/*
8139 too . c : A RealTek RTL - 8139 Fast Ethernet driver for Linux .
Maintained by Jeff Garzik < jgarzik @ pobox . com >
Copyright 2000 - 2002 Jeff Garzik
Much code comes from Donald Becker ' s rtl8139 . c driver ,
versions 1 . 13 and older . This driver was originally based
on rtl8139 . c version 1 . 07 . Header of rtl8139 . c version 1 . 13 :
- - - - - < snip > - - - - -
Written 1997 - 2001 by Donald Becker .
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 for boards based on the RTL8129 and RTL8139
PCI ethernet chips .
The author may be reached as becker @ scyld . com , or C / O Scyld
Computing Corporation 410 Severn Ave . , Suite 210 Annapolis
MD 21403
Support and updates available at
http : //www.scyld.com/network/rtl8139.html
Twister - tuning table provided by Kinston
< shangh @ realtek . com . tw > .
- - - - - < snip > - - - - -
This software may be used and distributed according to the terms
of the GNU General Public License , incorporated herein by reference .
Contributors :
Donald Becker - he wrote the original driver , kudos to him !
( but please don ' t e - mail him for support , this isn ' t his driver )
Tigran Aivazian - bug fixes , skbuff free cleanup
Martin Mares - suggestions for PCI cleanup
David S . Miller - PCI DMA and softnet updates
Ernst Gill - fixes ported from BSD driver
Daniel Kobras - identified specific locations of
posted MMIO write bugginess
Gerard Sharp - bug fix , testing and feedback
David Ford - Rx ring wrap fix
Dan DeMaggio - swapped RTL8139 cards with me , and allowed me
to find and fix a crucial bug on older chipsets .
Donald Becker / Chris Butterworth / Marcus Westergren -
Noticed various Rx packet size - related buglets .
Santiago Garcia Mantinan - testing and feedback
Jens David - 2 . 2 . x kernel backports
Martin Dennett - incredibly helpful insight on undocumented
features of the 8139 chips
Jean - Jacques Michel - bug fix
Tobias Ringstr ö m - Rx interrupt status checking suggestion
Andrew Morton - Clear blocked signals , avoid
buffer overrun setting current - > comm .
Kalle Olavi Niemitalo - Wake - on - LAN ioctls
Robert Kuebel - Save kernel thread from dying on any signal .
Submitting bug reports :
" rtl8139 - diag - mmmaaavvveefN " output
enable RTL8139_DEBUG below , and look at ' dmesg ' or kernel log
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#define DRV_NAME "8139too"
#define DRV_VERSION "0.9.28"
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/compiler.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/rtnetlink.h>
#include <linux/delay.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/completion.h>
#include <linux/crc32.h>
#include <linux/io.h>
#include <linux/uaccess.h>
#include <linux/gfp.h>
#include <linux/if_vlan.h>
#include <asm /irq.h>
#define RTL8139_DRIVER_NAME DRV_NAME " Fast Ethernet driver " DRV_VERSION
/* Default Message level */
#define RTL8139_DEF_MSG_ENABLE (NETIF_MSG_DRV | \
NETIF_MSG_PROBE | \
NETIF_MSG_LINK)
/* define to 1, 2 or 3 to enable copious debugging info */
#define RTL8139_DEBUG 0
/* define to 1 to disable lightweight runtime debugging checks */
#undef RTL8139_NDEBUG
#ifdef RTL8139_NDEBUG
# define assert(expr) do {} while (0 )
#else
# define assert(expr) \
if (unlikely(!(expr))) { \
pr_err("Assertion failed! %s,%s,%s,line=%d\n" , \
#expr , __FILE__, __func__, __LINE__); \
}
#endif
/* A few user-configurable values. */
/* media options */
#define MAX_UNITS 8
static int media[MAX_UNITS] = {-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 };
static int full_duplex[MAX_UNITS] = {-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 };
/* Whether to use MMIO or PIO. Default to MMIO. */
#ifdef CONFIG_8139TOO_PIO
static bool use_io = true ;
#else
static bool use_io = false ;
#endif
/* Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
The RTL chips use a 64 element hash table based on the Ethernet CRC. */
static int multicast_filter_limit = 32 ;
/* bitmapped message enable number */
static int debug = -1 ;
/*
* Receive ring size
* Warning : 64 K ring has hardware issues and may lock up .
*/
#if defined (CONFIG_SH_DREAMCAST)
#define RX_BUF_IDX 0 /* 8K ring */
#else
#define RX_BUF_IDX 2 /* 32K ring */
#endif
#define RX_BUF_LEN (8192 << RX_BUF_IDX)
#define RX_BUF_PAD 16
#define RX_BUF_WRAP_PAD 2048 /* spare padding to handle lack of packet wrap */
#if RX_BUF_LEN == 65536
#define RX_BUF_TOT_LEN RX_BUF_LEN
#else
#define RX_BUF_TOT_LEN (RX_BUF_LEN + RX_BUF_PAD + RX_BUF_WRAP_PAD)
#endif
/* Number of Tx descriptor registers. */
#define NUM_TX_DESC 4
/* max supported ethernet frame size -- must be at least (dev->mtu+18+4).*/
#define MAX_ETH_FRAME_SIZE 1792
/* max supported payload size */
#define MAX_ETH_DATA_SIZE (MAX_ETH_FRAME_SIZE - VLAN_ETH_HLEN - ETH_FCS_LEN)
/* Size of the Tx bounce buffers -- must be at least (dev->mtu+18+4). */
#define TX_BUF_SIZE MAX_ETH_FRAME_SIZE
#define TX_BUF_TOT_LEN (TX_BUF_SIZE * NUM_TX_DESC)
/* PCI Tuning Parameters
Threshold is bytes transferred to chip before transmission starts. */
#define TX_FIFO_THRESH 256 /* In bytes, rounded down to 32 byte units. */
/* The following settings are log_2(bytes)-4: 0 == 16 bytes .. 6==1024, 7==end of packet. */
#define RX_FIFO_THRESH 7 /* Rx buffer level before first PCI xfer. */
#define RX_DMA_BURST 7 /* Maximum PCI burst, '6' is 1024 */
#define TX_DMA_BURST 6 /* Maximum PCI burst, '6' is 1024 */
#define TX_RETRY 8 /* 0-15. retries = 16 + (TX_RETRY * 16) */
/* Operational parameters that usually are not changed. */
/* Time in jiffies before concluding the transmitter is hung. */
#define TX_TIMEOUT (6 *HZ)
enum {
HAS_MII_XCVR = 0 x010000,
HAS_CHIP_XCVR = 0 x020000,
HAS_LNK_CHNG = 0 x040000,
};
#define RTL_NUM_STATS 4 /* number of ETHTOOL_GSTATS u64's */
#define RTL_REGS_VER 1 /* version of reg. data in ETHTOOL_GREGS */
#define RTL_MIN_IO_SIZE 0 x80
#define RTL8139B_IO_SIZE 256
#define RTL8129_CAPS HAS_MII_XCVR
#define RTL8139_CAPS (HAS_CHIP_XCVR|HAS_LNK_CHNG)
typedef enum {
RTL8139 = 0 ,
RTL8129,
} board_t;
/* indexed by board_t, above */
static const struct {
const char *name;
u32 hw_flags;
} board_info[] = {
{ "RealTek RTL8139" , RTL8139_CAPS },
{ "RealTek RTL8129" , RTL8129_CAPS },
};
static const struct pci_device_id rtl8139_pci_tbl[] = {
{0 x10ec, 0 x8139, PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , RTL8139 },
{0 x10ec, 0 x8138, PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , RTL8139 },
{0 x1113, 0 x1211, PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , RTL8139 },
{0 x1500, 0 x1360, PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , RTL8139 },
{0 x4033, 0 x1360, PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , RTL8139 },
{0 x1186, 0 x1300, PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , RTL8139 },
{0 x1186, 0 x1340, PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , RTL8139 },
{0 x13d1, 0 xab06, PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , RTL8139 },
{0 x1259, 0 xa117, PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , RTL8139 },
{0 x1259, 0 xa11e, PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , RTL8139 },
{0 x14ea, 0 xab06, PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , RTL8139 },
{0 x14ea, 0 xab07, PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , RTL8139 },
{0 x11db, 0 x1234, PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , RTL8139 },
{0 x1432, 0 x9130, PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , RTL8139 },
{0 x02ac, 0 x1012, PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , RTL8139 },
{0 x018a, 0 x0106, PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , RTL8139 },
{0 x126c, 0 x1211, PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , RTL8139 },
{0 x1743, 0 x8139, PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , RTL8139 },
{0 x021b, 0 x8139, PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , RTL8139 },
{0 x16ec, 0 xab06, PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , RTL8139 },
#ifdef CONFIG_SH_SECUREEDGE5410
/* Bogus 8139 silicon reports 8129 without external PROM :-( */
{0 x10ec, 0 x8129, PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , RTL8139 },
#endif
#ifdef CONFIG_8139TOO_8129
{0 x10ec, 0 x8129, PCI_ANY_ID, PCI_ANY_ID, 0 , 0 , RTL8129 },
#endif
/* some crazy cards report invalid vendor ids like
* 0 x0001 here . The other ids are valid and constant ,
* so we simply don ' t match on the main vendor id .
