// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Network device driver for Cell Processor-Based Blade and Celleb platform
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*
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* (C) Copyright IBM Corp. 2005
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* (C) Copyright 2006 TOSHIBA CORPORATION
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*
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* Authors : Utz Bacher <utz.bacher@de.ibm.com>
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* Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
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*/
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#include <linux/compiler.h>
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#include <linux/crc32.h>
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#include <linux/delay.h>
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#include <linux/etherdevice.h>
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#include <linux/ethtool.h>
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#include <linux/firmware.h>
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#include <linux/if_vlan.h>
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#include <linux/in.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/gfp.h>
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#include <linux/ioport.h>
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#include <linux/ip.h>
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#include <linux/kernel.h>
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#include <linux/mii.h>
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/device.h>
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#include <linux/pci.h>
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#include <linux/skbuff.h>
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#include <linux/tcp.h>
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#include <linux/types.h>
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#include <linux/vmalloc.h>
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#include <linux/wait.h>
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#include <linux/workqueue.h>
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#include <linux/bitops.h>
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#include <net/checksum.h>
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#include "spider_net.h"
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MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \
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"<Jens.Osterkamp@de.ibm.com>");
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MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(VERSION);
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MODULE_FIRMWARE(SPIDER_NET_FIRMWARE_NAME);
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static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT;
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static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT;
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module_param(rx_descriptors, int, 0444);
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module_param(tx_descriptors, int, 0444);
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MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \
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"in rx chains");
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MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \
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"in tx chain");
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char spider_net_driver_name[] = "spidernet";
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static const struct pci_device_id spider_net_pci_tbl[] = {
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{ PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET,
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PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
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{ 0, }
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};
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MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl);
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/**
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* spider_net_read_reg - reads an SMMIO register of a card
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* @card: device structure
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* @reg: register to read from
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*
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* returns the content of the specified SMMIO register.
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*/
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static inline u32
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spider_net_read_reg(struct spider_net_card *card, u32 reg)
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{
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/* We use the powerpc specific variants instead of readl_be() because
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* we know spidernet is not a real PCI device and we can thus avoid the
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* performance hit caused by the PCI workarounds.
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*/
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return in_be32(card->regs + reg);
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}
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/**
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* spider_net_write_reg - writes to an SMMIO register of a card
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* @card: device structure
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* @reg: register to write to
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* @value: value to write into the specified SMMIO register
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*/
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static inline void
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spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
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{
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/* We use the powerpc specific variants instead of writel_be() because
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* we know spidernet is not a real PCI device and we can thus avoid the
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* performance hit caused by the PCI workarounds.
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*/
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out_be32(card->regs + reg, value);
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}
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/**
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* spider_net_write_phy - write to phy register
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* @netdev: adapter to be written to
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* @mii_id: id of MII
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* @reg: PHY register
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* @val: value to be written to phy register
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*
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* spider_net_write_phy_register writes to an arbitrary PHY
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* register via the spider GPCWOPCMD register. We assume the queue does
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* not run full (not more than 15 commands outstanding).
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**/
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static void
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spider_net_write_phy(struct net_device *netdev, int mii_id,
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int reg, int val)
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{
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struct spider_net_card *card = netdev_priv(netdev);
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u32 writevalue;
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writevalue = ((u32)mii_id << 21) |
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((u32)reg << 16) | ((u32)val);
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spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue);
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}
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/**
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* spider_net_read_phy - read from phy register
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* @netdev: network device to be read from
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* @mii_id: id of MII
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* @reg: PHY register
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*
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* Returns value read from PHY register
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*
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* spider_net_write_phy reads from an arbitrary PHY
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* register via the spider GPCROPCMD register
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**/
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static int
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spider_net_read_phy(struct net_device *netdev, int mii_id, int reg)
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{
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struct spider_net_card *card = netdev_priv(netdev);
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u32 readvalue;
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readvalue = ((u32)mii_id << 21) | ((u32)reg << 16);
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spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue);
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/* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT
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* interrupt, as we poll for the completion of the read operation
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* in spider_net_read_phy. Should take about 50 us */
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do {
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readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD);
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} while (readvalue & SPIDER_NET_GPREXEC);
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readvalue &= SPIDER_NET_GPRDAT_MASK;
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return readvalue;
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}
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/**
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* spider_net_setup_aneg - initial auto-negotiation setup
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* @card: device structure
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**/
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static void
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spider_net_setup_aneg(struct spider_net_card *card)
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{
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struct mii_phy *phy = &card->phy;
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u32 advertise = 0;
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u16 bmsr, estat;
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bmsr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
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estat = spider_net_read_phy(card->netdev, phy->mii_id, MII_ESTATUS);
|
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if (bmsr & BMSR_10HALF)
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advertise |= ADVERTISED_10baseT_Half;
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if (bmsr & BMSR_10FULL)
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advertise |= ADVERTISED_10baseT_Full;
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if (bmsr & BMSR_100HALF)
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advertise |= ADVERTISED_100baseT_Half;
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if (bmsr & BMSR_100FULL)
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advertise |= ADVERTISED_100baseT_Full;
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if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_TFULL))
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advertise |= SUPPORTED_1000baseT_Full;
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if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_THALF))
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advertise |= SUPPORTED_1000baseT_Half;
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sungem_phy_probe(phy, phy->mii_id);
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phy->def->ops->setup_aneg(phy, advertise);
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}
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/**
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* spider_net_rx_irq_off - switch off rx irq on this spider card
|
* @card: device structure
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*
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* switches off rx irq by masking them out in the GHIINTnMSK register
|
*/
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static void
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spider_net_rx_irq_off(struct spider_net_card *card)
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{
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u32 regvalue;
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regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT);
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spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
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}
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/**
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* spider_net_rx_irq_on - switch on rx irq on this spider card
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* @card: device structure
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*
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* switches on rx irq by enabling them in the GHIINTnMSK register
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*/
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static void
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spider_net_rx_irq_on(struct spider_net_card *card)
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{
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u32 regvalue;
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regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT;
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spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
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}
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/**
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* spider_net_set_promisc - sets the unicast address or the promiscuous mode
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* @card: card structure
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*
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* spider_net_set_promisc sets the unicast destination address filter and
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* thus either allows for non-promisc mode or promisc mode
|
*/
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static void
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spider_net_set_promisc(struct spider_net_card *card)
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{
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u32 macu, macl;
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struct net_device *netdev = card->netdev;
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if (netdev->flags & IFF_PROMISC) {
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/* clear destination entry 0 */
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spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, 0);
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spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, 0);
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spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
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SPIDER_NET_PROMISC_VALUE);
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} else {
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macu = netdev->dev_addr[0];
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macu <<= 8;
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macu |= netdev->dev_addr[1];
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memcpy(&macl, &netdev->dev_addr[2], sizeof(macl));
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macu |= SPIDER_NET_UA_DESCR_VALUE;
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spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR, macu);
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spider_net_write_reg(card, SPIDER_NET_GMRUAFILnR + 0x04, macl);
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spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R,
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SPIDER_NET_NONPROMISC_VALUE);
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}
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}
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/**
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* spider_net_get_descr_status -- returns the status of a descriptor
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* @descr: descriptor to look at
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*
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* returns the status as in the dmac_cmd_status field of the descriptor
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*/
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static inline int
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spider_net_get_descr_status(struct spider_net_hw_descr *hwdescr)
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{
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return hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK;
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}
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/**
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* spider_net_free_chain - free descriptor chain
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* @card: card structure
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* @chain: address of chain
|
*
|
*/
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static void
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spider_net_free_chain(struct spider_net_card *card,
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struct spider_net_descr_chain *chain)
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{
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struct spider_net_descr *descr;
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descr = chain->ring;
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do {
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descr->bus_addr = 0;
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descr->hwdescr->next_descr_addr = 0;
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descr = descr->next;
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} while (descr != chain->ring);
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dma_free_coherent(&card->pdev->dev, chain->num_desc * sizeof(struct spider_net_hw_descr),
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chain->hwring, chain->dma_addr);
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}
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/**
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* spider_net_init_chain - alloc and link descriptor chain
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* @card: card structure
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* @chain: address of chain
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*
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* We manage a circular list that mirrors the hardware structure,
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* except that the hardware uses bus addresses.
