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Merge remote branch 'mst/for_anthony' into staging
[qemu.git] / hw / rtl8139.c
blobd92981dc0d351b8befc630d5ce8f00ed50a105c0
1 /**
2 * QEMU RTL8139 emulation
3 *
4 * Copyright (c) 2006 Igor Kovalenko
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23
24 * Modifications:
25 * 2006-Jan-28 Mark Malakanov : TSAD and CSCR implementation (for Windows driver)
26 *
27 * 2006-Apr-28 Juergen Lock : EEPROM emulation changes for FreeBSD driver
28 * HW revision ID changes for FreeBSD driver
29 *
30 * 2006-Jul-01 Igor Kovalenko : Implemented loopback mode for FreeBSD driver
31 * Corrected packet transfer reassembly routine for 8139C+ mode
32 * Rearranged debugging print statements
33 * Implemented PCI timer interrupt (disabled by default)
34 * Implemented Tally Counters, increased VM load/save version
35 * Implemented IP/TCP/UDP checksum task offloading
36 *
37 * 2006-Jul-04 Igor Kovalenko : Implemented TCP segmentation offloading
38 * Fixed MTU=1500 for produced ethernet frames
39 *
40 * 2006-Jul-09 Igor Kovalenko : Fixed TCP header length calculation while processing
41 * segmentation offloading
42 * Removed slirp.h dependency
43 * Added rx/tx buffer reset when enabling rx/tx operation
44 *
45 * 2010-Feb-04 Frediano Ziglio: Rewrote timer support using QEMU timer only
46 * when strictly needed (required for for
47 * Darwin)
48 */
49
50 #include "hw.h"
51 #include "pci.h"
52 #include "qemu-timer.h"
53 #include "net.h"
54 #include "loader.h"
55
56 /* debug RTL8139 card */
57 //#define DEBUG_RTL8139 1
58
59 #define PCI_FREQUENCY 33000000L
60
61 /* debug RTL8139 card C+ mode only */
62 //#define DEBUG_RTL8139CP 1
63
64 /* Calculate CRCs properly on Rx packets */
65 #define RTL8139_CALCULATE_RXCRC 1
66
67 #if defined(RTL8139_CALCULATE_RXCRC)
68 /* For crc32 */
69 #include <zlib.h>
70 #endif
71
72 #define SET_MASKED(input, mask, curr) \
73 ( ( (input) & ~(mask) ) | ( (curr) & (mask) ) )
74
75 /* arg % size for size which is a power of 2 */
76 #define MOD2(input, size) \
77 ( ( input ) & ( size - 1 ) )
78
79 #if defined (DEBUG_RTL8139)
80 # define DEBUG_PRINT(x) do { printf x ; } while (0)
81 #else
82 # define DEBUG_PRINT(x)
83 #endif
84
85 /* Symbolic offsets to registers. */
86 enum RTL8139_registers {
87 MAC0 = 0, /* Ethernet hardware address. */
88 MAR0 = 8, /* Multicast filter. */
89 TxStatus0 = 0x10,/* Transmit status (Four 32bit registers). C mode only */
90 /* Dump Tally Conter control register(64bit). C+ mode only */
91 TxAddr0 = 0x20, /* Tx descriptors (also four 32bit). */
92 RxBuf = 0x30,
93 ChipCmd = 0x37,
94 RxBufPtr = 0x38,
95 RxBufAddr = 0x3A,
96 IntrMask = 0x3C,
97 IntrStatus = 0x3E,
98 TxConfig = 0x40,
99 RxConfig = 0x44,
100 Timer = 0x48, /* A general-purpose counter. */
101 RxMissed = 0x4C, /* 24 bits valid, write clears. */
102 Cfg9346 = 0x50,
103 Config0 = 0x51,
104 Config1 = 0x52,
105 FlashReg = 0x54,
106 MediaStatus = 0x58,
107 Config3 = 0x59,
108 Config4 = 0x5A, /* absent on RTL-8139A */
109 HltClk = 0x5B,
110 MultiIntr = 0x5C,
111 PCIRevisionID = 0x5E,
112 TxSummary = 0x60, /* TSAD register. Transmit Status of All Descriptors*/
113 BasicModeCtrl = 0x62,
114 BasicModeStatus = 0x64,
115 NWayAdvert = 0x66,
116 NWayLPAR = 0x68,
117 NWayExpansion = 0x6A,
118 /* Undocumented registers, but required for proper operation. */
119 FIFOTMS = 0x70, /* FIFO Control and test. */
120 CSCR = 0x74, /* Chip Status and Configuration Register. */
121 PARA78 = 0x78,
122 PARA7c = 0x7c, /* Magic transceiver parameter register. */
123 Config5 = 0xD8, /* absent on RTL-8139A */
124 /* C+ mode */
125 TxPoll = 0xD9, /* Tell chip to check Tx descriptors for work */
126 RxMaxSize = 0xDA, /* Max size of an Rx packet (8169 only) */
127 CpCmd = 0xE0, /* C+ Command register (C+ mode only) */
128 IntrMitigate = 0xE2, /* rx/tx interrupt mitigation control */
129 RxRingAddrLO = 0xE4, /* 64-bit start addr of Rx ring */
130 RxRingAddrHI = 0xE8, /* 64-bit start addr of Rx ring */
131 TxThresh = 0xEC, /* Early Tx threshold */
132 };
133
134 enum ClearBitMasks {
135 MultiIntrClear = 0xF000,
136 ChipCmdClear = 0xE2,
137 Config1Clear = (1<<7)|(1<<6)|(1<<3)|(1<<2)|(1<<1),
138 };
139
140 enum ChipCmdBits {
141 CmdReset = 0x10,
142 CmdRxEnb = 0x08,
143 CmdTxEnb = 0x04,
144 RxBufEmpty = 0x01,
145 };
146
147 /* C+ mode */
148 enum CplusCmdBits {
149 CPlusRxVLAN = 0x0040, /* enable receive VLAN detagging */
150 CPlusRxChkSum = 0x0020, /* enable receive checksum offloading */
151 CPlusRxEnb = 0x0002,
152 CPlusTxEnb = 0x0001,
153 };
154
155 /* Interrupt register bits, using my own meaningful names. */
156 enum IntrStatusBits {
157 PCIErr = 0x8000,
158 PCSTimeout = 0x4000,
159 RxFIFOOver = 0x40,
160 RxUnderrun = 0x20,
161 RxOverflow = 0x10,
162 TxErr = 0x08,
163 TxOK = 0x04,
164 RxErr = 0x02,
165 RxOK = 0x01,
166
167 RxAckBits = RxFIFOOver | RxOverflow | RxOK,
168 };
169
170 enum TxStatusBits {
171 TxHostOwns = 0x2000,
172 TxUnderrun = 0x4000,
173 TxStatOK = 0x8000,
174 TxOutOfWindow = 0x20000000,
175 TxAborted = 0x40000000,
176 TxCarrierLost = 0x80000000,
177 };
178 enum RxStatusBits {
179 RxMulticast = 0x8000,
180 RxPhysical = 0x4000,
181 RxBroadcast = 0x2000,
182 RxBadSymbol = 0x0020,
183 RxRunt = 0x0010,
184 RxTooLong = 0x0008,
185 RxCRCErr = 0x0004,
186 RxBadAlign = 0x0002,
187 RxStatusOK = 0x0001,
188 };
189
190 /* Bits in RxConfig. */
191 enum rx_mode_bits {
192 AcceptErr = 0x20,
193 AcceptRunt = 0x10,
194 AcceptBroadcast = 0x08,
195 AcceptMulticast = 0x04,
196 AcceptMyPhys = 0x02,
197 AcceptAllPhys = 0x01,
198 };
199
200 /* Bits in TxConfig. */
201 enum tx_config_bits {
202
203 /* Interframe Gap Time. Only TxIFG96 doesn't violate IEEE 802.3 */
204 TxIFGShift = 24,
205 TxIFG84 = (0 << TxIFGShift), /* 8.4us / 840ns (10 / 100Mbps) */
206 TxIFG88 = (1 << TxIFGShift), /* 8.8us / 880ns (10 / 100Mbps) */
207 TxIFG92 = (2 << TxIFGShift), /* 9.2us / 920ns (10 / 100Mbps) */
208 TxIFG96 = (3 << TxIFGShift), /* 9.6us / 960ns (10 / 100Mbps) */
209
210 TxLoopBack = (1 << 18) | (1 << 17), /* enable loopback test mode */
211 TxCRC = (1 << 16), /* DISABLE appending CRC to end of Tx packets */
212 TxClearAbt = (1 << 0), /* Clear abort (WO) */
213 TxDMAShift = 8, /* DMA burst value (0-7) is shifted this many bits */
214 TxRetryShift = 4, /* TXRR value (0-15) is shifted this many bits */
215
216 TxVersionMask = 0x7C800000, /* mask out version bits 30-26, 23 */
217 };
218
219
220 /* Transmit Status of All Descriptors (TSAD) Register */
221 enum TSAD_bits {
222 TSAD_TOK3 = 1<<15, // TOK bit of Descriptor 3
223 TSAD_TOK2 = 1<<14, // TOK bit of Descriptor 2
224 TSAD_TOK1 = 1<<13, // TOK bit of Descriptor 1
225 TSAD_TOK0 = 1<<12, // TOK bit of Descriptor 0
226 TSAD_TUN3 = 1<<11, // TUN bit of Descriptor 3
227 TSAD_TUN2 = 1<<10, // TUN bit of Descriptor 2
228 TSAD_TUN1 = 1<<9, // TUN bit of Descriptor 1
229 TSAD_TUN0 = 1<<8, // TUN bit of Descriptor 0
230 TSAD_TABT3 = 1<<07, // TABT bit of Descriptor 3
231 TSAD_TABT2 = 1<<06, // TABT bit of Descriptor 2
232 TSAD_TABT1 = 1<<05, // TABT bit of Descriptor 1
233 TSAD_TABT0 = 1<<04, // TABT bit of Descriptor 0
234 TSAD_OWN3 = 1<<03, // OWN bit of Descriptor 3
235 TSAD_OWN2 = 1<<02, // OWN bit of Descriptor 2
236 TSAD_OWN1 = 1<<01, // OWN bit of Descriptor 1
237 TSAD_OWN0 = 1<<00, // OWN bit of Descriptor 0
238 };
239
240
241 /* Bits in Config1 */
242 enum Config1Bits {
243 Cfg1_PM_Enable = 0x01,
244 Cfg1_VPD_Enable = 0x02,
245 Cfg1_PIO = 0x04,
246 Cfg1_MMIO = 0x08,
247 LWAKE = 0x10, /* not on 8139, 8139A */
248 Cfg1_Driver_Load = 0x20,
249 Cfg1_LED0 = 0x40,
250 Cfg1_LED1 = 0x80,
251 SLEEP = (1 << 1), /* only on 8139, 8139A */
252 PWRDN = (1 << 0), /* only on 8139, 8139A */
253 };
254
255 /* Bits in Config3 */
256 enum Config3Bits {
257 Cfg3_FBtBEn = (1 << 0), /* 1 = Fast Back to Back */
258 Cfg3_FuncRegEn = (1 << 1), /* 1 = enable CardBus Function registers */
259 Cfg3_CLKRUN_En = (1 << 2), /* 1 = enable CLKRUN */
260 Cfg3_CardB_En = (1 << 3), /* 1 = enable CardBus registers */
261 Cfg3_LinkUp = (1 << 4), /* 1 = wake up on link up */
262 Cfg3_Magic = (1 << 5), /* 1 = wake up on Magic Packet (tm) */
263 Cfg3_PARM_En = (1 << 6), /* 0 = software can set twister parameters */
264 Cfg3_GNTSel = (1 << 7), /* 1 = delay 1 clock from PCI GNT signal */
265 };
266
267 /* Bits in Config4 */
268 enum Config4Bits {
269 LWPTN = (1 << 2), /* not on 8139, 8139A */
270 };
271
272 /* Bits in Config5 */
273 enum Config5Bits {
274 Cfg5_PME_STS = (1 << 0), /* 1 = PCI reset resets PME_Status */
275 Cfg5_LANWake = (1 << 1), /* 1 = enable LANWake signal */
276 Cfg5_LDPS = (1 << 2), /* 0 = save power when link is down */
277 Cfg5_FIFOAddrPtr = (1 << 3), /* Realtek internal SRAM testing */
278 Cfg5_UWF = (1 << 4), /* 1 = accept unicast wakeup frame */
279 Cfg5_MWF = (1 << 5), /* 1 = accept multicast wakeup frame */
280 Cfg5_BWF = (1 << 6), /* 1 = accept broadcast wakeup frame */
281 };
282
283 enum RxConfigBits {
284 /* rx fifo threshold */
285 RxCfgFIFOShift = 13,
286 RxCfgFIFONone = (7 << RxCfgFIFOShift),
287
288 /* Max DMA burst */
289 RxCfgDMAShift = 8,
290 RxCfgDMAUnlimited = (7 << RxCfgDMAShift),
291
292 /* rx ring buffer length */
293 RxCfgRcv8K = 0,
294 RxCfgRcv16K = (1 << 11),
295 RxCfgRcv32K = (1 << 12),
296 RxCfgRcv64K = (1 << 11) | (1 << 12),
297
298 /* Disable packet wrap at end of Rx buffer. (not possible with 64k) */
299 RxNoWrap = (1 << 7),
300 };
301
302 /* Twister tuning parameters from RealTek.
