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qemu/hw/rtl8139.c
Frediano Ziglio 05447803d0 rewrote timer implementation for rtl8139. 
Add a QEMU timer only when needed (timeout status not set, timeout
irq wanted and timer set).

This patch is required for Darwin. Patch has been tested under
FreeBSD, Darwin and Linux.

Signed-off-by: Frediano Ziglio <freddy77@gmail.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-23 13:23:29 -06:00

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/**
* 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 for
* Darwin)
*/
#include "hw.h"
#include "pci.h"
#include "qemu-timer.h"
#include "net.h"
#include "loader.h"
/* debug RTL8139 card */
//#define DEBUG_RTL8139 1
#define PCI_FREQUENCY 33000000L
/* debug RTL8139 card C+ mode only */
//#define DEBUG_RTL8139CP 1
/* Calculate CRCs properly on Rx packets */
#define RTL8139_CALCULATE_RXCRC 1
#if defined(RTL8139_CALCULATE_RXCRC)
/* For crc32 */
#include <zlib.h>
#endif
#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 ) )
#if defined (DEBUG_RTL8139)
# define DEBUG_PRINT(x) do { printf x ; } while (0)
#else
# define DEBUG_PRINT(x)
#endif
/* 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,
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_Lock = 0x00,
Cfg9346_Unlock = 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);
/* Writes tally counters to specified physical memory address */
static void RTL8139TallyCounters_physical_memory_write(target_phys_addr_t tc_addr, RTL8139TallyCounters* counters);
typedef struct RTL8139State {
PCIDevice dev;
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;
int rtl8139_mmio_io_addr;
/* 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;
int64_t TimerExpire;
} RTL8139State;
static void rtl8139_set_next_tctr_time(RTL8139State *s, int64_t current_time);
static void prom9346_decode_command(EEprom9346 *eeprom, uint8_t command)
{
DEBUG_PRINT(("RTL8139: 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;
DEBUG_PRINT(("RTL8139: 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 */
DEBUG_PRINT(("RTL8139: 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:
DEBUG_PRINT(("RTL8139: eeprom write enabled\n"));
break;
case Chip9346_op_write_all:
DEBUG_PRINT(("RTL8139: eeprom begin write all\n"));
break;
case Chip9346_op_write_disable:
DEBUG_PRINT(("RTL8139: eeprom write disabled\n"));
break;
}
break;
}
}
static void prom9346_shift_clock(EEprom9346 *eeprom)
{
int bit = eeprom->eedi?1:0;
++ eeprom->tick;
DEBUG_PRINT(("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;
DEBUG_PRINT(("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;
DEBUG_PRINT(("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;
DEBUG_PRINT(("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)
{
DEBUG_PRINT(("RTL8139: 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;
}
DEBUG_PRINT(("RTL8139: 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;
DEBUG_PRINT(("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;
DEBUG_PRINT(("=== eeprom: begin access, enter command mode\n"));
}
if (!eecs)
{
DEBUG_PRINT(("=== eeprom: end access\n"));
return;
}
if (!old_eesk && eesk)
{
/* SK front rules */
prom9346_shift_clock(eeprom);
}
}
static void rtl8139_update_irq(RTL8139State *s)
{
int isr;
isr = (s->IntrStatus & s->IntrMask) & 0xffff;
DEBUG_PRINT(("RTL8139: Set IRQ to %d (%04x %04x)\n",
isr ? 1 : 0, s->IntrStatus, s->IntrMask));
qemu_set_irq(s->dev.irq[0], (isr != 0));
}
#define POLYNOMIAL 0x04c11db6
/* From FreeBSD */
/* XXX: optimize */
static int compute_mcast_idx(const uint8_t *ep)
{
uint32_t crc;
int carry, i, j;
uint8_t b;
crc = 0xffffffff;
for (i = 0; i < 6; i++) {
b = *ep++;
for (j = 0; j < 8; j++) {
carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
crc <<= 1;
b >>= 1;
if (carry)
crc = ((crc ^ POLYNOMIAL) | carry);
}
}
return (crc >> 26);
}
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)
{
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)))
{
DEBUG_PRINT((">>> RTL8139: rx packet wrapped in buffer at %d\n", size-wrapped));
if (size > wrapped)
{
cpu_physical_memory_write( s->RxBuf + s->RxBufAddr,
buf, size-wrapped );
}
/* reset buffer pointer */
s->RxBufAddr = 0;
cpu_physical_memory_write( s->RxBuf + s->RxBufAddr,
buf + (size-wrapped), wrapped );
s->RxBufAddr = wrapped;
return;
}
}
/* non-wrapping path or overwrapping enabled */
cpu_physical_memory_write( s->RxBuf + s->RxBufAddr, buf, size );
s->RxBufAddr += size;
}
#define MIN_BUF_SIZE 60
static inline target_phys_addr_t rtl8139_addr64(uint32_t low, uint32_t high)
{
#if TARGET_PHYS_ADDR_BITS > 32
return low | ((target_phys_addr_t)high << 32);
#else
return low;
#endif
}
static int rtl8139_can_receive(VLANClientState *nc)
{
RTL8139State *s = DO_UPCAST(NICState, nc, nc)->opaque;
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)) {
/* ??? 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);
}
}
static ssize_t rtl8139_do_receive(VLANClientState *nc, const uint8_t *buf, size_t size_, int do_interrupt)
{
RTL8139State *s = DO_UPCAST(NICState, nc, nc)->opaque;
int size = size_;
uint32_t packet_header = 0;
uint8_t buf1[60];
static const uint8_t broadcast_macaddr[6] =
{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
DEBUG_PRINT((">>> RTL8139: received len=%d\n", size));
/* test if board clock is stopped */
if (!s->clock_enabled)
{