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*
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* Returns 0 on success, <0 on failure
|
*/
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static int
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spider_net_init_chain(struct spider_net_card *card,
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struct spider_net_descr_chain *chain)
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{
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int i;
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struct spider_net_descr *descr;
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struct spider_net_hw_descr *hwdescr;
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dma_addr_t buf;
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size_t alloc_size;
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alloc_size = chain->num_desc * sizeof(struct spider_net_hw_descr);
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chain->hwring = dma_alloc_coherent(&card->pdev->dev, alloc_size,
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&chain->dma_addr, GFP_KERNEL);
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if (!chain->hwring)
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return -ENOMEM;
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/* Set up the hardware pointers in each descriptor */
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descr = chain->ring;
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hwdescr = chain->hwring;
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buf = chain->dma_addr;
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for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) {
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hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
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hwdescr->next_descr_addr = 0;
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descr->hwdescr = hwdescr;
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descr->bus_addr = buf;
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descr->next = descr + 1;
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descr->prev = descr - 1;
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buf += sizeof(struct spider_net_hw_descr);
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}
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/* do actual circular list */
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(descr-1)->next = chain->ring;
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chain->ring->prev = descr-1;
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spin_lock_init(&chain->lock);
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chain->head = chain->ring;
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chain->tail = chain->ring;
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return 0;
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}
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/**
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* spider_net_free_rx_chain_contents - frees descr contents in rx chain
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* @card: card structure
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*
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* returns 0 on success, <0 on failure
|
*/
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static void
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spider_net_free_rx_chain_contents(struct spider_net_card *card)
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{
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struct spider_net_descr *descr;
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descr = card->rx_chain.head;
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do {
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if (descr->skb) {
|
pci_unmap_single(card->pdev, descr->hwdescr->buf_addr,
|
SPIDER_NET_MAX_FRAME,
|
PCI_DMA_BIDIRECTIONAL);
|
dev_kfree_skb(descr->skb);
|
descr->skb = NULL;
|
}
|
descr = descr->next;
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} while (descr != card->rx_chain.head);
|
}
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/**
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* spider_net_prepare_rx_descr - Reinitialize RX descriptor
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* @card: card structure
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* @descr: descriptor to re-init
|
*
|
* Return 0 on success, <0 on failure.
|
*
|
* Allocates a new rx skb, iommu-maps it and attaches it to the
|
* descriptor. Mark the descriptor as activated, ready-to-use.
|
*/
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static int
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spider_net_prepare_rx_descr(struct spider_net_card *card,
|
struct spider_net_descr *descr)
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{
|
struct spider_net_hw_descr *hwdescr = descr->hwdescr;
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dma_addr_t buf;
|
int offset;
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int bufsize;
|
|
/* we need to round up the buffer size to a multiple of 128 */
|
bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) &
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(~(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 = netdev_alloc_skb(card->netdev,
|
bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
|
if (!descr->skb) {
|
if (netif_msg_rx_err(card) && net_ratelimit())
|
dev_err(&card->netdev->dev,
|
"Not enough memory to allocate rx buffer\n");
|
card->spider_stats.alloc_rx_skb_error++;
|
return -ENOMEM;
|
}
|
hwdescr->buf_size = bufsize;
|
hwdescr->result_size = 0;
|
hwdescr->valid_size = 0;
|
hwdescr->data_status = 0;
|
hwdescr->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);
|
/* iommu-map the skb */
|
buf = pci_map_single(card->pdev, descr->skb->data,
|
SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
|
if (pci_dma_mapping_error(card->pdev, buf)) {
|
dev_kfree_skb_any(descr->skb);
|
descr->skb = NULL;
|
if (netif_msg_rx_err(card) && net_ratelimit())
|
dev_err(&card->netdev->dev, "Could not iommu-map rx buffer\n");
|
card->spider_stats.rx_iommu_map_error++;
|
hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
|
} else {
|
hwdescr->buf_addr = buf;
|
wmb();
|
hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |
|
SPIDER_NET_DMAC_NOINTR_COMPLETE;
|
}
|
|
return 0;
|
}
|
|
/**
|
* spider_net_enable_rxchtails - sets RX dmac chain tail addresses
|
* @card: card structure
|
*
|
* spider_net_enable_rxchtails sets the RX DMAC chain tail addresses in the
|
* chip by writing to the appropriate register. DMA is enabled in
|
* spider_net_enable_rxdmac.
|
*/
|
static inline void
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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 inline void
|
spider_net_enable_rxdmac(struct spider_net_card *card)
|
{
|
wmb();
|
spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
|
SPIDER_NET_DMA_RX_VALUE);
|
}
|
|
/**
|
* 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 the DMA controller, with the force-end flag set.
|
*/
|
static inline 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_refill_rx_chain - refills descriptors/skbs in the rx chains
|
* @card: card structure
|
*
|
* refills descriptors in the rx chain: allocates skbs and iommu-maps them.
