via-*: Move the VIA drivers

Move the VIA drivers into drivers/net/ethernet/via/ and make the necessary Kconfig and Makefile changes. CC: Roger Luethi <rl@hellgate.ch> CC: Francois Romieu <romieu@fr.zoreil.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
author: Jeff Kirsher <jeffrey.t.kirsher@intel.com> 2011-05-20 20:43:09 -0700
committer: Jeff Kirsher <jeffrey.t.kirsher@intel.com> 2011-08-12 00:21:56 -0700
commit: f2148a472883ddf77626fff52b070655a8a0a788 (patch)
tree: 4224e4b1f7b7bbec8a5c5ebbd2ed1e2a69a89b9a /drivers/net/ethernet/via
parent: 527a626601de6ff89859de90883cc546892bf3ca (diff)
5 files changed, 7573 insertions, 0 deletions
diff --git a/drivers/net/ethernet/via/Kconfig b/drivers/net/ethernet/via/Kconfig
new file mode 100644
index 00000000000..7199194fa89
--- /dev/null
+++ b/drivers/net/ethernet/via/Kconfig
@@ -0,0 +1,56 @@
+#
+# VIA device configuration
+#
+
+config NET_VENDOR_VIA
+	bool "VIA 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
+	  <http://www.tldp.org/docs.html#howto>.
+
+	  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 VIA devices. If you say Y, you will be asked for
+	  your specific card in the following questions.
+
+if NET_VENDOR_VIA
+
+config VIA_RHINE
+	tristate "VIA Rhine support"
+	depends on PCI
+	select CRC32
+	select MII
+	---help---
+	  If you have a VIA "Rhine" based network card (Rhine-I (VT86C100A),
+	  Rhine-II (VT6102), or Rhine-III (VT6105)), say Y here. Rhine-type
+	  Ethernet functions can also be found integrated on South Bridges
+	  (e.g. VT8235).
+
+	  To compile this driver as a module, choose M here. The module
+	  will be called via-rhine.
+
+config VIA_RHINE_MMIO
+	bool "Use MMIO instead of PIO"
+	depends on VIA_RHINE
+	---help---
+	  This instructs the driver to use PCI shared memory (MMIO) instead of
+	  programmed I/O ports (PIO). Enabling this gives an improvement in
+	  processing time in parts of the driver.
+
+	  If unsure, say Y.
+
+config VIA_VELOCITY
+	tristate "VIA Velocity support"
+	depends on PCI
+	select CRC32
+	select CRC_CCITT
+	select MII
+	---help---
+	  If you have a VIA "Velocity" based network card say Y here.
+
+	  To compile this driver as a module, choose M here. The module
+	  will be called via-velocity.
+
+endif # NET_VENDOR_VIA
diff --git a/drivers/net/ethernet/via/Makefile b/drivers/net/ethernet/via/Makefile
new file mode 100644
index 00000000000..46c5d4a3d8f
--- /dev/null
+++ b/drivers/net/ethernet/via/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for the VIA device drivers.
+#
+
+obj-$(CONFIG_VIA_RHINE) += via-rhine.o
+obj-$(CONFIG_VIA_VELOCITY) += via-velocity.o
diff --git a/drivers/net/ethernet/via/via-rhine.c b/drivers/net/ethernet/via/via-rhine.c
new file mode 100644
index 00000000000..7f23ab913fd
--- /dev/null
+++ b/drivers/net/ethernet/via/via-rhine.c
@@ -0,0 +1,2340 @@
+/* via-rhine.c: A Linux Ethernet device driver for VIA Rhine family chips. */
+/*
+	Written 1998-2001 by Donald Becker.
+
+	Current Maintainer: Roger Luethi <rl@hellgate.ch>
+
+	This software may be used and distributed according to the terms of
+	the GNU General Public License (GPL), incorporated herein by reference.
+	Drivers based on or derived from this code fall under the GPL and must
+	retain the authorship, copyright and license notice.  This file is not
+	a complete program and may only be used when the entire operating
+	system is licensed under the GPL.
+
+	This driver is designed for the VIA VT86C100A Rhine-I.
+	It also works with the Rhine-II (6102) and Rhine-III (6105/6105L/6105LOM
+	and management NIC 6105M).
+
+	The author may be reached as becker@scyld.com, or C/O
+	Scyld Computing Corporation
+	410 Severn Ave., Suite 210
+	Annapolis MD 21403
+
+
+	This driver contains some changes from the original Donald Becker
+	version. He may or may not be interested in bug reports on this
+	code. You can find his versions at:
+	http://www.scyld.com/network/via-rhine.html
+	[link no longer provides useful info -jgarzik]
+
+*/
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#define DRV_NAME	"via-rhine"
+#define DRV_VERSION	"1.5.0"
+#define DRV_RELDATE	"2010-10-09"
+
+
+/* A few user-configurable values.
+   These may be modified when a driver module is loaded. */
+
+#define DEBUG
+static int debug = 1;	/* 1 normal messages, 0 quiet .. 7 verbose. */
+static int max_interrupt_work = 20;
+
+/* Set the copy breakpoint for the copy-only-tiny-frames scheme.
+   Setting to > 1518 effectively disables this feature. */
+#if defined(__alpha__) || defined(__arm__) || defined(__hppa__) || \
+	defined(CONFIG_SPARC) || defined(__ia64__) ||		   \
+	defined(__sh__) || defined(__mips__)
+static int rx_copybreak = 1518;
+#else
+static int rx_copybreak;
+#endif
+
+/* Work-around for broken BIOSes: they are unable to get the chip back out of
+   power state D3 so PXE booting fails. bootparam(7): via-rhine.avoid_D3=1 */
+static int avoid_D3;
+
+/*
+ * In case you are looking for 'options[]' or 'full_duplex[]', they
+ * are gone. Use ethtool(8) instead.
