diff options
Diffstat (limited to 'drivers/net/spider_net.c')
| -rw-r--r-- | drivers/net/spider_net.c | 2355 |
1 files changed, 0 insertions, 2355 deletions
diff --git a/drivers/net/spider_net.c b/drivers/net/spider_net.c deleted file mode 100644 index 1f5975a61e1..00000000000 --- a/drivers/net/spider_net.c +++ /dev/null @@ -1,2355 +0,0 @@ -/* - * Network device driver for Cell Processor-Based Blade - * - * (C) Copyright IBM Corp. 2005 - * - * Authors : Utz Bacher <utz.bacher@de.ibm.com> - * Jens Osterkamp <Jens.Osterkamp@de.ibm.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include <linux/config.h> -#include <linux/compiler.h> -#include <linux/crc32.h> -#include <linux/delay.h> -#include <linux/etherdevice.h> -#include <linux/ethtool.h> -#include <linux/firmware.h> -#include <linux/if_vlan.h> -#include <linux/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 <asm/bitops.h> -#include <asm/pci-bridge.h> -#include <net/checksum.h> - -#include "spider_net.h" - -MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com> and Jens Osterkamp " \ - "<Jens.Osterkamp@de.ibm.com>"); -MODULE_DESCRIPTION("Spider Southbridge Gigabit Ethernet driver"); -MODULE_LICENSE("GPL"); - -static int rx_descriptors = SPIDER_NET_RX_DESCRIPTORS_DEFAULT; -static int tx_descriptors = SPIDER_NET_TX_DESCRIPTORS_DEFAULT; - -module_param(rx_descriptors, int, 0644); -module_param(tx_descriptors, int, 0644); - -MODULE_PARM_DESC(rx_descriptors, "number of descriptors used " \ - "in rx chains"); -MODULE_PARM_DESC(tx_descriptors, "number of descriptors used " \ - "in tx chain"); - -char spider_net_driver_name[] = "spidernet"; - -static struct pci_device_id spider_net_pci_tbl[] = { - { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SPIDER_NET, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, - { 0, } -}; - -MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl); - -/** - * spider_net_read_reg - reads an SMMIO register of a card - * @card: device structure - * @reg: register to read from - * - * returns the content of the specified SMMIO register. - */ -static u32 -spider_net_read_reg(struct spider_net_card *card, u32 reg) -{ - u32 value; - - value = readl(card->regs + reg); - value = le32_to_cpu(value); - - return value; -} - -/** - * spider_net_write_reg - writes to an SMMIO register of a card - * @card: device structure - * @reg: register to write to - * @value: value to write into the specified SMMIO register - */ -static void -spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value) -{ - value = cpu_to_le32(value); - writel(value, card->regs + reg); -} - -/** spider_net_write_phy - write to phy register - * @netdev: adapter to be written to - * @mii_id: id of MII - * @reg: PHY register - * @val: value to be written to phy register - * - * spider_net_write_phy_register writes to an arbitrary PHY - * register via the spider GPCWOPCMD register. We assume the queue does - * not run full (not more than 15 commands outstanding). - **/ -static void -spider_net_write_phy(struct net_device *netdev, int mii_id, - int reg, int val) -{ - struct spider_net_card *card = netdev_priv(netdev); - u32 writevalue; - - writevalue = ((u32)mii_id << 21) | - ((u32)reg << 16) | ((u32)val); - - spider_net_write_reg(card, SPIDER_NET_GPCWOPCMD, writevalue); -} - -/** spider_net_read_phy - read from phy register - * @netdev: network device to be read from - * @mii_id: id of MII - * @reg: PHY register - * - * Returns value read from PHY register - * - * spider_net_write_phy reads from an arbitrary PHY - * register via the spider GPCROPCMD register - **/ -static int -spider_net_read_phy(struct net_device *netdev, int mii_id, int reg) -{ - struct spider_net_card *card = netdev_priv(netdev); - u32 readvalue; - - readvalue = ((u32)mii_id << 21) | ((u32)reg << 16); - spider_net_write_reg(card, SPIDER_NET_GPCROPCMD, readvalue); - - /* we don't use semaphores to wait for an SPIDER_NET_GPROPCMPINT - * interrupt, as we poll for the completion of the read operation - * in spider_net_read_phy. Should take about 50 us */ - do { - readvalue = spider_net_read_reg(card, SPIDER_NET_GPCROPCMD); - } while (readvalue & SPIDER_NET_GPREXEC); - - readvalue &= SPIDER_NET_GPRDAT_MASK; - - return readvalue; -} - -/** - * spider_net_rx_irq_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 enum spider_net_descr_status -spider_net_get_descr_status(struct spider_net_descr *descr) -{ - u32 cmd_status; - - cmd_status = descr->dmac_cmd_status; - cmd_status >>= SPIDER_NET_DESCR_IND_PROC_SHIFT; - /* no need to mask out any bits, as cmd_status is 32 bits wide only - * (and unsigned) */ - return cmd_status; -} - -/** - * spider_net_set_descr_status -- sets the status of a descriptor - * @descr: descriptor to change - * @status: status to set in the descriptor - * - * changes the status to the specified value. Doesn't change other bits - * in the status - */ -static void -spider_net_set_descr_status(struct spider_net_descr *descr, - enum spider_net_descr_status status) -{ - u32 cmd_status; - /* read the status */ - cmd_status = descr->dmac_cmd_status; - /* clean the upper 4 bits */ - cmd_status &= SPIDER_NET_DESCR_IND_PROC_MASKO; - /* add the status to it */ - cmd_status |= ((u32)status)<<SPIDER_NET_DESCR_IND_PROC_SHIFT; - /* and write it back */ - descr->dmac_cmd_status = cmd_status; -} - -/** - * spider_net_free_chain - free descriptor chain - * @card: card structure - * @chain: address of chain - * - */ -static void -spider_net_free_chain(struct spider_net_card *card, - struct spider_net_descr_chain *chain) -{ - struct spider_net_descr *descr; - - for (descr = chain->tail; !descr->bus_addr; descr = descr->next) { - pci_unmap_single(card->pdev, descr->bus_addr, - SPIDER_NET_DESCR_SIZE, PCI_DMA_BIDIRECTIONAL); - descr->bus_addr = 0; - } -} - -/** - * spider_net_init_chain - links descriptor chain - * @card: card structure - * @chain: address of chain - * @start_descr: address of descriptor array - * @no: number of descriptors - * - * we manage a circular list that mirrors the hardware structure, - * except that the hardware uses bus addresses. - * - * returns 0 on success, <0 on failure - */ -static int -spider_net_init_chain(struct spider_net_card *card, - struct spider_net_descr_chain *chain, - struct spider_net_descr *start_descr, int no) -{ - int i; - struct spider_net_descr *descr; - dma_addr_t buf; - - atomic_set(&card->rx_chain_refill,0); - - descr = start_descr; - memset(descr, 0, sizeof(*descr) * no); - - /* set up the hardware pointers in each descriptor */ - for (i=0; i<no; i++, descr++) { - spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE); - - buf = pci_map_single(card->pdev, descr, - SPIDER_NET_DESCR_SIZE, - PCI_DMA_BIDIRECTIONAL); - - if (buf == DMA_ERROR_CODE) - goto iommu_error; - - descr->bus_addr = buf; - descr->next = descr + 1; - descr->prev = descr - 1; - - } - /* do actual circular list */ - (descr-1)->next = start_descr; - start_descr->prev = descr-1; - - descr = start_descr; - for (i=0; i < no; i++, descr++) { - descr->next_descr_addr = descr->next->bus_addr; - } - - chain->head = start_descr; - chain->tail = start_descr; - - return 0; - -iommu_error: - descr = start_descr; - for (i=0; i < no; i++, descr++) - if (descr->bus_addr) - pci_unmap_single(card->pdev, descr->bus_addr, - SPIDER_NET_DESCR_SIZE, - PCI_DMA_BIDIRECTIONAL); - return -ENOMEM; -} - -/** - * spider_net_free_rx_chain_contents - frees descr contents in rx chain - * @card: card structure - * - * returns 0 on success, <0 on failure - */ -static void -spider_net_free_rx_chain_contents(struct spider_net_card *card) -{ - struct spider_net_descr *descr; - - descr = card->rx_chain.head; - while (descr->next != card->rx_chain.head) { - if (descr->skb) { - dev_kfree_skb(descr->skb); - pci_unmap_single(card->pdev, descr->buf_addr, - SPIDER_NET_MAX_FRAME, - PCI_DMA_BIDIRECTIONAL); - } - descr = descr->next; - } -} - -/** - * spider_net_prepare_rx_descr - reinitializes a rx descriptor - * @card: card structure - * @descr: descriptor to re-init - * - * return 0 on succes, <0 on failure - * - * allocates a new rx skb, iommu-maps it and attaches it to the descriptor. - * Activate the descriptor state-wise - */ -static int -spider_net_prepare_rx_descr(struct spider_net_card *card, - struct spider_net_descr *descr) -{ - dma_addr_t buf; - int error = 0; - 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 = dev_alloc_skb(bufsize + SPIDER_NET_RXBUF_ALIGN - 1); - if (!descr->skb) { - if (netif_msg_rx_err(card) && net_ratelimit()) - pr_err("Not enough memory to allocate rx buffer\n"); - return -ENOMEM; - } - descr->buf_size = bufsize; - descr->result_size = 0; - descr->valid_size = 0; - descr->data_status = 0; - descr->data_error = 0; - - offset = ((unsigned long)descr->skb->data) & - (SPIDER_NET_RXBUF_ALIGN - 1); - if (offset) - skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset); - /* io-mmu-map the skb */ - buf = pci_map_single(card->pdev, descr->skb->data, - SPIDER_NET_MAX_FRAME, PCI_DMA_BIDIRECTIONAL); - descr->buf_addr = buf; - if (buf == DMA_ERROR_CODE) { - dev_kfree_skb_any(descr->skb); - if (netif_msg_rx_err(card) && net_ratelimit()) - pr_err("Could not iommu-map rx buffer\n"); - spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE); - } else { - descr->dmac_cmd_status = SPIDER_NET_DMAC_RX_CARDOWNED; - } - - return error; -} - -/** - * spider_net_enable_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 void -spider_net_enable_rxchtails(struct spider_net_card *card) -{ - /* assume chain is aligned correctly */ - spider_net_write_reg(card, SPIDER_NET_GDADCHA , - card->rx_chain.tail->bus_addr); -} - -/** - * spider_net_enable_rxdmac - enables a receive DMA controller - * @card: card structure - * - * spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN - * in the GDADMACCNTR register - */ -static void -spider_net_enable_rxdmac(struct spider_net_card *card) -{ - wmb(); - spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, - SPIDER_NET_DMA_RX_VALUE); -} - -/** - * spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains - * @card: card structure - * - * refills descriptors in 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; - - chain = &card->rx_chain; - - /* 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 (atomic_inc_return(&card->rx_chain_refill) == 1) - while (spider_net_get_descr_status(chain->head) == - SPIDER_NET_DESCR_NOT_IN_USE) { - if (spider_net_prepare_rx_descr(card, chain->head)) - break; - chain->head = chain->head->next; - } - - atomic_dec(&card->rx_chain_refill); -} - -/** - * spider_net_alloc_rx_skbs - allocates rx skbs in rx descriptor chains - * @card: card structure - * - * returns 0 on success, <0 on failure - */ -static int -spider_net_alloc_rx_skbs(struct spider_net_card *card) -{ - int result; - struct spider_net_descr_chain *chain; - - result = -ENOMEM; - - chain = &card->rx_chain; - /* put at least one buffer into the chain. if this fails, - * we've got a problem. if not, spider_net_refill_rx_chain - * will do the rest at the end of this function */ - if (spider_net_prepare_rx_descr(card, chain->head)) - goto error; - else - chain->head = chain->head->next; - - /* this will allocate the rest of the rx buffers; if not, it's - * business as usual later on */ - spider_net_refill_rx_chain(card); - spider_net_enable_rxdmac(card); - return 0; - -error: - spider_net_free_rx_chain_contents(card); - return result; -} - -/** - * spider_net_release_tx_descr - processes a used tx descriptor - * @card: card structure - * @descr: descriptor to release - * - * releases a used tx descriptor (unmapping, freeing of skb) - */ -static void -spider_net_release_tx_descr(struct spider_net_card *card, - struct spider_net_descr *descr) -{ - struct sk_buff *skb; - - /* unmap the skb */ - skb = descr->skb; - pci_unmap_single(card->pdev, descr->buf_addr, skb->len, - PCI_DMA_BIDIRECTIONAL); - - dev_kfree_skb_any(skb); - - /* set status to not used */ - spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE); -} - -/** - * spider_net_release_tx_chain - processes sent tx descriptors - * @card: adapter structure - * @brutal: if set, don't care about whether descriptor seems to be in use - * - * 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 loose initiative. - */ -static int -spider_net_release_tx_chain(struct spider_net_card *card, int brutal) -{ - struct spider_net_descr_chain *tx_chain = &card->tx_chain; - enum spider_net_descr_status status; - - if (atomic_inc_return(&card->tx_chain_release) != 1) { - atomic_dec(&card->tx_chain_release); - return 1; - } - - for (;;) { - status = spider_net_get_descr_status(tx_chain->tail); - switch (status) { - case SPIDER_NET_DESCR_CARDOWNED: - if (!brutal) - goto out; - /* fallthrough, if we release the descriptors - * brutally (then we don't care about - * SPIDER_NET_DESCR_CARDOWNED) */ - case SPIDER_NET_DESCR_RESPONSE_ERROR: - case SPIDER_NET_DESCR_PROTECTION_ERROR: - case SPIDER_NET_DESCR_FORCE_END: - if (netif_msg_tx_err(card)) - pr_err("%s: forcing end of tx descriptor " - "with status x%02x\n", - card->netdev->name, status); - card->netdev_stats.tx_dropped++; - break; - - case SPIDER_NET_DESCR_COMPLETE: - card->netdev_stats.tx_packets++; - card->netdev_stats.tx_bytes += - tx_chain->tail->skb->len; - break; - - default: /* any other value (== SPIDER_NET_DESCR_NOT_IN_USE) */ - goto out; - } - spider_net_release_tx_descr(card, tx_chain->tail); - tx_chain->tail = tx_chain->tail->next; - } -out: - atomic_dec(&card->tx_chain_release); - - netif_wake_queue(card->netdev); - - if (status == SPIDER_NET_DESCR_CARDOWNED) - return 1; - return 0; -} - -/** - * spider_net_cleanup_tx_ring - cleans up the TX ring - * @card: card structure - * - * spider_net_cleanup_tx_ring is called by the tx_timer (as we don't use - * interrupts to cleanup our TX ring) and returns sent packets to the stack - * by freeing them - */ -static void -spider_net_cleanup_tx_ring(struct spider_net_card *card) -{ - if ( (spider_net_release_tx_chain(card, 0)) && - (card->netdev->flags & IFF_UP) ) { - mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER); - } -} - -/** - * 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_disable_rxdmac - disables the receive DMA controller - * @card: card structure - * - * spider_net_disable_rxdmac terminates processing on the DMA controller by - * turing off DMA and issueing a force end - */ -static void -spider_net_disable_rxdmac(struct spider_net_card *card) -{ - spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR, - SPIDER_NET_DMA_RX_FEND_VALUE); -} - -/** - * spider_net_stop - called upon ifconfig down - * @netdev: interface device structure - * - * always returns 0 - */ -int -spider_net_stop(struct net_device *netdev) -{ - struct spider_net_card *card = netdev_priv(netdev); - - tasklet_kill(&card->rxram_full_tl); - netif_poll_disable(netdev); - netif_carrier_off(netdev); - netif_stop_queue(netdev); - del_timer_sync(&card->tx_timer); - - /* disable/mask all interrupts */ - spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0); - spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0); - spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0); - - /* free_irq(netdev->irq, netdev);*/ - free_irq(to_pci_dev(netdev->class_dev.dev)->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_chain(card, &card->tx_chain); - spider_net_free_chain(card, &card->rx_chain); - - return 0; -} - -/** - * spider_net_get_next_tx_descr - returns the next available tx descriptor - * @card: device structure to get descriptor from - * - * returns the address of the next descriptor, or NULL if not available. - */ -static struct spider_net_descr * -spider_net_get_next_tx_descr(struct spider_net_card *card) -{ - /* check, if head points to not-in-use descr */ - if ( spider_net_get_descr_status(card->tx_chain.head) == - SPIDER_NET_DESCR_NOT_IN_USE ) { - return card->tx_chain.head; - } else { - return NULL; - } -} - -/** - * spider_net_set_txdescr_cmdstat - sets the tx descriptor command field - * @descr: descriptor structure to fill out - * @skb: packet to consider - * - * fills out the command and status field of the descriptor structure, - * depending on hardware checksum settings. - */ -static void -spider_net_set_txdescr_cmdstat(struct spider_net_descr *descr, - struct sk_buff *skb) -{ - /* make sure the other fields in the descriptor are written */ - wmb(); - - if (skb->ip_summed != CHECKSUM_HW) { - descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_NOCS; - return; - } - - /* is packet ip? - * if yes: tcp? udp? */ - if (skb->protocol == htons(ETH_P_IP)) { - if (skb->nh.iph->protocol == IPPROTO_TCP) - descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_TCPCS; - else if (skb->nh.iph->protocol == IPPROTO_UDP) - descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_UDPCS; - else /* the stack should checksum non-tcp and non-udp - packets on his own: NETIF_F_IP_CSUM */ - descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_NOCS; - } -} - -/** - * spider_net_prepare_tx_descr - fill tx descriptor with skb data - * @card: card structure - * @descr: descriptor structure to fill out - * @skb: packet to use - * - * returns 0 on success, <0 on failure. - * - * fills out the descriptor structure with skb data and len. Copies data, - * if needed (32bit DMA!) - */ -static int -spider_net_prepare_tx_descr(struct spider_net_card *card, - struct spider_net_descr *descr, - struct sk_buff *skb) -{ - dma_addr_t buf; - - buf = pci_map_single(card->pdev, skb->data, - skb->len, PCI_DMA_BIDIRECTIONAL); - if (buf == DMA_ERROR_CODE) { - if (netif_msg_tx_err(card) && net_ratelimit()) - pr_err("could not iommu-map packet (%p, %i). " - "Dropping packet\n", skb->data, skb->len); - return -ENOMEM; - } - - descr->buf_addr = buf; - descr->buf_size = skb->len; - descr->skb = skb; - descr->data_status = 0; - - spider_net_set_txdescr_cmdstat(descr,skb); - - return 0; -} - -/** - * spider_net_kick_tx_dma - enables TX DMA processing - * @card: card structure - * @descr: descriptor address to enable TX processing at - * - * spider_net_kick_tx_dma writes the current tx chain head as start address - * of the tx descriptor chain and enables the transmission DMA engine - */ -static void -spider_net_kick_tx_dma(struct spider_net_card *card, - struct spider_net_descr *descr) -{ - /* this is the only descriptor in the output chain. - * Enable TX DMA */ - - spider_net_write_reg(card, SPIDER_NET_GDTDCHA, - descr->bus_addr); - - spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR, - SPIDER_NET_DMA_TX_VALUE); -} - -/** - * spider_net_xmit - transmits a frame over the device - * @skb: packet to send out - * @netdev: interface device structure - * - * returns 0 on success, <0 on failure - */ -static int -spider_net_xmit(struct sk_buff *skb, struct net_device *netdev) -{ - struct spider_net_card *card = netdev_priv(netdev); - struct spider_net_descr *descr; - int result; - - spider_net_release_tx_chain(card, 0); - - descr = spider_net_get_next_tx_descr(card); - - if (!descr) - goto error; - - result = spider_net_prepare_tx_descr(card, descr, skb); - if (result) - goto error; - - card->tx_chain.head = card->tx_chain.head->next; - - if (spider_net_get_descr_status(descr->prev) != - SPIDER_NET_DESCR_CARDOWNED) { - /* make