diff options
Diffstat (limited to 'src/hw/net/rtl8139.c')
| -rw-r--r-- | src/hw/net/rtl8139.c | 3509 |
1 files changed, 3509 insertions, 0 deletions
diff --git a/src/hw/net/rtl8139.c b/src/hw/net/rtl8139.c new file mode 100644 index 0000000..68e43f3 --- /dev/null +++ b/src/hw/net/rtl8139.c @@ -0,0 +1,3509 @@ +/** + * QEMU RTL8139 emulation + * + * Copyright (c) 2006 Igor Kovalenko + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + + * Modifications: + * 2006-Jan-28 Mark Malakanov : TSAD and CSCR implementation (for Windows driver) + * + * 2006-Apr-28 Juergen Lock : EEPROM emulation changes for FreeBSD driver + * HW revision ID changes for FreeBSD driver + * + * 2006-Jul-01 Igor Kovalenko : Implemented loopback mode for FreeBSD driver + * Corrected packet transfer reassembly routine for 8139C+ mode + * Rearranged debugging print statements + * Implemented PCI timer interrupt (disabled by default) + * Implemented Tally Counters, increased VM load/save version + * Implemented IP/TCP/UDP checksum task offloading + * + * 2006-Jul-04 Igor Kovalenko : Implemented TCP segmentation offloading + * Fixed MTU=1500 for produced ethernet frames + * + * 2006-Jul-09 Igor Kovalenko : Fixed TCP header length calculation while processing + * segmentation offloading + * Removed slirp.h dependency + * Added rx/tx buffer reset when enabling rx/tx operation + * + * 2010-Feb-04 Frediano Ziglio: Rewrote timer support using QEMU timer only + * when strictly needed (required for + * Darwin) + * 2011-Mar-22 Benjamin Poirier: Implemented VLAN offloading + */ + +/* For crc32 */ +#include <zlib.h> + +#include "hw/hw.h" +#include "hw/pci/pci.h" +#include "sysemu/dma.h" +#include "qemu/timer.h" +#include "net/net.h" +#include "net/eth.h" +#include "hw/loader.h" +#include "sysemu/sysemu.h" +#include "qemu/iov.h" + +/* debug RTL8139 card */ +//#define DEBUG_RTL8139 1 + +#define PCI_PERIOD 30 /* 30 ns period = 33.333333 Mhz frequency */ + +#define SET_MASKED(input, mask, curr) \ + ( ( (input) & ~(mask) ) | ( (curr) & (mask) ) ) + +/* arg % size for size which is a power of 2 */ +#define MOD2(input, size) \ + ( ( input ) & ( size - 1 ) ) + +#define ETHER_TYPE_LEN 2 +#define ETH_HLEN (ETH_ALEN * 2 + ETHER_TYPE_LEN) +#define ETH_MTU 1500 + +#define VLAN_TCI_LEN 2 +#define VLAN_HLEN (ETHER_TYPE_LEN + VLAN_TCI_LEN) + +#if defined (DEBUG_RTL8139) +# define DPRINTF(fmt, ...) \ + do { fprintf(stderr, "RTL8139: " fmt, ## __VA_ARGS__); } while (0) +#else +static inline GCC_FMT_ATTR(1, 2) int DPRINTF(const char *fmt, ...) +{ + return 0; +} +#endif + +#define TYPE_RTL8139 "rtl8139" + +#define RTL8139(obj) \ + OBJECT_CHECK(RTL8139State, (obj), TYPE_RTL8139) + +/* Symbolic offsets to registers. */ +enum RTL8139_registers { + MAC0 = 0, /* Ethernet hardware address. */ + MAR0 = 8, /* Multicast filter. */ + TxStatus0 = 0x10,/* Transmit status (Four 32bit registers). C mode only */ + /* Dump Tally Conter control register(64bit). C+ mode only */ + TxAddr0 = 0x20, /* Tx descriptors (also four 32bit). */ + RxBuf = 0x30, + ChipCmd = 0x37, + RxBufPtr = 0x38, + RxBufAddr = 0x3A, + IntrMask = 0x3C, + IntrStatus = 0x3E, + TxConfig = 0x40, + RxConfig = 0x44, + Timer = 0x48, /* A general-purpose counter. */ + RxMissed = 0x4C, /* 24 bits valid, write clears. */ + Cfg9346 = 0x50, + Config0 = 0x51, + Config1 = 0x52, + FlashReg = 0x54, + MediaStatus = 0x58, + Config3 = 0x59, + Config4 = 0x5A, /* absent on RTL-8139A */ + HltClk = 0x5B, + MultiIntr = 0x5C, + PCIRevisionID = 0x5E, + TxSummary = 0x60, /* TSAD register. Transmit Status of All Descriptors*/ + BasicModeCtrl = 0x62, + BasicModeStatus = 0x64, + NWayAdvert = 0x66, + NWayLPAR = 0x68, + NWayExpansion = 0x6A, + /* Undocumented registers, but required for proper operation. */ + FIFOTMS = 0x70, /* FIFO Control and test. */ + CSCR = 0x74, /* Chip Status and Configuration Register. */ + PARA78 = 0x78, + PARA7c = 0x7c, /* Magic transceiver parameter register. */ + Config5 = 0xD8, /* absent on RTL-8139A */ + /* C+ mode */ + TxPoll = 0xD9, /* Tell chip to check Tx descriptors for work */ + RxMaxSize = 0xDA, /* Max size of an Rx packet (8169 only) */ + CpCmd = 0xE0, /* C+ Command register (C+ mode only) */ + IntrMitigate = 0xE2, /* rx/tx interrupt mitigation control */ + RxRingAddrLO = 0xE4, /* 64-bit start addr of Rx ring */ + RxRingAddrHI = 0xE8, /* 64-bit start addr of Rx ring */ + TxThresh = 0xEC, /* Early Tx threshold */ +}; + +enum ClearBitMasks { + MultiIntrClear = 0xF000, + ChipCmdClear = 0xE2, + Config1Clear = (1<<7)|(1<<6)|(1<<3)|(1<<2)|(1<<1), +}; + +enum ChipCmdBits { + CmdReset = 0x10, + CmdRxEnb = 0x08, + CmdTxEnb = 0x04, + RxBufEmpty = 0x01, +}; + +/* C+ mode */ +enum CplusCmdBits { + CPlusRxVLAN = 0x0040, /* enable receive VLAN detagging */ + CPlusRxChkSum = 0x0020, /* enable receive checksum offloading */ + CPlusRxEnb = 0x0002, + CPlusTxEnb = 0x0001, +}; + +/* Interrupt register bits, using my own meaningful names. */ +enum IntrStatusBits { + PCIErr = 0x8000, + PCSTimeout = 0x4000, + RxFIFOOver = 0x40, + RxUnderrun = 0x20, /* Packet Underrun / Link Change */ + RxOverflow = 0x10, + TxErr = 0x08, + TxOK = 0x04, + RxErr = 0x02, + RxOK = 0x01, + + RxAckBits = RxFIFOOver | RxOverflow | RxOK, +}; + +enum TxStatusBits { + TxHostOwns = 0x2000, + TxUnderrun = 0x4000, + TxStatOK = 0x8000, + TxOutOfWindow = 0x20000000, + TxAborted = 0x40000000, + TxCarrierLost = 0x80000000, +}; +enum RxStatusBits { + RxMulticast = 0x8000, + RxPhysical = 0x4000, + RxBroadcast = 0x2000, + RxBadSymbol = 0x0020, + RxRunt = 0x0010, + RxTooLong = 0x0008, + RxCRCErr = 0x0004, + RxBadAlign = 0x0002, + RxStatusOK = 0x0001, +}; + +/* Bits in RxConfig. */ +enum rx_mode_bits { + AcceptErr = 0x20, + AcceptRunt = 0x10, + AcceptBroadcast = 0x08, + AcceptMulticast = 0x04, + AcceptMyPhys = 0x02, + AcceptAllPhys = 0x01, +}; + +/* 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 appending CRC to end of Tx packets */ + TxClearAbt = (1 << 0), /* Clear abort (WO) */ + TxDMAShift = 8, /* DMA burst value (0-7) is shifted this many bits */ + TxRetryShift = 4, /* TXRR value (0-15) is shifted this many bits */ + + TxVersionMask = 0x7C800000, /* mask out version bits 30-26, 23 */ +}; + + +/* Transmit Status of All Descriptors (TSAD) Register */ +enum TSAD_bits { + TSAD_TOK3 = 1<<15, // TOK bit of Descriptor 3 + TSAD_TOK2 = 1<<14, // TOK bit of Descriptor 2 + TSAD_TOK1 = 1<<13, // TOK bit of Descriptor 1 + TSAD_TOK0 = 1<<12, // TOK bit of Descriptor 0 + TSAD_TUN3 = 1<<11, // TUN bit of Descriptor 3 + TSAD_TUN2 = 1<<10, // TUN bit of Descriptor 2 + TSAD_TUN1 = 1<<9, // TUN bit of Descriptor 1 + TSAD_TUN0 = 1<<8, // TUN bit of Descriptor 0 + TSAD_TABT3 = 1<<07, // TABT bit of Descriptor 3 + TSAD_TABT2 = 1<<06, // TABT bit of Descriptor 2 + TSAD_TABT1 = 1<<05, // TABT bit of Descriptor 1 + TSAD_TABT0 = 1<<04, // TABT bit of Descriptor 0 + TSAD_OWN3 = 1<<03, // OWN bit of Descriptor 3 + TSAD_OWN2 = 1<<02, // OWN bit of Descriptor 2 + TSAD_OWN1 = 1<<01, // OWN bit of Descriptor 1 + TSAD_OWN0 = 1<<00, // OWN bit of Descriptor 0 +}; + + +/* Bits in Config1 */ +enum Config1Bits { + Cfg1_PM_Enable = 0x01, + Cfg1_VPD_Enable = 0x02, + Cfg1_PIO = 0x04, + Cfg1_MMIO = 0x08, + LWAKE = 0x10, /* not on 8139, 8139A */ + Cfg1_Driver_Load = 0x20, + Cfg1_LED0 = 0x40, + Cfg1_LED1 = 0x80, + 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 = 0x0400, + CSCR_LinkChangeBit = 0x0800, + CSCR_LinkStatusBits = 0x0f000, + CSCR_LinkDownOffCmd = 0x003c0, + CSCR_LinkDownCmd = 0x0f3c0, +*/ +enum CSCRBits { + CSCR_Testfun = 1<<15, /* 1 = Auto-neg speeds up internal timer, WO, def 0 */ + CSCR_LD = 1<<9, /* Active low TPI link disable signal. When low, TPI still transmits link pulses and TPI stays in good link state. def 1*/ + CSCR_HEART_BIT = 1<<8, /* 1 = HEART BEAT enable, 0 = HEART BEAT disable. HEART BEAT function is only valid in 10Mbps mode. def 1*/ + CSCR_JBEN = 1<<7, /* 1 = enable jabber function. 0 = disable jabber function, def 1*/ + CSCR_F_LINK_100 = 1<<6, /* Used to login force good link in 100Mbps for diagnostic purposes. 1 = DISABLE, 0 = ENABLE. def 1*/ + CSCR_F_Connect = 1<<5, /* Assertion of this bit forces the disconnect function to be bypassed. def 0*/ + CSCR_Con_status = 1<<3, /* This bit indicates the status of the connection. 1 = valid connected link detected; 0 = disconnected link detected. RO def 0*/ + CSCR_Con_status_En = 1<<2, /* Assertion of this bit configures LED1 pin to indicate connection status. def 0*/ + CSCR_PASS_SCR = 1<<0, /* Bypass Scramble, def 0*/ +}; + +enum Cfg9346Bits { + Cfg9346_Normal = 0x00, + Cfg9346_Autoload = 0x40, + Cfg9346_Programming = 0x80, + Cfg9346_ConfigWrite = 0xC0, +}; + +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) + +#define RTL8139_PCI_REVID_8139 0x10 +#define RTL8139_PCI_REVID_8139CPLUS 0x20 + +#define RTL8139_PCI_REVID RTL8139_PCI_REVID_8139CPLUS + +/* Size is 64 * 16bit words */ +#define EEPROM_9346_ADDR_BITS 6 +#define EEPROM_9346_SIZE (1 << EEPROM_9346_ADDR_BITS) +#define EEPROM_9346_ADDR_MASK (EEPROM_9346_SIZE - 1) + +enum Chip9346Operation +{ + Chip9346_op_mask = 0xc0, /* 10 zzzzzz */ + Chip9346_op_read = 0x80, /* 10 AAAAAA */ + Chip9346_op_write = 0x40, /* 01 AAAAAA D(15)..D(0) */ + Chip9346_op_ext_mask = 0xf0, /* 11 zzzzzz */ + Chip9346_op_write_enable = 0x30, /* 00 11zzzz */ + Chip9346_op_write_all = 0x10, /* 00 01zzzz */ + Chip9346_op_write_disable = 0x00, /* 00 00zzzz */ +}; + +enum Chip9346Mode +{ + Chip9346_none = 0, + Chip9346_enter_command_mode, + Chip9346_read_command, + Chip9346_data_read, /* from output register */ + Chip9346_data_write, /* to input register, then to contents at specified address */ + Chip9346_data_write_all, /* to input register, then filling contents */ +}; + +typedef struct EEprom9346 +{ + uint16_t contents[EEPROM_9346_SIZE]; + int mode; + uint32_t tick; + uint8_t address; + uint16_t input; + uint16_t output; + + uint8_t eecs; + uint8_t eesk; + uint8_t eedi; + uint8_t eedo; +} EEprom9346; + +typedef struct RTL8139TallyCounters +{ + /* Tally counters */ + uint64_t TxOk; + uint64_t RxOk; + uint64_t TxERR; + uint32_t RxERR; + uint16_t MissPkt; + uint16_t FAE; + uint32_t Tx1Col; + uint32_t TxMCol; + uint64_t RxOkPhy; + uint64_t RxOkBrd; + uint32_t RxOkMul; + uint16_t TxAbt; + uint16_t TxUndrn; +} RTL8139TallyCounters; + +/* Clears all tally counters */ +static void RTL8139TallyCounters_clear(RTL8139TallyCounters* counters); + +typedef struct RTL8139State { + /*< private >*/ + PCIDevice parent_obj; + /*< public >*/ + + uint8_t phys[8]; /* mac address */ + uint8_t mult[8]; /* multicast mask array */ + + uint32_t TxStatus[4]; /* TxStatus0 in