DEBUG_PRINT(("RTL8139: stopped ==========================\n"));
return -1;
}
/* first check if receiver is enabled */
if (!rtl8139_receiver_enabled(s))
{
DEBUG_PRINT(("RTL8139: receiver disabled ================\n"));
return -1;
}
/* XXX: check this */
if (s->RxConfig & AcceptAllPhys) {
/* promiscuous: receive all */
DEBUG_PRINT((">>> RTL8139: packet received in promiscuous mode\n"));
} else {
if (!memcmp(buf, broadcast_macaddr, 6)) {
/* broadcast address */
if (!(s->RxConfig & AcceptBroadcast))
{
DEBUG_PRINT((">>> RTL8139: broadcast packet rejected\n"));
/* update tally counter */
++s->tally_counters.RxERR;
return size;
}
packet_header |= RxBroadcast;
DEBUG_PRINT((">>> RTL8139: broadcast packet received\n"));
/* update tally counter */
++s->tally_counters.RxOkBrd;
} else if (buf[0] & 0x01) {
/* multicast */
if (!(s->RxConfig & AcceptMulticast))
{
DEBUG_PRINT((">>> RTL8139: 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))))
{
DEBUG_PRINT((">>> RTL8139: multicast address mismatch\n"));
/* update tally counter */
++s->tally_counters.RxERR;
return size;
}
packet_header |= RxMulticast;
DEBUG_PRINT((">>> RTL8139: 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))
{
DEBUG_PRINT((">>> RTL8139: rejecting physical address matching packet\n"));
/* update tally counter */
++s->tally_counters.RxERR;
return size;
}
packet_header |= RxPhysical;
DEBUG_PRINT((">>> RTL8139: physical address matching packet received\n"));
/* update tally counter */
++s->tally_counters.RxOkPhy;
} else {
DEBUG_PRINT((">>> RTL8139: unknown packet\n"));
/* update tally counter */
++s->tally_counters.RxERR;
return size;
}
}
/* if too small buffer, then expand it */
if (size < MIN_BUF_SIZE) {
memcpy(buf1, buf, size);
memset(buf1 + size, 0, MIN_BUF_SIZE - size);
buf = buf1;
size = MIN_BUF_SIZE;
}
if (rtl8139_cp_receiver_enabled(s))
{
DEBUG_PRINT(("RTL8139: 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;
target_phys_addr_t cplus_rx_ring_desc;
cplus_rx_ring_desc = rtl8139_addr64(s->RxRingAddrLO, s->RxRingAddrHI);
cplus_rx_ring_desc += 16 * descriptor;
DEBUG_PRINT(("RTL8139: +++ C+ mode reading RX descriptor %d from host memory at %08x %08x = %016" PRIx64 "\n",
descriptor, s->RxRingAddrHI, s->RxRingAddrLO, (uint64_t)cplus_rx_ring_desc));
uint32_t val, rxdw0,rxdw1,rxbufLO,rxbufHI;
cpu_physical_memory_read(cplus_rx_ring_desc, (uint8_t *)&val, 4);
rxdw0 = le32_to_cpu(val);
cpu_physical_memory_read(cplus_rx_ring_desc+4, (uint8_t *)&val, 4);
rxdw1 = le32_to_cpu(val);
cpu_physical_memory_read(cplus_rx_ring_desc+8, (uint8_t *)&val, 4);
rxbufLO = le32_to_cpu(val);
cpu_physical_memory_read(cplus_rx_ring_desc+12, (uint8_t *)&val, 4);
rxbufHI = le32_to_cpu(val);
DEBUG_PRINT(("RTL8139: +++ C+ mode RX descriptor %d %08x %08x %08x %08x\n",
descriptor,
rxdw0, rxdw1, rxbufLO, rxbufHI));
if (!(rxdw0 & CP_RX_OWN))
{
DEBUG_PRINT(("RTL8139: 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;
/* TODO: scatter the packet over available receive ring descriptors space */
if (size+4 > rx_space)
{
DEBUG_PRINT(("RTL8139: 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_;
}
target_phys_addr_t rx_addr = rtl8139_addr64(rxbufLO, rxbufHI);
/* receive/copy to target memory */
cpu_physical_memory_write( rx_addr, buf, size );
if (s->CpCmd & CPlusRxChkSum)
{
/* do some packet checksumming */
}
/* write checksum */
#if defined (RTL8139_CALCULATE_RXCRC)
val = cpu_to_le32(crc32(0, buf, size));
#else
val = 0;
#endif
cpu_physical_memory_write( 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);
/* reset VLAN tag flag */
rxdw1 &= ~CP_RX_TAVA;
/* update ring data */
val = cpu_to_le32(rxdw0);
cpu_physical_memory_write(cplus_rx_ring_desc, (uint8_t *)&val, 4);
val = cpu_to_le32(rxdw1);
cpu_physical_memory_write(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;
}
DEBUG_PRINT(("RTL8139: done C+ Rx mode ----------------\n"));
}
else
{
DEBUG_PRINT(("RTL8139: 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 */
if (avail != 0 && size + 8 >= avail)
{
DEBUG_PRINT(("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 size_;
}
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 */
#if defined (RTL8139_CALCULATE_RXCRC)
val = cpu_to_le32(crc32(0, buf, size));
#else
val = 0;
#endif
rtl8139_write_buffer(s, (uint8_t *)&val, 4);
/* correct buffer write pointer */
s->RxBufAddr = MOD2((s->RxBufAddr + 3) & ~0x3, s->RxBufferSize);
/* now we can signal we have received something */
DEBUG_PRINT((" 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(VLANClientState *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 = container_of(d, RTL8139State, dev.qdev);
int i;
/* restore MAC address */
memcpy(s->phys, s->conf.macaddr.a, 6);
/* reset interrupt mask */
s->IntrStatus = 0;
s->IntrMask = 0;
rtl8139_update_irq(s);
/* 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;
/* 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 */
s->BasicModeStatus |= 0x0004; /* link is up */
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;
/* 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_physical_memory_write(target_phys_addr_t tc_addr, RTL8139TallyCounters* tally_counters)
{
uint16_t val16;
uint32_t val32;
uint64_t val64;
val64 = cpu_to_le64(tally_counters->TxOk);
cpu_physical_memory_write(tc_addr + 0, (uint8_t *)&val64, 8);
val64 = cpu_to_le64(tally_counters->RxOk);
cpu_physical_memory_write(tc_addr + 8, (uint8_t *)&val64, 8);