sure the current descriptor is in memory. Then - * kicking it on again makes sense, if the previous is not - * card-owned anymore. Check the previous descriptor twice - * to omit an mb() in heavy traffic cases */ - mb(); - if (spider_net_get_descr_status(descr->prev) != - SPIDER_NET_DESCR_CARDOWNED) - spider_net_kick_tx_dma(card, descr); - } - - mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER); - - return NETDEV_TX_OK; - -error: - card->netdev_stats.tx_dropped++; - return NETDEV_TX_BUSY; -} - -/** - * 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 - * @napi: whether caller is in NAPI context - * - * returns 1 on success, 0 if no packet was passed to the stack - * - * iommu-unmaps the skb, fills out skb structure and passes the data to the - * stack. The descriptor state is not changed. - */ -static int -spider_net_pass_skb_up(struct spider_net_descr *descr, - struct spider_net_card *card, int napi) -{ - struct sk_buff *skb; - struct net_device *netdev; - u32 data_status, data_error; - - data_status = descr->data_status; - data_error = descr->data_error; - - netdev = card->netdev; - - /* unmap descriptor */ - pci_unmap_single(card->pdev, descr->buf_addr, SPIDER_NET_MAX_FRAME, - PCI_DMA_BIDIRECTIONAL); - - /* the cases we'll throw away the packet immediately */ - if (data_error & SPIDER_NET_DESTROY_RX_FLAGS) { - if (netif_msg_rx_err(card)) - pr_err("error in received descriptor found, " - "data_status=x%08x, data_error=x%08x\n", - data_status, data_error); - return 0; - } - - skb = descr->skb; - skb->dev = netdev; - skb_put(skb, descr->valid_size); - - /* the card seems to add 2 bytes of junk in front - * of the ethernet frame */ -#define SPIDER_MISALIGN 2 - skb_pull(skb, SPIDER_MISALIGN); - skb->protocol = eth_type_trans(skb, netdev); - - /* checksum offload */ - if (card->options.rx_csum) { - if ( ( (data_status & SPIDER_NET_DATA_STATUS_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 - */ - } - - /* pass skb up to stack */ - if (napi) - netif_receive_skb(skb); - else - netif_rx_ni(skb); - - /* update netdevice statistics */ - card->netdev_stats.rx_packets++; - card->netdev_stats.rx_bytes += skb->len; - - return 1; -} - -/** - * spider_net_decode_one_descr - processes an rx descriptor - * @card: card structure - * @napi: whether caller is in NAPI context - * - * 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, int napi) -{ - enum spider_net_descr_status status; - struct spider_net_descr *descr; - struct spider_net_descr_chain *chain; - int result; - - chain = &card->rx_chain; - descr = chain->tail; - - status = spider_net_get_descr_status(descr); - - if (status == SPIDER_NET_DESCR_CARDOWNED) { - /* nothing in the descriptor yet */ - result=0; - goto out; - } - - if (status == SPIDER_NET_DESCR_NOT_IN_USE) { - /* not initialized yet, the ring must be empty */ - spider_net_refill_rx_chain(card); - spider_net_enable_rxdmac(card); - result=0; - goto out; - } - - /* descriptor definitively used -- move on tail */ - chain->tail = descr->next; - - result = 0; - if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) || - (status == SPIDER_NET_DESCR_PROTECTION_ERROR) || - (status == SPIDER_NET_DESCR_FORCE_END) ) { - if (netif_msg_rx_err(card)) - pr_err("%s: dropping RX descriptor with state %d\n", - card->netdev->name, status); - card->netdev_stats.rx_dropped++; - pci_unmap_single(card->pdev, descr->buf_addr, - SPIDER_NET_MAX_FRAME, PCI_DMA_BIDIRECTIONAL); - dev_kfree_skb_irq(descr->skb); - goto refill; - } - - if ( (status != SPIDER_NET_DESCR_COMPLETE) && - (status != SPIDER_NET_DESCR_FRAME_END) ) { - if (netif_msg_rx_err(card)) - pr_err("%s: RX descriptor with state %d\n", - card->netdev->name, status); - goto refill; - } - - /* ok, we've got a packet in descr */ - result = spider_net_pass_skb_up(descr, card, napi); -refill: - spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE); - /* change the descriptor state: */ - if (!napi) - spider_net_refill_rx_chain(card); -out: - return result; -} - -/** - * spider_net_poll - NAPI poll function called by the stack to return packets - * @netdev: interface device structure - * @budget: number of packets we can pass to the stack at most - * - * returns 0 if no more packets available to the driver/stack. Returns 1, - * if the quota is exceeded, but the driver has still packets. - * - * spider_net_poll returns all packets from the rx descriptors to the stack - * (using netif_receive_skb). If all/enough packets are up, the driver - * reenables interrupts and returns 0. If not, 1 is returned. - */ -static int -spider_net_poll(struct net_device *netdev, int *budget) -{ - struct spider_net_card *card = netdev_priv(netdev); - int packets_to_do, packets_done = 0; - int no_more_packets = 0; - - packets_to_do = min(*budget, netdev->quota); - - while (packets_to_do) { - if (spider_net_decode_one_descr(card, 1)) { - packets_done++; - packets_to_do--; - } else { - /* no more packets for the stack */ - no_more_packets = 1; - break; - } - } - - netdev->quota -= packets_done; - *budget -= packets_done; - spider_net_refill_rx_chain(card); - - /* if all packets are in the stack, enable interrupts and return 0 */ - /* if not, return 1 */ - if (no_more_packets) { - netif_rx_complete(netdev); - spider_net_rx_irq_on(card); - return 0; - } - - return 1; -} - -/** - * spider_net_vlan_rx_reg - initializes VLAN structures in the driver and card - * @netdev: interface device structure - * @grp: vlan_group structure that is registered (NULL on destroying interface) - */ -static void -spider_net_vlan_rx_reg(struct net_device *netdev, struct vlan_group *grp) -{ - /* further enhancement... yet to do */ - return; -} - -/** - * spider_net_vlan_rx_add - adds VLAN id to the card filter - * @netdev: interface device structure - * @vid: VLAN id to add - */ -static void -spider_net_vlan_rx_add(struct net_device *netdev, uint16_t vid) -{ - /* further enhancement... yet to do */ - /* add vid to card's VLAN filter table */ - return; -} - -/** - * spider_net_vlan_rx_kill - removes VLAN id to the card filter - * @netdev: interface device structure - * @vid: VLAN id to remove - */ -static void -spider_net_vlan_rx_kill(struct net_device *netdev, uint16_t vid) -{ - /* further enhancement... yet to do */ - /* remove vid from card's VLAN filter table */ -} - -/** - * spider_net_get_stats - get interface statistics - * @netdev: interface device structure - * - * returns