*/
{PCI_ANY_ID, 0 x8139, 0 x10ec, 0 x8139, 0 , 0 , RTL8139 },
{PCI_ANY_ID, 0 x8139, 0 x1186, 0 x1300, 0 , 0 , RTL8139 },
{PCI_ANY_ID, 0 x8139, 0 x13d1, 0 xab06, 0 , 0 , RTL8139 },
{0 ,}
};
MODULE_DEVICE_TABLE (pci, rtl8139_pci_tbl);
static struct {
const char str[ETH_GSTRING_LEN];
} ethtool_stats_keys[] = {
{ "early_rx" },
{ "tx_buf_mapped" },
{ "tx_timeouts" },
{ "rx_lost_in_ring" },
};
/* The rest of these values should never change. */
/* Symbolic offsets to registers. */
enum RTL8139_registers {
MAC0 = 0 , /* Ethernet hardware address. */
MAR0 = 8 , /* Multicast filter. */
TxStatus0 = 0 x10, /* Transmit status (Four 32bit registers). */
TxAddr0 = 0 x20, /* Tx descriptors (also four 32bit). */
RxBuf = 0 x30,
ChipCmd = 0 x37,
RxBufPtr = 0 x38,
RxBufAddr = 0 x3A,
IntrMask = 0 x3C,
IntrStatus = 0 x3E,
TxConfig = 0 x40,
RxConfig = 0 x44,
Timer = 0 x48, /* A general-purpose counter. */
RxMissed = 0 x4C, /* 24 bits valid, write clears. */
Cfg9346 = 0 x50,
Config0 = 0 x51,
Config1 = 0 x52,
TimerInt = 0 x54,
MediaStatus = 0 x58,
Config3 = 0 x59,
Config4 = 0 x5A, /* absent on RTL-8139A */
HltClk = 0 x5B,
MultiIntr = 0 x5C,
TxSummary = 0 x60,
BasicModeCtrl = 0 x62,
BasicModeStatus = 0 x64,
NWayAdvert = 0 x66,
NWayLPAR = 0 x68,
NWayExpansion = 0 x6A,
/* Undocumented registers, but required for proper operation. */
FIFOTMS = 0 x70, /* FIFO Control and test. */
CSCR = 0 x74, /* Chip Status and Configuration Register. */
PARA78 = 0 x78,
FlashReg = 0 xD4, /* Communication with Flash ROM, four bytes. */
PARA7c = 0 x7c, /* Magic transceiver parameter register. */
Config5 = 0 xD8, /* absent on RTL-8139A */
};
enum ClearBitMasks {
MultiIntrClear = 0 xF000,
ChipCmdClear = 0 xE2,
Config1Clear = (1 <<7 )|(1 <<6 )|(1 <<3 )|(1 <<2 )|(1 <<1 ),
};
enum ChipCmdBits {
CmdReset = 0 x10,
CmdRxEnb = 0 x08,
CmdTxEnb = 0 x04,
RxBufEmpty = 0 x01,
};
/* Interrupt register bits, using my own meaningful names. */
enum IntrStatusBits {
PCIErr = 0 x8000,
PCSTimeout = 0 x4000,
RxFIFOOver = 0 x40,
RxUnderrun = 0 x20,
RxOverflow = 0 x10,
TxErr = 0 x08,
TxOK = 0 x04,
RxErr = 0 x02,
RxOK = 0 x01,
RxAckBits = RxFIFOOver | RxOverflow | RxOK,
};
enum TxStatusBits {
TxHostOwns = 0 x2000,
TxUnderrun = 0 x4000,
TxStatOK = 0 x8000,
TxOutOfWindow = 0 x20000000,
TxAborted = 0 x40000000,
TxCarrierLost = 0 x80000000,
};
enum RxStatusBits {
RxMulticast = 0 x8000,
RxPhysical = 0 x4000,
RxBroadcast = 0 x2000,
RxBadSymbol = 0 x0020,
RxRunt = 0 x0010,
RxTooLong = 0 x0008,
RxCRCErr = 0 x0004,
RxBadAlign = 0 x0002,
RxStatusOK = 0 x0001,
};
/* Bits in RxConfig. */
enum rx_mode_bits {
AcceptErr = 0 x20,
AcceptRunt = 0 x10,
AcceptBroadcast = 0 x08,
AcceptMulticast = 0 x04,
AcceptMyPhys = 0 x02,
AcceptAllPhys = 0 x01,
};
/* Bits in TxConfig. */
enum tx_config_bits {
/* Interframe Gap Time. Only TxIFG96 doesn't violate IEEE 802.3 */
TxIFGShift = 24 ,
TxIFG84 = (0 << TxIFGShift), /* 8.4us / 840ns (10 / 100Mbps) */
TxIFG88 = (1 << TxIFGShift), /* 8.8us / 880ns (10 / 100Mbps) */
TxIFG92 = (2 << TxIFGShift), /* 9.2us / 920ns (10 / 100Mbps) */
TxIFG96 = (3 << TxIFGShift), /* 9.6us / 960ns (10 / 100Mbps) */
TxLoopBack = (1 << 18 ) | (1 << 17 ), /* enable loopback test mode */
TxCRC = (1 << 16 ), /* DISABLE Tx pkt CRC append */
TxClearAbt = (1 << 0 ), /* Clear abort (WO) */
TxDMAShift = 8 , /* DMA burst value (0-7) is shifted X many bits */
TxRetryShift = 4 , /* TXRR value (0-15) is shifted X many bits */
TxVersionMask = 0 x7C800000, /* mask out version bits 30-26, 23 */
};
/* Bits in Config1 */
enum Config1Bits {
Cfg1_PM_Enable = 0 x01,
Cfg1_VPD_Enable = 0 x02,
Cfg1_PIO = 0 x04,
Cfg1_MMIO = 0 x08,
LWAKE = 0 x10, /* not on 8139, 8139A */
Cfg1_Driver_Load = 0 x20,
Cfg1_LED0 = 0 x40,
Cfg1_LED1 = 0 x80,
SLEEP = (1 << 1 ), /* only on 8139, 8139A */
PWRDN = (1 << 0 ), /* only on 8139, 8139A */
};
/* Bits in Config3 */
enum Config3Bits {
Cfg3_FBtBEn = (1 << 0 ), /* 1 = Fast Back to Back */
Cfg3_FuncRegEn = (1 << 1 ), /* 1 = enable CardBus Function registers */
Cfg3_CLKRUN_En = (1 << 2 ), /* 1 = enable CLKRUN */
Cfg3_CardB_En = (1 << 3 ), /* 1 = enable CardBus registers */
Cfg3_LinkUp = (1 << 4 ), /* 1 = wake up on link up */
Cfg3_Magic = (1 << 5 ), /* 1 = wake up on Magic Packet (tm) */
Cfg3_PARM_En = (1 << 6 ), /* 0 = software can set twister parameters */
Cfg3_GNTSel = (1 << 7 ), /* 1 = delay 1 clock from PCI GNT signal */
};
/* Bits in Config4 */
enum Config4Bits {
LWPTN = (1 << 2 ), /* not on 8139, 8139A */
};
/* Bits in Config5 */
enum Config5Bits {
Cfg5_PME_STS = (1 << 0 ), /* 1 = PCI reset resets PME_Status */
Cfg5_LANWake = (1 << 1 ), /* 1 = enable LANWake signal */
Cfg5_LDPS = (1 << 2 ), /* 0 = save power when link is down */
Cfg5_FIFOAddrPtr= (1 << 3 ), /* Realtek internal SRAM testing */
Cfg5_UWF = (1 << 4 ), /* 1 = accept unicast wakeup frame */
Cfg5_MWF = (1 << 5 ), /* 1 = accept multicast wakeup frame */
Cfg5_BWF = (1 << 6 ), /* 1 = accept broadcast wakeup frame */
};
enum RxConfigBits {
/* rx fifo threshold */
RxCfgFIFOShift = 13 ,
RxCfgFIFONone = (7 << RxCfgFIFOShift),
/* Max DMA burst */
RxCfgDMAShift = 8 ,
RxCfgDMAUnlimited = (7 << RxCfgDMAShift),
/* rx ring buffer length */
RxCfgRcv8K = 0 ,
RxCfgRcv16K = (1 << 11 ),
RxCfgRcv32K = (1 << 12 ),
RxCfgRcv64K = (1 << 11 ) | (1 << 12 ),
/* Disable packet wrap at end of Rx buffer. (not possible with 64k) */
RxNoWrap = (1 << 7 ),
};
/* Twister tuning parameters from RealTek.
Completely undocumented, but required to tune bad links on some boards. */
enum CSCRBits {
CSCR_LinkOKBit = 0 x0400,
CSCR_LinkChangeBit = 0 x0800,
CSCR_LinkStatusBits = 0 x0f000,
CSCR_LinkDownOffCmd = 0 x003c0,
CSCR_LinkDownCmd = 0 x0f3c0,
};
enum Cfg9346Bits {
Cfg9346_Lock = 0 x00,
Cfg9346_Unlock = 0 xC0,
};
typedef enum {
CH_8139 = 0 ,
CH_8139_K,
CH_8139A,
CH_8139A_G,
CH_8139B,
CH_8130,
CH_8139C,
CH_8100,
CH_8100B_8139D,
CH_8101,
} chip_t;
enum chip_flags {
HasHltClk = (1 << 0 ),
HasLWake = (1 << 1 ),
};
#define HW_REVID(b30, b29, b28, b27, b26, b23, b22) \
(b30<<30 | b29<<29 | b28<<28 | b27<<27 | b26<<26 | b23<<23 | b22<<22 )
#define HW_REVID_MASK HW_REVID(1 , 1 , 1 , 1 , 1 , 1 , 1 )
/* directly indexed by chip_t, above */
static const struct {
const char *name;
u32 version; /* from RTL8139C/RTL8139D docs */
u32 flags;
} rtl_chip_info[] = {
{ "RTL-8139" ,
HW_REVID(1 , 0 , 0 , 0 , 0 , 0 , 0 ),
HasHltClk,
},
{ "RTL-8139 rev K" ,
HW_REVID(1 , 1 , 0 , 0 , 0 , 0 , 0 ),
HasHltClk,
},
{ "RTL-8139A" ,
HW_REVID(1 , 1 , 1 , 0 , 0 , 0 , 0 ),
HasHltClk, /* XXX undocumented? */
},
{ "RTL-8139A rev G" ,
HW_REVID(1 , 1 , 1 , 0 , 0 , 1 , 0 ),
HasHltClk, /* XXX undocumented? */
},
{ "RTL-8139B" ,
HW_REVID(1 , 1 , 1 , 1 , 0 , 0 , 0 ),
HasLWake,
},
{ "RTL-8130" ,
HW_REVID(1 , 1 , 1 , 1 , 1 , 0 , 0 ),
HasLWake,
},
{ "RTL-8139C" ,
HW_REVID(1 , 1 , 1 , 0 , 1 , 0 , 0 ),
HasLWake,
},
{ "RTL-8100" ,
HW_REVID(1 , 1 , 1 , 1 , 0 , 1 , 0 ),
HasLWake,
},
{ "RTL-8100B/8139D" ,
HW_REVID(1 , 1 , 1 , 0 , 1 , 0 , 1 ),
HasHltClk /* XXX undocumented? */
| HasLWake,
},
{ "RTL-8101" ,
HW_REVID(1 , 1 , 1 , 0 , 1 , 1 , 1 ),
HasLWake,
},
};
struct rtl_extra_stats {
unsigned long early_rx;
unsigned long tx_buf_mapped;
unsigned long tx_timeouts;
unsigned long rx_lost_in_ring;
};
struct rtl8139_stats {
u64 packets;
u64 bytes;
struct u64_stats_sync syncp;
};
struct rtl8139_private {
void __iomem *mmio_addr;
int drv_flags;
struct pci_dev *pci_dev;
u32 msg_enable;
struct napi_struct napi;
struct net_device *dev;
unsigned char *rx_ring;
unsigned int cur_rx; /* RX buf index of next pkt */
struct rtl8139_stats rx_stats;
dma_addr_t rx_ring_dma;
unsigned int tx_flag;
unsigned long cur_tx;
unsigned long dirty_tx;
struct rtl8139_stats tx_stats;
unsigned char *tx_buf[NUM_TX_DESC]; /* Tx bounce buffers */
unsigned char *tx_bufs; /* Tx bounce buffer region. */
dma_addr_t tx_bufs_dma;
signed char phys[4 ]; /* MII device addresses. */
/* Twister tune state. */
char twistie, twist_row, twist_col;
unsigned int watchdog_fired : 1 ;
unsigned int default_port : 4 ; /* Last dev->if_port value. */
unsigned int have_thread : 1 ;
spinlock_t lock;
spinlock_t rx_lock;
chip_t chipset;
u32 rx_config;
struct rtl_extra_stats xstats;
struct delayed_work thread;
struct mii_if_info mii;
unsigned int regs_len;
unsigned long fifo_copy_timeout;
};
MODULE_AUTHOR ("Jeff Garzik <jgarzik@pobox.com>" );
MODULE_DESCRIPTION ("RealTek RTL-8139 Fast Ethernet driver" );
MODULE_LICENSE("GPL" );
MODULE_VERSION(DRV_VERSION);
module_param(use_io, bool , 0 );
MODULE_PARM_DESC(use_io, "Force use of I/O access mode. 0=MMIO 1=PIO" );
module_param(multicast_filter_limit, int , 0 );
module_param_array(media, int , NULL, 0 );
module_param_array(full_duplex, int , NULL, 0 );
module_param(debug, int , 0 );
MODULE_PARM_DESC (debug, "8139too bitmapped message enable number" );
MODULE_PARM_DESC (multicast_filter_limit, "8139too maximum number of filtered multicast addresses" );
MODULE_PARM_DESC (media, "8139too: Bits 4+9: force full duplex, bit 5: 100Mbps" );
MODULE_PARM_DESC (full_duplex, "8139too: Force full duplex for board(s) (1)" );
static int read_eeprom (void __iomem *ioaddr, int location, int addr_len);
static int rtl8139_open (struct net_device *dev);
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 val);
static void rtl8139_start_thread(struct rtl8139_private *tp);
static void rtl8139_tx_timeout (struct net_device *dev, unsigned int txqueue);
static void rtl8139_init_ring (struct net_device *dev);
static netdev_tx_t rtl8139_start_xmit (struct sk_buff *skb,
struct net_device *dev);
#ifdef CONFIG_NET_POLL_CONTROLLER
static void rtl8139_poll_controller(struct net_device *dev);
#endif
static int rtl8139_set_mac_address(struct net_device *dev, void *p);
static int rtl8139_poll(struct napi_struct *napi, int budget);
static irqreturn_t rtl8139_interrupt (int irq, void *dev_instance);
static int rtl8139_close (struct net_device *dev);
static int netdev_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
static void rtl8139_get_stats64(struct net_device *dev,
struct rtnl_link_stats64 *stats);
static void rtl8139_set_rx_mode (struct net_device *dev);
static void __set_rx_mode (struct net_device *dev);