val64 = cpu_to_le64(tally_counters->TxERR);
cpu_physical_memory_write(tc_addr + 16, (uint8_t *)&val64, 8);
val32 = cpu_to_le32(tally_counters->RxERR);
cpu_physical_memory_write(tc_addr + 24, (uint8_t *)&val32, 4);
val16 = cpu_to_le16(tally_counters->MissPkt);
cpu_physical_memory_write(tc_addr + 28, (uint8_t *)&val16, 2);
val16 = cpu_to_le16(tally_counters->FAE);
cpu_physical_memory_write(tc_addr + 30, (uint8_t *)&val16, 2);
val32 = cpu_to_le32(tally_counters->Tx1Col);
cpu_physical_memory_write(tc_addr + 32, (uint8_t *)&val32, 4);
val32 = cpu_to_le32(tally_counters->TxMCol);
cpu_physical_memory_write(tc_addr + 36, (uint8_t *)&val32, 4);
val64 = cpu_to_le64(tally_counters->RxOkPhy);
cpu_physical_memory_write(tc_addr + 40, (uint8_t *)&val64, 8);
val64 = cpu_to_le64(tally_counters->RxOkBrd);
cpu_physical_memory_write(tc_addr + 48, (uint8_t *)&val64, 8);
val32 = cpu_to_le32(tally_counters->RxOkMul);
cpu_physical_memory_write(tc_addr + 56, (uint8_t *)&val32, 4);
val16 = cpu_to_le16(tally_counters->TxAbt);
cpu_physical_memory_write(tc_addr + 60, (uint8_t *)&val16, 2);
val16 = cpu_to_le16(tally_counters->TxUndrn);
cpu_physical_memory_write(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,
.minimum_version_id_old = 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)
{
val &= 0xff;
DEBUG_PRINT(("RTL8139: ChipCmd write val=0x%08x\n", val));
if (val & CmdReset)
{
DEBUG_PRINT(("RTL8139: ChipCmd reset\n"));
rtl8139_reset(&s->dev.qdev);
}
if (val & CmdRxEnb)
{
DEBUG_PRINT(("RTL8139: ChipCmd enable receiver\n"));
s->currCPlusRxDesc = 0;
}
if (val & CmdTxEnb)
{
DEBUG_PRINT(("RTL8139: ChipCmd enable transmitter\n"));
s->currCPlusTxDesc = 0;
}
/* mask unwriteable 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)
{
DEBUG_PRINT(("RTL8139: receiver buffer data available 0x%04x\n", unread));
return 0;
}
DEBUG_PRINT(("RTL8139: 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;
DEBUG_PRINT(("RTL8139: ChipCmd read val=0x%04x\n", ret));
return ret;
}
static void rtl8139_CpCmd_write(RTL8139State *s, uint32_t val)
{
val &= 0xffff;
DEBUG_PRINT(("RTL8139C+ command register write(w) val=0x%04x\n", val));
s->cplus_enabled = 1;
/* mask unwriteable bits */
val = SET_MASKED(val, 0xff84, s->CpCmd);
s->CpCmd = val;
}
static uint32_t rtl8139_CpCmd_read(RTL8139State *s)
{
uint32_t ret = s->CpCmd;
DEBUG_PRINT(("RTL8139C+ command register read(w) val=0x%04x\n", ret));
return ret;
}
static void rtl8139_IntrMitigate_write(RTL8139State *s, uint32_t val)
{
DEBUG_PRINT(("RTL8139C+ IntrMitigate register write(w) val=0x%04x\n", val));
}
static uint32_t rtl8139_IntrMitigate_read(RTL8139State *s)
{
uint32_t ret = 0;
DEBUG_PRINT(("RTL8139C+ IntrMitigate register read(w) val=0x%04x\n", ret));
return ret;
}
static int rtl8139_config_writeable(RTL8139State *s)
{
if (s->Cfg9346 & Cfg9346_Unlock)
{
return 1;
}
DEBUG_PRINT(("RTL8139: Configuration registers are write-protected\n"));
return 0;
}
static void rtl8139_BasicModeCtrl_write(RTL8139State *s, uint32_t val)
{
val &= 0xffff;
DEBUG_PRINT(("RTL8139: BasicModeCtrl register write(w) val=0x%04x\n", val));
/* mask unwriteable bits */
uint32_t mask = 0x4cff;
if (1 || !rtl8139_config_writeable(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;
DEBUG_PRINT(("RTL8139: BasicModeCtrl register read(w) val=0x%04x\n", ret));
return ret;
}
static void rtl8139_BasicModeStatus_write(RTL8139State *s, uint32_t val)
{
val &= 0xffff;
DEBUG_PRINT(("RTL8139: BasicModeStatus register write(w) val=0x%04x\n", val));
/* mask unwriteable bits */
val = SET_MASKED(val, 0xff3f, s->BasicModeStatus);
s->BasicModeStatus = val;
}
static uint32_t rtl8139_BasicModeStatus_read(RTL8139State *s)
{
uint32_t ret = s->BasicModeStatus;
DEBUG_PRINT(("RTL8139: BasicModeStatus register read(w) val=0x%04x\n", ret));
return ret;
}
static void rtl8139_Cfg9346_write(RTL8139State *s, uint32_t val)
{
val &= 0xff;
DEBUG_PRINT(("RTL8139: Cfg9346 write val=0x%02x\n", val));
/* mask unwriteable 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(&s->dev.qdev);
}
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;
}
}
DEBUG_PRINT(("RTL8139: Cfg9346 read val=0x%02x\n", ret));
return ret;
}
static void rtl8139_Config0_write(RTL8139State *s, uint32_t val)
{
val &= 0xff;
DEBUG_PRINT(("RTL8139: Config0 write val=0x%02x\n", val));
if (!rtl8139_config_writeable(s))
return;
/* mask unwriteable bits */
val = SET_MASKED(val, 0xf8, s->Config0);
s->Config0 = val;
}
static uint32_t rtl8139_Config0_read(RTL8139State *s)
{
uint32_t ret = s->Config0;
DEBUG_PRINT(("RTL8139: Config0 read val=0x%02x\n", ret));
return ret;
}
static void rtl8139_Config1_write(RTL8139State *s, uint32_t val)
{
val &= 0xff;
DEBUG_PRINT(("RTL8139: Config1 write val=0x%02x\n", val));
if (!rtl8139_config_writeable(s))
return;
/* mask unwriteable bits */
val = SET_MASKED(val, 0xC, s->Config1);
s->Config1 = val;
}
static uint32_t rtl8139_Config1_read(RTL8139State *s)
{
uint32_t ret = s->Config1;
DEBUG_PRINT(("RTL8139: Config1 read val=0x%02x\n", ret));
return ret;
}
static void rtl8139_Config3_write(RTL8139State *s, uint32_t val)
{
val &= 0xff;
DEBUG_PRINT(("RTL8139: Config3 write val=0x%02x\n", val));
if (!rtl8139_config_writeable(s))
return;
/* mask unwriteable bits */
val = SET_MASKED(val, 0x8F, s->Config3);
s->Config3 = val;
}
static uint32_t rtl8139_Config3_read(RTL8139State *s)
{