C mode*/ /* also DTCCR[0] and DTCCR[1] in C+ mode */ + uint32_t TxAddr[4]; /* TxAddr0 */ + uint32_t RxBuf; /* Receive buffer */ + uint32_t RxBufferSize;/* internal variable, receive ring buffer size in C mode */ + uint32_t RxBufPtr; + uint32_t RxBufAddr; + + uint16_t IntrStatus; + uint16_t IntrMask; + + uint32_t TxConfig; + uint32_t RxConfig; + uint32_t RxMissed; + + uint16_t CSCR; + + uint8_t Cfg9346; + uint8_t Config0; + uint8_t Config1; + uint8_t Config3; + uint8_t Config4; + uint8_t Config5; + + uint8_t clock_enabled; + uint8_t bChipCmdState; + + uint16_t MultiIntr; + + uint16_t BasicModeCtrl; + uint16_t BasicModeStatus; + uint16_t NWayAdvert; + uint16_t NWayLPAR; + uint16_t NWayExpansion; + + uint16_t CpCmd; + uint8_t TxThresh; + + NICState *nic; + NICConf conf; + + /* C ring mode */ + uint32_t currTxDesc; + + /* C+ mode */ + uint32_t cplus_enabled; + + uint32_t currCPlusRxDesc; + uint32_t currCPlusTxDesc; + + uint32_t RxRingAddrLO; + uint32_t RxRingAddrHI; + + EEprom9346 eeprom; + + uint32_t TCTR; + uint32_t TimerInt; + int64_t TCTR_base; + + /* Tally counters */ + RTL8139TallyCounters tally_counters; + + /* Non-persistent data */ + uint8_t *cplus_txbuffer; + int cplus_txbuffer_len; + int cplus_txbuffer_offset; + + /* PCI interrupt timer */ + QEMUTimer *timer; + + MemoryRegion bar_io; + MemoryRegion bar_mem; + + /* Support migration to/from old versions */ + int rtl8139_mmio_io_addr_dummy; +} RTL8139State; + +/* Writes tally counters to memory via DMA */ +static void RTL8139TallyCounters_dma_write(RTL8139State *s, dma_addr_t tc_addr); + +static void rtl8139_set_next_tctr_time(RTL8139State *s); + +static void prom9346_decode_command(EEprom9346 *eeprom, uint8_t command) +{ + DPRINTF("eeprom command 0x%02x\n", command); + + switch (command & Chip9346_op_mask) + { + case Chip9346_op_read: + { + eeprom->address = command & EEPROM_9346_ADDR_MASK; + eeprom->output = eeprom->contents[eeprom->address]; + eeprom->eedo = 0; + eeprom->tick = 0; + eeprom->mode = Chip9346_data_read; + DPRINTF("eeprom read from address 0x%02x data=0x%04x\n", + eeprom->address, eeprom->output); + } + break; + + case Chip9346_op_write: + { + eeprom->address = command & EEPROM_9346_ADDR_MASK; + eeprom->input = 0; + eeprom->tick = 0; + eeprom->mode = Chip9346_none; /* Chip9346_data_write */ + DPRINTF("eeprom begin write to address 0x%02x\n", + eeprom->address); + } + break; + default: + eeprom->mode = Chip9346_none; + switch (command & Chip9346_op_ext_mask) + { + case Chip9346_op_write_enable: + DPRINTF("eeprom write enabled\n"); + break; + case Chip9346_op_write_all: + DPRINTF("eeprom begin write all\n"); + break; + case Chip9346_op_write_disable: + DPRINTF("eeprom write disabled\n"); + break; + } + break; + } +} + +static void prom9346_shift_clock(EEprom9346 *eeprom) +{ + int bit = eeprom->eedi?1:0; + + ++ eeprom->tick; + + DPRINTF("eeprom: tick %d eedi=%d eedo=%d\n", eeprom->tick, eeprom->eedi, + eeprom->eedo); + + switch (eeprom->mode) + { + case Chip9346_enter_command_mode: + if (bit) + { + eeprom->mode = Chip9346_read_command; + eeprom->tick = 0; + eeprom->input = 0; + DPRINTF("eeprom: +++ synchronized, begin command read\n"); + } + break; + + case Chip9346_read_command: + eeprom->input = (eeprom->input << 1) | (bit & 1); + if (eeprom->tick == 8) + { + prom9346_decode_command(eeprom, eeprom->input & 0xff); + } + break; + + case Chip9346_data_read: + eeprom->eedo = (eeprom->output & 0x8000)?1:0; + eeprom->output <<= 1; + if (eeprom->tick == 16) + { +#if 1 + // the FreeBSD drivers (rl and re) don't explicitly toggle + // CS between reads (or does setting Cfg9346 to 0 count too?), + // so we need to enter wait-for-command state here + eeprom->mode = Chip9346_enter_command_mode; + eeprom->input = 0; + eeprom->tick = 0; + + DPRINTF("eeprom: +++ end of read, awaiting next command\n"); +#else + // original behaviour + ++eeprom->address; + eeprom->address &= EEPROM_9346_ADDR_MASK; + eeprom->output = eeprom->contents[eeprom->address]; + eeprom->tick = 0; + + DPRINTF("eeprom: +++ read next address 0x%02x data=0x%04x\n", + eeprom->address, eeprom->output); +#endif + } + break; + + case Chip9346_data_write: + eeprom->input = (eeprom->input << 1) | (bit & 1); + if (eeprom->tick == 16) + { + DPRINTF("eeprom write to address 0x%02x data=0x%04x\n", + eeprom->address, eeprom->input); + + eeprom->contents[eeprom->address] = eeprom->input; + eeprom->mode = Chip9346_none; /* waiting for next command after CS cycle */ + eeprom->tick = 0; + eeprom->input = 0; + } + break; + + case Chip9346_data_write_all: + eeprom->input = (eeprom->input << 1) | (bit & 1); + if (eeprom->tick == 16) + { + int i; + for (i = 0; i < EEPROM_9346_SIZE; i++) + { + eeprom->contents[i] = eeprom->input; + } + DPRINTF("eeprom filled with data=0x%04x\n", eeprom->input); + + eeprom->mode = Chip9346_enter_command_mode; + eeprom->tick = 0; + eeprom->input = 0; + } + break; + + default: + break; + } +} + +static int prom9346_get_wire(RTL8139State *s) +{ + EEprom9346 *eeprom = &s->eeprom; + if (!eeprom->eecs) + return 0; + + return eeprom->eedo; +} + +/* FIXME: This should be merged into/replaced by eeprom93xx.c. */ +static void prom9346_set_wire(RTL8139State *s, int eecs, int eesk, int eedi) +{ + EEprom9346 *eeprom = &s->eeprom; + uint8_t old_eecs = eeprom->eecs; + uint8_t old_eesk = eeprom->eesk; + + eeprom->eecs = eecs; + eeprom->eesk = eesk; + eeprom->eedi = eedi; + + DPRINTF("eeprom: +++ wires CS=%d SK=%d DI=%d DO=%d\n", eeprom->eecs, + eeprom->eesk, eeprom->eedi, eeprom->eedo); + + if (!old_eecs && eecs) + { + /* Synchronize start */ + eeprom->tick = 0; + eeprom->input = 0; + eeprom->output = 0; + eeprom->mode = Chip9346_enter_command_mode; + + DPRINTF("=== eeprom: begin access, enter command mode\n"); + } + + if (!eecs) + { + DPRINTF("=== eeprom: end access\n"); + return; + } + + if (!old_eesk && eesk) + { + /* SK front rules */ + prom9346_shift_clock(eeprom); + } +} + +static void rtl8139_update_irq(RTL8139State *s) +{ + PCIDevice *d = PCI_DEVICE(s); + int isr; + isr = (s->IntrStatus & s->IntrMask) & 0xffff; + + DPRINTF("Set IRQ to %d (%04x %04x)\n", isr ? 1 : 0, s->IntrStatus, + s->IntrMask); + + pci_set_irq(d, (isr != 0)); +} + +static int rtl8139_RxWrap(RTL8139State *s) +{ + /* wrapping enabled; assume 1.5k more buffer space if size < 65536 */ + return (s->RxConfig & (1 << 7)); +} + +static int rtl8139_receiver_enabled(RTL8139State *s) +{ + return s->bChipCmdState & CmdRxEnb; +} + +static int rtl8139_transmitter_enabled(RTL8139State *s) +{ + return s->bChipCmdState & CmdTxEnb; +} + +static int rtl8139_cp_receiver_enabled(RTL8139State *s) +{ + return s->CpCmd & CPlusRxEnb; +} + +static int rtl8139_cp_transmitter_enabled(RTL8139State *s) +{ + return s->CpCmd & CPlusTxEnb; +} + +static void rtl8139_write_buffer(RTL8139State *s, const void *buf, int size) +{ + PCIDevice *d = PCI_DEVICE(s); + + if (s->RxBufAddr + size > s->RxBufferSize) + { + int wrapped = MOD2(s->RxBufAddr + size, s->RxBufferSize); + + /* write packet data */ + if (wrapped && !(s->RxBufferSize < 65536 && rtl8139_RxWrap(s))) + { + DPRINTF(">>> rx packet wrapped in buffer at %d\n", size - wrapped); + + if (size > wrapped) + { + pci_dma_write(d, s->RxBuf + s->RxBufAddr, + buf, size-wrapped); + } + + /* reset buffer pointer */ + s->RxBufAddr = 0; + + pci_dma_write(d, s->RxBuf + s->RxBufAddr, + buf + (size-wrapped), wrapped); + + s->RxBufAddr = wrapped; + + return; + } + } + + /* non-wrapping path or overwrapping enabled */ + pci_dma_write(d, s->RxBuf + s->RxBufAddr, buf, size); + + s->RxBufAddr += size; +} + +#define MIN_BUF_SIZE 60 +static inline dma_addr_t rtl8139_addr64(uint32_t low, uint32_t high) +{ + return low | ((uint64_t)high << 32); +} + +/* Workaround for buggy guest driver such as linux who allocates rx + * rings after the receiver were enabled. */ +static bool rtl8139_cp_rx_valid(RTL8139State *s) +{ + return !(s->RxRingAddrLO == 0 && s->RxRingAddrHI == 0); +} + +static int rtl8139_can_receive(NetClientState *nc) +{ + RTL8139State *s = qemu_get_nic_opaque(nc); + int avail; + + /* Receive (drop) packets if card is disabled. */ + if (!s->clock_enabled) + return 1; + if (!rtl8139_receiver_enabled(s)) + return 1; + + if (rtl8139_cp_receiver_enabled(s) && rtl8139_cp_rx_valid(s)) { + /* ??? Flow control not implemented in c+ mode. + This is a hack to work around slirp deficiencies anyway. */ + return 1; + } else { + avail = MOD2(s->RxBufferSize + s->RxBufPtr - s->RxBufAddr, + s->RxBufferSize); + return (avail == 0 || avail >= 1514 || (s->IntrMask & RxOverflow)); + } +} + +static ssize_t rtl8139_do_receive(NetClientState *nc, const uint8_t *buf, size_t size_, int do_interrupt) +{ + RTL8139State *s = qemu_get_nic_opaque(nc); + PCIDevice *d = PCI_DEVICE(s); + /* size is the length of the buffer passed to the driver */ + int size = size_; + const uint8_t *dot1q_buf = NULL; + + uint32_t packet_header = 0; + + uint8_t buf1[MIN_BUF_SIZE + VLAN_HLEN]; + static const uint8_t broadcast_macaddr[6] = + { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; + + DPRINTF(">>> received len=%d\n", size); + + /* test if board clock is stopped */ + if (!s->clock_enabled) + { + DPRINTF("stopped ==========================\n"); + return -1; + } + + /* first check if receiver is enabled */ + + if (!rtl8139_receiver_enabled(s)) + { + DPRINTF("receiver disabled ================\n"); + return -1; + } + + /* XXX: check this */ + if (s->RxConfig & AcceptAllPhys) { + /* promiscuous: receive all */ + DPRINTF(">>> packet received in promiscuous mode\n"); + + } else { + if (!memcmp(buf, broadcast_macaddr, 6)) { + /* broadcast address */ + if (!(s->RxConfig & AcceptBroadcast)) + { + DPRINTF(">>> broadcast packet rejected\n"); + + /* update tally counter */ + ++s->tally_counters.RxERR; + + return size; + } + + packet_header |= RxBroadcast; + + DPRINTF(">>> broadcast packet received\n"); + + /* update tally counter */ + ++s->tally_counters.RxOkBrd; + + } else if (buf[0] & 0x01) { + /* multicast */ + if (!(s->RxConfig & AcceptMulticast)) + { + DPRINTF(">>> multicast packet rejected\n"); + + /* update tally counter */ + ++s->tally_counters.RxERR; + + return size; + } + + int mcast_idx = compute_mcast_idx(buf); + + if (!(s->mult[mcast_idx >> 3] & (1 << (mcast_idx & 7)))) + { + DPRINTF(">>> multicast address mismatch\n"); + + /* update tally counter */ + ++s->tally_counters.RxERR; + + return size; + } + + packet_header |= RxMulticast; + + DPRINTF(">>> multicast packet received\n"); + + /* update tally counter */ + ++s->tally_counters.RxOkMul; + + } else if (s->phys[0] == buf[0] && + s->phys[1] == buf[1] && + s->phys[2] == buf[2] && + s->phys[3] == buf[3] && + s->phys[4] == buf[4] && + s->phys[5] == buf[5]) { + /* match */ + if (!