static void rtl8139_hw_start (struct net_device *dev);
static void rtl8139_thread (struct work_struct *work);
static void rtl8139_tx_timeout_task(struct work_struct *work);
static const struct ethtool_ops rtl8139_ethtool_ops;
/* write MMIO register, with flush */
/* Flush avoids rtl8139 bug w/ posted MMIO writes */
#define RTL_W8_F(reg, val8) do { iowrite8 ((val8), ioaddr + (reg)); ioread8 (ioaddr + (reg)); } while (0 )
#define RTL_W16_F(reg, val16) do { iowrite16 ((val16), ioaddr + (reg)); ioread16 (ioaddr + (reg)); } while (0 )
#define RTL_W32_F(reg, val32) do { iowrite32 ((val32), ioaddr + (reg)); ioread32 (ioaddr + (reg)); } while (0 )
/* write MMIO register */
#define RTL_W8(reg, val8) iowrite8 ((val8), ioaddr + (reg))
#define RTL_W16(reg, val16) iowrite16 ((val16), ioaddr + (reg))
#define RTL_W32(reg, val32) iowrite32 ((val32), ioaddr + (reg))
/* read MMIO register */
#define RTL_R8(reg) ioread8 (ioaddr + (reg))
#define RTL_R16(reg) ioread16 (ioaddr + (reg))
#define RTL_R32(reg) ioread32 (ioaddr + (reg))
static const u16 rtl8139_intr_mask =
PCIErr | PCSTimeout | RxUnderrun | RxOverflow | RxFIFOOver |
TxErr | TxOK | RxErr | RxOK;
static const u16 rtl8139_norx_intr_mask =
PCIErr | PCSTimeout | RxUnderrun |
TxErr | TxOK | RxErr ;
#if RX_BUF_IDX == 0
static const unsigned int rtl8139_rx_config =
RxCfgRcv8K | RxNoWrap |
(RX_FIFO_THRESH << RxCfgFIFOShift) |
(RX_DMA_BURST << RxCfgDMAShift);
#elif RX_BUF_IDX == 1
static const unsigned int rtl8139_rx_config =
RxCfgRcv16K | RxNoWrap |
(RX_FIFO_THRESH << RxCfgFIFOShift) |
(RX_DMA_BURST << RxCfgDMAShift);
#elif RX_BUF_IDX == 2
static const unsigned int rtl8139_rx_config =
RxCfgRcv32K | RxNoWrap |
(RX_FIFO_THRESH << RxCfgFIFOShift) |
(RX_DMA_BURST << RxCfgDMAShift);
#elif RX_BUF_IDX == 3
static const unsigned int rtl8139_rx_config =
RxCfgRcv64K |
(RX_FIFO_THRESH << RxCfgFIFOShift) |
(RX_DMA_BURST << RxCfgDMAShift);
#else
#error "Invalid configuration for 8139_RXBUF_IDX"
#endif
static const unsigned int rtl8139_tx_config =
TxIFG96 | (TX_DMA_BURST << TxDMAShift) | (TX_RETRY << TxRetryShift);
static void __rtl8139_cleanup_dev (struct net_device *dev)
{
struct rtl8139_private *tp = netdev_priv(dev);
struct pci_dev *pdev;
assert (dev != NULL);
assert (tp->pci_dev != NULL);
pdev = tp->pci_dev;
if (tp->mmio_addr)
pci_iounmap (pdev, tp->mmio_addr);
/* it's ok to call this even if we have no regions to free */
pci_release_regions (pdev);
free_netdev(dev);
}
static void rtl8139_chip_reset (void __iomem *ioaddr)
{
int i;
/* Soft reset the chip. */
RTL_W8 (ChipCmd, CmdReset);
/* Check that the chip has finished the reset. */
for (i = 1000 ; i > 0 ; i--) {
barrier();
if ((RTL_R8 (ChipCmd) & CmdReset) == 0 )
break ;
udelay (10 );
}
}
static struct net_device *rtl8139_init_board(struct pci_dev *pdev)
{
struct device *d = &pdev->dev;
void __iomem *ioaddr;
struct net_device *dev;
struct rtl8139_private *tp;
u8 tmp8;
int rc, disable_dev_on_err = 0 ;
unsigned int i, bar;
unsigned long io_len;
u32 version;
static const struct {
unsigned long mask;
char *type;
} res[] = {
{ IORESOURCE_IO, "PIO" },
{ IORESOURCE_MEM, "MMIO" }
};
assert (pdev != NULL);
/* dev and priv zeroed in alloc_etherdev */
dev = alloc_etherdev (sizeof (*tp));
if (dev == NULL)
return ERR_PTR(-ENOMEM);
SET_NETDEV_DEV(dev, &pdev->dev);
tp = netdev_priv(dev);
tp->pci_dev = pdev;
/* enable device (incl. PCI PM wakeup and hotplug setup) */
rc = pci_enable_device (pdev);
if (rc)
goto err_out;
disable_dev_on_err = 1 ;
rc = pci_request_regions (pdev, DRV_NAME);
if (rc)
goto err_out;
pci_set_master (pdev);
u64_stats_init(&tp->rx_stats.syncp);
u64_stats_init(&tp->tx_stats.syncp);
retry:
/* PIO bar register comes first. */
bar = !use_io;
io_len = pci_resource_len(pdev, bar);
dev_dbg(d, "%s region size = 0x%02lX\n" , res[bar].type, io_len);
if (!(pci_resource_flags(pdev, bar) & res[bar].mask)) {
dev_err(d, "region #%d not a %s resource, aborting\n" , bar,
res[bar].type);
rc = -ENODEV;
goto err_out;
}
if (io_len < RTL_MIN_IO_SIZE) {
dev_err(d, "Invalid PCI %s region size(s), aborting\n" ,
res[bar].type);
rc = -ENODEV;
goto err_out;
}
ioaddr = pci_iomap(pdev, bar, 0 );
if (!ioaddr) {
dev_err(d, "cannot map %s\n" , res[bar].type);
if (!use_io) {
use_io = true ;
goto retry;
}
rc = -ENODEV;
goto err_out;
}
tp->regs_len = io_len;
tp->mmio_addr = ioaddr;
/* Bring old chips out of low-power mode. */
RTL_W8 (HltClk, 'R' );
/* check for missing/broken hardware */
if (RTL_R32 (TxConfig) == 0 xFFFFFFFF) {
dev_err(&pdev->dev, "Chip not responding, ignoring board\n" );
rc = -EIO;
goto err_out;
}
/* identify chip attached to board */
version = RTL_R32 (TxConfig) & HW_REVID_MASK;
for (i = 0 ; i < ARRAY_SIZE (rtl_chip_info); i++)
if (version == rtl_chip_info[i].version) {
tp->chipset = i;
goto match;
}
/* if unknown chip, assume array element #0, original RTL-8139 in this case */
i = 0 ;
dev_dbg(&pdev->dev, "unknown chip version, assuming RTL-8139\n" );
dev_dbg(&pdev->dev, "TxConfig = 0x%x\n" , RTL_R32 (TxConfig));
tp->chipset = 0 ;
match:
pr_debug("chipset id (%d) == index %d, '%s'\n" ,
version, i, rtl_chip_info[i].name);
if (tp->chipset >= CH_8139B) {
u8 new_tmp8 = tmp8 = RTL_R8 (Config1);
pr_debug("PCI PM wakeup\n" );
if ((rtl_chip_info[tp->chipset].flags & HasLWake) &&
(tmp8 & LWAKE))
new_tmp8 &= ~LWAKE;
new_tmp8 |= Cfg1_PM_Enable;
if (new_tmp8 != tmp8) {
RTL_W8 (Cfg9346, Cfg9346_Unlock);
RTL_W8 (Config1, tmp8);
RTL_W8 (Cfg9346, Cfg9346_Lock);
}
if (rtl_chip_info[tp->chipset].flags & HasLWake) {
tmp8 = RTL_R8 (Config4);
if (tmp8 & LWPTN) {
RTL_W8 (Cfg9346, Cfg9346_Unlock);
RTL_W8 (Config4, tmp8 & ~LWPTN);
RTL_W8 (Cfg9346, Cfg9346_Lock);
}
}
} else {
pr_debug("Old chip wakeup\n" );
tmp8 = RTL_R8 (Config1);
tmp8 &= ~(SLEEP | PWRDN);
RTL_W8 (Config1, tmp8);
}
rtl8139_chip_reset (ioaddr);
return dev;
err_out:
__rtl8139_cleanup_dev (dev);
if (disable_dev_on_err)
pci_disable_device (pdev);
return ERR_PTR(rc);
}
static int rtl8139_set_features(struct net_device *dev, netdev_features_t features)
{
struct rtl8139_private *tp = netdev_priv(dev);
unsigned long flags;
netdev_features_t changed = features ^ dev->features;
void __iomem *ioaddr = tp->mmio_addr;
if (!(changed & (NETIF_F_RXALL)))
return 0 ;
spin_lock_irqsave(&tp->lock, flags);
if (changed & NETIF_F_RXALL) {
int rx_mode = tp->rx_config;
if (features & NETIF_F_RXALL)
rx_mode |= (AcceptErr | AcceptRunt);
else
rx_mode &= ~(AcceptErr | AcceptRunt);
tp->rx_config = rtl8139_rx_config | rx_mode;
RTL_W32_F(RxConfig, tp->rx_config);
}
spin_unlock_irqrestore(&tp->lock, flags);
return 0 ;
}
static const struct net_device_ops rtl8139_netdev_ops = {
.ndo_open = rtl8139_open,
.ndo_stop = rtl8139_close,
.ndo_get_stats64 = rtl8139_get_stats64,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = rtl8139_set_mac_address,
.ndo_start_xmit = rtl8139_start_xmit,
.ndo_set_rx_mode = rtl8139_set_rx_mode,
.ndo_eth_ioctl = netdev_ioctl,
.ndo_tx_timeout = rtl8139_tx_timeout,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = rtl8139_poll_controller,
#endif
.ndo_set_features = rtl8139_set_features,
};
static int rtl8139_init_one(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct net_device *dev = NULL;
struct rtl8139_private *tp;
__le16 addr[ETH_ALEN / 2 ];
int i, addr_len, option;
void __iomem *ioaddr;
static int board_idx = -1 ;
assert (pdev != NULL);
assert (ent != NULL);
board_idx++;
/* when we're built into the kernel, the driver version message
* is only printed if at least one 8139 board has been found
*/
#ifndef MODULE
{
static int printed_version;
if (!printed_version++)
pr_info(RTL8139_DRIVER_NAME "\n" );
}
#endif
if (pdev->vendor == PCI_VENDOR_ID_REALTEK &&
pdev->device == PCI_DEVICE_ID_REALTEK_8139 && pdev->revision >= 0 x20) {
dev_info(&pdev->dev,
"This (id %04x:%04x rev %02x) is an enhanced 8139C+ chip, use 8139cp\n" ,
pdev->vendor, pdev->device, pdev->revision);
return -ENODEV;
}
if (pdev->vendor == PCI_VENDOR_ID_REALTEK &&
pdev->device == PCI_DEVICE_ID_REALTEK_8139 &&
pdev->subsystem_vendor == PCI_VENDOR_ID_ATHEROS &&
pdev->subsystem_device == PCI_DEVICE_ID_REALTEK_8139) {
pr_info("OQO Model 2 detected. Forcing PIO\n" );
use_io = true ;
}
dev = rtl8139_init_board (pdev);
if (IS_ERR(dev))
return PTR_ERR(dev);
assert (dev != NULL);
tp = netdev_priv(dev);
tp->dev = dev;
ioaddr = tp->mmio_addr;
assert (ioaddr != NULL);
addr_len = read_eeprom (ioaddr, 0 , 8 ) == 0 x8129 ? 8 : 6 ;
for (i = 0 ; i < 3 ; i++)
addr[i] = cpu_to_le16(read_eeprom (ioaddr, i + 7 , addr_len));
eth_hw_addr_set(dev, (u8 *)addr);
/* The Rtl8139-specific entries in the device structure. */
dev->netdev_ops = &rtl8139_netdev_ops;
dev->ethtool_ops = &rtl8139_ethtool_ops;
dev->watchdog_timeo = TX_TIMEOUT;
netif_napi_add(dev, &tp->napi, rtl8139_poll);
/* note: the hardware is not capable of sg/csum/highdma, however
* through the use of skb_copy_and_csum_dev we enable these
* features
*/
dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA;
dev->vlan_features = dev->features;
dev->hw_features |= NETIF_F_RXALL;
dev->hw_features |= NETIF_F_RXFCS;
/* MTU range: 68 - 1770 */
dev->min_mtu = ETH_MIN_MTU;
dev->max_mtu = MAX_ETH_DATA_SIZE;
/* tp zeroed and aligned in alloc_etherdev */
tp = netdev_priv(dev);
/* note: tp->chipset set in rtl8139_init_board */
tp->drv_flags = board_info[ent->driver_data].hw_flags;
tp->mmio_addr = ioaddr;
tp->msg_enable =
(debug < 0 ? RTL8139_DEF_MSG_ENABLE : ((1 << debug) - 1 ));
spin_lock_init (&tp->lock);
spin_lock_init (&tp->rx_lock);
INIT_DELAYED_WORK(&tp->thread, rtl8139_thread);
tp->mii.dev = dev;
tp->mii.mdio_read = mdio_read;
tp->mii.mdio_write = mdio_write;
tp->mii.phy_id_mask = 0 x3f;
tp->mii.reg_num_mask = 0 x1f;
/* dev is fully set up and ready to use now */
pr_debug("about to register device named %s (%p)...\n" ,
dev->name, dev);
i = register_netdev (dev);
if (i) goto err_out;
pci_set_drvdata (pdev, dev);
netdev_info(dev, "%s at 0x%p, %pM, IRQ %d\n" ,
board_info[ent->driver_data].name,
ioaddr, dev->dev_addr, pdev->irq);
netdev_dbg(dev, "Identified 8139 chip type '%s'\n" ,
rtl_chip_info[tp->chipset].name);
/* Find the connected MII xcvrs.