303 Completely undocumented, but required to tune bad links on some boards. */
304 /*
305 enum CSCRBits {
306 CSCR_LinkOKBit = 0x0400,
307 CSCR_LinkChangeBit = 0x0800,
308 CSCR_LinkStatusBits = 0x0f000,
309 CSCR_LinkDownOffCmd = 0x003c0,
310 CSCR_LinkDownCmd = 0x0f3c0,
311 */
312 enum CSCRBits {
313 CSCR_Testfun = 1<<15, /* 1 = Auto-neg speeds up internal timer, WO, def 0 */
314 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*/
315 CSCR_HEART_BIT = 1<<8, /* 1 = HEART BEAT enable, 0 = HEART BEAT disable. HEART BEAT function is only valid in 10Mbps mode. def 1*/
316 CSCR_JBEN = 1<<7, /* 1 = enable jabber function. 0 = disable jabber function, def 1*/
317 CSCR_F_LINK_100 = 1<<6, /* Used to login force good link in 100Mbps for diagnostic purposes. 1 = DISABLE, 0 = ENABLE. def 1*/
318 CSCR_F_Connect = 1<<5, /* Assertion of this bit forces the disconnect function to be bypassed. def 0*/
319 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*/
320 CSCR_Con_status_En = 1<<2, /* Assertion of this bit configures LED1 pin to indicate connection status. def 0*/
321 CSCR_PASS_SCR = 1<<0, /* Bypass Scramble, def 0*/
322 };
323
324 enum Cfg9346Bits {
325 Cfg9346_Lock = 0x00,
326 Cfg9346_Unlock = 0xC0,
327 };
328
329 typedef enum {
330 CH_8139 = 0,
331 CH_8139_K,
332 CH_8139A,
333 CH_8139A_G,
334 CH_8139B,
335 CH_8130,
336 CH_8139C,
337 CH_8100,
338 CH_8100B_8139D,
339 CH_8101,
340 } chip_t;
341
342 enum chip_flags {
343 HasHltClk = (1 << 0),
344 HasLWake = (1 << 1),
345 };
346
347 #define HW_REVID(b30, b29, b28, b27, b26, b23, b22) \
348 (b30<<30 | b29<<29 | b28<<28 | b27<<27 | b26<<26 | b23<<23 | b22<<22)
349 #define HW_REVID_MASK HW_REVID(1, 1, 1, 1, 1, 1, 1)
350
351 #define RTL8139_PCI_REVID_8139 0x10
352 #define RTL8139_PCI_REVID_8139CPLUS 0x20
353
354 #define RTL8139_PCI_REVID RTL8139_PCI_REVID_8139CPLUS
355
356 /* Size is 64 * 16bit words */
357 #define EEPROM_9346_ADDR_BITS 6
358 #define EEPROM_9346_SIZE (1 << EEPROM_9346_ADDR_BITS)
359 #define EEPROM_9346_ADDR_MASK (EEPROM_9346_SIZE - 1)
360
361 enum Chip9346Operation
362 {
363 Chip9346_op_mask = 0xc0, /* 10 zzzzzz */
364 Chip9346_op_read = 0x80, /* 10 AAAAAA */
365 Chip9346_op_write = 0x40, /* 01 AAAAAA D(15)..D(0) */
366 Chip9346_op_ext_mask = 0xf0, /* 11 zzzzzz */
367 Chip9346_op_write_enable = 0x30, /* 00 11zzzz */
368 Chip9346_op_write_all = 0x10, /* 00 01zzzz */
369 Chip9346_op_write_disable = 0x00, /* 00 00zzzz */
370 };
371
372 enum Chip9346Mode
373 {
374 Chip9346_none = 0,
375 Chip9346_enter_command_mode,
376 Chip9346_read_command,
377 Chip9346_data_read, /* from output register */
378 Chip9346_data_write, /* to input register, then to contents at specified address */
379 Chip9346_data_write_all, /* to input register, then filling contents */
380 };
381
382 typedef struct EEprom9346
383 {
384 uint16_t contents[EEPROM_9346_SIZE];
385 int mode;
386 uint32_t tick;
387 uint8_t address;
388 uint16_t input;
389 uint16_t output;
390
391 uint8_t eecs;
392 uint8_t eesk;
393 uint8_t eedi;
394 uint8_t eedo;
395 } EEprom9346;
396
397 typedef struct RTL8139TallyCounters
398 {
399 /* Tally counters */
400 uint64_t TxOk;
401 uint64_t RxOk;
402 uint64_t TxERR;
403 uint32_t RxERR;
404 uint16_t MissPkt;
405 uint16_t FAE;
406 uint32_t Tx1Col;
407 uint32_t TxMCol;
408 uint64_t RxOkPhy;
409 uint64_t RxOkBrd;
410 uint32_t RxOkMul;
411 uint16_t TxAbt;
412 uint16_t TxUndrn;
413 } RTL8139TallyCounters;
414
415 /* Clears all tally counters */
416 static void RTL8139TallyCounters_clear(RTL8139TallyCounters* counters);
417
418 /* Writes tally counters to specified physical memory address */
419 static void RTL8139TallyCounters_physical_memory_write(target_phys_addr_t tc_addr, RTL8139TallyCounters* counters);
420
421 typedef struct RTL8139State {
422 PCIDevice dev;
423 uint8_t phys[8]; /* mac address */
424 uint8_t mult[8]; /* multicast mask array */
425
426 uint32_t TxStatus[4]; /* TxStatus0 in C mode*/ /* also DTCCR[0] and DTCCR[1] in C+ mode */
427 uint32_t TxAddr[4]; /* TxAddr0 */
428 uint32_t RxBuf; /* Receive buffer */
429 uint32_t RxBufferSize;/* internal variable, receive ring buffer size in C mode */
430 uint32_t RxBufPtr;
431 uint32_t RxBufAddr;
432
433 uint16_t IntrStatus;
434 uint16_t IntrMask;
435
436 uint32_t TxConfig;
437 uint32_t RxConfig;
438 uint32_t RxMissed;
439
440 uint16_t CSCR;
441
442 uint8_t Cfg9346;
443 uint8_t Config0;
444 uint8_t Config1;
445 uint8_t Config3;
446 uint8_t Config4;
447 uint8_t Config5;
448
449 uint8_t clock_enabled;
450 uint8_t bChipCmdState;
451
452 uint16_t MultiIntr;
453
454 uint16_t BasicModeCtrl;
455 uint16_t BasicModeStatus;
456 uint16_t NWayAdvert;
457 uint16_t NWayLPAR;
458 uint16_t NWayExpansion;
459
460 uint16_t CpCmd;
461 uint8_t TxThresh;
462
463 NICState *nic;
464 NICConf conf;
465 int rtl8139_mmio_io_addr;
466
467 /* C ring mode */
468 uint32_t currTxDesc;
469
470 /* C+ mode */
471 uint32_t cplus_enabled;
472
473 uint32_t currCPlusRxDesc;
474 uint32_t currCPlusTxDesc;
475
476 uint32_t RxRingAddrLO;
477 uint32_t RxRingAddrHI;
478
479 EEprom9346 eeprom;
480
481 uint32_t TCTR;
482 uint32_t TimerInt;
483 int64_t TCTR_base;
484
485 /* Tally counters */
486 RTL8139TallyCounters tally_counters;
487
488 /* Non-persistent data */
489 uint8_t *cplus_txbuffer;
490 int cplus_txbuffer_len;
491 int cplus_txbuffer_offset;
492
493 /* PCI interrupt timer */
494 QEMUTimer *timer;
495 int64_t TimerExpire;
496
497 } RTL8139State;
498
499 static void rtl8139_set_next_tctr_time(RTL8139State *s, int64_t current_time);
500
501 static void prom9346_decode_command(EEprom9346 *eeprom, uint8_t command)
502 {
503 DEBUG_PRINT(("RTL8139: eeprom command 0x%02x\n", command));
504
505 switch (command & Chip9346_op_mask)
506 {
507 case Chip9346_op_read:
508 {
509 eeprom->address = command & EEPROM_9346_ADDR_MASK;
510 eeprom->output = eeprom->contents[eeprom->address];
511 eeprom->eedo = 0;
512 eeprom->tick = 0;
513 eeprom->mode = Chip9346_data_read;
514 DEBUG_PRINT(("RTL8139: eeprom read from address 0x%02x data=0x%04x\n",
515 eeprom->address, eeprom->output));
516 }
517 break;
518
519 case Chip9346_op_write:
520 {
521 eeprom->address = command & EEPROM_9346_ADDR_MASK;
522 eeprom->input = 0;
523 eeprom->tick = 0;
524 eeprom->mode = Chip9346_none; /* Chip9346_data_write */
525 DEBUG_PRINT(("RTL8139: eeprom begin write to address 0x%02x\n",
526 eeprom->address));
527 }
528 break;
529 default:
530 eeprom->mode = Chip9346_none;
531 switch (command & Chip9346_op_ext_mask)
532 {
533 case Chip9346_op_write_enable:
534 DEBUG_PRINT(("RTL8139: eeprom write enabled\n"));
535 break;
536 case Chip9346_op_write_all:
537 DEBUG_PRINT(("RTL8139: eeprom begin write all\n"));
538 break;
539 case Chip9346_op_write_disable:
540 DEBUG_PRINT(("RTL8139: eeprom write disabled\n"));
541 break;
542 }
543 break;
544 }
545 }
546
547 static void prom9346_shift_clock(EEprom9346 *eeprom)
548 {
549 int bit = eeprom->eedi?1:0;
550
551 ++ eeprom->tick;
552
553 DEBUG_PRINT(("eeprom: tick %d eedi=%d eedo=%d\n", eeprom->tick, eeprom->eedi, eeprom->eedo));
554
555 switch (eeprom->mode)
556 {
557 case Chip9346_enter_command_mode:
558 if (bit)
559 {
560 eeprom->mode = Chip9346_read_command;
561 eeprom->tick = 0;
562 eeprom->input = 0;
563 DEBUG_PRINT(("eeprom: +++ synchronized, begin command read\n"));
564 }
565 break;
566
567 case Chip9346_read_command:
568 eeprom->input = (eeprom->input << 1) | (bit & 1);
569 if (eeprom->tick == 8)
570 {
571 prom9346_decode_command(eeprom, eeprom->input & 0xff);
572 }
573 break;
574
575 case Chip9346_data_read:
576 eeprom->eedo = (eeprom->output & 0x8000)?1:0;
577 eeprom->output <<= 1;
578 if (eeprom->tick == 16)
579 {
580 #if 1
581 // the FreeBSD drivers (rl and re) don't explicitly toggle
582 // CS between reads (or does setting Cfg9346 to 0 count too?),
583 // so we need to enter wait-for-command state here
584 eeprom->mode = Chip9346_enter_command_mode;
585 eeprom->input = 0;
586 eeprom->tick = 0;
587
588 DEBUG_PRINT(("eeprom: +++ end of read, awaiting next command\n"));
589 #else
590 // original behaviour
591 ++eeprom->address;
592 eeprom->address &= EEPROM_9346_ADDR_MASK;
593 eeprom->output = eeprom->contents[eeprom->address];
594 eeprom->tick = 0;
595
596 DEBUG_PRINT(("eeprom: +++ read next address 0x%02x data=0x%04x\n",
597 eeprom->address, eeprom->output));
598 #endif
599 }
600 break;
601
602 case Chip9346_data_write:
603 eeprom->input = (eeprom->input << 1) | (bit & 1);
604 if (eeprom->tick == 16)
605 {
606 DEBUG_PRINT(("RTL8139: eeprom write to address 0x%02x data=0x%04x\n",
607 eeprom->address, eeprom->input));
608
609 eeprom->contents[eeprom->address] = eeprom->input;
610 eeprom->mode = Chip9346_none; /* waiting for next command after CS cycle */
611 eeprom->tick = 0;
612 eeprom->input = 0;
613 }
614 break;
615
616 case Chip9346_data_write_all:
617 eeprom->input = (eeprom->input << 1) | (bit & 1);
618 if (eeprom->tick == 16)
619 {
620 int i;
621 for (i = 0; i < EEPROM_9346_SIZE; i++)
622 {
623 eeprom->contents[i] = eeprom->input;
624 }
625 DEBUG_PRINT(("RTL8139: eeprom filled with data=0x%04x\n",
626 eeprom->input));
627
628 eeprom->mode = Chip9346_enter_command_mode;
629 eeprom->tick = 0;
630 eeprom->input = 0;
631 }
632 break;
633
634 default:
635 break;
636 }
637 }
638
639 static int prom9346_get_wire(RTL8139State *s)
640 {
641 EEprom9346 *eeprom = &s->eeprom;
642 if (!eeprom->eecs)
643 return 0;
644
645 return eeprom->eedo;
646 }
647
648 /* FIXME: This should be merged into/replaced by eeprom93xx.c. */
649 static void prom9346_set_wire(RTL8139State *s, int eecs, int eesk, int eedi)
650 {
651 EEprom9346 *eeprom = &s->eeprom;
652 uint8_t old_eecs = eeprom->eecs;
653 uint8_t old_eesk = eeprom->eesk;
654
655 eeprom->eecs = eecs;
656 eeprom->eesk = eesk;
657 eeprom->eedi = eedi;
658
659 DEBUG_PRINT(("eeprom: +++ wires CS=%d SK=%d DI=%d DO=%d\n",
660 eeprom->eecs, eeprom->eesk, eeprom->eedi, eeprom->eedo));
661
662 if (!old_eecs && eecs)
663 {
664 /* Synchronize start */
665 eeprom->tick = 0;
666 eeprom->input = 0;
667 eeprom->output = 0;
668 eeprom->mode = Chip9346_enter_command_mode;
669
670 DEBUG_PRINT(("=== eeprom: begin access, enter command mode\n"));
671 }
672
673 if (!eecs)
674 {
675 DEBUG_PRINT(("=== eeprom: end access\n"));
676 return;
677 }
678
679 if (!old_eesk && eesk)
680 {
681 /* SK front rules */
682 prom9346_shift_clock(eeprom);
683 }
684 }
685
686 static void rtl8139_update_irq(RTL8139State *s)
687 {
688 int isr;
689 isr = (s->IntrStatus & s->IntrMask) & 0xffff;
690
691 DEBUG_PRINT(("RTL8139: Set IRQ to %d (%04x %04x)\n",
692 isr ? 1 : 0, s->IntrStatus, s->IntrMask));
693
694 qemu_set_irq(s->dev.irq[0], (isr != 0));
695 }
696
697 #define POLYNOMIAL 0x04c11db6
698
699 /* From FreeBSD */
700 /* XXX: optimize */
701 static int compute_mcast_idx(const uint8_t *ep)
702 {
703 uint32_t crc;
704 int carry, i, j;
705 uint8_t b;
706
707 crc = 0xffffffff;
708 for (i = 0; i < 6; i++) {
709 b = *ep++;
710 for (j = 0; j < 8; j++) {
711 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
712 crc <<= 1;
713 b >>= 1;
714 if (carry)
715 crc = ((crc ^ POLYNOMIAL) | carry);
716 }
717 }
718 return (crc >> 26);
719 }
720
721 static int rtl8139_RxWrap(RTL8139State *s)
722 {
723 /* wrapping enabled; assume 1.5k more buffer space if size < 65536 */
724 return (s->RxConfig & (1 << 7));
725 }
726
727 static int rtl8139_receiver_enabled(RTL8139State *s)
728 {
729 return s->bChipCmdState & CmdRxEnb;
730 }
731
732 static int rtl8139_transmitter_enabled(RTL8139State *s)
733 {
734 return s->bChipCmdState & CmdTxEnb;
735 }
736
737 static int rtl8139_cp_receiver_enabled(RTL8139State *s)
738 {
739 return s->CpCmd & CPlusRxEnb;
740 }
741
742 static int rtl8139_cp_transmitter_enabled(RTL8139State *s)
743 {
744 return s->CpCmd & CPlusTxEnb;
745 }
746
747 static void rtl8139_write_buffer(RTL8139State *s, const void *buf, int size)
748 {
749 if (s->RxBufAddr + size > s->RxBufferSize)
750 {
751 int wrapped = MOD2(s->RxBufAddr + size, s->RxBufferSize);
752
753 /* write packet data */
754 if (wrapped && !(s->RxBufferSize < 65536 && rtl8139_RxWrap(s)))
755 {
756 DEBUG_PRINT((">>> RTL8139: rx packet wrapped in buffer at %d\n", size-wrapped));
757
758 if (size > wrapped)
759 {
760 cpu_physical_memory_write( s->RxBuf + s->RxBufAddr,
761 buf, size-wrapped );
762 }
763
764 /* reset buffer pointer */
765 s->RxBufAddr = 0;
766
767 cpu_physical_memory_write( s->RxBuf + s->RxBufAddr,
768 buf + (size-wrapped), wrapped );
769
770 s->RxBufAddr = wrapped;
771
772 return;
773 }
774 }
775
776 /* non-wrapping path or overwrapping enabled */
777 cpu_physical_memory_write( s->RxBuf + s->RxBufAddr, buf, size );
778
779 s->RxBufAddr += size;
780 }
781
782 #define MIN_BUF_SIZE 60
783 static inline target_phys_addr_t rtl8139_addr64(uint32_t low, uint32_t high)
784 {
785 #if TARGET_PHYS_ADDR_BITS > 32
786 return low | ((target_phys_addr_t)high << 32);
787 #else
788 return low;
789 #endif
790 }
791
792 static int rtl8139_can_receive(VLANClientState *nc)
793 {
794 RTL8139State *s = DO_UPCAST(NICState, nc, nc)->opaque;
795 int avail;
796
797 /* Receive (drop) packets if card is disabled. */
798 if (!s->clock_enabled)
799 return 1;
800 if (!rtl8139_receiver_enabled(s))
801 return 1;
802
803 if (rtl8139_cp_receiver_enabled(s)) {
804 /* ??? Flow control not implemented in c+ mode.