+ */
+
+/* Maximum number of multicast addresses to filter (vs. rx-all-multicast).
+   The Rhine has a 64 element 8390-like hash table. */
+static const int multicast_filter_limit = 32;
+
+
+/* Operational parameters that are set at compile time. */
+
+/* Keep the ring sizes a power of two for compile efficiency.
+   The compiler will convert <unsigned>'%'<2^N> into a bit mask.
+   Making the Tx ring too large decreases the effectiveness of channel
+   bonding and packet priority.
+   There are no ill effects from too-large receive rings. */
+#define TX_RING_SIZE	16
+#define TX_QUEUE_LEN	10	/* Limit ring entries actually used. */
+#define RX_RING_SIZE	64
+
+/* Operational parameters that usually are not changed. */
+
+/* Time in jiffies before concluding the transmitter is hung. */
+#define TX_TIMEOUT	(2*HZ)
+
+#define PKT_BUF_SZ	1536	/* Size of each temporary Rx buffer.*/
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/dma-mapping.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/crc32.h>
+#include <linux/if_vlan.h>
+#include <linux/bitops.h>
+#include <linux/workqueue.h>
+#include <asm/processor.h>	/* Processor type for cache alignment. */
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <linux/dmi.h>
+
+/* These identify the driver base version and may not be removed. */
+static const char version[] __devinitconst =
+	"v1.10-LK" DRV_VERSION " " DRV_RELDATE " Written by Donald Becker";
+
+/* This driver was written to use PCI memory space. Some early versions
+   of the Rhine may only work correctly with I/O space accesses. */
+#ifdef CONFIG_VIA_RHINE_MMIO
+#define USE_MMIO
+#else
+#endif
+
+MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
+MODULE_DESCRIPTION("VIA Rhine PCI Fast Ethernet driver");
+MODULE_LICENSE("GPL");
+
+module_param(max_interrupt_work, int, 0);
+module_param(debug, int, 0);
+module_param(rx_copybreak, int, 0);
+module_param(avoid_D3, bool, 0);
+MODULE_PARM_DESC(max_interrupt_work, "VIA Rhine maximum events handled per interrupt");
+MODULE_PARM_DESC(debug, "VIA Rhine debug level (0-7)");
+MODULE_PARM_DESC(rx_copybreak, "VIA Rhine copy breakpoint for copy-only-tiny-frames");
+MODULE_PARM_DESC(avoid_D3, "Avoid power state D3 (work-around for broken BIOSes)");
+
+#define MCAM_SIZE	32
+#define VCAM_SIZE	32
+
+/*
+		Theory of Operation
+
+I. Board Compatibility
+
+This driver is designed for the VIA 86c100A Rhine-II PCI Fast Ethernet
+controller.
+
+II. Board-specific settings
+
+Boards with this chip are functional only in a bus-master PCI slot.
+
+Many operational settings are loaded from the EEPROM to the Config word at
+offset 0x78. For most of these settings, this driver assumes that they are
+correct.
+If this driver is compiled to use PCI memory space operations the EEPROM
+must be configured to enable memory ops.
+
+III. Driver operation
+
+IIIa. Ring buffers
+
+This driver uses two statically allocated fixed-size descriptor lists
+formed into rings by a branch from the final descriptor to the beginning of
+the list. The ring sizes are set at compile time by RX/TX_RING_SIZE.
+
+IIIb/c. Transmit/Receive Structure
+
+This driver attempts to use a zero-copy receive and transmit scheme.
+
+Alas, all data buffers are required to start on a 32 bit boundary, so
+the driver must often copy transmit packets into bounce buffers.
+
+The driver allocates full frame size skbuffs for the Rx ring buffers at
+open() time and passes the skb->data field to the chip as receive data
+buffers. When an incoming frame is less than RX_COPYBREAK bytes long,
+a fresh skbuff is allocated and the frame is copied to the new skbuff.
+When the incoming frame is larger, the skbuff is passed directly up the
+protocol stack. Buffers consumed this way are replaced by newly allocated
+skbuffs in the last phase of rhine_rx().
+
+The RX_COPYBREAK value is chosen to trade-off the memory wasted by
+using a full-sized skbuff for small frames vs. the copying costs of larger
+frames. New boards are typically used in generously configured machines
+and the underfilled buffers have negligible impact compared to the benefit of
+a single allocation size, so the default value of zero results in never
+copying packets. When copying is done, the cost is usually mitigated by using
+a combined copy/checksum routine. Copying also preloads the cache, which is
+most useful with small frames.
+
+Since the VIA chips are only able to transfer data to buffers on 32 bit
+boundaries, the IP header at offset 14 in an ethernet frame isn't
+longword aligned for further processing. Copying these unaligned buffers
+has the beneficial effect of 16-byte aligning the IP header.
+
+IIId. Synchronization
+
+The driver runs as two independent, single-threaded flows of control. One
+is the send-packet routine, which enforces single-threaded use by the
+netdev_priv(dev)->lock spinlock. The other thread is the interrupt handler,
+which is single threaded by the hardware and interrupt handling software.