Doing this in open ( ) would allow detecting external xcvrs later , but
takes too much time. */
#ifdef CONFIG_8139TOO_8129
if (tp->drv_flags & HAS_MII_XCVR) {
int phy, phy_idx = 0 ;
for (phy = 0 ; phy < 32 && phy_idx < sizeof (tp->phys); phy++) {
int mii_status = mdio_read(dev, phy, 1 );
if (mii_status != 0 xffff && mii_status != 0 x0000) {
u16 advertising = mdio_read(dev, phy, 4 );
tp->phys[phy_idx++] = phy;
netdev_info(dev, "MII transceiver %d status 0x%04x advertising %04x\n" ,
phy, mii_status, advertising);
}
}
if (phy_idx == 0 ) {
netdev_info(dev, "No MII transceivers found! Assuming SYM transceiver\n" );
tp->phys[0 ] = 32 ;
}
} else
#endif
tp->phys[0 ] = 32 ;
tp->mii.phy_id = tp->phys[0 ];
/* The lower four bits are the media type. */
option = (board_idx >= MAX_UNITS) ? 0 : media[board_idx];
if (option > 0 ) {
tp->mii.full_duplex = (option & 0 x210) ? 1 : 0 ;
tp->default_port = option & 0 xFF;
if (tp->default_port)
tp->mii.force_media = 1 ;
}
if (board_idx < MAX_UNITS && full_duplex[board_idx] > 0 )
tp->mii.full_duplex = full_duplex[board_idx];
if (tp->mii.full_duplex) {
netdev_info(dev, "Media type forced to Full Duplex\n" );
/* Changing the MII-advertised media because might prevent
re-connection. */
tp->mii.force_media = 1 ;
}
if (tp->default_port) {
netdev_info(dev, " Forcing %dMbps %s-duplex operation\n" ,
(option & 0 x20 ? 100 : 10 ),
(option & 0 x10 ? "full" : "half" ));
mdio_write(dev, tp->phys[0 ], 0 ,
((option & 0 x20) ? 0 x2000 : 0 ) | /* 100Mbps? */
((option & 0 x10) ? 0 x0100 : 0 )); /* Full duplex? */
}
/* Put the chip into low-power mode. */
if (rtl_chip_info[tp->chipset].flags & HasHltClk)
RTL_W8 (HltClk, 'H' ); /* 'R' would leave the clock running. */
return 0 ;
err_out:
__rtl8139_cleanup_dev (dev);
pci_disable_device (pdev);
return i;
}
static void rtl8139_remove_one(struct pci_dev *pdev)
{
struct net_device *dev = pci_get_drvdata (pdev);
struct rtl8139_private *tp = netdev_priv(dev);
assert (dev != NULL);
cancel_delayed_work_sync(&tp->thread);
unregister_netdev (dev);
__rtl8139_cleanup_dev (dev);
pci_disable_device (pdev);
}
/* Serial EEPROM section. */
/* EEPROM_Ctrl bits. */
#define EE_SHIFT_CLK 0 x04 /* EEPROM shift clock. */
#define EE_CS 0 x08 /* EEPROM chip select. */
#define EE_DATA_WRITE 0 x02 /* EEPROM chip data in. */
#define EE_WRITE_0 0 x00
#define EE_WRITE_1 0 x02
#define EE_DATA_READ 0 x01 /* EEPROM chip data out. */
#define EE_ENB (0 x80 | EE_CS)
/* Delay between EEPROM clock transitions.
No extra delay is needed with 33 Mhz PCI , but 66 Mhz may change this .
*/
#define eeprom_delay() (void )RTL_R8(Cfg9346)
/* The EEPROM commands include the alway-set leading bit. */
#define EE_WRITE_CMD (5 )
#define EE_READ_CMD (6 )
#define EE_ERASE_CMD (7 )
static int read_eeprom(void __iomem *ioaddr, int location, int addr_len)
{
int i;
unsigned retval = 0 ;
int read_cmd = location | (EE_READ_CMD << addr_len);
RTL_W8 (Cfg9346, EE_ENB & ~EE_CS);
RTL_W8 (Cfg9346, EE_ENB);
eeprom_delay ();
/* Shift the read command bits out. */
for (i = 4 + addr_len; i >= 0 ; i--) {
int dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0 ;
RTL_W8 (Cfg9346, EE_ENB | dataval);
eeprom_delay ();
RTL_W8 (Cfg9346, EE_ENB | dataval | EE_SHIFT_CLK);
eeprom_delay ();
}
RTL_W8 (Cfg9346, EE_ENB);
eeprom_delay ();
for (i = 16 ; i > 0 ; i--) {
RTL_W8 (Cfg9346, EE_ENB | EE_SHIFT_CLK);
eeprom_delay ();
retval =
(retval << 1 ) | ((RTL_R8 (Cfg9346) & EE_DATA_READ) ? 1 :
0 );
RTL_W8 (Cfg9346, EE_ENB);
eeprom_delay ();
}
/* Terminate the EEPROM access. */
RTL_W8(Cfg9346, 0 );
eeprom_delay ();
return retval;
}
/* MII serial management: mostly bogus for now. */
/* Read and write the MII management registers using software-generated
serial MDIO protocol .
The maximum data clock rate is 2 . 5 Mhz . The minimum timing is usually
met by back - to - back PCI I / O cycles , but we insert a delay to avoid
"overclocking" issues. */
#define MDIO_DIR 0 x80
#define MDIO_DATA_OUT 0 x04
#define MDIO_DATA_IN 0 x02
#define MDIO_CLK 0 x01
#define MDIO_WRITE0 (MDIO_DIR)
#define MDIO_WRITE1 (MDIO_DIR | MDIO_DATA_OUT)
#define mdio_delay() RTL_R8(Config4)
static const char mii_2_8139_map[8 ] = {
BasicModeCtrl,
BasicModeStatus,
0 ,
0 ,
NWayAdvert,
NWayLPAR,
NWayExpansion,
0
};
#ifdef CONFIG_8139TOO_8129
/* Syncronize the MII management interface by shifting 32 one bits out. */
static void mdio_sync (void __iomem *ioaddr)
{
int i;
for (i = 32 ; i >= 0 ; i--) {
RTL_W8 (Config4, MDIO_WRITE1);
mdio_delay ();
RTL_W8 (Config4, MDIO_WRITE1 | MDIO_CLK);
mdio_delay ();
}
}
#endif
static int mdio_read (struct net_device *dev, int phy_id, int location)
{
struct rtl8139_private *tp = netdev_priv(dev);
int retval = 0 ;
#ifdef CONFIG_8139TOO_8129
void __iomem *ioaddr = tp->mmio_addr;
int mii_cmd = (0 xf6 << 10 ) | (phy_id << 5 ) | location;
int i;
#endif
if (phy_id > 31 ) { /* Really a 8139. Use internal registers. */
void __iomem *ioaddr = tp->mmio_addr;
return location < 8 && mii_2_8139_map[location] ?