|
*/
|
static void
|
spider_net_refill_rx_chain(struct spider_net_card *card)
|
{
|
struct spider_net_descr_chain *chain = &card->rx_chain;
|
unsigned long flags;
|
|
/* one context doing the refill (and a second context seeing that
|
* and omitting it) is ok. If called by NAPI, we'll be called again
|
* as spider_net_decode_one_descr is called several times. If some
|
* interrupt calls us, the NAPI is about to clean up anyway. */
|
if (!spin_trylock_irqsave(&chain->lock, flags))
|
return;
|
|
while (spider_net_get_descr_status(chain->head->hwdescr) ==
|
SPIDER_NET_DESCR_NOT_IN_USE) {
|
if (spider_net_prepare_rx_descr(card, chain->head))
|
break;
|
chain->head = chain->head->next;
|
}
|
|
spin_unlock_irqrestore(&chain->lock, flags);
|
}
|
|
/**
|
* 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)
|
{
|
struct spider_net_descr_chain *chain = &card->rx_chain;
|
struct spider_net_descr *start = chain->tail;
|
struct spider_net_descr *descr = start;
|
|
/* Link up the hardware chain pointers */
|
do {
|
descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
|
descr = descr->next;
|
} while (descr != start);
|
|
/* 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);
|
spider_net_enable_rxdmac(card);
|
return 0;
|
|
error:
|
spider_net_free_rx_chain_contents(card);
|
return -ENOMEM;
|
}
|
|
/**
|
* 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)
|
{
|
u32 crc;
|
u8 hash;
|
char addr_for_crc[ETH_ALEN] = { 0, };
|
int i, bit;
|
|
for (i = 0; i < ETH_ALEN * 8; i++) {
|
bit = (addr[i / 8] >> (i % 8)) & 1;
|
addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8));
|
}
|
|
crc = crc32_be(~0, addr_for_crc, netdev->addr_len);
|
|
hash = (crc >> 27);
|
hash <<= 3;
|
hash |= crc & 7;
|
hash &= 0xff;
|
|
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 netdev_hw_addr *ha;
|
u8 hash;
|
int i;
|
u32 reg;
|
struct spider_net_card *card = netdev_priv(netdev);
|
DECLARE_BITMAP(bitmask, SPIDER_NET_MULTICAST_HASHES) = {};
|
|
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);
|
|
netdev_for_each_mc_addr(ha, netdev) {
|
hash = spider_net_get_multicast_hash(netdev, ha->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_prepare_tx_descr - fill tx descriptor with skb data
|
* @card: card structure
|
* @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 sk_buff *skb)
|
{
|
struct spider_net_descr_chain *chain = &card->tx_chain;
|
struct spider_net_descr *descr;
|
struct spider_net_hw_descr *hwdescr;
|
dma_addr_t buf;
|
unsigned long flags;
|
|
buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
|
if (pci_dma_mapping_error(card->pdev, buf)) {
|
if (netif_msg_tx_err(card) && net_ratelimit())
|
dev_err(&card->netdev->dev, "could not iommu-map packet (%p, %i). "
|
"Dropping packet\n", skb->data, skb->len);
|
card->spider_stats.tx_iommu_map_error++;
|
return -ENOMEM;
|
}
|
|
spin_lock_irqsave(&chain->lock, flags);
|
descr = card->tx_chain.head;
|
if (descr->next == chain->tail->prev) {
|
spin_unlock_irqrestore(&chain->lock, flags);
|
pci_unmap_single(card->pdev, buf, skb->len, PCI_DMA_TODEVICE);
|
return -ENOMEM;
|
}
|
hwdescr = descr->hwdescr;
|
chain->head = descr->next;
|
|
descr->skb = skb;
|
hwdescr->buf_addr = buf;
|
hwdescr->buf_size = skb->len;
|
hwdescr->next_descr_addr = 0;
|
hwdescr->data_status = 0;
|
|
hwdescr->dmac_cmd_status =
|
SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_TXFRMTL;
|
spin_unlock_irqrestore(&chain->lock, flags);
|
|
if (skb->ip_summed == CHECKSUM_PARTIAL)
|
switch (ip_hdr(skb)->protocol) {
|
case IPPROTO_TCP:
|
hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP;
|
break;
|
case IPPROTO_UDP:
|
hwdescr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP;
|
break;
|
}
|
|
/* Chain the bus address, so that the DMA engine finds this descr. */
|
wmb();
|
descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
|
|
netif_trans_update(card->netdev); /* set netdev watchdog timer */
|
return 0;
|
}
|
|
static int
|
spider_net_set_low_watermark(struct spider_net_card *card)
|
{
|
struct spider_net_descr *descr = card->tx_chain.tail;
|
struct spider_net_hw_descr *hwdescr;
|
unsigned long flags;
|
int status;
|
int cnt=0;
|
int i;
|
|
/* Measure the length of the queue. Measurement does not
|
* need to be precise -- does not need a lock. */
|
while (descr != card->tx_chain.head) {
|
status = descr->hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE;
|
if (status == SPIDER_NET_DESCR_NOT_IN_USE)
|
break;
|
descr = descr->next;
|
cnt++;
|
}
|
|
/* If TX queue is short, don't even bother with interrupts */
|
if (cnt < card->tx_chain.num_desc/4)
|
return cnt;
|
|
/* Set low-watermark 3/4th's of the way into the queue. */
|
descr = card->tx_chain.tail;
|
cnt = (cnt*3)/4;
|
for (i=0;i<cnt; i++)
|
descr = descr->next;
|
|
/* Set the new watermark, clear the old watermark */
|
spin_lock_irqsave(&card->tx_chain.lock, flags);
|
descr->hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG;
|
if (card->low_watermark && card->low_watermark != descr) {
|
hwdescr = card->low_watermark->hwdescr;
|
hwdescr->dmac_cmd_status =
|
hwdescr->dmac_cmd_status & ~SPIDER_NET_DESCR_TXDESFLG;
|
}
|
card->low_watermark = descr;
|
spin_unlock_irqrestore(&card->tx_chain.lock, flags);
|
return cnt;
|
}
|
|
/**
|
* 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
|
*
|
* returns 0 if the tx ring is empty, otherwise 1.
|
*
|
* spider_net_release_tx_chain releases the tx descriptors that spider has
|
* finished with (if non-brutal) or simply release tx descriptors (if brutal).
|
* If some other context is calling this function, we return 1 so that we're
|
* scheduled again (if we were scheduled) and will not lose initiative.