uint32_t ret = s->Config3;
DEBUG_PRINT(("RTL8139: Config3 read val=0x%02x\n", ret));
return ret;
}
static void rtl8139_Config4_write(RTL8139State *s, uint32_t val)
{
val &= 0xff;
DEBUG_PRINT(("RTL8139: Config4 write val=0x%02x\n", val));
if (!rtl8139_config_writeable(s))
return;
/* mask unwriteable bits */
val = SET_MASKED(val, 0x0a, s->Config4);
s->Config4 = val;
}
static uint32_t rtl8139_Config4_read(RTL8139State *s)
{
uint32_t ret = s->Config4;
DEBUG_PRINT(("RTL8139: Config4 read val=0x%02x\n", ret));
return ret;
}
static void rtl8139_Config5_write(RTL8139State *s, uint32_t val)
{
val &= 0xff;
DEBUG_PRINT(("RTL8139: Config5 write val=0x%02x\n", val));
/* mask unwriteable bits */
val = SET_MASKED(val, 0x80, s->Config5);
s->Config5 = val;
}
static uint32_t rtl8139_Config5_read(RTL8139State *s)
{
uint32_t ret = s->Config5;
DEBUG_PRINT(("RTL8139: Config5 read val=0x%02x\n", ret));
return ret;
}
static void rtl8139_TxConfig_write(RTL8139State *s, uint32_t val)
{
if (!rtl8139_transmitter_enabled(s))
{
DEBUG_PRINT(("RTL8139: transmitter disabled; no TxConfig write val=0x%08x\n", val));
return;
}
DEBUG_PRINT(("RTL8139: 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)
{
DEBUG_PRINT(("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;
DEBUG_PRINT(("RTL8139: TxConfig read val=0x%04x\n", ret));
return ret;
}
static void rtl8139_RxConfig_write(RTL8139State *s, uint32_t val)
{
DEBUG_PRINT(("RTL8139: RxConfig write val=0x%08x\n", val));
/* mask unwriteable 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));
DEBUG_PRINT(("RTL8139: RxConfig write reset buffer size to %d\n", s->RxBufferSize));
}
static uint32_t rtl8139_RxConfig_read(RTL8139State *s)
{
uint32_t ret = s->RxConfig;
DEBUG_PRINT(("RTL8139: RxConfig read val=0x%08x\n", ret));
return ret;
}
static void rtl8139_transfer_frame(RTL8139State *s, const uint8_t *buf, int size, int do_interrupt)
{
if (!size)
{
DEBUG_PRINT(("RTL8139: +++ empty ethernet frame\n"));
return;
}
if (TxLoopBack == (s->TxConfig & TxLoopBack))
{
DEBUG_PRINT(("RTL8139: +++ transmit loopback mode\n"));
rtl8139_do_receive(&s->nic->nc, buf, size, do_interrupt);
}
else
{
qemu_send_packet(&s->nic->nc, buf, size);
}
}
static int rtl8139_transmit_one(RTL8139State *s, int descriptor)
{
if (!rtl8139_transmitter_enabled(s))
{
DEBUG_PRINT(("RTL8139: +++ cannot transmit from descriptor %d: transmitter disabled\n",
descriptor));
return 0;
}
if (s->TxStatus[descriptor] & TxHostOwns)
{
DEBUG_PRINT(("RTL8139: +++ cannot transmit from descriptor %d: owned by host (%08x)\n",
descriptor, s->TxStatus[descriptor]));
return 0;
}
DEBUG_PRINT(("RTL8139: +++ transmitting from descriptor %d\n", descriptor));
int txsize = s->TxStatus[descriptor] & 0x1fff;
uint8_t txbuffer[0x2000];
DEBUG_PRINT(("RTL8139: +++ transmit reading %d bytes from host memory at 0x%08x\n",
txsize, s->TxAddr[descriptor]));
cpu_physical_memory_read(s->TxAddr[descriptor], txbuffer, txsize);
/* Mark descriptor as transferred */
s->TxStatus[descriptor] |= TxHostOwns;
s->TxStatus[descriptor] |= TxStatOK;
rtl8139_transfer_frame(s, txbuffer, txsize, 0);
DEBUG_PRINT(("RTL8139: +++ 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 */
typedef struct ip_header
{
uint8_t ip_ver_len; /* version and header length */
uint8_t ip_tos; /* type of service */
uint16_t ip_len; /* total length */
uint16_t ip_id; /* identification */
uint16_t ip_off; /* fragment offset field */
uint8_t ip_ttl; /* time to live */
uint8_t ip_p; /* protocol */
uint16_t ip_sum; /* checksum */
uint32_t ip_src,ip_dst; /* source and dest address */
} ip_header;
#define IP_HEADER_VERSION_4 4
#define IP_HEADER_VERSION(ip) ((ip->ip_ver_len >> 4)&0xf)
#define IP_HEADER_LENGTH(ip) (((ip->ip_ver_len)&0xf) << 2)
typedef struct tcp_header
{
uint16_t th_sport; /* source port */
uint16_t th_dport; /* destination port */
uint32_t th_seq; /* sequence number */
uint32_t th_ack; /* acknowledgement number */
uint16_t th_offset_flags; /* data offset, reserved 6 bits, TCP protocol flags */
uint16_t th_win; /* window */
uint16_t th_sum; /* checksum */
uint16_t th_urp; /* urgent pointer */
} tcp_header;
typedef struct udp_header
{
uint16_t uh_sport; /* source port */
uint16_t uh_dport; /* destination port */
uint16_t uh_ulen; /* udp length */
uint16_t uh_sum; /* udp checksum */
} udp_header;
typedef struct ip_pseudo_header
{
uint32_t ip_src;
uint32_t ip_dst;
uint8_t zeros;
uint8_t ip_proto;
uint16_t ip_payload;
} ip_pseudo_header;
#define IP_PROTO_TCP 6
#define IP_PROTO_UDP 17
#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)))
#define TCP_FLAG_FIN 0x01
#define TCP_FLAG_PUSH 0x08
/* 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))
{
DEBUG_PRINT(("RTL8139: +++ C+ mode: transmitter disabled\n"));
return 0;
}
if (!rtl8139_cp_transmitter_enabled(s))
{
DEBUG_PRINT(("RTL8139: +++ C+ mode: C+ transmitter disabled\n"));
return 0 ;
}
int descriptor = s->currCPlusTxDesc;
target_phys_addr_t cplus_tx_ring_desc =
rtl8139_addr64(s->TxAddr[0], s->TxAddr[1]);
/* Normal priority ring */
cplus_tx_ring_desc += 16 * descriptor;
DEBUG_PRINT(("RTL8139: +++ C+ mode reading TX descriptor %d from host memory at %08x0x%08x = 0x%8lx\n",
descriptor, s->TxAddr[1], s->TxAddr[0], cplus_tx_ring_desc));
uint32_t val, txdw0,txdw1,txbufLO,txbufHI;
cpu_physical_memory_read(cplus_tx_ring_desc, (uint8_t *)&val, 4);
txdw0 = le32_to_cpu(val);