805 This is a hack to work around slirp deficiencies anyway. */
806 return 1;
807 } else {
808 avail = MOD2(s->RxBufferSize + s->RxBufPtr - s->RxBufAddr,
809 s->RxBufferSize);
810 return (avail == 0 || avail >= 1514);
811 }
812 }
813
814 static ssize_t rtl8139_do_receive(VLANClientState *nc, const uint8_t *buf, size_t size_, int do_interrupt)
815 {
816 RTL8139State *s = DO_UPCAST(NICState, nc, nc)->opaque;
817 int size = size_;
818
819 uint32_t packet_header = 0;
820
821 uint8_t buf1[60];
822 static const uint8_t broadcast_macaddr[6] =
823 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
824
825 DEBUG_PRINT((">>> RTL8139: received len=%d\n", size));
826
827 /* test if board clock is stopped */
828 if (!s->clock_enabled)
829 {
830 DEBUG_PRINT(("RTL8139: stopped ==========================\n"));
831 return -1;
832 }
833
834 /* first check if receiver is enabled */
835
836 if (!rtl8139_receiver_enabled(s))
837 {
838 DEBUG_PRINT(("RTL8139: receiver disabled ================\n"));
839 return -1;
840 }
841
842 /* XXX: check this */
843 if (s->RxConfig & AcceptAllPhys) {
844 /* promiscuous: receive all */
845 DEBUG_PRINT((">>> RTL8139: packet received in promiscuous mode\n"));
846
847 } else {
848 if (!memcmp(buf, broadcast_macaddr, 6)) {
849 /* broadcast address */
850 if (!(s->RxConfig & AcceptBroadcast))
851 {
852 DEBUG_PRINT((">>> RTL8139: broadcast packet rejected\n"));
853
854 /* update tally counter */
855 ++s->tally_counters.RxERR;
856
857 return size;
858 }
859
860 packet_header |= RxBroadcast;
861
862 DEBUG_PRINT((">>> RTL8139: broadcast packet received\n"));
863
864 /* update tally counter */
865 ++s->tally_counters.RxOkBrd;
866
867 } else if (buf[0] & 0x01) {
868 /* multicast */
869 if (!(s->RxConfig & AcceptMulticast))
870 {
871 DEBUG_PRINT((">>> RTL8139: multicast packet rejected\n"));
872
873 /* update tally counter */
874 ++s->tally_counters.RxERR;
875
876 return size;
877 }
878
879 int mcast_idx = compute_mcast_idx(buf);
880
881 if (!(s->mult[mcast_idx >> 3] & (1 << (mcast_idx & 7))))
882 {
883 DEBUG_PRINT((">>> RTL8139: multicast address mismatch\n"));
884
885 /* update tally counter */
886 ++s->tally_counters.RxERR;
887
888 return size;
889 }
890
891 packet_header |= RxMulticast;
892
893 DEBUG_PRINT((">>> RTL8139: multicast packet received\n"));
894
895 /* update tally counter */
896 ++s->tally_counters.RxOkMul;
897
898 } else if (s->phys[0] == buf[0] &&
899 s->phys[1] == buf[1] &&
900 s->phys[2] == buf[2] &&
901 s->phys[3] == buf[3] &&
902 s->phys[4] == buf[4] &&
903 s->phys[5] == buf[5]) {
904 /* match */
905 if (!(s->RxConfig & AcceptMyPhys))
906 {
907 DEBUG_PRINT((">>> RTL8139: rejecting physical address matching packet\n"));
908
909 /* update tally counter */
910 ++s->tally_counters.RxERR;
911
912 return size;
913 }
914
915 packet_header |= RxPhysical;
916
917 DEBUG_PRINT((">>> RTL8139: physical address matching packet received\n"));
918
919 /* update tally counter */
920 ++s->tally_counters.RxOkPhy;
921
922 } else {
923
924 DEBUG_PRINT((">>> RTL8139: unknown packet\n"));
925
926 /* update tally counter */
927 ++s->tally_counters.RxERR;
928
929 return size;
930 }
931 }
932
933 /* if too small buffer, then expand it */
934 if (size < MIN_BUF_SIZE) {
935 memcpy(buf1, buf, size);
936 memset(buf1 + size, 0, MIN_BUF_SIZE - size);
937 buf = buf1;
938 size = MIN_BUF_SIZE;
939 }
940
941 if (rtl8139_cp_receiver_enabled(s))
942 {
943 DEBUG_PRINT(("RTL8139: in C+ Rx mode ================\n"));
944
945 /* begin C+ receiver mode */
946
947 /* w0 ownership flag */
948 #define CP_RX_OWN (1<<31)
949 /* w0 end of ring flag */
950 #define CP_RX_EOR (1<<30)
951 /* w0 bits 0...12 : buffer size */
952 #define CP_RX_BUFFER_SIZE_MASK ((1<<13) - 1)
953 /* w1 tag available flag */
954 #define CP_RX_TAVA (1<<16)
955 /* w1 bits 0...15 : VLAN tag */
956 #define CP_RX_VLAN_TAG_MASK ((1<<16) - 1)
957 /* w2 low 32bit of Rx buffer ptr */
958 /* w3 high 32bit of Rx buffer ptr */
959
960 int descriptor = s->currCPlusRxDesc;
961 target_phys_addr_t cplus_rx_ring_desc;
962
963 cplus_rx_ring_desc = rtl8139_addr64(s->RxRingAddrLO, s->RxRingAddrHI);
964 cplus_rx_ring_desc += 16 * descriptor;
965
966 DEBUG_PRINT(("RTL8139: +++ C+ mode reading RX descriptor %d from host memory at %08x %08x = %016" PRIx64 "\n",
967 descriptor, s->RxRingAddrHI, s->RxRingAddrLO, (uint64_t)cplus_rx_ring_desc));
968
969 uint32_t val, rxdw0,rxdw1,rxbufLO,rxbufHI;
970
971 cpu_physical_memory_read(cplus_rx_ring_desc, (uint8_t *)&val, 4);
972 rxdw0 = le32_to_cpu(val);
973 cpu_physical_memory_read(cplus_rx_ring_desc+4, (uint8_t *)&val, 4);
974 rxdw1 = le32_to_cpu(val);
975 cpu_physical_memory_read(cplus_rx_ring_desc+8, (uint8_t *)&val, 4);
976 rxbufLO = le32_to_cpu(val);
977 cpu_physical_memory_read(cplus_rx_ring_desc+12, (uint8_t *)&val, 4);
978 rxbufHI = le32_to_cpu(val);
979
980 DEBUG_PRINT(("RTL8139: +++ C+ mode RX descriptor %d %08x %08x %08x %08x\n",
981 descriptor,
982 rxdw0, rxdw1, rxbufLO, rxbufHI));
983
984 if (!(rxdw0 & CP_RX_OWN))
985 {
986 DEBUG_PRINT(("RTL8139: C+ Rx mode : descriptor %d is owned by host\n", descriptor));
987
988 s->IntrStatus |= RxOverflow;
989 ++s->RxMissed;
990
991 /* update tally counter */
992 ++s->tally_counters.RxERR;
993 ++s->tally_counters.MissPkt;
994
995 rtl8139_update_irq(s);
996 return size_;
997 }
998
999 uint32_t rx_space = rxdw0 & CP_RX_BUFFER_SIZE_MASK;
1000
1001 /* TODO: scatter the packet over available receive ring descriptors space */
1002
1003 if (size+4 > rx_space)
1004 {
1005 DEBUG_PRINT(("RTL8139: C+ Rx mode : descriptor %d size %d received %d + 4\n",
1006 descriptor, rx_space, size));
1007
1008 s->IntrStatus |= RxOverflow;
1009 ++s->RxMissed;
1010
1011 /* update tally counter */
1012 ++s->tally_counters.RxERR;
1013 ++s->tally_counters.MissPkt;
1014
1015 rtl8139_update_irq(s);
1016 return size_;
1017 }
1018
1019 target_phys_addr_t rx_addr = rtl8139_addr64(rxbufLO, rxbufHI);
1020
1021 /* receive/copy to target memory */
1022 cpu_physical_memory_write( rx_addr, buf, size );
1023
1024 if (s->CpCmd & CPlusRxChkSum)
1025 {
1026 /* do some packet checksumming */
1027 }
1028
1029 /* write checksum */
1030 #if defined (RTL8139_CALCULATE_RXCRC)
1031 val = cpu_to_le32(crc32(0, buf, size));
1032 #else
1033 val = 0;
1034 #endif
1035 cpu_physical_memory_write( rx_addr+size, (uint8_t *)&val, 4);
1036
1037 /* first segment of received packet flag */
1038 #define CP_RX_STATUS_FS (1<<29)
1039 /* last segment of received packet flag */
1040 #define CP_RX_STATUS_LS (1<<28)
1041 /* multicast packet flag */
1042 #define CP_RX_STATUS_MAR (1<<26)
1043 /* physical-matching packet flag */
1044 #define CP_RX_STATUS_PAM (1<<25)
1045 /* broadcast packet flag */
1046 #define CP_RX_STATUS_BAR (1<<24)
1047 /* runt packet flag */
1048 #define CP_RX_STATUS_RUNT (1<<19)
1049 /* crc error flag */
1050 #define CP_RX_STATUS_CRC (1<<18)
1051 /* IP checksum error flag */
1052 #define CP_RX_STATUS_IPF (1<<15)
1053 /* UDP checksum error flag */
1054 #define CP_RX_STATUS_UDPF (1<<14)
1055 /* TCP checksum error flag */
1056 #define CP_RX_STATUS_TCPF (1<<13)
1057
1058 /* transfer ownership to target */
1059 rxdw0 &= ~CP_RX_OWN;
1060
1061 /* set first segment bit */
1062 rxdw0 |= CP_RX_STATUS_FS;
1063
1064 /* set last segment bit */
1065 rxdw0 |= CP_RX_STATUS_LS;
1066
1067 /* set received packet type flags */
1068 if (packet_header & RxBroadcast)
1069 rxdw0 |= CP_RX_STATUS_BAR;
1070 if (packet_header & RxMulticast)
1071 rxdw0 |= CP_RX_STATUS_MAR;
1072 if (packet_header & RxPhysical)
1073 rxdw0 |= CP_RX_STATUS_PAM;
1074
1075 /* set received size */
1076 rxdw0 &= ~CP_RX_BUFFER_SIZE_MASK;
1077 rxdw0 |= (size+4);
1078
1079 /* reset VLAN tag flag */
1080 rxdw1 &= ~CP_RX_TAVA;
1081
1082 /* update ring data */
1083 val = cpu_to_le32(rxdw0);
1084 cpu_physical_memory_write(cplus_rx_ring_desc, (uint8_t *)&val, 4);
1085 val = cpu_to_le32(rxdw1);
1086 cpu_physical_memory_write(cplus_rx_ring_desc+4, (uint8_t *)&val, 4);
1087
1088 /* update tally counter */
1089 ++s->tally_counters.RxOk;
1090
1091 /* seek to next Rx descriptor */
1092 if (rxdw0 & CP_RX_EOR)
1093 {
1094 s->currCPlusRxDesc = 0;
1095 }
1096 else
1097 {
1098 ++s->currCPlusRxDesc;
1099 }
1100
1101 DEBUG_PRINT(("RTL8139: done C+ Rx mode ----------------\n"));
1102
1103 }
1104 else
1105 {
1106 DEBUG_PRINT(("RTL8139: in ring Rx mode ================\n"));
1107
1108 /* begin ring receiver mode */
1109 int avail = MOD2(s->RxBufferSize + s->RxBufPtr - s->RxBufAddr, s->RxBufferSize);
1110
1111 /* if receiver buffer is empty then avail == 0 */
1112
1113 if (avail != 0 && size + 8 >= avail)
1114 {
1115 DEBUG_PRINT(("rx overflow: rx buffer length %d head 0x%04x read 0x%04x === available 0x%04x need 0x%04x\n",
1116 s->RxBufferSize, s->RxBufAddr, s->RxBufPtr, avail, size + 8));
1117
1118 s->IntrStatus |= RxOverflow;
1119 ++s->RxMissed;
1120 rtl8139_update_irq(s);
1121 return size_;
1122 }
1123
1124 packet_header |= RxStatusOK;
1125
1126 packet_header |= (((size+4) << 16) & 0xffff0000);
1127
1128 /* write header */
1129 uint32_t val = cpu_to_le32(packet_header);
1130
1131 rtl8139_write_buffer(s, (uint8_t *)&val, 4);
1132
1133 rtl8139_write_buffer(s, buf, size);
1134
1135 /* write checksum */
1136 #if defined (RTL8139_CALCULATE_RXCRC)
1137 val = cpu_to_le32(crc32(0, buf, size));
1138 #else
1139 val = 0;
1140 #endif
1141
1142 rtl8139_write_buffer(s, (uint8_t *)&val, 4);
1143
1144 /* correct buffer write pointer */
1145 s->RxBufAddr = MOD2((s->RxBufAddr + 3) & ~0x3, s->RxBufferSize);
1146
1147 /* now we can signal we have received something */
1148
1149 DEBUG_PRINT((" received: rx buffer length %d head 0x%04x read 0x%04x\n",
1150 s->RxBufferSize, s->RxBufAddr, s->RxBufPtr));
1151 }
1152
1153 s->IntrStatus |= RxOK;
1154
1155 if (do_interrupt)
1156 {
1157 rtl8139_update_irq(s);
1158 }
1159
1160 return size_;
1161 }
1162
1163 static ssize_t rtl8139_receive(VLANClientState *nc, const uint8_t *buf, size_t size)
1164 {
1165 return rtl8139_do_receive(nc, buf, size, 1);
1166 }
1167
1168 static void rtl8139_reset_rxring(RTL8139State *s, uint32_t bufferSize)
1169 {
1170 s->RxBufferSize = bufferSize;
1171 s->RxBufPtr = 0;
1172 s->RxBufAddr = 0;
1173 }
1174
1175 static void rtl8139_reset(DeviceState *d)
1176 {
1177 RTL8139State *s = container_of(d, RTL8139State, dev.qdev);
1178 int i;
1179
1180 /* restore MAC address */
1181 memcpy(s->phys, s->conf.macaddr.a, 6);
1182
1183 /* reset interrupt mask */
1184 s->IntrStatus = 0;
1185 s->IntrMask = 0;
1186
1187 rtl8139_update_irq(s);
1188
1189 /* prepare eeprom */
1190 s->eeprom.contents[0] = 0x8129;
1191 #if 1
1192 // PCI vendor and device ID should be mirrored here
1193 s->eeprom.contents[1] = PCI_VENDOR_ID_REALTEK;