|
*/
|
static int
|
spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
|
{
|
struct net_device *dev = card->netdev;
|
struct spider_net_descr_chain *chain = &card->tx_chain;
|
struct spider_net_descr *descr;
|
struct spider_net_hw_descr *hwdescr;
|
struct sk_buff *skb;
|
u32 buf_addr;
|
unsigned long flags;
|
int status;
|
|
while (1) {
|
spin_lock_irqsave(&chain->lock, flags);
|
if (chain->tail == chain->head) {
|
spin_unlock_irqrestore(&chain->lock, flags);
|
return 0;
|
}
|
descr = chain->tail;
|
hwdescr = descr->hwdescr;
|
|
status = spider_net_get_descr_status(hwdescr);
|
switch (status) {
|
case SPIDER_NET_DESCR_COMPLETE:
|
dev->stats.tx_packets++;
|
dev->stats.tx_bytes += descr->skb->len;
|
break;
|
|
case SPIDER_NET_DESCR_CARDOWNED:
|
if (!brutal) {
|
spin_unlock_irqrestore(&chain->lock, flags);
|
return 1;
|
}
|
|
/* fallthrough, if we release the descriptors
|
* brutally (then we don't care about
|
* SPIDER_NET_DESCR_CARDOWNED) */
|
fallthrough;
|
|
case SPIDER_NET_DESCR_RESPONSE_ERROR:
|
case SPIDER_NET_DESCR_PROTECTION_ERROR:
|
case SPIDER_NET_DESCR_FORCE_END:
|
if (netif_msg_tx_err(card))
|
dev_err(&card->netdev->dev, "forcing end of tx descriptor "
|
"with status x%02x\n", status);
|
dev->stats.tx_errors++;
|
break;
|
|
default:
|
dev->stats.tx_dropped++;
|
if (!brutal) {
|
spin_unlock_irqrestore(&chain->lock, flags);
|
return 1;
|
}
|
}
|
|
chain->tail = descr->next;
|
hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE;
|
skb = descr->skb;
|
descr->skb = NULL;
|
buf_addr = hwdescr->buf_addr;
|
spin_unlock_irqrestore(&chain->lock, flags);
|
|
/* unmap the skb */
|
if (skb) {
|
pci_unmap_single(card->pdev, buf_addr, skb->len,
|
PCI_DMA_TODEVICE);
|
dev_consume_skb_any(skb);
|
}
|
}
|
return 0;
|
}
|
|
/**
|
* spider_net_kick_tx_dma - enables TX DMA processing
|
* @card: card structure
|
*
|
* This routine will start the transmit DMA running if
|
* it is not already running. This routine ned only be
|
* called when queueing a new packet to an empty tx queue.
|
* Writes the current tx chain head as start address
|
* of the tx descriptor chain and enables the transmission
|
* DMA engine.
|
*/
|
static inline void
|
spider_net_kick_tx_dma(struct spider_net_card *card)
|
{
|
struct spider_net_descr *descr;
|
|
if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) &
|
SPIDER_NET_TX_DMA_EN)
|
goto out;
|
|
descr = card->tx_chain.tail;
|
for (;;) {
|
if (spider_net_get_descr_status(descr->hwdescr) ==
|
SPIDER_NET_DESCR_CARDOWNED) {
|
spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
|
descr->bus_addr);
|
spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
|
SPIDER_NET_DMA_TX_VALUE);
|
break;
|
}
|
if (descr == card->tx_chain.head)
|
break;
|
descr = descr->next;
|
}
|
|
out:
|
mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
|
}
|
|
/**
|
* spider_net_xmit - transmits a frame over the device
|
* @skb: packet to send out
|
* @netdev: interface device structure
|
*
|
* returns NETDEV_TX_OK on success, NETDEV_TX_BUSY on failure
|
*/
|
static netdev_tx_t
|
spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
|
{
|
int cnt;
|
struct spider_net_card *card = netdev_priv(netdev);
|
|
spider_net_release_tx_chain(card, 0);
|
|
if (spider_net_prepare_tx_descr(card, skb) != 0) {
|
netdev->stats.tx_dropped++;
|
netif_stop_queue(netdev);
|
return NETDEV_TX_BUSY;
|
}
|
|
cnt = spider_net_set_low_watermark(card);
|
if (cnt < 5)
|
spider_net_kick_tx_dma(card);
|
return NETDEV_TX_OK;
|
}
|
|
/**
|
* spider_net_cleanup_tx_ring - cleans up the TX ring
|
* @card: card structure
|
*
|
* spider_net_cleanup_tx_ring is called by either the tx_timer
|
* or from the NAPI polling routine.
|
* This routine releases resources associted with transmitted
|
* packets, including updating the queue tail pointer.
|
*/
|
static void
|
spider_net_cleanup_tx_ring(struct timer_list *t)
|
{
|
struct spider_net_card *card = from_timer(card, t, tx_timer);
|
if ((spider_net_release_tx_chain(card, 0) != 0) &&
|
(card->netdev->flags & IFF_UP)) {
|
spider_net_kick_tx_dma(card);
|
netif_wake_queue(card->netdev);
|
}
|
}
|
|
/**
|
* 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
|
*
|
* Fills out skb structure and passes the data to the stack.
|
* The descriptor state is not changed.
|
*/
|
static void
|
spider_net_pass_skb_up(struct spider_net_descr *descr,
|
struct spider_net_card *card)
|
{
|
struct spider_net_hw_descr *hwdescr = descr->hwdescr;
|
struct sk_buff *skb = descr->skb;
|
struct net_device *netdev = card->netdev;
|
u32 data_status = hwdescr->data_status;
|
u32 data_error = hwdescr->data_error;
|
|
skb_put(skb, hwdescr->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 */
|
skb_checksum_none_assert(skb);
|
if (netdev->features & NETIF_F_RXCSUM) {
|
if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) ==
|
SPIDER_NET_DATA_STATUS_CKSUM_MASK) &&
|
!(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK))
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
}
|
|
if (data_status & SPIDER_NET_VLAN_PACKET) {
|
/* further enhancements: HW-accel VLAN */
|
}
|
|
/* update netdevice statistics */
|
netdev->stats.rx_packets++;
|
netdev->stats.rx_bytes += skb->len;
|
|
/* pass skb up to stack */
|
netif_receive_skb(skb);
|
}
|
|
static void show_rx_chain(struct spider_net_card *card)
|
{
|
struct spider_net_descr_chain *chain = &card->rx_chain;
|
struct spider_net_descr *start= chain->tail;
|
struct spider_net_descr *descr= start;
|
struct spider_net_hw_descr *hwd = start->hwdescr;
|
struct device *dev = &card->netdev->dev;
|
u32 curr_desc, next_desc;
|
int status;
|
|
int tot = 0;
|
int cnt = 0;
|
int off = start - chain->ring;
|
int cstat = hwd->dmac_cmd_status;
|
|
dev_info(dev, "Total number of descrs=%d\n",
|
chain->num_desc);
|
dev_info(dev, "Chain tail located at descr=%d, status=0x%x\n",
|
off, cstat);
|
|
curr_desc = spider_net_read_reg(card, SPIDER_NET_GDACTDPA);
|
next_desc = spider_net_read_reg(card, SPIDER_NET_GDACNEXTDA);
|
|
status = cstat;
|
do
|
{
|
hwd = descr->hwdescr;
|
off = descr - chain->ring;
|
status = hwd->dmac_cmd_status;
|
|
if (descr == chain->head)
|
dev_info(dev, "Chain head is at %d, head status=0x%x\n",
|
off, status);
|
|
if (curr_desc == descr->bus_addr)
|
dev_info(dev, "HW curr desc (GDACTDPA) is at %d, status=0x%x\n",
|
off, status);
|
|
if (next_desc == descr->bus_addr)
|
dev_info(dev, "HW next desc (GDACNEXTDA) is at %d, status=0x%x\n",
|
off, status);
|
|
if (hwd->next_descr_addr == 0)
|
dev_info(dev, "chain is cut at %d\n", off);
|
|
if (cstat != status) {
|
int from = (chain->num_desc + off - cnt) % chain->num_desc;
|
int to = (chain->num_desc + off - 1) % chain->num_desc;
|
dev_info(dev, "Have %d (from %d to %d) descrs "
|
"with stat=0x%08x\n", cnt, from, to, cstat);
|
cstat = status;
|
cnt = 0;
|
}
|
|
cnt ++;
|
tot ++;
|
descr = descr->next;
|
} while (descr != start);
|
|
dev_info(dev, "Last %d descrs with stat=0x%08x "
|
"for a total of %d descrs\n", cnt, cstat, tot);
|
|
#ifdef DEBUG
|
/* Now dump the whole ring */
|
descr = start;
|
do
|
{
|
struct spider_net_hw_descr *hwd = descr->hwdescr;
|
status = spider_net_get_descr_status(hwd);
|
cnt = descr - chain->ring;
|
dev_info(dev, "Descr %d stat=0x%08x skb=%p\n",
|
cnt, status, descr->skb);
|
dev_info(dev, "bus addr=%08x buf addr=%08x sz=%d\n",
|
descr->bus_addr, hwd->buf_addr, hwd->buf_size);
|
dev_info(dev, "next=%08x result sz=%d valid sz=%d\n",
|
hwd->next_descr_addr, hwd->result_size,
|
hwd->valid_size);
|
dev_info(dev, "dmac=%08x data stat=%08x data err=%08x\n",
|
hwd->dmac_cmd_status, hwd->data_status,
|
hwd->data_error);
|
dev_info(dev, "\n");
|
|
descr = descr->next;
|
} while (descr != start);
|
#endif
|
|
}
|
|
/**
|
* spider_net_resync_head_ptr - Advance head ptr past empty descrs
|
*
|
* If the driver fails to keep up and empty the queue, then the
|
* hardware wil run out of room to put incoming packets. This
|
* will cause the hardware to skip descrs that are full (instead
|
* of halting/retrying). Thus, once the driver runs, it wil need
|
* to "catch up" to where the hardware chain pointer is at.