RTL_R16 (mii_2_8139_map[location]) : 0 ;
}
#ifdef CONFIG_8139TOO_8129
mdio_sync (ioaddr);
/* Shift the read command bits out. */
for (i = 15 ; i >= 0 ; i--) {
int dataval = (mii_cmd & (1 << i)) ? MDIO_DATA_OUT : 0 ;
RTL_W8 (Config4, MDIO_DIR | dataval);
mdio_delay ();
RTL_W8 (Config4, MDIO_DIR | dataval | MDIO_CLK);
mdio_delay ();
}
/* Read the two transition, 16 data, and wire-idle bits. */
for (i = 19 ; i > 0 ; i--) {
RTL_W8 (Config4, 0 );
mdio_delay ();
retval = (retval << 1 ) | ((RTL_R8 (Config4) & MDIO_DATA_IN) ? 1 : 0 );
RTL_W8 (Config4, MDIO_CLK);
mdio_delay ();
}
#endif
return (retval >> 1 ) & 0 xffff;
}
static void mdio_write (struct net_device *dev, int phy_id, int location,
int value)
{
struct rtl8139_private *tp = netdev_priv(dev);
#ifdef CONFIG_8139TOO_8129
void __iomem *ioaddr = tp->mmio_addr;
int mii_cmd = (0 x5002 << 16 ) | (phy_id << 23 ) | (location << 18 ) | value;
int i;
#endif
if (phy_id > 31 ) { /* Really a 8139. Use internal registers. */
void __iomem *ioaddr = tp->mmio_addr;
if (location == 0 ) {
RTL_W8 (Cfg9346, Cfg9346_Unlock);
RTL_W16 (BasicModeCtrl, value);
RTL_W8 (Cfg9346, Cfg9346_Lock);
} else if (location < 8 && mii_2_8139_map[location])
RTL_W16 (mii_2_8139_map[location], value);
return ;
}
#ifdef CONFIG_8139TOO_8129
mdio_sync (ioaddr);
/* Shift the command bits out. */
for (i = 31 ; i >= 0 ; i--) {
int dataval =
(mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
RTL_W8 (Config4, dataval);
mdio_delay ();
RTL_W8 (Config4, dataval | MDIO_CLK);
mdio_delay ();
}
/* Clear out extra bits. */
for (i = 2 ; i > 0 ; i--) {
RTL_W8 (Config4, 0 );
mdio_delay ();
RTL_W8 (Config4, MDIO_CLK);
mdio_delay ();
}
#endif
}
static int rtl8139_open (struct net_device *dev)
{
struct rtl8139_private *tp = netdev_priv(dev);
void __iomem *ioaddr = tp->mmio_addr;
const int irq = tp->pci_dev->irq;
int retval;
retval = request_irq(irq, rtl8139_interrupt, IRQF_SHARED, dev->name, dev);
if (retval)
return retval;
tp->tx_bufs = dma_alloc_coherent(&tp->pci_dev->dev, TX_BUF_TOT_LEN,
&tp->tx_bufs_dma, GFP_KERNEL);
tp->rx_ring = dma_alloc_coherent(&tp->pci_dev->dev, RX_BUF_TOT_LEN,
&tp->rx_ring_dma, GFP_KERNEL);
if (tp->tx_bufs == NULL || tp->rx_ring == NULL) {
free_irq(irq, dev);
if (tp->tx_bufs)
dma_free_coherent(&tp->pci_dev->dev, TX_BUF_TOT_LEN,
tp->tx_bufs, tp->tx_bufs_dma);
if (tp->rx_ring)
dma_free_coherent(&tp->pci_dev->dev, RX_BUF_TOT_LEN,
tp->rx_ring, tp->rx_ring_dma);
return -ENOMEM;
}
napi_enable(&tp->napi);
tp->mii.full_duplex = tp->mii.force_media;
tp->tx_flag = (TX_FIFO_THRESH << 11 ) & 0 x003f0000;
rtl8139_init_ring (dev);
rtl8139_hw_start (dev);
netif_start_queue (dev);
netif_dbg(tp, ifup, dev,
"%s() ioaddr %#llx IRQ %d GP Pins %02x %s-duplex\n" ,
__func__,
(unsigned long long )pci_resource_start (tp->pci_dev, 1 ),
irq, RTL_R8 (MediaStatus),
tp->mii.full_duplex ? "full" : "half" );
rtl8139_start_thread(tp);
return 0 ;
}
static void rtl_check_media (struct net_device *dev, unsigned int init_media)
{
struct rtl8139_private *tp = netdev_priv(dev);
if (tp->phys[0 ] >= 0 ) {
mii_check_media(&tp->mii, netif_msg_link(tp), init_media);
}
}
/* Start the hardware at open or resume. */
static void rtl8139_hw_start (struct net_device *dev)
{
struct rtl8139_private *tp = netdev_priv(dev);
void __iomem *ioaddr = tp->mmio_addr;
u32 i;
u8 tmp;
/* Bring old chips out of low-power mode. */
if (rtl_chip_info[tp->chipset].flags & HasHltClk)
RTL_W8 (HltClk, 'R' );
rtl8139_chip_reset (ioaddr);
/* unlock Config[01234] and BMCR register writes */
RTL_W8_F (Cfg9346, Cfg9346_Unlock);
/* Restore our idea of the MAC address. */
RTL_W32_F (MAC0 + 0 , le32_to_cpu (*(__le32 *) (dev->dev_addr + 0 )));
RTL_W32_F (MAC0 + 4 , le16_to_cpu (*(__le16 *) (dev->dev_addr + 4 )));
tp->cur_rx = 0 ;
/* init Rx ring buffer DMA address */
RTL_W32_F (RxBuf, tp->rx_ring_dma);
/* Must enable Tx/Rx before setting transfer thresholds! */
RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
tp->rx_config = rtl8139_rx_config | AcceptBroadcast | AcceptMyPhys;
RTL_W32 (RxConfig, tp->rx_config);
RTL_W32 (TxConfig, rtl8139_tx_config);
rtl_check_media (dev, 1 );
if (tp->chipset >= CH_8139B) {
/* Disable magic packet scanning, which is enabled
* when PM is enabled in Config1 . It can be reenabled
* via ETHTOOL_SWOL if desired. */
RTL_W8 (Config3, RTL_R8 (Config3) & ~Cfg3_Magic);
}
netdev_dbg(dev, "init buffer addresses\n" );
/* Lock Config[01234] and BMCR register writes */
RTL_W8 (Cfg9346, Cfg9346_Lock);
/* init Tx buffer DMA addresses */
for (i = 0 ; i < NUM_TX_DESC; i++)
RTL_W32_F (TxAddr0 + (i * 4 ), tp->tx_bufs_dma + (tp->tx_buf[i] - tp->tx_bufs));
RTL_W32 (RxMissed, 0 );
rtl8139_set_rx_mode (dev);
/* no early-rx interrupts */
RTL_W16 (MultiIntr, RTL_R16 (MultiIntr) & MultiIntrClear);
/* make sure RxTx has started */
tmp = RTL_R8 (ChipCmd);
if ((!(tmp & CmdRxEnb)) || (!(tmp & CmdTxEnb)))
RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
/* Enable all known interrupts by setting the interrupt mask. */
RTL_W16 (IntrMask, rtl8139_intr_mask);
}
/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
static void rtl8139_init_ring (struct net_device *dev)
{
struct rtl8139_private *tp = netdev_priv(dev);
int i;
tp->cur_rx = 0 ;
tp->cur_tx = 0 ;
tp->dirty_tx = 0 ;
for (i = 0 ; i < NUM_TX_DESC; i++)
tp->tx_buf[i] = &tp->tx_bufs[i * TX_BUF_SIZE];
}
/* This must be global for CONFIG_8139TOO_TUNE_TWISTER case */
static int next_tick = 3 * HZ;
#ifndef CONFIG_8139TOO_TUNE_TWISTER
static inline void rtl8139_tune_twister (struct net_device *dev,
struct rtl8139_private *tp) {}
#else
enum TwisterParamVals {
PARA78_default = 0 x78fa8388,
PARA7c_default = 0 xcb38de43, /* param[0][3] */
PARA7c_xxx = 0 xcb38de43,
};
static const unsigned long param[4 ][4 ] = {
{0 xcb39de43, 0 xcb39ce43, 0 xfb38de03, 0 xcb38de43},
{0 xcb39de43, 0 xcb39ce43, 0 xcb39ce83, 0 xcb39ce83},
{0 xcb39de43, 0 xcb39ce43, 0 xcb39ce83, 0 xcb39ce83},
{0 xbb39de43, 0 xbb39ce43, 0 xbb39ce83, 0 xbb39ce83}
};
static void rtl8139_tune_twister (struct net_device *dev,
struct rtl8139_private *tp)
{
int linkcase;
void __iomem *ioaddr = tp->mmio_addr;
/* This is a complicated state machine to configure the "twister" for
impedance / echos based on the cable length .
All of this is magic and undocumented .
*/
switch (tp->twistie) {
case 1 :
if (RTL_R16 (CSCR) & CSCR_LinkOKBit) {
/* We have link beat, let us tune the twister. */
RTL_W16 (CSCR, CSCR_LinkDownOffCmd);
tp->twistie = 2 ; /* Change to state 2. */
next_tick = HZ / 10 ;
} else {
/* Just put in some reasonable defaults for when beat returns. */
RTL_W16 (CSCR, CSCR_LinkDownCmd);
RTL_W32 (FIFOTMS, 0 x20); /* Turn on cable test mode. */
RTL_W32 (PARA78, PARA78_default);
RTL_W32 (PARA7c, PARA7c_default);
tp->twistie = 0 ; /* Bail from future actions. */
}
break ;
case 2 :
/* Read how long it took to hear the echo. */
linkcase = RTL_R16 (CSCR) & CSCR_LinkStatusBits;
if (linkcase == 0 x7000)
tp->twist_row = 3 ;
else if (linkcase == 0 x3000)
tp->twist_row = 2 ;
else if (linkcase == 0 x1000)
tp->twist_row = 1 ;
else
tp->twist_row = 0 ;
tp->twist_col = 0 ;
tp->twistie = 3 ; /* Change to state 2. */
next_tick = HZ / 10 ;
break ;
case 3 :
/* Put out four tuning parameters, one per 100msec. */
if (tp->twist_col == 0 )
RTL_W16 (FIFOTMS, 0 );
RTL_W32 (PARA7c, param[(int ) tp->twist_row]
[(int ) tp->twist_col]);
next_tick = HZ / 10 ;
if (++tp->twist_col >= 4 ) {
/* For short cables we are done.
For long cables (row == 3) check for mistune. */
tp->twistie =
(tp->twist_row == 3 ) ? 4 : 0 ;
}
break ;
case 4 :
/* Special case for long cables: check for mistune. */
if ((RTL_R16 (CSCR) &
CSCR_LinkStatusBits) == 0 x7000) {
tp->twistie = 0 ;
break ;
} else {
RTL_W32 (PARA7c, 0 xfb38de03);
tp->twistie = 5 ;
next_tick = HZ / 10 ;
}
break ;
case 5 :
/* Retune for shorter cable (column 2). */
RTL_W32 (FIFOTMS, 0 x20);
RTL_W32 (PARA78, PARA78_default);
RTL_W32 (PARA7c, PARA7c_default);
RTL_W32 (FIFOTMS, 0 x00);
tp->twist_row = 2 ;
tp->twist_col = 0 ;
tp->twistie = 3 ;
next_tick = HZ / 10 ;
break ;
default :
/* do nothing */
break ;
}
}
#endif /* CONFIG_8139TOO_TUNE_TWISTER */
static inline void rtl8139_thread_iter (struct net_device *dev,
struct rtl8139_private *tp,
void __iomem *ioaddr)
{
int mii_lpa;
mii_lpa = mdio_read (dev, tp->phys[0 ], MII_LPA);
if (!tp->mii.force_media && mii_lpa != 0 xffff) {
int duplex = ((mii_lpa & LPA_100FULL) ||
(mii_lpa & 0 x01C0) == 0 x0040);
if (tp->mii.full_duplex != duplex) {
tp->mii.full_duplex = duplex;
if (mii_lpa) {
netdev_info(dev, "Setting %s-duplex based on MII #%d link partner ability of %04x\n" ,
tp->mii.full_duplex ? "full" : "half" ,
tp->phys[0 ], mii_lpa);
} else {
netdev_info(dev, "media is unconnected, link down, or incompatible connection\n" );
}
#if 0
RTL_W8 (Cfg9346, Cfg9346_Unlock);
RTL_W8 (Config1, tp->mii.full_duplex ? 0 x60 : 0 x20);
RTL_W8 (Cfg9346, Cfg9346_Lock);
#endif
}
}
next_tick = HZ * 60 ;
rtl8139_tune_twister (dev, tp);
netdev_dbg(dev, "Media selection tick, Link partner %04x\n" ,
RTL_R16(NWayLPAR));
netdev_dbg(dev, "Other registers are IntMask %04x IntStatus %04x\n" ,
RTL_R16(IntrMask), RTL_R16(IntrStatus));
netdev_dbg(dev, "Chip config %02x %02x\n" ,
RTL_R8(Config0), RTL_R8(Config1));
}
static void rtl8139_thread (struct work_struct *work)
{
struct rtl8139_private *tp =
container_of(work, struct rtl8139_private, thread.work);
struct net_device *dev = tp->mii.dev;
unsigned long thr_delay = next_tick;
rtnl_lock();
if (!netif_running(dev))
goto out_unlock;
if (tp->watchdog_fired) {
tp->watchdog_fired = 0 ;
rtl8139_tx_timeout_task(work);
} else
rtl8139_thread_iter(dev, tp, tp->mmio_addr);
if (tp->have_thread)
schedule_delayed_work(&tp->thread, thr_delay);
out_unlock:
rtnl_unlock ();
}
static void rtl8139_start_thread(struct rtl8139_private *tp)
{
tp->twistie = 0 ;
if (tp->chipset == CH_8139_K)
tp->twistie = 1 ;
else if (tp->drv_flags & HAS_LNK_CHNG)
return ;
tp->have_thread = 1 ;
tp->watchdog_fired = 0 ;
schedule_delayed_work(&tp->thread, next_tick);
}
static inline void rtl8139_tx_clear (struct rtl8139_private *tp)
{
tp->cur_tx = 0 ;
tp->dirty_tx = 0 ;
/* XXX account for unsent Tx packets in tp->stats.tx_dropped */
}
static void rtl8139_tx_timeout_task (struct work_struct *work)
{
struct rtl8139_private *tp =
container_of(work, struct rtl8139_private, thread.work);
struct net_device *dev = tp->mii.dev;
void __iomem *ioaddr = tp->mmio_addr;
int i;
u8 tmp8;
napi_disable(&tp->napi);
netif_stop_queue(dev);
synchronize_rcu();
netdev_dbg(dev, "Transmit timeout, status %02x %04x %04x media %02x\n" ,
RTL_R8(ChipCmd), RTL_R16(IntrStatus),
RTL_R16(IntrMask), RTL_R8(MediaStatus));
/* Emit info to figure out what went wrong. */
netdev_dbg(dev, "Tx queue start entry %ld dirty entry %ld\n" ,
tp->cur_tx, tp->dirty_tx);
for (i = 0 ; i < NUM_TX_DESC; i++)
netdev_dbg(dev, "Tx descriptor %d is %08x%s\n" ,
i, RTL_R32(TxStatus0 + (i * 4 )),
i == tp->dirty_tx % NUM_TX_DESC ?