1194 s->eeprom.contents[2] = PCI_DEVICE_ID_REALTEK_8139;
1195 #endif
1196
1197 s->eeprom.contents[7] = s->conf.macaddr.a[0] | s->conf.macaddr.a[1] << 8;
1198 s->eeprom.contents[8] = s->conf.macaddr.a[2] | s->conf.macaddr.a[3] << 8;
1199 s->eeprom.contents[9] = s->conf.macaddr.a[4] | s->conf.macaddr.a[5] << 8;
1200
1201 /* mark all status registers as owned by host */
1202 for (i = 0; i < 4; ++i)
1203 {
1204 s->TxStatus[i] = TxHostOwns;
1205 }
1206
1207 s->currTxDesc = 0;
1208 s->currCPlusRxDesc = 0;
1209 s->currCPlusTxDesc = 0;
1210
1211 s->RxRingAddrLO = 0;
1212 s->RxRingAddrHI = 0;
1213
1214 s->RxBuf = 0;
1215
1216 rtl8139_reset_rxring(s, 8192);
1217
1218 /* ACK the reset */
1219 s->TxConfig = 0;
1220
1221 #if 0
1222 // s->TxConfig |= HW_REVID(1, 0, 0, 0, 0, 0, 0); // RTL-8139 HasHltClk
1223 s->clock_enabled = 0;
1224 #else
1225 s->TxConfig |= HW_REVID(1, 1, 1, 0, 1, 1, 0); // RTL-8139C+ HasLWake
1226 s->clock_enabled = 1;
1227 #endif
1228
1229 s->bChipCmdState = CmdReset; /* RxBufEmpty bit is calculated on read from ChipCmd */;
1230
1231 /* set initial state data */
1232 s->Config0 = 0x0; /* No boot ROM */
1233 s->Config1 = 0xC; /* IO mapped and MEM mapped registers available */
1234 s->Config3 = 0x1; /* fast back-to-back compatible */
1235 s->Config5 = 0x0;
1236
1237 s->CSCR = CSCR_F_LINK_100 | CSCR_HEART_BIT | CSCR_LD;
1238
1239 s->CpCmd = 0x0; /* reset C+ mode */
1240 s->cplus_enabled = 0;
1241
1242
1243 // s->BasicModeCtrl = 0x3100; // 100Mbps, full duplex, autonegotiation
1244 // s->BasicModeCtrl = 0x2100; // 100Mbps, full duplex
1245 s->BasicModeCtrl = 0x1000; // autonegotiation
1246
1247 s->BasicModeStatus = 0x7809;
1248 //s->BasicModeStatus |= 0x0040; /* UTP medium */
1249 s->BasicModeStatus |= 0x0020; /* autonegotiation completed */
1250 s->BasicModeStatus |= 0x0004; /* link is up */
1251
1252 s->NWayAdvert = 0x05e1; /* all modes, full duplex */
1253 s->NWayLPAR = 0x05e1; /* all modes, full duplex */
1254 s->NWayExpansion = 0x0001; /* autonegotiation supported */
1255
1256 /* also reset timer and disable timer interrupt */
1257 s->TCTR = 0;
1258 s->TimerInt = 0;
1259 s->TCTR_base = 0;
1260
1261 /* reset tally counters */
1262 RTL8139TallyCounters_clear(&s->tally_counters);
1263 }
1264
1265 static void RTL8139TallyCounters_clear(RTL8139TallyCounters* counters)
1266 {
1267 counters->TxOk = 0;
1268 counters->RxOk = 0;
1269 counters->TxERR = 0;
1270 counters->RxERR = 0;
1271 counters->MissPkt = 0;
1272 counters->FAE = 0;
1273 counters->Tx1Col = 0;
1274 counters->TxMCol = 0;
1275 counters->RxOkPhy = 0;
1276 counters->RxOkBrd = 0;
1277 counters->RxOkMul = 0;
1278 counters->TxAbt = 0;
1279 counters->TxUndrn = 0;
1280 }
1281
1282 static void RTL8139TallyCounters_physical_memory_write(target_phys_addr_t tc_addr, RTL8139TallyCounters* tally_counters)
1283 {
1284 uint16_t val16;
1285 uint32_t val32;
1286 uint64_t val64;
1287
1288 val64 = cpu_to_le64(tally_counters->TxOk);
1289 cpu_physical_memory_write(tc_addr + 0, (uint8_t *)&val64, 8);
1290
1291 val64 = cpu_to_le64(tally_counters->RxOk);
1292 cpu_physical_memory_write(tc_addr + 8, (uint8_t *)&val64, 8);
1293
1294 val64 = cpu_to_le64(tally_counters->TxERR);
1295 cpu_physical_memory_write(tc_addr + 16, (uint8_t *)&val64, 8);
1296
1297 val32 = cpu_to_le32(tally_counters->RxERR);
1298 cpu_physical_memory_write(tc_addr + 24, (uint8_t *)&val32, 4);
1299
1300 val16 = cpu_to_le16(tally_counters->MissPkt);
1301 cpu_physical_memory_write(tc_addr + 28, (uint8_t *)&val16, 2);
1302
1303 val16 = cpu_to_le16(tally_counters->FAE);
1304 cpu_physical_memory_write(tc_addr + 30, (uint8_t *)&val16, 2);
1305
1306 val32 = cpu_to_le32(tally_counters->Tx1Col);
1307 cpu_physical_memory_write(tc_addr + 32, (uint8_t *)&val32, 4);
1308
1309 val32 = cpu_to_le32(tally_counters->TxMCol);
1310 cpu_physical_memory_write(tc_addr + 36, (uint8_t *)&val32, 4);
1311
1312 val64 = cpu_to_le64(tally_counters->RxOkPhy);
1313 cpu_physical_memory_write(tc_addr + 40, (uint8_t *)&val64, 8);
1314
1315 val64 = cpu_to_le64(tally_counters->RxOkBrd);
1316 cpu_physical_memory_write(tc_addr + 48, (uint8_t *)&val64, 8);
1317
1318 val32 = cpu_to_le32(tally_counters->RxOkMul);
1319 cpu_physical_memory_write(tc_addr + 56, (uint8_t *)&val32, 4);
1320
1321 val16 = cpu_to_le16(tally_counters->TxAbt);
1322 cpu_physical_memory_write(tc_addr + 60, (uint8_t *)&val16, 2);
1323
1324 val16 = cpu_to_le16(tally_counters->TxUndrn);
1325 cpu_physical_memory_write(tc_addr + 62, (uint8_t *)&val16, 2);
1326 }
1327
1328 /* Loads values of tally counters from VM state file */
1329
1330 static const VMStateDescription vmstate_tally_counters = {
1331 .name = "tally_counters",
1332 .version_id = 1,
1333 .minimum_version_id = 1,
1334 .minimum_version_id_old = 1,
1335 .fields = (VMStateField []) {
1336 VMSTATE_UINT64(TxOk, RTL8139TallyCounters),
1337 VMSTATE_UINT64(RxOk, RTL8139TallyCounters),
1338 VMSTATE_UINT64(TxERR, RTL8139TallyCounters),
1339 VMSTATE_UINT32(RxERR, RTL8139TallyCounters),
1340 VMSTATE_UINT16(MissPkt, RTL8139TallyCounters),
1341 VMSTATE_UINT16(FAE, RTL8139TallyCounters),
1342 VMSTATE_UINT32(Tx1Col, RTL8139TallyCounters),
1343 VMSTATE_UINT32(TxMCol, RTL8139TallyCounters),
1344 VMSTATE_UINT64(RxOkPhy, RTL8139TallyCounters),
1345 VMSTATE_UINT64(RxOkBrd, RTL8139TallyCounters),
1346 VMSTATE_UINT16(TxAbt, RTL8139TallyCounters),
1347 VMSTATE_UINT16(TxUndrn, RTL8139TallyCounters),
1348 VMSTATE_END_OF_LIST()
1349 }
1350 };
1351
1352 static void rtl8139_ChipCmd_write(RTL8139State *s, uint32_t val)
1353 {
1354 val &= 0xff;
1355
1356 DEBUG_PRINT(("RTL8139: ChipCmd write val=0x%08x\n", val));
1357
1358 if (val & CmdReset)
1359 {
1360 DEBUG_PRINT(("RTL8139: ChipCmd reset\n"));
1361 rtl8139_reset(&s->dev.qdev);
1362 }
1363 if (val & CmdRxEnb)
1364 {
1365 DEBUG_PRINT(("RTL8139: ChipCmd enable receiver\n"));
1366
1367 s->currCPlusRxDesc = 0;
1368 }
1369 if (val & CmdTxEnb)
1370 {
1371 DEBUG_PRINT(("RTL8139: ChipCmd enable transmitter\n"));
1372
1373 s->currCPlusTxDesc = 0;
1374 }
1375
1376 /* mask unwriteable bits */
1377 val = SET_MASKED(val, 0xe3, s->bChipCmdState);
1378
1379 /* Deassert reset pin before next read */
1380 val &= ~CmdReset;
1381
1382 s->bChipCmdState = val;
1383 }
1384
1385 static int rtl8139_RxBufferEmpty(RTL8139State *s)
1386 {
1387 int unread = MOD2(s->RxBufferSize + s->RxBufAddr - s->RxBufPtr, s->RxBufferSize);
1388
1389 if (unread != 0)
1390 {
1391 DEBUG_PRINT(("RTL8139: receiver buffer data available 0x%04x\n", unread));
1392 return 0;
1393 }
1394
1395 DEBUG_PRINT(("RTL8139: receiver buffer is empty\n"));
1396
1397 return 1;
1398 }
1399
1400 static uint32_t rtl8139_ChipCmd_read(RTL8139State *s)
1401 {
1402 uint32_t ret = s->bChipCmdState;
1403
1404 if (rtl8139_RxBufferEmpty(s))
1405 ret |= RxBufEmpty;
1406
1407 DEBUG_PRINT(("RTL8139: ChipCmd read val=0x%04x\n", ret));
1408
1409 return ret;
1410 }
1411
1412 static void rtl8139_CpCmd_write(RTL8139State *s, uint32_t val)
1413 {
1414 val &= 0xffff;
1415
1416 DEBUG_PRINT(("RTL8139C+ command register write(w) val=0x%04x\n", val));
1417
1418 s->cplus_enabled = 1;
1419
1420 /* mask unwriteable bits */
1421 val = SET_MASKED(val, 0xff84, s->CpCmd);
1422
1423 s->CpCmd = val;
1424 }
1425
1426 static uint32_t rtl8139_CpCmd_read(RTL8139State *s)
1427 {
1428 uint32_t ret = s->CpCmd;
1429
1430 DEBUG_PRINT(("RTL8139C+ command register read(w) val=0x%04x\n", ret));
1431
1432 return ret;
1433 }
1434
1435 static void rtl8139_IntrMitigate_write(RTL8139State *s, uint32_t val)
1436 {
1437 DEBUG_PRINT(("RTL8139C+ IntrMitigate register write(w) val=0x%04x\n", val));
1438 }
1439
1440 static uint32_t rtl8139_IntrMitigate_read(RTL8139State *s)
1441 {
1442 uint32_t ret = 0;
1443
1444 DEBUG_PRINT(("RTL8139C+ IntrMitigate register read(w) val=0x%04x\n", ret));
1445
1446 return ret;
1447 }
1448
1449 static int rtl8139_config_writeable(RTL8139State *s)
1450 {
1451 if (s->Cfg9346 & Cfg9346_Unlock)
1452 {
1453 return 1;
1454 }
1455
1456 DEBUG_PRINT(("RTL8139: Configuration registers are write-protected\n"));
1457
1458 return 0;
1459 }
1460
1461 static void rtl8139_BasicModeCtrl_write(RTL8139State *s, uint32_t val)
1462 {
1463 val &= 0xffff;
1464
1465 DEBUG_PRINT(("RTL8139: BasicModeCtrl register write(w) val=0x%04x\n", val));
1466
1467 /* mask unwriteable bits */
1468 uint32_t mask = 0x4cff;
1469
1470 if (1 || !rtl8139_config_writeable(s))
1471 {
1472 /* Speed setting and autonegotiation enable bits are read-only */
1473 mask |= 0x3000;
1474 /* Duplex mode setting is read-only */
1475 mask |= 0x0100;
1476 }
1477
1478 val = SET_MASKED(val, mask, s->BasicModeCtrl);
1479
1480 s->BasicModeCtrl = val;
1481 }
1482
1483 static uint32_t rtl8139_BasicModeCtrl_read(RTL8139State *s)
1484 {
1485 uint32_t ret = s->BasicModeCtrl;
1486
1487 DEBUG_PRINT(("RTL8139: BasicModeCtrl register read(w) val=0x%04x\n", ret));
1488
1489 return ret;
1490 }
1491
1492 static void rtl8139_BasicModeStatus_write(RTL8139State *s, uint32_t val)
1493 {
1494 val &= 0xffff;
1495
1496 DEBUG_PRINT(("RTL8139: BasicModeStatus register write(w) val=0x%04x\n", val));
1497
1498 /* mask unwriteable bits */
1499 val = SET_MASKED(val, 0xff3f, s->BasicModeStatus);
1500
1501 s->BasicModeStatus = val;
1502 }
1503
1504 static uint32_t rtl8139_BasicModeStatus_read(RTL8139State *s)
1505 {
1506 uint32_t ret = s->BasicModeStatus;
1507
1508 DEBUG_PRINT(("RTL8139: BasicModeStatus register read(w) val=0x%04x\n", ret));
1509
1510 return ret;
1511 }
1512
1513 static void rtl8139_Cfg9346_write(RTL8139State *s, uint32_t val)
1514 {
1515 val &= 0xff;
1516
1517 DEBUG_PRINT(("RTL8139: Cfg9346 write val=0x%02x\n", val));
1518
1519 /* mask unwriteable bits */
1520 val = SET_MASKED(val, 0x31, s->Cfg9346);
1521
1522 uint32_t opmode = val & 0xc0;
1523 uint32_t eeprom_val = val & 0xf;
1524
1525 if (opmode == 0x80) {
1526 /* eeprom access */
1527 int eecs = (eeprom_val & 0x08)?1:0;
1528 int eesk = (eeprom_val & 0x04)?1:0;
1529 int eedi = (eeprom_val & 0x02)?1:0;
1530 prom9346_set_wire(s, eecs, eesk, eedi);
1531 } else if (opmode == 0x40) {
1532 /* Reset. */
1533 val = 0;
1534 rtl8139_reset(&s->dev.qdev);
1535 }
1536
1537 s->Cfg9346 = val;
1538 }
1539
1540 static uint32_t rtl8139_Cfg9346_read(RTL8139State *s)
1541 {
1542 uint32_t ret = s->Cfg9346;
1543
1544 uint32_t opmode = ret & 0xc0;
1545
1546 if (opmode == 0x80)
1547 {
1548 /* eeprom access */
1549 int eedo = prom9346_get_wire(s);
1550 if (eedo)
1551 {
1552 ret |= 0x01;
1553 }
1554 else
1555 {
1556 ret &= ~0x01;
1557 }
1558 }
1559
1560 DEBUG_PRINT(("RTL8139: Cfg9346 read val=0x%02x\n", ret));
1561
1562 return ret;
1563 }
1564
1565 static void rtl8139_Config0_write(RTL8139State *s, uint32_t val)
1566 {
1567 val &= 0xff;
1568