|
*/
|
static void spider_net_resync_head_ptr(struct spider_net_card *card)
|
{
|
unsigned long flags;
|
struct spider_net_descr_chain *chain = &card->rx_chain;
|
struct spider_net_descr *descr;
|
int i, status;
|
|
/* Advance head pointer past any empty descrs */
|
descr = chain->head;
|
status = spider_net_get_descr_status(descr->hwdescr);
|
|
if (status == SPIDER_NET_DESCR_NOT_IN_USE)
|
return;
|
|
spin_lock_irqsave(&chain->lock, flags);
|
|
descr = chain->head;
|
status = spider_net_get_descr_status(descr->hwdescr);
|
for (i=0; i<chain->num_desc; i++) {
|
if (status != SPIDER_NET_DESCR_CARDOWNED) break;
|
descr = descr->next;
|
status = spider_net_get_descr_status(descr->hwdescr);
|
}
|
chain->head = descr;
|
|
spin_unlock_irqrestore(&chain->lock, flags);
|
}
|
|
static int spider_net_resync_tail_ptr(struct spider_net_card *card)
|
{
|
struct spider_net_descr_chain *chain = &card->rx_chain;
|
struct spider_net_descr *descr;
|
int i, status;
|
|
/* Advance tail pointer past any empty and reaped descrs */
|
descr = chain->tail;
|
status = spider_net_get_descr_status(descr->hwdescr);
|
|
for (i=0; i<chain->num_desc; i++) {
|
if ((status != SPIDER_NET_DESCR_CARDOWNED) &&
|
(status != SPIDER_NET_DESCR_NOT_IN_USE)) break;
|
descr = descr->next;
|
status = spider_net_get_descr_status(descr->hwdescr);
|
}
|
chain->tail = descr;
|
|
if ((i == chain->num_desc) || (i == 0))
|
return 1;
|
return 0;
|
}
|
|
/**
|
* spider_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. This function is called
|
* in softirq context, e.g. either bottom half from interrupt or
|
* NAPI polling context.
|
*/
|
static int
|
spider_net_decode_one_descr(struct spider_net_card *card)
|
{
|
struct net_device *dev = card->netdev;
|
struct spider_net_descr_chain *chain = &card->rx_chain;
|
struct spider_net_descr *descr = chain->tail;
|
struct spider_net_hw_descr *hwdescr = descr->hwdescr;
|
u32 hw_buf_addr;
|
int status;
|
|
status = spider_net_get_descr_status(hwdescr);
|
|
/* Nothing in the descriptor, or ring must be empty */
|
if ((status == SPIDER_NET_DESCR_CARDOWNED) ||
|
(status == SPIDER_NET_DESCR_NOT_IN_USE))
|
return 0;
|
|
/* descriptor definitively used -- move on tail */
|
chain->tail = descr->next;
|
|
/* unmap descriptor */
|
hw_buf_addr = hwdescr->buf_addr;
|
hwdescr->buf_addr = 0xffffffff;
|
pci_unmap_single(card->pdev, hw_buf_addr,
|
SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
|
|
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))
|
dev_err(&dev->dev,
|
"dropping RX descriptor with state %d\n", status);
|
dev->stats.rx_dropped++;
|
goto bad_desc;
|
}
|
|
if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
|
(status != SPIDER_NET_DESCR_FRAME_END) ) {
|
if (netif_msg_rx_err(card))
|
dev_err(&card->netdev->dev,
|
"RX descriptor with unknown state %d\n", status);
|
card->spider_stats.rx_desc_unk_state++;
|
goto bad_desc;
|
}
|
|
/* The cases we'll throw away the packet immediately */
|
if (hwdescr->data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
|
if (netif_msg_rx_err(card))
|
dev_err(&card->netdev->dev,
|
"error in received descriptor found, "
|
"data_status=x%08x, data_error=x%08x\n",
|
hwdescr->data_status, hwdescr->data_error);
|
goto bad_desc;
|
}
|
|
if (hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_BAD_STATUS) {
|
dev_err(&card->netdev->dev, "bad status, cmd_status=x%08x\n",
|
hwdescr->dmac_cmd_status);
|
pr_err("buf_addr=x%08x\n", hw_buf_addr);
|
pr_err("buf_size=x%08x\n", hwdescr->buf_size);
|
pr_err("next_descr_addr=x%08x\n", hwdescr->next_descr_addr);
|
pr_err("result_size=x%08x\n", hwdescr->result_size);
|
pr_err("valid_size=x%08x\n", hwdescr->valid_size);
|
pr_err("data_status=x%08x\n", hwdescr->data_status);
|
pr_err("data_error=x%08x\n", hwdescr->data_error);
|
pr_err("which=%ld\n", descr - card->rx_chain.ring);
|
|
card->spider_stats.rx_desc_error++;
|
goto bad_desc;
|
}
|
|
/* Ok, we've got a packet in descr */
|
spider_net_pass_skb_up(descr, card);
|
descr->skb = NULL;
|
hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
|
return 1;
|
|
bad_desc:
|
if (netif_msg_rx_err(card))
|
show_rx_chain(card);
|
dev_kfree_skb_irq(descr->skb);
|
descr->skb = NULL;
|
hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
|
return 0;
|
}
|
|
/**
|
* 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 napi_struct *napi, int budget)
|
{
|
struct spider_net_card *card = container_of(napi, struct spider_net_card, napi);
|
int packets_done = 0;
|
|
while (packets_done < budget) {
|
if (!spider_net_decode_one_descr(card))
|
break;
|
|
packets_done++;
|
}
|
|
if ((packets_done == 0) && (card->num_rx_ints != 0)) {
|
if (!spider_net_resync_tail_ptr(card))
|
packets_done = budget;
|
spider_net_resync_head_ptr(card);
|
}
|
card->num_rx_ints = 0;
|
|
spider_net_refill_rx_chain(card);
|
spider_net_enable_rxdmac(card);
|
|
spider_net_cleanup_tx_ring(&card->tx_timer);
|
|
/* if all packets are in the stack, enable interrupts and return 0 */
|
/* if not, return 1 */
|
if (packets_done < budget) {
|
napi_complete_done(napi, packets_done);
|
spider_net_rx_irq_on(card);
|
card->ignore_rx_ramfull = 0;
|
}
|
|
return packets_done;
|
}
|
|
/**
|
* 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, regvalue;
|
struct sockaddr *addr = p;
|
|
if (!is_valid_ether_addr(addr->sa_data))
|
return -EADDRNOTAVAIL;
|
|
memcpy(netdev->dev_addr, addr->sa_data, ETH_ALEN);
|
|
/* switch off GMACTPE and GMACRPE */
|
regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
|
regvalue &= ~((1 << 5) | (1 << 6));
|
spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
|
|
/* write mac */
|
macu = (netdev->dev_addr[0]<<24) + (netdev->dev_addr[1]<<16) +
|
(netdev->dev_addr[2]<<8) + (netdev->dev_addr[3]);
|
macl = (netdev->dev_addr[4]<<8) + (netdev->dev_addr[5]);
|
spider_net_write_reg(card, SPIDER_NET_GMACUNIMACU, macu);
|
spider_net_write_reg(card, SPIDER_NET_GMACUNIMACL, macl);
|
|
/* switch GMACTPE and GMACRPE back on */
|
regvalue = spider_net_read_reg(card, SPIDER_NET_GMACOPEMD);