the interface statistics residing in the spider_net_card struct - */ -static struct net_device_stats * -spider_net_get_stats(struct net_device *netdev) -{ - struct spider_net_card *card = netdev_priv(netdev); - struct net_device_stats *stats = &card->netdev_stats; - return stats; -} - -/** - * spider_net_change_mtu - changes the MTU of an interface - * @netdev: interface device structure - * @new_mtu: new MTU value - * - * returns 0 on success, <0 on failure - */ -static int -spider_net_change_mtu(struct net_device *netdev, int new_mtu) -{ - /* no need to re-alloc skbs or so -- the max mtu is about 2.3k - * and mtu is outbound only anyway */ - if ( (new_mtu < SPIDER_NET_MIN_MTU ) || - (new_mtu > SPIDER_NET_MAX_MTU) ) - return -EINVAL; - netdev->mtu = new_mtu; - return 0; -} - -/** - * spider_net_set_mac - sets the MAC of an interface - * @netdev: interface device structure - * @ptr: pointer to new MAC address - * - * Returns 0 on success, <0 on failure. Currently, we don't support this - * and will always return EOPNOTSUPP. - */ -static int -spider_net_set_mac(struct net_device *netdev, void *p) -{ - struct spider_net_card *card = netdev_priv(netdev); - u32 macl, macu, 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_enable_txdmac - enables a TX DMA controller - * @card: card structure - * - * spider_net_enable_txdmac enables the TX DMA controller by setting the - * descriptor chain tail address - */ -static void -spider_net_enable_txdmac(struct spider_net_card *card) -{ - /* assume chain is aligned correctly */ - spider_net_write_reg(card, SPIDER_NET_GDTDCHA, - card->tx_chain.tail->bus_addr); -} - -/** - * spider_net_handle_rxram_full - cleans up RX ring upon RX RAM full interrupt - * @card: card structure - * - * spider_net_handle_rxram_full empties the RX ring so that spider can put - * more packets in it and empty its RX RAM. This is called in bottom half - * context - */ -static void -spider_net_handle_rxram_full(struct spider_net_card *card) -{ - while (spider_net_decode_one_descr(card, 0)) - ; - spider_net_enable_rxchtails(card); - spider_net_enable_rxdmac(card); - netif_rx_schedule(card->netdev); -} - -/** - * spider_net_handle_error_irq - handles errors raised by an interrupt - * @card: card structure - * @status_reg: interrupt status register 0 (GHIINT0STS) - * - * spider_net_handle_error_irq treats or ignores all error conditions - * found when an interrupt is presented - */ -static void -spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg) -{ - u32 error_reg1, error_reg2; - u32 i; - int show_error = 1; - - error_reg1 = spider_net_read_reg(card, SPIDER_NET_GHIINT1STS); - error_reg2 = spider_net_read_reg(card, SPIDER_NET_GHIINT2STS); - - /* check GHIINT0STS ************************************/ - if (status_reg) - for (i = 0; i < 32; i++) - if (status_reg & (1<<i)) - switch (i) - { - /* let error_reg1 and error_reg2 evaluation decide, what to do - case SPIDER_NET_PHYINT: - case SPIDER_NET_GMAC2INT: - case SPIDER_NET_GMAC1INT: - case SPIDER_NET_GIPSINT: - case SPIDER_NET_GFIFOINT: - case SPIDER_NET_DMACINT: - case SPIDER_NET_GSYSINT: - break; */ - - case SPIDER_NET_GPWOPCMPINT: - /* PHY write operation completed */ - show_error = 0; - break; - case SPIDER_NET_GPROPCMPINT: - /* PHY read operation completed */ - /* we don't use semaphores, as we poll for the completion - * of the read operation in spider_net_read_phy. Should take - * about 50 us */ - show_error = 0; - break; - case SPIDER_NET_GPWFFINT: - /* PHY command queue full */ - if (netif_msg_intr(card)) - pr_err("PHY write queue full\n"); - show_error = 0; - break; - - /* case SPIDER_NET_GRMDADRINT: not used. print a message */ - /* case SPIDER_NET_GRMARPINT: not used. print a message */ - /* case SPIDER_NET_GRMMPINT: not used. print a message */ - - case SPIDER_NET_GDTDEN0INT: - /* someone has set TX_DMA_EN to 0 */ - show_error = 0; - break; - - case SPIDER_NET_GDDDEN0INT: /* fallthrough */ - case SPIDER_NET_GDCDEN0INT: /* fallthrough */ - case SPIDER_NET_GDBDEN0INT: /* fallthrough */ - case SPIDER_NET_GDADEN0INT: - /* someone has set RX_DMA_EN to 0 */ - show_error = 0; - break; - - /* RX interrupts */ - case SPIDER_NET_GDDFDCINT: - case SPIDER_NET_GDCFDCINT: - case SPIDER_NET_GDBFDCINT: - case SPIDER_NET_GDAFDCINT: - /* case SPIDER_NET_GDNMINT: not used. print a message */ - /* case SPIDER_NET_GCNMINT: not used. print a message */ - /* case SPIDER_NET_GBNMINT: not used. print a message */ - /* case SPIDER_NET_GANMINT: not used. print a message */ - /* case SPIDER_NET_GRFNMINT: not used. print a message */ - show_error = 0; - break; - - /* TX interrupts */ - case SPIDER_NET_GDTFDCINT: - show_error = 0; - break; - case SPIDER_NET_GTTEDINT: - show_error = 0; - break; - case SPIDER_NET_GDTDCEINT: - /* chain end. If a descriptor should be sent, kick off - * tx dma - if (card->tx_chain.tail == card->tx_chain.head) - spider_net_kick_tx_dma(card); - show_error = 0; */ - break; - - /* case SPIDER_NET_G1TMCNTINT: not used. print a message */ - /* case SPIDER_NET_GFREECNTINT: not used. print a message */ - } - - /* check GHIINT1STS ************************************/ - if (error_reg1) - for (i = 0; i < 32; i++) - if (error_reg1 & (1<<i)) - switch (i) - { - case SPIDER_NET_GTMFLLINT: - if (netif_msg_intr(card) && net_ratelimit()) - pr_err("Spider TX RAM full\n"); - 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: - if (netif_msg_intr(card) && net_ratelimit()) - pr_err("Spider RX RAM full, incoming packets " - "might be discarded!\n"); - spider_net_rx_irq_off(card); - tasklet_schedule(&card->rxram_full_tl); - 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: - if (netif_msg_intr(card)) - pr_err("got descriptor chain end interrupt, " - "restarting DMAC %c.