+
+The send packet thread has partial control over the Tx ring. It locks the
+netdev_priv(dev)->lock whenever it's queuing a Tx packet. If the next slot in
+the ring is not available it stops the transmit queue by
+calling netif_stop_queue.
+
+The interrupt handler has exclusive control over the Rx ring and records stats
+from the Tx ring. After reaping the stats, it marks the Tx queue entry as
+empty by incrementing the dirty_tx mark. If at least half of the entries in
+the Rx ring are available the transmit queue is woken up if it was stopped.
+
+IV. Notes
+
+IVb. References
+
+Preliminary VT86C100A manual from http://www.via.com.tw/
+http://www.scyld.com/expert/100mbps.html
+http://www.scyld.com/expert/NWay.html
+ftp://ftp.via.com.tw/public/lan/Products/NIC/VT86C100A/Datasheet/VT86C100A03.pdf
+ftp://ftp.via.com.tw/public/lan/Products/NIC/VT6102/Datasheet/VT6102_021.PDF
+
+
+IVc. Errata
+
+The VT86C100A manual is not reliable information.
+The 3043 chip does not handle unaligned transmit or receive buffers, resulting
+in significant performance degradation for bounce buffer copies on transmit
+and unaligned IP headers on receive.
+The chip does not pad to minimum transmit length.
+
+*/
+
+
+/* This table drives the PCI probe routines. It's mostly boilerplate in all
+   of the drivers, and will likely be provided by some future kernel.
+   Note the matching code -- the first table entry matchs all 56** cards but
+   second only the 1234 card.
+*/
+
+enum rhine_revs {
+	VT86C100A	= 0x00,
+	VTunknown0	= 0x20,
+	VT6102		= 0x40,
+	VT8231		= 0x50,	/* Integrated MAC */
+	VT8233		= 0x60,	/* Integrated MAC */
+	VT8235		= 0x74,	/* Integrated MAC */
+	VT8237		= 0x78,	/* Integrated MAC */
+	VTunknown1	= 0x7C,
+	VT6105		= 0x80,
+	VT6105_B0	= 0x83,
+	VT6105L		= 0x8A,
+	VT6107		= 0x8C,
+	VTunknown2	= 0x8E,
+	VT6105M		= 0x90,	/* Management adapter */
+};
+
+enum rhine_quirks {
+	rqWOL		= 0x0001,	/* Wake-On-LAN support */
+	rqForceReset	= 0x0002,
+	rq6patterns	= 0x0040,	/* 6 instead of 4 patterns for WOL */
+	rqStatusWBRace	= 0x0080,	/* Tx Status Writeback Error possible */
+	rqRhineI	= 0x0100,	/* See comment below */
+};
+/*
+ * rqRhineI: VT86C100A (aka Rhine-I) uses different bits to enable
+ * MMIO as well as for the collision counter and the Tx FIFO underflow
+ * indicator. In addition, Tx and Rx buffers need to 4 byte aligned.
+ */
+
+/* Beware of PCI posted writes */
+#define IOSYNC	do { ioread8(ioaddr + StationAddr); } while (0)
+
+static DEFINE_PCI_DEVICE_TABLE(rhine_pci_tbl) = {
+	{ 0x1106, 0x3043, PCI_ANY_ID, PCI_ANY_ID, },	/* VT86C100A */
+	{ 0x1106, 0x3065, PCI_ANY_ID, PCI_ANY_ID, },	/* VT6102 */
+	{ 0x1106, 0x3106, PCI_ANY_ID, PCI_ANY_ID, },	/* 6105{,L,LOM} */
+	{ 0x1106, 0x3053, PCI_ANY_ID, PCI_ANY_ID, },	/* VT6105M */
+	{ }	/* terminate list */
+};
+MODULE_DEVICE_TABLE(pci, rhine_pci_tbl);
+
+
+/* Offsets to the device registers. */
+enum register_offsets {
+	StationAddr=0x00, RxConfig=0x06, TxConfig=0x07, ChipCmd=0x08,
+	ChipCmd1=0x09, TQWake=0x0A,
+	IntrStatus=0x0C, IntrEnable=0x0E,
+	MulticastFilter0=0x10, MulticastFilter1=0x14,
+	RxRingPtr=0x18, TxRingPtr=0x1C, GFIFOTest=0x54,
+	MIIPhyAddr=0x6C, MIIStatus=0x6D, PCIBusConfig=0x6E, PCIBusConfig1=0x6F,
+	MIICmd=0x70, MIIRegAddr=0x71, MIIData=0x72, MACRegEEcsr=0x74,
+	ConfigA=0x78, ConfigB=0x79, ConfigC=0x7A, ConfigD=0x7B,
+	RxMissed=0x7C, RxCRCErrs=0x7E, MiscCmd=0x81,
+	StickyHW=0x83, IntrStatus2=0x84,
+	CamMask=0x88, CamCon=0x92, CamAddr=0x93,
+	WOLcrSet=0xA0, PwcfgSet=0xA1, WOLcgSet=0xA3, WOLcrClr=0xA4,
+	WOLcrClr1=0xA6, WOLcgClr=0xA7,
+	PwrcsrSet=0xA8, PwrcsrSet1=0xA9, PwrcsrClr=0xAC, PwrcsrClr1=0xAD,
+};