|
regvalue |= ((1 << 5) | (1 << 6));
|
spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, regvalue);
|
|
spider_net_set_promisc(card);
|
|
return 0;
|
}
|
|
/**
|
* spider_net_link_reset
|
* @netdev: net device structure
|
*
|
* This is called when the PHY_LINK signal is asserted. For the blade this is
|
* not connected so we should never get here.
|
*
|
*/
|
static void
|
spider_net_link_reset(struct net_device *netdev)
|
{
|
|
struct spider_net_card *card = netdev_priv(netdev);
|
|
del_timer_sync(&card->aneg_timer);
|
|
/* clear interrupt, block further interrupts */
|
spider_net_write_reg(card, SPIDER_NET_GMACST,
|
spider_net_read_reg(card, SPIDER_NET_GMACST));
|
spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
|
|
/* reset phy and setup aneg */
|
card->aneg_count = 0;
|
card->medium = BCM54XX_COPPER;
|
spider_net_setup_aneg(card);
|
mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
|
|
}
|
|
/**
|
* 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, u32 error_reg2)
|
{
|
u32 i;
|
int show_error = 1;
|
|
/* 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_GFIFOINT:
|
case SPIDER_NET_DMACINT:
|
case SPIDER_NET_GSYSINT:
|
break; */
|
|
case SPIDER_NET_GIPSINT:
|
show_error = 0;
|
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))
|
dev_err(&card->netdev->dev, "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:
|
case SPIDER_NET_GDCDEN0INT:
|
case SPIDER_NET_GDBDEN0INT:
|
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:
|
/* TX RAM full may happen on a usual case.
|
* Logging is not needed. */
|
show_error = 0;
|
break;
|
case SPIDER_NET_GRFDFLLINT:
|
case SPIDER_NET_GRFCFLLINT:
|
case SPIDER_NET_GRFBFLLINT:
|
case SPIDER_NET_GRFAFLLINT:
|
case SPIDER_NET_GRMFLLINT:
|
/* Could happen when rx chain is full */
|
if (card->ignore_rx_ramfull == 0) {
|
card->ignore_rx_ramfull = 1;
|
spider_net_resync_head_ptr(card);
|
spider_net_refill_rx_chain(card);
|
spider_net_enable_rxdmac(card);
|
card->num_rx_ints ++;
|
napi_schedule(&card->napi);
|
}
|
show_error = 0;
|
break;
|
|
/* case SPIDER_NET_GTMSHTINT: problem, print a message */
|
case SPIDER_NET_GDTINVDINT:
|
/* allrighty. tx from previous descr ok */
|
show_error = 0;
|
break;
|
|
/* chain end */
|
case SPIDER_NET_GDDDCEINT:
|
case SPIDER_NET_GDCDCEINT:
|
case SPIDER_NET_GDBDCEINT:
|
case SPIDER_NET_GDADCEINT:
|
spider_net_resync_head_ptr(card);
|
spider_net_refill_rx_chain(card);
|
spider_net_enable_rxdmac(card);
|
card->num_rx_ints ++;
|
napi_schedule(&card->napi);
|
show_error = 0;
|
break;
|
|
/* invalid descriptor */
|
case SPIDER_NET_GDDINVDINT:
|
case SPIDER_NET_GDCINVDINT:
|
case SPIDER_NET_GDBINVDINT:
|
case SPIDER_NET_GDAINVDINT:
|
/* Could happen when rx chain is full */
|
spider_net_resync_head_ptr(card);
|
spider_net_refill_rx_chain(card);
|
spider_net_enable_rxdmac(card);
|
card->num_rx_ints ++;
|
napi_schedule(&card->napi);
|
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)) && net_ratelimit())
|
dev_err(&card->netdev->dev, "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: interrupt number
|
* @ptr: pointer to net_device
|
*
|
* 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 net_device *netdev = ptr;
|
struct spider_net_card *card = netdev_priv(netdev);
|
u32 status_reg, error_reg1, error_reg2;
|
|
status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS);
|
error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS);
|
error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS);
|
|
if (!(status_reg & SPIDER_NET_INT0_MASK_VALUE) &&
|
!(error_reg1 & SPIDER_NET_INT1_MASK_VALUE) &&
|
!(error_reg2 & SPIDER_NET_INT2_MASK_VALUE))
|
return IRQ_NONE;
|
|
if (status_reg & SPIDER_NET_RXINT ) {
|
spider_net_rx_irq_off(card);
|
napi_schedule(&card->napi);
|
card->num_rx_ints ++;
|
}
|
if (status_reg & SPIDER_NET_TXINT)
|
napi_schedule(&card->napi);
|
|
if (status_reg & SPIDER_NET_LINKINT)
|
spider_net_link_reset(netdev);
|
|
if (status_reg & SPIDER_NET_ERRINT )
|
spider_net_handle_error_irq(card, status_reg,
|
error_reg1, error_reg2);
|
|
/* 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.rst
|
*/
|
static void
|
spider_net_poll_controller(struct net_device *netdev)
|
{
|
disable_irq(netdev->irq);
|
spider_net_interrupt(netdev->irq, netdev);
|
enable_irq(netdev->irq);
|
}
|
#endif /* CONFIG_NET_POLL_CONTROLLER */
|
|
/**
|
* spider_net_enable_interrupts - enable interrupts
|
* @card: card structure
|
*
|
* spider_net_enable_interrupt enables several interrupts
|
*/
|
static void
|
spider_net_enable_interrupts(struct spider_net_card *card)
|
{
|
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_disable_interrupts - disable interrupts
|
* @card: card structure
|
*
|
* spider_net_disable_interrupts disables all the interrupts
|
*/
|
static void
|
spider_net_disable_interrupts(struct spider_net_card *card)
|
{
|
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_GMACINTEN, 0);
|
}
|
|
/**
|
* 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);
|
|
/* trigger ETOMOD signal */
|
spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
|
spider_net_read_reg(card, SPIDER_NET_GMACOPEMD) | 0x4);
|
|
spider_net_disable_interrupts(card);
|
}
|
|
/**
|
* 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, 0x10000000 },
|
{ SPIDER_NET_GTTQMSK, 0x00400040 },
|
|
{ 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 address 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);
|
|
spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
|
SPIDER_NET_LENLMT_VALUE);
|
spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
|
SPIDER_NET_OPMODE_VALUE);
|
|
spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
|
SPIDER_NET_GDTBSTA);
|
}
|
|
/**
|
* spider_net_download_firmware - loads firmware into the adapter
|
* @card: card structure
|
* @firmware_ptr: pointer to firmware data
|
*
|
* spider_net_download_firmware loads the firmware data into the
|
* adapter. It assumes the length etc. to be allright.