(s->RxConfig & AcceptMyPhys)) + { + DPRINTF(">>> rejecting physical address matching packet\n"); + + /* update tally counter */ + ++s->tally_counters.RxERR; + + return size; + } + + packet_header |= RxPhysical; + + DPRINTF(">>> physical address matching packet received\n"); + + /* update tally counter */ + ++s->tally_counters.RxOkPhy; + + } else { + + DPRINTF(">>> unknown packet\n"); + + /* update tally counter */ + ++s->tally_counters.RxERR; + + return size; + } + } + + /* if too small buffer, then expand it + * Include some tailroom in case a vlan tag is later removed. */ + if (size < MIN_BUF_SIZE + VLAN_HLEN) { + memcpy(buf1, buf, size); + memset(buf1 + size, 0, MIN_BUF_SIZE + VLAN_HLEN - size); + buf = buf1; + if (size < MIN_BUF_SIZE) { + size = MIN_BUF_SIZE; + } + } + + if (rtl8139_cp_receiver_enabled(s)) + { + if (!rtl8139_cp_rx_valid(s)) { + return size; + } + + DPRINTF("in C+ Rx mode ================\n"); + + /* begin C+ receiver mode */ + +/* w0 ownership flag */ +#define CP_RX_OWN (1<<31) +/* w0 end of ring flag */ +#define CP_RX_EOR (1<<30) +/* w0 bits 0...12 : buffer size */ +#define CP_RX_BUFFER_SIZE_MASK ((1<<13) - 1) +/* w1 tag available flag */ +#define CP_RX_TAVA (1<<16) +/* w1 bits 0...15 : VLAN tag */ +#define CP_RX_VLAN_TAG_MASK ((1<<16) - 1) +/* w2 low 32bit of Rx buffer ptr */ +/* w3 high 32bit of Rx buffer ptr */ + + int descriptor = s->currCPlusRxDesc; + dma_addr_t cplus_rx_ring_desc; + + cplus_rx_ring_desc = rtl8139_addr64(s->RxRingAddrLO, s->RxRingAddrHI); + cplus_rx_ring_desc += 16 * descriptor; + + DPRINTF("+++ C+ mode reading RX descriptor %d from host memory at " + "%08x %08x = "DMA_ADDR_FMT"\n", descriptor, s->RxRingAddrHI, + s->RxRingAddrLO, cplus_rx_ring_desc); + + uint32_t val, rxdw0,rxdw1,rxbufLO,rxbufHI; + + pci_dma_read(d, cplus_rx_ring_desc, &val, 4); + rxdw0 = le32_to_cpu(val); + pci_dma_read(d, cplus_rx_ring_desc+4, &val, 4); + rxdw1 = le32_to_cpu(val); + pci_dma_read(d, cplus_rx_ring_desc+8, &val, 4); + rxbufLO = le32_to_cpu(val); + pci_dma_read(d, cplus_rx_ring_desc+12, &val, 4); + rxbufHI = le32_to_cpu(val); + + DPRINTF("+++ C+ mode RX descriptor %d %08x %08x %08x %08x\n", + descriptor, rxdw0, rxdw1, rxbufLO, rxbufHI); + + if (!(rxdw0 & CP_RX_OWN)) + { + DPRINTF("C+ Rx mode : descriptor %d is owned by host\n", + descriptor); + + s->IntrStatus |= RxOverflow; + ++s->RxMissed; + + /* update tally counter */ + ++s->tally_counters.RxERR; + ++s->tally_counters.MissPkt; + + rtl8139_update_irq(s); + return size_; + } + + uint32_t rx_space = rxdw0 & CP_RX_BUFFER_SIZE_MASK; + + /* write VLAN info to descriptor variables. */ + if (s->CpCmd & CPlusRxVLAN && be16_to_cpup((uint16_t *) + &buf[ETH_ALEN * 2]) == ETH_P_VLAN) { + dot1q_buf = &buf[ETH_ALEN * 2]; + size -= VLAN_HLEN; + /* if too small buffer, use the tailroom added duing expansion */ + if (size < MIN_BUF_SIZE) { + size = MIN_BUF_SIZE; + } + + rxdw1 &= ~CP_RX_VLAN_TAG_MASK; + /* BE + ~le_to_cpu()~ + cpu_to_le() = BE */ + rxdw1 |= CP_RX_TAVA | le16_to_cpup((uint16_t *) + &dot1q_buf[ETHER_TYPE_LEN]); + + DPRINTF("C+ Rx mode : extracted vlan tag with tci: ""%u\n", + be16_to_cpup((uint16_t *)&dot1q_buf[ETHER_TYPE_LEN])); + } else { + /* reset VLAN tag flag */ + rxdw1 &= ~CP_RX_TAVA; + } + + /* TODO: scatter the packet over available receive ring descriptors space */ + + if (size+4 > rx_space) + { + DPRINTF("C+ Rx mode : descriptor %d size %d received %d + 4\n", + descriptor, rx_space, size); + + s->IntrStatus |= RxOverflow; + ++s->RxMissed; + + /* update tally counter */ + ++s->tally_counters.RxERR; + ++s->tally_counters.MissPkt; + + rtl8139_update_irq(s); + return size_; + } + + dma_addr_t rx_addr = rtl8139_addr64(rxbufLO, rxbufHI); + + /* receive/copy to target memory */ + if (dot1q_buf) { + pci_dma_write(d, rx_addr, buf, 2 * ETH_ALEN); + pci_dma_write(d, rx_addr + 2 * ETH_ALEN, + buf + 2 * ETH_ALEN + VLAN_HLEN, + size - 2 * ETH_ALEN); + } else { + pci_dma_write(d, rx_addr, buf, size); + } + + if (s->CpCmd & CPlusRxChkSum) + { + /* do some packet checksumming */ + } + + /* write checksum */ + val = cpu_to_le32(crc32(0, buf, size_)); + pci_dma_write(d, rx_addr+size, (uint8_t *)&val, 4); + +/* first segment of received packet flag */ +#define CP_RX_STATUS_FS (1<<29) +/* last segment of received packet flag */ +#define CP_RX_STATUS_LS (1<<28) +/* multicast packet flag */ +#define CP_RX_STATUS_MAR (1<<26) +/* physical-matching packet flag */ +#define CP_RX_STATUS_PAM (1<<25) +/* broadcast packet flag */ +#define CP_RX_STATUS_BAR (1<<24) +/* runt packet flag */ +#define CP_RX_STATUS_RUNT (1<<19) +/* crc error flag */ +#define CP_RX_STATUS_CRC (1<<18) +/* IP checksum error flag */ +#define CP_RX_STATUS_IPF (1<<15) +/* UDP checksum error flag */ +#define CP_RX_STATUS_UDPF (1<<14) +/* TCP checksum error flag */ +#define CP_RX_STATUS_TCPF (1<<13) + + /* transfer ownership to target */ + rxdw0 &= ~CP_RX_OWN; + + /* set first segment bit */ + rxdw0 |= CP_RX_STATUS_FS; + + /* set last segment bit */ + rxdw0 |= CP_RX_STATUS_LS; + + /* set received packet type flags */ + if (packet_header & RxBroadcast) + rxdw0 |= CP_RX_STATUS_BAR; + if (packet_header & RxMulticast) + rxdw0 |= CP_RX_STATUS_MAR; + if (packet_header & RxPhysical) + rxdw0 |= CP_RX_STATUS_PAM; + + /* set received size */ + rxdw0 &= ~CP_RX_BUFFER_SIZE_MASK; + rxdw0 |= (size+4); + + /* update ring data */ + val = cpu_to_le32(rxdw0); + pci_dma_write(d, cplus_rx_ring_desc, (uint8_t *)&val, 4); + val = cpu_to_le32(rxdw1); + pci_dma_write(d, cplus_rx_ring_desc+4, (uint8_t *)&val, 4); + + /* update tally counter */ + ++s->tally_counters.RxOk; + + /* seek to next Rx descriptor */ + if (rxdw0 & CP_RX_EOR) + { + s->currCPlusRxDesc = 0; + } + else + { + ++s->currCPlusRxDesc; + } + + DPRINTF("done C+ Rx mode ----------------\n"); + + } + else + { + DPRINTF("in ring Rx mode ================\n"); + + /* begin ring receiver mode */ + int avail = MOD2(s->RxBufferSize + s->RxBufPtr - s->RxBufAddr, s->RxBufferSize); + + /* if receiver buffer is empty then avail == 0 */ + +#define RX_ALIGN(x) (((x) + 3) & ~0x3) + + if (avail != 0 && RX_ALIGN(size + 8) >= avail) + { + DPRINTF("rx overflow: rx buffer length %d head 0x%04x " + "read 0x%04x === available 0x%04x need 0x%04x\n", + s->RxBufferSize, s->RxBufAddr, s->RxBufPtr, avail, size + 8); + + s->IntrStatus |= RxOverflow; + ++s->RxMissed; + rtl8139_update_irq(s); + return 0; + } + + packet_header |= RxStatusOK; + + packet_header |= (((size+4) << 16) & 0xffff0000); + + /* write header */ + uint32_t val = cpu_to_le32(packet_header); + + rtl8139_write_buffer(s, (uint8_t *)&val, 4); + + rtl8139_write_buffer(s, buf, size); + + /* write checksum */ + val = cpu_to_le32(crc32(0, buf, size)); + rtl8139_write_buffer(s, (uint8_t *)&val, 4); + + /* correct buffer write pointer */ + s->RxBufAddr = MOD2(RX_ALIGN(s->RxBufAddr), s->RxBufferSize); + + /* now we can signal we have received something */ + + DPRINTF("received: rx buffer length %d head 0x%04x read 0x%04x\n", + s->RxBufferSize, s->RxBufAddr, s->RxBufPtr); + } + + s->IntrStatus |= RxOK; + + if (do_interrupt) + { + rtl8139_update_irq(s); + } + + return size_; +} + +static ssize_t rtl8139_receive(NetClientState *nc, const uint8_t *buf, size_t size) +{ + return rtl8139_do_receive(nc, buf, size, 1); +} + +static void rtl8139_reset_rxring(RTL8139State *s, uint32_t bufferSize) +{ + s->RxBufferSize = bufferSize; + s->RxBufPtr = 0; + s->RxBufAddr = 0; +} + +static void rtl8139_reset(DeviceState *d) +{ + RTL8139State *s = RTL8139(d); + int i; + + /* restore MAC address */ + memcpy(s->phys, s->conf.macaddr.a, 6); + qemu_format_nic_info_str(qemu_get_queue(s->nic), s->phys); + + /* reset interrupt mask */ + s->IntrStatus = 0; + s->IntrMask = 0; + + rtl8139_update_irq(s); + + /* mark all status registers as owned by host */ + for (i = 0; i < 4; ++i) + { + s->TxStatus[i] = TxHostOwns; + } + + s->currTxDesc = 0; + s->currCPlusRxDesc = 0; + s->currCPlusTxDesc = 0; + + s->RxRingAddrLO = 0; + s->RxRingAddrHI = 0; + + s->RxBuf = 0; + + rtl8139_reset_rxring(s, 8192); + + /* ACK the reset */ + s->TxConfig = 0; + +#if 0 +// s->TxConfig |= HW_REVID(1, 0, 0, 0, 0, 0, 0); // RTL-8139 HasHltClk + s->clock_enabled = 0; +#else + s->TxConfig |= HW_REVID(1, 1, 1, 0, 1, 1, 0); // RTL-8139C+ HasLWake + s->clock_enabled = 1; +#endif + + s->bChipCmdState = CmdReset; /* RxBufEmpty bit is calculated on read from ChipCmd */; + + /* set initial state data */ + s->Config0 = 0x0; /* No boot ROM */ + s->Config1 = 0xC; /* IO mapped and MEM mapped registers available */ + s->Config3 = 0x1; /* fast back-to-back compatible */ + s->Config5 = 0x0; + + s->CSCR = CSCR_F_LINK_100 | CSCR_HEART_BIT | CSCR_LD; + + s->CpCmd = 0x0; /* reset C+ mode */ + s->cplus_enabled = 0; + + +// s->BasicModeCtrl = 0x3100; // 100Mbps, full duplex, autonegotiation +// s->BasicModeCtrl = 0x2100; // 100Mbps, full duplex + s->BasicModeCtrl = 0x1000; // autonegotiation + + s->BasicModeStatus = 0x7809; + //s->BasicModeStatus |= 0x0040; /* UTP medium */ + s->BasicModeStatus |= 0x0020; /* autonegotiation completed */ + /* preserve link state */ + s->BasicModeStatus |= qemu_get_queue(s->nic)->link_down ? 