+
+/* Bits in ConfigD */
+enum backoff_bits {
+	BackOptional=0x01, BackModify=0x02,
+	BackCaptureEffect=0x04, BackRandom=0x08
+};
+
+/* Bits in the TxConfig (TCR) register */
+enum tcr_bits {
+	TCR_PQEN=0x01,
+	TCR_LB0=0x02,		/* loopback[0] */
+	TCR_LB1=0x04,		/* loopback[1] */
+	TCR_OFSET=0x08,
+	TCR_RTGOPT=0x10,
+	TCR_RTFT0=0x20,
+	TCR_RTFT1=0x40,
+	TCR_RTSF=0x80,
+};
+
+/* Bits in the CamCon (CAMC) register */
+enum camcon_bits {
+	CAMC_CAMEN=0x01,
+	CAMC_VCAMSL=0x02,
+	CAMC_CAMWR=0x04,
+	CAMC_CAMRD=0x08,
+};
+
+/* Bits in the PCIBusConfig1 (BCR1) register */
+enum bcr1_bits {
+	BCR1_POT0=0x01,
+	BCR1_POT1=0x02,
+	BCR1_POT2=0x04,
+	BCR1_CTFT0=0x08,
+	BCR1_CTFT1=0x10,
+	BCR1_CTSF=0x20,
+	BCR1_TXQNOBK=0x40,	/* for VT6105 */
+	BCR1_VIDFR=0x80,	/* for VT6105 */
+	BCR1_MED0=0x40,		/* for VT6102 */
+	BCR1_MED1=0x80,		/* for VT6102 */
+};
+
+#ifdef USE_MMIO
+/* Registers we check that mmio and reg are the same. */
+static const int mmio_verify_registers[] = {
+	RxConfig, TxConfig, IntrEnable, ConfigA, ConfigB, ConfigC, ConfigD,
+	0
+};
+#endif
+
+/* Bits in the interrupt status/mask registers. */
+enum intr_status_bits {
+	IntrRxDone=0x0001, IntrRxErr=0x0004, IntrRxEmpty=0x0020,
+	IntrTxDone=0x0002, IntrTxError=0x0008, IntrTxUnderrun=0x0210,
+	IntrPCIErr=0x0040,
+	IntrStatsMax=0x0080, IntrRxEarly=0x0100,
+	IntrRxOverflow=0x0400, IntrRxDropped=0x0800, IntrRxNoBuf=0x1000,
+	IntrTxAborted=0x2000, IntrLinkChange=0x4000,
+	IntrRxWakeUp=0x8000,
+	IntrNormalSummary=0x0003, IntrAbnormalSummary=0xC260,
+	IntrTxDescRace=0x080000,	/* mapped from IntrStatus2 */
+	IntrTxErrSummary=0x082218,
+};
+
+/* Bits in WOLcrSet/WOLcrClr and PwrcsrSet/PwrcsrClr */
+enum wol_bits {
+	WOLucast	= 0x10,
+	WOLmagic	= 0x20,
+	WOLbmcast	= 0x30,
+	WOLlnkon	= 0x40,
+	WOLlnkoff	= 0x80,
+};
+
+/* The Rx and Tx buffer descriptors. */
+struct rx_desc {
+	__le32 rx_status;
+	__le32 desc_length; /* Chain flag, Buffer/frame length */
+	__le32 addr;
+	__le32 next_desc;
+};
+struct tx_desc {
+	__le32 tx_status;
+	__le32 desc_length; /* Chain flag, Tx Config, Frame length */
+	__le32 addr;
+	__le32 next_desc;
+};
+
+/* Initial value for tx_desc.desc_length, Buffer size goes to bits 0-10 */
+#define TXDESC		0x00e08000
+
+enum rx_status_bits {
+	RxOK=0x8000, RxWholePkt=0x0300, RxErr=0x008F
+};
+
+/* Bits in *_desc.*_status */
+enum desc_status_bits {
+	DescOwn=0x80000000
+};
+
+/* Bits in *_desc.*_length */
+enum desc_length_bits {
+	DescTag=0x00010000
+};
+
+/* Bits in ChipCmd. */
+enum chip_cmd_bits {
+	CmdInit=0x01, CmdStart=0x02, CmdStop=0x04, CmdRxOn=0x08,
+	CmdTxOn=0x10, Cmd1TxDemand=0x20, CmdRxDemand=0x40,
+	Cmd1EarlyRx=0x01, Cmd1EarlyTx=0x02, Cmd1FDuplex=0x04,
+	Cmd1NoTxPoll=0x08, Cmd1Reset=0x80,
+};
+
+struct rhine_private {
+	/* Bit mask for configured VLAN ids */
+	unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
+
+	/* Descriptor rings */
+	struct rx_desc *rx_ring;
+	struct tx_desc *tx_ring;
+	dma_addr_t rx_ring_dma;
+	dma_addr_t tx_ring_dma;
+
+	/* The addresses of receive-in-place skbuffs. */
+	struct sk_buff *rx_skbuff[RX_RING_SIZE];
+	dma_addr_t rx_skbuff_dma[RX_RING_SIZE];
+
+	/* The saved address of a sent-in-place packet/buffer, for later free(). */
+	struct sk_buff *tx_skbuff[TX_RING_SIZE];
+	dma_addr_t tx_skbuff_dma[TX_RING_SIZE];
+
+	/* Tx bounce buffers (Rhine-I only) */
+	unsigned char *tx_buf[TX_RING_SIZE];
+	unsigned char *tx_bufs;
+	dma_addr_t tx_bufs_dma;
+
+	struct pci_dev *pdev;
+	long pioaddr;
+	struct net_device *dev;
+	struct napi_struct napi;
+	spinlock_t lock;
+	struct work_struct reset_task;
+
+	/* Frequently used values: keep some adjacent for cache effect. */