\n", - 'D'+i-SPIDER_NET_GDDDCEINT); - spider_net_refill_rx_chain(card); - spider_net_enable_rxdmac(card); - show_error = 0; - break; - - /* invalid descriptor */ - case SPIDER_NET_GDDINVDINT: /* fallthrough */ - case SPIDER_NET_GDCINVDINT: /* fallthrough */ - case SPIDER_NET_GDBINVDINT: /* fallthrough */ - case SPIDER_NET_GDAINVDINT: - /* could happen when rx chain is full */ - spider_net_refill_rx_chain(card); - spider_net_enable_rxdmac(card); - show_error = 0; - break; - - /* case SPIDER_NET_GDTRSERINT: problem, print a message */ - /* case SPIDER_NET_GDDRSERINT: problem, print a message */ - /* case SPIDER_NET_GDCRSERINT: problem, print a message */ - /* case SPIDER_NET_GDBRSERINT: problem, print a message */ - /* case SPIDER_NET_GDARSERINT: problem, print a message */ - /* case SPIDER_NET_GDSERINT: problem, print a message */ - /* case SPIDER_NET_GDTPTERINT: problem, print a message */ - /* case SPIDER_NET_GDDPTERINT: problem, print a message */ - /* case SPIDER_NET_GDCPTERINT: problem, print a message */ - /* case SPIDER_NET_GDBPTERINT: problem, print a message */ - /* case SPIDER_NET_GDAPTERINT: problem, print a message */ - default: - show_error = 1; - break; - } - - /* check GHIINT2STS ************************************/ - if (error_reg2) - for (i = 0; i < 32; i++) - if (error_reg2 & (1<<i)) - switch (i) - { - /* there is nothing we can (want to) do at this time. Log a - * message, we can switch on and off the specific values later on - case SPIDER_NET_GPROPERINT: - case SPIDER_NET_GMCTCRSNGINT: - case SPIDER_NET_GMCTLCOLINT: - case SPIDER_NET_GMCTTMOTINT: - case SPIDER_NET_GMCRCAERINT: - case SPIDER_NET_GMCRCALERINT: - case SPIDER_NET_GMCRALNERINT: - case SPIDER_NET_GMCROVRINT: - case SPIDER_NET_GMCRRNTINT: - case SPIDER_NET_GMCRRXERINT: - case SPIDER_NET_GTITCSERINT: - case SPIDER_NET_GTIFMTERINT: - case SPIDER_NET_GTIPKTRVKINT: - case SPIDER_NET_GTISPINGINT: - case SPIDER_NET_GTISADNGINT: - case SPIDER_NET_GTISPDNGINT: - case SPIDER_NET_GRIFMTERINT: - case SPIDER_NET_GRIPKTRVKINT: - case SPIDER_NET_GRISPINGINT: - case SPIDER_NET_GRISADNGINT: - case SPIDER_NET_GRISPDNGINT: - break; - */ - default: - break; - } - - if ((show_error) && (netif_msg_intr(card))) - pr_err("Got error interrupt, GHIINT0STS = 0x%08x, " - "GHIINT1STS = 0x%08x, GHIINT2STS = 0x%08x\n", - status_reg, error_reg1, error_reg2); - - /* clear interrupt sources */ - spider_net_write_reg(card, SPIDER_NET_GHIINT1STS, error_reg1); - spider_net_write_reg(card, SPIDER_NET_GHIINT2STS, error_reg2); -} - -/** - * spider_net_interrupt - interrupt handler for spider_net - * @irq: interupt number - * @ptr: pointer to net_device - * @regs: PU registers - * - * returns IRQ_HANDLED, if interrupt was for driver, or IRQ_NONE, if no - * interrupt found raised by card. - * - * This is the interrupt handler, that turns off - * interrupts for this device and makes the stack poll the driver - */ -static irqreturn_t -spider_net_interrupt(int irq, void *ptr, struct pt_regs *regs) -{ - struct net_device *netdev = ptr; - struct spider_net_card *card = netdev_priv(netdev); - u32 status_reg; - - status_reg = spider_net_read_reg(card, SPIDER_NET_GHIINT0STS); - - if (!status_reg) - return IRQ_NONE; - - if (status_reg & SPIDER_NET_RXINT ) { - spider_net_rx_irq_off(card); - netif_rx_schedule(netdev); - } - - if (status_reg & SPIDER_NET_ERRINT ) - spider_net_handle_error_irq(card, status_reg); - - /* clear interrupt sources */ - spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg); - - return IRQ_HANDLED; -} - -#ifdef CONFIG_NET_POLL_CONTROLLER -/** - * spider_net_poll_controller - artificial interrupt for netconsole etc. - * @netdev: interface device structure - * - * see Documentation/networking/netconsole.txt - */ -static void -spider_net_poll_controller(struct net_device *netdev) -{ - disable_irq(netdev->irq); - spider_net_interrupt(netdev->irq, netdev, NULL); - enable_irq(netdev->irq); -} -#endif /* CONFIG_NET_POLL_CONTROLLER */ - -/** - * spider_net_init_card - initializes the card - * @card: card structure - * - * spider_net_init_card initializes the card so that other registers can - * be used - */ -static void -spider_net_init_card(struct spider_net_card *card) -{ - spider_net_write_reg(card, SPIDER_NET_CKRCTRL, - SPIDER_NET_CKRCTRL_STOP_VALUE); - - spider_net_write_reg(card, SPIDER_NET_CKRCTRL, - SPIDER_NET_CKRCTRL_RUN_VALUE); -} - -/** - * spider_net_enable_card - enables the card by setting all kinds of regs - * @card: card structure - * - * spider_net_enable_card sets a lot of SMMIO registers to enable the device - */ -static void -spider_net_enable_card(struct spider_net_card *card) -{ - int i; - /* the following array consists of (register),(value) pairs - * that are set in this function. A register of 0 ends the list */ - u32 regs[][2] = { - { SPIDER_NET_GRESUMINTNUM, 0 }, - { SPIDER_NET_GREINTNUM, 0 }, - - /* set interrupt frame number registers */ - /* clear the single DMA engine registers first */ - { SPIDER_NET_GFAFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, - { SPIDER_NET_GFBFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, - { SPIDER_NET_GFCFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, - { SPIDER_NET_GFDFRMNUM, SPIDER_NET_GFXFRAMES_VALUE }, - /* then set, what we really need */ - { SPIDER_NET_GFFRMNUM, SPIDER_NET_FRAMENUM_VALUE }, - - /* timer counter registers and stuff */ - { SPIDER_NET_GFREECNNUM, 0 }, - { SPIDER_NET_GONETIMENUM, 0 }, - { SPIDER_NET_GTOUTFRMNUM, 0 }, - - /* RX mode setting */ - { SPIDER_NET_GRXMDSET, SPIDER_NET_RXMODE_VALUE }, - /* TX mode setting */ - { SPIDER_NET_GTXMDSET, SPIDER_NET_TXMODE_VALUE }, - /* IPSEC mode setting */ - { SPIDER_NET_GIPSECINIT, SPIDER_NET_IPSECINIT_VALUE }, - - { SPIDER_NET_GFTRESTRT, SPIDER_NET_RESTART_VALUE }, - - { SPIDER_NET_GMRWOLCTRL, 0 }, - { SPIDER_NET_GTESTMD, 0 }, - - { SPIDER_NET_GMACINTEN, 0 }, - - /* flow control stuff */ - { SPIDER_NET_GMACAPAUSE, SPIDER_NET_MACAPAUSE_VALUE }, - { SPIDER_NET_GMACTXPAUSE, SPIDER_NET_TXPAUSE_VALUE }, - - { SPIDER_NET_GMACBSTLMT, SPIDER_NET_BURSTLMT_VALUE }, - { 0, 0} - }; - - i = 0; - while (regs[i][0]) { - spider_net_write_reg(card, regs[i][0], regs[i][1]); - i++; - } - - /* clear unicast filter table entries 1 to 14 */ - for (i = 1; i <= 14; i++) { - spider_net_write_reg(card, - SPIDER_NET_GMRUAFILnR + i * 8, - 0x00080000); - spider_net_write_reg(card, - SPIDER_NET_GMRUAFILnR + i * 8 + 4, - 0x00000000); - } - - spider_net_write_reg(card, SPIDER_NET_GMRUA0FIL15R, 0x08080000); - - spider_net_write_reg(card, SPIDER_NET_ECMODE, SPIDER_NET_ECMODE_VALUE); - - /* set chain tail adress for RX chains and - * enable DMA */ - spider_net_enable_rxchtails(card); - spider_net_enable_rxdmac(card); - - spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE); - - /* set chain tail adress for TX chain */ - spider_net_enable_txdmac(card); - - spider_net_write_reg(card, SPIDER_NET_GMACLENLMT, - SPIDER_NET_LENLMT_VALUE); - spider_net_write_reg(card, SPIDER_NET_GMACMODE, - SPIDER_NET_MACMODE_VALUE); - spider_net_write_reg(card, SPIDER_NET_GMACOPEMD, - SPIDER_NET_OPMODE_VALUE); - - /* set