/* TODO: implement VLAN tagging support, VLAN tag data is read to txdw1 */
cpu_physical_memory_read(cplus_tx_ring_desc+4, (uint8_t *)&val, 4);
txdw1 = le32_to_cpu(val);
cpu_physical_memory_read(cplus_tx_ring_desc+8, (uint8_t *)&val, 4);
txbufLO = le32_to_cpu(val);
cpu_physical_memory_read(cplus_tx_ring_desc+12, (uint8_t *)&val, 4);
txbufHI = le32_to_cpu(val);
DEBUG_PRINT(("RTL8139: +++ C+ mode TX descriptor %d %08x %08x %08x %08x\n",
descriptor,
txdw0, txdw1, txbufLO, txbufHI));
/* TODO: the following discard cast should clean clang analyzer output */
(void)txdw1;
/* 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 tag available flag */
#define CP_RX_TAGC (1<<17)
/* w1 bits 0...15 : VLAN tag */
#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))
{
DEBUG_PRINT(("RTL8139: C+ Tx mode : descriptor %d is owned by host\n", descriptor));
return 0 ;
}
DEBUG_PRINT(("RTL8139: +++ C+ Tx mode : transmitting from descriptor %d\n", descriptor));
if (txdw0 & CP_TX_FS)
{
DEBUG_PRINT(("RTL8139: +++ 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;
target_phys_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 = qemu_malloc(s->cplus_txbuffer_len);
s->cplus_txbuffer_offset = 0;
DEBUG_PRINT(("RTL8139: +++ C+ mode transmission buffer allocated space %d\n", s->cplus_txbuffer_len));
}
while (s->cplus_txbuffer && s->cplus_txbuffer_offset + txsize >= s->cplus_txbuffer_len)
{
s->cplus_txbuffer_len += CP_TX_BUFFER_SIZE;
s->cplus_txbuffer = qemu_realloc(s->cplus_txbuffer, s->cplus_txbuffer_len);
DEBUG_PRINT(("RTL8139: +++ C+ mode transmission buffer space changed to %d\n", s->cplus_txbuffer_len));
}
if (!s->cplus_txbuffer)
{
/* out of memory */
DEBUG_PRINT(("RTL8139: +++ C+ mode transmiter failed to reallocate %d bytes\n", s->cplus_txbuffer_len));
/* update tally counter */
++s->tally_counters.TxERR;
++s->tally_counters.TxAbt;
return 0;
}
/* append more data to the packet */
DEBUG_PRINT(("RTL8139: +++ C+ mode transmit reading %d bytes from host memory at %016" PRIx64 " to offset %d\n",
txsize, (uint64_t)tx_addr, s->cplus_txbuffer_offset));
cpu_physical_memory_read(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);
cpu_physical_memory_write(cplus_tx_ring_desc, (uint8_t *)&val, 4);
/* TODO: implement VLAN tagging support, VLAN tag data is read to txdw1 */
// val = cpu_to_le32(txdw1);
// cpu_physical_memory_write(cplus_tx_ring_desc+4, &val, 4);
/* Now decide if descriptor being processed is holding the last segment of packet */
if (txdw0 & CP_TX_LS)
{
DEBUG_PRINT(("RTL8139: +++ 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;
/* 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))
{
DEBUG_PRINT(("RTL8139: +++ C+ mode offloaded task checksum\n"));
#define ETH_P_IP 0x0800 /* Internet Protocol packet */
#define ETH_HLEN 14
#define ETH_MTU 1500
/* ip packet header */
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)
{
DEBUG_PRINT(("RTL8139: +++ C+ mode has IP packet\n"));
/* not aligned */
eth_payload_data = saved_buffer + ETH_HLEN;
eth_payload_len = saved_size - ETH_HLEN;
ip = (ip_header*)eth_payload_data;
if (IP_HEADER_VERSION(ip) != IP_HEADER_VERSION_4) {
DEBUG_PRINT(("RTL8139: +++ C+ mode packet has bad IP version %d expected %d\n", IP_HEADER_VERSION(ip), IP_HEADER_VERSION_4));
ip = NULL;
} else {
hlen = IP_HEADER_LENGTH(ip);
ip_protocol = ip->ip_p;
ip_data_len = be16_to_cpu(ip->ip_len) - hlen;
}
}
if (ip)
{
if (txdw0 & CP_TX_IPCS)
{
DEBUG_PRINT(("RTL8139: +++ C+ mode need IP checksum\n"));
if (hlen<sizeof(ip_header) || hlen>eth_payload_len) {/* min header length */
/* bad packet header len */
/* or packet too short */
}
else
{
ip->ip_sum = 0;
ip->ip_sum = ip_checksum(ip, hlen);
DEBUG_PRINT(("RTL8139: +++ C+ mode IP header len=%d checksum=%04x\n", hlen, ip->ip_sum));
}
}
if ((txdw0 & CP_TX_LGSEN) && ip_protocol == IP_PROTO_TCP)
{
#if defined (DEBUG_RTL8139)
int large_send_mss = (txdw0 >> 16) & CP_TC_LGSEN_MSS_MASK;
#endif
DEBUG_PRINT(("RTL8139: +++ 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);
/* 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;
DEBUG_PRINT(("RTL8139: +++ 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;
}
DEBUG_PRINT(("RTL8139: +++ C+ mode TSO TCP seqno %08x\n", be32_to_cpu(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);
DEBUG_PRINT(("RTL8139: +++ 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, TCP_FLAG_PUSH|TCP_FLAG_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);
DEBUG_PRINT(("RTL8139: +++ 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);
DEBUG_PRINT(("RTL8139: +++ 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;
DEBUG_PRINT(("RTL8139: +++ C+ mode TSO transferring packet size %d\n", tso_send_size));
rtl8139_transfer_frame(s, saved_buffer, tso_send_size, 0);
/* add transferred count to TCP sequence number */
p_tcp_hdr->th_seq = cpu_to_be32(chunk_size + be32_to_cpu(p_tcp_hdr->th_seq));
++send_count;
}
/* Stop sending this frame */
saved_size = 0;
}
else if (txdw0 & (CP_TX_TCPCS|CP_TX_UDPCS))
{
DEBUG_PRINT(("RTL8139: +++ 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)
{
DEBUG_PRINT(("RTL8139: +++ 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);
DEBUG_PRINT(("RTL8139: +++ 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)
{
DEBUG_PRINT(("RTL8139: +++ 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);
DEBUG_PRINT(("RTL8139: +++ 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);