|
*/
|
static int
|
spider_net_download_firmware(struct spider_net_card *card,
|
const void *firmware_ptr)
|
{
|
int sequencer, i;
|
const u32 *fw_ptr = firmware_ptr;
|
|
/* stop sequencers */
|
spider_net_write_reg(card, SPIDER_NET_GSINIT,
|
SPIDER_NET_STOP_SEQ_VALUE);
|
|
for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
|
sequencer++) {
|
spider_net_write_reg(card,
|
SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
|
for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
|
spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
|
sequencer * 8, *fw_ptr);
|
fw_ptr++;
|
}
|
}
|
|
if (spider_net_read_reg(card, SPIDER_NET_GSINIT))
|
return -EIO;
|
|
spider_net_write_reg(card, SPIDER_NET_GSINIT,
|
SPIDER_NET_RUN_SEQ_VALUE);
|
|
return 0;
|
}
|
|
/**
|
* 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)
|
{
|
struct firmware *firmware = NULL;
|
struct device_node *dn;
|
const u8 *fw_prop = NULL;
|
int err = -ENOENT;
|
int fw_size;
|
|
if (request_firmware((const struct firmware **)&firmware,
|
SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) {
|
if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) &&
|
netif_msg_probe(card) ) {
|
dev_err(&card->netdev->dev,
|
"Incorrect size of spidernet firmware in " \
|
"filesystem. Looking in host firmware...\n");
|
goto try_host_fw;
|
}
|
err = spider_net_download_firmware(card, firmware->data);
|
|
release_firmware(firmware);
|
if (err)
|
goto try_host_fw;
|
|
goto done;
|
}
|
|
try_host_fw:
|
dn = pci_device_to_OF_node(card->pdev);
|
if (!dn)
|
goto out_err;
|
|
fw_prop = of_get_property(dn, "firmware", &fw_size);
|
if (!fw_prop)
|
goto out_err;
|
|
if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) &&
|
netif_msg_probe(card) ) {
|
dev_err(&card->netdev->dev,
|
"Incorrect size of spidernet firmware in host firmware\n");
|
goto done;
|
}
|
|
err = spider_net_download_firmware(card, fw_prop);
|
|
done:
|
return err;
|
out_err:
|
if (netif_msg_probe(card))
|
dev_err(&card->netdev->dev,
|
"Couldn't find spidernet firmware in filesystem " \
|
"or host firmware\n");
|
return err;
|
}
|
|
/**
|
* 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 = spider_net_init_firmware(card);
|
if (result)
|
goto init_firmware_failed;
|
|
/* start probing with copper */
|
card->aneg_count = 0;
|
card->medium = BCM54XX_COPPER;
|
spider_net_setup_aneg(card);
|
if (card->phy.def->phy_id)
|
mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
|
|
result = spider_net_init_chain(card, &card->tx_chain);
|
if (result)
|
goto alloc_tx_failed;
|
card->low_watermark = NULL;
|
|
result = spider_net_init_chain(card, &card->rx_chain);
|
if (result)
|
goto alloc_rx_failed;
|
|
/* Allocate rx skbs */
|
result = spider_net_alloc_rx_skbs(card);
|
if (result)
|
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,
|
IRQF_SHARED, netdev->name, netdev))
|
goto register_int_failed;
|
|
spider_net_enable_card(card);
|
|
netif_start_queue(netdev);
|
netif_carrier_on(netdev);
|
napi_enable(&card->napi);
|
|
spider_net_enable_interrupts(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:
|
del_timer_sync(&card->aneg_timer);
|
init_firmware_failed:
|
return result;
|
}
|
|
/**
|
* spider_net_link_phy
|
* @data: used for pointer to card structure
|
*
|
*/
|
static void spider_net_link_phy(struct timer_list *t)
|
{
|
struct spider_net_card *card = from_timer(card, t, aneg_timer);
|
struct mii_phy *phy = &card->phy;
|
|
/* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */
|
if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) {
|
|
pr_debug("%s: link is down trying to bring it up\n",
|
card->netdev->name);
|
|
switch (card->medium) {
|
case BCM54XX_COPPER:
|
/* enable fiber with autonegotiation first */
|
if (phy->def->ops->enable_fiber)
|
phy->def->ops->enable_fiber(phy, 1);
|
card->medium = BCM54XX_FIBER;
|
break;
|
|
case BCM54XX_FIBER:
|
/* fiber didn't come up, try to disable fiber autoneg */
|
if (phy->def->ops->enable_fiber)
|
phy->def->ops->enable_fiber(phy, 0);
|
card->medium = BCM54XX_UNKNOWN;
|
break;
|
|
case BCM54XX_UNKNOWN:
|
/* copper, fiber with and without failed,
|
* retry from beginning */
|
spider_net_setup_aneg(card);
|
card->medium = BCM54XX_COPPER;
|
break;
|
}
|
|
card->aneg_count = 0;
|
mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
|
return;
|
}
|
|
/* link still not up, try again later */
|
if (!(phy->def->ops->poll_link(phy))) {
|
card->aneg_count++;
|
mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
|
return;
|
}
|
|
/* link came up, get abilities */
|
phy->def->ops->read_link(phy);
|
|
spider_net_write_reg(card, SPIDER_NET_GMACST,
|
spider_net_read_reg(card, SPIDER_NET_GMACST));
|
spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4);
|
|
if (phy->speed == 1000)
|
spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001);
|
else
|
spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0);
|
|
card->aneg_count = 0;
|
|
pr_info("%s: link up, %i Mbps, %s-duplex %sautoneg.\n",
|
card->netdev->name, phy->speed,
|
phy->duplex == 1 ? "Full" : "Half",
|
phy->autoneg == 1 ? "" : "no ");
|
}
|
|
/**
|
* 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.