0 : 0x04; + + s->NWayAdvert = 0x05e1; /* all modes, full duplex */ + s->NWayLPAR = 0x05e1; /* all modes, full duplex */ + s->NWayExpansion = 0x0001; /* autonegotiation supported */ + + /* also reset timer and disable timer interrupt */ + s->TCTR = 0; + s->TimerInt = 0; + s->TCTR_base = 0; + rtl8139_set_next_tctr_time(s); + + /* reset tally counters */ + RTL8139TallyCounters_clear(&s->tally_counters); +} + +static void RTL8139TallyCounters_clear(RTL8139TallyCounters* counters) +{ + counters->TxOk = 0; + counters->RxOk = 0; + counters->TxERR = 0; + counters->RxERR = 0; + counters->MissPkt = 0; + counters->FAE = 0; + counters->Tx1Col = 0; + counters->TxMCol = 0; + counters->RxOkPhy = 0; + counters->RxOkBrd = 0; + counters->RxOkMul = 0; + counters->TxAbt = 0; + counters->TxUndrn = 0; +} + +static void RTL8139TallyCounters_dma_write(RTL8139State *s, dma_addr_t tc_addr) +{ + PCIDevice *d = PCI_DEVICE(s); + RTL8139TallyCounters *tally_counters = &s->tally_counters; + uint16_t val16; + uint32_t val32; + uint64_t val64; + + val64 = cpu_to_le64(tally_counters->TxOk); + pci_dma_write(d, tc_addr + 0, (uint8_t *)&val64, 8); + + val64 = cpu_to_le64(tally_counters->RxOk); + pci_dma_write(d, tc_addr + 8, (uint8_t *)&val64, 8); + + val64 = cpu_to_le64(tally_counters->TxERR); + pci_dma_write(d, tc_addr + 16, (uint8_t *)&val64, 8); + + val32 = cpu_to_le32(tally_counters->RxERR); + pci_dma_write(d, tc_addr + 24, (uint8_t *)&val32, 4); + + val16 = cpu_to_le16(tally_counters->MissPkt); + pci_dma_write(d, tc_addr + 28, (uint8_t *)&val16, 2); + + val16 = cpu_to_le16(tally_counters->FAE); + pci_dma_write(d, tc_addr + 30, (uint8_t *)&val16, 2); + + val32 = cpu_to_le32(tally_counters->Tx1Col); + pci_dma_write(d, tc_addr + 32, (uint8_t *)&val32, 4); + + val32 = cpu_to_le32(tally_counters->TxMCol); + pci_dma_write(d, tc_addr + 36, (uint8_t *)&val32, 4); + + val64 = cpu_to_le64(tally_counters->RxOkPhy); + pci_dma_write(d, tc_addr + 40, (uint8_t *)&val64, 8); + + val64 = cpu_to_le64(tally_counters->RxOkBrd); + pci_dma_write(d, tc_addr + 48, (uint8_t *)&val64, 8); + + val32 = cpu_to_le32(tally_counters->RxOkMul); + pci_dma_write(d, tc_addr + 56, (uint8_t *)&val32, 4); + + val16 = cpu_to_le16(tally_counters->TxAbt); + pci_dma_write(d, tc_addr + 60, (uint8_t *)&val16, 2); + + val16 = cpu_to_le16(tally_counters->TxUndrn); + pci_dma_write(d, tc_addr + 62, (uint8_t *)&val16, 2); +} + +/* Loads values of tally counters from VM state file */ + +static const VMStateDescription vmstate_tally_counters = { + .name = "tally_counters", + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_UINT64(TxOk, RTL8139TallyCounters), + VMSTATE_UINT64(RxOk, RTL8139TallyCounters), + VMSTATE_UINT64(TxERR, RTL8139TallyCounters), + VMSTATE_UINT32(RxERR, RTL8139TallyCounters), + VMSTATE_UINT16(MissPkt, RTL8139TallyCounters), + VMSTATE_UINT16(FAE, RTL8139TallyCounters), + VMSTATE_UINT32(Tx1Col, RTL8139TallyCounters), + VMSTATE_UINT32(TxMCol, RTL8139TallyCounters), + VMSTATE_UINT64(RxOkPhy, RTL8139TallyCounters), + VMSTATE_UINT64(RxOkBrd, RTL8139TallyCounters), + VMSTATE_UINT16(TxAbt, RTL8139TallyCounters), + VMSTATE_UINT16(TxUndrn, RTL8139TallyCounters), + VMSTATE_END_OF_LIST() + } +}; + +static void rtl8139_ChipCmd_write(RTL8139State *s, uint32_t val) +{ + DeviceState *d = DEVICE(s); + + val &= 0xff; + + DPRINTF("ChipCmd write val=0x%08x\n", val); + + if (val & CmdReset) + { + DPRINTF("ChipCmd reset\n"); + rtl8139_reset(d); + } + if (val & CmdRxEnb) + { + DPRINTF("ChipCmd enable receiver\n"); + + s->currCPlusRxDesc = 0; + } + if (val & CmdTxEnb) + { + DPRINTF("ChipCmd enable transmitter\n"); + + s->currCPlusTxDesc = 0; + } + + /* mask unwritable bits */ + val = SET_MASKED(val, 0xe3, s->bChipCmdState); + + /* Deassert reset pin before next read */ + val &= ~CmdReset; + + s->bChipCmdState = val; +} + +static int rtl8139_RxBufferEmpty(RTL8139State *s) +{ + int unread = MOD2(s->RxBufferSize + s->RxBufAddr - s->RxBufPtr, s->RxBufferSize); + + if (unread != 0) + { + DPRINTF("receiver buffer data available 0x%04x\n", unread); + return 0; + } + + DPRINTF("receiver buffer is empty\n"); + + return 1; +} + +static uint32_t rtl8139_ChipCmd_read(RTL8139State *s) +{ + uint32_t ret = s->bChipCmdState; + + if (rtl8139_RxBufferEmpty(s)) + ret |= RxBufEmpty; + + DPRINTF("ChipCmd read val=0x%04x\n", ret); + + return ret; +} + +static void rtl8139_CpCmd_write(RTL8139State *s, uint32_t val) +{ + val &= 0xffff; + + DPRINTF("C+ command register write(w) val=0x%04x\n", val); + + s->cplus_enabled = 1; + + /* mask unwritable bits */ + val = SET_MASKED(val, 0xff84, s->CpCmd); + + s->CpCmd = val; +} + +static uint32_t rtl8139_CpCmd_read(RTL8139State *s) +{ + uint32_t ret = s->CpCmd; + + DPRINTF("C+ command register read(w) val=0x%04x\n", ret); + + return ret; +} + +static void rtl8139_IntrMitigate_write(RTL8139State *s, uint32_t val) +{ + DPRINTF("C+ IntrMitigate register write(w) val=0x%04x\n", val); +} + +static uint32_t rtl8139_IntrMitigate_read(RTL8139State *s) +{ + uint32_t ret = 0; + + DPRINTF("C+ IntrMitigate register read(w) val=0x%04x\n", ret); + + return ret; +} + +static int rtl8139_config_writable(RTL8139State *s) +{ + if ((s->Cfg9346 & Chip9346_op_mask) == Cfg9346_ConfigWrite) + { + return 1; + } + + DPRINTF("Configuration registers are write-protected\n"); + + return 0; +} + +static void rtl8139_BasicModeCtrl_write(RTL8139State *s, uint32_t val) +{ + val &= 0xffff; + + DPRINTF("BasicModeCtrl register write(w) val=0x%04x\n", val); + + /* mask unwritable bits */ + uint32_t mask = 0x4cff; + + if (1 || !rtl8139_config_writable(s)) + { + /* Speed setting and autonegotiation enable bits are read-only */ + mask |= 0x3000; + /* Duplex mode setting is read-only */ + mask |= 0x0100; + } + + val = SET_MASKED(val, mask, s->BasicModeCtrl); + + s->BasicModeCtrl = val; +} + +static uint32_t rtl8139_BasicModeCtrl_read(RTL8139State *s) +{ + uint32_t ret = s->BasicModeCtrl; + + DPRINTF("BasicModeCtrl register read(w) val=0x%04x\n", ret); + + return ret; +} + +static void rtl8139_BasicModeStatus_write(RTL8139State *s, uint32_t val) +{ + val &= 0xffff; + + DPRINTF("BasicModeStatus register write(w) val=0x%04x\n", val); + + /* mask unwritable bits */ + val = SET_MASKED(val, 0xff3f, s->BasicModeStatus); + + s->BasicModeStatus = val; +} + +static uint32_t rtl8139_BasicModeStatus_read(RTL8139State *s) +{ + uint32_t ret = s->BasicModeStatus; + + DPRINTF("BasicModeStatus register read(w) val=0x%04x\n", ret); + + return ret; +} + +static void rtl8139_Cfg9346_write(RTL8139State *s, uint32_t val) +{ + DeviceState *d = DEVICE(s); + + val &= 0xff; + + DPRINTF("Cfg9346 write val=0x%02x\n", val); + + /* mask unwritable bits */ + val = SET_MASKED(val, 0x31, s->Cfg9346); + + uint32_t opmode = val & 0xc0; + uint32_t eeprom_val = val & 0xf; + + if (opmode == 0x80) { + /* eeprom access */ + int eecs = (eeprom_val & 0x08)?1:0; + int eesk = (eeprom_val & 0x04)?1:0; + int eedi = (eeprom_val & 0x02)?1:0; + prom9346_set_wire(s, eecs, eesk, eedi); + } else if (opmode == 0x40) { + /* Reset. */ + val = 0; + rtl8139_reset(d); + } + + s->Cfg9346 = val; +} + +static uint32_t rtl8139_Cfg9346_read(RTL8139State *s) +{ + uint32_t ret = s->Cfg9346; + + uint32_t opmode = ret & 0xc0; + + if (opmode == 0x80) + { + /* eeprom access */ + int eedo = prom9346_get_wire(s); + if (eedo) + { + ret |= 0x01; + } + else + { + ret &= ~0x01; + } + } + + DPRINTF("Cfg9346 read val=0x%02x\n", ret); + + return ret; +} + +static void rtl8139_Config0_write(RTL8139State *s, uint32_t val) +{ + val &= 0xff; + + DPRINTF("Config0 write val=0x%02x\n", val); + + if (!rtl8139_config_writable(s)) { + return; + } + + /* mask unwritable bits */ + val = SET_MASKED(val, 0xf8, s->Config0); + + s->Config0 = val; +} + +static uint32_t rtl8139_Config0_read(RTL8139State *s) +{ + uint32_t ret = s->Config0; + + DPRINTF("Config0 read val=0x%02x\n", ret); + + return ret; +} + +static void rtl8139_Config1_write(RTL8139State *s, uint32_t val) +{ + val &= 0xff; + + DPRINTF("Config1 write val=0x%02x\n", val); + + if (!rtl8139_config_writable(s)) { + return; + } + + /* mask unwritable bits */ + val = SET_MASKED(val, 0xC, s->Config1); + + s->Config1 = val; +} + +static uint32_t rtl8139_Config1_read(RTL8139State *s) +{ + uint32_t ret = s->Config1; + + DPRINTF("Config1 read val=0x%02x\n", ret); + + return ret; +} + +static void rtl8139_Config3_write(RTL8139State *s, uint32_t val) +{ + val &= 0xff; + + DPRINTF("Config3 write val=0x%02x\n", val); + + if (!rtl8139_config_writable(s)) { + return; + } + + /* mask unwritable bits */ + val = SET_MASKED(val, 0x8F, s->Config3); + + s->Config3 = val; +} + +static uint32_t rtl8139_Config3_read(RTL8139State *s) +{ + uint32_t ret = s->Config3; + + DPRINTF("Config3 read val=0x%02x\n", ret); + + return ret; +} + +static void rtl8139_Config4_write(RTL8139State *s, uint32_t val) +{ + val &= 0xff; + + DPRINTF("Config4 write val=0x%02x\n", val); + + if (!rtl8139_config_writable(s)) { + return; + } + + /* mask unwritable bits */ + val = SET_MASKED(val, 0x0a, s->Config4); + + s->Config4 = val; +} + +static uint32_t rtl8139_Config4_read(RTL8139State *s) +{ + uint32_t ret = s->Config4; + + DPRINTF("Config4 read val=0x%02x\n", ret); + + return ret; +} + +static void rtl8139_Config5_write(RTL8139State *s, uint32_t val) +{ + val &= 0xff; + + DPRINTF("Config5 write val=0x%02x\n", val); + + /* mask unwritable bits */ + val = SET_MASKED(val, 0x80, s->Config5); + + s->Config5 = val; +} + +static uint32_t rtl8139_Config5_read(RTL8139State *s) +{ + uint32_t ret = s->Config5; + + DPRINTF("Config5 read val=0x%02x\n", ret); + + return ret; +} + +static void rtl8139_TxConfig_write(RTL8139State *s, uint32_t val) +{ + if (!rtl8139_transmitter_enabled(s)) + { + DPRINTF("transmitter disabled; no TxConfig write val=0x%08x\n", val); + return; + } + + DPRINTF("TxConfig write val=0x%08x\n", val); + + val = SET_MASKED(val, TxVersionMask | 0x8070f80f, s->TxConfig); + + s->TxConfig = val; +} + +static void rtl8139_TxConfig_writeb(RTL8139State *s, uint32_t val) +{ + DPRINTF("RTL8139C TxConfig via write(b) val=0x%02x\n", val); + + uint32_t tc = s->TxConfig; + tc &= 0xFFFFFF00; + tc |= (val & 0x000000FF); + rtl8139_TxConfig_write(s, tc); +} + +static uint32_t rtl8139_TxConfig_read(RTL8139State *s) +{ + uint32_t ret = s->TxConfig; + + DPRINTF("TxConfig read val=0x%04x\n", ret); + + return ret; +} + +static void rtl8139_RxConfig_write(RTL8139State *s, uint32_t val) +{ + DPRINTF("RxConfig write val=0x%08x\n", val); + + /* mask unwritable bits */ + val = SET_MASKED(val, 0xf0fc0040, s->RxConfig); + + s->RxConfig = val; + + /* reset buffer size and read/write pointers */ + rtl8139_reset_rxring(s, 8192 << ((s->RxConfig >> 11) & 0x3)); + + DPRINTF("RxConfig write reset buffer size to %d\n", s->RxBufferSize); +} + +static uint32_t rtl8139_RxConfig_read(RTL8139State *s) +{ + uint32_t ret = s->RxConfig; + + DPRINTF("RxConfig read val=0x%08x\n", ret); + + return ret; +} + +static void rtl8139_transfer_frame(RTL8139State *s, uint8_t *buf, int size, + int do_interrupt, const uint8_t *dot1q_buf) +{ + struct iovec *iov = NULL; + struct iovec vlan_iov[3]; + + if (!size) + { + DPRINTF("+++ empty ethernet frame\n"); + return; + } + + if (dot1q_buf && size >= ETH_ALEN * 2) { + iov = (struct iovec[3]) { + { .iov_base = buf, .iov_len = ETH_ALEN * 2 }, + { .iov_base = (void *) dot1q_buf, .iov_len = VLAN_HLEN }, + { .iov_base = buf + ETH_ALEN * 2, + .iov_len = size - ETH_ALEN * 2 }, + }; + + memcpy(vlan_iov, iov, sizeof(vlan_iov)); + iov = vlan_iov; + } + + if (TxLoopBack == (s->TxConfig & TxLoopBack)) + { + size_t buf2_size; + uint8_t *buf2; + + if (iov) { + buf2_size = iov_size(iov, 3); + buf2 = g_malloc(buf2_size); + iov_to_buf(iov, 3, 0, buf2, buf2_size); + buf = buf2; + } + + DPRINTF("+++ transmit loopback mode\n"); + rtl8139_do_receive(qemu_get_queue(s->nic), buf, size, do_interrupt); + + if (iov) { + g_free(buf2); + } + } + else + { + if (iov) { + qemu_sendv_packet(qemu_get_queue(s->nic), iov, 3); + } else { + qemu_send_packet(qemu_get_queue(s->nic), buf, size); + } + } +} + +static int rtl8139_transmit_one(RTL8139State *s, int descriptor) +{ + if (!rtl8139_transmitter_enabled(s)) + { + DPRINTF("+++ cannot transmit from descriptor %d: transmitter " + "disabled\n", descriptor); + return 0; + } + + if (s->TxStatus[descriptor] & TxHostOwns) + { + DPRINTF("+++ cannot transmit from descriptor %d: owned by host " + "(%08x)\n", descriptor, s->TxStatus[descriptor]); + return 0; + } + + DPRINTF("+++ transmitting from descriptor %d\n", descriptor); + + PCIDevice *d = PCI_DEVICE(s); + int txsize = s->TxStatus[descriptor] & 0x1fff; + uint8_t txbuffer[0x2000]; + + DPRINTF("+++ transmit reading %d bytes from host memory at 0x%08x\n", + txsize, s->TxAddr[descriptor]); + + pci_dma_read(d, s->TxAddr[descriptor], txbuffer, txsize); + + /* Mark descriptor as transferred */ + s->TxStatus[descriptor] |= TxHostOwns; + s->TxStatus[descriptor] |= TxStatOK; + + rtl8139_transfer_frame(s, txbuffer, txsize, 0, NULL); + + DPRINTF("+++ transmitted %d bytes from descriptor %d\n", txsize, + descriptor); + + /* update interrupt */ + s->IntrStatus |= TxOK; + rtl8139_update_irq(s); + + return 1; +} + +/* structures and macros for task offloading */ +#define TCP_HEADER_DATA_OFFSET(tcp) (((be16_to_cpu(tcp->th_offset_flags) >> 12)&0xf) << 2) +#define TCP_FLAGS_ONLY(flags) ((flags)&0x3f) +#define TCP_HEADER_FLAGS(tcp) TCP_FLAGS_ONLY(be16_to_cpu(tcp->th_offset_flags)) + +#define TCP_HEADER_CLEAR_FLAGS(tcp, off) ((tcp)->th_offset_flags &= cpu_to_be16(~TCP_FLAGS_ONLY(off))) + +/* produces ones' complement sum of data */ +static uint16_t ones_complement_sum(uint8_t *data, size_t len) +{ + uint32_t result = 0; + + for (; len > 1; data+=2, len-=2) + { + result += *(uint16_t*)data; + } + + /* add the remainder byte */ + if (len) + { + uint8_t odd[2] = {*data, 0}; + result += *(uint16_t*)odd; + } + + while (result>>16) + result = (result & 0xffff) + (result >> 16); + + return result; +} + +static uint16_t ip_checksum(void *data, size_t len) +{ + return ~ones_complement_sum((uint8_t*)data, len); +} + +static int rtl8139_cplus_transmit_one(RTL8139State *s) +{ + if (!rtl8139_transmitter_enabled(s)) + { + DPRINTF("+++ C+ mode: transmitter disabled\n"); + return 0; + } + + if (!rtl8139_cp_transmitter_enabled(s)) + { + DPRINTF("+++ C+ mode: C+ transmitter disabled\n"); + return 0 ; + } + + PCIDevice *d = PCI_DEVICE(s); + int descriptor = s->currCPlusTxDesc; + + dma_addr_t cplus_tx_ring_desc = rtl8139_addr64(s->TxAddr[0], s->TxAddr[1]); + + /* Normal priority ring */ + cplus_tx_ring_desc += 16 * descriptor; + + DPRINTF("+++ C+ mode reading TX descriptor %d from host memory at " + "%08x %08x = 0x"DMA_ADDR_FMT"\n", descriptor, s->TxAddr[1], + s->TxAddr[0], cplus_tx_ring_desc); + + uint32_t val, txdw0,txdw1,txbufLO,txbufHI; + + pci_dma_read(d, cplus_tx_ring_desc, (uint8_t *)&val, 4); + txdw0 = le32_to_cpu(val); + pci_dma_read(d, cplus_tx_ring_desc+4, (uint8_t *)&val, 4); + txdw1 = le32_to_cpu(val); + pci_dma_read(d, cplus_tx_ring_desc+8, (uint8_t *)&val, 4); + txbufLO = le32_to_cpu(val); + pci_dma_read(d, cplus_tx_ring_desc+12, (uint8_t *)&val, 4); + txbufHI = le32_to_cpu(val); + + DPRINTF("+++ C+ mode TX descriptor %d %08x %08x %08x %08x\n", descriptor, + txdw0, txdw1, txbufLO, txbufHI); + +/* w0 ownership flag */ +#define CP_TX_OWN (1<<31) +/* w0 end of ring flag */ +#define CP_TX_EOR (1<<30) +/* first segment of received packet flag */ +#define CP_TX_FS (1<<29) +/* last segment of received packet flag */ +#define CP_TX_LS (1<<28) +/* large send packet flag */ +#define CP_TX_LGSEN (1<<27) +/* large send MSS mask, bits 16...25 */ +#define CP_TC_LGSEN_MSS_MASK ((1 << 12) - 1) + +/* IP checksum offload flag */ +#define CP_TX_IPCS (1<<18) +/* UDP checksum offload flag */ +#define CP_TX_UDPCS (1<<17) +/* TCP checksum offload flag */ +#define CP_TX_TCPCS (1<<16) + +/* w0 bits 0...15 : buffer size */ +#define CP_TX_BUFFER_SIZE (1<<16) +#define CP_TX_BUFFER_SIZE_MASK (CP_TX_BUFFER_SIZE - 1) +/* w1 add tag flag */ +#define CP_TX_TAGC (1<<17) +/* w1 bits 0...15 : VLAN tag (big endian) */ +#define CP_TX_VLAN_TAG_MASK ((1<<16) - 1) +/* w2 low 32bit of Rx buffer ptr */ +/* w3 high 32bit of Rx buffer ptr */ + +/* set after transmission */ +/* FIFO underrun flag */ +#define CP_TX_STATUS_UNF (1<<25) +/* transmit error summary flag, valid if set any of three below */ +#define CP_TX_STATUS_TES (1<<23) +/* out-of-window collision flag */ +#define CP_TX_STATUS_OWC (1<<22) +/* link failure flag */ +#define CP_TX_STATUS_LNKF (1<<21) +/* excessive collisions flag */ +#define CP_TX_STATUS_EXC (1<<20) + + if (!(txdw0 & CP_TX_OWN)) + { + DPRINTF("C+ Tx mode : descriptor %d is owned by host\n", descriptor); + return 0 ; + } + + DPRINTF("+++ C+ Tx mode : transmitting from descriptor %d\n", descriptor); + + if (txdw0 & CP_TX_FS) + { + DPRINTF("+++ C+ Tx mode : descriptor %d is first segment " + "descriptor\n", descriptor); + + /* reset internal buffer offset */ + s->cplus_txbuffer_offset = 0; + } + + int txsize = txdw0 & CP_TX_BUFFER_SIZE_MASK; + dma_addr_t tx_addr = rtl8139_addr64(txbufLO, txbufHI); + + /* make sure we have enough space to assemble the packet */ + if (!s->cplus_txbuffer) + { + s->cplus_txbuffer_len = CP_TX_BUFFER_SIZE; + s->cplus_txbuffer = g_malloc(s->cplus_txbuffer_len); + s->cplus_txbuffer_offset = 0; + + DPRINTF("+++ C+ mode transmission buffer allocated space %d\n", + s->cplus_txbuffer_len); + } + + if (s->cplus_txbuffer_offset + txsize >= s->cplus_txbuffer_len) + { + /* The spec didn't tell the maximum size, stick to CP_TX_BUFFER_SIZE */ + txsize = s->cplus_txbuffer_len - s->cplus_txbuffer_offset; + DPRINTF("+++ C+ mode transmission buffer overrun, truncated descriptor" + "length to %d\n", txsize); + } + + /* append more data to the packet */ + + DPRINTF("+++ C+ mode transmit reading %d bytes from host memory at " + DMA_ADDR_FMT" to offset %d\n", txsize, tx_addr, + s->cplus_txbuffer_offset); + + pci_dma_read(d, tx_addr, + s->cplus_txbuffer + s->cplus_txbuffer_offset, txsize); + s->cplus_txbuffer_offset += txsize; + + /* seek to next Rx descriptor */ + if (txdw0 & CP_TX_EOR) + { + s->currCPlusTxDesc = 0; + } + else + { + ++s->currCPlusTxDesc; + if (s->currCPlusTxDesc >= 64) + s->currCPlusTxDesc = 0; + } + + /* transfer ownership to target */ + txdw0 &= ~CP_RX_OWN; + + /* reset error indicator bits */ + txdw0 &= ~CP_TX_STATUS_UNF; + txdw0 &= ~CP_TX_STATUS_TES; + txdw0 &= ~CP_TX_STATUS_OWC; + txdw0 &= ~CP_TX_STATUS_LNKF; + txdw0 &= ~CP_TX_STATUS_EXC; + + /* update ring data */ + val = cpu_to_le32(txdw0); + pci_dma_write(d, cplus_tx_ring_desc, (uint8_t *)&val, 4); + + /* Now decide if descriptor being processed is holding the last segment of packet */ + if (txdw0 & CP_TX_LS) + { + uint8_t dot1q_buffer_space[VLAN_HLEN]; + uint16_t *dot1q_buffer; + + DPRINTF("+++ C+ Tx mode : descriptor %d is last segment descriptor\n", + descriptor); + + /* can transfer fully assembled packet */ + + uint8_t *saved_buffer = s->cplus_txbuffer; + int saved_size = s->cplus_txbuffer_offset; + int saved_buffer_len = s->cplus_txbuffer_len; + + /* create vlan tag */ + if (txdw1 & CP_TX_TAGC) { + /* the vlan tag is in BE byte order in the descriptor + * BE + le_to_cpu() + ~swap()~ = cpu */ + DPRINTF("+++ C+ Tx mode : inserting vlan tag with ""tci: %u\n", + bswap16(txdw1 & CP_TX_VLAN_TAG_MASK)); + + dot1q_buffer = (uint16_t *) dot1q_buffer_space; + dot1q_buffer[0] = cpu_to_be16(ETH_P_VLAN); + /* BE + le_to_cpu() + ~cpu_to_le()~ = BE */ + dot1q_buffer[1] = cpu_to_le16(txdw1 & CP_TX_VLAN_TAG_MASK); + } else { + dot1q_buffer = NULL; + } + + /* reset the card space to protect from recursive call */ + s->cplus_txbuffer = NULL; + s->cplus_txbuffer_offset = 0; + s->cplus_txbuffer_len = 0; + + if (txdw0 & (CP_TX_IPCS | CP_TX_UDPCS | CP_TX_TCPCS | CP_TX_LGSEN)) + { + DPRINTF("+++ C+ mode offloaded task checksum\n"); + + /* Large enough for Ethernet and IP headers? */ + if (saved_size < ETH_HLEN + sizeof(struct ip_header)) { + goto skip_offload; + } + + /* ip packet header */ + struct ip_header *ip = NULL; + int hlen = 0; + uint8_t ip_protocol = 0; + uint16_t ip_data_len = 0; + + uint8_t *eth_payload_data = NULL; + size_t eth_payload_len = 0; + + int proto = be16_to_cpu(*(uint16_t *)(saved_buffer + 12)); + if (proto != ETH_P_IP) + { + goto skip_offload; + } + + DPRINTF("+++ C+ mode has IP packet\n"); + + /* Note on memory alignment: eth_payload_data is 16-bit aligned + * since saved_buffer is allocated with g_malloc() and ETH_HLEN is + * even. 32-bit accesses must use ldl/stl wrappers to avoid + * unaligned accesses. + */ + eth_payload_data = saved_buffer + ETH_HLEN; + eth_payload_len = saved_size - ETH_HLEN; + + ip = (struct ip_header*)eth_payload_data; + + if (IP_HEADER_VERSION(ip) != IP_HEADER_VERSION_4) { + DPRINTF("+++ C+ mode packet has bad IP version %d " + "expected %d\n", IP_HEADER_VERSION(ip), + IP_HEADER_VERSION_4); + goto skip_offload; + } + + hlen = IP_HDR_GET_LEN(ip); + if (hlen < sizeof(struct ip_header) || hlen > eth_payload_len) { + goto skip_offload; + } + + ip_protocol = ip->ip_p; + + ip_data_len = be16_to_cpu(ip->ip_len); + if (ip_data_len < hlen || ip_data_len > eth_payload_len) { + goto skip_offload; + } + ip_data_len -= hlen; + + if (txdw0 & CP_TX_IPCS) + { + DPRINTF("+++ C+ mode need IP checksum\n"); + + ip->ip_sum = 0; + ip->ip_sum = ip_checksum(ip, hlen); + DPRINTF("+++ C+ mode IP header len=%d checksum=%04x\n", + hlen, ip->ip_sum); + } + + if ((txdw0 & CP_TX_LGSEN) && ip_protocol == IP_PROTO_TCP) + { + /* Large enough for the TCP header? */ + if (ip_data_len < sizeof(tcp_header)) { + goto skip_offload; + } + + int large_send_mss = (txdw0 >> 16) & CP_TC_LGSEN_MSS_MASK; + + DPRINTF("+++ C+ mode offloaded task TSO MTU=%d IP data %d " + "frame data %d specified MSS=%d\n", ETH_MTU, + ip_data_len, saved_size - ETH_HLEN, large_send_mss); + + int tcp_send_offset = 0; + int send_count = 0; + + /* maximum IP header length is 60 bytes */ + uint8_t saved_ip_header[60]; + + /* save IP header template; data area is used in tcp checksum calculation */ + memcpy(saved_ip_header, eth_payload_data, hlen); + + /* a placeholder for checksum calculation routine in tcp case */ + uint8_t *data_to_checksum = eth_payload_data + hlen - 12; + // size_t data_to_checksum_len = eth_payload_len - hlen + 12; + + /* pointer to TCP header */ + tcp_header *p_tcp_hdr = (tcp_header*)(eth_payload_data + hlen); + + int tcp_hlen = TCP_HEADER_DATA_OFFSET(p_tcp_hdr); + + /* Invalid TCP data offset? */ + if (tcp_hlen < sizeof(tcp_header) || tcp_hlen > ip_data_len) { + goto skip_offload; + } + + /* ETH_MTU = ip header len + tcp header len + payload */ + int tcp_data_len = ip_data_len - tcp_hlen; + int tcp_chunk_size = ETH_MTU - hlen - tcp_hlen; + + DPRINTF("+++ C+ mode TSO IP data len %d TCP hlen %d TCP " + "data len %d TCP chunk size %d\n", ip_data_len, + tcp_hlen, tcp_data_len, tcp_chunk_size); + + /* note the cycle below overwrites IP header data, + but restores it from saved_ip_header before sending packet */ + + int is_last_frame = 0; + + for (tcp_send_offset = 0; tcp_send_offset < tcp_data_len; tcp_send_offset += tcp_chunk_size) + { + uint16_t chunk_size = tcp_chunk_size; + + /* check if this is the last frame */ + if (tcp_send_offset + tcp_chunk_size >= tcp_data_len) + { + is_last_frame = 1; + chunk_size = tcp_data_len - tcp_send_offset; + } + + DPRINTF("+++ C+ mode TSO TCP seqno %08x\n", + ldl_be_p(&p_tcp_hdr->th_seq)); + + /* add 4 TCP pseudoheader fields */ + /* copy IP source and destination fields */ + memcpy(data_to_checksum, saved_ip_header + 12, 8); + + DPRINTF("+++ C+ mode TSO calculating TCP checksum for " + "packet with %d bytes data\n", tcp_hlen + + chunk_size); + + if (tcp_send_offset) + { + memcpy((uint8_t*)p_tcp_hdr + tcp_hlen, (uint8_t*)p_tcp_hdr + tcp_hlen + tcp_send_offset, chunk_size); + } + + /* keep PUSH and FIN flags only for the last frame */ + if (!is_last_frame) + { + TCP_HEADER_CLEAR_FLAGS(p_tcp_hdr, TH_PUSH | TH_FIN); + } + + /* recalculate TCP checksum */ + ip_pseudo_header *p_tcpip_hdr = (ip_pseudo_header *)data_to_checksum; + p_tcpip_hdr->zeros = 0; + p_tcpip_hdr->ip_proto = IP_PROTO_TCP; + p_tcpip_hdr->ip_payload = cpu_to_be16(tcp_hlen + chunk_size); + + p_tcp_hdr->th_sum = 0; + + int tcp_checksum = ip_checksum(data_to_checksum, tcp_hlen + chunk_size + 12); + DPRINTF("+++ C+ mode TSO TCP checksum %04x\n", + tcp_checksum); + + p_tcp_hdr->th_sum = tcp_checksum; + + /* restore IP header */ + memcpy(eth_payload_data, saved_ip_header, hlen); + + /* set IP data length and recalculate IP checksum */ + ip->ip_len = cpu_to_be16(hlen + tcp_hlen + chunk_size); + + /* increment IP id for subsequent frames */ + ip->ip_id = cpu_to_be16(tcp_send_offset/tcp_chunk_size + be16_to_cpu(ip->ip_id)); + + ip->ip_sum = 0; + ip->ip_sum = ip_checksum(eth_payload_data, hlen); + DPRINTF("+++ C+ mode TSO IP header len=%d " + "checksum=%04x\n", hlen, ip->ip_sum); + + int tso_send_size = ETH_HLEN + hlen + tcp_hlen + chunk_size; + DPRINTF("+++ C+ mode TSO transferring packet size " + "%d\n", tso_send_size); + rtl8139_transfer_frame(s, saved_buffer, tso_send_size, + 0, (uint8_t *) dot1q_buffer); + + /* add transferred count to TCP sequence number */ + stl_be_p(&p_tcp_hdr->th_seq, + chunk_size + ldl_be_p(&p_tcp_hdr->th_seq)); + ++send_count; + } + + /* Stop sending this frame */ + saved_size = 0; + } + else if (txdw0 & (CP_TX_TCPCS|CP_TX_UDPCS)) + { + DPRINTF("+++ C+ mode need TCP or UDP checksum\n"); + + /* maximum IP header length is 60 bytes */ + uint8_t saved_ip_header[60]; + memcpy(saved_ip_header, eth_payload_data, hlen); + + uint8_t *data_to_checksum = eth_payload_data + hlen - 12; + // size_t data_to_checksum_len = eth_payload_len - hlen + 12; + + /* add 4 TCP pseudoheader fields */ + /* copy IP source and destination fields */ + memcpy(data_to_checksum, saved_ip_header + 12, 8); + + if ((txdw0 & CP_TX_TCPCS) && ip_protocol == IP_PROTO_TCP) + { + DPRINTF("+++ C+ mode calculating TCP checksum for " + "packet with %d bytes data\n", ip_data_len); + + ip_pseudo_header *p_tcpip_hdr = (ip_pseudo_header *)data_to_checksum; + p_tcpip_hdr->zeros = 0; + p_tcpip_hdr->ip_proto = IP_PROTO_TCP; + p_tcpip_hdr->ip_payload = cpu_to_be16(ip_data_len); + + tcp_header* p_tcp_hdr = (tcp_header *) (data_to_checksum+12); + + p_tcp_hdr->th_sum = 0; + + int tcp_checksum = ip_checksum(data_to_checksum, ip_data_len + 12); + DPRINTF("+++ C+ mode TCP checksum %04x\n", + tcp_checksum); + + p_tcp_hdr->th_sum = tcp_checksum; + } + else if ((txdw0 & CP_TX_UDPCS) && ip_protocol == IP_PROTO_UDP) + { + DPRINTF("+++ C+ mode calculating UDP checksum for " + "packet with %d bytes data\n", ip_data_len); + + ip_pseudo_header *p_udpip_hdr = (ip_pseudo_header *)data_to_checksum; + p_udpip_hdr->zeros = 0; + p_udpip_hdr->ip_proto = IP_PROTO_UDP; + p_udpip_hdr->ip_payload = cpu_to_be16(ip_data_len); + + udp_header *p_udp_hdr = (udp_header *) (data_to_checksum+12); + + p_udp_hdr->uh_sum = 0; + + int udp_checksum = ip_checksum(data_to_checksum, ip_data_len + 12); + DPRINTF("+++ C+ mode UDP checksum %04x\n", + udp_checksum); + + p_udp_hdr->uh_sum = udp_checksum; + } + + /* restore IP header */ + memcpy(eth_payload_data, saved_ip_header, hlen); + } + } + +skip_offload: + /* update tally counter */ + ++s->tally_counters.TxOk; + + DPRINTF("+++ C+ mode transmitting %d bytes packet\n", saved_size); + + rtl8139_transfer_frame(s, saved_buffer, saved_size, 1, + (uint8_t *) dot1q_buffer); + + /* restore card space if there was no recursion and reset offset */ + if (!s->cplus_txbuffer) + { + s->cplus_txbuffer = saved_buffer; + s->cplus_txbuffer_len = saved_buffer_len; + s->cplus_txbuffer_offset = 0; + } + else + { + g_free(saved_buffer); + } + } + else + { + DPRINTF("+++ C+ mode transmission continue to next descriptor\n"); + } + + return 1; +} + +static void rtl8139_cplus_transmit(RTL8139State *s) +{ + int txcount = 0; + + while (rtl8139_cplus_transmit_one(s)) + { + ++txcount; + } + + /* Mark transfer completed */ + if (!txcount) + { + DPRINTF("C+ mode : transmitter queue stalled, current TxDesc = %d\n", + s->currCPlusTxDesc); + } + else + { + /* update interrupt status */ + s->IntrStatus |= TxOK; + rtl8139_update_irq(s); + } +} + +static void rtl8139_transmit(RTL8139State *s) +{ + int descriptor = s->currTxDesc, txcount = 0; + + /*while*/ + if (rtl8139_transmit_one(s, descriptor)) + { + ++s->currTxDesc; + s->currTxDesc %= 4; + ++txcount; + } + + /* Mark transfer completed */ + if (!txcount) + { + DPRINTF("transmitter queue stalled, current TxDesc = %d\n", + s->currTxDesc); + } +} + +static void rtl8139_TxStatus_write(RTL8139State *s, uint32_t txRegOffset, uint32_t val) +{ + + int descriptor = txRegOffset/4; + + /* handle C+ transmit mode register configuration */ + + if (s->cplus_enabled) + { + DPRINTF("RTL8139C+ DTCCR write offset=0x%x val=0x%08x " + "descriptor=%d\n", txRegOffset, val, descriptor); + + /* handle Dump Tally Counters command */ + s->TxStatus[descriptor] = val; + + if (descriptor == 0 && (val & 0x8)) + { + hwaddr tc_addr = rtl8139_addr64(s->TxStatus[0] & ~0x3f, s->TxStatus[1]); + + /* dump tally counters to specified memory location */ + RTL8139TallyCounters_dma_write(s, tc_addr); + + /* mark dump completed */ + s->TxStatus[0] &= ~0x8; + } + + return; + } + + DPRINTF("TxStatus write offset=0x%x val=0x%08x descriptor=%d\n", + txRegOffset, val, descriptor); + + /* mask only reserved bits */ + val &= ~0xff00c000; /* these bits are reset on write */ + val = SET_MASKED(val, 0x00c00000, s->TxStatus[descriptor]); + + s->TxStatus[descriptor] = val; + + /* attempt to start transmission */ + rtl8139_transmit(s); +} + +static uint32_t rtl8139_TxStatus_TxAddr_read(RTL8139State *s, uint32_t regs[], + uint32_t base, uint8_t addr, + int size) +{ + uint32_t reg = (addr - base) / 4; + uint32_t offset = addr & 0x3; + uint32_t ret = 0; + + if (addr & (size - 1)) { + DPRINTF("not implemented read for TxStatus/TxAddr " + "addr=0x%x size=0x%x\n", addr, size); + return ret; + } + + switch (size) { + case 1: /* fall through */ + case 2: /* fall through */ + case 4: + ret = (regs[reg] >> offset * 8) & (((uint64_t)1 << (size * 8)) - 1); + DPRINTF("TxStatus/TxAddr[%d] read addr=0x%x size=0x%x val=0x%08x\n", + reg, addr, size, ret); + break; + default: + DPRINTF("unsupported size 0x%x of TxStatus/TxAddr reading\n", size); + break; + } + + return ret; +} + +static uint16_t rtl8139_TSAD_read(RTL8139State *s) +{ + uint16_t ret = 0; + + /* Simulate TSAD, it is read only anyway */ + + ret = ((s->TxStatus[3] & TxStatOK )?TSAD_TOK3:0) + |((s->TxStatus[2] & TxStatOK )?TSAD_TOK2:0) + |((s->TxStatus[1] & TxStatOK )?TSAD_TOK1:0) + |((s->TxStatus[0] & TxStatOK )?TSAD_TOK0:0) + + |((s->TxStatus[3] & TxUnderrun)?TSAD_TUN3:0) + |((s->TxStatus[2] & TxUnderrun)?TSAD_TUN2:0) + |((s->TxStatus[1] & TxUnderrun)?TSAD_TUN1:0) + |((s->TxStatus[0] & TxUnderrun)?TSAD_TUN0:0) + + |((s->TxStatus[3] & TxAborted )?TSAD_TABT3:0) + |((s->TxStatus[2] & TxAborted )?TSAD_TABT2:0) + |((s->TxStatus[1] & TxAborted )?TSAD_TABT1:0) + |((s->TxStatus[0] & TxAborted )?TSAD_TABT0:0) + + |((s->TxStatus[3] & TxHostOwns )?TSAD_OWN3:0) + |((s->TxStatus[2] & TxHostOwns )?TSAD_OWN2:0) + |((s->TxStatus[1] & TxHostOwns )?TSAD_OWN1:0) + |((s->TxStatus[0] & TxHostOwns )?TSAD_OWN0:0) ; + + + DPRINTF("TSAD read val=0x%04x\n", ret); + + return ret; +} + +static uint16_t rtl8139_CSCR_read(RTL8139State *s) +{ + uint16_t ret = s->CSCR; + + DPRINTF("CSCR read val=0x%04x\n", ret); + + return ret; +} + +static void rtl8139_TxAddr_write(RTL8139State *s, uint32_t txAddrOffset, uint32_t val) +{ + DPRINTF("TxAddr write offset=0x%x val=0x%08x\n", txAddrOffset, val); + + s->TxAddr[txAddrOffset/4] = val; +} + +static uint32_t rtl8139_TxAddr_read(RTL8139State *s, uint32_t txAddrOffset) +{ + uint32_t ret = s->TxAddr[txAddrOffset/4]; + + DPRINTF("TxAddr read offset=0x%x val=0x%08x\n", txAddrOffset, ret); + + return ret; +} + +static void rtl8139_RxBufPtr_write(RTL8139State *s, uint32_t val) +{ + DPRINTF("RxBufPtr write val=0x%04x\n", val); + + /* this value is off by 16 */ + s->RxBufPtr = MOD2(val + 0x10, s->RxBufferSize); + + /* more buffer space may be available so try to receive */ + qemu_flush_queued_packets(qemu_get_queue(s->nic)); + + DPRINTF(" CAPR write: rx buffer length %d head 0x%04x read 0x%04x\n", + s->RxBufferSize, s->RxBufAddr, s->RxBufPtr); +} + +static uint32_t rtl8139_RxBufPtr_read(RTL8139State *s) +{ + /* this value is off by 16 */ + uint32_t ret = s->RxBufPtr - 0x10; + + DPRINTF("RxBufPtr read val=0x%04x\n", ret); + + return ret; +} + +static uint32_t rtl8139_RxBufAddr_read(RTL8139State *s) +{ + /* this value is NOT off by 16 */ + uint32_t ret = s->RxBufAddr; + + DPRINTF("RxBufAddr read val=0x%04x\n", ret); + + return ret; +} + +static void rtl8139_RxBuf_write(RTL8139State *s, uint32_t val) +{ + DPRINTF("RxBuf write val=0x%08x\n", val); + + s->RxBuf = val; + + /* may need to reset rxring here */ +} + +static uint32_t rtl8139_RxBuf_read(RTL8139State *s) +{ + uint32_t ret = s->RxBuf; + + DPRINTF("RxBuf read val=0x%08x\n", ret); + + return ret; +} + +static void rtl8139_IntrMask_write(RTL8139State *s, uint32_t val) +{ + DPRINTF("IntrMask write(w) val=0x%04x\n", val); + + /* mask unwritable bits */ + val = SET_MASKED(val, 0x1e00, s->IntrMask); + + s->IntrMask = val; + + rtl8139_update_irq(s); + +} + +static uint32_t rtl8139_IntrMask_read(RTL8139State *s) +{ + uint32_t ret = s->IntrMask; + + DPRINTF("IntrMask read(w) val=0x%04x\n", ret); + + return ret; +} + +static void rtl8139_IntrStatus_write(RTL8139State *s, uint32_t val) +{ + DPRINTF("IntrStatus write(w) val=0x%04x\n", val); + +#if 0 + + /* writing to ISR has no effect */ + + return; + +#else + uint16_t newStatus = s->IntrStatus & ~val; + + /* mask unwritable bits */ + newStatus = SET_MASKED(newStatus, 0x1e00, s->IntrStatus); + + /* writing 1 to interrupt status register bit clears it */ + s->IntrStatus = 0; + rtl8139_update_irq(s); + + s->IntrStatus = newStatus; + rtl8139_set_next_tctr_time(s); + rtl8139_update_irq(s); + +#endif +} + +static uint32_t rtl8139_IntrStatus_read(RTL8139State *s) +{ + uint32_t ret = s->IntrStatus; + + DPRINTF("IntrStatus read(w) val=0x%04x\n", ret); + +#if 0 + + /* reading ISR clears all interrupts */ + s->IntrStatus = 0; + + rtl8139_update_irq(s); + +#endif + + return ret; +} + +static void rtl8139_MultiIntr_write(RTL8139State *s, uint32_t val) +{ + DPRINTF("MultiIntr write(w) val=0x%04x\n", val); + + /* mask unwritable bits */ + val = SET_MASKED(val, 0xf000, s->MultiIntr); + + s->MultiIntr = val; +} + +static uint32_t rtl8139_MultiIntr_read(RTL8139State *s) +{ + uint32_t ret = s->MultiIntr; + + DPRINTF("MultiIntr read(w) val=0x%04x\n", ret); + + return ret; +} + +static void rtl8139_io_writeb(void *opaque, uint8_t addr, uint32_t val) +{ + RTL8139State *s = opaque; + + switch (addr) + { + case MAC0 ... MAC0+4: + s->phys[addr - MAC0] = val; + break; + case MAC0+5: + s->phys[addr - MAC0] = val; + qemu_format_nic_info_str(qemu_get_queue(s->nic), s->phys); + break; + case MAC0+6 ... MAC0+7: + /* reserved */ + break; + case MAR0 ... MAR0+7: + s->mult[addr - MAR0] = val; + break; + case ChipCmd: + rtl8139_ChipCmd_write(s, val); + break; + case Cfg9346: + rtl8139_Cfg9346_write(s, val); + break; + case TxConfig: /* windows driver sometimes writes using byte-lenth call */ + rtl8139_TxConfig_writeb(s, val); + break; + case Config0: + rtl8139_Config0_write(s, val); + break; + case Config1: + rtl8139_Config1_write(s, val); + break; + case Config3: + rtl8139_Config3_write(s, val); + break; + case Config4: + rtl8139_Config4_write(s, val); + break; + case Config5: + rtl8139_Config5_write(s, val); + break; + case MediaStatus: + /* ignore */ + DPRINTF("not implemented write(b) to MediaStatus val=0x%02x\n", + val); + break; + + case HltClk: + DPRINTF("HltClk write val=0x%08x\n", val); + if (val == 'R') + { + s->clock_enabled = 1; + } + else if (val == 'H') + { + s->clock_enabled = 0; + } + break; + + case TxThresh: + DPRINTF("C+ TxThresh write(b) val=0x%02x\n", val); + s->TxThresh = val; + break; + + case TxPoll: + DPRINTF("C+ TxPoll write(b) val=0x%02x\n", val); + if (val & (1 << 7)) + { + DPRINTF("C+ TxPoll high priority transmission (not " + "implemented)\n"); + //rtl8139_cplus_transmit(s); + } + if (val & (1 << 6)) + { + DPRINTF("C+ TxPoll normal priority transmission\n"); + rtl8139_cplus_transmit(s); + } + + break; + + default: + DPRINTF("not implemented write(b) addr=0x%x val=0x%02x\n", addr, + val); + break; + } +} + +static void rtl8139_io_writew(void *opaque, uint8_t addr, uint32_t val) +{ + RTL8139State *s = opaque; + + switch (addr) + { + case IntrMask: + rtl8139_IntrMask_write(s, val); + break; + + case IntrStatus: + rtl8139_IntrStatus_write(s, val); + break; + + case MultiIntr: + rtl8139_MultiIntr_write(s, val); + break; + + case RxBufPtr: + rtl8139_RxBufPtr_write(s, val); + break; + + case BasicModeCtrl: + rtl8139_BasicModeCtrl_write(s, val); + break; + case BasicModeStatus: + rtl8139_BasicModeStatus_write(s, val); + break; + case NWayAdvert: + DPRINTF("NWayAdvert write(w) val=0x%04x\n", val); + s->NWayAdvert = val; + break; + case NWayLPAR: + DPRINTF("forbidden NWayLPAR write(w) val=0x%04x\n", val); + break; + case NWayExpansion: + DPRINTF("NWayExpansion write(w) val=0x%04x\n", val); + s->NWayExpansion = val; + break; + + case CpCmd: + rtl8139_CpCmd_write(s, val); + break; + + case IntrMitigate: + rtl8139_IntrMitigate_write(s, val); + break; + + default: + DPRINTF("ioport write(w) addr=0x%x val=0x%04x via write(b)\n", + addr, val); + + rtl8139_io_writeb(opaque, addr, val & 0xff); + rtl8139_io_writeb(opaque, addr + 1, (val >> 8) & 0xff); + break; + } +} + +static void rtl8139_set_next_tctr_time(RTL8139State *s) +{ + const uint64_t ns_per_period = (uint64_t)PCI_PERIOD << 32; + + DPRINTF("entered rtl8139_set_next_tctr_time\n"); + + /* This function is called at least once per period, so it is a good + * place to update the timer base. + * + * After one iteration of this loop the value in the Timer register does + * not change, but the device model is counting up by 2^32 ticks (approx. + * 130 seconds). + */ + while (s->TCTR_base + ns_per_period <= qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)) { + s->TCTR_base += ns_per_period; + } + + if (!s->TimerInt) { + timer_del(s->timer); + } else { + uint64_t delta = (uint64_t)s->TimerInt * PCI_PERIOD; + if (s->TCTR_base + delta <= qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)) { + delta += ns_per_period; + } + timer_mod(s->timer, s->TCTR_base + delta); + } +} + +static void rtl8139_io_writel(void *opaque, uint8_t addr, uint32_t val) +{ + RTL8139State *s = opaque; + + switch (addr) + { + case RxMissed: + DPRINTF("RxMissed clearing on write\n"); + s->RxMissed = 0; + break; + + case TxConfig: + rtl8139_TxConfig_write(s, val); + break; + + case RxConfig: + rtl8139_RxConfig_write(s, val); + break; + + case TxStatus0 ... TxStatus0+4*4-1: + rtl8139_TxStatus_write(s, addr-TxStatus0, val); + break; + + case TxAddr0 ... TxAddr0+4*4-1: + rtl8139_TxAddr_write(s, addr-TxAddr0, val); + break; + + case RxBuf: + rtl8139_RxBuf_write(s, val); + break; + + case RxRingAddrLO: + DPRINTF("C+ RxRing low bits write val=0x%08x\n", val); + s->RxRingAddrLO = val; + break; + + case RxRingAddrHI: + DPRINTF("C+ RxRing high bits write val=0x%08x\n", val); + s->RxRingAddrHI = val; + break; + + case Timer: + DPRINTF("TCTR Timer reset on write\n"); + s->TCTR_base = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + rtl8139_set_next_tctr_time(s); + break; + + case FlashReg: + DPRINTF("FlashReg TimerInt write val=0x%08x\n", val); + if (s->TimerInt != val) { + s->TimerInt = val; + rtl8139_set_next_tctr_time(s); + } + break; + + default: + DPRINTF("ioport write(l) addr=0x%x val=0x%08x via write(b)\n", + addr, val); + rtl8139_io_writeb(opaque, addr, val & 0xff); + rtl8139_io_writeb(opaque, addr + 1, (val >> 8) & 0xff); + rtl8139_io_writeb(opaque, addr + 2, (val >> 16) & 0xff); + rtl8139_io_writeb(opaque, addr + 3, (val >> 24) & 0xff); + break; + } +} + +static uint32_t rtl8139_io_readb(void *opaque, uint8_t addr) +{ + RTL8139State *s = opaque; + int ret; + + switch (addr) + { + case MAC0 ... MAC0+5: + ret = s->phys[addr - MAC0]; + break; + case MAC0+6 ... MAC0+7: + ret = 0; + break; + case MAR0 ... MAR0+7: + ret = s->mult[addr - MAR0]; + break; + case TxStatus0 ... TxStatus0+4*4-1: + ret = rtl8139_TxStatus_TxAddr_read(s, s->TxStatus, TxStatus0, + addr, 1); + break; + case ChipCmd: + ret = rtl8139_ChipCmd_read(s); + break; + case Cfg9346: + ret = rtl8139_Cfg9346_read(s); + break; + case Config0: + ret = rtl8139_Config0_read(s); + break; + case Config1: + ret = rtl8139_Config1_read(s); + break; + case Config3: + ret = rtl8139_Config3_read(s); + break; + case Config4: + ret = rtl8139_Config4_read(s); + break; + case Config5: + ret = rtl8139_Config5_read(s); + break; + + case MediaStatus: + /* The LinkDown bit of MediaStatus is inverse with link status */ + ret = 0xd0 | (~s->BasicModeStatus & 0x04); + DPRINTF("MediaStatus read 0x%x\n", ret); + break; + + case HltClk: + ret = s->clock_enabled; + DPRINTF("HltClk read 0x%x\n", ret); + break; + + case PCIRevisionID: + ret = RTL8139_PCI_REVID; + DPRINTF("PCI Revision ID read 0x%x\n", ret); + break; + + case TxThresh: + ret = s->TxThresh; + DPRINTF("C+ TxThresh read(b) val=0x%02x\n", ret); + break; + + case 0x43: /* Part of TxConfig register. Windows driver tries to read it */ + ret = s->TxConfig >> 24; + DPRINTF("RTL8139C TxConfig at 0x43 read(b) val=0x%02x\n", ret); + break; + + default: + DPRINTF("not implemented read(b) addr=0x%x\n", addr); + ret = 0; + break; + } + + return ret; +} + +static uint32_t rtl8139_io_readw(void *opaque, uint8_t addr) +{ + RTL8139State *s = opaque; + uint32_t ret; + + switch (addr) + { + case TxAddr0 ... TxAddr0+4*4-1: + ret = rtl8139_TxStatus_TxAddr_read(s, s->TxAddr, TxAddr0, addr, 2); + break; + case IntrMask: + ret = rtl8139_IntrMask_read(s); + break; + + case IntrStatus: + ret = rtl8139_IntrStatus_read(s); + break; + + case MultiIntr: + ret = rtl8139_MultiIntr_read(s); + break; + + case RxBufPtr: + ret = rtl8139_RxBufPtr_read(s); + break; + + case RxBufAddr: + ret = rtl8139_RxBufAddr_read(s); + break; + + case BasicModeCtrl: + ret = rtl8139_BasicModeCtrl_read(s); + break; + case BasicModeStatus: + ret = rtl8139_BasicModeStatus_read(s); + break; + case NWayAdvert: + ret = s->NWayAdvert; + DPRINTF("NWayAdvert read(w) val=0x%04x\n", ret); + break; + case NWayLPAR: + ret = s->NWayLPAR; + DPRINTF("NWayLPAR read(w) val=0x%04x\n", ret); + break; + case NWayExpansion: + ret = s->NWayExpansion; + DPRINTF("NWayExpansion read(w) val=0x%04x\n", ret); + break; + + case CpCmd: + ret = rtl8139_CpCmd_read(s); + break; + + case IntrMitigate: + ret = rtl8139_IntrMitigate_read(s); + break; + + case TxSummary: + ret = rtl8139_TSAD_read(s); + break; + + case CSCR: + ret = rtl8139_CSCR_read(s); + break; + + default: + DPRINTF("ioport read(w) addr=0x%x via read(b)\n", addr); + + ret = rtl8139_io_readb(opaque, addr); + ret |= rtl8139_io_readb(opaque, addr + 1) << 8; + + DPRINTF("ioport read(w) addr=0x%x val=0x%04x\n", addr, ret); + break; + } + + return ret; +} + +static uint32_t rtl8139_io_readl(void *opaque, uint8_t addr) +{ + RTL8139State *s = opaque; + uint32_t ret; + + switch (addr) + { + case RxMissed: + ret = s->RxMissed; + + DPRINTF("RxMissed read val=0x%08x\n", ret); + break; + + case TxConfig: + ret = rtl8139_TxConfig_read(s); + break; + + case RxConfig: + ret = rtl8139_RxConfig_read(s); + break; + + case TxStatus0 ... TxStatus0+4*4-1: + ret = rtl8139_TxStatus_TxAddr_read(s, s->TxStatus, TxStatus0, + addr, 4); + break; + + case TxAddr0 ... TxAddr0+4*4-1: + ret = rtl8139_TxAddr_read(s, addr-TxAddr0); + break; + + case RxBuf: + ret = rtl8139_RxBuf_read(s); + break; + + case RxRingAddrLO: + ret = s->RxRingAddrLO; + DPRINTF("C+ RxRing low bits read val=0x%08x\n", ret); + break; + + case RxRingAddrHI: + ret = s->RxRingAddrHI; + DPRINTF("C+ RxRing high bits read val=0x%08x\n", ret); + break; + + case Timer: + ret = (qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - s->TCTR_base) / + PCI_PERIOD; + DPRINTF("TCTR Timer read val=0x%08x\n", ret); + break; + + case FlashReg: + ret = s->TimerInt; + DPRINTF("FlashReg TimerInt read val=0x%08x\n", ret); + break; + + default: + DPRINTF("ioport read(l) addr=0x%x via read(b)\n", addr); + + ret = rtl8139_io_readb(opaque, addr); + ret |= rtl8139_io_readb(opaque, addr + 1) << 8; + ret |= rtl8139_io_readb(opaque, addr + 2) << 16; + ret |= rtl8139_io_readb(opaque, addr + 3) << 24; + + DPRINTF("read(l) addr=0x%x val=%08x\n", addr, ret); + break; + } + + return ret; +} + +/* */ + +static void rtl8139_mmio_writeb(void *opaque, hwaddr addr, uint32_t val) +{ + rtl8139_io_writeb(opaque, addr & 0xFF, val); +} + +static void rtl8139_mmio_writew(void *opaque, hwaddr addr, uint32_t val) +{ + rtl8139_io_writew(opaque, addr & 0xFF, val); +} + +static void rtl8139_mmio_writel(void *opaque, hwaddr addr, uint32_t val) +{ + rtl8139_io_writel(opaque, addr & 0xFF, val); +} + +static uint32_t rtl8139_mmio_readb(void *opaque, hwaddr addr) +{ + return rtl8139_io_readb(opaque, addr & 0xFF); +} + +static uint32_t rtl8139_mmio_readw(void *opaque, hwaddr addr) +{ + uint32_t val = rtl8139_io_readw(opaque, addr & 0xFF); + return val; +} + +static uint32_t rtl8139_mmio_readl(void *opaque, hwaddr addr) +{ + uint32_t val = rtl8139_io_readl(opaque, addr & 0xFF); + return val; +} + +static int rtl8139_post_load(void *opaque, int version_id) +{ + RTL8139State* s = opaque; + rtl8139_set_next_tctr_time(s); + if (version_id < 4) { + s->cplus_enabled = s->CpCmd != 0; + } + + /* nc.link_down can't be migrated, so infer link_down according + * to link status bit in BasicModeStatus */ + qemu_get_queue(s->nic)->link_down = (s->BasicModeStatus & 0x04) == 0; + + return 0; +} + +static bool rtl8139_hotplug_ready_needed(void *opaque) +{ + return qdev_machine_modified(); +} + +static const VMStateDescription vmstate_rtl8139_hotplug_ready ={ + .name = "rtl8139/hotplug_ready", + .version_id = 1, + .minimum_version_id = 1, + .needed = rtl8139_hotplug_ready_needed, + .fields = (VMStateField[]) { + VMSTATE_END_OF_LIST() + } +}; + +static void rtl8139_pre_save(void *opaque) +{ + RTL8139State* s = opaque; + int64_t current_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + + /* for migration to older versions */ + s->TCTR = (current_time - s->TCTR_base) / PCI_PERIOD; + s->rtl8139_mmio_io_addr_dummy = 0; +} + +static const VMStateDescription vmstate_rtl8139 = { + .name = "rtl8139", + .version_id = 4, + .minimum_version_id = 3, + .post_load = rtl8139_post_load, + .pre_save = rtl8139_pre_save, + .fields = (VMStateField[]) { + VMSTATE_PCI_DEVICE(parent_obj, RTL8139State), + VMSTATE_PARTIAL_BUFFER(phys, RTL8139State, 6), + VMSTATE_BUFFER(mult, RTL8139State), + VMSTATE_UINT32_ARRAY(TxStatus, RTL8139State, 4), + VMSTATE_UINT32_ARRAY(TxAddr, RTL8139State, 4), + + VMSTATE_UINT32(RxBuf, RTL8139State), + VMSTATE_UINT32(RxBufferSize, RTL8139State), + VMSTATE_UINT32(RxBufPtr, RTL8139State), + VMSTATE_UINT32(RxBufAddr, RTL8139State), + + VMSTATE_UINT16(IntrStatus, RTL8139State), + VMSTATE_UINT16(IntrMask, RTL8139State), + + VMSTATE_UINT32(TxConfig, RTL8139State), + VMSTATE_UINT32(RxConfig, RTL8139State), + VMSTATE_UINT32(RxMissed, RTL8139State), + VMSTATE_UINT16(CSCR, RTL8139State), + + VMSTATE_UINT8(Cfg9346, RTL8139State), + VMSTATE_UINT8(Config0, RTL8139State), + VMSTATE_UINT8(Config1, RTL8139State), + VMSTATE_UINT8(Config3, RTL8139State), + VMSTATE_UINT8(Config4, RTL8139State), + VMSTATE_UINT8(Config5, RTL8139State), + + VMSTATE_UINT8(clock_enabled, RTL8139State), + VMSTATE_UINT8(bChipCmdState, RTL8139State), + + VMSTATE_UINT16(MultiIntr, RTL8139State), + + VMSTATE_UINT16(BasicModeCtrl, RTL8139State), + VMSTATE_UINT16(BasicModeStatus, RTL8139State), + VMSTATE_UINT16(NWayAdvert, RTL8139State), + VMSTATE_UINT16(NWayLPAR, RTL8139State), + VMSTATE_UINT16(NWayExpansion, RTL8139State), + + VMSTATE_UINT16(CpCmd, RTL8139State), + VMSTATE_UINT8(TxThresh, RTL8139State), + + VMSTATE_UNUSED(4), + VMSTATE_MACADDR(conf.macaddr, RTL8139State), + VMSTATE_INT32(rtl8139_mmio_io_addr_dummy, RTL8139State), + + VMSTATE_UINT32(currTxDesc, RTL8139State), + VMSTATE_UINT32(currCPlusRxDesc, RTL8139State), + VMSTATE_UINT32(currCPlusTxDesc, RTL8139State), + VMSTATE_UINT32(RxRingAddrLO, RTL8139State), + VMSTATE_UINT32(RxRingAddrHI, RTL8139State), + + VMSTATE_UINT16_ARRAY(eeprom.contents, RTL8139State, EEPROM_9346_SIZE), + VMSTATE_INT32(eeprom.mode, RTL8139State), + VMSTATE_UINT32(eeprom.tick, RTL8139State), + VMSTATE_UINT8(eeprom.address, RTL8139State), + VMSTATE_UINT16(eeprom.input, RTL8139State), + VMSTATE_UINT16(eeprom.output, RTL8139State), + + VMSTATE_UINT8(eeprom.eecs, RTL8139State), + VMSTATE_UINT8(eeprom.eesk, RTL8139State), + VMSTATE_UINT8(eeprom.eedi, RTL8139State), + VMSTATE_UINT8(eeprom.eedo, RTL8139State), + + VMSTATE_UINT32(TCTR, RTL8139State), + VMSTATE_UINT32(TimerInt, RTL8139State), + VMSTATE_INT64(TCTR_base, RTL8139State), + + VMSTATE_STRUCT(tally_counters, RTL8139State, 0, + vmstate_tally_counters, RTL8139TallyCounters), + + VMSTATE_UINT32_V(cplus_enabled, RTL8139State, 4), + VMSTATE_END_OF_LIST() + }, + .subsections = (const VMStateDescription*[]) { + &vmstate_rtl8139_hotplug_ready, + NULL + } +}; + +/***********************************************************/ +/* PCI RTL8139 definitions */ + +static void rtl8139_ioport_write(void *opaque, hwaddr addr, + uint64_t val, unsigned size) +{ + switch (size) { + case 1: + rtl8139_io_writeb(opaque, addr, val); + break; + case 2: + rtl8139_io_writew(opaque, addr, val); + break; + case 4: + rtl8139_io_writel(opaque, addr, val); + break; + } +} + +static uint64_t rtl8139_ioport_read(void *opaque, hwaddr addr, + unsigned size) +{ + switch (size) { + case 1: + return rtl8139_io_readb(opaque, addr); + case 2: + return rtl8139_io_readw(opaque, addr); + case 4: + return rtl8139_io_readl(opaque, addr); + } + + return -1; +} + +static const MemoryRegionOps rtl8139_io_ops = { + .read = rtl8139_ioport_read, + .write = rtl8139_ioport_write, + .impl = { + .min_access_size = 1, + .max_access_size = 4, + }, + .endianness = DEVICE_LITTLE_ENDIAN, +}; + +static const MemoryRegionOps rtl8139_mmio_ops = { + .old_mmio = { + .read = { + rtl8139_mmio_readb, + rtl8139_mmio_readw, + rtl8139_mmio_readl, + }, + .write = { + rtl8139_mmio_writeb, + rtl8139_mmio_writew, + rtl8139_mmio_writel, + }, + }, + .endianness = DEVICE_LITTLE_ENDIAN, +}; + +static void rtl8139_timer(void *opaque) +{ + RTL8139State *s = opaque; + + if (!s->clock_enabled) + { + DPRINTF(">>> timer: clock is not running\n"); + return; + } + + s->IntrStatus |= PCSTimeout; + rtl8139_update_irq(s); + rtl8139_set_next_tctr_time(s); +} + +static void pci_rtl8139_uninit(PCIDevice *dev) +{ + RTL8139State *s = RTL8139(dev); + + g_free(s->cplus_txbuffer); + s->cplus_txbuffer = NULL; + timer_del(s->timer); + timer_free(s->timer); + qemu_del_nic(s->nic); +} + +static void rtl8139_set_link_status(NetClientState *nc) +{ + RTL8139State *s = qemu_get_nic_opaque(nc); + + if (nc->link_down) { + s->BasicModeStatus &= ~0x04; + } else { + s->BasicModeStatus |= 0x04; + } + + s->IntrStatus |= RxUnderrun; + rtl8139_update_irq(s); +} + +static NetClientInfo net_rtl8139_info = { + .type = NET_CLIENT_OPTIONS_KIND_NIC, + .size = sizeof(NICState), + .can_receive = rtl8139_can_receive, + .receive = rtl8139_receive, + .link_status_changed = rtl8139_set_link_status, +}; + +static void pci_rtl8139_realize(PCIDevice *dev, Error **errp) +{ + RTL8139State *s = RTL8139(dev); + DeviceState *d = DEVICE(dev); + uint8_t *pci_conf; + + pci_conf = dev->config; + pci_conf[PCI_INTERRUPT_PIN] = 1; /* interrupt pin A */ + /* TODO: start of capability list, but no capability + * list bit in status register, and offset 0xdc seems unused. */ + pci_conf[PCI_CAPABILITY_LIST] = 0xdc; + + memory_region_init_io(&s->bar_io, OBJECT(s), &rtl8139_io_ops, s, + "rtl8139", 0x100); + memory_region_init_io(&s->bar_mem, OBJECT(s), &rtl8139_mmio_ops, s, + "rtl8139", 0x100); + pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->bar_io); + pci_register_bar(dev, 1, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->bar_mem); + + qemu_macaddr_default_if_unset(&s->conf.macaddr); + + /* prepare eeprom */ + s->eeprom.contents[0] = 0x8129; +#if 1 + /* PCI vendor and device ID should be mirrored here */ + s->eeprom.contents[1] = PCI_VENDOR_ID_REALTEK; + s->eeprom.contents[2] = PCI_DEVICE_ID_REALTEK_8139; +#endif + s->eeprom.contents[7] = s->conf.macaddr.a[0] | s->conf.macaddr.a[1] << 8; + s->eeprom.contents[8] = s->conf.macaddr.a[2] | s->conf.macaddr.a[3] << 8; + s->eeprom.contents[9] = s->conf.macaddr.a[4] | s->conf.macaddr.a[5] << 8; + + s->nic = qemu_new_nic(&net_rtl8139_info, &s->conf, + object_get_typename(OBJECT(dev)), d->id, s); + qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a); + + s->cplus_txbuffer = NULL; + s->cplus_txbuffer_len = 0; + s->cplus_txbuffer_offset = 0; + + s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, rtl8139_timer, s); +} + +static void rtl8139_instance_init(Object *obj) +{ + RTL8139State *s = RTL8139(obj); + + device_add_bootindex_property(obj, &s->conf.bootindex, + "bootindex", "/ethernet-phy@0", + DEVICE(obj), NULL); +} + +static Property rtl8139_properties[] = { + DEFINE_NIC_PROPERTIES(RTL8139State, conf), + DEFINE_PROP_END_OF_LIST(), +}; + +static void rtl8139_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); + + k->realize = pci_rtl8139_realize; + k->exit = pci_rtl8139_uninit; + k->romfile = "efi-rtl8139.rom"; + k->vendor_id = PCI_VENDOR_ID_REALTEK; + k->device_id = PCI_DEVICE_ID_REALTEK_8139; + k->revision = RTL8139_PCI_REVID; /* >=0x20 is for 8139C+ */ + k->class_id = PCI_CLASS_NETWORK_ETHERNET; + dc->reset = rtl8139_reset; + dc->vmsd = &vmstate_rtl8139; + dc->props = rtl8139_properties; + set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); +} + +static const TypeInfo rtl8139_info = { + .name = TYPE_RTL8139, + .parent = TYPE_PCI_DEVICE, + .instance_size = sizeof(RTL8139State), + .class_init = rtl8139_class_init, + .instance_init = rtl8139_instance_init, +}; + +static void rtl8139_register_types(void) +{ + type_register_static(&rtl8139_info); +} + +type_init(rtl8139_register_types) |
