From: Jeff Kirsher Date: Sat, 13 Aug 2011 07:37:14 +0000 (-0700) Subject: acenic: Move the Alteon driver X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=531c4f896ca380812c22841e8ae396428a3327bf;p=openwrt%2Fstaging%2Fblogic.git acenic: Move the Alteon driver Based on feedback from Alan Cox, the acenic driver moved to drivers/net/ethernet/alteon/ and made the necessary Kconfig and Makefile changes. CC: Jes Sorensen CC: Alan Cox Signed-off-by: Jeff Kirsher --- diff --git a/MAINTAINERS b/MAINTAINERS index 3d8a6a6d660c..d374c6f9d05e 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -213,7 +213,7 @@ ACENIC DRIVER M: Jes Sorensen L: linux-acenic@sunsite.dk S: Maintained -F: drivers/net/ethernet/3com/acenic* +F: drivers/net/ethernet/alteon/acenic* ACER ASPIRE ONE TEMPERATURE AND FAN DRIVER M: Peter Feuerer diff --git a/drivers/net/ethernet/3com/Kconfig b/drivers/net/ethernet/3com/Kconfig index 497f038dcd47..65cc129da114 100644 --- a/drivers/net/ethernet/3com/Kconfig +++ b/drivers/net/ethernet/3com/Kconfig @@ -117,31 +117,4 @@ config TYPHOON To compile this driver as a module, choose M here. The module will be called typhoon. -config ACENIC - tristate "Alteon AceNIC/3Com 3C985/NetGear GA620 Gigabit support" - depends on PCI - ---help--- - Say Y here if you have an Alteon AceNIC, 3Com 3C985(B), NetGear - GA620, SGI Gigabit or Farallon PN9000-SX PCI Gigabit Ethernet - adapter. The driver allows for using the Jumbo Frame option (9000 - bytes/frame) however it requires that your switches can handle this - as well. To enable Jumbo Frames, add `mtu 9000' to your ifconfig - line. - - To compile this driver as a module, choose M here: the - module will be called acenic. - -config ACENIC_OMIT_TIGON_I - bool "Omit support for old Tigon I based AceNICs" - depends on ACENIC - ---help--- - Say Y here if you only have Tigon II based AceNICs and want to leave - out support for the older Tigon I based cards which are no longer - being sold (ie. the original Alteon AceNIC and 3Com 3C985 (non B - version)). This will reduce the size of the driver object by - app. 100KB. If you are not sure whether your card is a Tigon I or a - Tigon II, say N here. - - The safe and default value for this is N. - endif # NET_VENDOR_3COM diff --git a/drivers/net/ethernet/3com/Makefile b/drivers/net/ethernet/3com/Makefile index 96d1d60d67b6..1e5382a30ead 100644 --- a/drivers/net/ethernet/3com/Makefile +++ b/drivers/net/ethernet/3com/Makefile @@ -8,5 +8,4 @@ obj-$(CONFIG_3C515) += 3c515.o obj-$(CONFIG_PCMCIA_3C589) += 3c589_cs.o obj-$(CONFIG_PCMCIA_3C574) += 3c574_cs.o obj-$(CONFIG_VORTEX) += 3c59x.o -obj-$(CONFIG_ACENIC) += acenic.o obj-$(CONFIG_TYPHOON) += typhoon.o diff --git a/drivers/net/ethernet/3com/acenic.c b/drivers/net/ethernet/3com/acenic.c deleted file mode 100644 index 31798f5f5d06..000000000000 --- a/drivers/net/ethernet/3com/acenic.c +++ /dev/null @@ -1,3206 +0,0 @@ -/* - * acenic.c: Linux driver for the Alteon AceNIC Gigabit Ethernet card - * and other Tigon based cards. - * - * Copyright 1998-2002 by Jes Sorensen, . - * - * Thanks to Alteon and 3Com for providing hardware and documentation - * enabling me to write this driver. - * - * A mailing list for discussing the use of this driver has been - * setup, please subscribe to the lists if you have any questions - * about the driver. Send mail to linux-acenic-help@sunsite.auc.dk to - * see how to subscribe. - * - * 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 of the License, or - * (at your option) any later version. - * - * Additional credits: - * Pete Wyckoff : Initial Linux/Alpha and trace - * dump support. The trace dump support has not been - * integrated yet however. - * Troy Benjegerdes: Big Endian (PPC) patches. - * Nate Stahl: Better out of memory handling and stats support. - * Aman Singla: Nasty race between interrupt handler and tx code dealing - * with 'testing the tx_ret_csm and setting tx_full' - * David S. Miller : conversion to new PCI dma mapping - * infrastructure and Sparc support - * Pierrick Pinasseau (CERN): For lending me an Ultra 5 to test the - * driver under Linux/Sparc64 - * Matt Domsch : Detect Alteon 1000baseT cards - * ETHTOOL_GDRVINFO support - * Chip Salzenberg : Fix race condition between tx - * handler and close() cleanup. - * Ken Aaker : Correct check for whether - * memory mapped IO is enabled to - * make the driver work on RS/6000. - * Takayoshi Kouchi : Identifying problem - * where the driver would disable - * bus master mode if it had to disable - * write and invalidate. - * Stephen Hack : Fixed ace_set_mac_addr for little - * endian systems. - * Val Henson : Reset Jumbo skb producer and - * rx producer index when - * flushing the Jumbo ring. - * Hans Grobler : Memory leak fixes in the - * driver init path. - * Grant Grundler : PCI write posting fixes. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#ifdef SIOCETHTOOL -#include -#endif - -#include -#include - -#include -#include -#include -#include -#include - - -#define DRV_NAME "acenic" - -#undef INDEX_DEBUG - -#ifdef CONFIG_ACENIC_OMIT_TIGON_I -#define ACE_IS_TIGON_I(ap) 0 -#define ACE_TX_RING_ENTRIES(ap) MAX_TX_RING_ENTRIES -#else -#define ACE_IS_TIGON_I(ap) (ap->version == 1) -#define ACE_TX_RING_ENTRIES(ap) ap->tx_ring_entries -#endif - -#ifndef PCI_VENDOR_ID_ALTEON -#define PCI_VENDOR_ID_ALTEON 0x12ae -#endif -#ifndef PCI_DEVICE_ID_ALTEON_ACENIC_FIBRE -#define PCI_DEVICE_ID_ALTEON_ACENIC_FIBRE 0x0001 -#define PCI_DEVICE_ID_ALTEON_ACENIC_COPPER 0x0002 -#endif -#ifndef PCI_DEVICE_ID_3COM_3C985 -#define PCI_DEVICE_ID_3COM_3C985 0x0001 -#endif -#ifndef PCI_VENDOR_ID_NETGEAR -#define PCI_VENDOR_ID_NETGEAR 0x1385 -#define PCI_DEVICE_ID_NETGEAR_GA620 0x620a -#endif -#ifndef PCI_DEVICE_ID_NETGEAR_GA620T -#define PCI_DEVICE_ID_NETGEAR_GA620T 0x630a -#endif - - -/* - * Farallon used the DEC vendor ID by mistake and they seem not - * to care - stinky! - */ -#ifndef PCI_DEVICE_ID_FARALLON_PN9000SX -#define PCI_DEVICE_ID_FARALLON_PN9000SX 0x1a -#endif -#ifndef PCI_DEVICE_ID_FARALLON_PN9100T -#define PCI_DEVICE_ID_FARALLON_PN9100T 0xfa -#endif -#ifndef PCI_VENDOR_ID_SGI -#define PCI_VENDOR_ID_SGI 0x10a9 -#endif -#ifndef PCI_DEVICE_ID_SGI_ACENIC -#define PCI_DEVICE_ID_SGI_ACENIC 0x0009 -#endif - -static DEFINE_PCI_DEVICE_TABLE(acenic_pci_tbl) = { - { PCI_VENDOR_ID_ALTEON, PCI_DEVICE_ID_ALTEON_ACENIC_FIBRE, - PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, - { PCI_VENDOR_ID_ALTEON, PCI_DEVICE_ID_ALTEON_ACENIC_COPPER, - PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, - { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3C985, - PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, - { PCI_VENDOR_ID_NETGEAR, PCI_DEVICE_ID_NETGEAR_GA620, - PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, - { PCI_VENDOR_ID_NETGEAR, PCI_DEVICE_ID_NETGEAR_GA620T, - PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, - /* - * Farallon used the DEC vendor ID on their cards incorrectly, - * then later Alteon's ID. - */ - { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_FARALLON_PN9000SX, - PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, - { PCI_VENDOR_ID_ALTEON, PCI_DEVICE_ID_FARALLON_PN9100T, - PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, - { PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_ACENIC, - PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, - { } -}; -MODULE_DEVICE_TABLE(pci, acenic_pci_tbl); - -#define ace_sync_irq(irq) synchronize_irq(irq) - -#ifndef offset_in_page -#define offset_in_page(ptr) ((unsigned long)(ptr) & ~PAGE_MASK) -#endif - -#define ACE_MAX_MOD_PARMS 8 -#define BOARD_IDX_STATIC 0 -#define BOARD_IDX_OVERFLOW -1 - -#include "acenic.h" - -/* - * These must be defined before the firmware is included. - */ -#define MAX_TEXT_LEN 96*1024 -#define MAX_RODATA_LEN 8*1024 -#define MAX_DATA_LEN 2*1024 - -#ifndef tigon2FwReleaseLocal -#define tigon2FwReleaseLocal 0 -#endif - -/* - * This driver currently supports Tigon I and Tigon II based cards - * including the Alteon AceNIC, the 3Com 3C985[B] and NetGear - * GA620. The driver should also work on the SGI, DEC and Farallon - * versions of the card, however I have not been able to test that - * myself. - * - * This card is really neat, it supports receive hardware checksumming - * and jumbo frames (up to 9000 bytes) and does a lot of work in the - * firmware. Also the programming interface is quite neat, except for - * the parts dealing with the i2c eeprom on the card ;-) - * - * Using jumbo frames: - * - * To enable jumbo frames, simply specify an mtu between 1500 and 9000 - * bytes to ifconfig. Jumbo frames can be enabled or disabled at any time - * by running `ifconfig eth mtu ' with being the Ethernet - * interface number and being the MTU value. - * - * Module parameters: - * - * When compiled as a loadable module, the driver allows for a number - * of module parameters to be specified. The driver supports the - * following module parameters: - * - * trace= - Firmware trace level. This requires special traced - * firmware to replace the firmware supplied with - * the driver - for debugging purposes only. - * - * link= - Link state. Normally you want to use the default link - * parameters set by the driver. This can be used to - * override these in case your switch doesn't negotiate - * the link properly. Valid values are: - * 0x0001 - Force half duplex link. - * 0x0002 - Do not negotiate line speed with the other end. - * 0x0010 - 10Mbit/sec link. - * 0x0020 - 100Mbit/sec link. - * 0x0040 - 1000Mbit/sec link. - * 0x0100 - Do not negotiate flow control. - * 0x0200 - Enable RX flow control Y - * 0x0400 - Enable TX flow control Y (Tigon II NICs only). - * Default value is 0x0270, ie. enable link+flow - * control negotiation. Negotiating the highest - * possible link speed with RX flow control enabled. - * - * When disabling link speed negotiation, only one link - * speed is allowed to be specified! - * - * tx_coal_tick= - number of coalescing clock ticks (us) allowed - * to wait for more packets to arive before - * interrupting the host, from the time the first - * packet arrives. - * - * rx_coal_tick= - number of coalescing clock ticks (us) allowed - * to wait for more packets to arive in the transmit ring, - * before interrupting the host, after transmitting the - * first packet in the ring. - * - * max_tx_desc= - maximum number of transmit descriptors - * (packets) transmitted before interrupting the host. - * - * max_rx_desc= - maximum number of receive descriptors - * (packets) received before interrupting the host. - * - * tx_ratio= - 7 bit value (0 - 63) specifying the split in 64th - * increments of the NIC's on board memory to be used for - * transmit and receive buffers. For the 1MB NIC app. 800KB - * is available, on the 1/2MB NIC app. 300KB is available. - * 68KB will always be available as a minimum for both - * directions. The default value is a 50/50 split. - * dis_pci_mem_inval= - disable PCI memory write and invalidate - * operations, default (1) is to always disable this as - * that is what Alteon does on NT. I have not been able - * to measure any real performance differences with - * this on my systems. Set =0 if you want to - * enable these operations. - * - * If you use more than one NIC, specify the parameters for the - * individual NICs with a comma, ie. trace=0,0x00001fff,0 you want to - * run tracing on NIC #2 but not on NIC #1 and #3. - * - * TODO: - * - * - Proper multicast support. - * - NIC dump support. - * - More tuning parameters. - * - * The mini ring is not used under Linux and I am not sure it makes sense - * to actually use it. - * - * New interrupt handler strategy: - * - * The old interrupt handler worked using the traditional method of - * replacing an skbuff with a new one when a packet arrives. However - * the rx rings do not need to contain a static number of buffer - * descriptors, thus it makes sense to move the memory allocation out - * of the main interrupt handler and do it in a bottom half handler - * and only allocate new buffers when the number of buffers in the - * ring is below a certain threshold. In order to avoid starving the - * NIC under heavy load it is however necessary to force allocation - * when hitting a minimum threshold. The strategy for alloction is as - * follows: - * - * RX_LOW_BUF_THRES - allocate buffers in the bottom half - * RX_PANIC_LOW_THRES - we are very low on buffers, allocate - * the buffers in the interrupt handler - * RX_RING_THRES - maximum number of buffers in the rx ring - * RX_MINI_THRES - maximum number of buffers in the mini ring - * RX_JUMBO_THRES - maximum number of buffers in the jumbo ring - * - * One advantagous side effect of this allocation approach is that the - * entire rx processing can be done without holding any spin lock - * since the rx rings and registers are totally independent of the tx - * ring and its registers. This of course includes the kmalloc's of - * new skb's. Thus start_xmit can run in parallel with rx processing - * and the memory allocation on SMP systems. - * - * Note that running the skb reallocation in a bottom half opens up - * another can of races which needs to be handled properly. In - * particular it can happen that the interrupt handler tries to run - * the reallocation while the bottom half is either running on another - * CPU or was interrupted on the same CPU. To get around this the - * driver uses bitops to prevent the reallocation routines from being - * reentered. - * - * TX handling can also be done without holding any spin lock, wheee - * this is fun! since tx_ret_csm is only written to by the interrupt - * handler. The case to be aware of is when shutting down the device - * and cleaning up where it is necessary to make sure that - * start_xmit() is not running while this is happening. Well DaveM - * informs me that this case is already protected against ... bye bye - * Mr. Spin Lock, it was nice to know you. - * - * TX interrupts are now partly disabled so the NIC will only generate - * TX interrupts for the number of coal ticks, not for the number of - * TX packets in the queue. This should reduce the number of TX only, - * ie. when no RX processing is done, interrupts seen. - */ - -/* - * Threshold values for RX buffer allocation - the low water marks for - * when to start refilling the rings are set to 75% of the ring - * sizes. It seems to make sense to refill the rings entirely from the - * intrrupt handler once it gets below the panic threshold, that way - * we don't risk that the refilling is moved to another CPU when the - * one running the interrupt handler just got the slab code hot in its - * cache. - */ -#define RX_RING_SIZE 72 -#define RX_MINI_SIZE 64 -#define RX_JUMBO_SIZE 48 - -#define RX_PANIC_STD_THRES 16 -#define RX_PANIC_STD_REFILL (3*RX_PANIC_STD_THRES)/2 -#define RX_LOW_STD_THRES (3*RX_RING_SIZE)/4 -#define RX_PANIC_MINI_THRES 12 -#define RX_PANIC_MINI_REFILL (3*RX_PANIC_MINI_THRES)/2 -#define RX_LOW_MINI_THRES (3*RX_MINI_SIZE)/4 -#define RX_PANIC_JUMBO_THRES 6 -#define RX_PANIC_JUMBO_REFILL (3*RX_PANIC_JUMBO_THRES)/2 -#define RX_LOW_JUMBO_THRES (3*RX_JUMBO_SIZE)/4 - - -/* - * Size of the mini ring entries, basically these just should be big - * enough to take TCP ACKs - */ -#define ACE_MINI_SIZE 100 - -#define ACE_MINI_BUFSIZE ACE_MINI_SIZE -#define ACE_STD_BUFSIZE (ACE_STD_MTU + ETH_HLEN + 4) -#define ACE_JUMBO_BUFSIZE (ACE_JUMBO_MTU + ETH_HLEN + 4) - -/* - * There seems to be a magic difference in the effect between 995 and 996 - * but little difference between 900 and 995 ... no idea why. - * - * There is now a default set of tuning parameters which is set, depending - * on whether or not the user enables Jumbo frames. It's assumed that if - * Jumbo frames are enabled, the user wants optimal tuning for that case. - */ -#define DEF_TX_COAL 400 /* 996 */ -#define DEF_TX_MAX_DESC 60 /* was 40 */ -#define DEF_RX_COAL 120 /* 1000 */ -#define DEF_RX_MAX_DESC 25 -#define DEF_TX_RATIO 21 /* 24 */ - -#define DEF_JUMBO_TX_COAL 20 -#define DEF_JUMBO_TX_MAX_DESC 60 -#define DEF_JUMBO_RX_COAL 30 -#define DEF_JUMBO_RX_MAX_DESC 6 -#define DEF_JUMBO_TX_RATIO 21 - -#if tigon2FwReleaseLocal < 20001118 -/* - * Standard firmware and early modifications duplicate - * IRQ load without this flag (coal timer is never reset). - * Note that with this flag tx_coal should be less than - * time to xmit full tx ring. - * 400usec is not so bad for tx ring size of 128. - */ -#define TX_COAL_INTS_ONLY 1 /* worth it */ -#else -/* - * With modified firmware, this is not necessary, but still useful. - */ -#define TX_COAL_INTS_ONLY 1 -#endif - -#define DEF_TRACE 0 -#define DEF_STAT (2 * TICKS_PER_SEC) - - -static int link_state[ACE_MAX_MOD_PARMS]; -static int trace[ACE_MAX_MOD_PARMS]; -static int tx_coal_tick[ACE_MAX_MOD_PARMS]; -static int rx_coal_tick[ACE_MAX_MOD_PARMS]; -static int max_tx_desc[ACE_MAX_MOD_PARMS]; -static int max_rx_desc[ACE_MAX_MOD_PARMS]; -static int tx_ratio[ACE_MAX_MOD_PARMS]; -static int dis_pci_mem_inval[ACE_MAX_MOD_PARMS] = {1, 1, 1, 1, 1, 1, 1, 1}; - -MODULE_AUTHOR("Jes Sorensen "); -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("AceNIC/3C985/GA620 Gigabit Ethernet driver"); -#ifndef CONFIG_ACENIC_OMIT_TIGON_I -MODULE_FIRMWARE("acenic/tg1.bin"); -#endif -MODULE_FIRMWARE("acenic/tg2.bin"); - -module_param_array_named(link, link_state, int, NULL, 0); -module_param_array(trace, int, NULL, 0); -module_param_array(tx_coal_tick, int, NULL, 0); -module_param_array(max_tx_desc, int, NULL, 0); -module_param_array(rx_coal_tick, int, NULL, 0); -module_param_array(max_rx_desc, int, NULL, 0); -module_param_array(tx_ratio, int, NULL, 0); -MODULE_PARM_DESC(link, "AceNIC/3C985/NetGear link state"); -MODULE_PARM_DESC(trace, "AceNIC/3C985/NetGear firmware trace level"); -MODULE_PARM_DESC(tx_coal_tick, "AceNIC/3C985/GA620 max clock ticks to wait from first tx descriptor arrives"); -MODULE_PARM_DESC(max_tx_desc, "AceNIC/3C985/GA620 max number of transmit descriptors to wait"); -MODULE_PARM_DESC(rx_coal_tick, "AceNIC/3C985/GA620 max clock ticks to wait from first rx descriptor arrives"); -MODULE_PARM_DESC(max_rx_desc, "AceNIC/3C985/GA620 max number of receive descriptors to wait"); -MODULE_PARM_DESC(tx_ratio, "AceNIC/3C985/GA620 ratio of NIC memory used for TX/RX descriptors (range 0-63)"); - - -static const char version[] __devinitconst = - "acenic.c: v0.92 08/05/2002 Jes Sorensen, linux-acenic@SunSITE.dk\n" - " http://home.cern.ch/~jes/gige/acenic.html\n"; - -static int ace_get_settings(struct net_device *, struct ethtool_cmd *); -static int ace_set_settings(struct net_device *, struct ethtool_cmd *); -static void ace_get_drvinfo(struct net_device *, struct ethtool_drvinfo *); - -static const struct ethtool_ops ace_ethtool_ops = { - .get_settings = ace_get_settings, - .set_settings = ace_set_settings, - .get_drvinfo = ace_get_drvinfo, -}; - -static void ace_watchdog(struct net_device *dev); - -static const struct net_device_ops ace_netdev_ops = { - .ndo_open = ace_open, - .ndo_stop = ace_close, - .ndo_tx_timeout = ace_watchdog, - .ndo_get_stats = ace_get_stats, - .ndo_start_xmit = ace_start_xmit, - .ndo_set_multicast_list = ace_set_multicast_list, - .ndo_validate_addr = eth_validate_addr, - .ndo_set_mac_address = ace_set_mac_addr, - .ndo_change_mtu = ace_change_mtu, -}; - -static int __devinit acenic_probe_one(struct pci_dev *pdev, - const struct pci_device_id *id) -{ - struct net_device *dev; - struct ace_private *ap; - static int boards_found; - - dev = alloc_etherdev(sizeof(struct ace_private)); - if (dev == NULL) { - printk(KERN_ERR "acenic: Unable to allocate " - "net_device structure!\n"); - return -ENOMEM; - } - - SET_NETDEV_DEV(dev, &pdev->dev); - - ap = netdev_priv(dev); - ap->pdev = pdev; - ap->name = pci_name(pdev); - - dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM; - dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX; - - dev->watchdog_timeo = 5*HZ; - - dev->netdev_ops = &ace_netdev_ops; - SET_ETHTOOL_OPS(dev, &ace_ethtool_ops); - - /* we only display this string ONCE */ - if (!boards_found) - printk(version); - - if (pci_enable_device(pdev)) - goto fail_free_netdev; - - /* - * Enable master mode before we start playing with the - * pci_command word since pci_set_master() will modify - * it. - */ - pci_set_master(pdev); - - pci_read_config_word(pdev, PCI_COMMAND, &ap->pci_command); - - /* OpenFirmware on Mac's does not set this - DOH.. */ - if (!(ap->pci_command & PCI_COMMAND_MEMORY)) { - printk(KERN_INFO "%s: Enabling PCI Memory Mapped " - "access - was not enabled by BIOS/Firmware\n", - ap->name); - ap->pci_command = ap->pci_command | PCI_COMMAND_MEMORY; - pci_write_config_word(ap->pdev, PCI_COMMAND, - ap->pci_command); - wmb(); - } - - pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &ap->pci_latency); - if (ap->pci_latency <= 0x40) { - ap->pci_latency = 0x40; - pci_write_config_byte(pdev, PCI_LATENCY_TIMER, ap->pci_latency); - } - - /* - * Remap the regs into kernel space - this is abuse of - * dev->base_addr since it was means for I/O port - * addresses but who gives a damn. - */ - dev->base_addr = pci_resource_start(pdev, 0); - ap->regs = ioremap(dev->base_addr, 0x4000); - if (!ap->regs) { - printk(KERN_ERR "%s: Unable to map I/O register, " - "AceNIC %i will be disabled.\n", - ap->name, boards_found); - goto fail_free_netdev; - } - - switch(pdev->vendor) { - case PCI_VENDOR_ID_ALTEON: - if (pdev->device == PCI_DEVICE_ID_FARALLON_PN9100T) { - printk(KERN_INFO "%s: Farallon PN9100-T ", - ap->name); - } else { - printk(KERN_INFO "%s: Alteon AceNIC ", - ap->name); - } - break; - case PCI_VENDOR_ID_3COM: - printk(KERN_INFO "%s: 3Com 3C985 ", ap->name); - break; - case PCI_VENDOR_ID_NETGEAR: - printk(KERN_INFO "%s: NetGear GA620 ", ap->name); - break; - case PCI_VENDOR_ID_DEC: - if (pdev->device == PCI_DEVICE_ID_FARALLON_PN9000SX) { - printk(KERN_INFO "%s: Farallon PN9000-SX ", - ap->name); - break; - } - case PCI_VENDOR_ID_SGI: - printk(KERN_INFO "%s: SGI AceNIC ", ap->name); - break; - default: - printk(KERN_INFO "%s: Unknown AceNIC ", ap->name); - break; - } - - printk("Gigabit Ethernet at 0x%08lx, ", dev->base_addr); - printk("irq %d\n", pdev->irq); - -#ifdef CONFIG_ACENIC_OMIT_TIGON_I - if ((readl(&ap->regs->HostCtrl) >> 28) == 4) { - printk(KERN_ERR "%s: Driver compiled without Tigon I" - " support - NIC disabled\n", dev->name); - goto fail_uninit; - } -#endif - - if (ace_allocate_descriptors(dev)) - goto fail_free_netdev; - -#ifdef MODULE - if (boards_found >= ACE_MAX_MOD_PARMS) - ap->board_idx = BOARD_IDX_OVERFLOW; - else - ap->board_idx = boards_found; -#else - ap->board_idx = BOARD_IDX_STATIC; -#endif - - if (ace_init(dev)) - goto fail_free_netdev; - - if (register_netdev(dev)) { - printk(KERN_ERR "acenic: device registration failed\n"); - goto fail_uninit; - } - ap->name = dev->name; - - if (ap->pci_using_dac) - dev->features |= NETIF_F_HIGHDMA; - - pci_set_drvdata(pdev, dev); - - boards_found++; - return 0; - - fail_uninit: - ace_init_cleanup(dev); - fail_free_netdev: - free_netdev(dev); - return -ENODEV; -} - -static void __devexit acenic_remove_one(struct pci_dev *pdev) -{ - struct net_device *dev = pci_get_drvdata(pdev); - struct ace_private *ap = netdev_priv(dev); - struct ace_regs __iomem *regs = ap->regs; - short i; - - unregister_netdev(dev); - - writel(readl(®s->CpuCtrl) | CPU_HALT, ®s->CpuCtrl); - if (ap->version >= 2) - writel(readl(®s->CpuBCtrl) | CPU_HALT, ®s->CpuBCtrl); - - /* - * This clears any pending interrupts - */ - writel(1, ®s->Mb0Lo); - readl(®s->CpuCtrl); /* flush */ - - /* - * Make sure no other CPUs are processing interrupts - * on the card before the buffers are being released. - * Otherwise one might experience some `interesting' - * effects. - * - * Then release the RX buffers - jumbo buffers were - * already released in ace_close(). - */ - ace_sync_irq(dev->irq); - - for (i = 0; i < RX_STD_RING_ENTRIES; i++) { - struct sk_buff *skb = ap->skb->rx_std_skbuff[i].skb; - - if (skb) { - struct ring_info *ringp; - dma_addr_t mapping; - - ringp = &ap->skb->rx_std_skbuff[i]; - mapping = dma_unmap_addr(ringp, mapping); - pci_unmap_page(ap->pdev, mapping, - ACE_STD_BUFSIZE, - PCI_DMA_FROMDEVICE); - - ap->rx_std_ring[i].size = 0; - ap->skb->rx_std_skbuff[i].skb = NULL; - dev_kfree_skb(skb); - } - } - - if (ap->version >= 2) { - for (i = 0; i < RX_MINI_RING_ENTRIES; i++) { - struct sk_buff *skb = ap->skb->rx_mini_skbuff[i].skb; - - if (skb) { - struct ring_info *ringp; - dma_addr_t mapping; - - ringp = &ap->skb->rx_mini_skbuff[i]; - mapping = dma_unmap_addr(ringp,mapping); - pci_unmap_page(ap->pdev, mapping, - ACE_MINI_BUFSIZE, - PCI_DMA_FROMDEVICE); - - ap->rx_mini_ring[i].size = 0; - ap->skb->rx_mini_skbuff[i].skb = NULL; - dev_kfree_skb(skb); - } - } - } - - for (i = 0; i < RX_JUMBO_RING_ENTRIES; i++) { - struct sk_buff *skb = ap->skb->rx_jumbo_skbuff[i].skb; - if (skb) { - struct ring_info *ringp; - dma_addr_t mapping; - - ringp = &ap->skb->rx_jumbo_skbuff[i]; - mapping = dma_unmap_addr(ringp, mapping); - pci_unmap_page(ap->pdev, mapping, - ACE_JUMBO_BUFSIZE, - PCI_DMA_FROMDEVICE); - - ap->rx_jumbo_ring[i].size = 0; - ap->skb->rx_jumbo_skbuff[i].skb = NULL; - dev_kfree_skb(skb); - } - } - - ace_init_cleanup(dev); - free_netdev(dev); -} - -static struct pci_driver acenic_pci_driver = { - .name = "acenic", - .id_table = acenic_pci_tbl, - .probe = acenic_probe_one, - .remove = __devexit_p(acenic_remove_one), -}; - -static int __init acenic_init(void) -{ - return pci_register_driver(&acenic_pci_driver); -} - -static void __exit acenic_exit(void) -{ - pci_unregister_driver(&acenic_pci_driver); -} - -module_init(acenic_init); -module_exit(acenic_exit); - -static void ace_free_descriptors(struct net_device *dev) -{ - struct ace_private *ap = netdev_priv(dev); - int size; - - if (ap->rx_std_ring != NULL) { - size = (sizeof(struct rx_desc) * - (RX_STD_RING_ENTRIES + - RX_JUMBO_RING_ENTRIES + - RX_MINI_RING_ENTRIES + - RX_RETURN_RING_ENTRIES)); - pci_free_consistent(ap->pdev, size, ap->rx_std_ring, - ap->rx_ring_base_dma); - ap->rx_std_ring = NULL; - ap->rx_jumbo_ring = NULL; - ap->rx_mini_ring = NULL; - ap->rx_return_ring = NULL; - } - if (ap->evt_ring != NULL) { - size = (sizeof(struct event) * EVT_RING_ENTRIES); - pci_free_consistent(ap->pdev, size, ap->evt_ring, - ap->evt_ring_dma); - ap->evt_ring = NULL; - } - if (ap->tx_ring != NULL && !ACE_IS_TIGON_I(ap)) { - size = (sizeof(struct tx_desc) * MAX_TX_RING_ENTRIES); - pci_free_consistent(ap->pdev, size, ap->tx_ring, - ap->tx_ring_dma); - } - ap->tx_ring = NULL; - - if (ap->evt_prd != NULL) { - pci_free_consistent(ap->pdev, sizeof(u32), - (void *)ap->evt_prd, ap->evt_prd_dma); - ap->evt_prd = NULL; - } - if (ap->rx_ret_prd != NULL) { - pci_free_consistent(ap->pdev, sizeof(u32), - (void *)ap->rx_ret_prd, - ap->rx_ret_prd_dma); - ap->rx_ret_prd = NULL; - } - if (ap->tx_csm != NULL) { - pci_free_consistent(ap->pdev, sizeof(u32), - (void *)ap->tx_csm, ap->tx_csm_dma); - ap->tx_csm = NULL; - } -} - - -static int ace_allocate_descriptors(struct net_device *dev) -{ - struct ace_private *ap = netdev_priv(dev); - int size; - - size = (sizeof(struct rx_desc) * - (RX_STD_RING_ENTRIES + - RX_JUMBO_RING_ENTRIES + - RX_MINI_RING_ENTRIES + - RX_RETURN_RING_ENTRIES)); - - ap->rx_std_ring = pci_alloc_consistent(ap->pdev, size, - &ap->rx_ring_base_dma); - if (ap->rx_std_ring == NULL) - goto fail; - - ap->rx_jumbo_ring = ap->rx_std_ring + RX_STD_RING_ENTRIES; - ap->rx_mini_ring = ap->rx_jumbo_ring + RX_JUMBO_RING_ENTRIES; - ap->rx_return_ring = ap->rx_mini_ring + RX_MINI_RING_ENTRIES; - - size = (sizeof(struct event) * EVT_RING_ENTRIES); - - ap->evt_ring = pci_alloc_consistent(ap->pdev, size, &ap->evt_ring_dma); - - if (ap->evt_ring == NULL) - goto fail; - - /* - * Only allocate a host TX ring for the Tigon II, the Tigon I - * has to use PCI registers for this ;-( - */ - if (!ACE_IS_TIGON_I(ap)) { - size = (sizeof(struct tx_desc) * MAX_TX_RING_ENTRIES); - - ap->tx_ring = pci_alloc_consistent(ap->pdev, size, - &ap->tx_ring_dma); - - if (ap->tx_ring == NULL) - goto fail; - } - - ap->evt_prd = pci_alloc_consistent(ap->pdev, sizeof(u32), - &ap->evt_prd_dma); - if (ap->evt_prd == NULL) - goto fail; - - ap->rx_ret_prd = pci_alloc_consistent(ap->pdev, sizeof(u32), - &ap->rx_ret_prd_dma); - if (ap->rx_ret_prd == NULL) - goto fail; - - ap->tx_csm = pci_alloc_consistent(ap->pdev, sizeof(u32), - &ap->tx_csm_dma); - if (ap->tx_csm == NULL) - goto fail; - - return 0; - -fail: - /* Clean up. */ - ace_init_cleanup(dev); - return 1; -} - - -/* - * Generic cleanup handling data allocated during init. Used when the - * module is unloaded or if an error occurs during initialization - */ -static void ace_init_cleanup(struct net_device *dev) -{ - struct ace_private *ap; - - ap = netdev_priv(dev); - - ace_free_descriptors(dev); - - if (ap->info) - pci_free_consistent(ap->pdev, sizeof(struct ace_info), - ap->info, ap->info_dma); - kfree(ap->skb); - kfree(ap->trace_buf); - - if (dev->irq) - free_irq(dev->irq, dev); - - iounmap(ap->regs); -} - - -/* - * Commands are considered to be slow. - */ -static inline void ace_issue_cmd(struct ace_regs __iomem *regs, struct cmd *cmd) -{ - u32 idx; - - idx = readl(®s->CmdPrd); - - writel(*(u32 *)(cmd), ®s->CmdRng[idx]); - idx = (idx + 1) % CMD_RING_ENTRIES; - - writel(idx, ®s->CmdPrd); -} - - -static int __devinit ace_init(struct net_device *dev) -{ - struct ace_private *ap; - struct ace_regs __iomem *regs; - struct ace_info *info = NULL; - struct pci_dev *pdev; - unsigned long myjif; - u64 tmp_ptr; - u32 tig_ver, mac1, mac2, tmp, pci_state; - int board_idx, ecode = 0; - short i; - unsigned char cache_size; - - ap = netdev_priv(dev); - regs = ap->regs; - - board_idx = ap->board_idx; - - /* - * aman@sgi.com - its useful to do a NIC reset here to - * address the `Firmware not running' problem subsequent - * to any crashes involving the NIC - */ - writel(HW_RESET | (HW_RESET << 24), ®s->HostCtrl); - readl(®s->HostCtrl); /* PCI write posting */ - udelay(5); - - /* - * Don't access any other registers before this point! - */ -#ifdef __BIG_ENDIAN - /* - * This will most likely need BYTE_SWAP once we switch - * to using __raw_writel() - */ - writel((WORD_SWAP | CLR_INT | ((WORD_SWAP | CLR_INT) << 24)), - ®s->HostCtrl); -#else - writel((CLR_INT | WORD_SWAP | ((CLR_INT | WORD_SWAP) << 24)), - ®s->HostCtrl); -#endif - readl(®s->HostCtrl); /* PCI write posting */ - - /* - * Stop the NIC CPU and clear pending interrupts - */ - writel(readl(®s->CpuCtrl) | CPU_HALT, ®s->CpuCtrl); - readl(®s->CpuCtrl); /* PCI write posting */ - writel(0, ®s->Mb0Lo); - - tig_ver = readl(®s->HostCtrl) >> 28; - - switch(tig_ver){ -#ifndef CONFIG_ACENIC_OMIT_TIGON_I - case 4: - case 5: - printk(KERN_INFO " Tigon I (Rev. %i), Firmware: %i.%i.%i, ", - tig_ver, ap->firmware_major, ap->firmware_minor, - ap->firmware_fix); - writel(0, ®s->LocalCtrl); - ap->version = 1; - ap->tx_ring_entries = TIGON_I_TX_RING_ENTRIES; - break; -#endif - case 6: - printk(KERN_INFO " Tigon II (Rev. %i), Firmware: %i.%i.%i, ", - tig_ver, ap->firmware_major, ap->firmware_minor, - ap->firmware_fix); - writel(readl(®s->CpuBCtrl) | CPU_HALT, ®s->CpuBCtrl); - readl(®s->CpuBCtrl); /* PCI write posting */ - /* - * The SRAM bank size does _not_ indicate the amount - * of memory on the card, it controls the _bank_ size! - * Ie. a 1MB AceNIC will have two banks of 512KB. - */ - writel(SRAM_BANK_512K, ®s->LocalCtrl); - writel(SYNC_SRAM_TIMING, ®s->MiscCfg); - ap->version = 2; - ap->tx_ring_entries = MAX_TX_RING_ENTRIES; - break; - default: - printk(KERN_WARNING " Unsupported Tigon version detected " - "(%i)\n", tig_ver); - ecode = -ENODEV; - goto init_error; - } - - /* - * ModeStat _must_ be set after the SRAM settings as this change - * seems to corrupt the ModeStat and possible other registers. - * The SRAM settings survive resets and setting it to the same - * value a second time works as well. This is what caused the - * `Firmware not running' problem on the Tigon II. - */ -#ifdef __BIG_ENDIAN - writel(ACE_BYTE_SWAP_DMA | ACE_WARN | ACE_FATAL | ACE_BYTE_SWAP_BD | - ACE_WORD_SWAP_BD | ACE_NO_JUMBO_FRAG, ®s->ModeStat); -#else - writel(ACE_BYTE_SWAP_DMA | ACE_WARN | ACE_FATAL | - ACE_WORD_SWAP_BD | ACE_NO_JUMBO_FRAG, ®s->ModeStat); -#endif - readl(®s->ModeStat); /* PCI write posting */ - - mac1 = 0; - for(i = 0; i < 4; i++) { - int t; - - mac1 = mac1 << 8; - t = read_eeprom_byte(dev, 0x8c+i); - if (t < 0) { - ecode = -EIO; - goto init_error; - } else - mac1 |= (t & 0xff); - } - mac2 = 0; - for(i = 4; i < 8; i++) { - int t; - - mac2 = mac2 << 8; - t = read_eeprom_byte(dev, 0x8c+i); - if (t < 0) { - ecode = -EIO; - goto init_error; - } else - mac2 |= (t & 0xff); - } - - writel(mac1, ®s->MacAddrHi); - writel(mac2, ®s->MacAddrLo); - - dev->dev_addr[0] = (mac1 >> 8) & 0xff; - dev->dev_addr[1] = mac1 & 0xff; - dev->dev_addr[2] = (mac2 >> 24) & 0xff; - dev->dev_addr[3] = (mac2 >> 16) & 0xff; - dev->dev_addr[4] = (mac2 >> 8) & 0xff; - dev->dev_addr[5] = mac2 & 0xff; - - printk("MAC: %pM\n", dev->dev_addr); - - /* - * Looks like this is necessary to deal with on all architectures, - * even this %$#%$# N440BX Intel based thing doesn't get it right. - * Ie. having two NICs in the machine, one will have the cache - * line set at boot time, the other will not. - */ - pdev = ap->pdev; - pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_size); - cache_size <<= 2; - if (cache_size != SMP_CACHE_BYTES) { - printk(KERN_INFO " PCI cache line size set incorrectly " - "(%i bytes) by BIOS/FW, ", cache_size); - if (cache_size > SMP_CACHE_BYTES) - printk("expecting %i\n", SMP_CACHE_BYTES); - else { - printk("correcting to %i\n", SMP_CACHE_BYTES); - pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, - SMP_CACHE_BYTES >> 2); - } - } - - pci_state = readl(®s->PciState); - printk(KERN_INFO " PCI bus width: %i bits, speed: %iMHz, " - "latency: %i clks\n", - (pci_state & PCI_32BIT) ? 32 : 64, - (pci_state & PCI_66MHZ) ? 66 : 33, - ap->pci_latency); - - /* - * Set the max DMA transfer size. Seems that for most systems - * the performance is better when no MAX parameter is - * set. However for systems enabling PCI write and invalidate, - * DMA writes must be set to the L1 cache line size to get - * optimal performance. - * - * The default is now to turn the PCI write and invalidate off - * - that is what Alteon does for NT. - */ - tmp = READ_CMD_MEM | WRITE_CMD_MEM; - if (ap->version >= 2) { - tmp |= (MEM_READ_MULTIPLE | (pci_state & PCI_66MHZ)); - /* - * Tuning parameters only supported for 8 cards - */ - if (board_idx == BOARD_IDX_OVERFLOW || - dis_pci_mem_inval[board_idx]) { - if (ap->pci_command & PCI_COMMAND_INVALIDATE) { - ap->pci_command &= ~PCI_COMMAND_INVALIDATE; - pci_write_config_word(pdev, PCI_COMMAND, - ap->pci_command); - printk(KERN_INFO " Disabling PCI memory " - "write and invalidate\n"); - } - } else if (ap->pci_command & PCI_COMMAND_INVALIDATE) { - printk(KERN_INFO " PCI memory write & invalidate " - "enabled by BIOS, enabling counter measures\n"); - - switch(SMP_CACHE_BYTES) { - case 16: - tmp |= DMA_WRITE_MAX_16; - break; - case 32: - tmp |= DMA_WRITE_MAX_32; - break; - case 64: - tmp |= DMA_WRITE_MAX_64; - break; - case 128: - tmp |= DMA_WRITE_MAX_128; - break; - default: - printk(KERN_INFO " Cache line size %i not " - "supported, PCI write and invalidate " - "disabled\n", SMP_CACHE_BYTES); - ap->pci_command &= ~PCI_COMMAND_INVALIDATE; - pci_write_config_word(pdev, PCI_COMMAND, - ap->pci_command); - } - } - } - -#ifdef __sparc__ - /* - * On this platform, we know what the best dma settings - * are. We use 64-byte maximum bursts, because if we - * burst larger than the cache line size (or even cross - * a 64byte boundary in a single burst) the UltraSparc - * PCI controller will disconnect at 64-byte multiples. - * - * Read-multiple will be properly enabled above, and when - * set will give the PCI controller proper hints about - * prefetching. - */ - tmp &= ~DMA_READ_WRITE_MASK; - tmp |= DMA_READ_MAX_64; - tmp |= DMA_WRITE_MAX_64; -#endif -#ifdef __alpha__ - tmp &= ~DMA_READ_WRITE_MASK; - tmp |= DMA_READ_MAX_128; - /* - * All the docs say MUST NOT. Well, I did. - * Nothing terrible happens, if we load wrong size. - * Bit w&i still works better! - */ - tmp |= DMA_WRITE_MAX_128; -#endif - writel(tmp, ®s->PciState); - -#if 0 - /* - * The Host PCI bus controller driver has to set FBB. - * If all devices on that PCI bus support FBB, then the controller - * can enable FBB support in the Host PCI Bus controller (or on - * the PCI-PCI bridge if that applies). - * -ggg - */ - /* - * I have received reports from people having problems when this - * bit is enabled. - */ - if (!(ap->pci_command & PCI_COMMAND_FAST_BACK)) { - printk(KERN_INFO " Enabling PCI Fast Back to Back\n"); - ap->pci_command |= PCI_COMMAND_FAST_BACK; - pci_write_config_word(pdev, PCI_COMMAND, ap->pci_command); - } -#endif - - /* - * Configure DMA attributes. - */ - if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) { - ap->pci_using_dac = 1; - } else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) { - ap->pci_using_dac = 0; - } else { - ecode = -ENODEV; - goto init_error; - } - - /* - * Initialize the generic info block and the command+event rings - * and the control blocks for the transmit and receive rings - * as they need to be setup once and for all. - */ - if (!(info = pci_alloc_consistent(ap->pdev, sizeof(struct ace_info), - &ap->info_dma))) { - ecode = -EAGAIN; - goto init_error; - } - ap->info = info; - - /* - * Get the memory for the skb rings. - */ - if (!(ap->skb = kmalloc(sizeof(struct ace_skb), GFP_KERNEL))) { - ecode = -EAGAIN; - goto init_error; - } - - ecode = request_irq(pdev->irq, ace_interrupt, IRQF_SHARED, - DRV_NAME, dev); - if (ecode) { - printk(KERN_WARNING "%s: Requested IRQ %d is busy\n", - DRV_NAME, pdev->irq); - goto init_error; - } else - dev->irq = pdev->irq; - -#ifdef INDEX_DEBUG - spin_lock_init(&ap->debug_lock); - ap->last_tx = ACE_TX_RING_ENTRIES(ap) - 1; - ap->last_std_rx = 0; - ap->last_mini_rx = 0; -#endif - - memset(ap->info, 0, sizeof(struct ace_info)); - memset(ap->skb, 0, sizeof(struct ace_skb)); - - ecode = ace_load_firmware(dev); - if (ecode) - goto init_error; - - ap->fw_running = 0; - - tmp_ptr = ap->info_dma; - writel(tmp_ptr >> 32, ®s->InfoPtrHi); - writel(tmp_ptr & 0xffffffff, ®s->InfoPtrLo); - - memset(ap->evt_ring, 0, EVT_RING_ENTRIES * sizeof(struct event)); - - set_aceaddr(&info->evt_ctrl.rngptr, ap->evt_ring_dma); - info->evt_ctrl.flags = 0; - - *(ap->evt_prd) = 0; - wmb(); - set_aceaddr(&info->evt_prd_ptr, ap->evt_prd_dma); - writel(0, ®s->EvtCsm); - - set_aceaddr(&info->cmd_ctrl.rngptr, 0x100); - info->cmd_ctrl.flags = 0; - info->cmd_ctrl.max_len = 0; - - for (i = 0; i < CMD_RING_ENTRIES; i++) - writel(0, ®s->CmdRng[i]); - - writel(0, ®s->CmdPrd); - writel(0, ®s->CmdCsm); - - tmp_ptr = ap->info_dma; - tmp_ptr += (unsigned long) &(((struct ace_info *)0)->s.stats); - set_aceaddr(&info->stats2_ptr, (dma_addr_t) tmp_ptr); - - set_aceaddr(&info->rx_std_ctrl.rngptr, ap->rx_ring_base_dma); - info->rx_std_ctrl.max_len = ACE_STD_BUFSIZE; - info->rx_std_ctrl.flags = - RCB_FLG_TCP_UDP_SUM | RCB_FLG_NO_PSEUDO_HDR | RCB_FLG_VLAN_ASSIST; - - memset(ap->rx_std_ring, 0, - RX_STD_RING_ENTRIES * sizeof(struct rx_desc)); - - for (i = 0; i < RX_STD_RING_ENTRIES; i++) - ap->rx_std_ring[i].flags = BD_FLG_TCP_UDP_SUM; - - ap->rx_std_skbprd = 0; - atomic_set(&ap->cur_rx_bufs, 0); - - set_aceaddr(&info->rx_jumbo_ctrl.rngptr, - (ap->rx_ring_base_dma + - (sizeof(struct rx_desc) * RX_STD_RING_ENTRIES))); - info->rx_jumbo_ctrl.max_len = 0; - info->rx_jumbo_ctrl.flags = - RCB_FLG_TCP_UDP_SUM | RCB_FLG_NO_PSEUDO_HDR | RCB_FLG_VLAN_ASSIST; - - memset(ap->rx_jumbo_ring, 0, - RX_JUMBO_RING_ENTRIES * sizeof(struct rx_desc)); - - for (i = 0; i < RX_JUMBO_RING_ENTRIES; i++) - ap->rx_jumbo_ring[i].flags = BD_FLG_TCP_UDP_SUM | BD_FLG_JUMBO; - - ap->rx_jumbo_skbprd = 0; - atomic_set(&ap->cur_jumbo_bufs, 0); - - memset(ap->rx_mini_ring, 0, - RX_MINI_RING_ENTRIES * sizeof(struct rx_desc)); - - if (ap->version >= 2) { - set_aceaddr(&info->rx_mini_ctrl.rngptr, - (ap->rx_ring_base_dma + - (sizeof(struct rx_desc) * - (RX_STD_RING_ENTRIES + - RX_JUMBO_RING_ENTRIES)))); - info->rx_mini_ctrl.max_len = ACE_MINI_SIZE; - info->rx_mini_ctrl.flags = - RCB_FLG_TCP_UDP_SUM|RCB_FLG_NO_PSEUDO_HDR|RCB_FLG_VLAN_ASSIST; - - for (i = 0; i < RX_MINI_RING_ENTRIES; i++) - ap->rx_mini_ring[i].flags = - BD_FLG_TCP_UDP_SUM | BD_FLG_MINI; - } else { - set_aceaddr(&info->rx_mini_ctrl.rngptr, 0); - info->rx_mini_ctrl.flags = RCB_FLG_RNG_DISABLE; - info->rx_mini_ctrl.max_len = 0; - } - - ap->rx_mini_skbprd = 0; - atomic_set(&ap->cur_mini_bufs, 0); - - set_aceaddr(&info->rx_return_ctrl.rngptr, - (ap->rx_ring_base_dma + - (sizeof(struct rx_desc) * - (RX_STD_RING_ENTRIES + - RX_JUMBO_RING_ENTRIES + - RX_MINI_RING_ENTRIES)))); - info->rx_return_ctrl.flags = 0; - info->rx_return_ctrl.max_len = RX_RETURN_RING_ENTRIES; - - memset(ap->rx_return_ring, 0, - RX_RETURN_RING_ENTRIES * sizeof(struct rx_desc)); - - set_aceaddr(&info->rx_ret_prd_ptr, ap->rx_ret_prd_dma); - *(ap->rx_ret_prd) = 0; - - writel(TX_RING_BASE, ®s->WinBase); - - if (ACE_IS_TIGON_I(ap)) { - ap->tx_ring = (__force struct tx_desc *) regs->Window; - for (i = 0; i < (TIGON_I_TX_RING_ENTRIES - * sizeof(struct tx_desc)) / sizeof(u32); i++) - writel(0, (__force void __iomem *)ap->tx_ring + i * 4); - - set_aceaddr(&info->tx_ctrl.rngptr, TX_RING_BASE); - } else { - memset(ap->tx_ring, 0, - MAX_TX_RING_ENTRIES * sizeof(struct tx_desc)); - - set_aceaddr(&info->tx_ctrl.rngptr, ap->tx_ring_dma); - } - - info->tx_ctrl.max_len = ACE_TX_RING_ENTRIES(ap); - tmp = RCB_FLG_TCP_UDP_SUM | RCB_FLG_NO_PSEUDO_HDR | RCB_FLG_VLAN_ASSIST; - - /* - * The Tigon I does not like having the TX ring in host memory ;-( - */ - if (!ACE_IS_TIGON_I(ap)) - tmp |= RCB_FLG_TX_HOST_RING; -#if TX_COAL_INTS_ONLY - tmp |= RCB_FLG_COAL_INT_ONLY; -#endif - info->tx_ctrl.flags = tmp; - - set_aceaddr(&info->tx_csm_ptr, ap->tx_csm_dma); - - /* - * Potential item for tuning parameter - */ -#if 0 /* NO */ - writel(DMA_THRESH_16W, ®s->DmaReadCfg); - writel(DMA_THRESH_16W, ®s->DmaWriteCfg); -#else - writel(DMA_THRESH_8W, ®s->DmaReadCfg); - writel(DMA_THRESH_8W, ®s->DmaWriteCfg); -#endif - - writel(0, ®s->MaskInt); - writel(1, ®s->IfIdx); -#if 0 - /* - * McKinley boxes do not like us fiddling with AssistState - * this early - */ - writel(1, ®s->AssistState); -#endif - - writel(DEF_STAT, ®s->TuneStatTicks); - writel(DEF_TRACE, ®s->TuneTrace); - - ace_set_rxtx_parms(dev, 0); - - if (board_idx == BOARD_IDX_OVERFLOW) { - printk(KERN_WARNING "%s: more than %i NICs detected, " - "ignoring module parameters!\n", - ap->name, ACE_MAX_MOD_PARMS); - } else if (board_idx >= 0) { - if (tx_coal_tick[board_idx]) - writel(tx_coal_tick[board_idx], - ®s->TuneTxCoalTicks); - if (max_tx_desc[board_idx]) - writel(max_tx_desc[board_idx], ®s->TuneMaxTxDesc); - - if (rx_coal_tick[board_idx]) - writel(rx_coal_tick[board_idx], - ®s->TuneRxCoalTicks); - if (max_rx_desc[board_idx]) - writel(max_rx_desc[board_idx], ®s->TuneMaxRxDesc); - - if (trace[board_idx]) - writel(trace[board_idx], ®s->TuneTrace); - - if ((tx_ratio[board_idx] > 0) && (tx_ratio[board_idx] < 64)) - writel(tx_ratio[board_idx], ®s->TxBufRat); - } - - /* - * Default link parameters - */ - tmp = LNK_ENABLE | LNK_FULL_DUPLEX | LNK_1000MB | LNK_100MB | - LNK_10MB | LNK_RX_FLOW_CTL_Y | LNK_NEG_FCTL | LNK_NEGOTIATE; - if(ap->version >= 2) - tmp |= LNK_TX_FLOW_CTL_Y; - - /* - * Override link default parameters - */ - if ((board_idx >= 0) && link_state[board_idx]) { - int option = link_state[board_idx]; - - tmp = LNK_ENABLE; - - if (option & 0x01) { - printk(KERN_INFO "%s: Setting half duplex link\n", - ap->name); - tmp &= ~LNK_FULL_DUPLEX; - } - if (option & 0x02) - tmp &= ~LNK_NEGOTIATE; - if (option & 0x10) - tmp |= LNK_10MB; - if (option & 0x20) - tmp |= LNK_100MB; - if (option & 0x40) - tmp |= LNK_1000MB; - if ((option & 0x70) == 0) { - printk(KERN_WARNING "%s: No media speed specified, " - "forcing auto negotiation\n", ap->name); - tmp |= LNK_NEGOTIATE | LNK_1000MB | - LNK_100MB | LNK_10MB; - } - if ((option & 0x100) == 0) - tmp |= LNK_NEG_FCTL; - else - printk(KERN_INFO "%s: Disabling flow control " - "negotiation\n", ap->name); - if (option & 0x200) - tmp |= LNK_RX_FLOW_CTL_Y; - if ((option & 0x400) && (ap->version >= 2)) { - printk(KERN_INFO "%s: Enabling TX flow control\n", - ap->name); - tmp |= LNK_TX_FLOW_CTL_Y; - } - } - - ap->link = tmp; - writel(tmp, ®s->TuneLink); - if (ap->version >= 2) - writel(tmp, ®s->TuneFastLink); - - writel(ap->firmware_start, ®s->Pc); - - writel(0, ®s->Mb0Lo); - - /* - * Set tx_csm before we start receiving interrupts, otherwise - * the interrupt handler might think it is supposed to process - * tx ints before we are up and running, which may cause a null - * pointer access in the int handler. - */ - ap->cur_rx = 0; - ap->tx_prd = *(ap->tx_csm) = ap->tx_ret_csm = 0; - - wmb(); - ace_set_txprd(regs, ap, 0); - writel(0, ®s->RxRetCsm); - - /* - * Enable DMA engine now. - * If we do this sooner, Mckinley box pukes. - * I assume it's because Tigon II DMA engine wants to check - * *something* even before the CPU is started. - */ - writel(1, ®s->AssistState); /* enable DMA */ - - /* - * Start the NIC CPU - */ - writel(readl(®s->CpuCtrl) & ~(CPU_HALT|CPU_TRACE), ®s->CpuCtrl); - readl(®s->CpuCtrl); - - /* - * Wait for the firmware to spin up - max 3 seconds. - */ - myjif = jiffies + 3 * HZ; - while (time_before(jiffies, myjif) && !ap->fw_running) - cpu_relax(); - - if (!ap->fw_running) { - printk(KERN_ERR "%s: Firmware NOT running!\n", ap->name); - - ace_dump_trace(ap); - writel(readl(®s->CpuCtrl) | CPU_HALT, ®s->CpuCtrl); - readl(®s->CpuCtrl); - - /* aman@sgi.com - account for badly behaving firmware/NIC: - * - have observed that the NIC may continue to generate - * interrupts for some reason; attempt to stop it - halt - * second CPU for Tigon II cards, and also clear Mb0 - * - if we're a module, we'll fail to load if this was - * the only GbE card in the system => if the kernel does - * see an interrupt from the NIC, code to handle it is - * gone and OOps! - so free_irq also - */ - if (ap->version >= 2) - writel(readl(®s->CpuBCtrl) | CPU_HALT, - ®s->CpuBCtrl); - writel(0, ®s->Mb0Lo); - readl(®s->Mb0Lo); - - ecode = -EBUSY; - goto init_error; - } - - /* - * We load the ring here as there seem to be no way to tell the - * firmware to wipe the ring without re-initializing it. - */ - if (!test_and_set_bit(0, &ap->std_refill_busy)) - ace_load_std_rx_ring(dev, RX_RING_SIZE); - else - printk(KERN_ERR "%s: Someone is busy refilling the RX ring\n", - ap->name); - if (ap->version >= 2) { - if (!test_and_set_bit(0, &ap->mini_refill_busy)) - ace_load_mini_rx_ring(dev, RX_MINI_SIZE); - else - printk(KERN_ERR "%s: Someone is busy refilling " - "the RX mini ring\n", ap->name); - } - return 0; - - init_error: - ace_init_cleanup(dev); - return ecode; -} - - -static void ace_set_rxtx_parms(struct net_device *dev, int jumbo) -{ - struct ace_private *ap = netdev_priv(dev); - struct ace_regs __iomem *regs = ap->regs; - int board_idx = ap->board_idx; - - if (board_idx >= 0) { - if (!jumbo) { - if (!tx_coal_tick[board_idx]) - writel(DEF_TX_COAL, ®s->TuneTxCoalTicks); - if (!max_tx_desc[board_idx]) - writel(DEF_TX_MAX_DESC, ®s->TuneMaxTxDesc); - if (!rx_coal_tick[board_idx]) - writel(DEF_RX_COAL, ®s->TuneRxCoalTicks); - if (!max_rx_desc[board_idx]) - writel(DEF_RX_MAX_DESC, ®s->TuneMaxRxDesc); - if (!tx_ratio[board_idx]) - writel(DEF_TX_RATIO, ®s->TxBufRat); - } else { - if (!tx_coal_tick[board_idx]) - writel(DEF_JUMBO_TX_COAL, - ®s->TuneTxCoalTicks); - if (!max_tx_desc[board_idx]) - writel(DEF_JUMBO_TX_MAX_DESC, - ®s->TuneMaxTxDesc); - if (!rx_coal_tick[board_idx]) - writel(DEF_JUMBO_RX_COAL, - ®s->TuneRxCoalTicks); - if (!max_rx_desc[board_idx]) - writel(DEF_JUMBO_RX_MAX_DESC, - ®s->TuneMaxRxDesc); - if (!tx_ratio[board_idx]) - writel(DEF_JUMBO_TX_RATIO, ®s->TxBufRat); - } - } -} - - -static void ace_watchdog(struct net_device *data) -{ - struct net_device *dev = data; - struct ace_private *ap = netdev_priv(dev); - struct ace_regs __iomem *regs = ap->regs; - - /* - * We haven't received a stats update event for more than 2.5 - * seconds and there is data in the transmit queue, thus we - * assume the card is stuck. - */ - if (*ap->tx_csm != ap->tx_ret_csm) { - printk(KERN_WARNING "%s: Transmitter is stuck, %08x\n", - dev->name, (unsigned int)readl(®s->HostCtrl)); - /* This can happen due to ieee flow control. */ - } else { - printk(KERN_DEBUG "%s: BUG... transmitter died. Kicking it.\n", - dev->name); -#if 0 - netif_wake_queue(dev); -#endif - } -} - - -static void ace_tasklet(unsigned long arg) -{ - struct net_device *dev = (struct net_device *) arg; - struct ace_private *ap = netdev_priv(dev); - int cur_size; - - cur_size = atomic_read(&ap->cur_rx_bufs); - if ((cur_size < RX_LOW_STD_THRES) && - !test_and_set_bit(0, &ap->std_refill_busy)) { -#ifdef DEBUG - printk("refilling buffers (current %i)\n", cur_size); -#endif - ace_load_std_rx_ring(dev, RX_RING_SIZE - cur_size); - } - - if (ap->version >= 2) { - cur_size = atomic_read(&ap->cur_mini_bufs); - if ((cur_size < RX_LOW_MINI_THRES) && - !test_and_set_bit(0, &ap->mini_refill_busy)) { -#ifdef DEBUG - printk("refilling mini buffers (current %i)\n", - cur_size); -#endif - ace_load_mini_rx_ring(dev, RX_MINI_SIZE - cur_size); - } - } - - cur_size = atomic_read(&ap->cur_jumbo_bufs); - if (ap->jumbo && (cur_size < RX_LOW_JUMBO_THRES) && - !test_and_set_bit(0, &ap->jumbo_refill_busy)) { -#ifdef DEBUG - printk("refilling jumbo buffers (current %i)\n", cur_size); -#endif - ace_load_jumbo_rx_ring(dev, RX_JUMBO_SIZE - cur_size); - } - ap->tasklet_pending = 0; -} - - -/* - * Copy the contents of the NIC's trace buffer to kernel memory. - */ -static void ace_dump_trace(struct ace_private *ap) -{ -#if 0 - if (!ap->trace_buf) - if (!