|
**/
|
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->dev = card->netdev;
|
phy->mdio_read = spider_net_read_phy;
|
phy->mdio_write = spider_net_write_phy;
|
|
for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) {
|
unsigned short id;
|
id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
|
if (id != 0x0000 && id != 0xffff) {
|
if (!sungem_phy_probe(phy, phy->mii_id)) {
|
pr_info("Found %s.\n", phy->def->name);
|
break;
|
}
|
}
|
}
|
|
return 0;
|
}
|
|
/**
|
* 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 < SPIDER_NET_FIRMWARE_SEQS;
|
sequencer++) {
|
spider_net_write_reg(card, SPIDER_NET_GSnPRGADR +
|
sequencer * 8, 0x0);
|
for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; 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_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);
|
|
napi_disable(&card->napi);
|
netif_carrier_off(netdev);
|
netif_stop_queue(netdev);
|
del_timer_sync(&card->tx_timer);
|
del_timer_sync(&card->aneg_timer);
|
|
spider_net_disable_interrupts(card);
|
|
free_irq(netdev->irq, netdev);
|
|
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);
|
spider_net_free_rx_chain_contents(card);
|
|
spider_net_free_chain(card, &card->tx_chain);
|
spider_net_free_chain(card, &card->rx_chain);
|
|
return 0;
|
}
|
|
/**
|
* 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(struct work_struct *work)
|
{
|
struct spider_net_card *card =
|
container_of(work, struct spider_net_card, tx_timeout_task);
|
struct net_device *netdev = card->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;
|
|
spider_net_open(netdev);
|
spider_net_kick_tx_dma(card);
|
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, unsigned int txqueue)
|
{
|
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);
|
card->spider_stats.tx_timeouts++;
|
}
|
|
static const struct net_device_ops spider_net_ops = {
|
.ndo_open = spider_net_open,
|
.ndo_stop = spider_net_stop,
|
.ndo_start_xmit = spider_net_xmit,
|
.ndo_set_rx_mode = spider_net_set_multi,
|
.ndo_set_mac_address = spider_net_set_mac,
|
.ndo_do_ioctl = spider_net_do_ioctl,
|
.ndo_tx_timeout = spider_net_tx_timeout,
|
.ndo_validate_addr = eth_validate_addr,
|
/* HW VLAN */
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
/* poll controller */
|
.ndo_poll_controller = spider_net_poll_controller,
|
#endif /* CONFIG_NET_POLL_CONTROLLER */
|
};
|
|
/**
|
* 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->netdev_ops = &spider_net_ops;
|
netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT;
|
/* 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;
|
const u8 *mac;
|
|
SET_NETDEV_DEV(netdev, &card->pdev->dev);
|
|
pci_set_drvdata(card->pdev, netdev);
|
|
timer_setup(&card->tx_timer, spider_net_cleanup_tx_ring, 0);
|
netdev->irq = card->pdev->irq;
|
|
card->aneg_count = 0;
|
timer_setup(&card->aneg_timer, spider_net_link_phy, 0);
|
|
netif_napi_add(netdev, &card->napi,
|
spider_net_poll, SPIDER_NET_NAPI_WEIGHT);
|
|
spider_net_setup_netdev_ops(netdev);
|
|
netdev->hw_features = NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
|
if (SPIDER_NET_RX_CSUM_DEFAULT)
|
netdev->features |= NETIF_F_RXCSUM;
|
netdev->features |= NETIF_F_IP_CSUM | NETIF_F_LLTX;
|
/* some time: NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
|
* NETIF_F_HW_VLAN_CTAG_FILTER */
|
|
/* MTU range: 64 - 2294 */
|
netdev->min_mtu = SPIDER_NET_MIN_MTU;
|
netdev->max_mtu = SPIDER_NET_MAX_MTU;
|
|
netdev->irq = card->pdev->irq;
|
card->num_rx_ints = 0;
|
card->ignore_rx_ramfull = 0;
|
|
dn = pci_device_to_OF_node(card->pdev);
|
if (!dn)
|
return -EIO;
|
|
mac = of_get_property(dn, "local-mac-address", NULL);
|
if (!mac)
|
return -EIO;
|
memcpy(addr.sa_data, mac, ETH_ALEN);
|
|
result = spider_net_set_mac(netdev, &addr);
|
if ((result) && (netif_msg_probe(card)))
|
dev_err(&card->netdev->dev,
|
"Failed to set MAC address: %i\n", result);
|
|
result = register_netdev(netdev);
|
if (result) {
|
if (netif_msg_probe(card))
|
dev_err(&card->netdev->dev,
|
"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;
|
|
netdev = alloc_etherdev(struct_size(card, darray,
|
tx_descriptors + rx_descriptors));
|
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);
|
init_waitqueue_head(&card->waitq);
|
atomic_set(&card->tx_timeout_task_counter, 0);
|
|
card->rx_chain.num_desc = rx_descriptors;
|
card->rx_chain.ring = card->darray;
|
card->tx_chain.num_desc = tx_descriptors;
|
card->tx_chain.ring = card->darray + rx_descriptors;
|
|
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
|
* @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)) {
|
dev_err(&pdev->dev, "Couldn't enable PCI device\n");
|
return NULL;
|
}
|
|
if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
|
dev_err(&pdev->dev,
|
"Couldn't find proper PCI device base address.\n");
|
goto out_disable_dev;
|
}
|
|
if (pci_request_regions(pdev, spider_net_driver_name)) {
|
dev_err(&pdev->dev,
|
"Couldn't obtain PCI resources, aborting.\n");
|
goto out_disable_dev;
|
}
|
|
pci_set_master(pdev);
|
|
card = spider_net_alloc_card();
|
if (!card) {
|
dev_err(&pdev->dev,
|
"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) {
|
dev_err(&pdev->dev,
|
"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);
|
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
|
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_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
|
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);
|
|
/* switch off 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_undo_pci_setup(card);
|
free_netdev(netdev);
|
}
|
|
static struct pci_driver spider_net_driver = {
|
.name = spider_net_driver_name,
|
.id_table = spider_net_pci_tbl,
|
.probe = spider_net_probe,
|
.remove = 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)
|
{
|
printk(KERN_INFO "Spidernet version %s.\n", VERSION);
|
|
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);
|