1569 DEBUG_PRINT(("RTL8139: Config0 write val=0x%02x\n", val));
1570
1571 if (!rtl8139_config_writeable(s))
1572 return;
1573
1574 /* mask unwriteable bits */
1575 val = SET_MASKED(val, 0xf8, s->Config0);
1576
1577 s->Config0 = val;
1578 }
1579
1580 static uint32_t rtl8139_Config0_read(RTL8139State *s)
1581 {
1582 uint32_t ret = s->Config0;
1583
1584 DEBUG_PRINT(("RTL8139: Config0 read val=0x%02x\n", ret));
1585
1586 return ret;
1587 }
1588
1589 static void rtl8139_Config1_write(RTL8139State *s, uint32_t val)
1590 {
1591 val &= 0xff;
1592
1593 DEBUG_PRINT(("RTL8139: Config1 write val=0x%02x\n", val));
1594
1595 if (!rtl8139_config_writeable(s))
1596 return;
1597
1598 /* mask unwriteable bits */
1599 val = SET_MASKED(val, 0xC, s->Config1);
1600
1601 s->Config1 = val;
1602 }
1603
1604 static uint32_t rtl8139_Config1_read(RTL8139State *s)
1605 {
1606 uint32_t ret = s->Config1;
1607
1608 DEBUG_PRINT(("RTL8139: Config1 read val=0x%02x\n", ret));
1609
1610 return ret;
1611 }
1612
1613 static void rtl8139_Config3_write(RTL8139State *s, uint32_t val)
1614 {
1615 val &= 0xff;
1616
1617 DEBUG_PRINT(("RTL8139: Config3 write val=0x%02x\n", val));
1618
1619 if (!rtl8139_config_writeable(s))
1620 return;
1621
1622 /* mask unwriteable bits */
1623 val = SET_MASKED(val, 0x8F, s->Config3);
1624
1625 s->Config3 = val;
1626 }
1627
1628 static uint32_t rtl8139_Config3_read(RTL8139State *s)
1629 {
1630 uint32_t ret = s->Config3;
1631
1632 DEBUG_PRINT(("RTL8139: Config3 read val=0x%02x\n", ret));
1633
1634 return ret;
1635 }
1636
1637 static void rtl8139_Config4_write(RTL8139State *s, uint32_t val)
1638 {
1639 val &= 0xff;
1640
1641 DEBUG_PRINT(("RTL8139: Config4 write val=0x%02x\n", val));
1642
1643 if (!rtl8139_config_writeable(s))
1644 return;
1645
1646 /* mask unwriteable bits */
1647 val = SET_MASKED(val, 0x0a, s->Config4);
1648
1649 s->Config4 = val;
1650 }
1651
1652 static uint32_t rtl8139_Config4_read(RTL8139State *s)
1653 {
1654 uint32_t ret = s->Config4;
1655
1656 DEBUG_PRINT(("RTL8139: Config4 read val=0x%02x\n", ret));
1657
1658 return ret;
1659 }
1660
1661 static void rtl8139_Config5_write(RTL8139State *s, uint32_t val)
1662 {
1663 val &= 0xff;
1664
1665 DEBUG_PRINT(("RTL8139: Config5 write val=0x%02x\n", val));
1666
1667 /* mask unwriteable bits */
1668 val = SET_MASKED(val, 0x80, s->Config5);
1669
1670 s->Config5 = val;
1671 }
1672
1673 static uint32_t rtl8139_Config5_read(RTL8139State *s)
1674 {
1675 uint32_t ret = s->Config5;
1676
1677 DEBUG_PRINT(("RTL8139: Config5 read val=0x%02x\n", ret));
1678
1679 return ret;
1680 }
1681
1682 static void rtl8139_TxConfig_write(RTL8139State *s, uint32_t val)
1683 {
1684 if (!rtl8139_transmitter_enabled(s))
1685 {
1686 DEBUG_PRINT(("RTL8139: transmitter disabled; no TxConfig write val=0x%08x\n", val));
1687 return;
1688 }
1689
1690 DEBUG_PRINT(("RTL8139: TxConfig write val=0x%08x\n", val));
1691
1692 val = SET_MASKED(val, TxVersionMask | 0x8070f80f, s->TxConfig);
1693
1694 s->TxConfig = val;
1695 }
1696
1697 static void rtl8139_TxConfig_writeb(RTL8139State *s, uint32_t val)
1698 {
1699 DEBUG_PRINT(("RTL8139C TxConfig via write(b) val=0x%02x\n", val));
1700
1701 uint32_t tc = s->TxConfig;
1702 tc &= 0xFFFFFF00;
1703 tc |= (val & 0x000000FF);
1704 rtl8139_TxConfig_write(s, tc);
1705 }
1706
1707 static uint32_t rtl8139_TxConfig_read(RTL8139State *s)
1708 {
1709 uint32_t ret = s->TxConfig;
1710
1711 DEBUG_PRINT(("RTL8139: TxConfig read val=0x%04x\n", ret));
1712
1713 return ret;
1714 }
1715
1716 static void rtl8139_RxConfig_write(RTL8139State *s, uint32_t val)
1717 {
1718 DEBUG_PRINT(("RTL8139: RxConfig write val=0x%08x\n", val));
1719
1720 /* mask unwriteable bits */
1721 val = SET_MASKED(val, 0xf0fc0040, s->RxConfig);
1722
1723 s->RxConfig = val;
1724
1725 /* reset buffer size and read/write pointers */
1726 rtl8139_reset_rxring(s, 8192 << ((s->RxConfig >> 11) & 0x3));
1727
1728 DEBUG_PRINT(("RTL8139: RxConfig write reset buffer size to %d\n", s->RxBufferSize));
1729 }
1730
1731 static uint32_t rtl8139_RxConfig_read(RTL8139State *s)
1732 {
1733 uint32_t ret = s->RxConfig;
1734
1735 DEBUG_PRINT(("RTL8139: RxConfig read val=0x%08x\n", ret));
1736
1737 return ret;
1738 }
1739
1740 static void rtl8139_transfer_frame(RTL8139State *s, const uint8_t *buf, int size, int do_interrupt)
1741 {
1742 if (!size)
1743 {
1744 DEBUG_PRINT(("RTL8139: +++ empty ethernet frame\n"));
1745 return;
1746 }
1747
1748 if (TxLoopBack == (s->TxConfig & TxLoopBack))
1749 {
1750 DEBUG_PRINT(("RTL8139: +++ transmit loopback mode\n"));
1751 rtl8139_do_receive(&s->nic->nc, buf, size, do_interrupt);
1752 }
1753 else
1754 {
1755 qemu_send_packet(&s->nic->nc, buf, size);
1756 }
1757 }
1758
1759 static int rtl8139_transmit_one(RTL8139State *s, int descriptor)
1760 {
1761 if (!rtl8139_transmitter_enabled(s))
1762 {
1763 DEBUG_PRINT(("RTL8139: +++ cannot transmit from descriptor %d: transmitter disabled\n",
1764 descriptor));
1765 return 0;
1766 }
1767
1768 if (s->TxStatus[descriptor] & TxHostOwns)
1769 {
1770 DEBUG_PRINT(("RTL8139: +++ cannot transmit from descriptor %d: owned by host (%08x)\n",
1771 descriptor, s->TxStatus[descriptor]));
1772 return 0;
1773 }
1774
1775 DEBUG_PRINT(("RTL8139: +++ transmitting from descriptor %d\n", descriptor));
1776
1777 int txsize = s->TxStatus[descriptor] & 0x1fff;
1778 uint8_t txbuffer[0x2000];
1779
1780 DEBUG_PRINT(("RTL8139: +++ transmit reading %d bytes from host memory at 0x%08x\n",
1781 txsize, s->TxAddr[descriptor]));
1782
1783 cpu_physical_memory_read(s->TxAddr[descriptor], txbuffer, txsize);
1784
1785 /* Mark descriptor as transferred */
1786 s->TxStatus[descriptor] |= TxHostOwns;
1787 s->TxStatus[descriptor] |= TxStatOK;
1788
1789 rtl8139_transfer_frame(s, txbuffer, txsize, 0);
1790
1791 DEBUG_PRINT(("RTL8139: +++ transmitted %d bytes from descriptor %d\n", txsize, descriptor));
1792
1793 /* update interrupt */
1794 s->IntrStatus |= TxOK;
1795 rtl8139_update_irq(s);
1796
1797 return 1;
1798 }
1799
1800 /* structures and macros for task offloading */
1801 typedef struct ip_header
1802 {
1803 uint8_t ip_ver_len; /* version and header length */
1804 uint8_t ip_tos; /* type of service */
1805 uint16_t ip_len; /* total length */
1806 uint16_t ip_id; /* identification */
1807 uint16_t ip_off; /* fragment offset field */
1808 uint8_t ip_ttl; /* time to live */
1809 uint8_t ip_p; /* protocol */
1810 uint16_t ip_sum; /* checksum */
1811 uint32_t ip_src,ip_dst; /* source and dest address */
1812 } ip_header;
1813
1814 #define IP_HEADER_VERSION_4 4
1815 #define IP_HEADER_VERSION(ip) ((ip->ip_ver_len >> 4)&0xf)
1816 #define IP_HEADER_LENGTH(ip) (((ip->ip_ver_len)&0xf) << 2)
1817
1818 typedef struct tcp_header
1819 {
1820 uint16_t th_sport; /* source port */
1821 uint16_t th_dport; /* destination port */
1822 uint32_t th_seq; /* sequence number */
1823 uint32_t th_ack; /* acknowledgement number */
1824 uint16_t th_offset_flags; /* data offset, reserved 6 bits, TCP protocol flags */
1825 uint16_t th_win; /* window */
1826 uint16_t th_sum; /* checksum */
1827 uint16_t th_urp; /* urgent pointer */
1828 } tcp_header;
1829
1830 typedef struct udp_header
1831 {
1832 uint16_t uh_sport; /* source port */
1833 uint16_t uh_dport; /* destination port */
1834 uint16_t uh_ulen; /* udp length */
1835 uint16_t uh_sum; /* udp checksum */
1836 } udp_header;
1837
1838 typedef struct ip_pseudo_header
1839 {
1840 uint32_t ip_src;
1841 uint32_t ip_dst;
1842 uint8_t zeros;
1843 uint8_t ip_proto;
1844 uint16_t ip_payload;
1845 } ip_pseudo_header;
1846
1847 #define IP_PROTO_TCP 6
1848 #define IP_PROTO_UDP 17
1849
1850 #define TCP_HEADER_DATA_OFFSET(tcp) (((be16_to_cpu(tcp->th_offset_flags) >> 12)&0xf) << 2)
1851 #define TCP_FLAGS_ONLY(flags) ((flags)&0x3f)
1852 #define TCP_HEADER_FLAGS(tcp) TCP_FLAGS_ONLY(be16_to_cpu(tcp->th_offset_flags))
1853
1854 #define TCP_HEADER_CLEAR_FLAGS(tcp, off) ((tcp)->th_offset_flags &= cpu_to_be16(~TCP_FLAGS_ONLY(off)))
1855
1856 #define TCP_FLAG_FIN 0x01
1857 #define TCP_FLAG_PUSH 0x08
1858
1859 /* produces ones' complement sum of data */
1860 static uint16_t ones_complement_sum(uint8_t *data, size_t len)
1861 {
1862 uint32_t result = 0;
1863
1864 for (; len > 1; data+=2, len-=2)
1865 {
1866 result += *(uint16_t*)data;
1867 }
1868
1869 /* add the remainder byte */
1870 if (len)
1871 {
1872 uint8_t odd[2] = {*data, 0};
1873 result += *(uint16_t*)odd;
1874 }
1875
1876 while (result>>16)
1877 result = (result & 0xffff) + (result >> 16);
1878
1879 return result;
1880 }
1881
1882 static uint16_t ip_checksum(void *data, size_t len)
1883 {
1884 return ~ones_complement_sum((uint8_t*)data, len);
1885 }
1886
1887 static int rtl8139_cplus_transmit_one(RTL8139State *s)
1888 {
1889 if (!rtl8139_transmitter_enabled(s))
1890 {
1891 DEBUG_PRINT(("RTL8139: +++ C+ mode: transmitter disabled\n"));
1892 return 0;
1893 }
1894
1895 if (!rtl8139_cp_transmitter_enabled(s))
1896 {
1897 DEBUG_PRINT(("RTL8139: +++ C+ mode: C+ transmitter disabled\n"));
1898 return 0 ;
1899 }
1900
1901 int descriptor = s->currCPlusTxDesc;
1902
1903 target_phys_addr_t cplus_tx_ring_desc =
1904 rtl8139_addr64(s->TxAddr[0], s->TxAddr[1]);
1905
1906 /* Normal priority ring */
1907 cplus_tx_ring_desc += 16 * descriptor;
1908
1909 DEBUG_PRINT(("RTL8139: +++ C+ mode reading TX descriptor %d from host memory at %08x0x%08x = 0x%8lx\n",
1910 descriptor, s->TxAddr[1], s->TxAddr[0], cplus_tx_ring_desc));
1911
1912 uint32_t val, txdw0,txdw1,txbufLO,txbufHI;
1913
1914 cpu_physical_memory_read(cplus_tx_ring_desc, (uint8_t *)&val, 4);
1915 txdw0 = le32_to_cpu(val);
1916 /* TODO: implement VLAN tagging support, VLAN tag data is read to txdw1 */
1917 cpu_physical_memory_read(cplus_tx_ring_desc+4, (uint8_t *)&val, 4);
1918 txdw1 = le32_to_cpu(val);
1919 cpu_physical_memory_read(cplus_tx_ring_desc+8, (uint8_t *)&val, 4);
1920 txbufLO = le32_to_cpu(val);
1921 cpu_physical_memory_read(cplus_tx_ring_desc+12, (uint8_t *)&val, 4);
1922 txbufHI = le32_to_cpu(val);
1923
1924 DEBUG_PRINT(("RTL8139: +++ C+ mode TX descriptor %d %08x %08x %08x %08x\n",
1925 descriptor,
1926 txdw0, txdw1, txbufLO, txbufHI));
1927
1928 /* TODO: the following discard cast should clean clang analyzer output */
1929 (void)txdw1;
1930
1931 /* w0 ownership flag */
1932 #define CP_TX_OWN (1<<31)
1933 /* w0 end of ring flag */
1934 #define CP_TX_EOR (1<<30)
1935 /* first segment of received packet flag */
1936 #define CP_TX_FS (1<<29)
1937 /* last segment of received packet flag */
1938 #define CP_TX_LS (1<<28)
1939 /* large send packet flag */
1940 #define CP_TX_LGSEN (1<<27)
1941 /* large send MSS mask, bits 16...25 */
1942 #define CP_TC_LGSEN_MSS_MASK ((1 << 12) - 1)
1943
1944 /* IP checksum offload flag */
1945 #define CP_TX_IPCS (1<<18)