(ap->trace_buf = kmalloc(ACE_TRACE_SIZE, GFP_KERNEL))) - return; -#endif -} - - -/* - * Load the standard rx ring. - * - * Loading rings is safe without holding the spin lock since this is - * done only before the device is enabled, thus no interrupts are - * generated and by the interrupt handler/tasklet handler. - */ -static void ace_load_std_rx_ring(struct net_device *dev, int nr_bufs) -{ - struct ace_private *ap = netdev_priv(dev); - struct ace_regs __iomem *regs = ap->regs; - short i, idx; - - - prefetchw(&ap->cur_rx_bufs); - - idx = ap->rx_std_skbprd; - - for (i = 0; i < nr_bufs; i++) { - struct sk_buff *skb; - struct rx_desc *rd; - dma_addr_t mapping; - - skb = netdev_alloc_skb_ip_align(dev, ACE_STD_BUFSIZE); - if (!skb) - break; - - mapping = pci_map_page(ap->pdev, virt_to_page(skb->data), - offset_in_page(skb->data), - ACE_STD_BUFSIZE, - PCI_DMA_FROMDEVICE); - ap->skb->rx_std_skbuff[idx].skb = skb; - dma_unmap_addr_set(&ap->skb->rx_std_skbuff[idx], - mapping, mapping); - - rd = &ap->rx_std_ring[idx]; - set_aceaddr(&rd->addr, mapping); - rd->size = ACE_STD_BUFSIZE; - rd->idx = idx; - idx = (idx + 1) % RX_STD_RING_ENTRIES; - } - - if (!i) - goto error_out; - - atomic_add(i, &ap->cur_rx_bufs); - ap->rx_std_skbprd = idx; - - if (ACE_IS_TIGON_I(ap)) { - struct cmd cmd; - cmd.evt = C_SET_RX_PRD_IDX; - cmd.code = 0; - cmd.idx = ap->rx_std_skbprd; - ace_issue_cmd(regs, &cmd); - } else { - writel(idx, ®s->RxStdPrd); - wmb(); - } - - out: - clear_bit(0, &ap->std_refill_busy); - return; - - error_out: - printk(KERN_INFO "Out of memory when allocating " - "standard receive buffers\n"); - goto out; -} - - -static void ace_load_mini_rx_ring(struct net_device *dev, int nr_bufs) -{ - struct ace_private *ap = netdev_priv(dev); - struct ace_regs __iomem *regs = ap->regs; - short i, idx; - - prefetchw(&ap->cur_mini_bufs); - - idx = ap->rx_mini_skbprd; - for (i = 0; i < nr_bufs; i++) { - struct sk_buff *skb; - struct rx_desc *rd; - dma_addr_t mapping; - - skb = netdev_alloc_skb_ip_align(dev, ACE_MINI_BUFSIZE); - if (!skb) - break; - - mapping = pci_map_page(ap->pdev, virt_to_page(skb->data), - offset_in_page(skb->data), - ACE_MINI_BUFSIZE, - PCI_DMA_FROMDEVICE); - ap->skb->rx_mini_skbuff[idx].skb = skb; - dma_unmap_addr_set(&ap->skb->rx_mini_skbuff[idx], - mapping, mapping); - - rd = &ap->rx_mini_ring[idx]; - set_aceaddr(&rd->addr, mapping); - rd->size = ACE_MINI_BUFSIZE; - rd->idx = idx; - idx = (idx + 1) % RX_MINI_RING_ENTRIES; - } - - if (!i) - goto error_out; - - atomic_add(i, &ap->cur_mini_bufs); - - ap->rx_mini_skbprd = idx; - - writel(idx, ®s->RxMiniPrd); - wmb(); - - out: - clear_bit(0, &ap->mini_refill_busy); - return; - error_out: - printk(KERN_INFO "Out of memory when allocating " - "mini receive buffers\n"); - goto out; -} - - -/* - * Load the jumbo rx ring, this may happen at any time if the MTU - * is changed to a value > 1500. - */ -static void ace_load_jumbo_rx_ring(struct net_device *dev, int nr_bufs) -{ - struct ace_private *ap = netdev_priv(dev); - struct ace_regs __iomem *regs = ap->regs; - short i, idx; - - idx = ap->rx_jumbo_skbprd; - - for (i = 0; i < nr_bufs; i++) { - struct sk_buff *skb; - struct rx_desc *rd; - dma_addr_t mapping; - - skb = netdev_alloc_skb_ip_align(dev, ACE_JUMBO_BUFSIZE); - if (!skb) - break; - - mapping = pci_map_page(ap->pdev, virt_to_page(skb->data), - offset_in_page(skb->data), - ACE_JUMBO_BUFSIZE, - PCI_DMA_FROMDEVICE); - ap->skb->rx_jumbo_skbuff[idx].skb = skb; - dma_unmap_addr_set(&ap->skb->rx_jumbo_skbuff[idx], - mapping, mapping); - - rd = &ap->rx_jumbo_ring[idx]; - set_aceaddr(&rd->addr, mapping); - rd->size = ACE_JUMBO_BUFSIZE; - rd->idx = idx; - idx = (idx + 1) % RX_JUMBO_RING_ENTRIES; - } - - if (!i) - goto error_out; - - atomic_add(i, &ap->cur_jumbo_bufs); - ap->rx_jumbo_skbprd = idx; - - if (ACE_IS_TIGON_I(ap)) { - struct cmd cmd; - cmd.evt = C_SET_RX_JUMBO_PRD_IDX; - cmd.code = 0; - cmd.idx = ap->rx_jumbo_skbprd; - ace_issue_cmd(regs, &cmd); - } else { - writel(idx, ®s->RxJumboPrd); - wmb(); - } - - out: - clear_bit(0, &ap->jumbo_refill_busy); - return; - error_out: - if (net_ratelimit()) - printk(KERN_INFO "Out of memory when allocating " - "jumbo receive buffers\n"); - goto out; -} - - -/* - * All events are considered to be slow (RX/TX ints do not generate - * events) and are handled here, outside the main interrupt handler, - * to reduce the size of the handler. - */ -static u32 ace_handle_event(struct net_device *dev, u32 evtcsm, u32 evtprd) -{ - struct ace_private *ap; - - ap = netdev_priv(dev); - - while (evtcsm != evtprd) { - switch (ap->evt_ring[evtcsm].evt) { - case E_FW_RUNNING: - printk(KERN_INFO "%s: Firmware up and running\n", - ap->name); - ap->fw_running = 1; - wmb(); - break; - case E_STATS_UPDATED: - break; - case E_LNK_STATE: - { - u16 code = ap->evt_ring[evtcsm].code; - switch (code) { - case E_C_LINK_UP: - { - u32 state = readl(&ap->regs->GigLnkState); - printk(KERN_WARNING "%s: Optical link UP " - "(%s Duplex, Flow Control: %s%s)\n", - ap->name, - state & LNK_FULL_DUPLEX ? "Full":"Half", - state & LNK_TX_FLOW_CTL_Y ? "TX " : "", - state & LNK_RX_FLOW_CTL_Y ? "RX" : ""); - break; - } - case E_C_LINK_DOWN: - printk(KERN_WARNING "%s: Optical link DOWN\n", - ap->name); - break; - case E_C_LINK_10_100: - printk(KERN_WARNING "%s: 10/100BaseT link " - "UP\n", ap->name); - break; - default: - printk(KERN_ERR "%s: Unknown optical link " - "state %02x\n", ap->name, code); - } - break; - } - case E_ERROR: - switch(ap->evt_ring[evtcsm].code) { - case E_C_ERR_INVAL_CMD: - printk(KERN_ERR "%s: invalid command error\n", - ap->name); - break; - case E_C_ERR_UNIMP_CMD: - printk(KERN_ERR "%s: unimplemented command " - "error\n", ap->name); - break; - case E_C_ERR_BAD_CFG: - printk(KERN_ERR "%s: bad config error\n", - ap->name); - break; - default: - printk(KERN_ERR "%s: unknown error %02x\n", - ap->name, ap->evt_ring[evtcsm].code); - } - break; - case E_RESET_JUMBO_RNG: - { - int i; - for (i = 0; i < RX_JUMBO_RING_ENTRIES; i++) { - if (ap->skb->rx_jumbo_skbuff[i].skb) { - ap->rx_jumbo_ring[i].size = 0; - set_aceaddr(&ap->rx_jumbo_ring[i].addr, 0); - dev_kfree_skb(ap->skb->rx_jumbo_skbuff[i].skb); - ap->skb->rx_jumbo_skbuff[i].skb = NULL; - } - } - - if (ACE_IS_TIGON_I(ap)) { - struct cmd cmd; - cmd.evt = C_SET_RX_JUMBO_PRD_IDX; - cmd.code = 0; - cmd.idx = 0; - ace_issue_cmd(ap->regs, &cmd); - } else { - writel(0, &((ap->regs)->RxJumboPrd)); - wmb(); - } - - ap->jumbo = 0; - ap->rx_jumbo_skbprd = 0; - printk(KERN_INFO "%s: Jumbo ring flushed\n", - ap->name); - clear_bit(0, &ap->jumbo_refill_busy); - break; - } - default: - printk(KERN_ERR "%s: Unhandled event 0x%02x\n", - ap->name, ap->evt_ring[evtcsm].evt); - } - evtcsm = (evtcsm + 1) % EVT_RING_ENTRIES; - } - - return evtcsm; -} - - -static void ace_rx_int(struct net_device *dev, u32 rxretprd, u32 rxretcsm) -{ - struct ace_private *ap = netdev_priv(dev); - u32 idx; - int mini_count = 0, std_count = 0; - - idx = rxretcsm; - - prefetchw(&ap->cur_rx_bufs); - prefetchw(&ap->cur_mini_bufs); - - while (idx != rxretprd) { - struct ring_info *rip; - struct sk_buff *skb; - struct rx_desc *rxdesc, *retdesc; - u32 skbidx; - int bd_flags, desc_type, mapsize; - u16 csum; - - - /* make sure the rx descriptor isn't read before rxretprd */ - if (idx == rxretcsm) - rmb(); - - retdesc = &ap->rx_return_ring[idx]; - skbidx = retdesc->idx; - bd_flags = retdesc->flags; - desc_type = bd_flags & (BD_FLG_JUMBO | BD_FLG_MINI); - - switch(desc_type) { - /* - * Normal frames do not have any flags set - * - * Mini and normal frames arrive frequently, - * so use a local counter to avoid doing - * atomic operations for each packet arriving. - */ - case 0: - rip = &ap->skb->rx_std_skbuff[skbidx]; - mapsize = ACE_STD_BUFSIZE; - rxdesc = &ap->rx_std_ring[skbidx]; - std_count++; - break; - case BD_FLG_JUMBO: - rip = &ap->skb->rx_jumbo_skbuff[skbidx]; - mapsize = ACE_JUMBO_BUFSIZE; - rxdesc = &ap->rx_jumbo_ring[skbidx]; - atomic_dec(&ap->cur_jumbo_bufs); - break; - case BD_FLG_MINI: - rip = &ap->skb->rx_mini_skbuff[skbidx]; - mapsize = ACE_MINI_BUFSIZE; - rxdesc = &ap->rx_mini_ring[skbidx]; - mini_count++; - break; - default: - printk(KERN_INFO "%s: unknown frame type (0x%02x) " - "returned by NIC\n", dev->name, - retdesc->flags); - goto error; - } - - skb = rip->skb; - rip->skb = NULL; - pci_unmap_page(ap->pdev, - dma_unmap_addr(rip, mapping), - mapsize, - PCI_DMA_FROMDEVICE); - skb_put(skb, retdesc->size); - - /* - * Fly baby, fly! - */ - csum = retdesc->tcp_udp_csum; - - skb->protocol = eth_type_trans(skb, dev); - - /* - * Instead of forcing the poor tigon mips cpu to calculate - * pseudo hdr checksum, we do this ourselves. - */ - if (bd_flags & BD_FLG_TCP_UDP_SUM) { - skb->csum = htons(csum); - skb->ip_summed = CHECKSUM_COMPLETE; - } else { - skb_checksum_none_assert(skb); - } - - /* send it up */ - if ((bd_flags & BD_FLG_VLAN_TAG)) - __vlan_hwaccel_put_tag(skb, retdesc->vlan); - netif_rx(skb); - - dev->stats.rx_packets++; - dev->stats.rx_bytes += retdesc->size; - - idx = (idx + 1) % RX_RETURN_RING_ENTRIES; - } - - atomic_sub(std_count, &ap->cur_rx_bufs); - if (!ACE_IS_TIGON_I(ap)) - atomic_sub(mini_count, &ap->cur_mini_bufs); - - out: - /* - * According to the documentation RxRetCsm is obsolete with - * the 12.3.x Firmware - my Tigon I NICs seem to disagree! - */ - if (ACE_IS_TIGON_I(ap)) { - writel(idx, &ap->regs->RxRetCsm); - } - ap->cur_rx = idx; - - return; - error: - idx = rxretprd; - goto out; -} - - -static inline void ace_tx_int(struct net_device *dev, - u32 txcsm, u32 idx) -{ - struct ace_private *ap = netdev_priv(dev); - - do { - struct sk_buff *skb; - struct tx_ring_info *info; - - info = ap->skb->tx_skbuff + idx; - skb = info->skb; - - if (dma_unmap_len(info, maplen)) { - pci_unmap_page(ap->pdev, dma_unmap_addr(info, mapping), - dma_unmap_len(info, maplen), - PCI_DMA_TODEVICE); - dma_unmap_len_set(info, maplen, 0); - } - - if (skb) { - dev->stats.tx_packets++; - dev->stats.tx_bytes += skb->len; - dev_kfree_skb_irq(skb); - info->skb = NULL; - } - - idx = (idx + 1) % ACE_TX_RING_ENTRIES(ap); - } while (idx != txcsm); - - if (netif_queue_stopped(dev)) - netif_wake_queue(dev); - - wmb(); - ap->tx_ret_csm = txcsm; - - /* So... tx_ret_csm is advanced _after_ check for device wakeup. - * - * We could try to make it before. In this case we would get - * the following race condition: hard_start_xmit on other cpu - * enters after we advanced tx_ret_csm and fills space, - * which we have just freed, so that we make illegal device wakeup. - * There is no good way to workaround this (at entry - * to ace_start_xmit detects this condition and prevents - * ring corruption, but it is not a good workaround.) - * - * When tx_ret_csm is advanced after, we wake up device _only_ - * if we really have some space in ring (though the core doing - * hard_start_xmit can see full ring for some period and has to - * synchronize.) Superb. - * BUT! We get another subtle race condition. hard_start_xmit - * may think that ring is full between wakeup and advancing - * tx_ret_csm and will stop device instantly! It is not so bad. - * We are guaranteed that there is something in ring, so that - * the next irq will resume transmission. To speedup this we could - * mark descriptor, which closes ring with BD_FLG_COAL_NOW - * (see ace_start_xmit). - * - * Well, this dilemma exists in all lock-free devices. - * We, following scheme used in drivers by Donald Becker, - * select the least dangerous. - * --ANK - */ -} - - -static irqreturn_t ace_interrupt(int irq, void *dev_id) -{ - struct net_device *dev = (struct net_device *)dev_id; - struct ace_private *ap = netdev_priv(dev); - struct ace_regs __iomem *regs = ap->regs; - u32 idx; - u32 txcsm, rxretcsm, rxretprd; - u32 evtcsm, evtprd; - - /* - * In case of PCI shared interrupts or spurious interrupts, - * we want to make sure it is actually our interrupt before - * spending any time in here. - */ - if (!(readl(®s->HostCtrl) & IN_INT)) - return IRQ_NONE; - - /* - * ACK intr now. Otherwise we will lose updates to rx_ret_prd, - * which happened _after_ rxretprd = *ap->rx_ret_prd; but before - * writel(0, ®s->Mb0Lo). - * - * "IRQ avoidance" recommended in docs applies to IRQs served - * threads and it is wrong even for that case. - */ - writel(0, ®s->Mb0Lo); - readl(®s->Mb0Lo); - - /* - * There is no conflict between transmit handling in - * start_xmit and receive processing, thus there is no reason - * to take a spin lock for RX handling. Wait until we start - * working on the other stuff - hey we don't need a spin lock - * anymore. - */ - rxretprd = *ap->rx_ret_prd; - rxretcsm = ap->cur_rx; - - if (rxretprd != rxretcsm) - ace_rx_int(dev, rxretprd, rxretcsm); - - txcsm = *ap->tx_csm; - idx = ap->tx_ret_csm; - - if (txcsm != idx) { - /* - * If each skb takes only one descriptor this check degenerates - * to identity, because new space has just been opened. - * But if skbs are fragmented we must check that this index - * update releases enough of space, otherwise we just - * wait for device to make more work. - */ - if (!tx_ring_full(ap, txcsm, ap->tx_prd)) - ace_tx_int(dev, txcsm, idx); - } - - evtcsm = readl(®s->EvtCsm); - evtprd = *ap->evt_prd; - - if (evtcsm != evtprd) { - evtcsm = ace_handle_event(dev, evtcsm, evtprd); - writel(evtcsm, ®s->EvtCsm); - } - - /* - * This has to go last in the interrupt handler and run with - * the spin lock released ... what lock? - */ - if (netif_running(dev)) { - int cur_size; - int run_tasklet = 0; - - cur_size = atomic_read(&ap->cur_rx_bufs); - if (cur_size < RX_LOW_STD_THRES) { - if ((cur_size < RX_PANIC_STD_THRES) && - !test_and_set_bit(0, &ap->std_refill_busy)) { -#ifdef DEBUG - printk("low on std buffers %i\n", cur_size); -#endif - ace_load_std_rx_ring(dev, - RX_RING_SIZE - cur_size); - } else - run_tasklet = 1; - } - - if (!ACE_IS_TIGON_I(ap)) { - cur_size = atomic_read(&ap->cur_mini_bufs); - if (cur_size < RX_LOW_MINI_THRES) { - if ((cur_size < RX_PANIC_MINI_THRES) && - !test_and_set_bit(0, - &ap->mini_refill_busy)) { -#ifdef DEBUG - printk("low on mini buffers %i\n", - cur_size); -#endif - ace_load_mini_rx_ring(dev, - RX_MINI_SIZE - cur_size); - } else - run_tasklet = 1; - } - } - - if (ap->jumbo) { - cur_size = atomic_read(&ap->cur_jumbo_bufs); - if (cur_size < RX_LOW_JUMBO_THRES) { - if ((cur_size < RX_PANIC_JUMBO_THRES) && - !test_and_set_bit(0, - &ap->jumbo_refill_busy)){ -#ifdef DEBUG - printk("low on jumbo buffers %i\n", - cur_size); -#endif - ace_load_jumbo_rx_ring(dev, - RX_JUMBO_SIZE - cur_size); - } else - run_tasklet = 1; - } - } - if (run_tasklet && !ap->tasklet_pending) { - ap->tasklet_pending = 1; - tasklet_schedule(&ap->ace_tasklet); - } - } - - return IRQ_HANDLED; -} - -static int ace_open(struct net_device *dev) -{ - struct ace_private *ap = netdev_priv(dev); - struct ace_regs __iomem *regs = ap->regs; - struct cmd cmd; - - if (!(ap->fw_running)) { - printk(KERN_WARNING "%s: Firmware not running!\n", dev->name); - return -EBUSY; - } - - writel(dev->mtu + ETH_HLEN + 4, ®s->IfMtu); - - cmd.evt = C_CLEAR_STATS; - cmd.code = 0; - cmd.idx = 0; - ace_issue_cmd(regs, &cmd); - - cmd.evt = C_HOST_STATE; - cmd.code = C_C_STACK_UP; - cmd.idx = 0; - ace_issue_cmd(regs, &cmd); - - if (ap->jumbo && - !test_and_set_bit(0, &ap->jumbo_refill_busy)) - ace_load_jumbo_rx_ring(dev, RX_JUMBO_SIZE); - - if (dev->flags & IFF_PROMISC) { - cmd.evt = C_SET_PROMISC_MODE; - cmd.code = C_C_PROMISC_ENABLE; - cmd.idx = 0; - ace_issue_cmd(regs, &cmd); - - ap->promisc = 1; - }else - ap->promisc = 0; - ap->mcast_all = 0; - -#if 0 - cmd.evt = C_LNK_NEGOTIATION; - cmd.code = 0; - cmd.idx = 0; - ace_issue_cmd(regs, &cmd); -#endif - - netif_start_queue(dev); - - /* - * Setup the bottom half rx ring refill handler - */ - tasklet_init(&ap->ace_tasklet, ace_tasklet, (unsigned long)dev); - return 0; -} - - -static int ace_close(struct net_device *dev) -{ - struct ace_private *ap = netdev_priv(dev); - struct ace_regs __iomem *regs = ap->regs; - struct cmd cmd; - unsigned long flags; - short i; - - /* - * Without (or before) releasing irq and stopping hardware, this - * is an absolute non-sense, by the way. It will be reset instantly - * by the first irq. - */ - netif_stop_queue(dev); - - - if (ap->promisc) { - cmd.evt = C_SET_PROMISC_MODE; - cmd.code = C_C_PROMISC_DISABLE; - cmd.idx = 0; - ace_issue_cmd(regs, &cmd); - ap->promisc = 0; - } - - cmd.evt = C_HOST_STATE; - cmd.code = C_C_STACK_DOWN; - cmd.idx = 0; - ace_issue_cmd(regs, &cmd); - - tasklet_kill(&ap->ace_tasklet); - - /* - * Make sure one CPU is not processing packets while - * buffers are being released by another. - */ - - local_irq_save(flags); - ace_mask_irq(dev); - - for (i = 0; i < ACE_TX_RING_ENTRIES(ap); i++) { - struct sk_buff *skb; - struct tx_ring_info *info; - - info = ap->skb->tx_skbuff + i; - skb = info->skb; - - if (dma_unmap_len(info, maplen)) { - if (ACE_IS_TIGON_I(ap)) { - /* NB: TIGON_1 is special, tx_ring is in io space */ - struct tx_desc __iomem *tx; - tx = (__force struct tx_desc __iomem *) &ap->tx_ring[i]; - writel(0, &tx->addr.addrhi); - writel(0, &tx->addr.addrlo); - writel(0, &tx->flagsize); - } else - memset(ap->tx_ring + i, 0, - sizeof(struct tx_desc)); - pci_unmap_page(ap->pdev, dma_unmap_addr(info, mapping), - dma_unmap_len(info, maplen), - PCI_DMA_TODEVICE); - dma_unmap_len_set(info, maplen, 0); - } - if (skb) { - dev_kfree_skb(skb); - info->skb = NULL; - } - } - - if (ap->jumbo) { - cmd.evt = C_RESET_JUMBO_RNG; - cmd.code = 0; - cmd.idx = 0; - ace_issue_cmd(regs, &cmd); - } - - ace_unmask_irq(dev); - local_irq_restore(flags); - - return 0; -} - - -static inline dma_addr_t -ace_map_tx_skb(struct ace_private *ap, struct sk_buff *skb, - struct sk_buff *tail, u32 idx) -{ - dma_addr_t mapping; - struct tx_ring_info *info; - - mapping = pci_map_page(ap->pdev, virt_to_page(skb->data), - offset_in_page(skb->data), - skb->len, PCI_DMA_TODEVICE); - - info = ap->skb->tx_skbuff + idx; - info->skb = tail; - dma_unmap_addr_set(info, mapping, mapping); - dma_unmap_len_set(info, maplen, skb->len); - return mapping; -} - - -static inline void -ace_load_tx_bd(struct ace_private *ap, struct tx_desc *desc, u64 addr, - u32 flagsize, u32 vlan_tag) -{ -#if !USE_TX_COAL_NOW - flagsize &= ~BD_FLG_COAL_NOW; -#endif - - if (ACE_IS_TIGON_I(ap)) { - struct tx_desc __iomem *io = (__force struct tx_desc __iomem *) desc; - writel(addr >> 32, &io->addr.addrhi); - writel(addr & 0xffffffff, &io->addr.addrlo); - writel(flagsize, &io->flagsize); - writel(vlan_tag, &io->vlanres); - } else { - desc->addr.addrhi = addr >> 32; - desc->addr.addrlo = addr; - desc->flagsize = flagsize; - desc->vlanres = vlan_tag; - } -} - - -static netdev_tx_t ace_start_xmit(struct sk_buff *skb, - struct net_device *dev) -{ - struct ace_private *ap = netdev_priv(dev); - struct ace_regs __iomem *regs = ap->regs; - struct tx_desc *desc; - u32 idx, flagsize; - unsigned long maxjiff = jiffies + 3*HZ; - -restart: - idx = ap->tx_prd; - - if (tx_ring_full(ap, ap->tx_ret_csm, idx)) - goto overflow; - - if (!skb_shinfo(skb)->nr_frags) { - dma_addr_t mapping; - u32 vlan_tag = 0; - - mapping = ace_map_tx_skb(ap, skb, skb, idx); - flagsize = (skb->len << 16) | (BD_FLG_END); - if (skb->ip_summed == CHECKSUM_PARTIAL) - flagsize |= BD_FLG_TCP_UDP_SUM; - if (vlan_tx_tag_present(skb)) { - flagsize |= BD_FLG_VLAN_TAG; - vlan_tag = vlan_tx_tag_get(skb); - } - desc = ap->tx_ring + idx; - idx = (idx + 1) % ACE_TX_RING_ENTRIES(ap); - - /* Look at ace_tx_int for explanations. */ - if (tx_ring_full(ap, ap->tx_ret_csm, idx)) - flagsize |= BD_FLG_COAL_NOW; - - ace_load_tx_bd(ap, desc, mapping, flagsize, vlan_tag); - } else { - dma_addr_t mapping; - u32 vlan_tag = 0; - int i, len = 0; - - mapping = ace_map_tx_skb(ap, skb, NULL, idx); - flagsize = (skb_headlen(skb) << 16); - if (skb->ip_summed == CHECKSUM_PARTIAL) - flagsize |= BD_FLG_TCP_UDP_SUM; - if (vlan_tx_tag_present(skb)) { - flagsize |= BD_FLG_VLAN_TAG; - vlan_tag = vlan_tx_tag_get(skb); - } - - ace_load_tx_bd(ap, ap->tx_ring + idx, mapping, flagsize, vlan_tag); - - idx = (idx + 1) % ACE_TX_RING_ENTRIES(ap); - - for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { - skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; - struct tx_ring_info *info; - - len += frag->size; - info = ap->skb->tx_skbuff + idx; - desc = ap->tx_ring + idx; - - mapping = pci_map_page(ap->pdev, frag->page, - frag->page_offset, frag->size, - PCI_DMA_TODEVICE); - - flagsize = (frag->size << 16); - if (skb->ip_summed == CHECKSUM_PARTIAL) - flagsize |= BD_FLG_TCP_UDP_SUM; - idx = (idx + 1) % ACE_TX_RING_ENTRIES(ap); - - if (i == skb_shinfo(skb)->nr_frags - 1) { - flagsize |= BD_FLG_END; - if (tx_ring_full(ap, ap->tx_ret_csm, idx)) - flagsize |= BD_FLG_COAL_NOW; - - /* - * Only the last fragment frees - * the skb! - */ - info->skb = skb; - } else { - info->skb = NULL; - } - dma_unmap_addr_set(info, mapping, mapping); - dma_unmap_len_set(info, maplen, frag->size); - ace_load_tx_bd(ap, desc, mapping, flagsize, vlan_tag); - } - } - - wmb(); - ap->tx_prd = idx; - ace_set_txprd(regs, ap, idx); - - if (flagsize & BD_FLG_COAL_NOW) { - netif_stop_queue(dev); - - /* - * A TX-descriptor producer (an IRQ) might have gotten - * between, making the ring free again. Since xmit is - * serialized, this is the only situation we have to - * re-test. - */ - if (!tx_ring_full(ap, ap->tx_ret_csm, idx)) - netif_wake_queue(dev); - } - - return NETDEV_TX_OK; - -overflow: - /* - * This race condition is unavoidable with lock-free drivers. - * We wake up the queue _before_ tx_prd is advanced, so that we can - * enter hard_start_xmit too early, while tx ring still looks closed. - * This happens ~1-4 times per 100000 packets, so that we can allow - * to loop syncing to other CPU. Probably, we need an additional - * wmb() in ace_tx_intr as well. - * - * Note that this race is relieved by reserving one more entry - * in tx ring than it is necessary (see original non-SG driver). - * However, with SG we need to reserve 2*MAX_SKB_FRAGS+1, which - * is already overkill. - * - * Alternative is to return with 1 not throttling queue. In this - * case loop becomes longer, no more useful effects. - */ - if (time_before(jiffies, maxjiff)) { - barrier(); - cpu_relax(); - goto restart; - } - - /* The ring is stuck full. */ - printk(KERN_WARNING "%s: Transmit ring stuck full\n", dev->name); - return NETDEV_TX_BUSY; -} - - -static int ace_change_mtu(struct net_device *dev, int new_mtu) -{ - struct ace_private *ap = netdev_priv(dev); - struct ace_regs __iomem *regs = ap->regs; - - if (new_mtu > ACE_JUMBO_MTU) - return -EINVAL; - - writel(new_mtu + ETH_HLEN + 4, ®s->IfMtu); - dev->mtu = new_mtu; - - if (new_mtu > ACE_STD_MTU) { - if (!(ap->jumbo)) { - printk(KERN_INFO "%s: Enabling Jumbo frame " - "support\n", dev->name); - ap->jumbo = 1; - if (!test_and_set_bit(0, &ap->jumbo_refill_busy)) - ace_load_jumbo_rx_ring(dev, RX_JUMBO_SIZE); - ace_set_rxtx_parms(dev, 1); - } - } else { - while (test_and_set_bit(0, &ap->jumbo_refill_busy)); - ace_sync_irq(dev->irq); - ace_set_rxtx_parms(dev, 0); - if (ap->jumbo) { - struct cmd cmd; - - cmd.evt = C_RESET_JUMBO_RNG; - cmd.code = 0; - cmd.idx = 0; - ace_issue_cmd(regs, &cmd); - } - } - - return 0; -} - -static int ace_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd) -{ - struct ace_private *ap = netdev_priv(dev); - struct ace_regs __iomem *regs = ap->regs; - u32 link; - - memset(ecmd, 0, sizeof(struct ethtool_cmd)); - ecmd->supported = - (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | - SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | - SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full | - SUPPORTED_Autoneg | SUPPORTED_FIBRE); - - ecmd->port = PORT_FIBRE; - ecmd->transceiver = XCVR_INTERNAL; - - link = readl(®s->GigLnkState); - if (link & LNK_1000MB) - ethtool_cmd_speed_set(ecmd, SPEED_1000); - else { - link = readl(®s->FastLnkState); - if (link & LNK_100MB) - ethtool_cmd_speed_set(ecmd, SPEED_100); - else if (link & LNK_10MB) - ethtool_cmd_speed_set(ecmd, SPEED_10); - else - ethtool_cmd_speed_set(ecmd, 0); - } - if (link & LNK_FULL_DUPLEX) - ecmd->duplex = DUPLEX_FULL; - else - ecmd->duplex = DUPLEX_HALF; - - if (link & LNK_NEGOTIATE) - ecmd->autoneg = AUTONEG_ENABLE; - else - ecmd->autoneg = AUTONEG_DISABLE; - -#if 0 - /* - * Current struct ethtool_cmd is insufficient - */ - ecmd->trace = readl(®s->TuneTrace); - - ecmd->txcoal = readl(®s->TuneTxCoalTicks); - ecmd->rxcoal = readl(®s->TuneRxCoalTicks); -#endif - ecmd->maxtxpkt = readl(®s->TuneMaxTxDesc); - ecmd->maxrxpkt = readl(®s->TuneMaxRxDesc); - - return 0; -} - -static int ace_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd) -{ - struct ace_private *ap = netdev_priv(dev); - struct ace_regs __iomem *regs = ap->regs; - u32 link, speed; - - link = readl(®s->GigLnkState); - if (link & LNK_1000MB) - speed = SPEED_1000; - else { - link = readl(®s->FastLnkState); - if (link & LNK_100MB) - speed = SPEED_100; - else if (link & LNK_10MB) - speed = SPEED_10; - else - speed = SPEED_100; - } - - link = LNK_ENABLE | LNK_1000MB | LNK_100MB | LNK_10MB | - LNK_RX_FLOW_CTL_Y | LNK_NEG_FCTL; - if (!ACE_IS_TIGON_I(ap)) - link |= LNK_TX_FLOW_CTL_Y; - if (ecmd->autoneg == AUTONEG_ENABLE) - link |= LNK_NEGOTIATE; - if (ethtool_cmd_speed(ecmd) != speed) { - link &= ~(LNK_1000MB | LNK_100MB | LNK_10MB); - switch (ethtool_cmd_speed(ecmd)) { - case SPEED_1000: - link |= LNK_1000MB; - break; - case SPEED_100: - link |= LNK_100MB; - break; - case SPEED_10: - link |= LNK_10MB; - break; - } - } - - if (ecmd->duplex == DUPLEX_FULL) - link |= LNK_FULL_DUPLEX; - - if (link != ap->link) { - struct cmd cmd; - printk(KERN_INFO "%s: Renegotiating link state\n", - dev->name); - - ap->link = link; - writel(link, ®s->TuneLink); - if (!ACE_IS_TIGON_I(ap)) - writel(link, ®s->TuneFastLink); - wmb(); - - cmd.evt = C_LNK_NEGOTIATION; - cmd.code = 0; - cmd.idx = 0; - ace_issue_cmd(regs, &cmd); - } - return 0; -} - -static void ace_get_drvinfo(struct net_device *dev, - struct ethtool_drvinfo *info) -{ - struct ace_private *ap = netdev_priv(dev); - - strlcpy(info->driver, "acenic", sizeof(info->driver)); - snprintf(info->version, sizeof(info->version), "%i.%i.%i", - ap->firmware_major, ap->firmware_minor, - ap->firmware_fix); - - if (ap->pdev) - strlcpy(info->bus_info, pci_name(ap->pdev), - sizeof(info->bus_info)); - -} - -/* - * Set the hardware MAC address. - */ -static int ace_set_mac_addr(struct net_device *dev, void *p) -{ - struct ace_private *ap = netdev_priv(dev); - struct ace_regs __iomem *regs = ap->regs; - struct sockaddr *addr=p; - u8 *da; - struct cmd cmd; - - if(netif_running(dev)) - return -EBUSY; - - memcpy(dev->dev_addr, addr->sa_data,dev->addr_len); - - da = (u8 *)dev->dev_addr; - - writel(da[0] << 8 | da[1], ®s->MacAddrHi); - writel((da[2] << 24) | (da[3] << 16) | (da[4] << 8) | da[5], - ®s->MacAddrLo); - - cmd.evt = C_SET_MAC_ADDR; - cmd.code = 0; - cmd.idx = 0; - ace_issue_cmd(regs, &cmd); - - return 0; -} - - -static void ace_set_multicast_list(struct net_device *dev) -{ - struct ace_private *ap = netdev_priv(dev); - struct ace_regs __iomem *regs = ap->regs; - struct cmd cmd; - - if ((dev->flags & IFF_ALLMULTI) && !(ap->mcast_all)) { - cmd.evt = C_SET_MULTICAST_MODE; - cmd.code = C_C_MCAST_ENABLE; - cmd.idx = 0; - ace_issue_cmd(regs, &cmd); - ap->mcast_all = 1; - } else if (ap->mcast_all) { - cmd.evt = C_SET_MULTICAST_MODE; - cmd.code = C_C_MCAST_DISABLE; - cmd.idx = 0; - ace_issue_cmd(regs, &cmd); - ap->mcast_all = 0; - } - - if ((dev->flags & IFF_PROMISC) && !(ap->promisc)) { - cmd.evt = C_SET_PROMISC_MODE; - cmd.code = C_C_PROMISC_ENABLE; - cmd.idx = 0; - ace_issue_cmd(regs, &cmd); - ap->promisc = 1; - }else if (!