}
}
}
/* update tally counter */
++s->tally_counters.TxOk;
DEBUG_PRINT(("RTL8139: +++ C+ mode transmitting %d bytes packet\n", saved_size));
rtl8139_transfer_frame(s, saved_buffer, saved_size, 1);
/* 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
{
qemu_free(saved_buffer);
}
}
else
{
DEBUG_PRINT(("RTL8139: +++ 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)
{
DEBUG_PRINT(("RTL8139: 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)
{
DEBUG_PRINT(("RTL8139: 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)
{
DEBUG_PRINT(("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))
{
target_phys_addr_t tc_addr = rtl8139_addr64(s->TxStatus[0] & ~0x3f, s->TxStatus[1]);
/* dump tally counters to specified memory location */
RTL8139TallyCounters_physical_memory_write( tc_addr, &s->tally_counters);
/* mark dump completed */
s->TxStatus[0] &= ~0x8;
}
return;
}
DEBUG_PRINT(("RTL8139: 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_read(RTL8139State *s, uint32_t txRegOffset)
{
uint32_t ret = s->TxStatus[txRegOffset/4];
DEBUG_PRINT(("RTL8139: TxStatus read offset=0x%x val=0x%08x\n", txRegOffset, ret));
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) ;
DEBUG_PRINT(("RTL8139: TSAD read val=0x%04x\n", ret));
return ret;
}
static uint16_t rtl8139_CSCR_read(RTL8139State *s)
{
uint16_t ret = s->CSCR;
DEBUG_PRINT(("RTL8139: CSCR read val=0x%04x\n", ret));
return ret;
}
static void rtl8139_TxAddr_write(RTL8139State *s, uint32_t txAddrOffset, uint32_t val)
{
DEBUG_PRINT(("RTL8139: 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];
DEBUG_PRINT(("RTL8139: TxAddr read offset=0x%x val=0x%08x\n", txAddrOffset, ret));
return ret;
}
static void rtl8139_RxBufPtr_write(RTL8139State *s, uint32_t val)
{
DEBUG_PRINT(("RTL8139: RxBufPtr write val=0x%04x\n", val));
/* this value is off by 16 */
s->RxBufPtr = MOD2(val + 0x10, s->RxBufferSize);
DEBUG_PRINT((" 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;
DEBUG_PRINT(("RTL8139: 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;
DEBUG_PRINT(("RTL8139: RxBufAddr read val=0x%04x\n", ret));
return ret;
}
static void rtl8139_RxBuf_write(RTL8139State *s, uint32_t val)
{
DEBUG_PRINT(("RTL8139: 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;
DEBUG_PRINT(("RTL8139: RxBuf read val=0x%08x\n", ret));
return ret;
}
static void rtl8139_IntrMask_write(RTL8139State *s, uint32_t val)
{
DEBUG_PRINT(("RTL8139: IntrMask write(w) val=0x%04x\n", val));
/* mask unwriteable bits */
val = SET_MASKED(val, 0x1e00, s->IntrMask);
s->IntrMask = val;
rtl8139_set_next_tctr_time(s, qemu_get_clock(vm_clock));
rtl8139_update_irq(s);
}
static uint32_t rtl8139_IntrMask_read(RTL8139State *s)
{
uint32_t ret = s->IntrMask;
DEBUG_PRINT(("RTL8139: IntrMask read(w) val=0x%04x\n", ret));
return ret;
}
static void rtl8139_IntrStatus_write(RTL8139State *s, uint32_t val)
{
DEBUG_PRINT(("RTL8139: 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 unwriteable 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;
/*
* Computing if we miss an interrupt here is not that correct but
* considered that we should have had already an interrupt
* and probably emulated is slower is better to assume this resetting was
* done before testing on previous rtl8139_update_irq lead to IRQ loosing
*/
rtl8139_set_next_tctr_time(s, qemu_get_clock(vm_clock));
rtl8139_update_irq(s);
#endif
}
static uint32_t rtl8139_IntrStatus_read(RTL8139State *s)
{
rtl8139_set_next_tctr_time(s, qemu_get_clock(vm_clock));
uint32_t ret = s->IntrStatus;
DEBUG_PRINT(("RTL8139: 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)
{
DEBUG_PRINT(("RTL8139: MultiIntr write(w) val=0x%04x\n", val));
/* mask unwriteable bits */
val = SET_MASKED(val, 0xf000, s->MultiIntr);
s->MultiIntr = val;
}
static uint32_t rtl8139_MultiIntr_read(RTL8139State *s)
{
uint32_t ret = s->MultiIntr;
DEBUG_PRINT(("RTL8139: 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;
addr &= 0xff;
switch (addr)
{
case MAC0 ... MAC0+5:
s->phys[addr - MAC0] = val;
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 */
DEBUG_PRINT(("RTL8139: not implemented write(b) to MediaStatus val=0x%02x\n", val));
break;
case HltClk:
DEBUG_PRINT(("RTL8139: 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:
DEBUG_PRINT(("RTL8139C+ TxThresh write(b) val=0x%02x\n", val));
s->TxThresh = val;
break;
case TxPoll:
DEBUG_PRINT(("RTL8139C+ TxPoll write(b) val=0x%02x\n", val));
if (val & (1 << 7))
{
DEBUG_PRINT(("RTL8139C+ TxPoll high priority transmission (not implemented)\n"));
//rtl8139_cplus_transmit(s);
}
if (val & (1 << 6))
{
DEBUG_PRINT(("RTL8139C+ TxPoll normal priority transmission\n"));
rtl8139_cplus_transmit(s);
}
break;
default:
DEBUG_PRINT(("RTL8139: 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;
addr &= 0xfe;
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:
DEBUG_PRINT(("RTL8139: NWayAdvert write(w) val=0x%04x\n", val));
s->NWayAdvert = val;
break;
case NWayLPAR:
DEBUG_PRINT(("RTL8139: forbidden NWayLPAR write(w) val=0x%04x\n", val));
break;
case NWayExpansion:
DEBUG_PRINT(("RTL8139: 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:
DEBUG_PRINT(("RTL8139: 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, int64_t current_time)
{
int64_t pci_time, next_time;
uint32_t low_pci;
DEBUG_PRINT(("RTL8139: entered rtl8139_set_next_tctr_time\n"));
if (s->TimerExpire && current_time >= s->TimerExpire) {
s->IntrStatus |= PCSTimeout;
rtl8139_update_irq(s);
}
/* Set QEMU timer only if needed that is
* - TimerInt <> 0 (we have a timer)
* - mask = 1 (we want an interrupt timer)
* - irq = 0 (irq is not already active)
* If any of above change we need to compute timer again
* Also we must check if timer is passed without QEMU timer
*/
s->TimerExpire = 0;
if (!s->TimerInt) {
return;
}
pci_time = muldiv64(current_time - s->TCTR_base, PCI_FREQUENCY,
get_ticks_per_sec());
low_pci = pci_time & 0xffffffff;
pci_time = pci_time - low_pci + s->TimerInt;
if (low_pci >= s->TimerInt) {
pci_time += 0x100000000LL;
}
next_time = s->TCTR_base + muldiv64(pci_time, get_ticks_per_sec(),
PCI_FREQUENCY);
s->TimerExpire = next_time;
if ((s->IntrMask & PCSTimeout) != 0 && (s->IntrStatus & PCSTimeout) == 0) {
qemu_mod_timer(s->timer, next_time);
}
}
static void rtl8139_io_writel(void *opaque, uint8_t addr, uint32_t val)
{
RTL8139State *s = opaque;
addr &= 0xfc;
switch (addr)
{
case RxMissed:
DEBUG_PRINT(("RTL8139: 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:
DEBUG_PRINT(("RTL8139: C+ RxRing low bits write val=0x%08x\n", val));
s->RxRingAddrLO = val;
break;
case RxRingAddrHI:
DEBUG_PRINT(("RTL8139: C+ RxRing high bits write val=0x%08x\n", val));
s->RxRingAddrHI = val;
break;
case Timer:
DEBUG_PRINT(("RTL8139: TCTR Timer reset on write\n"));
s->TCTR_base = qemu_get_clock(vm_clock);
rtl8139_set_next_tctr_time(s, s->TCTR_base);
break;
case FlashReg:
DEBUG_PRINT(("RTL8139: FlashReg TimerInt write val=0x%08x\n", val));
if (s->TimerInt != val) {
s->TimerInt = val;
rtl8139_set_next_tctr_time(s, qemu_get_clock(vm_clock));
}
break;
default:
DEBUG_PRINT(("RTL8139: 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;
addr &= 0xff;
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 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:
ret = 0xd0;
DEBUG_PRINT(("RTL8139: MediaStatus read 0x%x\n", ret));
break;
case HltClk:
ret = s->clock_enabled;
DEBUG_PRINT(("RTL8139: HltClk read 0x%x\n", ret));
break;
case PCIRevisionID:
ret = RTL8139_PCI_REVID;
DEBUG_PRINT(("RTL8139: PCI Revision ID read 0x%x\n", ret));
break;
case TxThresh:
ret = s->TxThresh;
DEBUG_PRINT(("RTL8139C+ 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;
DEBUG_PRINT(("RTL8139C TxConfig at 0x43 read(b) val=0x%02x\n", ret));
break;
default:
DEBUG_PRINT(("RTL8139: 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;
addr &= 0xfe; /* mask lower bit */
switch (addr)
{
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;
DEBUG_PRINT(("RTL8139: NWayAdvert read(w) val=0x%04x\n", ret));
break;
case NWayLPAR:
ret = s->NWayLPAR;
DEBUG_PRINT(("RTL8139: NWayLPAR read(w) val=0x%04x\n", ret));
break;
case NWayExpansion:
ret = s->NWayExpansion;
DEBUG_PRINT(("RTL8139: 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:
DEBUG_PRINT(("RTL8139: 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;
DEBUG_PRINT(("RTL8139: 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;
addr &= 0xfc; /* also mask low 2 bits */
switch (addr)
{
case RxMissed:
ret = s->RxMissed;
DEBUG_PRINT(("RTL8139: 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_read(s, addr-TxStatus0);
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;
DEBUG_PRINT(("RTL8139: C+ RxRing low bits read val=0x%08x\n", ret));
break;
case RxRingAddrHI:
ret = s->RxRingAddrHI;
DEBUG_PRINT(("RTL8139: C+ RxRing high bits read val=0x%08x\n", ret));
break;
case Timer:
ret = muldiv64(qemu_get_clock(vm_clock) - s->TCTR_base,
PCI_FREQUENCY, get_ticks_per_sec());
DEBUG_PRINT(("RTL8139: TCTR Timer read val=0x%08x\n", ret));
break;
case FlashReg:
ret = s->TimerInt;
DEBUG_PRINT(("RTL8139: FlashReg TimerInt read val=0x%08x\n", ret));
break;
default:
DEBUG_PRINT(("RTL8139: 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;
DEBUG_PRINT(("RTL8139: read(l) addr=0x%x val=%08x\n", addr, ret));
break;
}
return ret;
}
/* */
static void rtl8139_ioport_writeb(void *opaque, uint32_t addr, uint32_t val)
{
rtl8139_io_writeb(opaque, addr & 0xFF, val);
}
static void rtl8139_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
{
rtl8139_io_writew(opaque, addr & 0xFF, val);
}
static void rtl8139_ioport_writel(void *opaque, uint32_t addr, uint32_t val)
{
rtl8139_io_writel(opaque, addr & 0xFF, val);
}
static uint32_t rtl8139_ioport_readb(void *opaque, uint32_t addr)
{
return rtl8139_io_readb(opaque, addr & 0xFF);
}
static uint32_t rtl8139_ioport_readw(void *opaque, uint32_t addr)
{
return rtl8139_io_readw(opaque, addr & 0xFF);
}
static uint32_t rtl8139_ioport_readl(void *opaque, uint32_t addr)
{
return rtl8139_io_readl(opaque, addr & 0xFF);
}
/* */
static void rtl8139_mmio_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
{
rtl8139_io_writeb(opaque, addr & 0xFF, val);
}
static void rtl8139_mmio_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
{
#ifdef TARGET_WORDS_BIGENDIAN
val = bswap16(val);
#endif
rtl8139_io_writew(opaque, addr & 0xFF, val);
}
static void rtl8139_mmio_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
{
#ifdef TARGET_WORDS_BIGENDIAN
val = bswap32(val);
#endif
rtl8139_io_writel(opaque, addr & 0xFF, val);
}
static uint32_t rtl8139_mmio_readb(void *opaque, target_phys_addr_t addr)
{
return rtl8139_io_readb(opaque, addr & 0xFF);
}
static uint32_t rtl8139_mmio_readw(void *opaque, target_phys_addr_t addr)
