diff options
Diffstat (limited to 'drivers/net/spider_net.c')
| -rw-r--r-- | drivers/net/spider_net.c | 2603 |
1 files changed, 0 insertions, 2603 deletions
diff --git a/drivers/net/spider_net.c b/drivers/net/spider_net.c deleted file mode 100644 index 1ff3491c..0000000 --- a/drivers/net/spider_net.c +++ /dev/null @@ -1,2603 +0,0 @@ -/* - * Network device driver for Cell Processor-Based Blade and Celleb platform - * - * (C) Copyright IBM Corp. 2005 - * (C) Copyright 2006 TOSHIBA CORPORATION - * - * 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/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/in.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/gfp.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/tcp.h> -#include <linux/types.h> -#include <linux/vmalloc.h> -#include <linux/wait.h> -#include <linux/workqueue.h> -#include <linux/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"); -MODULE_VERSION(VERSION); -MODULE_FIRMWARE(SPIDER_NET_FIRMWARE_NAME); - -static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT; -static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT; - -module_param(rx_descriptors, int, 0444); -module_param(tx_descriptors, int, 0444); - -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 DEFINE_PCI_DEVICE_TABLE(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 inline u32 -spider_net_read_reg(struct spider_net_card *card, u32 reg) -{ - /* We use the powerpc specific variants instead of readl_be() because - * we know spidernet is not a real PCI device and we can thus avoid the - * performance hit caused by the PCI workarounds. - */ - return in_be32(card->regs + reg); -} - -/** - * 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 inline void -spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value) -{ - /* We use the powerpc specific variants instead of writel_be() because - * we know spidernet is not a real PCI device and we can thus avoid the - * performance hit caused by the PCI workarounds. - */ - out_be32(card->regs + reg, value); -} - -/** 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_setup_aneg - initial auto-negotiation setup - * @card: device structure - **/ -static void -spider_net_setup_aneg(struct spider_net_card *card) -{ - struct mii_phy *phy = &card->phy; - u32 advertise = 0; - u16 bmsr, estat; - - bmsr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR); - estat = spider_net_read_phy(card->netdev, phy->mii_id, MII_ESTATUS); - - if (bmsr & BMSR_10HALF) - advertise |= ADVERTISED_10baseT_Half; - if (bmsr & BMSR_10FULL) - advertise |= ADVERTISED_10baseT_Full; - if (bmsr & BMSR_100HALF) - advertise |= ADVERTISED_100baseT_Half; - if (bmsr & BMSR_100FULL) - advertise |= ADVERTISED_100baseT_Full; - - if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_TFULL)) - advertise |= SUPPORTED_1000baseT_Full; - if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_THALF)) - advertise |= SUPPORTED_1000baseT_Half; - - mii_phy_probe(phy, phy->mii_id); - phy->def->ops->setup_aneg(phy, advertise); - -} - -/** - * 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; - - regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT); - spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue); -} - -/** - * 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; - - regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT; - spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue); -} - -/** - * 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 inline int -spider_net_get_descr_status(struct spider_net_hw_descr *hwdescr) -{ - return hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK; -} - -/** - * 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; - - descr = chain->ring; - do { - descr->bus_addr = 0; - descr->hwdescr->next_descr_addr = 0; - descr = descr->next; - } while (descr != chain->ring); - - dma_free_coherent(&card->pdev->dev, chain->num_desc, - chain->hwring, chain->dma_addr); -} - -/** - * spider_net_init_chain - alloc and link descriptor chain - * @card: card structure - * @chain: address of chain - * - * 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) -{ - int i; - struct spider_net_descr *descr; - struct spider_net_hw_descr *hwdescr; - dma_addr_t buf; - size_t alloc_size; - - alloc_size = chain->num_desc * sizeof(struct spider_net_hw_descr); - - chain->hwring = dma_alloc_coherent(&card->pdev->dev, alloc_size, - &chain->dma_addr, GFP_KERNEL); - - if (!chain->hwring) - return -ENOMEM; - - memset(chain->ring, 0, chain->num_desc * sizeof(struct spider_net_descr)); - - /* Set up the hardware pointers in each descriptor */ - descr = chain->ring; - hwdescr = chain->hwring; - buf = chain->dma_addr; - for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) { - hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE; - hwdescr->next_descr_addr = 0; - - descr->hwdescr = hwdescr; - descr->bus_addr = buf; - descr->next = descr + 1; - descr->prev = descr - 1; - - buf += sizeof(struct spider_net_hw_descr); - } - /* do actual circular list */ - (descr-1)->next = chain->ring; - chain->ring->prev = descr-1; - - spin_lock_init(&chain->lock); - chain->head = chain->ring; - chain->tail = chain->ring; - return 0; -} - -/** - * 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; - do { - 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; - } while (descr != card->rx_chain.head); -} - -/** - * spider_net_prepare_rx_descr - Reinitialize RX descriptor - * @card: card structure - * @descr: descriptor to re-init - * - * Return 0 on success, <0 on failure. - * - * Allocates a new rx skb, iommu-maps it and attaches it to the - * descriptor. Mark the descriptor as activated, ready-to-use. - */ -static int -spider_net_prepare_rx_descr(struct spider_net_card *card, - struct spider_net_descr *descr) -{ - struct spider_net_hw_descr *hwdescr = descr->hwdescr; - dma_addr_t buf; - int offset; - 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) & - (~(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 -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); - 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); - - 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; - - card->netdev->trans_start = jiffies; /* 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) */ - - 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_kfree_skb(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 0 on success, !0 on failure - */ -static int -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 spider_net_card *card) -{ - 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); - - /* if all packets are in the stack, enable interrupts and return 0 */ - /* if not, return 1 */ - if (packets_done < budget) { - napi_complete(napi); - spider_net_rx_irq_on(card); - card->ignore_rx_ramfull = 0; - } - - return packets_done; -} - -/** - * 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, regvalue; - struct sockaddr *addr = p; - - if (!is_valid_ether_addr(addr->sa_data)) - return -EADDRNOTAVAIL; - - /* 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 = (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); - - /* 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); - - /* 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_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: /* 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: - /* TX RAM full may happen on a usual case. - * Logging is not needed. */ - show_error = 0; - break; - case SPIDER_NET_GRFDFLLINT: /* fallthrough */ - case SPIDER_NET_GRFCFLLINT: /* fallthrough */ - case SPIDER_NET_GRFBFLLINT: /* fallthrough */ - case SPIDER_NET_GRFAFLLINT: /* fallthrough */ - 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: /* fallthrough */ - case SPIDER_NET_GDCDCEINT: /* fallthrough */ - case SPIDER_NET_GDBDCEINT: /* fallthrough */ - 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: /* fallthrough */ - case SPIDER_NET_GDCINVDINT: /* fallthrough */ - case SPIDER_NET_GDBINVDINT: /* fallthrough */ - 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.txt - */ -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 */ - 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, - 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(unsigned long data) -{ - struct spider_net_card *card = (struct spider_net_card *)data; - 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 (!mii_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) -{ - 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_multicast_list = spider_net_set_multi, - .ndo_set_mac_address = spider_net_set_mac, - .ndo_change_mtu = spider_net_change_mtu, - .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); - - init_timer(&card->tx_timer); - card->tx_timer.function = - (void (*)(unsigned long)) spider_net_cleanup_tx_ring; - card->tx_timer.data = (unsigned long) card; - netdev->irq = card->pdev->irq; - - card->aneg_count = 0; - init_timer(&card->aneg_timer); - card->aneg_timer.function = spider_net_link_phy; - card->aneg_timer.data = (unsigned long) card; - - 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_TX | NETIF_F_HW_VLAN_RX | - * NETIF_F_HW_VLAN_FILTER */ - - 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; - size_t alloc_size; - - alloc_size = sizeof(struct spider_net_card) + - (tx_descriptors + rx_descriptors) * sizeof(struct spider_net_descr); - 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); - 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); - 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_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); - - /* 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 = __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) -{ - 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); |