" (queue head)" : "" );
tp->xstats.tx_timeouts++;
/* disable Tx ASAP, if not already */
tmp8 = RTL_R8 (ChipCmd);
if (tmp8 & CmdTxEnb)
RTL_W8 (ChipCmd, CmdRxEnb);
netdev_lock(dev);
spin_lock_bh(&tp->rx_lock);
/* Disable interrupts by clearing the interrupt mask. */
RTL_W16 (IntrMask, 0 x0000);
/* Stop a shared interrupt from scavenging while we are. */
spin_lock_irq(&tp->lock);
rtl8139_tx_clear (tp);
spin_unlock_irq(&tp->lock);
/* ...and finally, reset everything */
napi_enable_locked(&tp->napi);
rtl8139_hw_start(dev);
netif_wake_queue(dev);
spin_unlock_bh(&tp->rx_lock);
netdev_unlock(dev);
}
static void rtl8139_tx_timeout(struct net_device *dev, unsigned int txqueue)
{
struct rtl8139_private *tp = netdev_priv(dev);
tp->watchdog_fired = 1 ;
if (!tp->have_thread) {
INIT_DELAYED_WORK(&tp->thread, rtl8139_thread);
schedule_delayed_work(&tp->thread, next_tick);
}
}
static netdev_tx_t rtl8139_start_xmit (struct sk_buff *skb,
struct net_device *dev)
{
struct rtl8139_private *tp = netdev_priv(dev);
void __iomem *ioaddr = tp->mmio_addr;
unsigned int entry;
unsigned int len = skb->len;
unsigned long flags;
/* Calculate the next Tx descriptor entry. */
entry = tp->cur_tx % NUM_TX_DESC;
/* Note: the chip doesn't have auto-pad! */
if (likely(len < TX_BUF_SIZE)) {
if (len < ETH_ZLEN)
memset(tp->tx_buf[entry], 0 , ETH_ZLEN);
skb_copy_and_csum_dev(skb, tp->tx_buf[entry]);
dev_kfree_skb_any(skb);
} else {
dev_kfree_skb_any(skb);
dev->stats.tx_dropped++;
return NETDEV_TX_OK;
}
spin_lock_irqsave(&tp->lock, flags);
/*
* Writing to TxStatus triggers a DMA transfer of the data
* copied to tp - > tx_buf [ entry ] above . Use a memory barrier
* to make sure that the device sees the updated data .
*/
wmb();
RTL_W32_F (TxStatus0 + (entry * sizeof (u32)),
tp->tx_flag | max(len, (unsigned int )ETH_ZLEN));
tp->cur_tx++;
if ((tp->cur_tx - NUM_TX_DESC) == tp->dirty_tx)
netif_stop_queue (dev);
spin_unlock_irqrestore(&tp->lock, flags);
netif_dbg(tp, tx_queued, dev, "Queued Tx packet size %u to slot %d\n" ,
len, entry);
return NETDEV_TX_OK;
}
static void rtl8139_tx_interrupt (struct net_device *dev,
struct rtl8139_private *tp,
void __iomem *ioaddr)
{
unsigned long dirty_tx, tx_left;
assert (dev != NULL);
assert (ioaddr != NULL);
dirty_tx = tp->dirty_tx;
tx_left = tp->cur_tx - dirty_tx;
while (tx_left > 0 ) {
int entry = dirty_tx % NUM_TX_DESC;
int txstatus;
txstatus = RTL_R32 (TxStatus0 + (entry * sizeof (u32)));
if (!(txstatus & (TxStatOK | TxUnderrun | TxAborted)))
break ; /* It still hasn't been Txed */
/* Note: TxCarrierLost is always asserted at 100mbps. */
if (txstatus & (TxOutOfWindow | TxAborted)) {
/* There was an major error, log it. */
netif_dbg(tp, tx_err, dev, "Transmit error, Tx status %08x\n" ,
txstatus);
dev->stats.tx_errors++;
if (txstatus & TxAborted) {
dev->stats.tx_aborted_errors++;
RTL_W32 (TxConfig, TxClearAbt);
RTL_W16 (IntrStatus, TxErr);
wmb();
}
if (txstatus & TxCarrierLost)
dev->stats.tx_carrier_errors++;
if (txstatus & TxOutOfWindow)
dev->stats.tx_window_errors++;
} else {
if (txstatus & TxUnderrun) {
/* Add 64 to the Tx FIFO threshold. */
if (tp->tx_flag < 0 x00300000)
tp->tx_flag += 0 x00020000;
dev->stats.tx_fifo_errors++;
}
dev->stats.collisions += (txstatus >> 24 ) & 15 ;
u64_stats_update_begin(&tp->tx_stats.syncp);
tp->tx_stats.packets++;
tp->tx_stats.bytes += txstatus & 0 x7ff;
u64_stats_update_end(&tp->tx_stats.syncp);
}
dirty_tx++;
tx_left--;
}
#ifndef RTL8139_NDEBUG
if (tp->cur_tx - dirty_tx > NUM_TX_DESC) {
netdev_err(dev, "Out-of-sync dirty pointer, %ld vs. %ld\n" ,
dirty_tx, tp->cur_tx);
dirty_tx += NUM_TX_DESC;
}
#endif /* RTL8139_NDEBUG */
/* only wake the queue if we did work, and the queue is stopped */
if (tp->dirty_tx != dirty_tx) {
tp->dirty_tx = dirty_tx;
mb();
netif_wake_queue (dev);
}
}
/* TODO: clean this up! Rx reset need not be this intensive */
static void rtl8139_rx_err (u32 rx_status, struct net_device *dev,
struct rtl8139_private *tp, void __iomem *ioaddr)
{
u8 tmp8;
#ifdef CONFIG_8139_OLD_RX_RESET
int tmp_work;
#endif
netif_dbg(tp, rx_err, dev, "Ethernet frame had errors, status %08x\n" ,
rx_status);
dev->stats.rx_errors++;
if (!(rx_status & RxStatusOK)) {
if (rx_status & RxTooLong) {
netdev_dbg(dev, "Oversized Ethernet frame, status %04x!\n" ,
rx_status);
/* A.C.: The chip hangs here. */
}
if (rx_status & (RxBadSymbol | RxBadAlign))
dev->stats.rx_frame_errors++;
if (rx_status & (RxRunt | RxTooLong))
dev->stats.rx_length_errors++;
if (rx_status & RxCRCErr)
dev->stats.rx_crc_errors++;
} else {
tp->xstats.rx_lost_in_ring++;
}
#ifndef CONFIG_8139_OLD_RX_RESET
tmp8 = RTL_R8 (ChipCmd);
RTL_W8 (ChipCmd, tmp8 & ~CmdRxEnb);
RTL_W8 (ChipCmd, tmp8);
RTL_W32 (RxConfig, tp->rx_config);
tp->cur_rx = 0 ;
#else
/* Reset the receiver, based on RealTek recommendation. (Bug?) */
/* disable receive */
RTL_W8_F (ChipCmd, CmdTxEnb);
tmp_work = 200 ;
while (--tmp_work > 0 ) {
udelay(1 );
tmp8 = RTL_R8 (ChipCmd);
if (!(tmp8 & CmdRxEnb))
break ;
}
if (tmp_work <= 0 )
netdev_warn(dev, "rx stop wait too long\n" );
/* restart receive */
tmp_work = 200 ;
while (--tmp_work > 0 ) {
RTL_W8_F (ChipCmd, CmdRxEnb | CmdTxEnb);
udelay(1 );
tmp8 = RTL_R8 (ChipCmd);
if ((tmp8 & CmdRxEnb) && (tmp8 & CmdTxEnb))
break ;
}
if (tmp_work <= 0 )
netdev_warn(dev, "tx/rx enable wait too long\n" );
/* and reinitialize all rx related registers */
RTL_W8_F (Cfg9346, Cfg9346_Unlock);
/* Must enable Tx/Rx before setting transfer thresholds! */
RTL_W8 (ChipCmd, CmdRxEnb | CmdTxEnb);
tp->rx_config = rtl8139_rx_config | AcceptBroadcast | AcceptMyPhys;
RTL_W32 (RxConfig, tp->rx_config);
tp->cur_rx = 0 ;
netdev_dbg(dev, "init buffer addresses\n" );
/* Lock Config[01234] and BMCR register writes */
RTL_W8 (Cfg9346, Cfg9346_Lock);
/* init Rx ring buffer DMA address */
RTL_W32_F (RxBuf, tp->rx_ring_dma);
/* A.C.: Reset the multicast list. */
__set_rx_mode (dev);
#endif
}
#if RX_BUF_IDX == 3
static inline void wrap_copy(struct sk_buff *skb, const unsigned char *ring,
u32 offset, unsigned int size)
{
u32 left = RX_BUF_LEN - offset;
if (size > left) {
skb_copy_to_linear_data(skb, ring + offset, left);
skb_copy_to_linear_data_offset(skb, left, ring, size - left);
} else
skb_copy_to_linear_data(skb, ring + offset, size);
}
#endif
static void rtl8139_isr_ack(struct rtl8139_private *tp)
{
void __iomem *ioaddr = tp->mmio_addr;
u16 status;
status = RTL_R16 (IntrStatus) & RxAckBits;
/* Clear out errors and receive interrupts */
if (likely(status != 0 )) {
if (unlikely(status & (RxFIFOOver | RxOverflow))) {
tp->dev->stats.rx_errors++;
if (status & RxFIFOOver)
tp->dev->stats.rx_fifo_errors++;
}
RTL_W16_F (IntrStatus, RxAckBits);
}
}
static int rtl8139_rx(struct net_device *dev, struct rtl8139_private *tp,
int budget)
{
void __iomem *ioaddr = tp->mmio_addr;
int received = 0 ;
unsigned char *rx_ring = tp->rx_ring;
unsigned int cur_rx = tp->cur_rx;
unsigned int rx_size = 0 ;
netdev_dbg(dev, "In %s(), current %04x BufAddr %04x, free to %04x, Cmd %02x\n" ,
__func__, (u16)cur_rx,
RTL_R16(RxBufAddr), RTL_R16(RxBufPtr), RTL_R8(ChipCmd));
while (netif_running(dev) && received < budget &&
(RTL_R8 (ChipCmd) & RxBufEmpty) == 0 ) {
u32 ring_offset = cur_rx % RX_BUF_LEN;
u32 rx_status;
unsigned int pkt_size;
struct sk_buff *skb;
rmb();
/* read size+status of next frame from DMA ring buffer */
rx_status = le32_to_cpu (*(__le32 *) (rx_ring + ring_offset));
rx_size = rx_status >> 16 ;
if (likely(!(dev->features & NETIF_F_RXFCS)))
pkt_size = rx_size - 4 ;
else
pkt_size = rx_size;
netif_dbg(tp, rx_status, dev, "%s() status %04x, size %04x, cur %04x\n" ,
__func__, rx_status, rx_size, cur_rx);
#if RTL8139_DEBUG > 2
print_hex_dump(KERN_DEBUG, "Frame contents: " ,
DUMP_PREFIX_OFFSET, 16 , 1 ,
&rx_ring[ring_offset], 70 , true );
#endif
/* Packet copy from FIFO still in progress.