+	u32 quirks;
+	struct rx_desc *rx_head_desc;
+	unsigned int cur_rx, dirty_rx;	/* Producer/consumer ring indices */
+	unsigned int cur_tx, dirty_tx;
+	unsigned int rx_buf_sz;		/* Based on MTU+slack. */
+	u8 wolopts;
+
+	u8 tx_thresh, rx_thresh;
+
+	struct mii_if_info mii_if;
+	void __iomem *base;
+};
+
+#define BYTE_REG_BITS_ON(x, p)      do { iowrite8((ioread8((p))|(x)), (p)); } while (0)
+#define WORD_REG_BITS_ON(x, p)      do { iowrite16((ioread16((p))|(x)), (p)); } while (0)
+#define DWORD_REG_BITS_ON(x, p)     do { iowrite32((ioread32((p))|(x)), (p)); } while (0)
+
+#define BYTE_REG_BITS_IS_ON(x, p)   (ioread8((p)) & (x))
+#define WORD_REG_BITS_IS_ON(x, p)   (ioread16((p)) & (x))
+#define DWORD_REG_BITS_IS_ON(x, p)  (ioread32((p)) & (x))
+
+#define BYTE_REG_BITS_OFF(x, p)     do { iowrite8(ioread8((p)) & (~(x)), (p)); } while (0)
+#define WORD_REG_BITS_OFF(x, p)     do { iowrite16(ioread16((p)) & (~(x)), (p)); } while (0)
+#define DWORD_REG_BITS_OFF(x, p)    do { iowrite32(ioread32((p)) & (~(x)), (p)); } while (0)
+
+#define BYTE_REG_BITS_SET(x, m, p)   do { iowrite8((ioread8((p)) & (~(m)))|(x), (p)); } while (0)
+#define WORD_REG_BITS_SET(x, m, p)   do { iowrite16((ioread16((p)) & (~(m)))|(x), (p)); } while (0)
+#define DWORD_REG_BITS_SET(x, m, p)  do { iowrite32((ioread32((p)) & (~(m)))|(x), (p)); } while (0)
+
+
+static int  mdio_read(struct net_device *dev, int phy_id, int location);
+static void mdio_write(struct net_device *dev, int phy_id, int location, int value);
+static int  rhine_open(struct net_device *dev);
+static void rhine_reset_task(struct work_struct *work);
+static void rhine_tx_timeout(struct net_device *dev);
+static netdev_tx_t rhine_start_tx(struct sk_buff *skb,
+				  struct net_device *dev);
+static irqreturn_t rhine_interrupt(int irq, void *dev_instance);
+static void rhine_tx(struct net_device *dev);
+static int rhine_rx(struct net_device *dev, int limit);
+static void rhine_error(struct net_device *dev, int intr_status);
+static void rhine_set_rx_mode(struct net_device *dev);
+static struct net_device_stats *rhine_get_stats(struct net_device *dev);
+static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
+static const struct ethtool_ops netdev_ethtool_ops;
+static int  rhine_close(struct net_device *dev);
+static void rhine_shutdown (struct pci_dev *pdev);
+static void rhine_vlan_rx_add_vid(struct net_device *dev, unsigned short vid);
+static void rhine_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid);
+static void rhine_set_cam(void __iomem *ioaddr, int idx, u8 *addr);
+static void rhine_set_vlan_cam(void __iomem *ioaddr, int idx, u8 *addr);
+static void rhine_set_cam_mask(void __iomem *ioaddr, u32 mask);
+static void rhine_set_vlan_cam_mask(void __iomem *ioaddr, u32 mask);
+static void rhine_init_cam_filter(struct net_device *dev);
+static void rhine_update_vcam(struct net_device *dev);
+
+#define RHINE_WAIT_FOR(condition)				\
+do {								\
+	int i = 1024;						\
+	while (!(condition) && --i)				\
+		;						\
+	if (debug > 1 && i < 512)				\
+		pr_info("%4d cycles used @ %s:%d\n",		\
+			1024 - i, __func__, __LINE__);		\
+} while (0)
+
+static inline u32 get_intr_status(struct net_device *dev)
+{
+	struct rhine_private *rp = netdev_priv(dev);
+	void __iomem *ioaddr = rp->base;
+	u32 intr_status;
+
+	intr_status = ioread16(ioaddr + IntrStatus);
+	/* On Rhine-II, Bit 3 indicates Tx descriptor write-back race. */
+	if (rp->quirks & rqStatusWBRace)
+		intr_status |= ioread8(ioaddr + IntrStatus2) << 16;
+	return intr_status;
+}
+
+/*
+ * Get power related registers into sane state.
+ * Notify user about past WOL event.