1946 /* UDP checksum offload flag */
1947 #define CP_TX_UDPCS (1<<17)
1948 /* TCP checksum offload flag */
1949 #define CP_TX_TCPCS (1<<16)
1950
1951 /* w0 bits 0...15 : buffer size */
1952 #define CP_TX_BUFFER_SIZE (1<<16)
1953 #define CP_TX_BUFFER_SIZE_MASK (CP_TX_BUFFER_SIZE - 1)
1954 /* w1 tag available flag */
1955 #define CP_RX_TAGC (1<<17)
1956 /* w1 bits 0...15 : VLAN tag */
1957 #define CP_TX_VLAN_TAG_MASK ((1<<16) - 1)
1958 /* w2 low 32bit of Rx buffer ptr */
1959 /* w3 high 32bit of Rx buffer ptr */
1960
1961 /* set after transmission */
1962 /* FIFO underrun flag */
1963 #define CP_TX_STATUS_UNF (1<<25)
1964 /* transmit error summary flag, valid if set any of three below */
1965 #define CP_TX_STATUS_TES (1<<23)
1966 /* out-of-window collision flag */
1967 #define CP_TX_STATUS_OWC (1<<22)
1968 /* link failure flag */
1969 #define CP_TX_STATUS_LNKF (1<<21)
1970 /* excessive collisions flag */
1971 #define CP_TX_STATUS_EXC (1<<20)
1972
1973 if (!(txdw0 & CP_TX_OWN))
1974 {
1975 DEBUG_PRINT(("RTL8139: C+ Tx mode : descriptor %d is owned by host\n", descriptor));
1976 return 0 ;
1977 }
1978
1979 DEBUG_PRINT(("RTL8139: +++ C+ Tx mode : transmitting from descriptor %d\n", descriptor));
1980
1981 if (txdw0 & CP_TX_FS)
1982 {
1983 DEBUG_PRINT(("RTL8139: +++ C+ Tx mode : descriptor %d is first segment descriptor\n", descriptor));
1984
1985 /* reset internal buffer offset */
1986 s->cplus_txbuffer_offset = 0;
1987 }
1988
1989 int txsize = txdw0 & CP_TX_BUFFER_SIZE_MASK;
1990 target_phys_addr_t tx_addr = rtl8139_addr64(txbufLO, txbufHI);
1991
1992 /* make sure we have enough space to assemble the packet */
1993 if (!s->cplus_txbuffer)
1994 {
1995 s->cplus_txbuffer_len = CP_TX_BUFFER_SIZE;
1996 s->cplus_txbuffer = qemu_malloc(s->cplus_txbuffer_len);
1997 s->cplus_txbuffer_offset = 0;
1998
1999 DEBUG_PRINT(("RTL8139: +++ C+ mode transmission buffer allocated space %d\n", s->cplus_txbuffer_len));
2000 }
2001
2002 while (s->cplus_txbuffer && s->cplus_txbuffer_offset + txsize >= s->cplus_txbuffer_len)
2003 {
2004 s->cplus_txbuffer_len += CP_TX_BUFFER_SIZE;
2005 s->cplus_txbuffer = qemu_realloc(s->cplus_txbuffer, s->cplus_txbuffer_len);
2006
2007 DEBUG_PRINT(("RTL8139: +++ C+ mode transmission buffer space changed to %d\n", s->cplus_txbuffer_len));
2008 }
2009
2010 if (!s->cplus_txbuffer)
2011 {
2012 /* out of memory */
2013
2014 DEBUG_PRINT(("RTL8139: +++ C+ mode transmiter failed to reallocate %d bytes\n", s->cplus_txbuffer_len));
2015
2016 /* update tally counter */
2017 ++s->tally_counters.TxERR;
2018 ++s->tally_counters.TxAbt;
2019
2020 return 0;
2021 }
2022
2023 /* append more data to the packet */
2024
2025 DEBUG_PRINT(("RTL8139: +++ C+ mode transmit reading %d bytes from host memory at %016" PRIx64 " to offset %d\n",
2026 txsize, (uint64_t)tx_addr, s->cplus_txbuffer_offset));
2027
2028 cpu_physical_memory_read(tx_addr, s->cplus_txbuffer + s->cplus_txbuffer_offset, txsize);
2029 s->cplus_txbuffer_offset += txsize;
2030
2031 /* seek to next Rx descriptor */
2032 if (txdw0 & CP_TX_EOR)
2033 {
2034 s->currCPlusTxDesc = 0;
2035 }
2036 else
2037 {
2038 ++s->currCPlusTxDesc;
2039 if (s->currCPlusTxDesc >= 64)
2040 s->currCPlusTxDesc = 0;
2041 }
2042
2043 /* transfer ownership to target */
2044 txdw0 &= ~CP_RX_OWN;
2045
2046 /* reset error indicator bits */
2047 txdw0 &= ~CP_TX_STATUS_UNF;
2048 txdw0 &= ~CP_TX_STATUS_TES;
2049 txdw0 &= ~CP_TX_STATUS_OWC;
2050 txdw0 &= ~CP_TX_STATUS_LNKF;
2051 txdw0 &= ~CP_TX_STATUS_EXC;
2052
2053 /* update ring data */
2054 val = cpu_to_le32(txdw0);
2055 cpu_physical_memory_write(cplus_tx_ring_desc, (uint8_t *)&val, 4);
2056 /* TODO: implement VLAN tagging support, VLAN tag data is read to txdw1 */
2057 // val = cpu_to_le32(txdw1);
2058 // cpu_physical_memory_write(cplus_tx_ring_desc+4, &val, 4);
2059
2060 /* Now decide if descriptor being processed is holding the last segment of packet */
2061 if (txdw0 & CP_TX_LS)
2062 {
2063 DEBUG_PRINT(("RTL8139: +++ C+ Tx mode : descriptor %d is last segment descriptor\n", descriptor));
2064
2065 /* can transfer fully assembled packet */
2066
2067 uint8_t *saved_buffer = s->cplus_txbuffer;
2068 int saved_size = s->cplus_txbuffer_offset;
2069 int saved_buffer_len = s->cplus_txbuffer_len;
2070
2071 /* reset the card space to protect from recursive call */
2072 s->cplus_txbuffer = NULL;
2073 s->cplus_txbuffer_offset = 0;
2074 s->cplus_txbuffer_len = 0;
2075
2076 if (txdw0 & (CP_TX_IPCS | CP_TX_UDPCS | CP_TX_TCPCS | CP_TX_LGSEN))
2077 {
2078 DEBUG_PRINT(("RTL8139: +++ C+ mode offloaded task checksum\n"));
2079
2080 #define ETH_P_IP 0x0800 /* Internet Protocol packet */
2081 #define ETH_HLEN 14
2082 #define ETH_MTU 1500
2083
2084 /* ip packet header */
2085 ip_header *ip = NULL;
2086 int hlen = 0;
2087 uint8_t ip_protocol = 0;
2088 uint16_t ip_data_len = 0;
2089
2090 uint8_t *eth_payload_data = NULL;
2091 size_t eth_payload_len = 0;
2092
2093 int proto = be16_to_cpu(*(uint16_t *)(saved_buffer + 12));
2094 if (proto == ETH_P_IP)
2095 {
2096 DEBUG_PRINT(("RTL8139: +++ C+ mode has IP packet\n"));
2097
2098 /* not aligned */
2099 eth_payload_data = saved_buffer + ETH_HLEN;
2100 eth_payload_len = saved_size - ETH_HLEN;
2101
2102 ip = (ip_header*)eth_payload_data;
2103
2104 if (IP_HEADER_VERSION(ip) != IP_HEADER_VERSION_4) {
2105 DEBUG_PRINT(("RTL8139: +++ C+ mode packet has bad IP version %d expected %d\n", IP_HEADER_VERSION(ip), IP_HEADER_VERSION_4));
2106 ip = NULL;
2107 } else {
2108 hlen = IP_HEADER_LENGTH(ip);
2109 ip_protocol = ip->ip_p;
2110 ip_data_len = be16_to_cpu(ip->ip_len) - hlen;
2111 }
2112 }
2113
2114 if (ip)
2115 {
2116 if (txdw0 & CP_TX_IPCS)
2117 {
2118 DEBUG_PRINT(("RTL8139: +++ C+ mode need IP checksum\n"));
2119
2120 if (hlen<sizeof(ip_header) || hlen>eth_payload_len) {/* min header length */
2121 /* bad packet header len */
2122 /* or packet too short */
2123 }
2124 else
2125 {
2126 ip->ip_sum = 0;
2127 ip->ip_sum = ip_checksum(ip, hlen);
2128 DEBUG_PRINT(("RTL8139: +++ C+ mode IP header len=%d checksum=%04x\n", hlen, ip->ip_sum));
2129 }
2130 }
2131
2132 if ((txdw0 & CP_TX_LGSEN) && ip_protocol == IP_PROTO_TCP)
2133 {
2134 #if defined (DEBUG_RTL8139)
2135 int large_send_mss = (txdw0 >> 16) & CP_TC_LGSEN_MSS_MASK;
2136 #endif
2137 DEBUG_PRINT(("RTL8139: +++ C+ mode offloaded task TSO MTU=%d IP data %d frame data %d specified MSS=%d\n",
2138 ETH_MTU, ip_data_len, saved_size - ETH_HLEN, large_send_mss));
2139
2140 int tcp_send_offset = 0;
2141 int send_count = 0;
2142
2143 /* maximum IP header length is 60 bytes */
2144 uint8_t saved_ip_header[60];
2145
2146 /* save IP header template; data area is used in tcp checksum calculation */
2147 memcpy(saved_ip_header, eth_payload_data, hlen);
2148
2149 /* a placeholder for checksum calculation routine in tcp case */
2150 uint8_t *data_to_checksum = eth_payload_data + hlen - 12;
2151 // size_t data_to_checksum_len = eth_payload_len - hlen + 12;
2152
2153 /* pointer to TCP header */
2154 tcp_header *p_tcp_hdr = (tcp_header*)(eth_payload_data + hlen);
2155
2156 int tcp_hlen = TCP_HEADER_DATA_OFFSET(p_tcp_hdr);
2157
2158 /* ETH_MTU = ip header len + tcp header len + payload */
2159 int tcp_data_len = ip_data_len - tcp_hlen;
2160 int tcp_chunk_size = ETH_MTU - hlen - tcp_hlen;
2161
2162 DEBUG_PRINT(("RTL8139: +++ C+ mode TSO IP data len %d TCP hlen %d TCP data len %d TCP chunk size %d\n",
2163 ip_data_len, tcp_hlen, tcp_data_len, tcp_chunk_size));
2164
2165 /* note the cycle below overwrites IP header data,
2166 but restores it from saved_ip_header before sending packet */
2167
2168 int is_last_frame = 0;
2169
2170 for (tcp_send_offset = 0; tcp_send_offset < tcp_data_len; tcp_send_offset += tcp_chunk_size)
2171 {
2172 uint16_t chunk_size = tcp_chunk_size;
2173
2174 /* check if this is the last frame */
2175 if (tcp_send_offset + tcp_chunk_size >= tcp_data_len)
2176 {
2177 is_last_frame = 1;
2178 chunk_size = tcp_data_len - tcp_send_offset;
2179 }
2180
2181 DEBUG_PRINT(("RTL8139: +++ C+ mode TSO TCP seqno %08x\n", be32_to_cpu(p_tcp_hdr->th_seq)));
2182
2183 /* add 4 TCP pseudoheader fields */
2184 /* copy IP source and destination fields */
2185 memcpy(data_to_checksum, saved_ip_header + 12, 8);
2186
2187 DEBUG_PRINT(("RTL8139: +++ C+ mode TSO calculating TCP checksum for packet with %d bytes data\n", tcp_hlen + chunk_size));
2188
2189 if (tcp_send_offset)
2190 {
2191 memcpy((uint8_t*)p_tcp_hdr + tcp_hlen, (uint8_t*)p_tcp_hdr + tcp_hlen + tcp_send_offset, chunk_size);
2192 }
2193
2194 /* keep PUSH and FIN flags only for the last frame */
2195 if (!is_last_frame)
2196 {
2197 TCP_HEADER_CLEAR_FLAGS(p_tcp_hdr, TCP_FLAG_PUSH|TCP_FLAG_FIN);
2198 }
2199
2200 /* recalculate TCP checksum */
2201 ip_pseudo_header *p_tcpip_hdr = (ip_pseudo_header *)data_to_checksum;
2202 p_tcpip_hdr->zeros = 0;
2203 p_tcpip_hdr->ip_proto = IP_PROTO_TCP;
2204 p_tcpip_hdr->ip_payload = cpu_to_be16(tcp_hlen + chunk_size);
2205
2206 p_tcp_hdr->th_sum = 0;
2207
2208 int tcp_checksum = ip_checksum(data_to_checksum, tcp_hlen + chunk_size + 12);
2209 DEBUG_PRINT(("RTL8139: +++ C+ mode TSO TCP checksum %04x\n", tcp_checksum));
2210
2211 p_tcp_hdr->th_sum = tcp_checksum;
2212
2213 /* restore IP header */
2214 memcpy(eth_payload_data, saved_ip_header, hlen);
2215
2216 /* set IP data length and recalculate IP checksum */
2217 ip->ip_len = cpu_to_be16(hlen + tcp_hlen + chunk_size);
2218
2219 /* increment IP id for subsequent frames */
2220 ip->ip_id = cpu_to_be16(tcp_send_offset/tcp_chunk_size + be16_to_cpu(ip->ip_id));
2221
2222 ip->ip_sum = 0;
2223 ip->ip_sum = ip_checksum(eth_payload_data, hlen);
2224 DEBUG_PRINT(("RTL8139: +++ C+ mode TSO IP header len=%d checksum=%04x\n", hlen, ip->ip_sum));
2225
2226 int tso_send_size = ETH_HLEN + hlen + tcp_hlen + chunk_size;
2227 DEBUG_PRINT(("RTL8139: +++ C+ mode TSO transferring packet size %d\n", tso_send_size));
2228 rtl8139_transfer_frame(s, saved_buffer, tso_send_size, 0);
2229
2230 /* add transferred count to TCP sequence number */
2231 p_tcp_hdr->th_seq = cpu_to_be32(chunk_size + be32_to_cpu(p_tcp_hdr->th_seq));
2232 ++send_count;
2233 }
2234
2235 /* Stop sending this frame */
2236 saved_size = 0;
2237 }
2238 else if (txdw0 & (CP_TX_TCPCS|CP_TX_UDPCS))
2239 {
2240 DEBUG_PRINT(("RTL8139: +++ C+ mode need TCP or UDP checksum\n"));
2241
2242 /* maximum IP header length is 60 bytes */
2243 uint8_t saved_ip_header[60];
2244 memcpy(saved_ip_header, eth_payload_data, hlen);
2245
2246 uint8_t *data_to_checksum = eth_payload_data + hlen - 12;
2247 // size_t data_to_checksum_len = eth_payload_len - hlen + 12;
2248
2249 /* add 4 TCP pseudoheader fields */
2250 /* copy IP source and destination fields */