* Theoretically , this should never happen
* since EarlyRx is disabled .
*/
if (unlikely(rx_size == 0 xfff0)) {
if (!tp->fifo_copy_timeout)
tp->fifo_copy_timeout = jiffies + 2 ;
else if (time_after(jiffies, tp->fifo_copy_timeout)) {
netdev_dbg(dev, "hung FIFO. Reset\n" );
rx_size = 0 ;
goto no_early_rx;
}
netif_dbg(tp, intr, dev, "fifo copy in progress\n" );
tp->xstats.early_rx++;
break ;
}
no_early_rx:
tp->fifo_copy_timeout = 0 ;
/* If Rx err or invalid rx_size/rx_status received
* ( which happens if we get lost in the ring ) ,
* Rx process gets reset , so we abort any further
* Rx processing .
*/
if (unlikely((rx_size > (MAX_ETH_FRAME_SIZE+4 )) ||
(rx_size < 8 ) ||
(!(rx_status & RxStatusOK)))) {
if ((dev->features & NETIF_F_RXALL) &&
(rx_size <= (MAX_ETH_FRAME_SIZE + 4 )) &&
(rx_size >= 8 ) &&
(!(rx_status & RxStatusOK))) {
/* Length is at least mostly OK, but pkt has
* error . I ' m hoping we can handle some of these
* errors without resetting the chip . - - Ben
*/
dev->stats.rx_errors++;
if (rx_status & RxCRCErr) {
dev->stats.rx_crc_errors++;
goto keep_pkt;
}
if (rx_status & RxRunt) {
dev->stats.rx_length_errors++;
goto keep_pkt;
}
}
rtl8139_rx_err (rx_status, dev, tp, ioaddr);
received = -1 ;
goto out;
}
keep_pkt:
/* Malloc up new buffer, compatible with net-2e. */
/* Omit the four octet CRC from the length. */
skb = napi_alloc_skb(&tp->napi, pkt_size);
if (likely(skb)) {
#if RX_BUF_IDX == 3
wrap_copy(skb, rx_ring, ring_offset+4 , pkt_size);
#else
skb_copy_to_linear_data (skb, &rx_ring[ring_offset + 4 ], pkt_size);
#endif
skb_put (skb, pkt_size);
skb->protocol = eth_type_trans (skb, dev);
u64_stats_update_begin(&tp->rx_stats.syncp);
tp->rx_stats.packets++;
tp->rx_stats.bytes += pkt_size;
u64_stats_update_end(&tp->rx_stats.syncp);
netif_receive_skb (skb);
} else {
dev->stats.rx_dropped++;
}
received++;
cur_rx = (cur_rx + rx_size + 4 + 3 ) & ~3 ;
RTL_W16 (RxBufPtr, (u16) (cur_rx - 16 ));
rtl8139_isr_ack(tp);
}
if (unlikely(!received || rx_size == 0 xfff0))
rtl8139_isr_ack(tp);
netdev_dbg(dev, "Done %s(), current %04x BufAddr %04x, free to %04x, Cmd %02x\n" ,
__func__, cur_rx,
RTL_R16(RxBufAddr), RTL_R16(RxBufPtr), RTL_R8(ChipCmd));
tp->cur_rx = cur_rx;
/*
* The receive buffer should be mostly empty .
* Tell NAPI to reenable the Rx irq .
*/
if (tp->fifo_copy_timeout)
received = budget;
out:
return received;
}
static void rtl8139_weird_interrupt (struct net_device *dev,
struct rtl8139_private *tp,
void __iomem *ioaddr,
int status, int link_changed)
{
netdev_dbg(dev, "Abnormal interrupt, status %08x\n" , status);
assert (dev != NULL);
assert (tp != NULL);
assert (ioaddr != NULL);
/* Update the error count. */
dev->stats.rx_missed_errors += RTL_R32 (RxMissed);
RTL_W32 (RxMissed, 0 );
if ((status & RxUnderrun) && link_changed &&
(tp->drv_flags & HAS_LNK_CHNG)) {
rtl_check_media(dev, 0 );
status &= ~RxUnderrun;
}
if (status & (RxUnderrun | RxErr))
dev->stats.rx_errors++;
if (status & PCSTimeout)
dev->stats.rx_length_errors++;
if (status & RxUnderrun)
dev->stats.rx_fifo_errors++;
if (status & PCIErr) {
u16 pci_cmd_status;
pci_read_config_word (tp->pci_dev, PCI_STATUS, &pci_cmd_status);
pci_write_config_word (tp->pci_dev, PCI_STATUS, pci_cmd_status);
netdev_err(dev, "PCI Bus error %04x\n" , pci_cmd_status);
}
}
static int rtl8139_poll(struct napi_struct *napi, int budget)
{
struct rtl8139_private *tp = container_of(napi, struct rtl8139_private, napi);
struct net_device *dev = tp->dev;
void __iomem *ioaddr = tp->mmio_addr;
int work_done;
spin_lock(&tp->rx_lock);
work_done = 0 ;
if (likely(RTL_R16(IntrStatus) & RxAckBits))
work_done += rtl8139_rx(dev, tp, budget);
if (work_done < budget) {
unsigned long flags;
spin_lock_irqsave(&tp->lock, flags);
if (napi_complete_done(napi, work_done))
RTL_W16_F(IntrMask, rtl8139_intr_mask);
spin_unlock_irqrestore(&tp->lock, flags);
}
spin_unlock(&tp->rx_lock);
return work_done;
}
/* The interrupt handler does all of the Rx thread work and cleans up
after the Tx thread. */
static irqreturn_t rtl8139_interrupt (int irq, void *dev_instance)
{
struct net_device *dev = (struct net_device *) dev_instance;
struct rtl8139_private *tp = netdev_priv(dev);
void __iomem *ioaddr = tp->mmio_addr;
u16 status, ackstat;
int link_changed = 0 ; /* avoid bogus "uninit" warning */
int handled = 0 ;
spin_lock (&tp->lock);
status = RTL_R16 (IntrStatus);
/* shared irq? */
if (unlikely((status & rtl8139_intr_mask) == 0 ))
goto out;
handled = 1 ;
/* h/w no longer present (hotplug?) or major error, bail */
if (unlikely(status == 0 xFFFF))
goto out;
/* close possible race's with dev_close */
if (unlikely(!netif_running(dev))) {
RTL_W16 (IntrMask, 0 );
goto out;
}
/* Acknowledge all of the current interrupt sources ASAP, but
an first get an additional status bit from CSCR. */
if (unlikely(status & RxUnderrun))
link_changed = RTL_R16 (CSCR) & CSCR_LinkChangeBit;
ackstat = status & ~(RxAckBits | TxErr);
if (ackstat)
RTL_W16 (IntrStatus, ackstat);
/* Receive packets are processed by poll routine.
If not running start it now. */
if (status & RxAckBits){
if (napi_schedule_prep(&tp->napi)) {
RTL_W16_F (IntrMask, rtl8139_norx_intr_mask);
__napi_schedule(&tp->napi);
}
}
/* Check uncommon events with one test. */
if (unlikely(status & (PCIErr | PCSTimeout | RxUnderrun | RxErr)))
rtl8139_weird_interrupt (dev, tp, ioaddr,
status, link_changed);
if (status & (TxOK | TxErr)) {
rtl8139_tx_interrupt (dev, tp, ioaddr);
if (status & TxErr)
RTL_W16 (IntrStatus, TxErr);
}
out:
spin_unlock (&tp->lock);
netdev_dbg(dev, "exiting interrupt, intr_status=%#4.4x\n" ,
RTL_R16(IntrStatus));
return IRQ_RETVAL(handled);
}
#ifdef CONFIG_NET_POLL_CONTROLLER
/*
* Polling receive - used by netconsole and other diagnostic tools
* to allow network i / o with interrupts disabled .
*/
static void rtl8139_poll_controller(struct net_device *dev)
{
struct rtl8139_private *tp = netdev_priv(dev);
const int irq = tp->pci_dev->irq;
disable_irq_nosync(irq);
rtl8139_interrupt(irq, dev);
enable_irq(irq);
}
#endif
static int rtl8139_set_mac_address(struct net_device *dev, void *p)
{
struct rtl8139_private *tp = netdev_priv(dev);
void __iomem *ioaddr = tp->mmio_addr;
struct sockaddr *addr = p;
if (!is_valid_ether_addr(addr->sa_data))
return -EADDRNOTAVAIL;
eth_hw_addr_set(dev, addr->sa_data);
spin_lock_irq(&tp->lock);
RTL_W8_F(Cfg9346, Cfg9346_Unlock);
RTL_W32_F(MAC0 + 0 , cpu_to_le32 (*(u32 *) (dev->dev_addr + 0 )));
RTL_W32_F(MAC0 + 4 , cpu_to_le32 (*(u32 *) (dev->dev_addr + 4 )));
RTL_W8_F(Cfg9346, Cfg9346_Lock);
spin_unlock_irq(&tp->lock);
return 0 ;
}
static int rtl8139_close (struct net_device *dev)
{
struct rtl8139_private *tp = netdev_priv(dev);
void __iomem *ioaddr = tp->mmio_addr;
unsigned long flags;
netif_stop_queue(dev);
napi_disable(&tp->napi);
netif_dbg(tp, ifdown, dev, "Shutting down ethercard, status was 0x%04x\n" ,
RTL_R16(IntrStatus));
spin_lock_irqsave (&tp->lock, flags);
/* Stop the chip's Tx and Rx DMA processes. */
RTL_W8 (ChipCmd, 0 );
/* Disable interrupts by clearing the interrupt mask. */
RTL_W16 (IntrMask, 0 );
/* Update the error counts. */
dev->stats.rx_missed_errors += RTL_R32 (RxMissed);
RTL_W32 (RxMissed, 0 );
spin_unlock_irqrestore (&tp->lock, flags);
free_irq(tp->pci_dev->irq, dev);
rtl8139_tx_clear (tp);
dma_free_coherent(&tp->pci_dev->dev, RX_BUF_TOT_LEN,
tp->rx_ring, tp->rx_ring_dma);
dma_free_coherent(&tp->pci_dev->dev, TX_BUF_TOT_LEN,
tp->tx_bufs, tp->tx_bufs_dma);
tp->rx_ring = NULL;
tp->tx_bufs = NULL;
/* Green! Put the chip in low-power mode. */
RTL_W8 (Cfg9346, Cfg9346_Unlock);
if (rtl_chip_info[tp->chipset].flags & HasHltClk)
RTL_W8 (HltClk, 'H' ); /* 'R' would leave the clock running. */
return 0 ;
}
/* Get the ethtool Wake-on-LAN settings. Assumes that wol points to
kernel memory , * wol has been initialized as { ETHTOOL_GWOL } , and
other threads or interrupts aren't messing with the 8139. */
static void rtl8139_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
{
struct rtl8139_private *tp = netdev_priv(dev);
void __iomem *ioaddr = tp->mmio_addr;
spin_lock_irq(&tp->lock);
if (rtl_chip_info[tp->chipset].flags & HasLWake) {
u8 cfg3 = RTL_R8 (Config3);
u8 cfg5 = RTL_R8 (Config5);
wol->supported = WAKE_PHY | WAKE_MAGIC
| WAKE_UCAST | WAKE_MCAST | WAKE_BCAST;
wol->wolopts = 0 ;
if (cfg3 & Cfg3_LinkUp)
wol->wolopts |= WAKE_PHY;
if (cfg3 & Cfg3_Magic)
wol->wolopts |= WAKE_MAGIC;
/* (KON)FIXME: See how netdev_set_wol() handles the
following constants. */
if (cfg5 & Cfg5_UWF)
wol->wolopts |= WAKE_UCAST;
if (cfg5 & Cfg5_MWF)
wol->wolopts |= WAKE_MCAST;
if (cfg5 & Cfg5_BWF)
wol->wolopts |= WAKE_BCAST;
}
spin_unlock_irq(&tp->lock);
}
/* Set the ethtool Wake-on-LAN settings. Return 0 or -errno. Assumes