(dev->flags & IFF_PROMISC) && (ap->promisc)) { - cmd.evt = C_SET_PROMISC_MODE; - cmd.code = C_C_PROMISC_DISABLE; - cmd.idx = 0; - ace_issue_cmd(regs, &cmd); - ap->promisc = 0; - } - - /* - * For the time being multicast relies on the upper layers - * filtering it properly. The Firmware does not allow one to - * set the entire multicast list at a time and keeping track of - * it here is going to be messy. - */ - if (!netdev_mc_empty(dev) && !ap->mcast_all) { - cmd.evt = C_SET_MULTICAST_MODE; - cmd.code = C_C_MCAST_ENABLE; - cmd.idx = 0; - ace_issue_cmd(regs, &cmd); - }else if (!ap->mcast_all) { - cmd.evt = C_SET_MULTICAST_MODE; - cmd.code = C_C_MCAST_DISABLE; - cmd.idx = 0; - ace_issue_cmd(regs, &cmd); - } -} - - -static struct net_device_stats *ace_get_stats(struct net_device *dev) -{ - struct ace_private *ap = netdev_priv(dev); - struct ace_mac_stats __iomem *mac_stats = - (struct ace_mac_stats __iomem *)ap->regs->Stats; - - dev->stats.rx_missed_errors = readl(&mac_stats->drop_space); - dev->stats.multicast = readl(&mac_stats->kept_mc); - dev->stats.collisions = readl(&mac_stats->coll); - - return &dev->stats; -} - - -static void __devinit ace_copy(struct ace_regs __iomem *regs, const __be32 *src, - u32 dest, int size) -{ - void __iomem *tdest; - short tsize, i; - - if (size <= 0) - return; - - while (size > 0) { - tsize = min_t(u32, ((~dest & (ACE_WINDOW_SIZE - 1)) + 1), - min_t(u32, size, ACE_WINDOW_SIZE)); - tdest = (void __iomem *) ®s->Window + - (dest & (ACE_WINDOW_SIZE - 1)); - writel(dest & ~(ACE_WINDOW_SIZE - 1), ®s->WinBase); - for (i = 0; i < (tsize / 4); i++) { - /* Firmware is big-endian */ - writel(be32_to_cpup(src), tdest); - src++; - tdest += 4; - dest += 4; - size -= 4; - } - } -} - - -static void __devinit ace_clear(struct ace_regs __iomem *regs, u32 dest, int size) -{ - void __iomem *tdest; - short tsize = 0, i; - - if (size <= 0) - return; - - while (size > 0) { - tsize = min_t(u32, ((~dest & (ACE_WINDOW_SIZE - 1)) + 1), - min_t(u32, size, ACE_WINDOW_SIZE)); - tdest = (void __iomem *) ®s->Window + - (dest & (ACE_WINDOW_SIZE - 1)); - writel(dest & ~(ACE_WINDOW_SIZE - 1), ®s->WinBase); - - for (i = 0; i < (tsize / 4); i++) { - writel(0, tdest + i*4); - } - - dest += tsize; - size -= tsize; - } -} - - -/* - * Download the firmware into the SRAM on the NIC - * - * This operation requires the NIC to be halted and is performed with - * interrupts disabled and with the spinlock hold. - */ -static int __devinit ace_load_firmware(struct net_device *dev) -{ - const struct firmware *fw; - const char *fw_name = "acenic/tg2.bin"; - struct ace_private *ap = netdev_priv(dev); - struct ace_regs __iomem *regs = ap->regs; - const __be32 *fw_data; - u32 load_addr; - int ret; - - if (!(readl(®s->CpuCtrl) & CPU_HALTED)) { - printk(KERN_ERR "%s: trying to download firmware while the " - "CPU is running!\n", ap->name); - return -EFAULT; - } - - if (ACE_IS_TIGON_I(ap)) - fw_name = "acenic/tg1.bin"; - - ret = request_firmware(&fw, fw_name, &ap->pdev->dev); - if (ret) { - printk(KERN_ERR "%s: Failed to load firmware \"%s\"\n", - ap->name, fw_name); - return ret; - } - - fw_data = (void *)fw->data; - - /* Firmware blob starts with version numbers, followed by - load and start address. Remainder is the blob to be loaded - contiguously from load address. We don't bother to represent - the BSS/SBSS sections any more, since we were clearing the - whole thing anyway. */ - ap->firmware_major = fw->data[0]; - ap->firmware_minor = fw->data[1]; - ap->firmware_fix = fw->data[2]; - - ap->firmware_start = be32_to_cpu(fw_data[1]); - if (ap->firmware_start < 0x4000 || ap->firmware_start >= 0x80000) { - printk(KERN_ERR "%s: bogus load address %08x in \"%s\"\n", - ap->name, ap->firmware_start, fw_name); - ret = -EINVAL; - goto out; - } - - load_addr = be32_to_cpu(fw_data[2]); - if (load_addr < 0x4000 || load_addr >= 0x80000) { - printk(KERN_ERR "%s: bogus load address %08x in \"%s\"\n", - ap->name, load_addr, fw_name); - ret = -EINVAL; - goto out; - } - - /* - * Do not try to clear more than 512KiB or we end up seeing - * funny things on NICs with only 512KiB SRAM - */ - ace_clear(regs, 0x2000, 0x80000-0x2000); - ace_copy(regs, &fw_data[3], load_addr, fw->size-12); - out: - release_firmware(fw); - return ret; -} - - -/* - * The eeprom on the AceNIC is an Atmel i2c EEPROM. - * - * Accessing the EEPROM is `interesting' to say the least - don't read - * this code right after dinner. - * - * This is all about black magic and bit-banging the device .... I - * wonder in what hospital they have put the guy who designed the i2c - * specs. - * - * Oh yes, this is only the beginning! - * - * Thanks to Stevarino Webinski for helping tracking down the bugs in the - * code i2c readout code by beta testing all my hacks. - */ -static void __devinit eeprom_start(struct ace_regs __iomem *regs) -{ - u32 local; - - readl(®s->LocalCtrl); - udelay(ACE_SHORT_DELAY); - local = readl(®s->LocalCtrl); - local |= EEPROM_DATA_OUT | EEPROM_WRITE_ENABLE; - writel(local, ®s->LocalCtrl); - readl(®s->LocalCtrl); - mb(); - udelay(ACE_SHORT_DELAY); - local |= EEPROM_CLK_OUT; - writel(local, ®s->LocalCtrl); - readl(®s->LocalCtrl); - mb(); - udelay(ACE_SHORT_DELAY); - local &= ~EEPROM_DATA_OUT; - writel(local, ®s->LocalCtrl); - readl(®s->LocalCtrl); - mb(); - udelay(ACE_SHORT_DELAY); - local &= ~EEPROM_CLK_OUT; - writel(local, ®s->LocalCtrl); - readl(®s->LocalCtrl); - mb(); -} - - -static void __devinit eeprom_prep(struct ace_regs __iomem *regs, u8 magic) -{ - short i; - u32 local; - - udelay(ACE_SHORT_DELAY); - local = readl(®s->LocalCtrl); - local &= ~EEPROM_DATA_OUT; - local |= EEPROM_WRITE_ENABLE; - writel(local, ®s->LocalCtrl); - readl(®s->LocalCtrl); - mb(); - - for (i = 0; i < 8; i++, magic <<= 1) { - udelay(ACE_SHORT_DELAY); - if (magic & 0x80) - local |= EEPROM_DATA_OUT; - else - local &= ~EEPROM_DATA_OUT; - writel(local, ®s->LocalCtrl); - readl(®s->LocalCtrl); - mb(); - - udelay(ACE_SHORT_DELAY); - local |= EEPROM_CLK_OUT; - writel(local, ®s->LocalCtrl); - readl(®s->LocalCtrl); - mb(); - udelay(ACE_SHORT_DELAY); - local &= ~(EEPROM_CLK_OUT | EEPROM_DATA_OUT); - writel(local, ®s->LocalCtrl); - readl(®s->LocalCtrl); - mb(); - } -} - - -static int __devinit eeprom_check_ack(struct ace_regs __iomem *regs) -{ - int state; - u32 local; - - local = readl(®s->LocalCtrl); - local &= ~EEPROM_WRITE_ENABLE; - writel(local, ®s->LocalCtrl); - readl(®s->LocalCtrl); - mb(); - udelay(ACE_LONG_DELAY); - local |= EEPROM_CLK_OUT; - writel(local, ®s->LocalCtrl); - readl(®s->LocalCtrl); - mb(); - udelay(ACE_SHORT_DELAY); - /* sample data in middle of high clk */ - state = (readl(®s->LocalCtrl) & EEPROM_DATA_IN) != 0; - udelay(ACE_SHORT_DELAY); - mb(); - writel(readl(®s->LocalCtrl) & ~EEPROM_CLK_OUT, ®s->LocalCtrl); - readl(®s->LocalCtrl); - mb(); - - return state; -} - - -static void __devinit eeprom_stop(struct ace_regs __iomem *regs) -{ - u32 local; - - udelay(ACE_SHORT_DELAY); - local = readl(®s->LocalCtrl); - local |= EEPROM_WRITE_ENABLE; - writel(local, ®s->LocalCtrl); - readl(®s->LocalCtrl); - mb(); - udelay(ACE_SHORT_DELAY); - local &= ~EEPROM_DATA_OUT; - writel(local, ®s->LocalCtrl); - readl(®s->LocalCtrl); - mb(); - udelay(ACE_SHORT_DELAY); - local |= EEPROM_CLK_OUT; - writel(local, ®s->LocalCtrl); - readl(®s->LocalCtrl); - mb(); - udelay(ACE_SHORT_DELAY); - local |= EEPROM_DATA_OUT; - writel(local, ®s->LocalCtrl); - readl(®s->LocalCtrl); - mb(); - udelay(ACE_LONG_DELAY); - local &= ~EEPROM_CLK_OUT; - writel(local, ®s->LocalCtrl); - mb(); -} - - -/* - * Read a whole byte from the EEPROM. - */ -static int __devinit read_eeprom_byte(struct net_device *dev, - unsigned long offset) -{ - struct ace_private *ap = netdev_priv(dev); - struct ace_regs __iomem *regs = ap->regs; - unsigned long flags; - u32 local; - int result = 0; - short i; - - /* - * Don't take interrupts on this CPU will bit banging - * the %#%#@$ I2C device - */ - local_irq_save(flags); - - eeprom_start(regs); - - eeprom_prep(regs, EEPROM_WRITE_SELECT); - if (eeprom_check_ack(regs)) { - local_irq_restore(flags); - printk(KERN_ERR "%s: Unable to sync eeprom\n", ap->name); - result = -EIO; - goto eeprom_read_error; - } - - eeprom_prep(regs, (offset >> 8) & 0xff); - if (eeprom_check_ack(regs)) { - local_irq_restore(flags); - printk(KERN_ERR "%s: Unable to set address byte 0\n", - ap->name); - result = -EIO; - goto eeprom_read_error; - } - - eeprom_prep(regs, offset & 0xff); - if (eeprom_check_ack(regs)) { - local_irq_restore(flags); - printk(KERN_ERR "%s: Unable to set address byte 1\n", - ap->name); - result = -EIO; - goto eeprom_read_error; - } - - eeprom_start(regs); - eeprom_prep(regs, EEPROM_READ_SELECT); - if (eeprom_check_ack(regs)) { - local_irq_restore(flags); - printk(KERN_ERR "%s: Unable to set READ_SELECT\n", - ap->name); - result = -EIO; - goto eeprom_read_error; - } - - for (i = 0; i < 8; i++) { - local = readl(®s->LocalCtrl); - local &= ~EEPROM_WRITE_ENABLE; - writel(local, ®s->LocalCtrl); - readl(®s->LocalCtrl); - udelay(ACE_LONG_DELAY); - mb(); - local |= EEPROM_CLK_OUT; - writel(local, ®s->LocalCtrl); - readl(®s->LocalCtrl); - mb(); - udelay(ACE_SHORT_DELAY); - /* sample data mid high clk */ - result = (result << 1) | - ((readl(®s->LocalCtrl) & EEPROM_DATA_IN) != 0); - udelay(ACE_SHORT_DELAY); - mb(); - local = readl(®s->LocalCtrl); - local &= ~EEPROM_CLK_OUT; - writel(local, ®s->LocalCtrl); - readl(®s->LocalCtrl); - udelay(ACE_SHORT_DELAY); - mb(); - if (i == 7) { - local |= EEPROM_WRITE_ENABLE; - writel(local, ®s->LocalCtrl); - readl(®s->LocalCtrl); - mb(); - udelay(ACE_SHORT_DELAY); - } - } - - local |= EEPROM_DATA_OUT; - writel(local, ®s->LocalCtrl); - readl(®s->LocalCtrl); - mb(); - udelay(ACE_SHORT_DELAY); - writel(readl(®s->LocalCtrl) | EEPROM_CLK_OUT, ®s->LocalCtrl); - readl(®s->LocalCtrl); - udelay(ACE_LONG_DELAY); - writel(readl(®s->LocalCtrl) & ~EEPROM_CLK_OUT, ®s->LocalCtrl); - readl(®s->LocalCtrl); - mb(); - udelay(ACE_SHORT_DELAY); - eeprom_stop(regs); - - local_irq_restore(flags); - out: - return result; - - eeprom_read_error: - printk(KERN_ERR "%s: Unable to read eeprom byte 0x%02lx\n", - ap->name, offset); - goto out; -} diff --git a/drivers/net/ethernet/3com/acenic.h b/drivers/net/ethernet/3com/acenic.h deleted file mode 100644 index 51c486cfbb8c..000000000000 --- a/drivers/net/ethernet/3com/acenic.h +++ /dev/null @@ -1,790 +0,0 @@ -#ifndef _ACENIC_H_ -#define _ACENIC_H_ -#include - - -/* - * Generate TX index update each time, when TX ring is closed. - * Normally, this is not useful, because results in more dma (and irqs - * without TX_COAL_INTS_ONLY). - */ -#define USE_TX_COAL_NOW 0 - -/* - * Addressing: - * - * The Tigon uses 64-bit host addresses, regardless of their actual - * length, and it expects a big-endian format. For 32 bit systems the - * upper 32 bits of the address are simply ignored (zero), however for - * little endian 64 bit systems (Alpha) this looks strange with the - * two parts of the address word being swapped. - * - * The addresses are split in two 32 bit words for all architectures - * as some of them are in PCI shared memory and it is necessary to use - * readl/writel to access them. - * - * The addressing code is derived from Pete Wyckoff's work, but - * modified to deal properly with readl/writel usage. - */ - -struct ace_regs { - u32 pad0[16]; /* PCI control registers */ - - u32 HostCtrl; /* 0x40 */ - u32 LocalCtrl; - - u32 pad1[2]; - - u32 MiscCfg; /* 0x50 */ - - u32 pad2[2]; - - u32 PciState; - - u32 pad3[2]; /* 0x60 */ - - u32 WinBase; - u32 WinData; - - u32 pad4[12]; /* 0x70 */ - - u32 DmaWriteState; /* 0xa0 */ - u32 pad5[3]; - u32 DmaReadState; /* 0xb0 */ - - u32 pad6[26]; - - u32 AssistState; - - u32 pad7[8]; /* 0x120 */ - - u32 CpuCtrl; /* 0x140 */ - u32 Pc; - - u32 pad8[3]; - - u32 SramAddr; /* 0x154 */ - u32 SramData; - - u32 pad9[49]; - - u32 MacRxState; /* 0x220 */ - - u32 pad10[7]; - - u32 CpuBCtrl; /* 0x240 */ - u32 PcB; - - u32 pad11[3]; - - u32 SramBAddr; /* 0x254 */ - u32 SramBData; - - u32 pad12[105]; - - u32 pad13[32]; /* 0x400 */ - u32 Stats[32]; - - u32 Mb0Hi; /* 0x500 */ - u32 Mb0Lo; - u32 Mb1Hi; - u32 CmdPrd; - u32 Mb2Hi; - u32 TxPrd; - u32 Mb3Hi; - u32 RxStdPrd; - u32 Mb4Hi; - u32 RxJumboPrd; - u32 Mb5Hi; - u32 RxMiniPrd; - u32 Mb6Hi; - u32 Mb6Lo; - u32 Mb7Hi; - u32 Mb7Lo; - u32 Mb8Hi; - u32 Mb8Lo; - u32 Mb9Hi; - u32 Mb9Lo; - u32 MbAHi; - u32 MbALo; - u32 MbBHi; - u32 MbBLo; - u32 MbCHi; - u32 MbCLo; - u32 MbDHi; - u32 MbDLo; - u32 MbEHi; - u32 MbELo; - u32 MbFHi; - u32 MbFLo; - - u32 pad14[32]; - - u32 MacAddrHi; /* 0x600 */ - u32 MacAddrLo; - u32 InfoPtrHi; - u32 InfoPtrLo; - u32 MultiCastHi; /* 0x610 */ - u32 MultiCastLo; - u32 ModeStat; - u32 DmaReadCfg; - u32 DmaWriteCfg; /* 0x620 */ - u32 TxBufRat; - u32 EvtCsm; - u32 CmdCsm; - u32 TuneRxCoalTicks;/* 0x630 */ - u32 TuneTxCoalTicks; - u32 TuneStatTicks; - u32 TuneMaxTxDesc; - u32 TuneMaxRxDesc; /* 0x640 */ - u32 TuneTrace; - u32 TuneLink; - u32 TuneFastLink; - u32 TracePtr; /* 0x650 */ - u32 TraceStrt; - u32 TraceLen; - u32 IfIdx; - u32 IfMtu; /* 0x660 */ - u32 MaskInt; - u32 GigLnkState; - u32 FastLnkState; - u32 pad16[4]; /* 0x670 */ - u32 RxRetCsm; /* 0x680 */ - - u32 pad17[31]; - - u32 CmdRng[64]; /* 0x700 */ - u32 Window[0x200]; -}; - - -typedef struct { - u32 addrhi; - u32 addrlo; -} aceaddr; - - -#define ACE_WINDOW_SIZE 0x800 - -#define ACE_JUMBO_MTU 9000 -#define ACE_STD_MTU 1500 - -#define ACE_TRACE_SIZE 0x8000 - -/* - * Host control register bits. - */ - -#define IN_INT 0x01 -#define CLR_INT 0x02 -#define HW_RESET 0x08 -#define BYTE_SWAP 0x10 -#define WORD_SWAP 0x20 -#define MASK_INTS 0x40 - -/* - * Local control register bits. - */ - -#define EEPROM_DATA_IN 0x800000 -#define EEPROM_DATA_OUT 0x400000 -#define EEPROM_WRITE_ENABLE 0x200000 -#define EEPROM_CLK_OUT 0x100000 - -#define EEPROM_BASE 0xa0000000 - -#define EEPROM_WRITE_SELECT 0xa0 -#define EEPROM_READ_SELECT 0xa1 - -#define SRAM_BANK_512K 0x200 - - -/* - * udelay() values for when clocking the eeprom - */ -#define ACE_SHORT_DELAY 2 -#define ACE_LONG_DELAY 4 - - -/* - * Misc Config bits - */ - -#define SYNC_SRAM_TIMING 0x100000 - - -/* - * CPU state bits. - */ - -#define CPU_RESET 0x01 -#define CPU_TRACE 0x02 -#define CPU_PROM_FAILED 0x10 -#define CPU_HALT 0x00010000 -#define CPU_HALTED 0xffff0000 - - -/* - * PCI State bits. - */ - -#define DMA_READ_MAX_4 0x04 -#define DMA_READ_MAX_16 0x08 -#define DMA_READ_MAX_32 0x0c -#define DMA_READ_MAX_64 0x10 -#define DMA_READ_MAX_128 0x14 -#define DMA_READ_MAX_256 0x18 -#define DMA_READ_MAX_1K 0x1c -#define DMA_WRITE_MAX_4 0x20 -#define DMA_WRITE_MAX_16 0x40 -#define DMA_WRITE_MAX_32 0x60 -#define DMA_WRITE_MAX_64 0x80 -#define DMA_WRITE_MAX_128 0xa0 -#define DMA_WRITE_MAX_256 0xc0 -#define DMA_WRITE_MAX_1K 0xe0 -#define DMA_READ_WRITE_MASK 0xfc -#define MEM_READ_MULTIPLE 0x00020000 -#define PCI_66MHZ 0x00080000 -#define PCI_32BIT 0x00100000 -#define DMA_WRITE_ALL_ALIGN 0x00800000 -#define READ_CMD_MEM 0x06000000 -#define WRITE_CMD_MEM 0x70000000 - - -/* - * Mode status - */ - -#define ACE_BYTE_SWAP_BD 0x02 -#define ACE_WORD_SWAP_BD 0x04 /* not actually used */ -#define ACE_WARN 0x08 -#define ACE_BYTE_SWAP_DMA 0x10 -#define ACE_NO_JUMBO_FRAG 0x200 -#define ACE_FATAL 0x40000000 - - -/* - * DMA config - */ - -#define DMA_THRESH_1W 0x10 -#define DMA_THRESH_2W 0x20 -#define DMA_THRESH_4W 0x40 -#define DMA_THRESH_8W 0x80 -#define DMA_THRESH_16W 0x100 -#define DMA_THRESH_32W 0x0 /* not described in doc, but exists. */ - - -/* - * Tuning parameters - */ - -#define TICKS_PER_SEC 1000000 - - -/* - * Link bits - */ - -#define LNK_PREF 0x00008000 -#define LNK_10MB 0x00010000 -#define LNK_100MB 0x00020000 -#define LNK_1000MB 0x00040000 -#define LNK_FULL_DUPLEX 0x00080000 -#define LNK_HALF_DUPLEX 0x00100000 -#define LNK_TX_FLOW_CTL_Y 0x00200000 -#define LNK_NEG_ADVANCED 0x00400000 -#define LNK_RX_FLOW_CTL_Y 0x00800000 -#define LNK_NIC 0x01000000 -#define LNK_JAM 0x02000000 -#define LNK_JUMBO 0x04000000 -#define LNK_ALTEON 0x08000000 -#define LNK_NEG_FCTL 0x10000000 -#define LNK_NEGOTIATE 0x20000000 -#define LNK_ENABLE 0x40000000 -#define LNK_UP 0x80000000 - - -/* - * Event definitions - */ - -#define EVT_RING_ENTRIES 256 -#define EVT_RING_SIZE (EVT_RING_ENTRIES * sizeof(struct event)) - -struct event { -#ifdef __LITTLE_ENDIAN_BITFIELD - u32 idx:12; - u32 code:12; - u32 evt:8; -#else - u32 evt:8; - u32 code:12; - u32 idx:12; -#endif - u32 pad; -}; - - -/* - * Events - */ - -#define E_FW_RUNNING 0x01 -#define E_STATS_UPDATED 0x04 - -#define E_STATS_UPDATE 0x04 - -#define E_LNK_STATE 0x06 -#define E_C_LINK_UP 0x01 -#define E_C_LINK_DOWN 0x02 -#define E_C_LINK_10_100 0x03 - -#define E_ERROR 0x07 -#define E_C_ERR_INVAL_CMD 0x01 -#define E_C_ERR_UNIMP_CMD 0x02 -#define E_C_ERR_BAD_CFG 0x03 - -#define E_MCAST_LIST 0x08 -#define E_C_MCAST_ADDR_ADD 0x01 -#define E_C_MCAST_ADDR_DEL 0x02 - -#define E_RESET_JUMBO_RNG 0x09 - - -/* - * Commands - */ - -#define CMD_RING_ENTRIES 64 - -struct cmd { -#ifdef __LITTLE_ENDIAN_BITFIELD - u32 idx:12; - u32 code:12; - u32 evt:8; -#else - u32 evt:8; - u32 code:12; - u32 idx:12; -#endif -}; - - -#define C_HOST_STATE 0x01 -#define C_C_STACK_UP 0x01 -#define C_C_STACK_DOWN 0x02 - -#define C_FDR_FILTERING 0x02 -#define C_C_FDR_FILT_ENABLE 0x01 -#define C_C_FDR_FILT_DISABLE 0x02 - -#define C_SET_RX_PRD_IDX 0x03 -#define C_UPDATE_STATS 0x04 -#define C_RESET_JUMBO_RNG 0x05 -#define C_ADD_MULTICAST_ADDR 0x08 -#define C_DEL_MULTICAST_ADDR 0x09 - -#define C_SET_PROMISC_MODE 0x0a -#define C_C_PROMISC_ENABLE 0x01 -#define C_C_PROMISC_DISABLE 0x02 - -#define C_LNK_NEGOTIATION 0x0b -#define C_C_NEGOTIATE_BOTH 0x00 -#define C_C_NEGOTIATE_GIG 0x01 -#define C_C_NEGOTIATE_10_100 0x02 - -#define C_SET_MAC_ADDR 0x0c -#define C_CLEAR_PROFILE 0x0d - -#define C_SET_MULTICAST_MODE 0x0e -#define C_C_MCAST_ENABLE 0x01 -#define C_C_MCAST_DISABLE 0x02 - -#define C_CLEAR_STATS 0x0f -#define C_SET_RX_JUMBO_PRD_IDX 0x10 -#define C_REFRESH_STATS 0x11 - - -/* - * Descriptor flags - */ -#define BD_FLG_TCP_UDP_SUM 0x01 -#define BD_FLG_IP_SUM 0x02 -#define BD_FLG_END 0x04 -#define BD_FLG_MORE 0x08 -#define BD_FLG_JUMBO 0x10 -#define BD_FLG_UCAST 0x20 -#define BD_FLG_MCAST 0x40 -#define BD_FLG_BCAST 0x60 -#define BD_FLG_TYP_MASK 0x60 -#define BD_FLG_IP_FRAG 0x80 -#define BD_FLG_IP_FRAG_END 0x100 -#define BD_FLG_VLAN_TAG 0x200 -#define BD_FLG_FRAME_ERROR 0x400 -#define BD_FLG_COAL_NOW 0x800 -#define BD_FLG_MINI 0x1000 - - -/* - * Ring Control block flags - */ -#define RCB_FLG_TCP_UDP_SUM 0x01 -#define RCB_FLG_IP_SUM 0x02 -#define RCB_FLG_NO_PSEUDO_HDR 0x08 -#define RCB_FLG_VLAN_ASSIST 0x10 -#define RCB_FLG_COAL_INT_ONLY 0x20 -#define RCB_FLG_TX_HOST_RING 0x40 -#define RCB_FLG_IEEE_SNAP_SUM 0x80 -#define RCB_FLG_EXT_RX_BD 0x100 -#define RCB_FLG_RNG_DISABLE 0x200 - - -/* - * TX ring - maximum TX ring entries for Tigon I's is 128 - */ -#define MAX_TX_RING_ENTRIES 256 -#define TIGON_I_TX_RING_ENTRIES 128 -#define TX_RING_SIZE (MAX_TX_RING_ENTRIES * sizeof(struct tx_desc)) -#define TX_RING_BASE 0x3800 - -struct tx_desc{ - aceaddr addr; - u32 flagsize; -#if 0 -/* - * This is in PCI shared mem and must be accessed with readl/writel - * real layout is: - */ -#if __LITTLE_ENDIAN - u16 flags; - u16 size; - u16 vlan; - u16 reserved; -#else - u16 size; - u16 flags; - u16 reserved; - u16 vlan; -#endif -#endif - u32 vlanres; -}; - - -#define RX_STD_RING_ENTRIES 512 -#define RX_STD_RING_SIZE (RX_STD_RING_ENTRIES * sizeof(struct rx_desc)) - -#define RX_JUMBO_RING_ENTRIES 256 -#define RX_JUMBO_RING_SIZE (RX_JUMBO_RING_ENTRIES *sizeof(struct rx_desc)) - -#define RX_MINI_RING_ENTRIES 1024 -#define RX_MINI_RING_SIZE (RX_MINI_RING_ENTRIES *sizeof(struct rx_desc)) - -#define RX_RETURN_RING_ENTRIES 2048 -#define RX_RETURN_RING_SIZE (RX_MAX_RETURN_RING_ENTRIES * \ - sizeof(struct rx_desc)) - -struct rx_desc{ - aceaddr addr; -#ifdef __LITTLE_ENDIAN - u16 size; - u16 idx; -#else - u16 idx; - u16 size; -#endif -#ifdef __LITTLE_ENDIAN - u16 flags; - u16 type; -#else - u16 type; - u16 flags; -#endif -#ifdef __LITTLE_ENDIAN - u16 tcp_udp_csum; - u16 ip_csum; -#else - u16 ip_csum; - u16 tcp_udp_csum; -#endif -#ifdef __LITTLE_ENDIAN - u16 vlan; - u16 err_flags; -#else - u16 err_flags; - u16 vlan; -#endif - u32 reserved; - u32 opague; -}; - - -/* - * This struct is shared with the NIC firmware. - */ -struct ring_ctrl { - aceaddr rngptr; -#ifdef __LITTLE_ENDIAN - u16 flags; - u16 max_len; -#else - u16 max_len; - u16 flags; -#endif - u32 pad; -}; - - -struct ace_mac_stats { - u32 excess_colls; - u32 coll_1; - u32 coll_2; - u32 coll_3; - u32 coll_4; - u32 coll_5; - u32 coll_6; - u32 coll_7; - u32 coll_8; - u32 coll_9; - u32 coll_10; - u32 coll_11; - u32 coll_12; - u32 coll_13; - u32 coll_14; - u32 coll_15; - u32 late_coll; - u32 defers; - u32 crc_err; - u32 underrun; - u32 crs_err; - u32 pad[3]; - u32 drop_ula; - u32 drop_mc; - u32 drop_fc; - u32 drop_space; - u32 coll; - u32 kept_bc; - u32 kept_mc; - u32 kept_uc; -}; - - -struct ace_info { - union { - u32 stats[256]; - } s; - struct ring_ctrl evt_ctrl; - struct ring_ctrl cmd_ctrl; - struct ring_ctrl tx_ctrl; - struct ring_ctrl rx_std_ctrl; - struct ring_ctrl rx_jumbo_ctrl; - struct ring_ctrl rx_mini_ctrl; - struct ring_ctrl rx_return_ctrl; - aceaddr evt_prd_ptr; - aceaddr rx_ret_prd_ptr; - aceaddr tx_csm_ptr; - aceaddr stats2_ptr; -}; - - -struct ring_info { - struct sk_buff *skb; - DEFINE_DMA_UNMAP_ADDR(mapping); -}; - - -/* - * Funny... As soon as we add maplen on alpha, it starts to work - * much slower. Hmm... is it because struct does not fit to one cacheline? - * So, split tx_ring_info. - */ -struct tx_ring_info { - struct sk_buff *skb; - DEFINE_DMA_UNMAP_ADDR(mapping); - DEFINE_DMA_UNMAP_LEN(maplen); -}; - - -/* - * struct ace_skb holding the rings of skb's. This is an awful lot of - * pointers, but I don't see any other smart mode to do this in an - * efficient manner ;-( - */ -struct ace_skb -{ - struct tx_ring_info tx_skbuff[MAX_TX_RING_ENTRIES]; - struct ring_info rx_std_skbuff[RX_STD_RING_ENTRIES]; - struct ring_info rx_mini_skbuff[RX_MINI_RING_ENTRIES]; - struct ring_info rx_jumbo_skbuff[RX_JUMBO_RING_ENTRIES]; -}; - - -/* - * Struct private for the AceNIC. - * - * Elements are grouped so variables used by the tx handling goes - * together, and will go into the same cache lines etc. in order to - * avoid cache line contention between the rx and tx handling on SMP. - * - * Frequently accessed variables are put at the beginning of the - * struct to help the compiler generate better/shorter code. - */ -struct ace_private -{ - struct ace_info *info; - struct ace_regs __iomem *regs; /* register base */ - struct ace_skb *skb; - dma_addr_t info_dma; /* 32/64 bit */ - - int version, link; - int promisc, mcast_all; - - /* - * TX elements - */ - struct tx_desc *tx_ring; - u32 tx_prd; - volatile u32 tx_ret_csm; - int tx_ring_entries; - - /* - * RX elements - */ - unsigned long std_refill_busy - __attribute__ ((aligned (SMP_CACHE_BYTES))); - unsigned long mini_refill_busy, jumbo_refill_busy; - atomic_t cur_rx_bufs; - atomic_t cur_mini_bufs; - atomic_t cur_jumbo_bufs; - u32 rx_std_skbprd, rx_mini_skbprd, rx_jumbo_skbprd; - u32 cur_rx; - - struct rx_desc *rx_std_ring; - struct rx_desc *rx_jumbo_ring; - struct rx_desc *rx_mini_ring; - struct rx_desc *rx_return_ring; - - int tasklet_pending, jumbo; - struct tasklet_struct ace_tasklet; - - struct event *evt_ring; - - volatile u32 *evt_prd, *rx_ret_prd, *tx_csm; - - dma_addr_t tx_ring_dma; /* 32/64 bit */ - dma_addr_t rx_ring_base_dma; - dma_addr_t evt_ring_dma; - dma_addr_t evt_prd_dma, rx_ret_prd_dma, tx_csm_dma; - - unsigned char *trace_buf; - struct pci_dev *pdev; - struct net_device *next; - volatile int fw_running; - int board_idx; - u16 pci_command; - u8 pci_latency; - const char *name; -#ifdef INDEX_DEBUG - spinlock_t debug_lock - __attribute__ ((aligned (SMP_CACHE_BYTES))); - u32 last_tx, last_std_rx, last_mini_rx; -#endif - int pci_using_dac; - u8 firmware_major; - u8 firmware_minor; - u8 firmware_fix; - u32 firmware_start; -}; - - -#define TX_RESERVED MAX_SKB_FRAGS - -static inline int tx_space (struct ace_private *ap, u32 csm, u32 prd) -{ - return (csm - prd - 1) & (ACE_TX_RING_ENTRIES(ap) - 1); -} - -#define tx_free(ap) tx_space((ap)->tx_ret_csm, (ap)->tx_prd, ap) -#define tx_ring_full(ap, csm, prd) (tx_space(ap, csm, prd) <= TX_RESERVED) - -static inline void set_aceaddr(aceaddr *aa, dma_addr_t addr) -{ - u64 baddr = (u64) addr; - aa->addrlo = baddr & 0xffffffff; - aa->addrhi = baddr >> 32; - wmb(); -} - - -static inline void ace_set_txprd(struct ace_regs __iomem *regs, - struct ace_private *ap, u32 value) -{ -#ifdef INDEX_DEBUG - unsigned long flags; - spin_lock_irqsave(&ap->debug_lock, flags); - writel(value, ®s->TxPrd); - if (value == ap->last_tx) - printk(KERN_ERR "AceNIC RACE ALERT! writing identical value " - "to tx producer (%i)\n", value); - ap->last_tx = value; - spin_unlock_irqrestore(&ap->debug_lock, flags); -#else - writel(value, ®s->TxPrd); -#endif - wmb(); -} - - -static inline void ace_mask_irq(struct net_device *dev) -{ - struct ace_private *ap = netdev_priv(dev); - struct ace_regs __iomem *regs = ap->regs; - - if (ACE_IS_TIGON_I(ap)) - writel(1, ®s->MaskInt); - else - writel(readl(®s->HostCtrl) | MASK_INTS, ®s->HostCtrl); - - ace_sync_irq(dev->irq); -} - - -static inline void ace_unmask_irq(struct net_device *dev) -{ - struct ace_private *ap = netdev_priv(dev); - struct ace_regs __iomem *regs = ap->regs; - - if (ACE_IS_TIGON_I(ap)) - writel(0, ®s->MaskInt); - else - writel(readl(®s->HostCtrl) & ~MASK_INTS, ®s->HostCtrl); -} - - -/* - * Prototypes - */ -static int ace_init(struct net_device *dev); -static void ace_load_std_rx_ring(struct net_device *dev, int nr_bufs); -static void ace_load_mini_rx_ring(struct net_device *dev, int nr_bufs); -static void ace_load_jumbo_rx_ring(struct net_device *dev, int nr_bufs); -static irqreturn_t ace_interrupt(int irq, void *dev_id); -static int ace_load_firmware(struct net_device *dev); -static int ace_open(struct net_device *dev); -static netdev_tx_t ace_start_xmit(struct sk_buff *skb, - struct net_device *dev); -static int ace_close(struct net_device *dev); -static void ace_tasklet(unsigned long dev); -static void ace_dump_trace(struct ace_private *ap); -static void ace_set_multicast_list(struct net_device *dev); -static int ace_change_mtu(struct net_device *dev, int new_mtu); -static int ace_set_mac_addr(struct net_device *dev, void *p); -static void ace_set_rxtx_parms(struct net_device *dev, int jumbo); -static int ace_allocate_descriptors(struct net_device *dev); -static void ace_free_descriptors(struct net_device *dev); -static void ace_init_cleanup(struct net_device *dev); -static struct net_device_stats *ace_get_stats(struct net_device *dev); -static int read_eeprom_byte(struct net_device *dev, unsigned long offset); - -#endif /* _ACENIC_H_ */ diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig index cff6ef536063..1f5a32dbe04c 100644 --- a/drivers/net/ethernet/Kconfig +++ b/drivers/net/ethernet/Kconfig @@ -14,6 +14,7 @@ if ETHERNET source "drivers/net/ethernet/3com/Kconfig" source "drivers/net/ethernet/adaptec/Kconfig" source "drivers/net/ethernet/aeroflex/Kconfig" +source "drivers/net/ethernet/alteon/Kconfig" source "drivers/net/ethernet/amd/Kconfig" source "drivers/net/ethernet/apple/Kconfig" source "drivers/net/ethernet/atheros/Kconfig" diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile index 986def799cf6..c53ad3afc991 100644 --- a/drivers/net/ethernet/Makefile +++ b/drivers/net/ethernet/Makefile @@ -6,6 +6,7 @@ obj-$(CONFIG_NET_VENDOR_3COM) += 3com/ obj-$(CONFIG_NET_VENDOR_8390) += 8390/ obj-$(CONFIG_NET_VENDOR_ADAPTEC) += adaptec/ obj-$(CONFIG_GRETH) += aeroflex/ +obj-$(CONFIG_NET_VENDOR_ALTEON) += alteon/ obj-$(CONFIG_NET_VENDOR_AMD) += amd/ obj-$(CONFIG_NET_VENDOR_APPLE) += apple/ obj-$(CONFIG_NET_VENDOR_ATHEROS) += atheros/ diff --git a/drivers/net/ethernet/alteon/Kconfig b/drivers/net/ethernet/alteon/Kconfig new file mode 100644 index 000000000000..68862e4d145c --- /dev/null +++ b/drivers/net/ethernet/alteon/Kconfig @@ -0,0 +1,47 @@ +# +# Alteon network device configuration +# + +config NET_VENDOR_ALTEON + bool "Alteon devices" + depends on PCI + ---help--- + If you have a network (Ethernet) card belonging to this class, say Y + and read the Ethernet-HOWTO, available from + . + + Note that the answer to this question doesn't directly affect the + kernel: saying N will just cause the configurator to skip all + the questions about Alteon cards. If you say Y, you will be asked for + your specific card in the following questions. + +if NET_VENDOR_ALTEON + +config ACENIC + tristate "Alteon AceNIC/3Com 3C985/NetGear GA620 Gigabit support" + depends on PCI + ---help--- + Say Y here if you have an Alteon AceNIC, 3Com 3C985(B), NetGear + GA620, SGI Gigabit or Farallon PN9000-SX PCI Gigabit Ethernet + adapter. The driver allows for using the Jumbo Frame option (9000 + bytes/frame) however it requires that your switches can handle this + as well. To enable Jumbo Frames, add `mtu 9000' to your ifconfig + line. + + To compile this driver as a module, choose M here: the + module will be called acenic. + +config ACENIC_OMIT_TIGON_I + bool "Omit support for old Tigon I based AceNICs" + depends on ACENIC + ---help--- + Say Y here if you only have Tigon II based AceNICs and want to leave + out support for the older Tigon I based cards which are no longer + being sold (ie. the original Alteon AceNIC and 3Com 3C985 (non B + version)). This will reduce the size of the driver object by + app. 100KB. If you are not sure whether your card is a Tigon I or a + Tigon II, say N here. + + The safe and default value for this is N. + +endif # NET_VENDOR_ALTEON diff --git a/drivers/net/ethernet/alteon/Makefile b/drivers/net/ethernet/alteon/Makefile new file mode 100644 index 000000000000..a2ca173f2a50 --- /dev/null +++ b/drivers/net/ethernet/alteon/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for the Alteon network device drivers. +# + +obj-$(CONFIG_ACENIC) += acenic.o diff --git a/drivers/net/ethernet/alteon/acenic.c b/drivers/net/ethernet/alteon/acenic.c new file mode 100644 index 000000000000..31798f5f5d06 --- /dev/null +++ b/drivers/net/ethernet/alteon/acenic.c @@ -0,0 +1,3206 @@ +/* + * acenic.c: Linux driver for the Alteon AceNIC Gigabit Ethernet card + * and other Tigon based cards. + * + * Copyright 1998-2002 by Jes Sorensen, . + * + * Thanks to Alteon and 3Com for providing hardware and documentation + * enabling me to write this driver. + * + * A mailing list for discussing the use of this driver has been + * setup, please subscribe to the lists if you have any questions + * about the driver. Send mail to linux-acenic-help@sunsite.auc.dk to + * see how to subscribe. + * + * 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 of the License, or + * (at your option) any later version. + * + * Additional credits: + * Pete Wyckoff : Initial Linux/Alpha and trace + * dump support. The trace dump support has not been + * integrated yet however. + * Troy Benjegerdes: Big Endian (PPC) patches. + * Nate Stahl: Better out of memory handling and stats support. + * Aman Singla: Nasty race between interrupt handler and tx code dealing + * with 'testing the tx_ret_csm and setting tx_full' + * David S. Miller : conversion to new PCI dma mapping + * infrastructure and Sparc support + * Pierrick Pinasseau (CERN): For lending me an Ultra 5 to test the + * driver under Linux/Sparc64 + * Matt Domsch : Detect Alteon 1000baseT cards + * ETHTOOL_GDRVINFO support + * Chip Salzenberg : Fix race condition between tx + * handler and close() cleanup. + * Ken Aaker : Correct check for whether + * memory mapped IO is enabled to + * make the driver work on RS/6000. + * Takayoshi Kouchi : Identifying problem + * where the driver would disable + * bus master mode if it had to disable + * write and invalidate. + * Stephen Hack : Fixed ace_set_mac_addr for little + * endian systems. + * Val Henson : Reset Jumbo skb producer and + * rx producer index when + * flushing the Jumbo ring. + * Hans Grobler : Memory leak fixes in the + * driver init path. + * Grant Grundler : PCI write posting fixes. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef SIOCETHTOOL +#include +#endif + +#include +#include + +#include +#include +#include +#include +#include + + +#define DRV_NAME "acenic" + +#undef INDEX_DEBUG + +#ifdef CONFIG_ACENIC_OMIT_TIGON_I +#define ACE_IS_TIGON_I(ap) 0 +#define ACE_TX_RING_ENTRIES(ap) MAX_TX_RING_ENTRIES +#else +#define ACE_IS_TIGON_I(ap) (ap->version == 1) +#define ACE_TX_RING_ENTRIES(ap) ap->tx_ring_entries +#endif + +#ifndef PCI_VENDOR_ID_ALTEON +#define PCI_VENDOR_ID_ALTEON 0x12ae +#endif +#ifndef PCI_DEVICE_ID_ALTEON_ACENIC_FIBRE +#define PCI_DEVICE_ID_ALTEON_ACENIC_FIBRE 0x0001 +#define PCI_DEVICE_ID_ALTEON_ACENIC_COPPER 0x0002 +#endif +#ifndef PCI_DEVICE_ID_3COM_3C985 +#define PCI_DEVICE_ID_3COM_3C985 0x0001 +#endif +#ifndef PCI_VENDOR_ID_NETGEAR +#define PCI_VENDOR_ID_NETGEAR 0x1385 +#define PCI_DEVICE_ID_NETGEAR_GA620 0x620a +#endif +#ifndef PCI_DEVICE_ID_NETGEAR_GA620T +#define PCI_DEVICE_ID_NETGEAR_GA620T 0x630a +#endif + + +/* + * Farallon used the DEC vendor ID by mistake and they seem not + * to care - stinky! + */ +#ifndef PCI_DEVICE_ID_FARALLON_PN9000SX +#define PCI_DEVICE_ID_FARALLON_PN9000SX 0x1a +#endif +#ifndef PCI_DEVICE_ID_FARALLON_PN9100T +#define PCI_DEVICE_ID_FARALLON_PN9100T 0xfa +#endif +#ifndef PCI_VENDOR_ID_SGI +#define PCI_VENDOR_ID_SGI 0x10a9 +#endif +#ifndef PCI_DEVICE_ID_SGI_ACENIC +#define PCI_DEVICE_ID_SGI_ACENIC 0x0009 +#endif + +static DEFINE_PCI_DEVICE_TABLE(acenic_pci_tbl) = { + { PCI_VENDOR_ID_ALTEON, PCI_DEVICE_ID_ALTEON_ACENIC_FIBRE, + PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, + { PCI_VENDOR_ID_ALTEON, PCI_DEVICE_ID_ALTEON_ACENIC_COPPER, + PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, + { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3C985, + PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, + { PCI_VENDOR_ID_NETGEAR, PCI_DEVICE_ID_NETGEAR_GA620, + PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, + { PCI_VENDOR_ID_NETGEAR, PCI_DEVICE_ID_NETGEAR_GA620T, + PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, + /* + * Farallon used the DEC vendor ID on their cards incorrectly, + * then later Alteon's ID. + */ + { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_FARALLON_PN9000SX, + PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, + { PCI_VENDOR_ID_ALTEON, PCI_DEVICE_ID_FARALLON_PN9100T, + PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, + { PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_ACENIC, + PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, }, + { } +}; +MODULE_DEVICE_TABLE(pci, acenic_pci_tbl); + +#define ace_sync_irq(irq) synchronize_irq(irq) + +#ifndef offset_in_page +#define offset_in_page(ptr) ((unsigned long)(ptr) & ~PAGE_MASK) +#endif + +#define ACE_MAX_MOD_PARMS 8 +#define BOARD_IDX_STATIC 0 +#define BOARD_IDX_OVERFLOW -1 + +#include "acenic.h" + +/* + * These must be defined before the firmware is included. + */ +#define MAX_TEXT_LEN 96*1024 +#define MAX_RODATA_LEN 8*1024 +#define MAX_DATA_LEN 2*1024 + +#ifndef tigon2FwReleaseLocal +#define tigon2FwReleaseLocal 0 +#endif + +/* + * This driver currently supports Tigon I and Tigon II based cards + * including the Alteon AceNIC, the 3Com 3C985[B] and NetGear + * GA620. The driver should also work on the SGI, DEC and Farallon + * versions of the card, however I have not been able to test that + * myself. + * + * This card is really neat, it supports receive hardware checksumming + * and jumbo frames (up to 9000 bytes) and does a lot of work in the + * firmware. Also the programming interface is quite neat, except for + * the parts dealing with the i2c eeprom on the card ;-) + * + * Using jumbo frames: + * + * To enable jumbo frames, simply specify an mtu between 1500 and 9000 + * bytes to ifconfig. Jumbo frames can be enabled or disabled at any time + * by running `ifconfig eth mtu ' with being the Ethernet + * interface number and being the MTU value. + * + * Module parameters: + * + * When compiled as a loadable module, the driver allows for a number + * of module parameters to be specified. The driver supports the + * following module parameters: + * + * trace= - Firmware trace level. This requires special traced + * firmware to replace the firmware supplied with + * the driver - for debugging purposes only. + * + * link= - Link state. Normally you want to use the default link + * parameters set by the driver. This can be used to + * override these in case your switch doesn't negotiate + * the link properly. Valid values are: + * 0x0001 - Force half duplex link. + * 0x0002 - Do not negotiate line speed with the other end. + * 0x0010 - 10Mbit/sec link. + * 0x0020 - 100Mbit/sec link. + * 0x0040 - 1000Mbit/sec link. + * 0x0100 - Do not negotiate flow control. + * 0x0200 - Enable RX flow control Y + * 0x0400 - Enable TX flow control Y (Tigon II NICs only). + * Default value is 0x0270, ie. enable link+flow + * control negotiation. Negotiating the highest + * possible link speed with RX flow control enabled. + * + * When disabling link speed negotiation, only one link + * speed is allowed to be specified! + * + * tx_coal_tick= - number of coalescing clock ticks (us) allowed + * to wait for more packets to arive before + * interrupting the host, from the time the first + * packet arrives. + * + * rx_coal_tick= - number of coalescing clock ticks (us) allowed + * to wait for more packets to arive in the transmit ring, + * before interrupting the host, after transmitting the + * first packet in the ring. + * + * max_tx_desc= - maximum number of transmit descriptors + * (packets) transmitted before interrupting the host. + * + * max_rx_desc= - maximum number of receive descriptors + * (packets) received before interrupting the host. + * + * tx_ratio= - 7 bit value (0 - 63) specifying the split in 64th + * increments of the NIC's on board memory to be used for + * transmit and receive buffers. For the 1MB NIC app. 800KB + * is available, on the 1/2MB NIC app. 300KB is available. + * 68KB will always be available as a minimum for both + * directions. The default value is a 50/50 split. + * dis_pci_mem_inval= - disable PCI memory write and invalidate + * operations, default (1) is to always disable this as + * that is what Alteon does on NT. I have not been able + * to measure any real performance differences with + * this on my systems. Set =0 if you want to + * enable these operations. + * + * If you use more than one NIC, specify the parameters for the + * individual NICs with a comma, ie. trace=0,0x00001fff,0 you want to + * run tracing on NIC #2 but not on NIC #1 and #3. + * + * TODO: + * + * - Proper multicast support. + * - NIC dump support. + * - More tuning parameters. + * + * The mini ring is not used under Linux and I am not sure it makes sense + * to actually use it. + * + * New interrupt handler strategy: + * + * The old interrupt handler worked using the traditional method of + * replacing an skbuff with a new one when a packet arrives. However + * the rx rings do not need to contain a static number of buffer + * descriptors, thus it makes sense to move the memory allocation out + * of the main interrupt handler and do it in a bottom half handler + * and only allocate new buffers when the number of buffers in the + * ring is below a certain threshold. In order to avoid starving the + * NIC under heavy load it is however necessary to force allocation + * when hitting a minimum threshold. The strategy for alloction is as + * follows: + * + * RX_LOW_BUF_THRES - allocate buffers in the bottom half + * RX_PANIC_LOW_THRES - we are very low on buffers, allocate + * the buffers in the interrupt handler + * RX_RING_THRES - maximum number of buffers in the rx ring + * RX_MINI_THRES - maximum number of buffers in the mini ring + * RX_JUMBO_THRES - maximum number of buffers in the jumbo ring + * + * One advantagous side effect of this allocation approach is that the + * entire rx processing can be done without holding any spin lock + * since the rx rings and registers are totally independent of the tx + * ring and its registers. This of course includes the kmalloc's of + * new skb's. Thus start_xmit can run in parallel with rx processing + * and the memory allocation on SMP systems. + * + * Note that running the skb reallocation in a bottom half opens up + * another can of races which needs to be handled properly. In + * particular it can happen that the interrupt handler tries to run + * the reallocation while the bottom half is either running on another + * CPU or was interrupted on the same CPU. To get around this the + * driver uses bitops to prevent the reallocation routines from being + * reentered. + * + * TX handling can also be done without holding any spin lock, wheee + * this is fun! since tx_ret_csm is only written to by the interrupt + * handler. The case to be aware of is when shutting down the device + * and cleaning up where it is necessary to make sure that + * start_xmit() is not running while this is happening. Well DaveM + * informs me that this case is already protected against ... bye bye + * Mr. Spin Lock, it was nice to know you. + * + * TX interrupts are now partly disabled so the NIC will only generate + * TX interrupts for the number of coal ticks, not for the number of + * TX packets in the queue. This should reduce the number of TX only, + * ie. when no RX processing is done, interrupts seen. + */ + +/* + * Threshold values for RX buffer allocation - the low water marks for + * when to start refilling the rings are set to 75% of the ring + * sizes. It seems to make sense to refill the rings entirely from the + * intrrupt handler once it gets below the panic threshold, that way + * we don't risk that the refilling is moved to another CPU when the + * one running the interrupt handler just got the slab code hot in its + * cache. + */ +#define RX_RING_SIZE 72 +#define RX_MINI_SIZE 64 +#define RX_JUMBO_SIZE 48 + +#define RX_PANIC_STD_THRES 16 +#define RX_PANIC_STD_REFILL (3*RX_PANIC_STD_THRES)/2 +#define RX_LOW_STD_THRES (3*RX_RING_SIZE)/4 +#define RX_PANIC_MINI_THRES 12 +#define RX_PANIC_MINI_REFILL (3*RX_PANIC_MINI_THRES)/2 +#define RX_LOW_MINI_THRES (3*RX_MINI_SIZE)/4 +#define RX_PANIC_JUMBO_THRES 6 +#define RX_PANIC_JUMBO_REFILL (3*RX_PANIC_JUMBO_THRES)/2 +#define RX_LOW_JUMBO_THRES (3*RX_JUMBO_SIZE)/4 + + +/* + * Size of the mini ring entries, basically these just should be big + * enough to take TCP ACKs + */ +#define ACE_MINI_SIZE 100 + +#define ACE_MINI_BUFSIZE ACE_MINI_SIZE +#define ACE_STD_BUFSIZE (ACE_STD_MTU + ETH_HLEN + 4) +#define ACE_JUMBO_BUFSIZE (ACE_JUMBO_MTU + ETH_HLEN + 4) + +/* + * There seems to be a magic difference in the effect between 995 and 996 + * but little difference between 900 and 995 ... no idea why. + * + * There is now a default set of tuning parameters which is set, depending + * on whether or not the user enables Jumbo frames. It's assumed that if + * Jumbo frames are enabled, the user wants optimal tuning for that case. + */ +#define DEF_TX_COAL 400 /* 996 */ +#define DEF_TX_MAX_DESC 60 /* was 40 */ +#define DEF_RX_COAL 120 /* 1000 */ +#define DEF_RX_MAX_DESC 25 +#define DEF_TX_RATIO 21 /* 24 */ + +#define DEF_JUMBO_TX_COAL 20 +#define DEF_JUMBO_TX_MAX_DESC 60 +#define DEF_JUMBO_RX_COAL 30 +#define DEF_JUMBO_RX_MAX_DESC 6 +#define DEF_JUMBO_TX_RATIO 21 + +#if tigon2FwReleaseLocal < 20001118 +/* + * Standard firmware and early modifications duplicate + * IRQ load without this flag (coal timer is never reset). + * Note that with this flag tx_coal should be less than + * time to xmit full tx ring. + * 400usec is not so bad for tx ring size of 128. + */ +#define TX_COAL_INTS_ONLY 1 /* worth it */ +#else +/* + * With modified firmware, this is not necessary, but still useful. + */ +#define TX_COAL_INTS_ONLY 1 +#endif + +#define DEF_TRACE 0 +#define DEF_STAT (2 * TICKS_PER_SEC) + + +static int link_state[ACE_MAX_MOD_PARMS]; +static int trace[ACE_MAX_MOD_PARMS]; +static int tx_coal_tick[ACE_MAX_MOD_PARMS]; +static int rx_coal_tick[ACE_MAX_MOD_PARMS]; +static int max_tx_desc[ACE_MAX_MOD_PARMS]; +static int max_rx_desc[ACE_MAX_MOD_PARMS]; +static int tx_ratio[ACE_MAX_MOD_PARMS]; +static int dis_pci_mem_inval[ACE_MAX_MOD_PARMS] = {1, 1, 1, 1, 1, 1, 1, 1}; + +MODULE_AUTHOR("Jes Sorensen "); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("AceNIC/3C985/GA620 Gigabit Ethernet driver"); +#ifndef CONFIG_ACENIC_OMIT_TIGON_I +MODULE_FIRMWARE("acenic/tg1.bin"); +#endif +MODULE_FIRMWARE("acenic/tg2.bin"); + +module_param_array_named(link, link_state, int, NULL, 0); +module_param_array(trace, int, NULL, 0); +module_param_array(tx_coal_tick, int, NULL, 0); +module_param_array(max_tx_desc, int, NULL, 0); +module_param_array(rx_coal_tick, int, NULL, 0); +module_param_array(max_rx_desc, int, NULL, 0); +module_param_array(tx_ratio, int, NULL, 0); +MODULE_PARM_DESC(link, "AceNIC/3C985/NetGear link state"); +MODULE_PARM_DESC(trace, "AceNIC/3C985/NetGear firmware trace level"); +MODULE_PARM_DESC(tx_coal_tick, "AceNIC/3C985/GA620 max clock ticks to wait from first tx descriptor arrives"); +MODULE_PARM_DESC(max_tx_desc, "AceNIC/3C985/GA620 max number of transmit descriptors to wait"); +MODULE_PARM_DESC(rx_coal_tick, "AceNIC/3C985/GA620 max clock ticks to wait from first rx descriptor arrives"); +MODULE_PARM_DESC(max_rx_desc, "AceNIC/3C985/GA620 max number of receive descriptors to wait"); +MODULE_PARM_DESC(tx_ratio, "AceNIC/3C985/GA620 ratio of NIC memory used for TX/RX descriptors (range 0-63)"); + + +static const char version[] __devinitconst = + "acenic.c: v0.92 08/05/2002 Jes Sorensen, linux-acenic@SunSITE.dk\n" + " http://home.cern.ch/~jes/gige/acenic.html\n"; + +static int ace_get_settings(struct net_device *, struct ethtool_cmd *); +static int ace_set_settings(struct net_device *, struct ethtool_cmd *); +static void ace_get_drvinfo(struct net_device *, struct ethtool_drvinfo *); + +static const struct ethtool_ops ace_ethtool_ops = { + .get_settings = ace_get_settings, + .set_settings = ace_set_settings, + .get_drvinfo = ace_get_drvinfo, +}; + +static void ace_watchdog(struct net_device *dev); + +static const struct net_device_ops ace_netdev_ops = { + .ndo_open = ace_open, + .ndo_stop = ace_close, + .ndo_tx_timeout = ace_watchdog, + .ndo_get_stats = ace_get_stats, + .ndo_start_xmit = ace_start_xmit, + .ndo_set_multicast_list = ace_set_multicast_list, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_mac_address = ace_set_mac_addr, + .ndo_change_mtu = ace_change_mtu, +}; + +static int __devinit acenic_probe_one(struct pci_dev *pdev, + const struct pci_device_id *id) +{ + struct net_device *dev; + struct ace_private *ap; + static int boards_found; + + dev = alloc_etherdev(sizeof(struct ace_private)); + if (dev == NULL) { + printk(KERN_ERR "acenic: Unable to allocate " + "net_device structure!\n"); + return -ENOMEM; + } + + SET_NETDEV_DEV(dev, &pdev->dev); + + ap = netdev_priv(dev); + ap->pdev = pdev; + ap->name = pci_name(pdev); + + dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM; + dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX; + + dev->watchdog_timeo = 5*HZ; + + dev->netdev_ops = &ace_netdev_ops; + SET_ETHTOOL_OPS(dev, &ace_ethtool_ops); + + /* we only display this string ONCE */ + if (!boards_found) + printk(version); + + if (pci_enable_device(pdev)) + goto fail_free_netdev; + + /* + * Enable master mode before we start playing with the + * pci_command word since pci_set_master() will modify + * it. + */ + pci_set_master(pdev); + + pci_read_config_word(pdev, PCI_COMMAND, &ap->pci_command); + + /* OpenFirmware on Mac's does not set this - DOH.. */ + if (!(ap->pci_command & PCI_COMMAND_MEMORY)) { + printk(KERN_INFO "%s: Enabling PCI Memory Mapped " + "access - was not enabled by BIOS/Firmware\n", + ap->name); + ap->pci_command = ap->pci_command | PCI_COMMAND_MEMORY; + pci_write_config_word(ap->pdev, PCI_COMMAND, + ap->pci_command); + wmb(); + } + + pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &ap->pci_latency); + if (ap->pci_latency <= 0x40) { + ap->pci_latency = 0x40; + pci_write_config_byte(pdev, PCI_LATENCY_TIMER, ap->pci_latency); + } + + /* + * Remap the regs into kernel space - this is abuse of + * dev->base_addr since it was means for I/O port + * addresses but who gives a damn. + */ + dev->base_addr = pci_resource_start(pdev, 0); + ap->regs = ioremap(dev->base_addr, 0x4000); + if (!ap->regs) { + printk(KERN_ERR "%s: Unable to map I/O register, " + "AceNIC %i will be disabled.\n", + ap->name, boards_found); + goto fail_free_netdev; + } + + switch(pdev->vendor) { + case PCI_VENDOR_ID_ALTEON: + if (pdev->device == PCI_DEVICE_ID_FARALLON_PN9100T) { + printk(KERN_INFO "%s: Farallon PN9100-T ", + ap->name); + } else { + printk(KERN_INFO "%s: Alteon AceNIC ", + ap->name); + } + break; + case PCI_VENDOR_ID_3COM: + printk(KERN_INFO "%s: 3Com 3C985 ", ap->name); + break; + case PCI_VENDOR_ID_NETGEAR: + printk(KERN_INFO "%s: NetGear GA620 ", ap->name); + break; + case PCI_VENDOR_ID_DEC: + if (pdev->device == PCI_DEVICE_ID_FARALLON_PN9000SX) { + printk(KERN_INFO "%s: Farallon PN9000-SX ", + ap->name); + break; + } + case PCI_VENDOR_ID_SGI: + printk(KERN_INFO "%s: SGI AceNIC ", ap->name); + break; + default: + printk(KERN_INFO "%s: Unknown AceNIC ", ap->name); + break; + } + + printk("Gigabit Ethernet at 0x%08lx, ", dev->base_addr); + printk("irq %d\n", pdev->irq); + +#ifdef CONFIG_ACENIC_OMIT_TIGON_I + if ((readl(&ap->regs->HostCtrl) >> 28) == 4) { + printk(KERN_ERR "%s: Driver compiled without Tigon I" + " support - NIC disabled\n", dev->name); + goto fail_uninit; + } +#endif + + if (ace_allocate_descriptors(dev)) + goto fail_free_netdev; + +#ifdef MODULE + if (boards_found >= ACE_MAX_MOD_PARMS) + ap->board_idx = BOARD_IDX_OVERFLOW; + else + ap->board_idx = boards_found; +#else + ap->board_idx = BOARD_IDX_STATIC; +#endif + + if (ace_init(dev)) + goto fail_free_netdev; + + if (register_netdev(dev)) { + printk(KERN_ERR "acenic: device registration failed\n"); + goto fail_uninit; + } + ap->name = dev->name; + + if (ap->pci_using_dac) + dev->features |= NETIF_F_HIGHDMA; + + pci_set_drvdata(pdev, dev); + + boards_found++; + return 0; + + fail_uninit: + ace_init_cleanup(dev); + fail_free_netdev: + free_netdev(dev); + return -ENODEV; +} + +static void __devexit acenic_remove_one(struct pci_dev *pdev) +{ + struct net_device *dev = pci_get_drvdata(pdev); + struct ace_private *ap = netdev_priv(dev); + struct ace_regs __iomem *regs = ap->regs; + short i; + + unregister_netdev(dev); + + writel(readl(®s->CpuCtrl) | CPU_HALT, ®s->CpuCtrl); + if (ap->version >= 2) + writel(readl(®s->CpuBCtrl) | CPU_HALT, ®s->CpuBCtrl); + + /* + * This clears any pending interrupts + */ + writel(1, ®s->Mb0Lo); + readl(®s->CpuCtrl); /* flush */ + + /* + * Make sure no other CPUs are processing interrupts + * on the card before the buffers are being released. + * Otherwise one might experience some `interesting' + * effects. + * + * Then release the RX buffers - jumbo buffers were + * already released in ace_close(). + */ + ace_sync_irq(dev->irq); + + for (i = 0; i < RX_STD_RING_ENTRIES; i++) { + struct sk_buff *skb = ap->skb->rx_std_skbuff[i].skb; + + if (skb) { + struct ring_info *ringp; + dma_addr_t mapping; + + ringp = &ap->skb->rx_std_skbuff[i]; + mapping = dma_unmap_addr(ringp, mapping); + pci_unmap_page(ap->pdev, mapping, + ACE_STD_BUFSIZE, + PCI_DMA_FROMDEVICE); + + ap->rx_std_ring[i].size = 0; + ap->skb->rx_std_skbuff[i].skb = NULL; + dev_kfree_skb(skb); + } + } + + if (ap->version >= 2) { + for (i = 0; i < RX_MINI_RING_ENTRIES; i++) { + struct sk_buff *skb = ap->skb->rx_mini_skbuff[i].skb; + + if (skb) { + struct ring_info *ringp; + dma_addr_t mapping; + + ringp = &ap->skb->rx_mini_skbuff[i]; + mapping = dma_unmap_addr(ringp,mapping); + pci_unmap_page(ap->pdev, mapping, + ACE_MINI_BUFSIZE, + PCI_DMA_FROMDEVICE); + + ap->rx_mini_ring[i].size = 0; + ap->skb->rx_mini_skbuff[i].skb = NULL; + dev_kfree_skb(skb); + } + } + } + + for (i = 0; i < RX_JUMBO_RING_ENTRIES; i++) { + struct sk_buff *skb = ap->skb->rx_jumbo_skbuff[i].skb; + if (skb) { + struct ring_info *ringp; + dma_addr_t mapping; + + ringp = &ap->skb->rx_jumbo_skbuff[i]; + mapping = dma_unmap_addr(ringp, mapping); + pci_unmap_page(ap->pdev, mapping, + ACE_JUMBO_BUFSIZE, + PCI_DMA_FROMDEVICE); + + ap->rx_jumbo_ring[i].size = 0; + ap->skb->rx_jumbo_skbuff[i].skb = NULL; + dev_kfree_skb(skb); + } + } + + ace_init_cleanup(dev); + free_netdev(dev); +} + +static struct pci_driver acenic_pci_driver = { + .name = "acenic", + .id_table = acenic_pci_tbl, + .probe = acenic_probe_one, + .remove = __devexit_p(acenic_remove_one), +}; + +static int __init acenic_init(void) +{ + return pci_register_driver(&acenic_pci_driver); +} + +static void __exit acenic_exit(void) +{ + pci_unregister_driver(&acenic_pci_driver); +} + +module_init(acenic_init); +module_exit(acenic_exit); + +static void ace_free_descriptors(struct net_device *dev) +{ + struct ace_private *ap = netdev_priv(dev); + int size; + + if (ap->rx_std_ring != NULL) { + size = (sizeof(struct rx_desc) * + (RX_STD_RING_ENTRIES + + RX_JUMBO_RING_ENTRIES + + RX_MINI_RING_ENTRIES + + RX_RETURN_RING_ENTRIES)); + pci_free_consistent(ap->pdev, size, ap->rx_std_ring, + ap->rx_ring_base_dma); + ap->rx_std_ring = NULL; + ap->rx_jumbo_ring = NULL; + ap->rx_mini_ring = NULL; + ap->rx_return_ring = NULL; + } + if (ap->evt_ring != NULL) { + size = (sizeof(struct event) * EVT_RING_ENTRIES); + pci_free_consistent(ap->pdev, size, ap->evt_ring, + ap->evt_ring_dma); + ap->evt_ring = NULL; + } + if (ap->tx_ring != NULL && !ACE_IS_TIGON_I(ap)) { + size = (sizeof(struct tx_desc) * MAX_TX_RING_ENTRIES); + pci_free_consistent(ap->pdev, size, ap->tx_ring, + ap->tx_ring_dma); + } + ap->tx_ring = NULL; + + if (ap->evt_prd != NULL) { + pci_free_consistent(ap->pdev, sizeof(u32), + (void *)ap->evt_prd, ap->evt_prd_dma); + ap->evt_prd = NULL; + } + if (ap->rx_ret_prd != NULL) { + pci_free_consistent(ap->pdev, sizeof(u32), + (void *)ap->rx_ret_prd, + ap->rx_ret_prd_dma); + ap->rx_ret_prd = NULL; + } + if (ap->tx_csm != NULL) { + pci_free_consistent(ap->pdev, sizeof(u32), + (void *)ap->tx_csm, ap->tx_csm_dma); + ap->tx_csm = NULL; + } +} + + +static int ace_allocate_descriptors(struct net_device *dev) +{ + struct ace_private *ap = netdev_priv(dev); + int size; + + size = (sizeof(struct rx_desc) * + (RX_STD_RING_ENTRIES + + RX_JUMBO_RING_ENTRIES + + RX_MINI_RING_ENTRIES + + RX_RETURN_RING_ENTRIES)); + + ap->rx_std_ring = pci_alloc_consistent(ap->pdev, size, + &ap->rx_ring_base_dma); + if (ap->rx_std_ring == NULL) + goto fail; + + ap->rx_jumbo_ring = ap->rx_std_ring + RX_STD_RING_ENTRIES; + ap->rx_mini_ring = ap->rx_jumbo_ring + RX_JUMBO_RING_ENTRIES; + ap->rx_return_ring = ap->rx_mini_ring + RX_MINI_RING_ENTRIES; + + size = (sizeof(struct event) * EVT_RING_ENTRIES); + + ap->evt_ring = pci_alloc_consistent(ap->pdev, size, &ap->evt_ring_dma); + + if (ap->evt_ring == NULL) + goto fail; + + /* + * Only allocate a host TX ring for the Tigon II, the Tigon I + * has to use PCI registers for this ;-( + */ + if (!ACE_IS_TIGON_I(ap)) { + size = (sizeof(struct tx_desc) * MAX_TX_RING_ENTRIES); + + ap->tx_ring = pci_alloc_consistent(ap->pdev, size, + &ap->tx_ring_dma); + + if (ap->tx_ring == NULL) + goto fail; + } + + ap->evt_prd = pci_alloc_consistent(ap->pdev, sizeof(u32), + &ap->evt_prd_dma); + if (ap->evt_prd == NULL) + goto fail; + + ap->rx_ret_prd = pci_alloc_consistent(ap->pdev, sizeof(u32), + &ap->rx_ret_prd_dma); + if (ap->rx_ret_prd == NULL) + goto fail; + + ap->tx_csm = pci_alloc_consistent(ap->pdev, sizeof(u32), + &ap->tx_csm_dma); + if (ap->tx_csm == NULL) + goto fail; + + return 0; + +fail: + /* Clean up. */ + ace_init_cleanup(dev); + return 1; +} + + +/* + * Generic cleanup handling data allocated during init. Used when the + * module is unloaded or if an error occurs during initialization + */ +static void ace_init_cleanup(struct net_device *dev) +{ + struct ace_private *ap; + + ap = netdev_priv(dev); + + ace_free_descriptors(dev); + + if (ap->info) + pci_free_consistent(ap->pdev, sizeof(struct ace_info), + ap->info, ap->info_dma); + kfree(ap->skb); + kfree(ap->trace_buf); + + if (dev->irq) + free_irq(dev->irq, dev); + + iounmap(ap->regs); +} + + +/* + * Commands are considered to be slow. + */ +static inline void ace_issue_cmd(struct ace_regs __iomem *regs, struct cmd *cmd) +{ + u32 idx; + + idx = readl(®s->CmdPrd); + + writel(*(u32 *)(cmd), ®s->CmdRng[idx]); + idx = (idx + 1) % CMD_RING_ENTRIES; + + writel(idx, ®s->CmdPrd); +} + + +static int __devinit ace_init(struct net_device *dev) +{ + struct ace_private *ap; + struct ace_regs __iomem *regs; + struct ace_info *info = NULL; + struct pci_dev *pdev; + unsigned long myjif; + u64 tmp_ptr; + u32 tig_ver, mac1, mac2, tmp, pci_state; + int board_idx, ecode = 0; + short i; + unsigned char cache_size; + + ap = netdev_priv(dev); + regs = ap->regs; + + board_idx = ap->board_idx; + + /* + * aman@sgi.com - its useful to do a NIC reset here to + * address the `Firmware not running' problem subsequent + * to any crashes involving the NIC + */ + writel(HW_RESET | (HW_RESET << 24), ®s->HostCtrl); + readl(®s->HostCtrl); /* PCI write posting */ + udelay(5); + + /* + * Don't access any other registers before this point! + */ +#ifdef __BIG_ENDIAN + /* + * This will most likely need BYTE_SWAP once we switch + * to using __raw_writel() + */ + writel((WORD_SWAP | CLR_INT | ((WORD_SWAP | CLR_INT) << 24)), + ®s->HostCtrl); +#else + writel((CLR_INT | WORD_SWAP | ((CLR_INT | WORD_SWAP) << 24)), + ®s->HostCtrl); +#endif + readl(®s->HostCtrl); /* PCI write posting */ + + /* + * Stop the NIC CPU and clear pending interrupts + */ + writel(readl(®s->CpuCtrl) | CPU_HALT, ®s->CpuCtrl); + readl(®s->CpuCtrl); /* PCI write posting */ + writel(0, ®s->Mb0Lo); + + tig_ver = readl(®s->HostCtrl) >> 28; + + switch(tig_ver){ +#ifndef CONFIG_ACENIC_OMIT_TIGON_I + case 4: + case 5: + printk(KERN_INFO " Tigon I (Rev. %i), Firmware: %i.%i.%i, ", + tig_ver, ap->firmware_major, ap->firmware_minor, + ap->firmware_fix); + writel(0, ®s->LocalCtrl); + ap->version = 1; + ap->tx_ring_entries = TIGON_I_TX_RING_ENTRIES; + break; +#endif + case 6: + printk(KERN_INFO " Tigon II (Rev. %i), Firmware: %i.%i.%i, ", + tig_ver, ap->firmware_major, ap->firmware_minor, + ap->firmware_fix); + writel(readl(®s->CpuBCtrl) | CPU_HALT, ®s->CpuBCtrl); + readl(®s->CpuBCtrl); /* PCI write posting */ + /* + * The SRAM bank size does _not_ indicate the amount + * of memory on the card, it controls the _bank_ size! + * Ie. a 1MB AceNIC will have two banks of 512KB. + */ + writel(SRAM_BANK_512K, ®s->LocalCtrl); + writel(SYNC_SRAM_TIMING, ®s->MiscCfg); + ap->version = 2; + ap->tx_ring_entries = MAX_TX_RING_ENTRIES; + break; + default: + printk(KERN_WARNING " Unsupported Tigon version detected " + "(%i)\n", tig_ver); + ecode = -ENODEV; + goto init_error; + } + + /* + * ModeStat _must_ be set after the SRAM settings as this change + * seems to corrupt the ModeStat and possible other registers. + * The SRAM settings survive resets and setting it to the same + * value a second time works as well. This is what caused the + * `Firmware not running' problem on the Tigon II. + */ +#ifdef __BIG_ENDIAN + writel(ACE_BYTE_SWAP_DMA | ACE_WARN | ACE_FATAL | ACE_BYTE_SWAP_BD | + ACE_WORD_SWAP_BD | ACE_NO_JUMBO_FRAG, ®s->ModeStat); +#else + writel(ACE_BYTE_SWAP_DMA | ACE_WARN | ACE_FATAL | + ACE_WORD_SWAP_BD | ACE_NO_JUMBO_FRAG, ®s->ModeStat); +#endif + readl(®s->ModeStat); /* PCI write posting */ + + mac1 = 0; + for(i = 0; i < 4; i++) { + int t; + + mac1 = mac1 << 8; + t = read_eeprom_byte(dev, 0x8c+i); + if (t < 0) { + ecode = -EIO; + goto init_error; + } else + mac1 |= (t & 0xff); + } + mac2 = 0; + for(i = 4; i < 8; i++) { + int t; + + mac2 = mac2 << 8; + t = read_eeprom_byte(dev, 0x8c+i); + if (t < 0) { + ecode = -EIO; + goto init_error; + } else + mac2 |= (t & 0xff); + } + + writel(mac1, ®s->MacAddrHi); + writel(mac2, ®s->MacAddrLo); + + dev->dev_addr[0] = (mac1 >> 8) & 0xff; + dev->dev_addr[1] = mac1 & 0xff; + dev->dev_addr[2] = (mac2 >> 24) & 0xff; + dev->dev_addr[3] = (mac2 >> 16) & 0xff; + dev->dev_addr[4] = (mac2 >> 8) & 0xff; + dev->dev_addr[5] = mac2 & 0xff; + + printk("MAC: %pM\n", dev->dev_addr); + + /* + * Looks like this is necessary to deal with on all architectures, + * even this %$#%$# N440BX Intel based thing doesn't get it right. + * Ie. having two NICs in the machine, one will have the cache + * line set at boot time, the other will not. + */ + pdev = ap->pdev; + pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_size); + cache_size <<= 2; + if (cache_size != SMP_CACHE_BYTES) { + printk(KERN_INFO " PCI cache line size set incorrectly " + "(%i bytes) by BIOS/FW, ", cache_size); + if (cache_size > SMP_CACHE_BYTES) + printk("expecting %i\n", SMP_CACHE_BYTES); + else { + printk("correcting to %i\n", SMP_CACHE_BYTES); + pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, + SMP_CACHE_BYTES >> 2); + } + } + + pci_state = readl(®s->PciState); + printk(KERN_INFO " PCI bus width: %i bits, speed: %iMHz, " + "latency: %i clks\n", + (pci_state & PCI_32BIT) ? 32 : 64, + (pci_state & PCI_66MHZ) ? 66 : 33, + ap->pci_latency); + + /* + * Set the max DMA transfer size. Seems that for most systems + * the performance is better when no MAX parameter is + * set. However for systems enabling PCI write and invalidate, + * DMA writes must be set to the L1 cache line size to get + * optimal performance. + * + * The default is now to turn the PCI write and invalidate off + * - that is what Alteon does for NT. + */ + tmp = READ_CMD_MEM | WRITE_CMD_MEM; + if (ap->version >= 2) { + tmp |= (MEM_READ_MULTIPLE | (pci_state & PCI_66MHZ)); + /* + * Tuning parameters only supported for 8 cards + */ + if (board_idx == BOARD_IDX_OVERFLOW || + dis_pci_mem_inval[board_idx]) { + if (ap->pci_command & PCI_COMMAND_INVALIDATE) { + ap->pci_command &= ~PCI_COMMAND_INVALIDATE; + pci_write_config_word(pdev, PCI_COMMAND, + ap->pci_command); + printk(KERN_INFO " Disabling PCI memory " + "write and invalidate\n"); + } + } else if (ap->pci_command & PCI_COMMAND_INVALIDATE) { + printk(KERN_INFO " PCI memory write & invalidate " + "enabled by BIOS, enabling counter measures\n"); + + switch(SMP_CACHE_BYTES) { + case 16: + tmp |= DMA_WRITE_MAX_16; + break; + case 32: + tmp |= DMA_WRITE_MAX_32; + break; + case 64: + tmp |= DMA_WRITE_MAX_64; + break; + case 128: + tmp |= DMA_WRITE_MAX_128; + break; + default: + printk(KERN_INFO " Cache line size %i not " + "supported, PCI write and invalidate " + "disabled\n", SMP_CACHE_BYTES); + ap->pci_command &= ~PCI_COMMAND_INVALIDATE; + pci_write_config_word(pdev, PCI_COMMAND, + ap->pci_command); + } + } + } + +#ifdef __sparc__ + /* + * On this platform, we know what the best dma settings + * are. We use 64-byte maximum bursts, because if we + * burst larger than the cache line size (or even cross + * a 64byte boundary in a single burst) the UltraSparc + * PCI controller will disconnect at 64-byte multiples. + * + * Read-multiple will be properly enabled above, and when + * set will give the PCI controller proper hints about + * prefetching. + */ + tmp &= ~DMA_READ_WRITE_MASK; + tmp |= DMA_READ_MAX_64; + tmp |= DMA_WRITE_MAX_64; +#endif +#ifdef __alpha__ + tmp &= ~DMA_READ_WRITE_MASK; + tmp |= DMA_READ_MAX_128; + /* + * All the docs say MUST NOT. Well, I did. + * Nothing terrible happens, if we load wrong size. + * Bit w&i still works better! + */ + tmp |= DMA_WRITE_MAX_128; +#endif + writel(tmp, ®s->PciState); + +#if 0 + /* + * The Host PCI bus controller driver has to set FBB. + * If all devices on that PCI bus support FBB, then the controller + * can enable FBB support in the Host PCI Bus controller (or on + * the PCI-PCI bridge if that applies). + * -ggg + */ + /* + * I have received reports from people having problems when this + * bit is enabled. + */ + if (!(ap->pci_command & PCI_COMMAND_FAST_BACK)) { + printk(KERN_INFO " Enabling PCI Fast Back to Back\n"); + ap->pci_command |= PCI_COMMAND_FAST_BACK; + pci_write_config_word(pdev, PCI_COMMAND, ap->pci_command); + } +#endif + + /* + * Configure DMA attributes. + */ + if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) { + ap->pci_using_dac = 1; + } else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) { + ap->pci_using_dac = 0; + } else { + ecode = -ENODEV; + goto init_error; + } + + /* + * Initialize the generic info block and the command+event rings + * and the control blocks for the transmit and receive rings + * as they need to be setup once and for all. + */ + if (!(info = pci_alloc_consistent(ap->pdev, sizeof(struct ace_info), + &ap->info_dma))) { + ecode = -EAGAIN; + goto init_error; + } + ap->info = info; + + /* + * Get the memory for the skb rings. + */ + if (!(ap->skb = kmalloc(sizeof(struct ace_skb), GFP_KERNEL))) { + ecode = -EAGAIN; + goto init_error; + } + + ecode = request_irq(pdev->irq, ace_interrupt, IRQF_SHARED, + DRV_NAME, dev); + if (ecode) { + printk(KERN_WARNING "%s: Requested IRQ %d is busy\n", + DRV_NAME, pdev->irq); + goto init_error; + } else + dev->irq = pdev->irq; + +#ifdef INDEX_DEBUG + spin_lock_init(&ap->debug_lock); + ap->last_tx = ACE_TX_RING_ENTRIES(ap) - 1; + ap->last_std_rx = 0; + ap->last_mini_rx = 0; +#endif + + memset(ap->info, 0, sizeof(struct ace_info)); + memset(ap->skb, 0, sizeof(struct ace_skb)); + + ecode = ace_load_firmware(dev); + if (ecode) + goto init_error; + + ap->fw_running = 0; + + tmp_ptr = ap->info_dma; + writel(tmp_ptr >> 32, ®s->InfoPtrHi); + writel(tmp_ptr & 0xffffffff, ®s->InfoPtrLo); + + memset(ap->evt_ring, 0, EVT_RING_ENTRIES * sizeof(struct event)); + + set_aceaddr(&info->evt_ctrl.rngptr, ap->evt_ring_dma); + info->evt_ctrl.flags = 0; + + *(ap->evt_prd) = 0; + wmb(); + set_aceaddr(&info->evt_prd_ptr, ap->evt_prd_dma); + writel(0, ®s->EvtCsm); + + set_aceaddr(&info->cmd_ctrl.rngptr, 0x100); + info->cmd_ctrl.flags = 0; + info->cmd_ctrl.max_len = 0; + + for (i = 0; i < CMD_RING_ENTRIES; i++) + writel(0, ®s->CmdRng[i]); + + writel(0, ®s->CmdPrd); + writel(0, ®s->CmdCsm); + + tmp_ptr = ap->info_dma; + tmp_ptr += (unsigned long) &(((struct ace_info *)0)->s.stats); + set_aceaddr(&info->stats2_ptr, (dma_addr_t) tmp_ptr); + + set_aceaddr(&info->rx_std_ctrl.rngptr, ap->rx_ring_base_dma); + info->rx_std_ctrl.max_len = ACE_STD_BUFSIZE; + info->rx_std_ctrl.flags = + RCB_FLG_TCP_UDP_SUM | RCB_FLG_NO_PSEUDO_HDR | RCB_FLG_VLAN_ASSIST; + + memset(ap->rx_std_ring, 0, + RX_STD_RING_ENTRIES * sizeof(struct rx_desc)); + + for (i = 0; i < RX_STD_RING_ENTRIES; i++) + ap->rx_std_ring[i].flags = BD_FLG_TCP_UDP_SUM; + + ap->rx_std_skbprd = 0; + atomic_set(&ap->cur_rx_bufs, 0); + + set_aceaddr(&info->rx_jumbo_ctrl.rngptr, + (ap->rx_ring_base_dma + + (sizeof(struct rx_desc) * RX_STD_RING_ENTRIES))); + info->rx_jumbo_ctrl.max_len = 0; + info->rx_jumbo_ctrl.flags = + RCB_FLG_TCP_UDP_SUM | RCB_FLG_NO_PSEUDO_HDR | RCB_FLG_VLAN_ASSIST; + + memset(ap->rx_jumbo_ring, 0, + RX_JUMBO_RING_ENTRIES * sizeof(struct rx_desc)); + + for (i = 0; i < RX_JUMBO_RING_ENTRIES; i++) + ap->rx_jumbo_ring[i].flags = BD_FLG_TCP_UDP_SUM | BD_FLG_JUMBO; + + ap->rx_jumbo_skbprd = 0; + atomic_set(&ap->cur_jumbo_bufs, 0); + + memset(ap->rx_mini_ring, 0, + RX_MINI_RING_ENTRIES * sizeof(struct rx_desc)); + + if (ap->version >= 2) { + set_aceaddr(&info->rx_mini_ctrl.rngptr, + (ap->rx_ring_base_dma + + (sizeof(struct rx_desc) * + (RX_STD_RING_ENTRIES + + RX_JUMBO_RING_ENTRIES)))); + info->rx_mini_ctrl.max_len = ACE_MINI_SIZE; + info->rx_mini_ctrl.flags = + RCB_FLG_TCP_UDP_SUM|RCB_FLG_NO_PSEUDO_HDR|RCB_FLG_VLAN_ASSIST; + + for (i = 0; i < RX_MINI_RING_ENTRIES; i++) + ap->rx_mini_ring[i].flags = + BD_FLG_TCP_UDP_SUM | BD_FLG_MINI; + } else { + set_aceaddr(&info->rx_mini_ctrl.rngptr, 0); + info->rx_mini_ctrl.flags = RCB_FLG_RNG_DISABLE; + info->rx_mini_ctrl.max_len = 0; + } + + ap->rx_mini_skbprd = 0; + atomic_set(&ap->cur_mini_bufs, 0); + + set_aceaddr(&info->rx_return_ctrl.rngptr, + (ap->rx_ring_base_dma + + (sizeof(struct rx_desc) * + (RX_STD_RING_ENTRIES + + RX_JUMBO_RING_ENTRIES + + RX_MINI_RING_ENTRIES)))); + info->rx_return_ctrl.flags = 0; + info->rx_return_ctrl.max_len = RX_RETURN_RING_ENTRIES; + + memset(ap->rx_return_ring, 0, + RX_RETURN_RING_ENTRIES * sizeof(struct rx_desc)); + + set_aceaddr(&info->rx_ret_prd_ptr, ap->rx_ret_prd_dma); + *(ap->rx_ret_prd) = 0; + + writel(TX_RING_BASE, ®s->WinBase); + + if (ACE_IS_TIGON_I(ap)) { + ap->tx_ring = (__force struct tx_desc *) regs->Window; + for (i = 0; i < (TIGON_I_TX_RING_ENTRIES + * sizeof(struct tx_desc)) / sizeof(u32); i++) + writel(0, (__force void __iomem *)ap->tx_ring + i * 4); + + set_aceaddr(&info->tx_ctrl.rngptr, TX_RING_BASE); + } else { + memset(ap->tx_ring, 0, + MAX_TX_RING_ENTRIES * sizeof(struct tx_desc)); + + set_aceaddr(&info->tx_ctrl.rngptr, ap->tx_ring_dma); + } + + info->tx_ctrl.max_len = ACE_TX_RING_ENTRIES(ap); + tmp = RCB_FLG_TCP_UDP_SUM | RCB_FLG_NO_PSEUDO_HDR | RCB_FLG_VLAN_ASSIST; + + /* + * The Tigon I does not like having the TX ring in host memory ;-( + */ + if (!ACE_IS_TIGON_I(ap)) + tmp |= RCB_FLG_TX_HOST_RING; +#if TX_COAL_INTS_ONLY + tmp |= RCB_FLG_COAL_INT_ONLY; +#endif + info->tx_ctrl.flags = tmp; + + set_aceaddr(&info->tx_csm_ptr, ap->tx_csm_dma); + + /* + * Potential item for tuning parameter + */ +#if 0 /* NO */ + writel(DMA_THRESH_16W, ®s->DmaReadCfg); + writel(DMA_THRESH_16W, ®s->DmaWriteCfg); +#else + writel(DMA_THRESH_8W, ®s->DmaReadCfg); + writel(DMA_THRESH_8W, ®s->DmaWriteCfg); +#endif + + writel(0, ®s->MaskInt); + writel(1, ®s->IfIdx); +#if 0 + /* + * McKinley boxes do not like us fiddling with AssistState + * this early + */ + writel(1, ®s->AssistState); +#endif + + writel(DEF_STAT, ®s->TuneStatTicks); + writel(DEF_TRACE, ®s->TuneTrace); + + ace_set_rxtx_parms(dev, 0); + + if (board_idx == BOARD_IDX_OVERFLOW) { + printk(KERN_WARNING "%s: more than %i NICs detected, " + "ignoring module parameters!\n", + ap->name, ACE_MAX_MOD_PARMS); + } else if (board_idx >= 0) { + if (tx_coal_tick[board_idx]) + writel(tx_coal_tick[board_idx], + ®s->TuneTxCoalTicks); + if (max_tx_desc[board_idx]) + writel(max_tx_desc[board_idx], ®s->TuneMaxTxDesc); + + if (rx_coal_tick[board_idx]) + writel(rx_coal_tick[board_idx], + ®s->TuneRxCoalTicks); + if (max_rx_desc[board_idx]) + writel(max_rx_desc[board_idx], ®s->TuneMaxRxDesc); + + if (trace[board_idx]) + writel(trace[board_idx], ®s->TuneTrace); + + if ((tx_ratio[board_idx] > 0) && (tx_ratio[board_idx] < 64)) + writel(tx_ratio[board_idx], ®s->TxBufRat); + } + + /* + * Default link parameters + */ + tmp = LNK_ENABLE | LNK_FULL_DUPLEX | LNK_1000MB | LNK_100MB | + LNK_10MB | LNK_RX_FLOW_CTL_Y | LNK_NEG_FCTL | LNK_NEGOTIATE; + if(ap->version >= 2) + tmp |= LNK_TX_FLOW_CTL_Y; + + /* + * Override link default parameters + */ + if ((board_idx >= 0) && link_state[board_idx]) { + int option = link_state[board_idx]; + + tmp = LNK_ENABLE; + + if (option & 0x01) { + printk(KERN_INFO "%s: Setting half duplex link\n", + ap->name); + tmp &= ~LNK_FULL_DUPLEX; + } + if (option & 0x02) + tmp &= ~LNK_NEGOTIATE; + if (option & 0x10) + tmp |= LNK_10MB; + if (option & 0x20) + tmp |= LNK_100MB; + if (option & 0x40) + tmp |= LNK_1000MB; + if ((option & 0x70) == 0) { + printk(KERN_WARNING "%s: No media speed specified, " + "forcing auto negotiation\n", ap->name); + tmp |= LNK_NEGOTIATE | LNK_1000MB | + LNK_100MB | LNK_10MB; + } + if ((option & 0x100) == 0) + tmp |= LNK_NEG_FCTL; + else + printk(KERN_INFO "%s: Disabling flow control " + "negotiation\n", ap->name); + if (option & 0x200) + tmp |= LNK_RX_FLOW_CTL_Y; + if ((option & 0x400) && (ap->version >= 2)) { + printk(KERN_INFO "%s: Enabling TX flow control\n", + ap->name); + tmp |= LNK_TX_FLOW_CTL_Y; + } + } + + ap->link = tmp; + writel(tmp, ®s->TuneLink); + if (ap->version >= 2) + writel(tmp, ®s->TuneFastLink); + + writel(ap->firmware_start, ®s->Pc); + + writel(0, ®s->Mb0Lo); + + /* + * Set tx_csm before we start receiving interrupts, otherwise + * the interrupt handler might think it is supposed to process + * tx ints before we are up and running, which may cause a null + * pointer access in the int handler. + */ + ap->cur_rx = 0; + ap->tx_prd = *(ap->tx_csm) = ap->tx_ret_csm = 0; + + wmb(); + ace_set_txprd(regs, ap, 0); + writel(0, ®s->RxRetCsm); + + /* + * Enable DMA engine now. + * If we do this sooner, Mckinley box pukes. + * I assume it's because Tigon II DMA engine wants to check + * *something* even before the CPU is started. + */ + writel(1, ®s->AssistState); /* enable DMA */ + + /* + * Start the NIC CPU + */ + writel(readl(®s->CpuCtrl) & ~(CPU_HALT|CPU_TRACE), ®s->CpuCtrl); + readl(®s->CpuCtrl); + + /* + * Wait for the firmware to spin up - max 3 seconds. + */ + myjif = jiffies + 3 * HZ; + while (time_before(jiffies, myjif) && !ap->fw_running) + cpu_relax(); + + if (!ap->fw_running) { + printk(KERN_ERR "%s: Firmware NOT running!\n", ap->name); + + ace_dump_trace(ap); + writel(readl(®s->CpuCtrl) | CPU_HALT, ®s->CpuCtrl); + readl(®s->CpuCtrl); + + /* aman@sgi.com - account for badly behaving firmware/NIC: + * - have observed that the NIC may continue to generate + * interrupts for some reason; attempt to stop it - halt + * second CPU for Tigon II cards, and also clear Mb0 + * - if we're a module, we'll fail to load if this was + * the only GbE card in the system => if the kernel does + * see an interrupt from the NIC, code to handle it is + * gone and OOps! - so free_irq also + */ + if (ap->version >= 2) + writel(readl(®s->CpuBCtrl) | CPU_HALT, + ®s->CpuBCtrl); + writel(0, ®s->Mb0Lo); + readl(®s->Mb0Lo); + + ecode = -EBUSY; + goto init_error; + } + + /* + * We load the ring here as there seem to be no way to tell the + * firmware to wipe the ring without re-initializing it. + */ + if (!test_and_set_bit(0, &ap->std_refill_busy)) + ace_load_std_rx_ring(dev, RX_RING_SIZE); + else + printk(KERN_ERR "%s: Someone is busy refilling the RX ring\n", + ap->name); + if (ap->version >= 2) { + if (!test_and_set_bit(0, &ap->mini_refill_busy)) + ace_load_mini_rx_ring(dev, RX_MINI_SIZE); + else + printk(KERN_ERR "%s: Someone is busy refilling " + "the RX mini ring\n", ap->name); + } + return 0; + + init_error: + ace_init_cleanup(dev); + return ecode; +} + + +static void ace_set_rxtx_parms(struct net_device *dev, int jumbo) +{ + struct ace_private *ap = netdev_priv(dev); + struct ace_regs __iomem *regs = ap->regs; + int board_idx = ap->board_idx; + + if (board_idx >= 0) { + if (!jumbo) { + if (!tx_coal_tick[board_idx]) + writel(DEF_TX_COAL, ®s->TuneTxCoalTicks); + if (!max_tx_desc[board_idx]) + writel(DEF_TX_MAX_DESC, ®s->TuneMaxTxDesc); + if (!rx_coal_tick[board_idx]) + writel(DEF_RX_COAL, ®s->TuneRxCoalTicks); + if (!max_rx_desc[board_idx]) + writel(DEF_RX_MAX_DESC, ®s->TuneMaxRxDesc); + if (!tx_ratio[board_idx]) + writel(DEF_TX_RATIO, ®s->TxBufRat); + } else { + if (!tx_coal_tick[board_idx]) + writel(DEF_JUMBO_TX_COAL, + ®s->TuneTxCoalTicks); + if (!max_tx_desc[board_idx]) + writel(DEF_JUMBO_TX_MAX_DESC, + ®s->TuneMaxTxDesc); + if (!rx_coal_tick[board_idx]) + writel(DEF_JUMBO_RX_COAL, + ®s->TuneRxCoalTicks); + if (!max_rx_desc[board_idx]) + writel(DEF_JUMBO_RX_MAX_DESC, + ®s->TuneMaxRxDesc); + if (!tx_ratio[board_idx]) + writel(DEF_JUMBO_TX_RATIO, ®s->TxBufRat); + } + } +} + + +static void ace_watchdog(struct net_device *data) +{ + struct net_device *dev = data; + struct ace_private *ap = netdev_priv(dev); + struct ace_regs __iomem *regs = ap->regs; + + /* + * We haven't received a stats update event for more than 2.5 + * seconds and there is data in the transmit queue, thus we + * assume the card is stuck. + */ + if (*ap->tx_csm != ap->tx_ret_csm) { + printk(KERN_WARNING "%s: Transmitter is stuck, %08x\n", + dev->name, (unsigned int)readl(®s->HostCtrl)); + /* This can happen due to ieee flow control. */ + } else { + printk(KERN_DEBUG "%s: BUG... transmitter died. Kicking it.\n", + dev->name); +#if 0 + netif_wake_queue(dev); +#endif + } +} + + +static void ace_tasklet(unsigned long arg) +{ + struct net_device *dev = (struct net_device *) arg; + struct ace_private *ap = netdev_priv(dev); + int cur_size; + + cur_size = atomic_read(&ap->cur_rx_bufs); + if ((cur_size < RX_LOW_STD_THRES) && + !test_and_set_bit(0, &ap->std_refill_busy)) { +#ifdef DEBUG + printk("refilling buffers (current %i)\n", cur_size); +#endif + ace_load_std_rx_ring(dev, RX_RING_SIZE - cur_size); + } + + if (ap->version >= 2) { + cur_size = atomic_read(&ap->cur_mini_bufs); + if ((cur_size < RX_LOW_MINI_THRES) && + !test_and_set_bit(0, &ap->mini_refill_busy)) { +#ifdef DEBUG + printk("refilling mini buffers (current %i)\n", + cur_size); +#endif + ace_load_mini_rx_ring(dev, RX_MINI_SIZE - cur_size); + } + } + + cur_size = atomic_read(&ap->cur_jumbo_bufs); + if (ap->jumbo && (cur_size < RX_LOW_JUMBO_THRES) && + !test_and_set_bit(0, &ap->jumbo_refill_busy)) { +#ifdef DEBUG + printk("refilling jumbo buffers (current %i)\n", cur_size); +#endif + ace_load_jumbo_rx_ring(dev, RX_JUMBO_SIZE - cur_size); + } + ap->tasklet_pending = 0; +} + + +/* + * Copy the contents of the NIC's trace buffer to kernel memory. + */ +static void ace_dump_trace(struct ace_private *ap) +{ +#if 0 + if (!ap->trace_buf) + if (!(ap->trace_buf = kmalloc(ACE_TRACE_SIZE, GFP_KERNEL))) + return; +#endif +} + + +/* + * Load the standard rx ring. + * + * Loading rings is safe without holding the spin lock since this is + * done only before the device is enabled, thus no interrupts are + * generated and by the interrupt handler/tasklet handler. + */ +static void ace_load_std_rx_ring(struct net_device *dev, int nr_bufs) +{ + struct ace_private *ap = netdev_priv(dev); + struct ace_regs __iomem *regs = ap->regs; + short i, idx; + + + prefetchw(&ap->cur_rx_bufs); + + idx = ap->rx_std_skbprd; + + for (i = 0; i < nr_bufs; i++) { + struct sk_buff *skb; + struct rx_desc *rd; + dma_addr_t mapping; + + skb = netdev_alloc_skb_ip_align(dev, ACE_STD_BUFSIZE); + if (!skb) + break; + + mapping = pci_map_page(ap->pdev, virt_to_page(skb->data), + offset_in_page(skb->data), + ACE_STD_BUFSIZE, + PCI_DMA_FROMDEVICE); + ap->skb->rx_std_skbuff[idx].skb = skb; + dma_unmap_addr_set(&ap->skb->rx_std_skbuff[idx], + mapping, mapping); + + rd = &ap->rx_std_ring[idx]; + set_aceaddr(&rd->addr, mapping); + rd->size = ACE_STD_BUFSIZE; + rd->idx = idx; + idx = (idx + 1) % RX_STD_RING_ENTRIES; + } + + if (!i) + goto error_out; + + atomic_add(i, &ap->cur_rx_bufs); + ap->rx_std_skbprd = idx; + + if (ACE_IS_TIGON_I(ap)) { + struct cmd cmd; + cmd.evt = C_SET_RX_PRD_IDX; + cmd.code = 0; + cmd.idx = ap->rx_std_skbprd; + ace_issue_cmd(regs, &cmd); + } else { + writel(idx, ®s->RxStdPrd); + wmb(); + } + + out: + clear_bit(0, &ap->std_refill_busy); + return; + + error_out: + printk(KERN_INFO "Out of memory when allocating " + "standard receive buffers\n"); + goto out; +} + + +static void ace_load_mini_rx_ring(struct net_device *dev, int nr_bufs) +{ + struct ace_private *ap = netdev_priv(dev); + struct ace_regs __iomem *regs = ap->regs; + short i, idx; + + prefetchw(&ap->cur_mini_bufs); + + idx = ap->rx_mini_skbprd; + for (i = 0; i < nr_bufs; i++) { + struct sk_buff *skb; + struct rx_desc *rd; + dma_addr_t mapping; + + skb = netdev_alloc_skb_ip_align(dev, ACE_MINI_BUFSIZE); + if (!skb) + break; + + mapping = pci_map_page(ap->pdev, virt_to_page(skb->data), + offset_in_page(skb->data), + ACE_MINI_BUFSIZE, + PCI_DMA_FROMDEVICE); + ap->skb->rx_mini_skbuff[idx].skb = skb; + dma_unmap_addr_set(&ap->skb->rx_mini_skbuff[idx], + mapping, mapping); + + rd = &ap->rx_mini_ring[idx]; + set_aceaddr(&rd->addr, mapping); + rd->size = ACE_MINI_BUFSIZE; + rd->idx = idx; + idx = (idx + 1) % RX_MINI_RING_ENTRIES; + } + + if (!i) + goto error_out; + + atomic_add(i, &ap->cur_mini_bufs); + + ap->rx_mini_skbprd = idx; + + writel(idx, ®s->RxMiniPrd); + wmb(); + + out: + clear_bit(0, &ap->mini_refill_busy); + return; + error_out: + printk(KERN_INFO "Out of memory when allocating " + "mini receive buffers\n"); + goto out; +} + + +/* + * Load the jumbo rx ring, this may happen at any time if the MTU + * is changed to a value > 1500. + */ +static void ace_load_jumbo_rx_ring(struct net_device *dev, int nr_bufs) +{ + struct ace_private *ap = netdev_priv(dev); + struct ace_regs __iomem *regs = ap->regs; + short i, idx; + + idx = ap->rx_jumbo_skbprd; + + for (i = 0; i < nr_bufs; i++) { + struct sk_buff *skb; + struct rx_desc *rd; + dma_addr_t mapping; + + skb = netdev_alloc_skb_ip_align(dev, ACE_JUMBO_BUFSIZE); + if (!skb) + break; + + mapping = pci_map_page(ap->pdev, virt_to_page(skb->data), + offset_in_page(skb->data), + ACE_JUMBO_BUFSIZE, + PCI_DMA_FROMDEVICE); + ap->skb->rx_jumbo_skbuff[idx].skb = skb; + dma_unmap_addr_set(&ap->skb->rx_jumbo_skbuff[idx], + mapping, mapping); + + rd = &ap->rx_jumbo_ring[idx]; + set_aceaddr(&rd->addr, mapping); + rd->size = ACE_JUMBO_BUFSIZE; + rd->idx = idx; + idx = (idx + 1) % RX_JUMBO_RING_ENTRIES; + } + + if (!i) + goto error_out; + + atomic_add(i, &ap->cur_jumbo_bufs); + ap->rx_jumbo_skbprd = idx; + + if (ACE_IS_TIGON_I(ap)) { + struct cmd cmd; + cmd.evt = C_SET_RX_JUMBO_PRD_IDX; + cmd.code = 0; + cmd.idx = ap->rx_jumbo_skbprd; + ace_issue_cmd(regs, &cmd); + } else { + writel(idx, ®s->RxJumboPrd); + wmb(); + } + + out: + clear_bit(0, &ap->jumbo_refill_busy); + return; + error_out: + if (net_ratelimit()) + printk(KERN_INFO "Out of memory when allocating " + "jumbo receive buffers\n"); + goto out; +} + + +/* + * All events are considered to be slow (RX/TX ints do not generate + * events) and are handled here, outside the main interrupt handler, + * to reduce the size of the handler. + */ +static u32 ace_handle_event(struct net_device *dev, u32 evtcsm, u32 evtprd) +{ + struct ace_private *ap; + + ap = netdev_priv(dev); + + while (evtcsm != evtprd) { + switch (ap->evt_ring[evtcsm].evt) { + case E_FW_RUNNING: + printk(KERN_INFO "%s: Firmware up and running\n", + ap->name); + ap->fw_running = 1; + wmb(); + break; + case E_STATS_UPDATED: + break; + case E_LNK_STATE: + { + u16 code = ap->evt_ring[evtcsm].code; + switch (code) { + case E_C_LINK_UP: + { + u32 state = readl(&ap->regs->GigLnkState); + printk(KERN_WARNING "%s: Optical link UP " + "(%s Duplex, Flow Control: %s%s)\n", + ap->name, + state & LNK_FULL_DUPLEX ? "Full":"Half", + state & LNK_TX_FLOW_CTL_Y ? "TX " : "", + state & LNK_RX_FLOW_CTL_Y ? "RX" : ""); + break; + } + case E_C_LINK_DOWN: + printk(KERN_WARNING "%s: Optical link DOWN\n", + ap->name); + break; + case E_C_LINK_10_100: + printk(KERN_WARNING "%s: 10/100BaseT link " + "UP\n", ap->name); + break; + default: + printk(KERN_ERR "%s: Unknown optical link " + "state %02x\n", ap->name, code); + } + break; + } + case E_ERROR: + switch(ap->evt_ring[evtcsm].code) { + case E_C_ERR_INVAL_CMD: + printk(KERN_ERR "%s: invalid command error\n", + ap->name); + break; + case E_C_ERR_UNIMP_CMD: + printk(KERN_ERR "%s: unimplemented command " + "error\n", ap->name); + break; + case E_C_ERR_BAD_CFG: + printk(KERN_ERR "%s: bad config error\n", + ap->name); + break; + default: + printk(KERN_ERR "%s: unknown error %02x\n", + ap->name, ap->evt_ring[evtcsm].code); + } + break; + case E_RESET_JUMBO_RNG: + { + int i; + for (i = 0; i < RX_JUMBO_RING_ENTRIES; i++) { + if (ap->skb->rx_jumbo_skbuff[i].skb) { + ap->rx_jumbo_ring[i].size = 0; + set_aceaddr(&ap->rx_jumbo_ring[i].addr, 0); + dev_kfree_skb(ap->skb->rx_jumbo_skbuff[i].skb); + ap->skb->rx_jumbo_skbuff[i].skb = NULL; + } + } + + if (ACE_IS_TIGON_I(ap)) { + struct cmd cmd; + cmd.evt = C_SET_RX_JUMBO_PRD_IDX; + cmd.code = 0; + cmd.idx = 0; + ace_issue_cmd(ap->regs, &cmd); + } else { + writel(0, &((ap->regs)->RxJumboPrd)); + wmb(); + } + + ap->jumbo = 0; + ap->rx_jumbo_skbprd = 0; + printk(KERN_INFO "%s: Jumbo ring flushed\n", + ap->name); + clear_bit(0, &ap->jumbo_refill_busy); + break; + } + default: + printk(KERN_ERR "%s: Unhandled event 0x%02x\n", + ap->name, ap->evt_ring[evtcsm].evt); + } + evtcsm = (evtcsm + 1) % EVT_RING_ENTRIES; + } + + return evtcsm; +} + + +static void ace_rx_int(struct net_device *dev, u32 rxretprd, u32 rxretcsm) +{ + struct ace_private *ap = netdev_priv(dev); + u32 idx; + int mini_count = 0, std_count = 0; + + idx = rxretcsm; + + prefetchw(&ap->cur_rx_bufs); + prefetchw(&ap->cur_mini_bufs); + + while (idx != rxretprd) { + struct ring_info *rip; + struct sk_buff *skb; + struct rx_desc *rxdesc, *retdesc; + u32 skbidx; + int bd_flags, desc_type, mapsize; + u16 csum; + + + /* make sure the rx descriptor isn't read before rxretprd */ + if (idx == rxretcsm) + rmb(); + + retdesc = &ap->rx_return_ring[idx]; + skbidx = retdesc->idx; + bd_flags = retdesc->flags; + desc_type = bd_flags & (BD_FLG_JUMBO | BD_FLG_MINI); + + switch(desc_type) { + /* + * Normal frames do not have any flags set + * + * Mini and normal frames arrive frequently, + * so use a local counter to avoid doing + * atomic operations for each packet arriving. + */ + case 0: + rip = &ap->skb->rx_std_skbuff[skbidx]; + mapsize = ACE_STD_BUFSIZE; + rxdesc = &ap->rx_std_ring[skbidx]; + std_count++; + break; + case BD_FLG_JUMBO: + rip = &ap->skb->rx_jumbo_skbuff[skbidx]; + mapsize = ACE_JUMBO_BUFSIZE; + rxdesc = &ap->rx_jumbo_ring[skbidx]; + atomic_dec(&ap->cur_jumbo_bufs); + break; + case BD_FLG_MINI: + rip = &ap->skb->rx_mini_skbuff[skbidx]; + mapsize = ACE_MINI_BUFSIZE; + rxdesc = &ap->rx_mini_ring[skbidx]; + mini_count++; + break; + default: + printk(KERN_INFO "%s: unknown frame type (0x%02x) " + "returned by NIC\n", dev->name, + retdesc->flags); + goto error; + } + + skb = rip->skb; + rip->skb = NULL; + pci_unmap_page(ap->pdev, + dma_unmap_addr(rip, mapping), + mapsize, + PCI_DMA_FROMDEVICE); + skb_put(skb, retdesc->size); + + /* + * Fly baby, fly! + */ + csum = retdesc->tcp_udp_csum; + + skb->protocol = eth_type_trans(skb, dev); + + /* + * Instead of forcing the poor tigon mips cpu to calculate + * pseudo hdr checksum, we do this ourselves. + */ + if (bd_flags & BD_FLG_TCP_UDP_SUM) { + skb->csum = htons(csum); + skb->ip_summed = CHECKSUM_COMPLETE; + } else { + skb_checksum_none_assert(skb); + } + + /* send it up */ + if ((bd_flags & BD_FLG_VLAN_TAG)) + __vlan_hwaccel_put_tag(skb, retdesc->vlan); + netif_rx(skb); + + dev->stats.rx_packets++; + dev->stats.rx_bytes += retdesc->size; + + idx = (idx + 1) % RX_RETURN_RING_ENTRIES; + } + + atomic_sub(std_count, &ap->cur_rx_bufs); + if (!ACE_IS_TIGON_I(ap)) + atomic_sub(mini_count, &ap->cur_mini_bufs); + + out: + /* + * According to the documentation RxRetCsm is obsolete with + * the 12.3.x Firmware - my Tigon I NICs seem to disagree! + */ + if (ACE_IS_TIGON_I(ap)) { + writel(idx, &ap->regs->RxRetCsm); + } + ap->cur_rx = idx; + + return; + error: + idx = rxretprd; + goto out; +} + + +static inline void ace_tx_int(struct net_device *dev, + u32 txcsm, u32 idx) +{ + struct ace_private *ap = netdev_priv(dev); + + do { + struct sk_buff *skb; + struct tx_ring_info *info; + + info = ap->skb->tx_skbuff + idx; + skb = info->skb; + + if (dma_unmap_len(info, maplen)) { + pci_unmap_page(ap->pdev, dma_unmap_addr(info, mapping), + dma_unmap_len(info, maplen), + PCI_DMA_TODEVICE); + dma_unmap_len_set(info, maplen, 0); + } + + if (skb) { + dev->stats.tx_packets++; + dev->stats.tx_bytes += skb->len; + dev_kfree_skb_irq(skb); + info->skb = NULL; + } + + idx = (idx + 1) % ACE_TX_RING_ENTRIES(ap); + } while (idx != txcsm); + + if (netif_queue_stopped(dev)) + netif_wake_queue(dev); + + wmb(); + ap->tx_ret_csm = txcsm; + + /* So... tx_ret_csm is advanced _after_ check for device wakeup. + * + * We could try to make it before. In this case we would get + * the following race condition: hard_start_xmit on other cpu + * enters after we advanced tx_ret_csm and fills space, + * which we have just freed, so that we make illegal device wakeup. + * There is no good way to workaround this (at entry + * to ace_start_xmit detects this condition and prevents + * ring corruption, but it is not a good workaround.) + * + * When tx_ret_csm is advanced after, we wake up device _only_ + * if we really have some space in ring (though the core doing + * hard_start_xmit can see full ring for some period and has to + * synchronize.) Superb. + * BUT! We get another subtle race condition. hard_start_xmit + * may think that ring is full between wakeup and advancing + * tx_ret_csm and will stop device instantly! It is not so bad. + * We are guaranteed that there is something in ring, so that + * the next irq will resume transmission. To speedup this we could + * mark descriptor, which closes ring with BD_FLG_COAL_NOW + * (see ace_start_xmit). + * + * Well, this dilemma exists in all lock-free devices. + * We, following scheme used in drivers by Donald Becker, + * select the least dangerous. + * --ANK + */ +} + + +static irqreturn_t ace_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = (struct net_device *)dev_id; + struct ace_private *ap = netdev_priv(dev); + struct ace_regs __iomem *regs = ap->regs; + u32 idx; + u32 txcsm, rxretcsm, rxretprd; + u32 evtcsm, evtprd; + + /* + * In case of PCI shared interrupts or spurious interrupts, + * we want to make sure it is actually our interrupt before + * spending any time in here. + */ + if (!(readl(®s->HostCtrl) & IN_INT)) + return IRQ_NONE; + + /* + * ACK intr now. Otherwise we will lose updates to rx_ret_prd, + * which happened _after_ rxretprd = *ap->rx_ret_prd; but before + * writel(0, ®s->Mb0Lo). + * + * "IRQ avoidance" recommended in docs applies to IRQs served + * threads and it is wrong even for that case. + */ + writel(0, ®s->Mb0Lo); + readl(®s->Mb0Lo); + + /* + * There is no conflict between transmit handling in + * start_xmit and receive processing, thus there is no reason + * to take a spin lock for RX handling. Wait until we start + * working on the other stuff - hey we don't need a spin lock + * anymore. + */ + rxretprd = *ap->rx_ret_prd; + rxretcsm = ap->cur_rx; + + if (rxretprd != rxretcsm) + ace_rx_int(dev, rxretprd, rxretcsm); + + txcsm = *ap->tx_csm; + idx = ap->tx_ret_csm; + + if (txcsm != idx) { + /* + * If each skb takes only one descriptor this check degenerates + * to identity, because new space has just been opened. + * But if skbs are fragmented we must check that this index + * update releases enough of space, otherwise we just + * wait for device to make more work. + */ + if (!tx_ring_full(ap, txcsm, ap->tx_prd)) + ace_tx_int(dev, txcsm, idx); + } + + evtcsm = readl(®s->EvtCsm); + evtprd = *ap->evt_prd; + + if (evtcsm != evtprd) { + evtcsm = ace_handle_event(dev, evtcsm, evtprd); + writel(evtcsm, ®s->EvtCsm); + } + + /* + * This has to go last in the interrupt handler and run with + * the spin lock released ... what lock? + */ + if (netif_running(dev)) { + int cur_size; + int run_tasklet = 0; + + cur_size = atomic_read(&ap->cur_rx_bufs); + if (cur_size < RX_LOW_STD_THRES) { + if ((cur_size < RX_PANIC_STD_THRES) && + !test_and_set_bit(0, &ap->std_refill_busy)) { +#ifdef DEBUG + printk("low on std buffers %i\n", cur_size); +#endif + ace_load_std_rx_ring(dev, + RX_RING_SIZE - cur_size); + } else + run_tasklet = 1; + } + + if (!ACE_IS_TIGON_I(ap)) { + cur_size = atomic_read(&ap->cur_mini_bufs); + if (cur_size < RX_LOW_MINI_THRES) { + if ((cur_size < RX_PANIC_MINI_THRES) && + !test_and_set_bit(0, + &ap->mini_refill_busy)) { +#ifdef DEBUG + printk("low on mini buffers %i\n", + cur_size); +#endif + ace_load_mini_rx_ring(dev, + RX_MINI_SIZE - cur_size); + } else + run_tasklet = 1; + } + } + + if (ap->jumbo) { + cur_size = atomic_read(&ap->cur_jumbo_bufs); + if (cur_size < RX_LOW_JUMBO_THRES) { + if ((cur_size < RX_PANIC_JUMBO_THRES) && + !test_and_set_bit(0, + &ap->jumbo_refill_busy)){ +#ifdef DEBUG + printk("low on jumbo buffers %i\n", + cur_size); +#endif + ace_load_jumbo_rx_ring(dev, + RX_JUMBO_SIZE - cur_size); + } else + run_tasklet = 1; + } + } + if (run_tasklet && !ap->tasklet_pending) { + ap->tasklet_pending = 1; + tasklet_schedule(&ap->ace_tasklet); + } + } + + return IRQ_HANDLED; +} + +static int ace_open(struct net_device *dev) +{ + struct ace_private *ap = netdev_priv(dev); + struct ace_regs __iomem *regs = ap->regs; + struct cmd cmd; + + if (!(ap->fw_running)) { + printk(KERN_WARNING "%s: Firmware not running!\n", dev->name); + return -EBUSY; + } + + writel(dev->mtu + ETH_HLEN + 4, ®s->IfMtu); + + cmd.evt = C_CLEAR_STATS; + cmd.code = 0; + cmd.idx = 0; + ace_issue_cmd(regs, &cmd); + + cmd.evt = C_HOST_STATE; + cmd.code = C_C_STACK_UP; + cmd.idx = 0; + ace_issue_cmd(regs, &cmd); + + if (ap->jumbo && + !test_and_set_bit(0, &ap->jumbo_refill_busy)) + ace_load_jumbo_rx_ring(dev, RX_JUMBO_SIZE); + + if (dev->flags & IFF_PROMISC) { + cmd.evt = C_SET_PROMISC_MODE; + cmd.code = C_C_PROMISC_ENABLE; + cmd.idx = 0; + ace_issue_cmd(regs, &cmd); + + ap->promisc = 1; + }else + ap->promisc = 0; + ap->mcast_all = 0; + +#if 0 + cmd.evt = C_LNK_NEGOTIATION; + cmd.code = 0; + cmd.idx = 0; + ace_issue_cmd(regs, &cmd); +#endif + + netif_start_queue(dev); + + /* + * Setup the bottom half rx ring refill handler + */ + tasklet_init(&ap->ace_tasklet, ace_tasklet, (unsigned long)dev); + return 0; +} + + +static int ace_close(struct net_device *dev) +{ + struct ace_private *ap = netdev_priv(dev); + struct ace_regs __iomem *regs = ap->regs; + struct cmd cmd; + unsigned long flags; + short i; + + /* + * Without (or before) releasing irq and stopping hardware, this + * is an absolute non-sense, by the way. It will be reset instantly + * by the first irq. + */ + netif_stop_queue(dev); + + + if (ap->promisc) { + cmd.evt = C_SET_PROMISC_MODE; + cmd.code = C_C_PROMISC_DISABLE; + cmd.idx = 0; + ace_issue_cmd(regs, &cmd); + ap->promisc = 0; + } + + cmd.evt = C_HOST_STATE; + cmd.code = C_C_STACK_DOWN; + cmd.idx = 0; + ace_issue_cmd(regs, &cmd); + + tasklet_kill(&ap->ace_tasklet); + + /* + * Make sure one CPU is not processing packets while + * buffers are being released by another. + */ + + local_irq_save(flags); + ace_mask_irq(dev); + + for (i = 0; i < ACE_TX_RING_ENTRIES(ap); i++) { + struct sk_buff *skb; + struct tx_ring_info *info; + + info = ap->skb->tx_skbuff + i; + skb = info->skb; + + if (dma_unmap_len(info, maplen)) { + if (ACE_IS_TIGON_I(ap)) { + /* NB: TIGON_1 is special, tx_ring is in io space */ + struct tx_desc __iomem *tx; + tx = (__force struct tx_desc __iomem *) &ap->tx_ring[i]; + writel(0, &tx->addr.addrhi); + writel(0, &tx->addr.addrlo); + writel(0, &tx->flagsize); + } else + memset(ap->tx_ring + i, 0, + sizeof(struct tx_desc)); + pci_unmap_page(ap->pdev, dma_unmap_addr(info, mapping), + dma_unmap_len(info, maplen), + PCI_DMA_TODEVICE); + dma_unmap_len_set(info, maplen, 0); + } + if (skb) { + dev_kfree_skb(skb); + info->skb = NULL; + } + } + + if (ap->jumbo) { + cmd.evt = C_RESET_JUMBO_RNG; + cmd.code = 0; + cmd.idx = 0; + ace_issue_cmd(regs, &cmd); + } + + ace_unmask_irq(dev); + local_irq_restore(flags); + + return 0; +} + + +static inline dma_addr_t +ace_map_tx_skb(struct ace_private *ap, struct sk_buff *skb, + struct sk_buff *tail, u32 idx) +{ + dma_addr_t mapping; + struct tx_ring_info *info; + + mapping = pci_map_page(ap->pdev, virt_to_page(skb->data), + offset_in_page(skb->data), + skb->len, PCI_DMA_TODEVICE); + + info = ap->skb->tx_skbuff + idx; + info->skb = tail; + dma_unmap_addr_set(info, mapping, mapping); + dma_unmap_len_set(info, maplen, skb->len); + return mapping; +} + + +static inline void +ace_load_tx_bd(struct ace_private *ap, struct tx_desc *desc, u64 addr, + u32 flagsize, u32 vlan_tag) +{ +#if !USE_TX_COAL_NOW + flagsize &= ~BD_FLG_COAL_NOW; +#endif + + if (ACE_IS_TIGON_I(ap)) { + struct tx_desc __iomem *io = (__force struct tx_desc __iomem *) desc; + writel(addr >> 32, &io->addr.addrhi); + writel(addr & 0xffffffff, &io->addr.addrlo); + writel(flagsize, &io->flagsize); + writel(vlan_tag, &io->vlanres); + } else { + desc->addr.addrhi = addr >> 32; + desc->addr.addrlo = addr; + desc->flagsize = flagsize; + desc->vlanres = vlan_tag; + } +} + + +static netdev_tx_t ace_start_xmit(struct sk_buff *skb, + struct net_device *dev) +{ + struct ace_private *ap = netdev_priv(dev); + struct ace_regs __iomem *regs = ap->regs; + struct tx_desc *desc; + u32 idx, flagsize; + unsigned long maxjiff = jiffies + 3*HZ; + +restart: + idx = ap->tx_prd; + + if (tx_ring_full(ap, ap->tx_ret_csm, idx)) + goto overflow; + + if (!skb_shinfo(skb)->nr_frags) { + dma_addr_t mapping; + u32 vlan_tag = 0; + + mapping = ace_map_tx_skb(ap, skb, skb, idx); + flagsize = (skb->len << 16) | (BD_FLG_END); + if (skb->ip_summed == CHECKSUM_PARTIAL) + flagsize |= BD_FLG_TCP_UDP_SUM; + if (vlan_tx_tag_present(skb)) { + flagsize |= BD_FLG_VLAN_TAG; + vlan_tag = vlan_tx_tag_get(skb); + } + desc = ap->tx_ring + idx; + idx = (idx + 1) % ACE_TX_RING_ENTRIES(ap); + + /* Look at ace_tx_int for explanations. */ + if (tx_ring_full(ap, ap->tx_ret_csm, idx)) + flagsize |= BD_FLG_COAL_NOW; + + ace_load_tx_bd(ap, desc, mapping, flagsize, vlan_tag); + } else { + dma_addr_t mapping; + u32 vlan_tag = 0; + int i, len = 0; + + mapping = ace_map_tx_skb(ap, skb, NULL, idx); + flagsize = (skb_headlen(skb) << 16); + if (skb->ip_summed == CHECKSUM_PARTIAL) + flagsize |= BD_FLG_TCP_UDP_SUM; + if (vlan_tx_tag_present(skb)) { + flagsize |= BD_FLG_VLAN_TAG; + vlan_tag = vlan_tx_tag_get(skb); + } + + ace_load_tx_bd(ap, ap->tx_ring + idx, mapping, flagsize, vlan_tag); + + idx = (idx + 1) % ACE_TX_RING_ENTRIES(ap); + + for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { + skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; + struct tx_ring_info *info; + + len += frag->size; + info = ap->skb->tx_skbuff + idx; + desc = ap->tx_ring + idx; + + mapping = pci_map_page(ap->pdev, frag->page, + frag->page_offset, frag->size, + PCI_DMA_TODEVICE); + + flagsize = (frag->size << 16); + if (skb->ip_summed == CHECKSUM_PARTIAL) + flagsize |= BD_FLG_TCP_UDP_SUM; + idx = (idx + 1) % ACE_TX_RING_ENTRIES(ap); + + if (i == skb_shinfo(skb)->nr_frags - 1) { + flagsize |= BD_FLG_END; + if (tx_ring_full(ap, ap->tx_ret_csm, idx)) + flagsize |= BD_FLG_COAL_NOW; + + /* + * Only the last fragment frees + * the skb! + */ + info->skb = skb; + } else { + info->skb = NULL; + } + dma_unmap_addr_set(info, mapping, mapping); + dma_unmap_len_set(info, maplen, frag->size); + ace_load_tx_bd(ap, desc, mapping, flagsize, vlan_tag); + } + } + + wmb(); + ap->tx_prd = idx; + ace_set_txprd(regs, ap, idx); + + if (flagsize & BD_FLG_COAL_NOW) { + netif_stop_queue(dev); + + /* + * A TX-descriptor producer (an IRQ) might have gotten + * between, making the ring free again. Since xmit is + * serialized, this is the only situation we have to + * re-test. + */ + if (!tx_ring_full(ap, ap->tx_ret_csm, idx)) + netif_wake_queue(dev); + } + + return NETDEV_TX_OK; + +overflow: + /* + * This race condition is unavoidable with lock-free drivers. + * We wake up the queue _before_ tx_prd is advanced, so that we can + * enter hard_start_xmit too early, while tx ring still looks closed. + * This happens ~1-4 times per 100000 packets, so that we can allow + * to loop syncing to other CPU. Probably, we need an additional + * wmb() in ace_tx_intr as well. + * + * Note that this race is relieved by reserving one more entry + * in tx ring than it is necessary (see original non-SG driver). + * However, with SG we need to reserve 2*MAX_SKB_FRAGS+1, which + * is already overkill. + * + * Alternative is to return with 1 not throttling queue. In this + * case loop becomes longer, no more useful effects. + */ + if (time_before(jiffies, maxjiff)) { + barrier(); + cpu_relax(); + goto restart; + } + + /* The ring is stuck full. */ + printk(KERN_WARNING "%s: Transmit ring stuck full\n", dev->name); + return NETDEV_TX_BUSY; +} + + +static int ace_change_mtu(struct net_device *dev, int new_mtu) +{ + struct ace_private *ap = netdev_priv(dev); + struct ace_regs __iomem *regs = ap->regs; + + if (new_mtu > ACE_JUMBO_MTU) + return -EINVAL; + + writel(new_mtu + ETH_HLEN + 4, ®s->IfMtu); + dev->mtu = new_mtu; + + if (new_mtu > ACE_STD_MTU) { + if (!(ap->jumbo)) { + printk(KERN_INFO "%s: Enabling Jumbo frame " + "support\n", dev->name); + ap->jumbo = 1; + if (!test_and_set_bit(0, &ap->jumbo_refill_busy)) + ace_load_jumbo_rx_ring(dev, RX_JUMBO_SIZE); + ace_set_rxtx_parms(dev, 1); + } + } else { + while (test_and_set_bit(0, &ap->jumbo_refill_busy)); + ace_sync_irq(dev->irq); + ace_set_rxtx_parms(dev, 0); + if (ap->jumbo) { + struct cmd cmd; + + cmd.evt = C_RESET_JUMBO_RNG; + cmd.code = 0; + cmd.idx = 0; + ace_issue_cmd(regs, &cmd); + } + } + + return 0; +} + +static int ace_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd) +{ + struct ace_private *ap = netdev_priv(dev); + struct ace_regs __iomem *regs = ap->regs; + u32 link; + + memset(ecmd, 0, sizeof(struct ethtool_cmd)); + ecmd->supported = + (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | + SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | + SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full | + SUPPORTED_Autoneg | SUPPORTED_FIBRE); + + ecmd->port = PORT_FIBRE; + ecmd->transceiver = XCVR_INTERNAL; + + link = readl(®s->GigLnkState); + if (link & LNK_1000MB) + ethtool_cmd_speed_set(ecmd, SPEED_1000); + else { + link = readl(®s->FastLnkState); + if (link & LNK_100MB) + ethtool_cmd_speed_set(ecmd, SPEED_100); + else if (link & LNK_10MB) + ethtool_cmd_speed_set(ecmd, SPEED_10); + else + ethtool_cmd_speed_set(ecmd, 0); + } + if (link & LNK_FULL_DUPLEX) + ecmd->duplex = DUPLEX_FULL; + else + ecmd->duplex = DUPLEX_HALF; + + if (link & LNK_NEGOTIATE) + ecmd->autoneg = AUTONEG_ENABLE; + else + ecmd->autoneg = AUTONEG_DISABLE; + +#if 0 + /* + * Current struct ethtool_cmd is insufficient + */ + ecmd->trace = readl(®s->TuneTrace); + + ecmd->txcoal = readl(®s->TuneTxCoalTicks); + ecmd->rxcoal = readl(®s->TuneRxCoalTicks); +#endif + ecmd->maxtxpkt = readl(®s->TuneMaxTxDesc); + ecmd->maxrxpkt = readl(®s->TuneMaxRxDesc); + + return 0; +} + +static int ace_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd) +{ + struct ace_private *ap = netdev_priv(dev); + struct ace_regs __iomem *regs = ap->regs; + u32 link, speed; + + link = readl(®s->GigLnkState); + if (link & LNK_1000MB) + speed = SPEED_1000; + else { + link = readl(®s->FastLnkState); + if (link & LNK_100MB) + speed = SPEED_100; + else if (link & LNK_10MB) + speed = SPEED_10; + else + speed = SPEED_100; + } + + link = LNK_ENABLE | LNK_1000MB | LNK_100MB | LNK_10MB | + LNK_RX_FLOW_CTL_Y | LNK_NEG_FCTL; + if (!ACE_IS_TIGON_I(ap)) + link |= LNK_TX_FLOW_CTL_Y; + if (ecmd->autoneg == AUTONEG_ENABLE) + link |= LNK_NEGOTIATE; + if (ethtool_cmd_speed(ecmd) != speed) { + link &= ~(LNK_1000MB | LNK_100MB | LNK_10MB); + switch (ethtool_cmd_speed(ecmd)) { + case SPEED_1000: + link |= LNK_1000MB; + break; + case SPEED_100: + link |= LNK_100MB; + break; + case SPEED_10: + link |= LNK_10MB; + break; + } + } + + if (ecmd->duplex == DUPLEX_FULL) + link |= LNK_FULL_DUPLEX; + + if (link != ap->link) { + struct cmd cmd; + printk(KERN_INFO "%s: Renegotiating link state\n", + dev->name); + + ap->link = link; + writel(link, ®s->TuneLink); + if (!ACE_IS_TIGON_I(ap)) + writel(link, ®s->TuneFastLink); + wmb(); + + cmd.evt = C_LNK_NEGOTIATION; + cmd.code = 0; + cmd.idx = 0; + ace_issue_cmd(regs, &cmd); + } + return 0; +} + +static void ace_get_drvinfo(struct net_device *dev, + struct ethtool_drvinfo *info) +{ + struct ace_private *ap = netdev_priv(dev); + + strlcpy(info->driver, "acenic", sizeof(info->driver)); + snprintf(info->version, sizeof(info->version), "%i.%i.%i", + ap->firmware_major, ap->firmware_minor, + ap->firmware_fix); + + if (ap->pdev) + strlcpy(info->bus_info, pci_name(ap->pdev), + sizeof(info->bus_info)); + +} + +/* + * Set the hardware MAC address. + */ +static int ace_set_mac_addr(struct net_device *dev, void *p) +{ + struct ace_private *ap = netdev_priv(dev); + struct ace_regs __iomem *regs = ap->regs; + struct sockaddr *addr=p; + u8 *da; + struct cmd cmd; + + if(netif_running(dev)) + return -EBUSY; + + memcpy(dev->dev_addr, addr->sa_data,dev->addr_len); + + da = (u8 *)dev->dev_addr; + + writel(da[0] << 8 | da[1], ®s->MacAddrHi); + writel((da[2] << 24) | (da[3] << 16) | (da[4] << 8) | da[5], + ®s->MacAddrLo); + + cmd.evt = C_SET_MAC_ADDR; + cmd.code = 0; + cmd.idx = 0; + ace_issue_cmd(regs, &cmd); + + return 0; +} + + +static void ace_set_multicast_list(struct net_device *dev) +{ + struct ace_private *ap = netdev_priv(dev); + struct ace_regs __iomem *regs = ap->regs; + struct cmd cmd; + + if ((dev->flags & IFF_ALLMULTI) && !(ap->mcast_all)) { + cmd.evt = C_SET_MULTICAST_MODE; + cmd.code = C_C_MCAST_ENABLE; + cmd.idx = 0; + ace_issue_cmd(regs, &cmd); + ap->mcast_all = 1; + } else if (ap->mcast_all) { + cmd.evt = C_SET_MULTICAST_MODE; + cmd.code = C_C_MCAST_DISABLE; + cmd.idx = 0; + ace_issue_cmd(regs, &cmd); + ap->mcast_all = 0; + } + + if ((dev->flags & IFF_PROMISC) && !(ap->promisc)) { + cmd.evt = C_SET_PROMISC_MODE; + cmd.code = C_C_PROMISC_ENABLE; + cmd.idx = 0; + ace_issue_cmd(regs, &cmd); + ap->promisc = 1; + }else if (!(dev->flags & IFF_PROMISC) && (ap->promisc)) { + cmd.evt = C_SET_PROMISC_MODE; + cmd.code = C_C_PROMISC_DISABLE; + cmd.idx = 0; + ace_issue_cmd(regs, &cmd); + ap->promisc = 0; + } + + /* + * For the time being multicast relies on the upper layers + * filtering it properly. The Firmware does not allow one to + * set the entire multicast list at a time and keeping track of + * it here is going to be messy. + */ + if (!netdev_mc_empty(dev) && !ap->mcast_all) { + cmd.evt = C_SET_MULTICAST_MODE; + cmd.code = C_C_MCAST_ENABLE; + cmd.idx = 0; + ace_issue_cmd(regs, &cmd); + }else if (!ap->mcast_all) { + cmd.evt = C_SET_MULTICAST_MODE; + cmd.code = C_C_MCAST_DISABLE; + cmd.idx = 0; + ace_issue_cmd(regs, &cmd); + } +} + + +static struct net_device_stats *ace_get_stats(struct net_device *dev) +{ + struct ace_private *ap = netdev_priv(dev); + struct ace_mac_stats __iomem *mac_stats = + (struct ace_mac_stats __iomem *)ap->regs->Stats; + + dev->stats.rx_missed_errors = readl(&mac_stats->drop_space); + dev->stats.multicast = readl(&mac_stats->kept_mc); + dev->stats.collisions = readl(&mac_stats->coll); + + return &dev->stats; +} + + +static void __devinit ace_copy(struct ace_regs __iomem *regs, const __be32 *src, + u32 dest, int size) +{ + void __iomem *tdest; + short tsize, i; + + if (size <= 0) + return; + + while (size > 0) { + tsize = min_t(u32, ((~dest & (ACE_WINDOW_SIZE - 1)) + 1), + min_t(u32, size, ACE_WINDOW_SIZE)); + tdest = (void __iomem *) ®s->Window + + (dest & (ACE_WINDOW_SIZE - 1)); + writel(dest & ~(ACE_WINDOW_SIZE - 1), ®s->WinBase); + for (i = 0; i < (tsize / 4); i++) { + /* Firmware is big-endian */ + writel(be32_to_cpup(src), tdest); + src++; + tdest += 4; + dest += 4; + size -= 4; + } + } +} + + +static void __devinit ace_clear(struct ace_regs __iomem *regs, u32 dest, int size) +{ + void __iomem *tdest; + short tsize = 0, i; + + if (size <= 0) + return; + + while (size > 0) { + tsize = min_t(u32, ((~dest & (ACE_WINDOW_SIZE - 1)) + 1), + min_t(u32, size, ACE_WINDOW_SIZE)); + tdest = (void __iomem *) ®s->Window + + (dest & (ACE_WINDOW_SIZE - 1)); + writel(dest & ~(ACE_WINDOW_SIZE - 1), ®s->WinBase); + + for (i = 0; i < (tsize / 4); i++) { + writel(0, tdest + i*4); + } + + dest += tsize; + size -= tsize; + } +} + + +/* + * Download the firmware into the SRAM on the NIC + * + * This operation requires the NIC to be halted and is performed with + * interrupts disabled and with the spinlock hold. + */ +static int __devinit ace_load_firmware(struct net_device *dev) +{ + const struct firmware *fw; + const char *fw_name = "acenic/tg2.bin"; + struct ace_private *ap = netdev_priv(dev); + struct ace_regs __iomem *regs = ap->regs; + const __be32 *fw_data; + u32 load_addr; + int ret; + + if (!(readl(®s->CpuCtrl) & CPU_HALTED)) { + printk(KERN_ERR "%s: trying to download firmware while the " + "CPU is running!\n", ap->name); + return -EFAULT; + } + + if (ACE_IS_TIGON_I(ap)) + fw_name = "acenic/tg1.bin"; + + ret = request_firmware(&fw, fw_name, &ap->pdev->dev); + if (ret) { + printk(KERN_ERR "%s: Failed to load firmware \"%s\"\n", + ap->name, fw_name); + return ret; + } + + fw_data = (void *)fw->data; + + /* Firmware blob starts with version numbers, followed by + load and start address. Remainder is the blob to be loaded + contiguously from load address. We don't bother to represent + the BSS/SBSS sections any more, since we were clearing the + whole thing anyway. */ + ap->firmware_major = fw->data[0]; + ap->firmware_minor = fw->data[1]; + ap->firmware_fix = fw->data[2]; + + ap->firmware_start = be32_to_cpu(fw_data[1]); + if (ap->firmware_start < 0x4000 || ap->firmware_start >= 0x80000) { + printk(KERN_ERR "%s: bogus load address %08x in \"%s\"\n", + ap->name, ap->firmware_start, fw_name); + ret = -EINVAL; + goto out; + } + + load_addr = be32_to_cpu(fw_data[2]); + if (load_addr < 0x4000 || load_addr >= 0x80000) { + printk(KERN_ERR "%s: bogus load address %08x in \"%s\"\n", + ap->name, load_addr, fw_name); + ret = -EINVAL; + goto out; + } + + /* + * Do not try to clear more than 512KiB or we end up seeing + * funny things on NICs with only 512KiB SRAM + */ + ace_clear(regs, 0x2000, 0x80000-0x2000); + ace_copy(regs, &fw_data[3], load_addr, fw->size-12); + out: + release_firmware(fw); + return ret; +} + + +/* + * The eeprom on the AceNIC is an Atmel i2c EEPROM. + * + * Accessing the EEPROM is `interesting' to say the least - don't read + * this code right after dinner. + * + * This is all about black magic and bit-banging the device .... I + * wonder in what hospital they have put the guy who designed the i2c + * specs. + * + * Oh yes, this is only the beginning! + * + * Thanks to Stevarino Webinski for helping tracking down the bugs in the + * code i2c readout code by beta testing all my hacks. + */ +static void __devinit eeprom_start(struct ace_regs __iomem *regs) +{ + u32 local; + + readl(®s->LocalCtrl); + udelay(ACE_SHORT_DELAY); + local = readl(®s->LocalCtrl); + local |= EEPROM_DATA_OUT | EEPROM_WRITE_ENABLE; + writel(local, ®s->LocalCtrl); + readl(®s->LocalCtrl); + mb(); + udelay(ACE_SHORT_DELAY); + local |= EEPROM_CLK_OUT; + writel(local, ®s->LocalCtrl); + readl(®s->LocalCtrl); + mb(); + udelay(ACE_SHORT_DELAY); + local &= ~EEPROM_DATA_OUT; + writel(local, ®s->LocalCtrl); + readl(®s->LocalCtrl); + mb(); + udelay(ACE_SHORT_DELAY); + local &= ~EEPROM_CLK_OUT; + writel(local, ®s->LocalCtrl); + readl(®s->LocalCtrl); + mb(); +} + + +static void __devinit eeprom_prep(struct ace_regs __iomem *regs, u8 magic) +{ + short i; + u32 local; + + udelay(ACE_SHORT_DELAY); + local = readl(®s->LocalCtrl); + local &= ~EEPROM_DATA_OUT; + local |= EEPROM_WRITE_ENABLE; + writel(local, ®s->LocalCtrl); + readl(®s->LocalCtrl); + mb(); + + for (i = 0; i < 8; i++, magic <<= 1) { + udelay(ACE_SHORT_DELAY); + if (magic & 0x80) + local |= EEPROM_DATA_OUT; + else + local &= ~EEPROM_DATA_OUT; + writel(local, ®s->LocalCtrl); + readl(®s->LocalCtrl); + mb(); + + udelay(ACE_SHORT_DELAY); + local |= EEPROM_CLK_OUT; + writel(local, ®s->LocalCtrl); + readl(®s->LocalCtrl); + mb(); + udelay(ACE_SHORT_DELAY); + local &= ~(EEPROM_CLK_OUT | EEPROM_DATA_OUT); + writel(local, ®s->LocalCtrl); + readl(®s->LocalCtrl); + mb(); + } +} + + +static int __devinit eeprom_check_ack(struct ace_regs __iomem *regs) +{ + int state; + u32 local; + + local = readl(®s->LocalCtrl); + local &= ~EEPROM_WRITE_ENABLE; + writel(local, ®s->LocalCtrl); + readl(®s->LocalCtrl); + mb(); + udelay(ACE_LONG_DELAY); + local |= EEPROM_CLK_OUT; + writel(local, ®s->LocalCtrl); + readl(®s->LocalCtrl); + mb(); + udelay(ACE_SHORT_DELAY); + /* sample data in middle of high clk */ + state = (readl(®s->LocalCtrl) & EEPROM_DATA_IN) != 0; + udelay(ACE_SHORT_DELAY); + mb(); + writel(readl(®s->LocalCtrl) & ~EEPROM_CLK_OUT, ®s->LocalCtrl); + readl(®s->LocalCtrl); + mb(); + + return state; +} + + +static void __devinit eeprom_stop(struct ace_regs __iomem *regs) +{ + u32 local; + + udelay(ACE_SHORT_DELAY); + local = readl(®s->LocalCtrl); + local |= EEPROM_WRITE_ENABLE; + writel(local, ®s->LocalCtrl); + readl(®s->LocalCtrl); + mb(); + udelay(ACE_SHORT_DELAY); + local &= ~EEPROM_DATA_OUT; + writel(local, ®s->LocalCtrl); + readl(®s->LocalCtrl); + mb(); + udelay(ACE_SHORT_DELAY); + local |= EEPROM_CLK_OUT; + writel(local, ®s->LocalCtrl); + readl(®s->LocalCtrl); + mb(); + udelay(ACE_SHORT_DELAY); + local |= EEPROM_DATA_OUT; + writel(local, ®s->LocalCtrl); + readl(®s->LocalCtrl); + mb(); + udelay(ACE_LONG_DELAY); + local &= ~EEPROM_CLK_OUT; + writel(local, ®s->LocalCtrl); + mb(); +} + + +/* + * Read a whole byte from the EEPROM. + */ +static int __devinit read_eeprom_byte(struct net_device *dev, + unsigned long offset) +{ + struct ace_private *ap = netdev_priv(dev); + struct ace_regs __iomem *regs = ap->regs; + unsigned long flags; + u32 local; + int result = 0; + short i; + + /* + * Don't take interrupts on this CPU will bit banging + * the %#%#@$ I2C device + */ + local_irq_save(flags); + + eeprom_start(regs); + + eeprom_prep(regs, EEPROM_WRITE_SELECT); + if (eeprom_check_ack(regs)) { + local_irq_restore(flags); + printk(KERN_ERR "%s: Unable to sync eeprom\n", ap->name); + result = -EIO; + goto eeprom_read_error; + } + + eeprom_prep(regs, (offset >> 8) & 0xff); + if (eeprom_check_ack(regs)) { + local_irq_restore(flags); + printk(KERN_ERR "%s: Unable to set address byte 0\n", + ap->name); + result = -EIO; + goto eeprom_read_error; + } + + eeprom_prep(regs, offset & 0xff); + if (eeprom_check_ack(regs)) { + local_irq_restore(flags); + printk(KERN_ERR "%s: Unable to set address byte 1\n", + ap->name); + result = -EIO; + goto eeprom_read_error; + } + + eeprom_start(regs); + eeprom_prep(regs, EEPROM_READ_SELECT); + if (eeprom_check_ack(regs)) { + local_irq_restore(flags); + printk(KERN_ERR "%s: Unable to set READ_SELECT\n", + ap->name); + result = -EIO; + goto eeprom_read_error; + } + + for (i = 0; i < 8; i++) { + local = readl(®s->LocalCtrl); + local &= ~EEPROM_WRITE_ENABLE; + writel(local, ®s->LocalCtrl); + readl(®s->LocalCtrl); + udelay(ACE_LONG_DELAY); + mb(); + local |= EEPROM_CLK_OUT; + writel(local, ®s->LocalCtrl); + readl(®s->LocalCtrl); + mb(); + udelay(ACE_SHORT_DELAY); + /* sample data mid high clk */ + result = (result << 1) | + ((readl(®s->LocalCtrl) & EEPROM_DATA_IN) != 0); + udelay(ACE_SHORT_DELAY); + mb(); + local = readl(®s->LocalCtrl); + local &= ~EEPROM_CLK_OUT; + writel(local, ®s->LocalCtrl); + readl(®s->LocalCtrl); + udelay(ACE_SHORT_DELAY); + mb(); + if (i == 7) { + local |= EEPROM_WRITE_ENABLE; + writel(local, ®s->LocalCtrl); + readl(®s->LocalCtrl); + mb(); + udelay(ACE_SHORT_DELAY); + } + } + + local |= EEPROM_DATA_OUT; + writel(local, ®s->LocalCtrl); + readl(®s->LocalCtrl); + mb(); + udelay(ACE_SHORT_DELAY); + writel(readl(®s->LocalCtrl) | EEPROM_CLK_OUT, ®s->LocalCtrl); + readl(®s->LocalCtrl); + udelay(ACE_LONG_DELAY); + writel(readl(®s->LocalCtrl) & ~EEPROM_CLK_OUT, ®s->LocalCtrl); + readl(®s->LocalCtrl); + mb(); + udelay(ACE_SHORT_DELAY); + eeprom_stop(regs); + + local_irq_restore(flags); + out: + return result; + + eeprom_read_error: + printk(KERN_ERR "%s: Unable to read eeprom byte 0x%02lx\n", + ap->name, offset); + goto out; +} diff --git a/drivers/net/ethernet/alteon/acenic.h b/drivers/net/ethernet/alteon/acenic.h new file mode 100644 index 000000000000..51c486cfbb8c --- /dev/null +++ b/drivers/net/ethernet/alteon/acenic.h @@ -0,0 +1,790 @@ +#ifndef _ACENIC_H_ +#define _ACENIC_H_ +#include + + +/* + * Generate TX index update each time, when TX ring is closed. + * Normally, this is not useful, because results in more dma (and irqs + * without TX_COAL_INTS_ONLY). + */ +#define USE_TX_COAL_NOW 0 + +/* + * Addressing: + * + * The Tigon uses 64-bit host addresses, regardless of their actual + * length, and it expects a big-endian format. For 32 bit systems the + * upper 32 bits of the address are simply ignored (zero), however for + * little endian 64 bit systems (Alpha) this looks strange with the + * two parts of the address word being swapped. + * + * The addresses are split in two 32 bit words for all architectures + * as some of them are in PCI shared memory and it is necessary to use + * readl/writel to access them. + * + * The addressing code is derived from Pete Wyckoff's work, but + * modified to deal properly with readl/writel usage. + */ + +struct ace_regs { + u32 pad0[16]; /* PCI control registers */ + + u32 HostCtrl; /* 0x40 */ + u32 LocalCtrl; + + u32 pad1[2]; + + u32 MiscCfg; /* 0x50 */ + + u32 pad2[2]; + + u32 PciState; + + u32 pad3[2]; /* 0x60 */ + + u32 WinBase; + u32 WinData; + + u32 pad4[12]; /* 0x70 */ + + u32 DmaWriteState; /* 0xa0 */ + u32 pad5[3]; + u32 DmaReadState; /* 0xb0 */ + + u32 pad6[26]; + + u32 AssistState; + + u32 pad7[8]; /* 0x120 */ + + u32 CpuCtrl; /* 0x140 */ + u32 Pc; + + u32 pad8[3]; + + u32 SramAddr; /* 0x154 */ + u32 SramData; + + u32 pad9[49]; + + u32 MacRxState; /* 0x220 */ + + u32 pad10[7]; + + u32 CpuBCtrl; /* 0x240 */ + u32 PcB; + + u32 pad11[3]; + + u32 SramBAddr; /* 0x254 */ + u32 SramBData; + + u32 pad12[105]; + + u32 pad13[32]; /* 0x400 */ + u32 Stats[32]; + + u32 Mb0Hi; /* 0x500 */ + u32 Mb0Lo; + u32 Mb1Hi; + u32 CmdPrd; + u32 Mb2Hi; + u32 TxPrd; + u32 Mb3Hi; + u32 RxStdPrd; + u32 Mb4Hi; + u32 RxJumboPrd; + u32 Mb5Hi; + u32 RxMiniPrd; + u32 Mb6Hi; + u32 Mb6Lo; + u32 Mb7Hi; + u32 Mb7Lo; + u32 Mb8Hi; + u32 Mb8Lo; + u32 Mb9Hi; + u32 Mb9Lo; + u32 MbAHi; + u32 MbALo; + u32 MbBHi; + u32 MbBLo; + u32 MbCHi; + u32 MbCLo; + u32 MbDHi; + u32 MbDLo; + u32 MbEHi; + u32 MbELo; + u32 MbFHi; + u32 MbFLo; + + u32 pad14[32]; + + u32 MacAddrHi; /* 0x600 */ + u32 MacAddrLo; + u32 InfoPtrHi; + u32 InfoPtrLo; + u32 MultiCastHi; /* 0x610 */ + u32 MultiCastLo; + u32 ModeStat; + u32 DmaReadCfg; + u32 DmaWriteCfg; /* 0x620 */ + u32 TxBufRat; + u32 EvtCsm; + u32 CmdCsm; + u32 TuneRxCoalTicks;/* 0x630 */ + u32 TuneTxCoalTicks; + u32 TuneStatTicks; + u32 TuneMaxTxDesc; + u32 TuneMaxRxDesc; /* 0x640 */ + u32 TuneTrace; + u32 TuneLink; + u32 TuneFastLink; + u32 TracePtr; /* 0x650 */ + u32 TraceStrt; + u32 TraceLen; + u32 IfIdx; + u32 IfMtu; /* 0x660 */ + u32 MaskInt; + u32 GigLnkState; + u32 FastLnkState; + u32 pad16[4]; /* 0x670 */ + u32 RxRetCsm; /* 0x680 */ + + u32 pad17[31]; + + u32 CmdRng[64]; /* 0x700 */ + u32 Window[0x200]; +}; + + +typedef struct { + u32 addrhi; + u32 addrlo; +} aceaddr; + + +#define ACE_WINDOW_SIZE 0x800 + +#define ACE_JUMBO_MTU 9000 +#define ACE_STD_MTU 1500 + +#define ACE_TRACE_SIZE 0x8000 + +/* + * Host control register bits. + */ + +#define IN_INT 0x01 +#define CLR_INT 0x02 +#define HW_RESET 0x08 +#define BYTE_SWAP 0x10 +#define WORD_SWAP 0x20 +#define MASK_INTS 0x40 + +/* + * Local control register bits. + */ + +#define EEPROM_DATA_IN 0x800000 +#define EEPROM_DATA_OUT 0x400000 +#define EEPROM_WRITE_ENABLE 0x200000 +#define EEPROM_CLK_OUT 0x100000 + +#define EEPROM_BASE 0xa0000000 + +#define EEPROM_WRITE_SELECT 0xa0 +#define EEPROM_READ_SELECT 0xa1 + +#define SRAM_BANK_512K 0x200 + + +/* + * udelay() values for when clocking the eeprom + */ +#define ACE_SHORT_DELAY 2 +#define ACE_LONG_DELAY 4 + + +/* + * Misc Config bits + */ + +#define SYNC_SRAM_TIMING 0x100000 + + +/* + * CPU state bits. + */ + +#define CPU_RESET 0x01 +#define CPU_TRACE 0x02 +#define CPU_PROM_FAILED 0x10 +#define CPU_HALT 0x00010000 +#define CPU_HALTED 0xffff0000 + + +/* + * PCI State bits. + */ + +#define DMA_READ_MAX_4 0x04 +#define DMA_READ_MAX_16 0x08 +#define DMA_READ_MAX_32 0x0c +#define DMA_READ_MAX_64 0x10 +#define DMA_READ_MAX_128 0x14 +#define DMA_READ_MAX_256 0x18 +#define DMA_READ_MAX_1K 0x1c +#define DMA_WRITE_MAX_4 0x20 +#define DMA_WRITE_MAX_16 0x40 +#define DMA_WRITE_MAX_32 0x60 +#define DMA_WRITE_MAX_64 0x80 +#define DMA_WRITE_MAX_128 0xa0 +#define DMA_WRITE_MAX_256 0xc0 +#define DMA_WRITE_MAX_1K 0xe0 +#define DMA_READ_WRITE_MASK 0xfc +#define MEM_READ_MULTIPLE 0x00020000 +#define PCI_66MHZ 0x00080000 +#define PCI_32BIT 0x00100000 +#define DMA_WRITE_ALL_ALIGN 0x00800000 +#define READ_CMD_MEM 0x06000000 +#define WRITE_CMD_MEM 0x70000000 + + +/* + * Mode status + */ + +#define ACE_BYTE_SWAP_BD 0x02 +#define ACE_WORD_SWAP_BD 0x04 /* not actually used */ +#define ACE_WARN 0x08 +#define ACE_BYTE_SWAP_DMA 0x10 +#define ACE_NO_JUMBO_FRAG 0x200 +#define ACE_FATAL 0x40000000 + + +/* + * DMA config + */ + +#define DMA_THRESH_1W 0x10 +#define DMA_THRESH_2W 0x20 +#define DMA_THRESH_4W 0x40 +#define DMA_THRESH_8W 0x80 +#define DMA_THRESH_16W 0x100 +#define DMA_THRESH_32W 0x0 /* not described in doc, but exists. */ + + +/* + * Tuning parameters + */ + +#define TICKS_PER_SEC 1000000 + + +/* + * Link bits + */ + +#define LNK_PREF 0x00008000 +#define LNK_10MB 0x00010000 +#define LNK_100MB 0x00020000 +#define LNK_1000MB 0x00040000 +#define LNK_FULL_DUPLEX 0x00080000 +#define LNK_HALF_DUPLEX 0x00100000 +#define LNK_TX_FLOW_CTL_Y 0x00200000 +#define LNK_NEG_ADVANCED 0x00400000 +#define LNK_RX_FLOW_CTL_Y 0x00800000 +#define LNK_NIC 0x01000000 +#define LNK_JAM 0x02000000 +#define LNK_JUMBO 0x04000000 +#define LNK_ALTEON 0x08000000 +#define LNK_NEG_FCTL 0x10000000 +#define LNK_NEGOTIATE 0x20000000 +#define LNK_ENABLE 0x40000000 +#define LNK_UP 0x80000000 + + +/* + * Event definitions + */ + +#define EVT_RING_ENTRIES 256 +#define EVT_RING_SIZE (EVT_RING_ENTRIES * sizeof(struct event)) + +struct event { +#ifdef __LITTLE_ENDIAN_BITFIELD + u32 idx:12; + u32 code:12; + u32 evt:8; +#else + u32 evt:8; + u32 code:12; + u32 idx:12; +#endif + u32 pad; +}; + + +/* + * Events + */ + +#define E_FW_RUNNING 0x01 +#define E_STATS_UPDATED 0x04 + +#define E_STATS_UPDATE 0x04 + +#define E_LNK_STATE 0x06 +#define E_C_LINK_UP 0x01 +#define E_C_LINK_DOWN 0x02 +#define E_C_LINK_10_100 0x03 + +#define E_ERROR 0x07 +#define E_C_ERR_INVAL_CMD 0x01 +#define E_C_ERR_UNIMP_CMD 0x02 +#define E_C_ERR_BAD_CFG 0x03 + +#define E_MCAST_LIST 0x08 +#define E_C_MCAST_ADDR_ADD 0x01 +#define E_C_MCAST_ADDR_DEL 0x02 + +#define E_RESET_JUMBO_RNG 0x09 + + +/* + * Commands + */ + +#define CMD_RING_ENTRIES 64 + +struct cmd { +#ifdef __LITTLE_ENDIAN_BITFIELD + u32 idx:12; + u32 code:12; + u32 evt:8; +#else + u32 evt:8; + u32 code:12; + u32 idx:12; +#endif +}; + + +#define C_HOST_STATE 0x01 +#define C_C_STACK_UP 0x01 +#define C_C_STACK_DOWN 0x02 + +#define C_FDR_FILTERING 0x02 +#define C_C_FDR_FILT_ENABLE 0x01 +#define C_C_FDR_FILT_DISABLE 0x02 + +#define C_SET_RX_PRD_IDX 0x03 +#define C_UPDATE_STATS 0x04 +#define C_RESET_JUMBO_RNG 0x05 +#define C_ADD_MULTICAST_ADDR 0x08 +#define C_DEL_MULTICAST_ADDR 0x09 + +#define C_SET_PROMISC_MODE 0x0a +#define C_C_PROMISC_ENABLE 0x01 +#define C_C_PROMISC_DISABLE 0x02 + +#define C_LNK_NEGOTIATION 0x0b +#define C_C_NEGOTIATE_BOTH 0x00 +#define C_C_NEGOTIATE_GIG 0x01 +#define C_C_NEGOTIATE_10_100 0x02 + +#define C_SET_MAC_ADDR 0x0c +#define C_CLEAR_PROFILE 0x0d + +#define C_SET_MULTICAST_MODE 0x0e +#define C_C_MCAST_ENABLE 0x01 +#define C_C_MCAST_DISABLE 0x02 + +#define C_CLEAR_STATS 0x0f +#define C_SET_RX_JUMBO_PRD_IDX 0x10 +#define C_REFRESH_STATS 0x11 + + +/* + * Descriptor flags + */ +#define BD_FLG_TCP_UDP_SUM 0x01 +#define BD_FLG_IP_SUM 0x02 +#define BD_FLG_END 0x04 +#define BD_FLG_MORE 0x08 +#define BD_FLG_JUMBO 0x10 +#define BD_FLG_UCAST 0x20 +#define BD_FLG_MCAST 0x40 +#define BD_FLG_BCAST 0x60 +#define BD_FLG_TYP_MASK 0x60 +#define BD_FLG_IP_FRAG 0x80 +#define BD_FLG_IP_FRAG_END 0x100 +#define BD_FLG_VLAN_TAG 0x200 +#define BD_FLG_FRAME_ERROR 0x400 +#define BD_FLG_COAL_NOW 0x800 +#define BD_FLG_MINI 0x1000 + + +/* + * Ring Control block flags + */ +#define RCB_FLG_TCP_UDP_SUM 0x01 +#define RCB_FLG_IP_SUM 0x02 +#define RCB_FLG_NO_PSEUDO_HDR 0x08 +#define RCB_FLG_VLAN_ASSIST 0x10 +#define RCB_FLG_COAL_INT_ONLY 0x20 +#define RCB_FLG_TX_HOST_RING 0x40 +#define RCB_FLG_IEEE_SNAP_SUM 0x80 +#define RCB_FLG_EXT_RX_BD 0x100 +#define RCB_FLG_RNG_DISABLE 0x200 + + +/* + * TX ring - maximum TX ring entries for Tigon I's is 128 + */ +#define MAX_TX_RING_ENTRIES 256 +#define TIGON_I_TX_RING_ENTRIES 128 +#define TX_RING_SIZE (MAX_TX_RING_ENTRIES * sizeof(struct tx_desc)) +#define TX_RING_BASE 0x3800 + +struct tx_desc{ + aceaddr addr; + u32 flagsize; +#if 0 +/* + * This is in PCI shared mem and must be accessed with readl/writel + * real layout is: + */ +#if __LITTLE_ENDIAN + u16 flags; + u16 size; + u16 vlan; + u16 reserved; +#else + u16 size; + u16 flags; + u16 reserved; + u16 vlan; +#endif +#endif + u32 vlanres; +}; + + +#define RX_STD_RING_ENTRIES 512 +#define RX_STD_RING_SIZE (RX_STD_RING_ENTRIES * sizeof(struct rx_desc)) + +#define RX_JUMBO_RING_ENTRIES 256 +#define RX_JUMBO_RING_SIZE (RX_JUMBO_RING_ENTRIES *sizeof(struct rx_desc)) + +#define RX_MINI_RING_ENTRIES 1024 +#define RX_MINI_RING_SIZE (RX_MINI_RING_ENTRIES *sizeof(struct rx_desc)) + +#define RX_RETURN_RING_ENTRIES 2048 +#define RX_RETURN_RING_SIZE (RX_MAX_RETURN_RING_ENTRIES * \ + sizeof(struct rx_desc)) + +struct rx_desc{ + aceaddr addr; +#ifdef __LITTLE_ENDIAN + u16 size; + u16 idx; +#else + u16 idx; + u16 size; +#endif +#ifdef __LITTLE_ENDIAN + u16 flags; + u16 type; +#else + u16 type; + u16 flags; +#endif +#ifdef __LITTLE_ENDIAN + u16 tcp_udp_csum; + u16 ip_csum; +#else + u16 ip_csum; + u16 tcp_udp_csum; +#endif +#ifdef __LITTLE_ENDIAN + u16 vlan; + u16 err_flags; +#else + u16 err_flags; + u16 vlan; +#endif + u32 reserved; + u32 opague; +}; + + +/* + * This struct is shared with the NIC firmware. + */ +struct ring_ctrl { + aceaddr rngptr; +#ifdef __LITTLE_ENDIAN + u16 flags; + u16 max_len; +#else + u16 max_len; + u16 flags; +#endif + u32 pad; +}; + + +struct ace_mac_stats { + u32 excess_colls; + u32 coll_1; + u32 coll_2; + u32 coll_3; + u32 coll_4; + u32 coll_5; + u32 coll_6; + u32 coll_7; + u32 coll_8; + u32 coll_9; + u32 coll_10; + u32 coll_11; + u32 coll_12; + u32 coll_13; + u32 coll_14; + u32 coll_15; + u32 late_coll; + u32 defers; + u32 crc_err; + u32 underrun; + u32 crs_err; + u32 pad[3]; + u32 drop_ula; + u32 drop_mc; + u32 drop_fc; + u32 drop_space; + u32 coll; + u32 kept_bc; + u32 kept_mc; + u32 kept_uc; +}; + + +struct ace_info { + union { + u32 stats[256]; + } s; + struct ring_ctrl evt_ctrl; + struct ring_ctrl cmd_ctrl; + struct ring_ctrl tx_ctrl; + struct ring_ctrl rx_std_ctrl; + struct ring_ctrl rx_jumbo_ctrl; + struct ring_ctrl rx_mini_ctrl; + struct ring_ctrl rx_return_ctrl; + aceaddr evt_prd_ptr; + aceaddr rx_ret_prd_ptr; + aceaddr tx_csm_ptr; + aceaddr stats2_ptr; +}; + + +struct ring_info { + struct sk_buff *skb; + DEFINE_DMA_UNMAP_ADDR(mapping); +}; + + +/* + * Funny... As soon as we add maplen on alpha, it starts to work + * much slower. Hmm... is it because struct does not fit to one cacheline? + * So, split tx_ring_info. + */ +struct tx_ring_info { + struct sk_buff *skb; + DEFINE_DMA_UNMAP_ADDR(mapping); + DEFINE_DMA_UNMAP_LEN(maplen); +}; + + +/* + * struct ace_skb holding the rings of skb's. This is an awful lot of + * pointers, but I don't see any other smart mode to do this in an + * efficient manner ;-( + */ +struct ace_skb +{ + struct tx_ring_info tx_skbuff[MAX_TX_RING_ENTRIES]; + struct ring_info rx_std_skbuff[RX_STD_RING_ENTRIES]; + struct ring_info rx_mini_skbuff[RX_MINI_RING_ENTRIES]; + struct ring_info rx_jumbo_skbuff[RX_JUMBO_RING_ENTRIES]; +}; + + +/* + * Struct private for the AceNIC. + * + * Elements are grouped so variables used by the tx handling goes + * together, and will go into the same cache lines etc. in order to + * avoid cache line contention between the rx and tx handling on SMP. + * + * Frequently accessed variables are put at the beginning of the + * struct to help the compiler generate better/shorter code. + */ +struct ace_private +{ + struct ace_info *info; + struct ace_regs __iomem *regs; /* register base */ + struct ace_skb *skb; + dma_addr_t info_dma; /* 32/64 bit */ + + int version, link; + int promisc, mcast_all; + + /* + * TX elements + */ + struct tx_desc *tx_ring; + u32 tx_prd; + volatile u32 tx_ret_csm; + int tx_ring_entries; + + /* + * RX elements + */ + unsigned long std_refill_busy + __attribute__ ((aligned (SMP_CACHE_BYTES))); + unsigned long mini_refill_busy, jumbo_refill_busy; + atomic_t cur_rx_bufs; + atomic_t cur_mini_bufs; + atomic_t cur_jumbo_bufs; + u32 rx_std_skbprd, rx_mini_skbprd, rx_jumbo_skbprd; + u32 cur_rx; + + struct rx_desc *rx_std_ring; + struct rx_desc *rx_jumbo_ring; + struct rx_desc *rx_mini_ring; + struct rx_desc *rx_return_ring; + + int tasklet_pending, jumbo; + struct tasklet_struct ace_tasklet; + + struct event *evt_ring; + + volatile u32 *evt_prd, *rx_ret_prd, *tx_csm; + + dma_addr_t tx_ring_dma; /* 32/64 bit */ + dma_addr_t rx_ring_base_dma; + dma_addr_t evt_ring_dma; + dma_addr_t evt_prd_dma, rx_ret_prd_dma, tx_csm_dma; + + unsigned char *trace_buf; + struct pci_dev *pdev; + struct net_device *next; + volatile int fw_running; + int board_idx; + u16 pci_command; + u8 pci_latency; + const char *name; +#ifdef INDEX_DEBUG + spinlock_t debug_lock + __attribute__ ((aligned (SMP_CACHE_BYTES))); + u32 last_tx, last_std_rx, last_mini_rx; +#endif + int pci_using_dac; + u8 firmware_major; + u8 firmware_minor; + u8 firmware_fix; + u32 firmware_start; +}; + + +#define TX_RESERVED MAX_SKB_FRAGS + +static inline int tx_space (struct ace_private *ap, u32 csm, u32 prd) +{ + return (csm - prd - 1) & (ACE_TX_RING_ENTRIES(ap) - 1); +} + +#define tx_free(ap) tx_space((ap)->tx_ret_csm, (ap)->tx_prd, ap) +#define tx_ring_full(ap, csm, prd) (tx_space(ap, csm, prd) <= TX_RESERVED) + +static inline void set_aceaddr(aceaddr *aa, dma_addr_t addr) +{ + u64 baddr = (u64) addr; + aa->addrlo = baddr & 0xffffffff; + aa->addrhi = baddr >> 32; + wmb(); +} + + +static inline void ace_set_txprd(struct ace_regs __iomem *regs, + struct ace_private *ap, u32 value) +{ +#ifdef INDEX_DEBUG + unsigned long flags; + spin_lock_irqsave(&ap->debug_lock, flags); + writel(value, ®s->TxPrd); + if (value == ap->last_tx) + printk(KERN_ERR "AceNIC RACE ALERT! writing identical value " + "to tx producer (%i)\n", value); + ap->last_tx = value; + spin_unlock_irqrestore(&ap->debug_lock, flags); +#else + writel(value, ®s->TxPrd); +#endif + wmb(); +} + + +static inline void ace_mask_irq(struct net_device *dev) +{ + struct ace_private *ap = netdev_priv(dev); + struct ace_regs __iomem *regs = ap->regs; + + if (ACE_IS_TIGON_I(ap)) + writel(1, ®s->MaskInt); + else + writel(readl(®s->HostCtrl) | MASK_INTS, ®s->HostCtrl); + + ace_sync_irq(dev->irq); +} + + +static inline void ace_unmask_irq(struct net_device *dev) +{ + struct ace_private *ap = netdev_priv(dev); + struct ace_regs __iomem *regs = ap->regs; + + if (ACE_IS_TIGON_I(ap)) + writel(0, ®s->MaskInt); + else + writel(readl(®s->HostCtrl) & ~MASK_INTS, ®s->HostCtrl); +} + + +/* + * Prototypes + */ +static int ace_init(struct net_device *dev); +static void ace_load_std_rx_ring(struct net_device *dev, int nr_bufs); +static void ace_load_mini_rx_ring(struct net_device *dev, int nr_bufs); +static void ace_load_jumbo_rx_ring(struct net_device *dev, int nr_bufs); +static irqreturn_t ace_interrupt(int irq, void *dev_id); +static int ace_load_firmware(struct net_device *dev); +static int ace_open(struct net_device *dev); +static netdev_tx_t ace_start_xmit(struct sk_buff *skb, + struct net_device *dev); +static int ace_close(struct net_device *dev); +static void ace_tasklet(unsigned long dev); +static void ace_dump_trace(struct ace_private *ap); +static void ace_set_multicast_list(struct net_device *dev); +static int ace_change_mtu(struct net_device *dev, int new_mtu); +static int ace_set_mac_addr(struct net_device *dev, void *p); +static void ace_set_rxtx_parms(struct net_device *dev, int jumbo); +static int ace_allocate_descriptors(struct net_device *dev); +static void ace_free_descriptors(struct net_device *dev); +static void ace_init_cleanup(struct net_device *dev); +static struct net_device_stats *ace_get_stats(struct net_device *dev); +static int read_eeprom_byte(struct net_device *dev, unsigned long offset); + +#endif /* _ACENIC_H_ */