{
uint32_t val = rtl8139_io_readw(opaque, addr & 0xFF);
#ifdef TARGET_WORDS_BIGENDIAN
val = bswap16(val);
#endif
return val;
}
static uint32_t rtl8139_mmio_readl(void *opaque, target_phys_addr_t addr)
{
uint32_t val = rtl8139_io_readl(opaque, addr & 0xFF);
#ifdef TARGET_WORDS_BIGENDIAN
val = bswap32(val);
#endif
return val;
}
static int rtl8139_post_load(void *opaque, int version_id)
{
RTL8139State* s = opaque;
rtl8139_set_next_tctr_time(s, qemu_get_clock(vm_clock));
if (version_id < 4) {
s->cplus_enabled = s->CpCmd != 0;
}
return 0;
}
static void rtl8139_pre_save(void *opaque)
{
RTL8139State* s = opaque;
int64_t current_time = qemu_get_clock(vm_clock);
/* set IntrStatus correctly */
rtl8139_set_next_tctr_time(s, current_time);
s->TCTR = muldiv64(current_time - s->TCTR_base, PCI_FREQUENCY,
get_ticks_per_sec());
}
static const VMStateDescription vmstate_rtl8139 = {
.name = "rtl8139",
.version_id = 4,
.minimum_version_id = 3,
.minimum_version_id_old = 3,
.post_load = rtl8139_post_load,
.pre_save = rtl8139_pre_save,
.fields = (VMStateField []) {
VMSTATE_PCI_DEVICE(dev, 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, 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()
}
};
/***********************************************************/
/* PCI RTL8139 definitions */
static void rtl8139_mmio_map(PCIDevice *pci_dev, int region_num,
pcibus_t addr, pcibus_t size, int type)
{
RTL8139State *s = DO_UPCAST(RTL8139State, dev, pci_dev);
cpu_register_physical_memory(addr + 0, 0x100, s->rtl8139_mmio_io_addr);
}
static void rtl8139_ioport_map(PCIDevice *pci_dev, int region_num,
pcibus_t addr, pcibus_t size, int type)
{
RTL8139State *s = DO_UPCAST(RTL8139State, dev, pci_dev);
register_ioport_write(addr, 0x100, 1, rtl8139_ioport_writeb, s);
register_ioport_read( addr, 0x100, 1, rtl8139_ioport_readb, s);
register_ioport_write(addr, 0x100, 2, rtl8139_ioport_writew, s);
register_ioport_read( addr, 0x100, 2, rtl8139_ioport_readw, s);
register_ioport_write(addr, 0x100, 4, rtl8139_ioport_writel, s);
register_ioport_read( addr, 0x100, 4, rtl8139_ioport_readl, s);
}
static CPUReadMemoryFunc * const rtl8139_mmio_read[3] = {
rtl8139_mmio_readb,
rtl8139_mmio_readw,
rtl8139_mmio_readl,
};
static CPUWriteMemoryFunc * const rtl8139_mmio_write[3] = {
rtl8139_mmio_writeb,
rtl8139_mmio_writew,
rtl8139_mmio_writel,
};
static void rtl8139_timer(void *opaque)
{
RTL8139State *s = opaque;
if (!s->clock_enabled)
{
DEBUG_PRINT(("RTL8139: >>> timer: clock is not running\n"));
return;
}
s->IntrStatus |= PCSTimeout;
rtl8139_update_irq(s);
rtl8139_set_next_tctr_time(s, qemu_get_clock(vm_clock));
}
static void rtl8139_cleanup(VLANClientState *nc)
{
RTL8139State *s = DO_UPCAST(NICState, nc, nc)->opaque;
s->nic = NULL;
}
static int pci_rtl8139_uninit(PCIDevice *dev)
{
RTL8139State *s = DO_UPCAST(RTL8139State, dev, dev);
cpu_unregister_io_memory(s->rtl8139_mmio_io_addr);
if (s->cplus_txbuffer) {
qemu_free(s->cplus_txbuffer);
s->cplus_txbuffer = NULL;
}
qemu_del_timer(s->timer);
qemu_free_timer(s->timer);
qemu_del_vlan_client(&s->nic->nc);
return 0;
}
static NetClientInfo net_rtl8139_info = {
.type = NET_CLIENT_TYPE_NIC,
.size = sizeof(NICState),
.can_receive = rtl8139_can_receive,
.receive = rtl8139_receive,
.cleanup = rtl8139_cleanup,
};
static int pci_rtl8139_init(PCIDevice *dev)
{
RTL8139State * s = DO_UPCAST(RTL8139State, dev, dev);
uint8_t *pci_conf;
pci_conf = s->dev.config;
pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_REALTEK);
pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_REALTEK_8139);
/* TODO: value should be 0 at RST#. */
pci_conf[PCI_COMMAND] = PCI_COMMAND_IO | PCI_COMMAND_MASTER;
pci_conf[PCI_REVISION_ID] = RTL8139_PCI_REVID; /* >=0x20 is for 8139C+ */
pci_config_set_class(pci_conf, PCI_CLASS_NETWORK_ETHERNET);
pci_conf[PCI_HEADER_TYPE] = PCI_HEADER_TYPE_NORMAL;
/* TODO: value should be 0 at RST# */
pci_conf[PCI_INTERRUPT_PIN] = 1; /* interrupt pin 0 */
/* TODO: start of capability list, but no capability
* list bit in status register, and offset 0xdc seems unused. */
pci_conf[PCI_CAPABILITY_LIST] = 0xdc;
/* I/O handler for memory-mapped I/O */
s->rtl8139_mmio_io_addr =
cpu_register_io_memory(rtl8139_mmio_read, rtl8139_mmio_write, s);
pci_register_bar(&s->dev, 0, 0x100,
PCI_BASE_ADDRESS_SPACE_IO, rtl8139_ioport_map);
pci_register_bar(&s->dev, 1, 0x100,
PCI_BASE_ADDRESS_SPACE_MEMORY, rtl8139_mmio_map);
qemu_macaddr_default_if_unset(&s->conf.macaddr);
s->nic = qemu_new_nic(&net_rtl8139_info, &s->conf,
dev->qdev.info->name, dev->qdev.id, s);
qemu_format_nic_info_str(&s->nic->nc, s->conf.macaddr.a);
s->cplus_txbuffer = NULL;
s->cplus_txbuffer_len = 0;
s->cplus_txbuffer_offset = 0;
s->TimerExpire = 0;
s->timer = qemu_new_timer(vm_clock, rtl8139_timer, s);
rtl8139_set_next_tctr_time(s, qemu_get_clock(vm_clock));
return 0;
}
static PCIDeviceInfo rtl8139_info = {
.qdev.name = "rtl8139",
.qdev.size = sizeof(RTL8139State),
.qdev.reset = rtl8139_reset,
.qdev.vmsd = &vmstate_rtl8139,
.init = pci_rtl8139_init,
.exit = pci_rtl8139_uninit,
.romfile = "pxe-rtl8139.bin",
.qdev.props = (Property[]) {
DEFINE_NIC_PROPERTIES(RTL8139State, conf),
DEFINE_PROP_END_OF_LIST(),
}
};
static void rtl8139_register_devices(void)
{
pci_qdev_register(&rtl8139_info);
}
device_init(rtl8139_register_devices)
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