupt on dma process termination
+ * 0 no interrupt on descr chain end
+ * 0 no interrupt on descr complete
+ *
+ * 000 fixed to 0
+ * 0 response error interrupt status
+ * 0 invalid descr status
+ * 0 dma termination status
+ * 0 descr chain end status
+ * 0 descr complete status */
+#define SPIDER_NET_DMAC_CMDSTAT_NOCS 0xa00c0000
+#define SPIDER_NET_DMAC_CMDSTAT_TCPCS 0xa00e0000
+#define SPIDER_NET_DMAC_CMDSTAT_UDPCS 0xa00f0000
+#define SPIDER_NET_DESCR_IND_PROC_SHIFT 28
+#define SPIDER_NET_DESCR_IND_PROC_MASKO 0x0fffffff
+
+/* descr ready, descr is in middle of chain, get interrupt on completion */
+#define SPIDER_NET_DMAC_RX_CARDOWNED 0xa0800000
+
+/* multicast is no problem */
+#define SPIDER_NET_DATA_ERROR_MASK 0xffffbfff
+
+enum spider_net_descr_status {
+ SPIDER_NET_DESCR_COMPLETE = 0x00, /* used in rx and tx */
+ SPIDER_NET_DESCR_RESPONSE_ERROR = 0x01, /* used in rx and tx */
+ SPIDER_NET_DESCR_PROTECTION_ERROR = 0x02, /* used in rx and tx */
+ SPIDER_NET_DESCR_FRAME_END = 0x04, /* used in rx */
+ SPIDER_NET_DESCR_FORCE_END = 0x05, /* used in rx and tx */
+ SPIDER_NET_DESCR_CARDOWNED = 0x0a, /* used in rx and tx */
+ SPIDER_NET_DESCR_NOT_IN_USE /* any other value */
+};
+
+struct spider_net_descr {
+ /* as defined by the hardware */
+ dma_addr_t buf_addr;
+ u32 buf_size;
+ dma_addr_t 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 spider_net_descr *next;
+ struct spider_net_descr *prev;
+} __attribute__((aligned(32)));
+
+struct spider_net_descr_chain {
+ /* we walk from tail to head */
+ struct spider_net_descr *head;
+ struct spider_net_descr *tail;
+};
+
+/* descriptor data_status bits */
+#define SPIDER_NET_RXIPCHK 29
+#define SPIDER_NET_TCPUDPIPCHK 28
+#define SPIDER_NET_DATA_STATUS_CHK_MASK (1 << SPIDER_NET_RXIPCHK | \
+ 1 << SPIDER_NET_TCPUDPIPCHK)
+
+#define SPIDER_NET_VLAN_PACKET 21
+
+/* descriptor data_error bits */
+#define SPIDER_NET_RXIPCHKERR 27
+#define SPIDER_NET_RXTCPCHKERR 26
+#define SPIDER_NET_DATA_ERROR_CHK_MASK (1 << SPIDER_NET_RXIPCHKERR | \
+ 1 << SPIDER_NET_RXTCPCHKERR)
+
+/* the cases we don't pass the packet to the stack */
+#define SPIDER_NET_DESTROY_RX_FLAGS 0x70138000
+
+#define SPIDER_NET_DESCR_SIZE 32
+
+/* this will be bigger some time */
+struct spider_net_options {
+ int rx_csum; /* for rx: if 0 ip_summed=NONE,
+ if 1 and hw has verified, ip_summed=UNNECESSARY */
+};
+
+#define SPIDER_NET_DEFAULT_MSG ( NETIF_MSG_DRV | \
+ NETIF_MSG_PROBE | \
+ NETIF_MSG_LINK | \
+ NETIF_MSG_TIMER | \
+ NETIF_MSG_IFDOWN | \
+ NETIF_MSG_IFUP | \
+ NETIF_MSG_RX_ERR | \
+ NETIF_MSG_TX_ERR | \
+ NETIF_MSG_TX_QUEUED | \
+ NETIF_MSG_INTR | \
+ NETIF_MSG_TX_DONE | \
+ NETIF_MSG_RX_STATUS | \
+ NETIF_MSG_PKTDATA | \
+ NETIF_MSG_HW | \
+ NETIF_MSG_WOL )
+
+struct spider_net_card {
+ struct net_device *netdev;
+ struct pci_dev *pdev;
+ struct mii_phy phy;
+
+ void __iomem *regs;
+
+ struct spider_net_descr_chain tx_chain;
+ struct spider_net_descr_chain rx_chain;
+ spinlock_t chain_lock;
+
+ struct net_device_stats netdev_stats;
+
+ struct spider_net_options options;
+
+ spinlock_t intmask_lock;
+
+ struct work_struct tx_timeout_task;
+ atomic_t tx_timeout_task_counter;
+ wait_queue_head_t waitq;
+
+ /* for ethtool */
+ int msg_enable;
+
+ struct spider_net_descr descr[0];
+};
+
+#define pr_err(fmt,arg...) \
+ printk(KERN_ERR fmt ,##arg)
+
+#endif
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff