/* * forcedeth: Ethernet driver for NVIDIA nForce media access controllers. * * Note: This driver is a cleanroom reimplementation based on reverse * engineered documentation written by Carl-Daniel Hailfinger * and Andrew de Quincey. * * NVIDIA, nForce and other NVIDIA marks are trademarks or registered * trademarks of NVIDIA Corporation in the United States and other * countries. * * Copyright (C) 2003,4,5 Manfred Spraul * Copyright (C) 2004 Andrew de Quincey (wol support) * Copyright (C) 2004 Carl-Daniel Hailfinger (invalid MAC handling, insane * IRQ rate fixes, bigendian fixes, cleanups, verification) * Copyright (c) 2004,5,6 NVIDIA Corporation * * 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. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Changelog: * 0.01: 05 Oct 2003: First release that compiles without warnings. * 0.02: 05 Oct 2003: Fix bug for nv_drain_tx: do not try to free NULL skbs. * Check all PCI BARs for the register window. * udelay added to mii_rw. * 0.03: 06 Oct 2003: Initialize dev->irq. * 0.04: 07 Oct 2003: Initialize np->lock, reduce handled irqs, add printks. * 0.05: 09 Oct 2003: printk removed again, irq status print tx_timeout. * 0.06: 10 Oct 2003: MAC Address read updated, pff flag generation updated, * irq mask updated * 0.07: 14 Oct 2003: Further irq mask updates. * 0.08: 20 Oct 2003: rx_desc.Length initialization added, nv_alloc_rx refill * added into irq handler, NULL check for drain_ring. * 0.09: 20 Oct 2003: Basic link speed irq implementation. Only handle the * requested interrupt sources. * 0.10: 20 Oct 2003: First cleanup for release. * 0.11: 21 Oct 2003: hexdump for tx added, rx buffer sizes increased. * MAC Address init fix, set_multicast cleanup. * 0.12: 23 Oct 2003: Cleanups for release. * 0.13: 25 Oct 2003: Limit for concurrent tx packets increased to 10. * Set link speed correctly. start rx before starting * tx (nv_start_rx sets the link speed). * 0.14: 25 Oct 2003: Nic dependant irq mask. * 0.15: 08 Nov 2003: fix smp deadlock with set_multicast_list during * open. * 0.16: 15 Nov 2003: include file cleanup for ppc64, rx buffer size * increased to 1628 bytes. * 0.17: 16 Nov 2003: undo rx buffer size increase. Substract 1 from * the tx length. * 0.18: 17 Nov 2003: fix oops due to late initialization of dev_stats * 0.19: 29 Nov 2003: Handle RxNoBuf, detect & handle invalid mac * addresses, really stop rx if already running * in nv_start_rx, clean up a bit. * 0.20: 07 Dec 2003: alloc fixes * 0.21: 12 Jan 2004: additional alloc fix, nic polling fix. * 0.22: 19 Jan 2004: reprogram timer to a sane rate, avoid lockup * on close. * 0.23: 26 Jan 2004: various small cleanups * 0.24: 27 Feb 2004: make driver even less anonymous in backtraces * 0.25: 09 Mar 2004: wol support * 0.26: 03 Jun 2004: netdriver specific annotation, sparse-related fixes * 0.27: 19 Jun 2004: Gigabit support, new descriptor rings, * added CK804/MCP04 device IDs, code fixes * for registers, link status and other minor fixes. * 0.28: 21 Jun 2004: Big cleanup, making driver mostly endian safe * 0.29: 31 Aug 2004: Add backup timer for link change notification. * 0.30: 25 Sep 2004: rx checksum support for nf 250 Gb. Add rx reset * into nv_close, otherwise reenabling for wol can * cause DMA to kfree'd memory. * 0.31: 14 Nov 2004: ethtool support for getting/setting link * capabilities. * 0.32: 16 Apr 2005: RX_ERROR4 handling added. * 0.33: 16 May 2005: Support for MCP51 added. * 0.34: 18 Jun 2005: Add DEV_NEED_LINKTIMER to all nForce nics. * 0.35: 26 Jun 2005: Support for MCP55 added. * 0.36: 28 Jun 2005: Add jumbo frame support. * 0.37: 10 Jul 2005: Additional ethtool support, cleanup of pci id list * 0.38: 16 Jul 2005: tx irq rewrite: Use global flags instead of * per-packet flags. * 0.39: 18 Jul 2005: Add 64bit descriptor support. * 0.40: 19 Jul 2005: Add support for mac address change. * 0.41: 30 Jul 2005: Write back original MAC in nv_close instead * of nv_remove * 0.42: 06 Aug 2005: Fix lack of link speed initialization * in the second (and later) nv_open call * 0.43: 10 Aug 2005: Add support for tx checksum. * 0.44: 20 Aug 2005: Add support for scatter gather and segmentation. * 0.45: 18 Sep 2005: Remove nv_stop/start_rx from every link check * 0.46: 20 Oct 2005: Add irq optimization modes. * 0.47: 26 Oct 2005: Add phyaddr 0 in phy scan. * 0.48: 24 Dec 2005: Disable TSO, bugfix for pci_map_single * 0.49: 10 Dec 2005: Fix tso for large buffers. * 0.50: 20 Jan 2006: Add 8021pq tagging support. * 0.51: 20 Jan 2006: Add 64bit consistent memory allocation for rings. * 0.52: 20 Jan 2006: Add MSI/MSIX support. * 0.53: 19 Mar 2006: Fix init from low power mode and add hw reset. * 0.54: 21 Mar 2006: Fix spin locks for multi irqs and cleanup. * 0.55: 22 Mar 2006: Add flow control (pause frame). * 0.56: 22 Mar 2006: Additional ethtool config and moduleparam support. * 0.57: 14 May 2006: Mac address set in probe/remove and order corrections. * 0.58: 30 Oct 2006: Added support for sideband management unit. * 0.59: 30 Oct 2006: Added support for recoverable error. * 0.60: 20 Jan 2007: Code optimizations for rings, rx & tx data paths, and stats. * * Known bugs: * We suspect that on some hardware no TX done interrupts are generated. * This means recovery from netif_stop_queue only happens if the hw timer * interrupt fires (100 times/second, configurable with NVREG_POLL_DEFAULT) * and the timer is active in the IRQMask, or if a rx packet arrives by chance. * If your hardware reliably generates tx done interrupts, then you can remove * DEV_NEED_TIMERIRQ from the driver_data flags. * DEV_NEED_TIMERIRQ will not harm you on sane hardware, only generating a few * superfluous timer interrupts from the nic. */ #ifdef CONFIG_FORCEDETH_NAPI #define DRIVERNAPI "-NAPI" #else #define DRIVERNAPI #endif #define FORCEDETH_VERSION "0.61" #define DRV_NAME "forcedeth" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if 0 #define dprintk printk #else #define dprintk(x...) do { } while (0) #endif #define TX_WORK_PER_LOOP 64 #define RX_WORK_PER_LOOP 64 /* * Hardware access: */ #define DEV_NEED_TIMERIRQ 0x0001 /* set the timer irq flag in the irq mask */ #define DEV_NEED_LINKTIMER 0x0002 /* poll link settings. Relies on the timer irq */ #define DEV_HAS_LARGEDESC 0x0004 /* device supports jumbo frames and needs packet format 2 */ #define DEV_HAS_HIGH_DMA 0x0008 /* device supports 64bit dma */ #define DEV_HAS_CHECKSUM 0x0010 /* device supports tx and rx checksum offloads */ #define DEV_HAS_VLAN 0x0020 /* device supports vlan tagging and striping */ #define DEV_HAS_MSI 0x0040 /* device supports MSI */ #define DEV_HAS_MSI_X 0x0080 /* device supports MSI-X */ #define DEV_HAS_POWER_CNTRL 0x0100 /* device supports power savings */ #define DEV_HAS_PAUSEFRAME_TX 0x0200 /* device supports tx pause frames */ #define DEV_HAS_STATISTICS_V1 0x0400 /* device supports hw statistics version 1 */ #define DEV_HAS_STATISTICS_V2 0x0800 /* device supports hw statistics version 2 */ #define DEV_HAS_TEST_EXTENDED 0x1000 /* device supports extended diagnostic test */ #define DEV_HAS_MGMT_UNIT 0x2000 /* device supports management unit */ #define DEV_HAS_CORRECT_MACADDR 0x4000 /* device supports correct mac address order */ enum { NvRegIrqStatus = 0x000, #define NVREG_IRQSTAT_MIIEVENT 0x040 #define NVREG_IRQSTAT_MASK 0x81ff NvRegIrqMask = 0x004, #define NVREG_IRQ_RX_ERROR 0x0001 #define NVREG_IRQ_RX 0x0002 #define NVREG_IRQ_RX_NOBUF 0x0004 #define NVREG_IRQ_TX_ERR 0x0008 #define NVREG_IRQ_TX_OK 0x0010 #define NVREG_IRQ_TIMER 0x0020 #define NVREG_IRQ_LINK 0x0040 #define NVREG_IRQ_RX_FORCED 0x0080 #define NVREG_IRQ_TX_FORCED 0x0100 #define NVREG_IRQ_RECOVER_ERROR 0x8000 #define NVREG_IRQMASK_THROUGHPUT 0x00df #define NVREG_IRQMASK_CPU 0x0060 #define NVREG_IRQ_TX_ALL (NVREG_IRQ_TX_ERR|NVREG_IRQ_TX_OK|NVREG_IRQ_TX_FORCED) #define NVREG_IRQ_RX_ALL (NVREG_IRQ_RX_ERROR|NVREG_IRQ_RX|NVREG_IRQ_RX_NOBUF|NVREG_IRQ_RX_FORCED) #define NVREG_IRQ_OTHER (NVREG_IRQ_TIMER|NVREG_IRQ_LINK|NVREG_IRQ_RECOVER_ERROR) #define NVREG_IRQ_UNKNOWN (~(NVREG_IRQ_RX_ERROR|NVREG_IRQ_RX|NVREG_IRQ_RX_NOBUF|NVREG_IRQ_TX_ERR| \ NVREG_IRQ_TX_OK|NVREG_IRQ_TIMER|NVREG_IRQ_LINK|NVREG_IRQ_RX_FORCED| \ NVREG_IRQ_TX_FORCED|NVREG_IRQ_RECOVER_ERROR)) NvRegUnknownSetupReg6 = 0x008, #define NVREG_UNKSETUP6_VAL 3 /* * NVREG_POLL_DEFAULT is the interval length of the timer source on the nic * NVREG_POLL_DEFAULT=97 would result in an interval length of 1 ms */ NvRegPollingInterval = 0x00c, #define NVREG_POLL_DEFAULT_THROUGHPUT 970 /* backup tx cleanup if loop max reached */ #define NVREG_POLL_DEFAULT_CPU 13 NvRegMSIMap0 = 0x020, NvRegMSIMap1 = 0x024, NvRegMSIIrqMask = 0x030, #define NVREG_MSI_VECTOR_0_ENABLED 0x01 NvRegMisc1 = 0x080, #define NVREG_MISC1_PAUSE_TX 0x01 #define NVREG_MISC1_HD 0x02 #define NVREG_MISC1_FORCE 0x3b0f3c NvRegMacReset = 0x3c, #define NVREG_MAC_RESET_ASSERT 0x0F3 NvRegTransmitterControl = 0x084, #define NVREG_XMITCTL_START 0x01 #define NVREG_XMITCTL_MGMT_ST 0x40000000 #define NVREG_XMITCTL_SYNC_MASK 0x000f0000 #define NVREG_XMITCTL_SYNC_NOT_READY 0x0 #define NVREG_XMITCTL_SYNC_PHY_INIT 0x00040000 #define NVREG_XMITCTL_MGMT_SEMA_MASK 0x00000f00 #define NVREG_XMITCTL_MGMT_SEMA_FREE 0x0 #define NVREG_XMITCTL_HOST_SEMA_MASK 0x0000f000 #define NVREG_XMITCTL_HOST_SEMA_ACQ 0x0000f000 #define NVREG_XMITCTL_HOST_LOADED 0x00004000 #define NVREG_XMITCTL_TX_PATH_EN 0x01000000 NvRegTransmitterStatus = 0x088, #define NVREG_XMITSTAT_BUSY 0x01 NvRegPacketFilterFlags = 0x8c, #define NVREG_PFF_PAUSE_RX 0x08 #define NVREG_PFF_ALWAYS 0x7F0000 #define NVREG_PFF_PROMISC 0x80 #define NVREG_PFF_MYADDR 0x20 #define NVREG_PFF_LOOPBACK 0x10 NvRegOffloadConfig = 0x90, #define NVREG_OFFLOAD_HOMEPHY 0x601 #define NVREG_OFFLOAD_NORMAL RX_NIC_BUFSIZE NvRegReceiverControl = 0x094, #define NVREG_RCVCTL_START 0x01 #define NVREG_RCVCTL_RX_PATH_EN 0x01000000 NvRegReceiverStatus = 0x98, #define NVREG_RCVSTAT_BUSY 0x01 NvRegRandomSeed = 0x9c, #define NVREG_RNDSEED_MASK 0x00ff #define NVREG_RNDSEED_FORCE 0x7f00 #define NVREG_RNDSEED_FORCE2 0x2d00 #define NVREG_RNDSEED_FORCE3 0x7400 NvRegTxDeferral = 0xA0, #define NVREG_TX_DEFERRAL_DEFAULT 0x15050f #define NVREG_TX_DEFERRAL_RGMII_10_100 0x16070f #define NVREG_TX_DEFERRAL_RGMII_1000 0x14050f NvRegRxDeferral = 0xA4, #define NVREG_RX_DEFERRAL_DEFAULT 0x16 NvRegMacAddrA = 0xA8, NvRegMacAddrB = 0xAC, NvRegMulticastAddrA = 0xB0, #define NVREG_MCASTADDRA_FORCE 0x01 NvRegMulticastAddrB = 0xB4, NvRegMulticastMaskA = 0xB8, NvRegMulticastMaskB = 0xBC, NvRegPhyInterface = 0xC0, #define PHY_RGMII 0x10000000 NvRegTxRingPhysAddr = 0x100, NvRegRxRingPhysAddr = 0x104, NvRegRingSizes = 0x108, #define NVREG_RINGSZ_TXSHIFT 0 #define NVREG_RINGSZ_RXSHIFT 16 NvRegTransmitPoll = 0x10c, #define NVREG_TRANSMITPOLL_MAC_ADDR_REV 0x00008000 NvRegLinkSpeed = 0x110, #define NVREG_LINKSPEED_FORCE 0x10000 #define NVREG_LINKSPEED_10 1000 #define NVREG_LINKSPEED_100 100 #define NVREG_LINKSPEED_1000 50 #define NVREG_LINKSPEED_MASK (0xFFF) NvRegUnknownSetupReg5 = 0x130, #define NVREG_UNKSETUP5_BIT31 (1<<31) NvRegTxWatermark = 0x13c, #define NVREG_TX_WM_DESC1_DEFAULT 0x0200010 #define NVREG_TX_WM_DESC2_3_DEFAULT 0x1e08000 #define NVREG_TX_WM_DESC2_3_1000 0xfe08000 NvRegTxRxControl = 0x144, #define NVREG_TXRXCTL_KICK 0x0001 #define NVREG_TXRXCTL_BIT1 0x0002 #define NVREG_TXRXCTL_BIT2 0x0004 #define NVREG_TXRXCTL_IDLE 0x0008 #define NVREG_TXRXCTL_RESET 0x0010 #define NVREG_TXRXCTL_RXCHECK 0x0400 #define NVREG_TXRXCTL_DESC_1 0 #define NVREG_TXRXCTL_DESC_2 0x002100 #define NVREG_TXRXCTL_DESC_3 0xc02200 #define NVREG_TXRXCTL_VLANSTRIP 0x00040 #define NVREG_TXRXCTL_VLANINS 0x00080 NvRegTxRingPhysAddrHigh = 0x148, NvRegRxRingPhysAddrHigh = 0x14C, NvRegTxPauseFrame = 0x170, #define NVREG_TX_PAUSEFRAME_DISABLE 0x1ff0080 #define NVREG_TX_PAUSEFRAME_ENABLE 0x0c00030 NvRegMIIStatus = 0x180, #define NVREG_MIISTAT_ERROR 0x0001 #define NVREG_MIISTAT_LINKCHANGE 0x0008 #define NVREG_MIISTAT_MASK 0x000f #define NVREG_MIISTAT_MASK2 0x000f NvRegMIIMask = 0x184, #define NVREG_MII_LINKCHANGE 0x0008 NvRegAdapterControl = 0x188, #define NVREG_ADAPTCTL_START 0x02 #define NVREG_ADAPTCTL_LINKUP 0x04 #define NVREG_ADAPTCTL_PHYVALID 0x40000 #define NVREG_ADAPTCTL_RUNNING 0x100000 #define NVREG_ADAPTCTL_PHYSHIFT 24 NvRegMIISpeed = 0x18c, #define NVREG_MIISPEED_BIT8 (1<<8) #define NVREG_MIIDELAY 5 NvRegMIIControl = 0x190, #define NVREG_MIICTL_INUSE 0x08000 #define NVREG_MIICTL_WRITE 0x00400 #define NVREG_MIICTL_ADDRSHIFT 5 NvRegMIIData = 0x194, NvRegWakeUpFlags = 0x200, #define NVREG_WAKEUPFLAGS_VAL 0x7770 #define NVREG_WAKEUPFLAGS_BUSYSHIFT 24 #define NVREG_WAKEUPFLAGS_ENABLESHIFT 16 #define NVREG_WAKEUPFLAGS_D3SHIFT 12 #define NVREG_WAKEUPFLAGS_D2SHIFT 8 #define NVREG_WAKEUPFLAGS_D1SHIFT 4 #define NVREG_WAKEUPFLAGS_D0SHIFT 0 #define NVREG_WAKEUPFLAGS_ACCEPT_MAGPAT 0x01 #define NVREG_WAKEUPFLAGS_ACCEPT_WAKEUPPAT 0x02 #define NVREG_WAKEUPFLAGS_ACCEPT_LINKCHANGE 0x04 #define NVREG_WAKEUPFLAGS_ENABLE 0x1111 NvRegPatternCRC = 0x204, NvRegPatternMask = 0x208, NvRegPowerCap = 0x268, #define NVREG_POWERCAP_D3SUPP (1<<30) #define NVREG_POWERCAP_D2SUPP (1<<26) #define NVREG_POWERCAP_D1SUPP (1<<25) NvRegPowerState = 0x26c, #define NVREG_POWERSTATE_POWEREDUP 0x8000 #define NVREG_POWERSTATE_VALID 0x0100 #define NVREG_POWERSTATE_MASK 0x0003 #define NVREG_POWERSTATE_D0 0x0000 #define NVREG_POWERSTATE_D1 0x0001 #define NVREG_POWERSTATE_D2 0x0002 #define NVREG_POWERSTATE_D3 0x0003 NvRegTxCnt = 0x280, NvRegTxZeroReXmt = 0x284, NvRegTxOneReXmt = 0x288, NvRegTxManyReXmt = 0x28c, NvRegTxLateCol = 0x290, NvRegTxUnderflow = 0x294, NvRegTxLossCarrier = 0x298, NvRegTxExcessDef = 0x29c, NvRegTxRetryErr = 0x2a0, NvRegRxFrameErr = 0x2a4, NvRegRxExtraByte = 0x2a8, NvRegRxLateCol = 0x2ac, NvRegRxRunt = 0x2b0, NvRegRxFrameTooLong = 0x2b4, NvRegRxOverflow = 0x2b8, NvRegRxFCSErr = 0x2bc, NvRegRxFrameAlignErr = 0x2c0, NvRegRxLenErr = 0x2c4, NvRegRxUnicast = 0x2c8, NvRegRxMulticast = 0x2cc, NvRegRxBroadcast = 0x2d0, NvRegTxDef = 0x2d4, NvRegTxFrame = 0x2d8, NvRegRxCnt = 0x2dc, NvRegTxPause = 0x2e0, NvRegRxPause = 0x2e4, NvRegRxDropFrame = 0x2e8, NvRegVlanControl = 0x300, #define NVREG_VLANCONTROL_ENABLE 0x2000 NvRegMSIXMap0 = 0x3e0, NvRegMSIXMap1 = 0x3e4, NvRegMSIXIrqStatus = 0x3f0, NvRegPowerState2 = 0x600, #define NVREG_POWERSTATE2_POWERUP_MASK 0x0F11 #define NVREG_POWERSTATE2_POWERUP_REV_A3 0x0001 }; /* Big endian: should work, but is untested */ struct ring_desc { __le32 buf; __le32 flaglen; }; struct ring_desc_ex { __le32 bufhigh; __le32 buflow; __le32 txvlan; __le32 flaglen; }; union ring_type { struct ring_desc* orig; struct ring_desc_ex* ex; }; #define FLAG_MASK_V1 0xffff0000 #define FLAG_MASK_V2 0xffffc000 #define LEN_MASK_V1 (0xffffffff ^ FLAG_MASK_V1) #define LEN_MASK_V2 (0xffffffff ^ FLAG_MASK_V2) #define NV_TX_LASTPACKET (1<<16) #define NV_TX_RETRYERROR (1<<19) #define NV_TX_FORCED_INTERRUPT (1<<24) #define NV_TX_DEFERRED (1<<26) #define NV_TX_CARRIERLOST (1<<27) #define NV_TX_LATECOLLISION (1<<28) #define NV_TX_UNDERFLOW (1<<29) #define NV_TX_ERROR (1<<30) #define NV_TX_VALID (1<<31) #define NV_TX2_LASTPACKET (1<<29) #define NV_TX2_RETRYERROR (1<<18) #define NV_TX2_FORCED_INTERRUPT (1<<30) #define NV_TX2_DEFERRED (1<<25) #define NV_TX2_CARRIERLOST (1<<26) #define NV_TX2_LATECOLLISION (1<<27) #define NV_TX2_UNDERFLOW (1<<28) /* error and valid are the same for both */ #define NV_TX2_ERROR (1<<30) #define NV_TX2_VALID (1<<31) #define NV_TX2_TSO (1<<28) #define NV_TX2_TSO_SHIFT 14 #define NV_TX2_TSO_MAX_SHIFT 14 #define NV_TX2_TSO_MAX_SIZE (1<priv->lock, except the performance * critical parts: * - rx is (pseudo-) lockless: it relies on the single-threading provided * by the arch code for interrupts. * - tx setup is lockless: it relies on netif_tx_lock. Actual submission * needs dev->priv->lock :-( * - set_multicast_list: preparation lockless, relies on netif_tx_lock. */ /* in dev: base, irq */ struct fe_priv { spinlock_t lock; struct net_device *dev; struct napi_struct napi; /* General data: * Locking: spin_lock(&np->lock); */ struct nv_ethtool_stats estats; int in_shutdown; u32 linkspeed; int duplex; int autoneg; int fixed_mode; int phyaddr; int wolenabled; unsigned int phy_oui; unsigned int phy_model; u16 gigabit; int intr_test; int recover_error; /* General data: RO fields */ dma_addr_t ring_addr; struct pci_dev *pci_dev; u32 orig_mac[2]; u32 irqmask; u32 desc_ver; u32 txrxctl_bits; u32 vlanctl_bits; u32 driver_data; u32 register_size; int rx_csum; u32 mac_in_use; void __iomem *base; /* rx specific fields. * Locking: Within irq hander or disable_irq+spin_lock(&np->lock); */ union ring_type get_rx, put_rx, first_rx, last_rx; struct nv_skb_map *get_rx_ctx, *put_rx_ctx; struct nv_skb_map *first_rx_ctx, *last_rx_ctx; struct nv_skb_map *rx_skb; union ring_type rx_ring; unsigned int rx_buf_sz; unsigned int pkt_limit; struct timer_list oom_kick; struct timer_list nic_poll; struct timer_list stats_poll; u32 nic_poll_irq; int rx_ring_size; /* media detection workaround. * Locking: Within irq hander or disable_irq+spin_lock(&np->lock); */ int need_linktimer; unsigned long link_timeout; /* * tx specific fields. */ union ring_type get_tx, put_tx, first_tx, last_tx; struct nv_skb_map *get_tx_ctx, *put_tx_ctx; struct nv_skb_map *first_tx_ctx, *last_tx_ctx; struct nv_skb_map *tx_skb; union ring_type tx_ring; u32 tx_flags; int tx_ring_size; int tx_stop; /* vlan fields */ struct vlan_group *vlangrp; /* msi/msi-x fields */ u32 msi_flags; struct msix_entry msi_x_entry[NV_MSI_X_MAX_VECTORS]; /* flow control */ u32 pause_flags; }; /* * Maximum number of loops until we assume that a bit in the irq mask * is stuck. Overridable with module param. */ static int max_interrupt_work = 5; /* * Optimization can be either throuput mode or cpu mode * * Throughput Mode: Every tx and rx packet will generate an interrupt. * CPU Mode: Interrupts are controlled by a timer. */ enum { NV_OPTIMIZATION_MODE_THROUGHPUT, NV_OPTIMIZATION_MODE_CPU }; static int optimization_mode = NV_OPTIMIZATION_MODE_THROUGHPUT; /* * Poll interval for timer irq * * This interval determines how frequent an interrupt is generated. * The is value is determined by [(time_in_micro_secs * 100) / (2^10)] * Min = 0, and Max = 65535 */ static int poll_interval = -1; /* * MSI interrupts */ enum { NV_MSI_INT_DISABLED, NV_MSI_INT_ENABLED }; static int msi = NV_MSI_INT_ENABLED; /* * MSIX interrupts */ enum { NV_MSIX_INT_DISABLED, NV_MSIX_INT_ENABLED }; static int msix = NV_MSIX_INT_DISABLED; /* * DMA 64bit */ enum { NV_DMA_64BIT_DISABLED, NV_DMA_64BIT_ENABLED }; static int dma_64bit = NV_DMA_64BIT_ENABLED; static inline struct fe_priv *get_nvpriv(struct net_device *dev) { return netdev_priv(dev); } static inline u8 __iomem *get_hwbase(struct net_device *dev) { return ((struct fe_priv *)netdev_priv(dev))->base; } static inline void pci_push(u8 __iomem *base) { /* force out pending posted writes */ readl(base); } static inline u32 nv_descr_getlength(struct ring_desc *prd, u32 v) { return le32_to_cpu(prd->flaglen) & ((v == DESC_VER_1) ? LEN_MASK_V1 : LEN_MASK_V2); } static inline u32 nv_descr_getlength_ex(struct ring_desc_ex *prd, u32 v) { return le32_to_cpu(prd->flaglen) & LEN_MASK_V2; } static int reg_delay(struct net_device *dev, int offset, u32 mask, u32 target, int delay, int delaymax, const char *msg) { u8 __iomem *base = get_hwbase(dev); pci_push(base); do { udelay(delay); delaymax -= delay; if (delaymax < 0) { if (msg) printk(msg); return 1; } } while ((readl(base + offset) & mask) != target); return 0; } #define NV_SETUP_RX_RING 0x01 #define NV_SETUP_TX_RING 0x02 static void setup_hw_rings(struct net_device *dev, int rxtx_flags) { struct fe_priv *np = get_nvpriv(dev); u8 __iomem *base = get_hwbase(dev); if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) { if (rxtx_flags & NV_SETUP_RX_RING) { writel((u32) cpu_to_le64(np->ring_addr), base + NvRegRxRingPhysAddr); } if (rxtx_flags & NV_SETUP_TX_RING) { writel((u32) cpu_to_le64(np->ring_addr + np->rx_ring_size*sizeof(struct ring_desc)), base + NvRegTxRingPhysAddr); } } else { if (rxtx_flags & NV_SETUP_RX_RING) { writel((u32) cpu_to_le64(np->ring_addr), base + NvRegRxRingPhysAddr); writel((u32) (cpu_to_le64(np->ring_addr) >> 32), base + NvRegRxRingPhysAddrHigh); } if (rxtx_flags & NV_SETUP_TX_RING) { writel((u32) cpu_to_le64(np->ring_addr + np->rx_ring_size*sizeof(struct ring_desc_ex)), base + NvRegTxRingPhysAddr); writel((u32) (cpu_to_le64(np->ring_addr + np->rx_ring_size*sizeof(struct ring_desc_ex)) >> 32), base + NvRegTxRingPhysAddrHigh); } } } static void free_rings(struct net_device *dev) { struct fe_priv *np = get_nvpriv(dev); if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) { if (np->rx_ring.orig) pci_free_consistent(np->pci_dev, sizeof(struct ring_desc) * (np->rx_ring_size + np->tx_ring_size), np->rx_ring.orig, np->ring_addr); } else { if (np->rx_ring.ex) pci_free_consistent(np->pci_dev, sizeof(struct ring_desc_ex) * (np->rx_ring_size + np->tx_ring_size), np->rx_ring.ex, np->ring_addr); } if (np->rx_skb) kfree(np->rx_skb); if (np->tx_skb) kfree(np->tx_skb); } static int using_multi_irqs(struct net_device *dev) { struct fe_priv *np = get_nvpriv(dev); if (!(np->msi_flags & NV_MSI_X_ENABLED) || ((np->msi_flags & NV_MSI_X_ENABLED) && ((np->msi_flags & NV_MSI_X_VECTORS_MASK) == 0x1))) return 0; else return 1; } static void nv_enable_irq(struct net_device *dev) { struct fe_priv *np = get_nvpriv(dev); if (!using_multi_irqs(dev)) { if (np->msi_flags & NV_MSI_X_ENABLED) enable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_ALL].vector); else enable_irq(np->pci_dev->irq); } else { enable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_RX].vector); enable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_TX].vector); enable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_OTHER].vector); } } static void nv_disable_irq(struct net_device *dev) { struct fe_priv *np = get_nvpriv(dev); if (!using_multi_irqs(dev)) { if (np->msi_flags & NV_MSI_X_ENABLED) disable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_ALL].vector); else disable_irq(np->pci_dev->irq); } else { disable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_RX].vector); disable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_TX].vector); disable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_OTHER].vector); } } /* In MSIX mode, a write to irqmask behaves as XOR */ static void nv_enable_hw_interrupts(struct net_device *dev, u32 mask) { u8 __iomem *base = get_hwbase(dev); writel(mask, base + NvRegIrqMask); } static void nv_disable_hw_interrupts(struct net_device *dev, u32 mask) { struct fe_priv *np = get_nvpriv(dev); u8 __iomem *base = get_hwbase(dev); if (np->msi_flags & NV_MSI_X_ENABLED) { writel(mask, base + NvRegIrqMask); } else { if (np->msi_flags & NV_MSI_ENABLED) writel(0, base + NvRegMSIIrqMask); writel(0, base + NvRegIrqMask); } } #define MII_READ (-1) /* mii_rw: read/write a register on the PHY. * * Caller must guarantee serialization */ static int mii_rw(struct net_device *dev, int addr, int miireg, int value) { u8 __iomem *base = get_hwbase(dev); u32 reg; int retval; writel(NVREG_MIISTAT_MASK, base + NvRegMIIStatus); reg = readl(base + NvRegMIIControl); if (reg & NVREG_MIICTL_INUSE) { writel(NVREG_MIICTL_INUSE, base + NvRegMIIControl); udelay(NV_MIIBUSY_DELAY); } reg = (addr << NVREG_MIICTL_ADDRSHIFT) | miireg; if (value != MII_READ) { writel(value, base + NvRegMIIData); reg |= NVREG_MIICTL_WRITE; } writel(reg, base + NvRegMIIControl); if (reg_delay(dev, NvRegMIIControl, NVREG_MIICTL_INUSE, 0, NV_MIIPHY_DELAY, NV_MIIPHY_DELAYMAX, NULL)) { dprintk(KERN_DEBUG "%s: mii_rw of reg %d at PHY %d timed out.\n", dev->name, miireg, addr); retval = -1; } else if (value != MII_READ) { /* it was a write operation - fewer failures are detectable */ dprintk(KERN_DEBUG "%s: mii_rw wrote 0x%x to reg %d at PHY %d\n", dev->name, value, miireg, addr); retval = 0; } else if (readl(base + NvRegMIIStatus) & NVREG_MIISTAT_ERROR) { dprintk(KERN_DEBUG "%s: mii_rw of reg %d at PHY %d failed.\n", dev->name, miireg, addr); retval = -1; } else { retval = readl(base + NvRegMIIData); dprintk(KERN_DEBUG "%s: mii_rw read from reg %d at PHY %d: 0x%x.\n", dev->name, miireg, addr, retval); } return retval; } static int phy_reset(struct net_device *dev, u32 bmcr_setup) { struct fe_priv *np = netdev_priv(dev); u32 miicontrol; unsigned int tries = 0; miicontrol = BMCR_RESET | bmcr_setup; if (mii_rw(dev, np->phyaddr, MII_BMCR, miicontrol)) { return -1; } /* wait for 500ms */ msleep(500); /* must wait till reset is deasserted */ while (miicontrol & BMCR_RESET) { msleep(10); miicontrol = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ); /* FIXME: 100 tries seem excessive */ if (tries++ > 100) return -1; } return 0; } static int phy_init(struct net_device *dev) { struct fe_priv *np = get_nvpriv(dev); u8 __iomem *base = get_hwbase(dev); u32 phyinterface, phy_reserved, mii_status, mii_control, mii_control_1000,reg; /* phy errata for E3016 phy */ if (np->phy_model == PHY_MODEL_MARVELL_E3016) { reg = mii_rw(dev, np->phyaddr, MII_NCONFIG, MII_READ); reg &= ~PHY_MARVELL_E3016_INITMASK; if (mii_rw(dev, np->phyaddr, MII_NCONFIG, reg)) { printk(KERN_INFO "%s: phy write to errata reg failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } } if (np->phy_oui == PHY_OUI_REALTEK) { if (mii_rw(dev, np->phyaddr, PHY_REALTEK_INIT_REG1, PHY_REALTEK_INIT1)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } if (mii_rw(dev, np->phyaddr, PHY_REALTEK_INIT_REG2, PHY_REALTEK_INIT2)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } if (mii_rw(dev, np->phyaddr, PHY_REALTEK_INIT_REG1, PHY_REALTEK_INIT3)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } if (mii_rw(dev, np->phyaddr, PHY_REALTEK_INIT_REG3, PHY_REALTEK_INIT4)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } if (mii_rw(dev, np->phyaddr, PHY_REALTEK_INIT_REG1, PHY_REALTEK_INIT1)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } } /* set advertise register */ reg = mii_rw(dev, np->phyaddr, MII_ADVERTISE, MII_READ); reg |= (ADVERTISE_10HALF|ADVERTISE_10FULL|ADVERTISE_100HALF|ADVERTISE_100FULL|ADVERTISE_PAUSE_ASYM|ADVERTISE_PAUSE_CAP); if (mii_rw(dev, np->phyaddr, MII_ADVERTISE, reg)) { printk(KERN_INFO "%s: phy write to advertise failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } /* get phy interface type */ phyinterface = readl(base + NvRegPhyInterface); /* see if gigabit phy */ mii_status = mii_rw(dev, np->phyaddr, MII_BMSR, MII_READ); if (mii_status & PHY_GIGABIT) { np->gigabit = PHY_GIGABIT; mii_control_1000 = mii_rw(dev, np->phyaddr, MII_CTRL1000, MII_READ); mii_control_1000 &= ~ADVERTISE_1000HALF; if (phyinterface & PHY_RGMII) mii_control_1000 |= ADVERTISE_1000FULL; else mii_control_1000 &= ~ADVERTISE_1000FULL; if (mii_rw(dev, np->phyaddr, MII_CTRL1000, mii_control_1000)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } } else np->gigabit = 0; mii_control = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ); mii_control |= BMCR_ANENABLE; /* reset the phy * (certain phys need bmcr to be setup with reset) */ if (phy_reset(dev, mii_control)) { printk(KERN_INFO "%s: phy reset failed\n", pci_name(np->pci_dev)); return PHY_ERROR; } /* phy vendor specific configuration */ if ((np->phy_oui == PHY_OUI_CICADA) && (phyinterface & PHY_RGMII) ) { phy_reserved = mii_rw(dev, np->phyaddr, MII_RESV1, MII_READ); phy_reserved &= ~(PHY_CICADA_INIT1 | PHY_CICADA_INIT2); phy_reserved |= (PHY_CICADA_INIT3 | PHY_CICADA_INIT4); if (mii_rw(dev, np->phyaddr, MII_RESV1, phy_reserved)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } phy_reserved = mii_rw(dev, np->phyaddr, MII_NCONFIG, MII_READ); phy_reserved |= PHY_CICADA_INIT5; if (mii_rw(dev, np->phyaddr, MII_NCONFIG, phy_reserved)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } } if (np->phy_oui == PHY_OUI_CICADA) { phy_reserved = mii_rw(dev, np->phyaddr, MII_SREVISION, MII_READ); phy_reserved |= PHY_CICADA_INIT6; if (mii_rw(dev, np->phyaddr, MII_SREVISION, phy_reserved)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } } if (np->phy_oui == PHY_OUI_VITESSE) { if (mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG1, PHY_VITESSE_INIT1)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } if (mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG2, PHY_VITESSE_INIT2)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } phy_reserved = mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG4, MII_READ); if (mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG4, phy_reserved)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } phy_reserved = mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG3, MII_READ); phy_reserved &= ~PHY_VITESSE_INIT_MSK1; phy_reserved |= PHY_VITESSE_INIT3; if (mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG3, phy_reserved)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } if (mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG2, PHY_VITESSE_INIT4)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } if (mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG2, PHY_VITESSE_INIT5)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } phy_reserved = mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG4, MII_READ); phy_reserved &= ~PHY_VITESSE_INIT_MSK1; phy_reserved |= PHY_VITESSE_INIT3; if (mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG4, phy_reserved)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } phy_reserved = mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG3, MII_READ); if (mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG3, phy_reserved)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } if (mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG2, PHY_VITESSE_INIT6)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } if (mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG2, PHY_VITESSE_INIT7)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } phy_reserved = mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG4, MII_READ); if (mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG4, phy_reserved)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } phy_reserved = mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG3, MII_READ); phy_reserved &= ~PHY_VITESSE_INIT_MSK2; phy_reserved |= PHY_VITESSE_INIT8; if (mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG3, phy_reserved)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } if (mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG2, PHY_VITESSE_INIT9)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } if (mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG1, PHY_VITESSE_INIT10)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } } if (np->phy_oui == PHY_OUI_REALTEK) { /* reset could have cleared these out, set them back */ if (mii_rw(dev, np->phyaddr, PHY_REALTEK_INIT_REG1, PHY_REALTEK_INIT1)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } if (mii_rw(dev, np->phyaddr, PHY_REALTEK_INIT_REG2, PHY_REALTEK_INIT2)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } if (mii_rw(dev, np->phyaddr, PHY_REALTEK_INIT_REG1, PHY_REALTEK_INIT3)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } if (mii_rw(dev, np->phyaddr, PHY_REALTEK_INIT_REG3, PHY_REALTEK_INIT4)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } if (mii_rw(dev, np->phyaddr, PHY_REALTEK_INIT_REG1, PHY_REALTEK_INIT1)) { printk(KERN_INFO "%s: phy init failed.\n", pci_name(np->pci_dev)); return PHY_ERROR; } } /* some phys clear out pause advertisment on reset, set it back */ mii_rw(dev, np->phyaddr, MII_ADVERTISE, reg); /* restart auto negotiation */ mii_control = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ); mii_control |= (BMCR_ANRESTART | BMCR_ANENABLE); if (mii_rw(dev, np->phyaddr, MII_BMCR, mii_control)) { return PHY_ERROR; } return 0; } static void nv_start_rx(struct net_device *dev) { struct fe_priv *np = netdev_priv(dev); u8 __iomem *base = get_hwbase(dev); u32 rx_ctrl = readl(base + NvRegReceiverControl); dprintk(KERN_DEBUG "%s: nv_start_rx\n", dev->name); /* Already running? Stop it. */ if ((readl(base + NvRegReceiverControl) & NVREG_RCVCTL_START) && !np->mac_in_use) { rx_ctrl &= ~NVREG_RCVCTL_START; writel(rx_ctrl, base + NvRegReceiverControl); pci_push(base); } writel(np->linkspeed, base + NvRegLinkSpeed); pci_push(base); rx_ctrl |= NVREG_RCVCTL_START; if (np->mac_in_use) rx_ctrl &= ~NVREG_RCVCTL_RX_PATH_EN; writel(rx_ctrl, base + NvRegReceiverControl); dprintk(KERN_DEBUG "%s: nv_start_rx to duplex %d, speed 0x%08x.\n", dev->name, np->duplex, np->linkspeed); pci_push(base); } static void nv_stop_rx(struct net_device *dev) { struct fe_priv *np = netdev_priv(dev); u8 __iomem *base = get_hwbase(dev); u32 rx_ctrl = readl(base + NvRegReceiverControl); dprintk(KERN_DEBUG "%s: nv_stop_rx\n", dev->name); if (!np->mac_in_use) rx_ctrl &= ~NVREG_RCVCTL_START; else rx_ctrl |= NVREG_RCVCTL_RX_PATH_EN; writel(rx_ctrl, base + NvRegReceiverControl); reg_delay(dev, NvRegReceiverStatus, NVREG_RCVSTAT_BUSY, 0, NV_RXSTOP_DELAY1, NV_RXSTOP_DELAY1MAX, KERN_INFO "nv_stop_rx: ReceiverStatus remained busy"); udelay(NV_RXSTOP_DELAY2); if (!np->mac_in_use) writel(0, base + NvRegLinkSpeed); } static void nv_start_tx(struct net_device *dev) { struct fe_priv *np = netdev_priv(dev); u8 __iomem *base = get_hwbase(dev); u32 tx_ctrl = readl(base + NvRegTransmitterControl); dprintk(KERN_DEBUG "%s: nv_start_tx\n", dev->name); tx_ctrl |= NVREG_XMITCTL_START; if (np->mac_in_use) tx_ctrl &= ~NVREG_XMITCTL_TX_PATH_EN; writel(tx_ctrl, base + NvRegTransmitterControl); pci_push(base); } static void nv_stop_tx(struct net_device *dev) { struct fe_priv *np = netdev_priv(dev); u8 __iomem *base = get_hwbase(dev); u32 tx_ctrl = readl(base + NvRegTransmitterControl); dprintk(KERN_DEBUG "%s: nv_stop_tx\n", dev->name); if (!np->mac_in_use) tx_ctrl &= ~NVREG_XMITCTL_START; else tx_ctrl |= NVREG_XMITCTL_TX_PATH_EN; writel(tx_ctrl, base + NvRegTransmitterControl); reg_delay(dev, NvRegTransmitterStatus, NVREG_XMITSTAT_BUSY, 0, NV_TXSTOP_DELAY1, NV_TXSTOP_DELAY1MAX, KERN_INFO "nv_stop_tx: TransmitterStatus remained busy"); udelay(NV_TXSTOP_DELAY2); if (!np->mac_in_use) writel(readl(base + NvRegTransmitPoll) & NVREG_TRANSMITPOLL_MAC_ADDR_REV, base + NvRegTransmitPoll); } static void nv_txrx_reset(struct net_device *dev) { struct fe_priv *np = netdev_priv(dev); u8 __iomem *base = get_hwbase(dev); dprintk(KERN_DEBUG "%s: nv_txrx_reset\n", dev->name); writel(NVREG_TXRXCTL_BIT2 | NVREG_TXRXCTL_RESET | np->txrxctl_bits, base + NvRegTxRxControl); pci_push(base); udelay(NV_TXRX_RESET_DELAY); writel(NVREG_TXRXCTL_BIT2 | np->txrxctl_bits, base + NvRegTxRxControl); pci_push(base); } static void nv_mac_reset(struct net_device *dev) { struct fe_priv *np = netdev_priv(dev); u8 __iomem *base = get_hwbase(dev); dprintk(KERN_DEBUG "%s: nv_mac_reset\n", dev->name); writel(NVREG_TXRXCTL_BIT2 | NVREG_TXRXCTL_RESET | np->txrxctl_bits, base + NvRegTxRxControl); pci_push(base); writel(NVREG_MAC_RESET_ASSERT, base + NvRegMacReset); pci_push(base); udelay(NV_MAC_RESET_DELAY); writel(0, base + NvRegMacReset); pci_push(base); udelay(NV_MAC_RESET_DELAY); writel(NVREG_TXRXCTL_BIT2 | np->txrxctl_bits, base + NvRegTxRxControl); pci_push(base); } static void nv_get_hw_stats(struct net_device *dev) { struct fe_priv *np = netdev_priv(dev); u8 __iomem *base = get_hwbase(dev); np->estats.tx_bytes += readl(base + NvRegTxCnt); np->estats.tx_zero_rexmt += readl(base + NvRegTxZeroReXmt); np->estats.tx_one_rexmt += readl(base + NvRegTxOneReXmt); np->estats.tx_many_rexmt += readl(base + NvRegTxManyReXmt); np->estats.tx_late_collision += readl(base + NvRegTxLateCol); np->estats.tx_fifo_errors += readl(base + NvRegTxUnderflow); np->estats.tx_carrier_errors += readl(base + NvRegTxLossCarrier); np->estats.tx_excess_deferral += readl(base + NvRegTxExcessDef); np->estats.tx_retry_error += readl(base + NvRegTxRetryErr); np->estats.rx_frame_error += readl(base + NvRegRxFrameErr); np->estats.rx_extra_byte += readl(base + NvRegRxExtraByte); np->estats.rx_late_collision += readl(base + NvRegRxLateCol); np->estats.rx_runt += readl(base + NvRegRxRunt); np->estats.rx_frame_too_long += readl(base + NvRegRxFrameTooLong); np->estats.rx_over_errors += readl(base + NvRegRxOverflow); np->estats.rx_crc_errors += readl(base + NvRegRxFCSErr); np->estats.rx_frame_align_error += readl(base + NvRegRxFrameAlignErr); np->estats.rx_length_error += readl(base + NvRegRxLenErr); np->estats.rx_unicast += readl(base + NvRegRxUnicast); np->estats.rx_multicast += readl(base + NvRegRxMulticast); np->estats.rx_broadcast += readl(base + NvRegRxBroadcast); np->estats.rx_packets = np->estats.rx_unicast + np->estats.rx_multicast + np->estats.rx_broadcast; np->estats.rx_errors_total = np->estats.rx_crc_errors + np->estats.rx_over_errors + np->estats.rx_frame_error + (np->estats.rx_frame_align_error - np->estats.rx_extra_byte) + np->estats.rx_late_collision + np->estats.rx_runt + np->estats.rx_frame_too_long; np->estats.tx_errors_total = np->estats.tx_late_collision + np->estats.tx_fifo_errors + np->estats.tx_carrier_errors + np->estats.tx_excess_deferral + np->estats.tx_retry_error; if (np->driver_data & DEV_HAS_STATISTICS_V2) { np->estats.tx_deferral += readl(base + NvRegTxDef); np->estats.tx_packets += readl(base + NvRegTxFrame); np->estats.rx_bytes += readl(base + NvRegRxCnt); np->estats.tx_pause += readl(base + NvRegTxPause); np->estats.rx_pause += readl(base + NvRegRxPause); np->estats.rx_drop_frame += readl(base + NvRegRxDropFrame); } } /* * nv_get_stats: dev->get_stats function * Get latest stats value from the nic. * Called with read_lock(&dev_base_lock) held for read - * only synchronized against unregister_netdevice. */ static struct net_device_stats *nv_get_stats(struct net_device *dev) { struct fe_priv *np = netdev_priv(dev); /* If the nic supports hw counters then retrieve latest values */ if (np->driver_data & (DEV_HAS_STATISTICS_V1|DEV_HAS_STATISTICS_V2)) { nv_get_hw_stats(dev); /* copy to net_device stats */ dev->stats.tx_bytes = np->estats.tx_bytes; dev->stats.tx_fifo_errors = np->estats.tx_fifo_errors; dev->stats.tx_carrier_errors = np->estats.tx_carrier_errors; dev->stats.rx_crc_errors = np->estats.rx_crc_errors; dev->stats.rx_over_errors = np->estats.rx_over_errors; dev->stats.rx_errors = np->estats.rx_errors_total; dev->stats.tx_errors = np->estats.tx_errors_total; } return &dev->stats; } /* * nv_alloc_rx: fill rx ring entries. * Return 1 if the allocations for the skbs failed and the * rx engine is without Available descriptors */ static int nv_alloc_rx(struct net_device *dev) { struct fe_priv *np = netdev_priv(dev); struct ring_desc* less_rx; less_rx = np->get_rx.orig; if (less_rx-- == np->first_rx.orig) less_rx = np->last_rx.orig; while (np->put_rx.orig != less_rx) { struct sk_buff *skb = dev_alloc_skb(np->rx_buf_sz + NV_RX_ALLOC_PAD); if (skb) { np->put_rx_ctx->skb = skb; np->put_rx_ctx->dma = pci_map_single(np->pci_dev, skb->data, skb_tailroom(skb), PCI_DMA_FROMDEVICE); np->put_rx_ctx->dma_len = skb_tailroom(skb); np->put_rx.orig->buf = cpu_to_le32(np->put_rx_ctx->dma); wmb(); np->put_rx.orig->flaglen = cpu_to_le32(np->rx_buf_sz | NV_RX_AVAIL); if (unlikely(np->put_rx.orig++ == np->last_rx.orig)) np->put_rx.orig = np->first_rx.orig; if (unlikely(np->put_rx_ctx++ == np->last_rx_ctx)) np->put_rx_ctx = np->first_rx_ctx; } else { return 1; } } return 0; } static int nv_alloc_rx_optimized(struct net_device *dev) { struct fe_priv *np = netdev_priv(dev); struct ring_desc_ex* less_rx; less_rx = np->get_rx.ex; if (less_rx-- == np->first_rx.ex) less_rx = np->last_rx.ex; while (np->put_rx.ex != less_rx) { struct sk_buff *skb = dev_alloc_skb(np->rx_buf_sz + NV_RX_ALLOC_PAD); if (skb) { np->put_rx_ctx->skb = skb; np->put_rx_ctx->dma = pci_map_single(np->pci_dev, skb->data, skb_tailroom(skb), PCI_DMA_FROMDEVICE); np->put_rx_ctx->dma_len = skb_tailroom(skb); np->put_rx.ex->bufhigh = cpu_to_le64(np->put_rx_ctx->dma) >> 32; np->put_rx.ex->buflow = cpu_to_le64(np->put_rx_ctx->dma) & 0x0FFFFFFFF; wmb(); np->put_rx.ex->flaglen = cpu_to_le32(np->rx_buf_sz | NV_RX2_AVAIL); if (unlikely(np->put_rx.ex++ == np->last_rx.ex)) np->put_rx.ex = np->first_rx.ex; if (unlikely(np->put_rx_ctx++ == np->last_rx_ctx)) np->put_rx_ctx = np->first_rx_ctx; } else { return 1; } } return 0; } /* If rx bufs are exhausted called after 50ms to attempt to refresh */ #ifdef CONFIG_FORCEDETH_NAPI static void nv_do_rx_refill(unsigned long data) { struct net_device *dev = (struct net_device *) data; struct fe_priv *np = netdev_priv(dev); /* Just reschedule NAPI rx processing */ netif_rx_schedule(dev, &np->napi); } #else static void nv_do_rx_refill(unsigned long data) { struct net_device *dev = (struct net_device *) data; struct fe_priv *np = netdev_priv(dev); int retcode; if (!using_multi_irqs(dev)) { if (np->msi_flags & NV_MSI_X_ENABLED) disable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_ALL].vector); else disable_irq(np->pci_dev->irq); } else { disable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_RX].vector); } if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) retcode = nv_alloc_rx(dev); else retcode = nv_alloc_rx_optimized(dev); if (retcode) { spin_lock_irq(&np->lock); if (!np->in_shutdown) mod_timer(&np->oom_kick, jiffies + OOM_REFILL); spin_unlock_irq(&np->lock); } if (!using_multi_irqs(dev)) { if (np->msi_flags & NV_MSI_X_ENABLED) enable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_ALL].vector); else enable_irq(np->pci_dev->irq); } else { enable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_RX].vector); } } #endif static void nv_init_rx(struct net_device *dev) { struct fe_priv *np = netdev_priv(dev); int i; np->get_rx = np->put_rx = np->first_rx = np->rx_ring; if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) np->last_rx.orig = &np->rx_ring.orig[np->rx_ring_size-1]; else np->last_rx.ex = &np->rx_ring.ex[np->rx_ring_size-1]; np->get_rx_ctx = np->put_rx_ctx = np->first_rx_ctx = np->rx_skb; np->last_rx_ctx = &np->rx_skb[np->rx_ring_size-1]; for (i = 0; i < np->rx_ring_size; i++) { if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) { np->rx_ring.orig[i].flaglen = 0; np->rx_ring.orig[i].buf = 0; } else { np->rx_ring.ex[i].flaglen = 0; np->rx_ring.ex[i].txvlan = 0; np->rx_ring.ex[i].bufhigh = 0; np->rx_ring.ex[i].buflow = 0; } np->rx_skb[i].skb = NULL; np->rx_skb[i].dma = 0; } } static void nv_init_tx(struct net_device *dev) { struct fe_priv *np = netdev_priv(dev); int i; np->get_tx = np->put_tx = np->first_tx = np->tx_ring; if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) np->last_tx.orig = &np->tx_ring.orig[np->tx_ring_size-1]; else np->last_tx.ex = &np->tx_ring.ex[np->tx_ring_size-1]; np->get_tx_ctx = np->put_tx_ctx = np->first_tx_ctx = np->tx_skb; np->last_tx_ctx = &np->tx_skb[np->tx_ring_size-1]; for (i = 0; i < np->tx_ring_size; i++) { if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) { np->tx_ring.orig[i].flaglen = 0; np->tx_ring.orig[i].buf = 0; } else { np->tx_ring.ex[i].flaglen = 0; np->tx_ring.ex[i].txvlan = 0; np->tx_ring.ex[i].bufhigh = 0; np->tx_ring.ex[i].buflow = 0; } np->tx_skb[i].skb = NULL; np->tx_skb[i].dma = 0; } } static int nv_init_ring(struct net_device *dev) { struct fe_priv *np = netdev_priv(dev); nv_init_tx(dev); nv_init_rx(dev); if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) return nv_alloc_rx(dev); else return nv_alloc_rx_optimized(dev); } static int nv_release_txskb(struct net_device *dev, struct nv_skb_map* tx_skb) { struct fe_priv *np = netdev_priv(dev); if (tx_skb->dma) { pci_unmap_page(np->pci_dev, tx_skb->dma, tx_skb->dma_len, PCI_DMA_TODEVICE); tx_skb->dma = 0; } if (tx_skb->skb) { dev_kfree_skb_any(tx_skb->skb); tx_skb->skb = NULL; return 1; } else { return 0; } } static void nv_drain_tx(struct net_device *dev) { struct fe_priv *np = netdev_priv(dev); unsigned int i; for (i = 0; i < np->tx_ring_size; i++) { if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) { np->tx_ring.orig[i].flaglen = 0; np->tx_ring.orig[i].buf = 0; } else { np->tx_ring.ex[i].flaglen = 0; np->tx_ring.ex[i].txvlan = 0; np->tx_ring.ex[i].bufhigh = 0; np->tx_ring.ex[i].buflow = 0; } if (nv_release_txskb(dev, &np->tx_skb[i])) dev->stats.tx_dropped++; } } static void nv_drain_rx(struct net_device *dev) { struct fe_priv *np = netdev_priv(dev); int i; for (i = 0; i < np->rx_ring_size; i++) { if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) { np->rx_ring.orig[i].flaglen = 0; np->rx_ring.orig[i].buf = 0; } else { np->rx_ring.ex[i].flaglen = 0; np->rx_ring.ex[i].txvlan = 0; np->rx_ring.ex[i].bufhigh = 0; np->rx_ring.ex[i].buflow = 0; } wmb(); if (np->rx_skb[i].skb) { pci_unmap_single(np->pci_dev, np->rx_skb[i].dma, (skb_end_pointer(np->rx_skb[i].skb) - np->rx_skb[i].skb->data), PCI_DMA_FROMDEVICE); dev_kfree_skb(np->rx_skb[i].skb); np->rx_skb[i].skb = NULL; } } } static void drain_ring(struct net_device *dev) { nv_drain_tx(dev); nv_drain_rx(dev); } static inline u32 nv_get_empty_tx_slots(struct fe_priv *np) { return (u32)(np->tx_ring_size - ((np->tx_ring_size + (np->put_tx_ctx - np->get_tx_ctx)) % np->tx_ring_size)); } /* * nv_start_xmit: dev->hard_start_xmit function * Called with netif_tx_lock held. */ static int nv_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct fe_priv *np = netdev_priv(dev); u32 tx_flags = 0; u32 tx_flags_extra = (np->desc_ver == DESC_VER_1 ? NV_TX_LASTPACKET : NV_TX2_LASTPACKET); unsigned int fragments = skb_shinfo(skb)->nr_frags; unsigned int i; u32 offset = 0; u32 bcnt; u32 size = skb->len-skb->data_len; u32 entries = (size >> NV_TX2_TSO_MAX_SHIFT) + ((size & (NV_TX2_TSO_MAX_SIZE-1)) ? 1 : 0); u32 empty_slots; struct ring_desc* put_tx; struct ring_desc* start_tx; struct ring_desc* prev_tx; struct nv_skb_map* prev_tx_ctx; /* add fragments to entries count */ for (i = 0; i < fragments; i++) { entries += (skb_shinfo(skb)->frags[i].size >> NV_TX2_TSO_MAX_SHIFT) + ((skb_shinfo(skb)->frags[i].size & (NV_TX2_TSO_MAX_SIZE-1)) ? 1 : 0); } empty_slots = nv_get_empty_tx_slots(np); if (unlikely(empty_slots <= entries)) { spin_lock_irq(&np->lock); netif_stop_queue(dev); np->tx_stop = 1; spin_unlock_irq(&np->lock); return NETDEV_TX_BUSY; } start_tx = put_tx = np->put_tx.orig; /* setup the header buffer */ do { prev_tx = put_tx; prev_tx_ctx = np->put_tx_ctx; bcnt = (size > NV_TX2_TSO_MAX_SIZE) ? NV_TX2_TSO_MAX_SIZE : size; np->put_tx_ctx->dma = pci_map_single(np->pci_dev, skb->data + offset, bcnt, PCI_DMA_TODEVICE); np->put_tx_ctx->dma_len = bcnt; put_tx->buf = cpu_to_le32(np->put_tx_ctx->dma); put_tx->flaglen = cpu_to_le32((bcnt-1) | tx_flags); tx_flags = np->tx_flags; offset += bcnt; size -= bcnt; if (unlikely(put_tx++ == np->last_tx.orig)) put_tx = np->first_tx.orig; if (unlikely(np->put_tx_ctx++ == np->last_tx_ctx)) np->put_tx_ctx = np->first_tx_ctx; } while (size); /* setup the fragments */ for (i = 0; i < fragments; i++) { skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; u32 size = frag->size; offset = 0; do { prev_tx = put_tx; prev_tx_ctx = np->put_tx_ctx; bcnt = (size > NV_TX2_TSO_MAX_SIZE) ? NV_TX2_TSO_MAX_SIZE : size; np->put_tx_ctx->dma = pci_map_page(np->pci_dev, frag->page, frag->page_offset+offset, bcnt, PCI_DMA_TODEVICE); np->put_tx_ctx->dma_len = bcnt; put_tx->buf = cpu_to_le32(np->put_tx_ctx->dma); put_tx->flaglen = cpu_to_le32((bcnt-1) | tx_flags); offset += bcnt; size -= bcnt; if (unlikely(put_tx++ == np->last_tx.orig)) put_tx = np->first_tx.orig; if (unlikely(np->put_tx_ctx++ == np->last_tx_ctx)) np->put_tx_ctx = np->first_tx_ctx; } while (size); } /* set last fragment flag */ prev_tx->flaglen |= cpu_to_le32(tx_flags_extra); /* save skb in this slot's context area */ prev_tx_ctx->skb = skb; if (skb_is_gso(skb)) tx_flags_extra = NV_TX2_TSO | (skb_shinfo(skb)->gso_size << NV_TX2_TSO_SHIFT); else tx_flags_extra = skb->ip_summed == CHECKSUM_PARTIAL ? NV_TX2_CHECKSUM_L3 | NV_TX2_CHECKSUM_L4 : 0; spin_lock_irq(&np->lock); /* set tx flags */ start_tx->flaglen |= cpu_to_le32(tx_flags | tx_flags_extra); np->put_tx.orig = put_tx; spin_unlock_irq(&np->lock); dprintk(KERN_DEBUG "%s: nv_start_xmit: entries %d queued for transmission. tx_flags_extra: %x\n", dev->name, entries, tx_flags_extra); { int j; for (j=0; j<64; j++) { if ((j%16) == 0) dprintk("\n%03x:", j); dprintk(" %02x", ((unsigned char*)skb->data)[j]); } dprintk("\n"); } dev->trans_start = jiffies; writel(NVREG_TXRXCTL_KICK|np->txrxctl_bits, get_hwbase(dev) + NvRegTxRxControl); return NETDEV_TX_OK; } static int nv_start_xmit_optimized(struct sk_buff *skb, struct net_device *dev) { struct fe_priv *np = netdev_priv(dev); u32 tx_flags = 0; u32 tx_flags_extra; unsigned int fragments = skb_shinfo(skb)->nr_frags; unsigned int i; u32 offset = 0; u32 bcnt; u32 size = skb->len-skb->data_len; u32 entries = (size >> NV_TX2_TSO_MAX_SHIFT) + ((size & (NV_TX2_TSO_MAX_SIZE-1)) ? 1 : 0); u32 empty_slots; struct ring_desc_ex* put_tx; struct ring_desc_ex* start_tx; struct ring_desc_ex* prev_tx; struct nv_skb_map* prev_tx_ctx; /* add fragments to entries count */ for (i = 0; i < fragments; i++) { entries += (skb_shinfo(skb)->frags[i].size >> NV_TX2_TSO_MAX_SHIFT) + ((skb_shinfo(skb)->frags[i].size & (NV_TX2_TSO_MAX_SIZE-1)) ? 1 : 0); } empty_slots = nv_get_empty_tx_slots(np); if (unlikely(empty_slots <= entries)) { spin_lock_irq(&np->lock); netif_stop_queue(dev); np->tx_stop = 1; spin_unlock_irq(&np->lock); return NETDEV_TX_BUSY; } start_tx = put_tx = np->put_tx.ex; /* setup the header buffer */ do { prev_tx = put_tx; prev_tx_ctx = np->put_tx_ctx; bcnt = (size > NV_TX2_TSO_MAX_SIZE) ? NV_TX2_TSO_MAX_SIZE : size; np->put_tx_ctx->dma = pci_map_single(np->pci_dev, skb->data + offset, bcnt, PCI_DMA_TODEVICE); np->put_tx_ctx->dma_len = bcnt; put_tx->bufhigh = cpu_to_le64(np->put_tx_ctx->dma) >> 32; put_tx->buflow = cpu_to_le64(np->put_tx_ctx->dma) & 0x0FFFFFFFF; put_tx->flaglen = cpu_to_le32((bcnt-1) | tx_flags); tx_flags = NV_TX2_VALID; offset += bcnt; size -= bcnt; if (unlikely(put_tx++ == np->last_tx.ex)) put_tx = np->first_tx.ex; if (unlikely(np->put_tx_ctx++ == np->last_tx_ctx)) np->put_tx_ctx = np->first_tx_ctx; } while (size); /* setup the fragments */ for (i = 0; i < fragments; i++) { skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; u32 size = frag->size; offset = 0; do { prev_tx = put_tx; prev_tx_ctx = np->put_tx_ctx; bcnt = (size > NV_TX2_TSO_MAX_SIZE) ? NV_TX2_TSO_MAX_SIZE : size; np->put_tx_ctx->dma = pci_map_page(np->pci_dev, frag->page, frag->page_offset+offset, bcnt, PCI_DMA_TODEVICE); np->put_tx_ctx->dma_len = bcnt; put_tx->bufhigh = cpu_to_le64(np->put_tx_ctx->dma) >> 32; put_tx->buflow = cpu_to_le64(np->put_tx_ctx->dma) & 0x0FFFFFFFF; put_tx->flaglen = cpu_to_le32((bcnt-1) | tx_flags); offset += bcnt; size -= bcnt; if (unlikely(put_tx++ == np->last_tx.ex)) put_tx = np->first_tx.ex; if (unlikely(np->put_tx_ctx++ == np->last_tx_ctx)) np->put_tx_ctx = np->first_tx_ctx; } while (size); } /* set last fragment flag */ prev_tx->flaglen |= cpu_to_le32(NV_TX2_LASTPACKET); /* save skb in this slot's context area */ prev_tx_ctx->skb = skb; if (skb_is_gso(skb)) tx_flags_extra = NV_TX2_TSO | (skb_shinfo(skb)->gso_size << NV_TX2_TSO_SHIFT); else tx_flags_extra = skb->ip_summed == CHECKSUM_PARTIAL ? NV_TX2_CHECKSUM_L3 | NV_TX2_CHECKSUM_L4 : 0; /* vlan tag */ if (likely(!np->vlangrp)) { start_tx->txvlan = 0; } else { if (vlan_tx_tag_present(skb)) start_tx->txvlan = cpu_to_le32(NV_TX3_VLAN_TAG_PRESENT | vlan_tx_tag_get(skb)); else start_tx->txvlan = 0; } spin_lock_irq(&np->lock); /* set tx flags */ start_tx->flaglen |= cpu_to_le32(tx_flags | tx_flags_extra); np->put_tx.ex = put_tx; spin_unlock_irq(&np->lock); dprintk(KERN_DEBUG "%s: nv_start_xmit_optimized: entries %d queued for transmission. tx_flags_extra: %x\n", dev->name, entries, tx_flags_extra); { int j; for (j=0; j<64; j++) { if ((j%16) == 0) dprintk("\n%03x:", j); dprintk(" %02x", ((unsigned char*)skb->data)[j]); } dprintk("\n"); } dev->trans_start = jiffies; writel(NVREG_TXRXCTL_KICK|np->txrxctl_bits, get_hwbase(dev) + NvRegTxRxControl); return NETDEV_TX_OK; } /* * nv_tx_done: check for completed packets, release the skbs. * * Caller must own np->lock. */ static void nv_tx_done(struct net_device *dev) { struct fe_priv *np = netdev_priv(dev); u32 flags; struct ring_desc* orig_get_tx = np->get_tx.orig; while ((np->get_tx.orig != np->put_tx.orig) && !((flags = le32_to_cpu(np->get_tx.orig->flaglen)) & NV_TX_VALID)) { dprintk(KERN_DEBUG "%s: nv_tx_done: flags 0x%x.\n", dev->name, flags); pci_unmap_page(np->pci_dev, np->get_tx_ctx->dma, np->get_tx_ctx->dma_len, PCI_DMA_TODEVICE); np->get_tx_ctx->dma = 0; if (np->desc_ver == DESC_VER_1) { if (flags & NV_TX_LASTPACKET) { if (flags & NV_TX_ERROR) { if (flags & NV_TX_UNDERFLOW) dev->stats.tx_fifo_errors++; if (flags & NV_TX_CARRIERLOST) dev->stats.tx_carrier_errors++; dev->stats.tx_errors++; } else { dev->stats.tx_packets++; dev->stats.tx_bytes += np->get_tx_ctx->skb->len; } dev_kfree_skb_any(np->get_tx_ctx->skb); np->get_tx_ctx->skb = NULL; } } else { if (flags & NV_TX2_LASTPACKET) { if (flags & NV_TX2_ERROR) { if (flags & NV_TX2_UNDERFLOW) dev->stats.tx_fifo_errors++; if (flags & NV_TX2_CARRIERLOST) dev->stats.tx_carrier_errors++; dev->stats.tx_errors++; } else { dev->stats.tx_packets++; dev->stats.tx_bytes += np->get_tx_ctx->skb->len; } dev_kfree_skb_any(np->get_tx_ctx->skb); np->get_tx_ctx->skb = NULL; } } if (unlikely(np->get_tx.orig++ == np->last_tx.orig)) np->get_tx.orig = np->first_tx.orig; if (unlikely(np->get_tx_ctx++ == np->last_tx_ctx)) np->get_tx_ctx = np->first_tx_ctx; } if (unlikely((np->tx_stop == 1) && (np->get_tx.orig != orig_get_tx))) {