+ */
+static void rhine_power_init(struct net_device *dev)
+{
+	struct rhine_private *rp = netdev_priv(dev);
+	void __iomem *ioaddr = rp->base;
+	u16 wolstat;
+
+	if (rp->quirks & rqWOL) {
+		/* Make sure chip is in power state D0 */
+		iowrite8(ioread8(ioaddr + StickyHW) & 0xFC, ioaddr + StickyHW);
+
+		/* Disable "force PME-enable" */
+		iowrite8(0x80, ioaddr + WOLcgClr);
+
+		/* Clear power-event config bits (WOL) */
+		iowrite8(0xFF, ioaddr + WOLcrClr);
+		/* More recent cards can manage two additional patterns */
+		if (rp->quirks & rq6patterns)
+			iowrite8(0x03, ioaddr + WOLcrClr1);
+
+		/* Save power-event status bits */
+		wolstat = ioread8(ioaddr + PwrcsrSet);
+		if (rp->quirks & rq6patterns)
+			wolstat |= (ioread8(ioaddr + PwrcsrSet1) & 0x03) << 8;
+
+		/* Clear power-event status bits */
+		iowrite8(0xFF, ioaddr + PwrcsrClr);
+		if (rp->quirks & rq6patterns)
+			iowrite8(0x03, ioaddr + PwrcsrClr1);
+
+		if (wolstat) {
+			char *reason;
+			switch (wolstat) {
+			case WOLmagic:
+				reason = "Magic packet";
+				break;
+			case WOLlnkon:
+				reason = "Link went up";
+				break;
+			case WOLlnkoff:
+				reason = "Link went down";
+				break;
+			case WOLucast:
+				reason = "Unicast packet";
+				break;
+			case WOLbmcast:
+				reason = "Multicast/broadcast packet";
+				break;
+			default:
+				reason = "Unknown";
+			}
+			netdev_info(dev, "Woke system up. Reason: %s\n",
+				    reason);
+		}
+	}
+}
+
+static void rhine_chip_reset(struct net_device *dev)
+{
+	struct rhine_private *rp = netdev_priv(dev);
+	void __iomem *ioaddr = rp->base;
+
+	iowrite8(Cmd1Reset, ioaddr + ChipCmd1);
+	IOSYNC;
+
+	if (ioread8(ioaddr + ChipCmd1) & Cmd1Reset) {
+		netdev_info(dev, "Reset not complete yet. Trying harder.\n");
+
+		/* Force reset */
+		if (rp->quirks & rqForceReset)
+			iowrite8(0x40, ioaddr + MiscCmd);
+
+		/* Reset can take somewhat longer (rare) */
+		RHINE_WAIT_FOR(!(ioread8(ioaddr + ChipCmd1) & Cmd1Reset));
+	}
+
+	if (debug > 1)
+		netdev_info(dev, "Reset %s\n",
+			    (ioread8(ioaddr + ChipCmd1) & Cmd1Reset) ?
+			    "failed" : "succeeded");
+}
+
+#ifdef USE_MMIO
+static void enable_mmio(long pioaddr, u32 quirks)
+{
+	int n;
+	if (quirks & rqRhineI) {
+		/* More recent docs say that this bit is reserved ... */
+		n = inb(pioaddr + ConfigA) | 0x20;
+		outb(n, pioaddr + ConfigA);
+	} else {
+		n = inb(pioaddr + ConfigD) | 0x80;
+		outb(n, pioaddr + ConfigD);
+	}
+}
+#endif
+
+/*
+ * Loads bytes 0x00-0x05, 0x6E-0x6F, 0x78-0x7B from EEPROM
+ * (plus 0x6C for Rhine-I/II)
+ */
+static void __devinit rhine_reload_eeprom(long pioaddr, struct net_device *dev)
+{
+	struct rhine_private *rp = netdev_priv(dev);
+	void __iomem *ioaddr = rp->base;
+
+	outb(0x20, pioaddr + MACRegEEcsr);
+	RHINE_WAIT_FOR(!(inb(pioaddr + MACRegEEcsr) & 0x20));
+
+#ifdef USE_MMIO
+	/*
+	 * Reloading from EEPROM overwrites ConfigA-D, so we must re-enable
+	 * MMIO. If reloading EEPROM was done first this could be avoided, but
+	 * it is not known if that still works with the "win98-reboot" problem.
+	 */
+	enable_mmio(pioaddr, rp->quirks);
+#endif
+
+	/* Turn off EEPROM-controlled wake-up (magic packet) */
+	if (rp->quirks & rqWOL)
+		iowrite8(ioread8(ioaddr + ConfigA) & 0xFC, ioaddr + ConfigA);
+
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void rhine_poll(struct net_device *dev)
+{
+	disable_irq(dev->irq);
+	rhine_interrupt(dev->irq, (void *)dev);
+	enable_irq(dev->irq);
+}
+#endif
+
+static int rhine_napipoll(struct napi_struct *napi, int budget)
+{
+	struct rhine_private *rp = container_of(napi, struct rhine_private, napi);
+	struct net_device *dev = rp->dev;
+	void __iomem *ioaddr = rp->base;
+	int work_done;
+
+	work_done = rhine_rx(dev, budget);
+
+	if (work_done < budget) {
+		napi_complete(napi);
+
+		iowrite16(IntrRxDone | IntrRxErr | IntrRxEmpty| IntrRxOverflow |
+			  IntrRxDropped | IntrRxNoBuf | IntrTxAborted |
+			  IntrTxDone | IntrTxError | IntrTxUnderrun |
+			  IntrPCIErr | IntrStatsMax | IntrLinkChange,
+			  ioaddr + IntrEnable);
+	}
+	return work_done;
+}
+
