| /* |
| * 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/ioport.h> |
| #include <linux/ip.h> |
| #include <linux/kernel.h> |
| #include <linux/mii.h> |
| #include <linux/module.h> |
| #include <linux/netdevice.h> |
| #include <linux/device.h> |
| #include <linux/pci.h> |
| #include <linux/skbuff.h> |
| #include <linux/slab.h> |
| #include <linux/tcp.h> |
| #include <linux/types.h> |
| #include <linux/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); |
| |
| 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 struct pci_device_id spider_net_pci_tbl[] = { |
| { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET, |
| PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, |
| { 0, } |
| }; |
| |
| MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl); |
| |
| /** |
| * spider_net_read_reg - reads an SMMIO register of a card |
| * @card: device structure |
| * @reg: register to read from |
| * |
| * returns the content of the specified SMMIO register. |
| */ |
| static 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 succes, <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 adresses 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 dev_mc_list *mc; |
| u8 hash; |
| int i; |
| u32 reg; |
| struct spider_net_card *card = netdev_priv(netdev); |
| unsigned long bitmask[SPIDER_NET_MULTICAST_HASHES / BITS_PER_LONG] = |
| {0, }; |
| |
| spider_net_set_promisc(card); |
| |
| if (netdev->flags & IFF_ALLMULTI) { |
| for (i = 0; i < SPIDER_NET_MULTICAST_HASHES; i++) { |
| set_bit(i, bitmask); |
| } |
| goto write_hash; |
| } |
| |
| /* well, we know, what the broadcast hash value is: it's xfd |
| hash = spider_net_get_multicast_hash(netdev, netdev->broadcast); */ |
| set_bit(0xfd, bitmask); |
| |
| for (mc = netdev->mc_list; mc; mc = mc->next) { |
| hash = spider_net_get_multicast_hash(netdev, mc->dmi_addr); |
| set_bit(hash, bitmask); |
| } |
| |
| write_hash: |
| for (i = 0; i < SPIDER_NET_MULTICAST_HASHES / 4; i++) { |
| reg = 0; |
| if (test_bit(i * 4, bitmask)) |
| reg += 0x08; |
| reg <<= 8; |
| if (test_bit(i * 4 + 1, bitmask)) |
| reg += 0x08; |
| reg <<= 8; |
| if (test_bit(i * 4 + 2, bitmask)) |
| reg += 0x08; |
| reg <<= 8; |
| if (test_bit(i * 4 + 3, bitmask)) |
| reg += 0x08; |
| |
| spider_net_write_reg(card, SPIDER_NET_GMRMHFILnR + i * 4, reg); |
| } |
| } |
| |
| /** |
| * spider_net_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 */ |
| if (card->options.rx_csum) { |
| 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; |
| else |
| skb->ip_summed = CHECKSUM_NONE; |
| } else |
| skb->ip_summed = CHECKSUM_NONE; |
| |
| if (data_status & SPIDER_NET_VLAN_PACKET) { |
| /* further enhancements: HW-accel VLAN |
| * vlan_hwaccel_receive_skb |
| */ |
| } |
| |
| /* 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 adress for RX chains and |
| * enable DMA */ |
| spider_net_enable_rxchtails(card); |
| spider_net_enable_rxdmac(card); |
| |
| spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE); |
| |
| 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 "); |
| |
| return; |
| } |
| |
| /** |
| * 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; |
| /* 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; |
| |
| card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT; |
| |
| netif_napi_add(netdev, &card->napi, |
| spider_net_poll, SPIDER_NET_NAPI_WEIGHT); |
| |
| spider_net_setup_netdev_ops(netdev); |
| |
| 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); |