that wol points to kernel memory and other threads or interrupts
aren't messing with the 8139. */
static int rtl8139_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
{
struct rtl8139_private *tp = netdev_priv(dev);
void __iomem *ioaddr = tp->mmio_addr;
u32 support;
u8 cfg3, cfg5;
support = ((rtl_chip_info[tp->chipset].flags & HasLWake)
? (WAKE_PHY | WAKE_MAGIC
| WAKE_UCAST | WAKE_MCAST | WAKE_BCAST)
: 0 );
if (wol->wolopts & ~support)
return -EINVAL;
spin_lock_irq(&tp->lock);
cfg3 = RTL_R8 (Config3) & ~(Cfg3_LinkUp | Cfg3_Magic);
if (wol->wolopts & WAKE_PHY)
cfg3 |= Cfg3_LinkUp;
if (wol->wolopts & WAKE_MAGIC)
cfg3 |= Cfg3_Magic;
RTL_W8 (Cfg9346, Cfg9346_Unlock);
RTL_W8 (Config3, cfg3);
RTL_W8 (Cfg9346, Cfg9346_Lock);
cfg5 = RTL_R8 (Config5) & ~(Cfg5_UWF | Cfg5_MWF | Cfg5_BWF);
/* (KON)FIXME: These are untested. We may have to set the
CRC0 , Wakeup0 and LSBCRC0 registers too , but I have no
documentation. */
if (wol->wolopts & WAKE_UCAST)
cfg5 |= Cfg5_UWF;
if (wol->wolopts & WAKE_MCAST)
cfg5 |= Cfg5_MWF;
if (wol->wolopts & WAKE_BCAST)
cfg5 |= Cfg5_BWF;
RTL_W8 (Config5, cfg5); /* need not unlock via Cfg9346 */
spin_unlock_irq(&tp->lock);
return 0 ;
}
static void rtl8139_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
struct rtl8139_private *tp = netdev_priv(dev);
strscpy(info->driver, DRV_NAME, sizeof (info->driver));
strscpy(info->version, DRV_VERSION, sizeof (info->version));
strscpy(info->bus_info, pci_name(tp->pci_dev), sizeof (info->bus_info));
}
static int rtl8139_get_link_ksettings(struct net_device *dev,
struct ethtool_link_ksettings *cmd)
{
struct rtl8139_private *tp = netdev_priv(dev);
spin_lock_irq(&tp->lock);
mii_ethtool_get_link_ksettings(&tp->mii, cmd);
spin_unlock_irq(&tp->lock);
return 0 ;
}
static int rtl8139_set_link_ksettings(struct net_device *dev,
const struct ethtool_link_ksettings *cmd)
{
struct rtl8139_private *tp = netdev_priv(dev);
int rc;
spin_lock_irq(&tp->lock);
rc = mii_ethtool_set_link_ksettings(&tp->mii, cmd);
spin_unlock_irq(&tp->lock);
return rc;
}
static int rtl8139_nway_reset(struct net_device *dev)
{
struct rtl8139_private *tp = netdev_priv(dev);
return mii_nway_restart(&tp->mii);
}
static u32 rtl8139_get_link(struct net_device *dev)
{
struct rtl8139_private *tp = netdev_priv(dev);
return mii_link_ok(&tp->mii);
}
static u32 rtl8139_get_msglevel(struct net_device *dev)
{
struct rtl8139_private *tp = netdev_priv(dev);
return tp->msg_enable;
}
static void rtl8139_set_msglevel(struct net_device *dev, u32 datum)
{
struct rtl8139_private *tp = netdev_priv(dev);
tp->msg_enable = datum;
}
static int rtl8139_get_regs_len(struct net_device *dev)
{
struct rtl8139_private *tp;
/* TODO: we are too slack to do reg dumping for pio, for now */
if (use_io)
return 0 ;
tp = netdev_priv(dev);
return tp->regs_len;
}
static void rtl8139_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regbuf)
{
struct rtl8139_private *tp;
/* TODO: we are too slack to do reg dumping for pio, for now */
if (use_io)
return ;
tp = netdev_priv(dev);
regs->version = RTL_REGS_VER;
spin_lock_irq(&tp->lock);
memcpy_fromio(regbuf, tp->mmio_addr, regs->len);
spin_unlock_irq(&tp->lock);
}
static int rtl8139_get_sset_count(struct net_device *dev, int sset)
{
switch (sset) {
case ETH_SS_STATS:
return RTL_NUM_STATS;
default :
return -EOPNOTSUPP;
}
}
static void rtl8139_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data)
{
struct rtl8139_private *tp = netdev_priv(dev);
data[0 ] = tp->xstats.early_rx;
data[1 ] = tp->xstats.tx_buf_mapped;
data[2 ] = tp->xstats.tx_timeouts;
data[3 ] = tp->xstats.rx_lost_in_ring;
}
static void rtl8139_get_strings(struct net_device *dev, u32 stringset, u8 *data)
{
memcpy(data, ethtool_stats_keys, sizeof (ethtool_stats_keys));
}
static const struct ethtool_ops rtl8139_ethtool_ops = {
.get_drvinfo = rtl8139_get_drvinfo,
.get_regs_len = rtl8139_get_regs_len,
.get_regs = rtl8139_get_regs,
.nway_reset = rtl8139_nway_reset,
.get_link = rtl8139_get_link,
.get_msglevel = rtl8139_get_msglevel,
.set_msglevel = rtl8139_set_msglevel,
.get_wol = rtl8139_get_wol,
.set_wol = rtl8139_set_wol,
.get_strings = rtl8139_get_strings,
.get_sset_count = rtl8139_get_sset_count,
.get_ethtool_stats = rtl8139_get_ethtool_stats,
.get_link_ksettings = rtl8139_get_link_ksettings,
.set_link_ksettings = rtl8139_set_link_ksettings,
};
static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
struct rtl8139_private *tp = netdev_priv(dev);
int rc;
if (!netif_running(dev))
return -EINVAL;
spin_lock_irq(&tp->lock);
rc = generic_mii_ioctl(&tp->mii, if_mii(rq), cmd, NULL);
spin_unlock_irq(&tp->lock);
return rc;
}
static void
rtl8139_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
{
struct rtl8139_private *tp = netdev_priv(dev);
void __iomem *ioaddr = tp->mmio_addr;
unsigned long flags;
unsigned int start;
if (netif_running(dev)) {
spin_lock_irqsave (&tp->lock, flags);
dev->stats.rx_missed_errors += RTL_R32 (RxMissed);
RTL_W32 (RxMissed, 0 );
spin_unlock_irqrestore (&tp->lock, flags);
}
netdev_stats_to_stats64(stats, &dev->stats);
do {
start = u64_stats_fetch_begin(&tp->rx_stats.syncp);
stats->rx_packets = tp->rx_stats.packets;
stats->rx_bytes = tp->rx_stats.bytes;
} while (u64_stats_fetch_retry(&tp->rx_stats.syncp, start));
do {
start = u64_stats_fetch_begin(&tp->tx_stats.syncp);
stats->tx_packets = tp->tx_stats.packets;
stats->tx_bytes = tp->tx_stats.bytes;
} while (u64_stats_fetch_retry(&tp->tx_stats.syncp, start));
}
/* Set or clear the multicast filter for this adaptor.
This routine is not state sensitive and need not be SMP locked. */
static void __set_rx_mode (struct net_device *dev)
{
struct rtl8139_private *tp = netdev_priv(dev);
void __iomem *ioaddr = tp->mmio_addr;
u32 mc_filter[2 ]; /* Multicast hash filter */
int rx_mode;
u32 tmp;
netdev_dbg(dev, "rtl8139_set_rx_mode(%04x) done -- Rx config %08x\n" ,
dev->flags, RTL_R32(RxConfig));
/* Note: do not reorder, GCC is clever about common statements. */
if (dev->flags & IFF_PROMISC) {
rx_mode =
AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
AcceptAllPhys;
mc_filter[1 ] = mc_filter[0 ] = 0 xffffffff;
} else if ((netdev_mc_count(dev) > multicast_filter_limit) ||
(dev->flags & IFF_ALLMULTI)) {
/* Too many to filter perfectly -- accept all multicasts. */
rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
mc_filter[1 ] = mc_filter[0 ] = 0 xffffffff;
} else {
struct netdev_hw_addr *ha;
rx_mode = AcceptBroadcast | AcceptMyPhys;
mc_filter[1 ] = mc_filter[0 ] = 0 ;
netdev_for_each_mc_addr(ha, dev) {
int bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26 ;
mc_filter[bit_nr >> 5 ] |= 1 << (bit_nr & 31 );
rx_mode |= AcceptMulticast;
}
}
if (dev->features & NETIF_F_RXALL)
rx_mode |= (AcceptErr | AcceptRunt);
/* We can safely update without stopping the chip. */
tmp = rtl8139_rx_config | rx_mode;
if (tp->rx_config != tmp) {
RTL_W32_F (RxConfig, tmp);
tp->rx_config = tmp;
}
RTL_W32_F (MAR0 + 0 , mc_filter[0 ]);
RTL_W32_F (MAR0 + 4 , mc_filter[1 ]);
}
static void rtl8139_set_rx_mode (struct net_device *dev)
{
unsigned long flags;
struct rtl8139_private *tp = netdev_priv(dev);
spin_lock_irqsave (&tp->lock, flags);
__set_rx_mode(dev);
spin_unlock_irqrestore (&tp->lock, flags);
}
static int __maybe_unused rtl8139_suspend(struct device *device)
{
struct net_device *dev = dev_get_drvdata(device);
struct rtl8139_private *tp = netdev_priv(dev);
void __iomem *ioaddr = tp->mmio_addr;
unsigned long flags;
if (!netif_running (dev))
return 0 ;
netif_device_detach (dev);
spin_lock_irqsave (&tp->lock, flags);
/* Disable interrupts, stop Tx and Rx. */
RTL_W16 (IntrMask, 0 );
RTL_W8 (ChipCmd, 0 );
/* Update the error counts. */
dev->stats.rx_missed_errors += RTL_R32 (RxMissed);
RTL_W32 (RxMissed, 0 );
spin_unlock_irqrestore (&tp->lock, flags);
return 0 ;
}
static int __maybe_unused rtl8139_resume(struct device *device)
{
struct net_device *dev = dev_get_drvdata(device);
if (!netif_running (dev))
return 0 ;
rtl8139_init_ring (dev);
rtl8139_hw_start (dev);
netif_device_attach (dev);
return 0 ;
}
static SIMPLE_DEV_PM_OPS(rtl8139_pm_ops, rtl8139_suspend, rtl8139_resume);
static struct pci_driver rtl8139_pci_driver = {
.name = DRV_NAME,
.id_table = rtl8139_pci_tbl,
.probe = rtl8139_init_one,
.remove = rtl8139_remove_one,
.driver.pm = &rtl8139_pm_ops,
};
static int __init rtl8139_init_module (void )
{
/* when we're a module, we always print a version message,
* even if no 8139 board is found .
*/
#ifdef MODULE
pr_info(RTL8139_DRIVER_NAME "\n" );
#endif
return pci_register_driver(&rtl8139_pci_driver);
}
static void __exit rtl8139_cleanup_module (void )
{
pci_unregister_driver (&rtl8139_pci_driver);
}
module_init(rtl8139_init_module);
module_exit(rtl8139_cleanup_module);
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