+static void __devinit rhine_hw_init(struct net_device *dev, long pioaddr)
+{
+	struct rhine_private *rp = netdev_priv(dev);
+
+	/* Reset the chip to erase previous misconfiguration. */
+	rhine_chip_reset(dev);
+
+	/* Rhine-I needs extra time to recuperate before EEPROM reload */
+	if (rp->quirks & rqRhineI)
+		msleep(5);
+
+	/* Reload EEPROM controlled bytes cleared by soft reset */
+	rhine_reload_eeprom(pioaddr, dev);
+}
+
+static const struct net_device_ops rhine_netdev_ops = {
+	.ndo_open		 = rhine_open,
+	.ndo_stop		 = rhine_close,
+	.ndo_start_xmit		 = rhine_start_tx,
+	.ndo_get_stats		 = rhine_get_stats,
+	.ndo_set_multicast_list	 = rhine_set_rx_mode,
+	.ndo_change_mtu		 = eth_change_mtu,
+	.ndo_validate_addr	 = eth_validate_addr,
+	.ndo_set_mac_address 	 = eth_mac_addr,
+	.ndo_do_ioctl		 = netdev_ioctl,
+	.ndo_tx_timeout 	 = rhine_tx_timeout,
+	.ndo_vlan_rx_add_vid	 = rhine_vlan_rx_add_vid,
+	.ndo_vlan_rx_kill_vid	 = rhine_vlan_rx_kill_vid,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	.ndo_poll_controller	 = rhine_poll,
+#endif
+};
+
+static int __devinit rhine_init_one(struct pci_dev *pdev,
+				    const struct pci_device_id *ent)
+{
+	struct net_device *dev;
+	struct rhine_private *rp;
+	int i, rc;
+	u32 quirks;
+	long pioaddr;
+	long memaddr;
+	void __iomem *ioaddr;
+	int io_size, phy_id;
+	const char *name;
+#ifdef USE_MMIO
+	int bar = 1;
+#else
+	int bar = 0;
+#endif
+
+/* when built into the kernel, we only print version if device is found */
+#ifndef MODULE
+	pr_info_once("%s\n", version);
+#endif
+
+	io_size = 256;
+	phy_id = 0;
+	quirks = 0;
+	name = "Rhine";
+	if (pdev->revision < VTunknown0) {
+		quirks = rqRhineI;
+		io_size = 128;
+	}
+	else if (pdev->revision >= VT6102) {
+		quirks = rqWOL | rqForceReset;
+		if (pdev->revision < VT6105) {
+			name = "Rhine II";
+			quirks |= rqStatusWBRace;	/* Rhine-II exclusive */
+		}
+		else {
+			phy_id = 1;	/* Integrated PHY, phy_id fixed to 1 */
+			if (pdev->revision >= VT6105_B0)
+				quirks |= rq6patterns;
+			if (pdev->revision < VT6105M)
+				name = "Rhine III";
+			else
+				name = "Rhine III (Management Adapter)";
+		}
+	}
+
+	rc = pci_enable_device(pdev);
+	if (rc)
+		goto err_out;
+
+	/* this should always be supported */
+	rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+	if (rc) {
+		dev_err(&pdev->dev,
+			"32-bit PCI DMA addresses not supported by the card!?\n");
+		goto err_out;
+	}
+
+	/* sanity check */
+	if ((pci_resource_len(pdev, 0) < io_size) ||
+	    (pci_resource_len(pdev, 1) < io_size)) {
+		rc = -EIO;
+		dev_err(&pdev->dev, "Insufficient PCI resources, aborting\n");
+		goto err_out;
+	}
+
+	pioaddr = pci_resource_start(pdev, 0);
+	memaddr = pci_resource_start(pdev, 1);
+
+	pci_set_master(pdev);
+
+	dev = alloc_etherdev(sizeof(struct rhine_private));
+	if (!dev) {
+		rc = -ENOMEM;
+		dev_err(&pdev->dev, "alloc_etherdev failed\n");
+		goto err_out;
+	}
+	SET_NETDEV_DEV(dev, &pdev->dev);
+
+	rp = netdev_priv(dev);
+	rp->dev = dev;
+	rp->quirks = quirks;
+	rp->pioaddr = pioaddr;
+	rp->pdev = pdev;
+
+	rc = pci_request_regions(pdev, DRV_NAME);
+	if (rc)
+		goto err_out_free_netdev;
+
+	ioaddr = pci_iomap(pdev, bar, io_size);
+	if (!ioaddr) {
+		rc = -EIO;
+		dev_err(&pdev->dev,
+			"ioremap failed for device %s, region 0x%X @ 0x%lX\n",
+			pci_name(pdev), io_size, memaddr);
+		goto err_out_free_res;
+	}
+
+#ifdef USE_MMIO
+	enable_mmio(pioaddr, quirks);
+
+	/* Check that selected MMIO registers match the PIO ones */
+	i = 0;
+	while (mmio_verify_registers[i]) {
+		int reg = mmio_verify_registers[i++];
+		unsigned char a = inb(pioaddr+reg);
+		unsigned char b = readb(ioaddr+reg);
+		if (a != b) {
+			rc = -EIO;
+			dev_err(&pdev->dev,
+				"MMIO do not match PIO [%02x] (%02x != %02x)\n",
+				reg, a, b);
+			goto err_out_unmap;
+		}
+	}
+#endif /* USE_MMIO */
+
+	dev->base_addr = (unsigned long)ioaddr;
+	rp->base = ioaddr;
+
+	/* Get chip registers into a sane state */
+	rhine_power_init(dev);
+	rhine_hw_init(dev, pioaddr);
+
+	for (i = 0; i < 6; i++)