interrupt mask registers */ - spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, - SPIDER_NET_INT0_MASK_VALUE); - spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, - SPIDER_NET_INT1_MASK_VALUE); - spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, - SPIDER_NET_INT2_MASK_VALUE); -} - -/** - * spider_net_open - called upon ifonfig up - * @netdev: interface device structure - * - * returns 0 on success, <0 on failure - * - * spider_net_open allocates all the descriptors and memory needed for - * operation, sets up multicast list and enables interrupts - */ -int -spider_net_open(struct net_device *netdev) -{ - struct spider_net_card *card = netdev_priv(netdev); - int result; - - result = -ENOMEM; - if (spider_net_init_chain(card, &card->tx_chain, - card->descr, tx_descriptors)) - goto alloc_tx_failed; - if (spider_net_init_chain(card, &card->rx_chain, - card->descr + tx_descriptors, rx_descriptors)) - goto alloc_rx_failed; - - /* allocate rx skbs */ - if (spider_net_alloc_rx_skbs(card)) - goto alloc_skbs_failed; - - spider_net_set_multi(netdev); - - /* further enhancement: setup hw vlan, if needed */ - - result = -EBUSY; - if (request_irq(netdev->irq, spider_net_interrupt, - SA_SHIRQ, netdev->name, netdev)) - goto register_int_failed; - - spider_net_enable_card(card); - - netif_start_queue(netdev); - netif_carrier_on(netdev); - netif_poll_enable(netdev); - - return 0; - -register_int_failed: - spider_net_free_rx_chain_contents(card); -alloc_skbs_failed: - spider_net_free_chain(card, &card->rx_chain); -alloc_rx_failed: - spider_net_free_chain(card, &card->tx_chain); -alloc_tx_failed: - return result; -} - -/** - * spider_net_setup_phy - setup PHY - * @card: card structure - * - * returns 0 on success, <0 on failure - * - * spider_net_setup_phy is used as part of spider_net_probe. Sets - * the PHY to 1000 Mbps - **/ -static int -spider_net_setup_phy(struct spider_net_card *card) -{ - struct mii_phy *phy = &card->phy; - - spider_net_write_reg(card, SPIDER_NET_GDTDMASEL, - SPIDER_NET_DMASEL_VALUE); - spider_net_write_reg(card, SPIDER_NET_GPCCTRL, - SPIDER_NET_PHY_CTRL_VALUE); - phy->mii_id = 1; - phy->dev = card->netdev; - phy->mdio_read = spider_net_read_phy; - phy->mdio_write = spider_net_write_phy; - - mii_phy_probe(phy, phy->mii_id); - - if (phy->def->ops->setup_forced) - phy->def->ops->setup_forced(phy, SPEED_1000, DUPLEX_FULL); - - /* the following two writes could be moved to sungem_phy.c */ - /* enable fiber mode */ - spider_net_write_phy(card->netdev, 1, MII_NCONFIG, 0x9020); - /* LEDs active in both modes, autosense prio = fiber */ - spider_net_write_phy(card->netdev, 1, MII_NCONFIG, 0x945f); - - /* switch off fibre autoneg */ - spider_net_write_phy(card->netdev, 1, MII_NCONFIG, 0xfc01); - spider_net_write_phy(card->netdev, 1, 0x0b, 0x0004); - - phy->def->ops->read_link(phy); - pr_info("Found %s with %i Mbps, %s-duplex.\n", phy->def->name, - phy->speed, phy->duplex==1 ? "Full" : "Half"); - - return 0; -} - -/** - * spider_net_download_firmware - loads firmware into the adapter - * @card: card structure - * @firmware_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, - u8 *firmware_ptr) -{ - int sequencer, i; - u32 *fw_ptr = (u32 *)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; - 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) ) { - pr_err("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 = (u8 *)get_property(dn, "firmware", &fw_size); - if (!fw_prop) - goto out_err; - - if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) && - netif_msg_probe(card) ) { - pr_err("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)) - pr_err("Couldn't find spidernet firmware in filesystem " \ - "or host firmware\n"); - return err; -} - -/** - * spider_net_workaround_rxramfull - work around firmware bug - * @card: card structure - * - * no return value - **/ -static void -spider_net_workaround_rxramfull(struct spider_net_card *card) -{ - int i, sequencer = 0; - - /* cancel reset */ - spider_net_write_reg(card, SPIDER_NET_CKRCTRL, - SPIDER_NET_CKRCTRL_RUN_VALUE); - - /* empty sequencer data */ - for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS; - sequencer++) { - spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT + - 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_tx_timeout_task - task scheduled by the watchdog timeout - * function (to be called not under interrupt status) - * @data: data, is interface device structure - * - * called as task when tx hangs, resets interface (if interface is up) - */ -static void -spider_net_tx_timeout_task(void *data) -{ - struct net_device *netdev = data; - struct spider_net_card *card = netdev_priv(netdev); - - if (!(netdev->flags & IFF_UP)) - goto out; - - netif_device_detach(netdev); - spider_net_stop(netdev); - - spider_net_workaround_rxramfull(card); - spider_net_init_card(card); - - if (spider_net_setup_phy(card)) - goto out; - if (spider_net_init_firmware(card)) - goto out; - - spider_net_open(netdev); - spider_net_kick_tx_dma(card, card->tx_chain.head); - netif_device_attach(netdev); - -out: - atomic_dec(&card->tx_timeout_task_counter); -} - -/** - * spider_net_tx_timeout - called when the tx timeout watchdog kicks in. - * @netdev: interface device structure - * - * called, if tx hangs. Schedules a task that resets the interface - */ -static void -spider_net_tx_timeout(struct net_device *netdev) -{ - struct spider_net_card *card; - - card = netdev_priv(netdev); - atomic_inc(&card->tx_timeout_task_counter); - if (netdev->flags & IFF_UP) - schedule_work(&card->tx_timeout_task); - else - atomic_dec(&card->tx_timeout_task_counter); -} - -/** - * spider_net_setup_netdev_ops - initialization of net_device operations - * @netdev: net_device structure - * - * fills out function pointers in the net_device structure - */ -static void -spider_net_setup_netdev_ops(struct net_device *netdev) -{ - netdev->open = &spider_net_open; - netdev->stop = &spider_net_stop; - netdev->hard_start_xmit = &spider_net_xmit; - netdev->get_stats = &spider_net_get_stats; - netdev->set_multicast_list = &spider_net_set_multi; - netdev->set_mac_address = &spider_net_set_mac; - netdev->change_mtu = &spider_net_change_mtu; - netdev->do_ioctl = &spider_net_do_ioctl; - /* tx watchdog */ - netdev->tx_timeout = &spider_net_tx_timeout; - netdev->watchdog_timeo = SPIDER_NET_WATCHDOG_TIMEOUT; - /* NAPI */ - netdev->poll = &spider_net_poll; - netdev->weight = SPIDER_NET_NAPI_WEIGHT; - /* HW VLAN */ - netdev->vlan_rx_register = &spider_net_vlan_rx_reg; - netdev->vlan_rx_add_vid = &spider_net_vlan_rx_add; - netdev->vlan_rx_kill_vid = &spider_net_vlan_rx_kill; -#ifdef CONFIG_NET_POLL_CONTROLLER - /* poll controller */ - netdev->poll_controller = &spider_net_poll_controller; -#endif /* CONFIG_NET_POLL_CONTROLLER */ - /* ethtool ops */ - netdev->ethtool_ops = &spider_net_ethtool_ops; -} - -/** - * spider_net_setup_netdev - initialization of net_device - * @card: card structure - * - * Returns 0 on success or <0 on failure - * - * spider_net_setup_netdev initializes the net_device structure - **/ -static int -spider_net_setup_netdev(struct spider_net_card *card) -{ - int result; - struct net_device *netdev = card->netdev; - struct device_node *dn; - struct sockaddr addr; - u8 *mac; - - SET_MODULE_OWNER(netdev); - SET_NETDEV_DEV(netdev, &card->pdev->dev); - - pci_set_drvdata(card->pdev, netdev); - - atomic_set(&card->tx_chain_release,0); - card->rxram_full_tl.data = (unsigned long) card; - card->rxram_full_tl.func = - (void (*)(unsigned long)) spider_net_handle_rxram_full; - 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->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT; - - spider_net_setup_netdev_ops(netdev); - - netdev->features = 0; - /* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX | - * NETIF_F_HW_VLAN_FILTER */ - - netdev->irq = card->pdev->irq; - - dn = pci_device_to_OF_node(card->pdev); - if (!dn) - return -EIO; - - mac = (u8 *)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))) - pr_err("Failed to set MAC address: %i\n", result); - - result = register_netdev(netdev); - if (result) { - if (netif_msg_probe(card)) - pr_err("Couldn't register net_device: %i\n", - result); - return result; - } - - if (netif_msg_probe(card)) - pr_info("Initialized device %s.\n", netdev->name); - - return 0; -} - -/** - * spider_net_alloc_card - allocates net_device and card structure - * - * returns the card structure or NULL in case of errors - * - * the card and net_device structures are linked to each other - */ -static struct spider_net_card * -spider_net_alloc_card(void) -{ - struct net_device *netdev; - struct spider_net_card *card; - size_t alloc_size; - - alloc_size = sizeof (*card) + - sizeof (struct spider_net_descr) * rx_descriptors + - sizeof (struct spider_net_descr) * tx_descriptors; - netdev = alloc_etherdev(alloc_size); - if (!netdev) - return NULL; - - card = netdev_priv(netdev); - card->netdev = netdev; - card->msg_enable = SPIDER_NET_DEFAULT_MSG; - INIT_WORK(&card->tx_timeout_task, spider_net_tx_timeout_task, netdev); - init_waitqueue_head(&card->waitq); - atomic_set(&card->tx_timeout_task_counter, 0); - - return card; -} - -/** - * spider_net_undo_pci_setup - releases PCI ressources - * @card: card structure - * - * spider_net_undo_pci_setup releases the mapped regions - */ -static void -spider_net_undo_pci_setup(struct spider_net_card *card) -{ - iounmap(card->regs); - pci_release_regions(card->pdev); -} - -/** - * spider_net_setup_pci_dev - sets up the device in terms of PCI operations - * @card: card structure - * @pdev: PCI device - * - * Returns the card structure or NULL if any errors occur - * - * spider_net_setup_pci_dev initializes pdev and together with the - * functions called in spider_net_open configures the device so that - * data can be transferred over it - * The net_device structure is attached to the card structure, if the - * function returns without error. - **/ -static struct spider_net_card * -spider_net_setup_pci_dev(struct pci_dev *pdev) -{ - struct spider_net_card *card; - unsigned long mmio_start, mmio_len; - - if (pci_enable_device(pdev)) { - pr_err("Couldn't enable PCI device\n"); - return NULL; - } - - if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { - pr_err("Couldn't find proper PCI device base address.\n"); - goto out_disable_dev; - } - - if (pci_request_regions(pdev, spider_net_driver_name)) { - pr_err("Couldn't obtain PCI resources, aborting.\n"); - goto out_disable_dev; - } - - pci_set_master(pdev); - - card = spider_net_alloc_card(); - if (!card) { - pr_err("Couldn't allocate net_device structure, " - "aborting.\n"); - goto out_release_regions; - } - card->pdev = pdev; - - /* fetch base address and length of first resource */ - mmio_start = pci_resource_start(pdev, 0); - mmio_len = pci_resource_len(pdev, 0); - - card->netdev->mem_start = mmio_start; - card->netdev->mem_end = mmio_start + mmio_len; - card->regs = ioremap(mmio_start, mmio_len); - - if (!card->regs) { - pr_err("Couldn't obtain PCI resources, aborting.\n"); - goto out_release_regions; - } - - return card; - -out_release_regions: - pci_release_regions(pdev); -out_disable_dev: - pci_disable_device(pdev); - pci_set_drvdata(pdev, NULL); - return NULL; -} - -/** - * spider_net_probe - initialization of a device - * @pdev: PCI device - * @ent: entry in the device id list - * - * Returns 0 on success, <0 on failure - * - * spider_net_probe initializes pdev and registers a net_device - * structure for it. After that, the device can be ifconfig'ed up - **/ -static int __devinit -spider_net_probe(struct pci_dev *pdev, const struct pci_device_id *ent) -{ - int err = -EIO; - struct spider_net_card *card; - - card = spider_net_setup_pci_dev(pdev); - if (!card) - goto out; - - spider_net_workaround_rxramfull(card); - spider_net_init_card(card); - - err = spider_net_setup_phy(card); - if (err) - goto out_undo_pci; - - err = spider_net_init_firmware(card); - if (err) - goto out_undo_pci; - - err = spider_net_setup_netdev(card); - if (err) - goto out_undo_pci; - - return 0; - -out_undo_pci: - spider_net_undo_pci_setup(card); - free_netdev(card->netdev); -out: - return err; -} - -/** - * spider_net_remove - removal of a device - * @pdev: PCI device - * - * Returns 0 on success, <0 on failure - * - * spider_net_remove is called to remove the device and unregisters the - * net_device - **/ -static void __devexit -spider_net_remove(struct pci_dev *pdev) -{ - struct net_device *netdev; - struct spider_net_card *card; - - netdev = pci_get_drvdata(pdev); - card = netdev_priv(netdev); - - wait_event(card->waitq, - atomic_read(&card->tx_timeout_task_counter) == 0); - - unregister_netdev(netdev); - - /* 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) -{ - 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); |