+		dev->dev_addr[i] = ioread8(ioaddr + StationAddr + i);
+
+	if (!is_valid_ether_addr(dev->dev_addr)) {
+		/* Report it and use a random ethernet address instead */
+		netdev_err(dev, "Invalid MAC address: %pM\n", dev->dev_addr);
+		random_ether_addr(dev->dev_addr);
+		netdev_info(dev, "Using random MAC address: %pM\n",
+			    dev->dev_addr);
+	}
+	memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
+
+	/* For Rhine-I/II, phy_id is loaded from EEPROM */
+	if (!phy_id)
+		phy_id = ioread8(ioaddr + 0x6C);
+
+	dev->irq = pdev->irq;
+
+	spin_lock_init(&rp->lock);
+	INIT_WORK(&rp->reset_task, rhine_reset_task);
+
+	rp->mii_if.dev = dev;
+	rp->mii_if.mdio_read = mdio_read;
+	rp->mii_if.mdio_write = mdio_write;
+	rp->mii_if.phy_id_mask = 0x1f;
+	rp->mii_if.reg_num_mask = 0x1f;
+
+	/* The chip-specific entries in the device structure. */
+	dev->netdev_ops = &rhine_netdev_ops;
+	dev->ethtool_ops = &netdev_ethtool_ops,
+	dev->watchdog_timeo = TX_TIMEOUT;
+
+	netif_napi_add(dev, &rp->napi, rhine_napipoll, 64);
+
+	if (rp->quirks & rqRhineI)
+		dev->features |= NETIF_F_SG|NETIF_F_HW_CSUM;
+
+	if (pdev->revision >= VT6105M)
+		dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
+		NETIF_F_HW_VLAN_FILTER;
+
+	/* dev->name not defined before register_netdev()! */
+	rc = register_netdev(dev);
+	if (rc)
+		goto err_out_unmap;
+
+	netdev_info(dev, "VIA %s at 0x%lx, %pM, IRQ %d\n",
+		    name,
+#ifdef USE_MMIO
+		    memaddr,
+#else
+		    (long)ioaddr,
+#endif
+		    dev->dev_addr, pdev->irq);
+
+	pci_set_drvdata(pdev, dev);
+
+	{
+		u16 mii_cmd;
+		int mii_status = mdio_read(dev, phy_id, 1);
+		mii_cmd = mdio_read(dev, phy_id, MII_BMCR) & ~BMCR_ISOLATE;
+		mdio_write(dev, phy_id, MII_BMCR, mii_cmd);
+		if (mii_status != 0xffff && mii_status != 0x0000) {
+			rp->mii_if.advertising = mdio_read(dev, phy_id, 4);
+			netdev_info(dev,
+				    "MII PHY found at address %d, status 0x%04x advertising %04x Link %04x\n",
+				    phy_id,
+				    mii_status, rp->mii_if.advertising,
+				    mdio_read(dev, phy_id, 5));
+
+			/* set IFF_RUNNING */
+			if (mii_status & BMSR_LSTATUS)
+				netif_carrier_on(dev);
+			else
+				netif_carrier_off(dev);
+
+		}
+	}
+	rp->mii_if.phy_id = phy_id;
+	if (debug > 1 && avoid_D3)
+		netdev_info(dev, "No D3 power state at shutdown\n");
+
+	return 0;
+
+err_out_unmap:
+	pci_iounmap(pdev, ioaddr);
+err_out_free_res:
+	pci_release_regions(pdev);
+err_out_free_netdev:
+	free_netdev(dev);
+err_out:
+	return rc;
+}
+
+static int alloc_ring(struct net_device* dev)
+{
+	struct rhine_private *rp = netdev_priv(dev);
+	void *ring;
+	dma_addr_t ring_dma;
+
+	ring = pci_alloc_consistent(rp->pdev,
+				    RX_RING_SIZE * sizeof(struct rx_desc) +
+				    TX_RING_SIZE * sizeof(struct tx_desc),
+				    &ring_dma);
+	if (!ring) {
+		netdev_err(dev, "Could not allocate DMA memory\n");
+		return -ENOMEM;
+	}
+	if (rp->quirks & rqRhineI) {
+		rp->tx_bufs = pci_alloc_consistent(rp->pdev,
+						   PKT_BUF_SZ * TX_RING_SIZE,
+						   &rp->tx_bufs_dma);
+		if (rp->tx_bufs == NULL) {
+			pci_free_consistent(rp->pdev,
+				    RX_RING_SIZE * sizeof(struct rx_desc) +
+				    TX_RING_SIZE * sizeof(struct tx_desc),
+				    ring, ring_dma);
+			return -ENOMEM;
+		}
+	}
+
+	rp->rx_ring = ring;
+	rp->tx_ring = ring + RX_RING_SIZE * sizeof(struct rx_desc);
+	rp->rx_ring_dma = ring_dma;
+	rp->tx_ring_dma = ring_dma + RX_RING_SIZE * sizeof(struct rx_desc);
+
+	return 0;
+}
+
+static void free_ring(struct net_device* dev)
+{
+	struct rhine_private *rp = netdev_priv(dev);
+
+	pci_free_consistent(rp->pdev,
+			    RX_RING_SIZE * sizeof(struct rx_desc) +
+			    TX_RING_SIZE * sizeof(struct tx_desc),
+			    rp->rx_ring, rp->rx_ring_dma);
+	rp->tx_ring = NULL;
+
+	if (rp->tx_bufs)
author	Jeff Kirsher <jeffrey.t.kirsher@intel.com>	2011-05-20 20:43:09 -0700
committer	Jeff Kirsher <jeffrey.t.kirsher@intel.com>	2011-08-12 00:21:56 -0700
commit	f2148a472883ddf77626fff52b070655a8a0a788 (patch)
tree	4224e4b1f7b7bbec8a5c5ebbd2ed1e2a69a89b9a /drivers/net/ethernet/via
parent	527a626601de6ff89859de90883cc546892bf3ca (diff)