2251 memcpy(data_to_checksum, saved_ip_header + 12, 8);
2252
2253 if ((txdw0 & CP_TX_TCPCS) && ip_protocol == IP_PROTO_TCP)
2254 {
2255 DEBUG_PRINT(("RTL8139: +++ C+ mode calculating TCP checksum for packet with %d bytes data\n", ip_data_len));
2256
2257 ip_pseudo_header *p_tcpip_hdr = (ip_pseudo_header *)data_to_checksum;
2258 p_tcpip_hdr->zeros = 0;
2259 p_tcpip_hdr->ip_proto = IP_PROTO_TCP;
2260 p_tcpip_hdr->ip_payload = cpu_to_be16(ip_data_len);
2261
2262 tcp_header* p_tcp_hdr = (tcp_header *) (data_to_checksum+12);
2263
2264 p_tcp_hdr->th_sum = 0;
2265
2266 int tcp_checksum = ip_checksum(data_to_checksum, ip_data_len + 12);
2267 DEBUG_PRINT(("RTL8139: +++ C+ mode TCP checksum %04x\n", tcp_checksum));
2268
2269 p_tcp_hdr->th_sum = tcp_checksum;
2270 }
2271 else if ((txdw0 & CP_TX_UDPCS) && ip_protocol == IP_PROTO_UDP)
2272 {
2273 DEBUG_PRINT(("RTL8139: +++ C+ mode calculating UDP checksum for packet with %d bytes data\n", ip_data_len));
2274
2275 ip_pseudo_header *p_udpip_hdr = (ip_pseudo_header *)data_to_checksum;
2276 p_udpip_hdr->zeros = 0;
2277 p_udpip_hdr->ip_proto = IP_PROTO_UDP;
2278 p_udpip_hdr->ip_payload = cpu_to_be16(ip_data_len);
2279
2280 udp_header *p_udp_hdr = (udp_header *) (data_to_checksum+12);
2281
2282 p_udp_hdr->uh_sum = 0;
2283
2284 int udp_checksum = ip_checksum(data_to_checksum, ip_data_len + 12);
2285 DEBUG_PRINT(("RTL8139: +++ C+ mode UDP checksum %04x\n", udp_checksum));
2286
2287 p_udp_hdr->uh_sum = udp_checksum;
2288 }
2289
2290 /* restore IP header */
2291 memcpy(eth_payload_data, saved_ip_header, hlen);
2292 }
2293 }
2294 }
2295
2296 /* update tally counter */
2297 ++s->tally_counters.TxOk;
2298
2299 DEBUG_PRINT(("RTL8139: +++ C+ mode transmitting %d bytes packet\n", saved_size));
2300
2301 rtl8139_transfer_frame(s, saved_buffer, saved_size, 1);
2302
2303 /* restore card space if there was no recursion and reset offset */
2304 if (!s->cplus_txbuffer)
2305 {
2306 s->cplus_txbuffer = saved_buffer;
2307 s->cplus_txbuffer_len = saved_buffer_len;
2308 s->cplus_txbuffer_offset = 0;
2309 }
2310 else
2311 {
2312 qemu_free(saved_buffer);
2313 }
2314 }
2315 else
2316 {
2317 DEBUG_PRINT(("RTL8139: +++ C+ mode transmission continue to next descriptor\n"));
2318 }
2319
2320 return 1;
2321 }
2322
2323 static void rtl8139_cplus_transmit(RTL8139State *s)
2324 {
2325 int txcount = 0;
2326
2327 while (rtl8139_cplus_transmit_one(s))
2328 {
2329 ++txcount;
2330 }
2331
2332 /* Mark transfer completed */
2333 if (!txcount)
2334 {
2335 DEBUG_PRINT(("RTL8139: C+ mode : transmitter queue stalled, current TxDesc = %d\n",
2336 s->currCPlusTxDesc));
2337 }
2338 else
2339 {
2340 /* update interrupt status */
2341 s->IntrStatus |= TxOK;
2342 rtl8139_update_irq(s);
2343 }
2344 }
2345
2346 static void rtl8139_transmit(RTL8139State *s)
2347 {
2348 int descriptor = s->currTxDesc, txcount = 0;
2349
2350 /*while*/
2351 if (rtl8139_transmit_one(s, descriptor))
2352 {
2353 ++s->currTxDesc;
2354 s->currTxDesc %= 4;
2355 ++txcount;
2356 }
2357
2358 /* Mark transfer completed */
2359 if (!txcount)
2360 {
2361 DEBUG_PRINT(("RTL8139: transmitter queue stalled, current TxDesc = %d\n", s->currTxDesc));
2362 }
2363 }
2364
2365 static void rtl8139_TxStatus_write(RTL8139State *s, uint32_t txRegOffset, uint32_t val)
2366 {
2367
2368 int descriptor = txRegOffset/4;
2369
2370 /* handle C+ transmit mode register configuration */
2371
2372 if (s->cplus_enabled)
2373 {
2374 DEBUG_PRINT(("RTL8139C+ DTCCR write offset=0x%x val=0x%08x descriptor=%d\n", txRegOffset, val, descriptor));
2375
2376 /* handle Dump Tally Counters command */
2377 s->TxStatus[descriptor] = val;
2378
2379 if (descriptor == 0 && (val & 0x8))
2380 {
2381 target_phys_addr_t tc_addr = rtl8139_addr64(s->TxStatus[0] & ~0x3f, s->TxStatus[1]);
2382
2383 /* dump tally counters to specified memory location */
2384 RTL8139TallyCounters_physical_memory_write( tc_addr, &s->tally_counters);
2385
2386 /* mark dump completed */
2387 s->TxStatus[0] &= ~0x8;
2388 }
2389
2390 return;
2391 }
2392
2393 DEBUG_PRINT(("RTL8139: TxStatus write offset=0x%x val=0x%08x descriptor=%d\n", txRegOffset, val, descriptor));
2394
2395 /* mask only reserved bits */
2396 val &= ~0xff00c000; /* these bits are reset on write */
2397 val = SET_MASKED(val, 0x00c00000, s->TxStatus[descriptor]);
2398
2399 s->TxStatus[descriptor] = val;
2400
2401 /* attempt to start transmission */
2402 rtl8139_transmit(s);
2403 }
2404
2405 static uint32_t rtl8139_TxStatus_read(RTL8139State *s, uint32_t txRegOffset)
2406 {
2407 uint32_t ret = s->TxStatus[txRegOffset/4];
2408
2409 DEBUG_PRINT(("RTL8139: TxStatus read offset=0x%x val=0x%08x\n", txRegOffset, ret));
2410
2411 return ret;
2412 }
2413
2414 static uint16_t rtl8139_TSAD_read(RTL8139State *s)
2415 {
2416 uint16_t ret = 0;
2417
2418 /* Simulate TSAD, it is read only anyway */
2419
2420 ret = ((s->TxStatus[3] & TxStatOK )?TSAD_TOK3:0)
2421 |((s->TxStatus[2] & TxStatOK )?TSAD_TOK2:0)
2422 |((s->TxStatus[1] & TxStatOK )?TSAD_TOK1:0)
2423 |((s->TxStatus[0] & TxStatOK )?TSAD_TOK0:0)
2424
2425 |((s->TxStatus[3] & TxUnderrun)?TSAD_TUN3:0)
2426 |((s->TxStatus[2] & TxUnderrun)?TSAD_TUN2:0)
2427 |((s->TxStatus[1] & TxUnderrun)?TSAD_TUN1:0)
2428 |((s->TxStatus[0] & TxUnderrun)?TSAD_TUN0:0)
2429
2430 |((s->TxStatus[3] & TxAborted )?TSAD_TABT3:0)
2431 |((s->TxStatus[2] & TxAborted )?TSAD_TABT2:0)
2432 |((s->TxStatus[1] & TxAborted )?TSAD_TABT1:0)
2433 |((s->TxStatus[0] & TxAborted )?TSAD_TABT0:0)
2434
2435 |((s->TxStatus[3] & TxHostOwns )?TSAD_OWN3:0)
2436 |((s->TxStatus[2] & TxHostOwns )?TSAD_OWN2:0)
2437 |((s->TxStatus[1] & TxHostOwns )?TSAD_OWN1:0)
2438 |((s->TxStatus[0] & TxHostOwns )?TSAD_OWN0:0) ;
2439
2440
2441 DEBUG_PRINT(("RTL8139: TSAD read val=0x%04x\n", ret));
2442
2443 return ret;
2444 }
2445
2446 static uint16_t rtl8139_CSCR_read(RTL8139State *s)
2447 {
2448 uint16_t ret = s->CSCR;
2449
2450 DEBUG_PRINT(("RTL8139: CSCR read val=0x%04x\n", ret));
2451
2452 return ret;
2453 }
2454
2455 static void rtl8139_TxAddr_write(RTL8139State *s, uint32_t txAddrOffset, uint32_t val)
2456 {
2457 DEBUG_PRINT(("RTL8139: TxAddr write offset=0x%x val=0x%08x\n", txAddrOffset, val));
2458
2459 s->TxAddr[txAddrOffset/4] = val;
2460 }
2461
2462 static uint32_t rtl8139_TxAddr_read(RTL8139State *s, uint32_t txAddrOffset)
2463 {
2464 uint32_t ret = s->TxAddr[txAddrOffset/4];
2465
2466 DEBUG_PRINT(("RTL8139: TxAddr read offset=0x%x val=0x%08x\n", txAddrOffset, ret));
2467
2468 return ret;
2469 }
2470
2471 static void rtl8139_RxBufPtr_write(RTL8139State *s, uint32_t val)
2472 {
2473 DEBUG_PRINT(("RTL8139: RxBufPtr write val=0x%04x\n", val));
2474
2475 /* this value is off by 16 */
2476 s->RxBufPtr = MOD2(val + 0x10, s->RxBufferSize);
2477
2478 DEBUG_PRINT((" CAPR write: rx buffer length %d head 0x%04x read 0x%04x\n",
2479 s->RxBufferSize, s->RxBufAddr, s->RxBufPtr));
2480 }
2481
2482 static uint32_t rtl8139_RxBufPtr_read(RTL8139State *s)
2483 {
2484 /* this value is off by 16 */
2485 uint32_t ret = s->RxBufPtr - 0x10;
2486
2487 DEBUG_PRINT(("RTL8139: RxBufPtr read val=0x%04x\n", ret));
2488
2489 return ret;
2490 }
2491
2492 static uint32_t rtl8139_RxBufAddr_read(RTL8139State *s)
2493 {
2494 /* this value is NOT off by 16 */
2495 uint32_t ret = s->RxBufAddr;
2496
2497 DEBUG_PRINT(("RTL8139: RxBufAddr read val=0x%04x\n", ret));
2498
2499 return ret;
2500 }
2501
2502 static void rtl8139_RxBuf_write(RTL8139State *s, uint32_t val)
2503 {
2504 DEBUG_PRINT(("RTL8139: RxBuf write val=0x%08x\n", val));
2505
2506 s->RxBuf = val;
2507
2508 /* may need to reset rxring here */
2509 }
2510
2511 static uint32_t rtl8139_RxBuf_read(RTL8139State *s)
2512 {
2513 uint32_t ret = s->RxBuf;
2514
2515 DEBUG_PRINT(("RTL8139: RxBuf read val=0x%08x\n", ret));
2516
2517 return ret;
2518 }
2519
2520 static void rtl8139_IntrMask_write(RTL8139State *s, uint32_t val)
2521 {
2522 DEBUG_PRINT(("RTL8139: IntrMask write(w) val=0x%04x\n", val));
2523
2524 /* mask unwriteable bits */
2525 val = SET_MASKED(val, 0x1e00, s->IntrMask);
2526
2527 s->IntrMask = val;
2528
2529 rtl8139_set_next_tctr_time(s, qemu_get_clock(vm_clock));
2530 rtl8139_update_irq(s);
2531
2532 }
2533
2534 static uint32_t rtl8139_IntrMask_read(RTL8139State *s)
2535 {
2536 uint32_t ret = s->IntrMask;
2537
2538 DEBUG_PRINT(("RTL8139: IntrMask read(w) val=0x%04x\n", ret));
2539
2540 return ret;
2541 }
2542
2543 static void rtl8139_IntrStatus_write(RTL8139State *s, uint32_t val)
2544 {
2545 DEBUG_PRINT(("RTL8139: IntrStatus write(w) val=0x%04x\n", val));
2546
2547 #if 0
2548
2549 /* writing to ISR has no effect */
2550
2551 return;
2552
2553 #else
2554 uint16_t newStatus = s->IntrStatus & ~val;
2555
2556 /* mask unwriteable bits */
2557 newStatus = SET_MASKED(newStatus, 0x1e00, s->IntrStatus);
2558
2559 /* writing 1 to interrupt status register bit clears it */
2560 s->IntrStatus = 0;
2561 rtl8139_update_irq(s);
2562
2563 s->IntrStatus = newStatus;
2564 /*
2565 * Computing if we miss an interrupt here is not that correct but
2566 * considered that we should have had already an interrupt
2567 * and probably emulated is slower is better to assume this resetting was
2568 * done before testing on previous rtl8139_update_irq lead to IRQ loosing
2569 */
2570 rtl8139_set_next_tctr_time(s, qemu_get_clock(vm_clock));
2571 rtl8139_update_irq(s);
2572
2573 #endif
2574 }
2575
2576 static uint32_t rtl8139_IntrStatus_read(RTL8139State *s)
2577 {
2578 rtl8139_set_next_tctr_time(s, qemu_get_clock(vm_clock));
2579
2580 uint32_t ret = s->IntrStatus;
2581
2582 DEBUG_PRINT(("RTL8139: IntrStatus read(w) val=0x%04x\n", ret));
2583
2584 #if 0
2585
2586 /* reading ISR clears all interrupts */
2587 s->IntrStatus = 0;
2588
2589 rtl8139_update_irq(s);
2590
2591 #endif
2592
2593 return ret;
2594 }
2595
2596 static void rtl8139_MultiIntr_write(RTL8139State *s, uint32_t val)
2597 {
2598 DEBUG_PRINT(("RTL8139: MultiIntr write(w) val=0x%04x\n", val));
2599
2600 /* mask unwriteable bits */
2601 val = SET_MASKED(val, 0xf000, s->MultiIntr);
2602
2603 s->MultiIntr = val;
2604 }
2605
2606 static uint32_t rtl8139_MultiIntr_read(RTL8139State *s)
2607 {
2608 uint32_t ret = s->MultiIntr;
2609
2610 DEBUG_PRINT(("RTL8139: MultiIntr read(w) val=0x%04x\n", ret));
2611
2612 return ret;
2613 }
2614
2615 static void rtl8139_io_writeb(void *opaque, uint8_t addr, uint32_t val)
2616 {
2617 RTL8139State *s = opaque;
2618
2619 addr &= 0xff;
2620
2621 switch (addr)
2622 {
2623 case MAC0 ... MAC0+5:
2624 s->phys[addr - MAC0] = val;
2625 break;
2626 case MAC0+6 ... MAC0+7:
2627 /* reserved */
2628 break;
2629 case MAR0 ... MAR0+7:
2630 s->mult[addr - MAR0] = val;
2631 break;
2632 case ChipCmd:
2633 rtl8139_ChipCmd_write(s, val);
2634 break;
2635 case Cfg9346:
2636 rtl8139_Cfg9346_write(s, val);
2637 break;
2638 case TxConfig: /* windows driver sometimes writes using byte-lenth call */
2639 rtl8139_TxConfig_writeb(s, val);
2640 break;
2641 case Config0:
2642 rtl8139_Config0_write(s, val);
2643 break;
2644 case Config1:
2645 rtl8139_Config1_write(s, val);
2646 break;
2647 case Config3:
2648 rtl8139_Config3_write(s, val);
2649 break;
2650 case Config4:
2651 rtl8139_Config4_write(s, val);
2652 break;
2653 case Config5:
2654 rtl8139_Config5_write(s, val);
2655 break;
2656 case MediaStatus:
2657 /* ignore */
2658 DEBUG_PRINT(("RTL8139: not implemented write(b) to MediaStatus val=0x%02x\n", val));
2659 break;
2660
2661 case HltClk:
2662 DEBUG_PRINT(("RTL8139: HltClk write val=0x%08x\n", val));
2663 if (val == 'R')
2664 {
2665 s->clock_enabled = 1;
2666 }
2667 else if (val == 'H')
2668 {
2669 s->clock_enabled = 0;
2670 }
2671 break;
2672
2673 case TxThresh:
2674 DEBUG_PRINT(("RTL8139C+ TxThresh write(b) val=0x%02x\n", val));
2675 s->TxThresh = val;
2676 break;
2677
2678 case TxPoll:
2679 DEBUG_PRINT(("RTL8139C+ TxPoll write(b) val=0x%02x\n", val));
2680 if (val & (1 << 7))
2681 {
2682 DEBUG_PRINT(("RTL8139C+ TxPoll high priority transmission (not implemented)\n"));
2683 //rtl8139_cplus_transmit(s);
2684 }
2685 if (val & (1 << 6))
2686 {
2687 DEBUG_PRINT(("RTL8139C+ TxPoll normal priority transmission\n"));
2688 rtl8139_cplus_transmit(s);
2689 }
2690
2691 break;
2692
2693 default:
2694 DEBUG_PRINT(("RTL8139: not implemented write(b) addr=0x%x val=0x%02x\n", addr, val));
2695 break;
2696 }
2697 }
2698
2699 static void rtl8139_io_writew(void *opaque, uint8_t addr, uint32_t val)
2700 {
2701 RTL8139State *s = opaque;
2702
2703 addr &= 0xfe;
2704
2705 switch (addr)
2706 {
2707 case IntrMask:
2708 rtl8139_IntrMask_write(s, val);
2709 break;
2710
2711 case IntrStatus:
2712 rtl8139_IntrStatus_write(s, val);
2713 break;
2714
2715 case MultiIntr:
2716 rtl8139_MultiIntr_write(s, val);
2717 break;
2718
2719 case RxBufPtr:
2720 rtl8139_RxBufPtr_write(s, val);
2721 break;
2722
2723 case BasicModeCtrl:
2724 rtl8139_BasicModeCtrl_write(s, val);
2725 break;
2726 case BasicModeStatus:
2727 rtl8139_BasicModeStatus_write(s, val);
2728 break;
2729 case NWayAdvert:
2730 DEBUG_PRINT(("RTL8139: NWayAdvert write(w) val=0x%04x\n", val));
2731 s->NWayAdvert = val;
2732 break;
2733 case NWayLPAR:
2734 DEBUG_PRINT(("RTL8139: forbidden NWayLPAR write(w) val=0x%04x\n", val));
2735 break;
2736 case NWayExpansion:
2737 DEBUG_PRINT(("RTL8139: NWayExpansion write(w) val=0x%04x\n", val));
2738 s->NWayExpansion = val;
2739 break;
2740
2741 case CpCmd:
2742 rtl8139_CpCmd_write(s, val);
2743 break;
2744
2745 case IntrMitigate:
2746 rtl8139_IntrMitigate_write(s, val);
2747 break;
2748
2749 default:
2750 DEBUG_PRINT(("RTL8139: ioport write(w) addr=0x%x val=0x%04x via write(b)\n", addr, val));
2751
2752 rtl8139_io_writeb(opaque, addr, val & 0xff);
2753 rtl8139_io_writeb(opaque, addr + 1, (val >> 8) & 0xff);
2754 break;
2755 }
2756 }
2757
2758 static void rtl8139_set_next_tctr_time(RTL8139State *s, int64_t current_time)
2759 {
2760 int64_t pci_time, next_time;
2761 uint32_t low_pci;
2762
2763 DEBUG_PRINT(("RTL8139: entered rtl8139_set_next_tctr_time\n"));
2764
2765 if (s->TimerExpire && current_time >= s->TimerExpire) {
2766 s->IntrStatus |= PCSTimeout;
2767 rtl8139_update_irq(s);
2768 }
2769
2770 /* Set QEMU timer only if needed that is
2771 * - TimerInt <> 0 (we have a timer)
2772 * - mask = 1 (we want an interrupt timer)
2773 * - irq = 0 (irq is not already active)
2774 * If any of above change we need to compute timer again
2775 * Also we must check if timer is passed without QEMU timer
2776 */
2777 s->TimerExpire = 0;
2778 if (!s->TimerInt) {
2779 return;
2780 }
2781
2782 pci_time = muldiv64(current_time - s->TCTR_base, PCI_FREQUENCY,
2783 get_ticks_per_sec());
2784 low_pci = pci_time & 0xffffffff;
2785 pci_time = pci_time - low_pci + s->TimerInt;
2786 if (low_pci >= s->TimerInt) {
2787 pci_time += 0x100000000LL;
2788 }
2789 next_time = s->TCTR_base + muldiv64(pci_time, get_ticks_per_sec(),
2790 PCI_FREQUENCY);
2791 s->TimerExpire = next_time;
2792
2793 if ((s->IntrMask & PCSTimeout) != 0 && (s->IntrStatus & PCSTimeout) == 0) {
2794 qemu_mod_timer(s->timer, next_time);
2795 }
2796 }
2797
2798 static void rtl8139_io_writel(void *opaque, uint8_t addr, uint32_t val)
2799 {
2800 RTL8139State *s = opaque;
2801
2802 addr &= 0xfc;
2803
2804 switch (addr)
2805 {
2806 case RxMissed:
2807 DEBUG_PRINT(("RTL8139: RxMissed clearing on write\n"));
2808 s->RxMissed = 0;
2809 break;
2810
2811 case TxConfig:
2812 rtl8139_TxConfig_write(s, val);
2813 break;
2814
2815 case RxConfig:
2816 rtl8139_RxConfig_write(s, val);
2817 break;
2818
2819 case TxStatus0 ... TxStatus0+4*4-1:
2820 rtl8139_TxStatus_write(s, addr-TxStatus0, val);
2821 break;
2822
2823 case TxAddr0 ... TxAddr0+4*4-1:
2824 rtl8139_TxAddr_write(s, addr-TxAddr0, val);
2825 break;
2826
2827 case RxBuf:
2828 rtl8139_RxBuf_write(s, val);
2829 break;
2830
2831 case RxRingAddrLO:
2832 DEBUG_PRINT(("RTL8139: C+ RxRing low bits write val=0x%08x\n", val));
2833 s->RxRingAddrLO = val;
2834 break;
2835
2836 case RxRingAddrHI:
2837 DEBUG_PRINT(("RTL8139: C+ RxRing high bits write val=0x%08x\n", val));
2838 s->RxRingAddrHI = val;
2839 break;
2840
2841 case Timer:
2842 DEBUG_PRINT(("RTL8139: TCTR Timer reset on write\n"));
2843 s->TCTR_base = qemu_get_clock(vm_clock);
2844 rtl8139_set_next_tctr_time(s, s->TCTR_base);
2845 break;
2846
2847 case FlashReg:
2848 DEBUG_PRINT(("RTL8139: FlashReg TimerInt write val=0x%08x\n", val));
2849 if (s->TimerInt != val) {
2850 s->TimerInt = val;
2851 rtl8139_set_next_tctr_time(s, qemu_get_clock(vm_clock));
2852 }
2853 break;
2854
2855 default:
2856 DEBUG_PRINT(("RTL8139: ioport write(l) addr=0x%x val=0x%08x via write(b)\n", addr, val));
2857 rtl8139_io_writeb(opaque, addr, val & 0xff);
2858 rtl8139_io_writeb(opaque, addr + 1, (val >> 8) & 0xff);
2859 rtl8139_io_writeb(opaque, addr + 2, (val >> 16) & 0xff);
2860 rtl8139_io_writeb(opaque, addr + 3, (val >> 24) & 0xff);
2861 break;
2862 }
2863 }
2864
2865 static uint32_t rtl8139_io_readb(void *opaque, uint8_t addr)
2866 {
2867 RTL8139State *s = opaque;
2868 int ret;
2869
2870 addr &= 0xff;
2871
2872 switch (addr)
2873 {
2874 case MAC0 ... MAC0+5:
2875 ret = s->phys[addr - MAC0];
2876 break;
2877 case MAC0+6 ... MAC0+7:
2878 ret = 0;
2879 break;
2880 case MAR0 ... MAR0+7:
2881 ret = s->mult[addr - MAR0];
2882 break;
2883 case ChipCmd:
2884 ret = rtl8139_ChipCmd_read(s);
2885 break;
2886 case Cfg9346:
2887 ret = rtl8139_Cfg9346_read(s);
2888 break;
2889 case Config0:
2890 ret = rtl8139_Config0_read(s);
2891 break;
2892 case Config1:
2893 ret = rtl8139_Config1_read(s);
2894 break;
2895 case Config3:
2896 ret = rtl8139_Config3_read(s);
2897 break;
2898 case Config4:
2899 ret = rtl8139_Config4_read(s);
2900 break;
2901 case Config5:
2902 ret = rtl8139_Config5_read(s);
2903 break;
2904
2905 case MediaStatus:
2906 ret = 0xd0;
2907 DEBUG_PRINT(("RTL8139: MediaStatus read 0x%x\n", ret));
2908 break;
2909
2910 case HltClk:
2911 ret = s->clock_enabled;
2912 DEBUG_PRINT(("RTL8139: HltClk read 0x%x\n", ret));
2913 break;
2914
2915 case PCIRevisionID:
2916 ret = RTL8139_PCI_REVID;
2917 DEBUG_PRINT(("RTL8139: PCI Revision ID read 0x%x\n", ret));
2918 break;
2919
2920 case TxThresh:
2921 ret = s->TxThresh;
2922 DEBUG_PRINT(("RTL8139C+ TxThresh read(b) val=0x%02x\n", ret));
2923 break;
2924
2925 case 0x43: /* Part of TxConfig register. Windows driver tries to read it */
2926 ret = s->TxConfig >> 24;
2927 DEBUG_PRINT(("RTL8139C TxConfig at 0x43 read(b) val=0x%02x\n", ret));
2928 break;
2929
2930 default:
2931 DEBUG_PRINT(("RTL8139: not implemented read(b) addr=0x%x\n", addr));
2932 ret = 0;
2933 break;
2934 }
2935
2936 return ret;
2937 }
2938
2939 static uint32_t rtl8139_io_readw(void *opaque, uint8_t addr)
2940 {
2941 RTL8139State *s = opaque;
2942 uint32_t ret;
2943
2944 addr &= 0xfe; /* mask lower bit */
2945
2946 switch (addr)
2947 {
2948 case IntrMask:
2949 ret = rtl8139_IntrMask_read(s);
2950 break;
2951
2952 case IntrStatus:
2953 ret = rtl8139_IntrStatus_read(s);
2954 break;
2955
2956 case MultiIntr:
2957 ret = rtl8139_MultiIntr_read(s);
2958 break;
2959
2960 case RxBufPtr:
2961 ret = rtl8139_RxBufPtr_read(s);
2962 break;
2963
2964 case RxBufAddr:
2965 ret = rtl8139_RxBufAddr_read(s);
2966 break;
2967
2968 case BasicModeCtrl:
2969 ret = rtl8139_BasicModeCtrl_read(s);
2970 break;
2971 case BasicModeStatus:
2972 ret = rtl8139_BasicModeStatus_read(s);
2973 break;
2974 case NWayAdvert:
2975 ret = s->NWayAdvert;
2976 DEBUG_PRINT(("RTL8139: NWayAdvert read(w) val=0x%04x\n", ret));
2977 break;
2978 case NWayLPAR:
2979 ret = s->NWayLPAR;
2980 DEBUG_PRINT(("RTL8139: NWayLPAR read(w) val=0x%04x\n", ret));
2981 break;
2982 case NWayExpansion:
2983 ret = s->NWayExpansion;
2984 DEBUG_PRINT(("RTL8139: NWayExpansion read(w) val=0x%04x\n", ret));
2985 break;
2986
2987 case CpCmd:
2988 ret = rtl8139_CpCmd_read(s);
2989 break;
2990
2991 case IntrMitigate:
2992 ret = rtl8139_IntrMitigate_read(s);
2993 break;
2994
2995 case TxSummary:
2996 ret = rtl8139_TSAD_read(s);
2997 break;
2998
2999 case CSCR:
3000 ret = rtl8139_CSCR_read(s);
3001 break;
3002
3003 default:
3004 DEBUG_PRINT(("RTL8139: ioport read(w) addr=0x%x via read(b)\n", addr));
3005
3006 ret = rtl8139_io_readb(opaque, addr);
3007 ret |= rtl8139_io_readb(opaque, addr + 1) << 8;
3008
3009 DEBUG_PRINT(("RTL8139: ioport read(w) addr=0x%x val=0x%04x\n", addr, ret));
3010 break;
3011 }
3012
3013 return ret;
3014 }
3015
3016 static uint32_t rtl8139_io_readl(void *opaque, uint8_t addr)
3017 {
3018 RTL8139State *s = opaque;
3019 uint32_t ret;
3020
3021 addr &= 0xfc; /* also mask low 2 bits */
3022
3023 switch (addr)
3024 {
3025 case RxMissed:
3026 ret = s->RxMissed;
3027
3028 DEBUG_PRINT(("RTL8139: RxMissed read val=0x%08x\n", ret));
3029 break;
3030
3031 case TxConfig:
3032 ret = rtl8139_TxConfig_read(s);
3033 break;
3034
3035 case RxConfig:
3036 ret = rtl8139_RxConfig_read(s);
3037 break;
3038
3039 case TxStatus0 ... TxStatus0+4*4-1:
3040 ret = rtl8139_TxStatus_read(s, addr-TxStatus0);
3041 break;
3042
3043 case TxAddr0 ... TxAddr0+4*4-1:
3044 ret = rtl8139_TxAddr_read(s, addr-TxAddr0);
3045 break;
3046
3047 case RxBuf:
3048 ret = rtl8139_RxBuf_read(s);
3049 break;
3050
3051 case RxRingAddrLO:
3052 ret = s->RxRingAddrLO;
3053 DEBUG_PRINT(("RTL8139: C+ RxRing low bits read val=0x%08x\n", ret));
3054 break;
3055
3056 case RxRingAddrHI:
3057 ret = s->RxRingAddrHI;
3058 DEBUG_PRINT(("RTL8139: C+ RxRing high bits read val=0x%08x\n", ret));
3059 break;
3060
3061 case Timer:
3062 ret = muldiv64(qemu_get_clock(vm_clock) - s->TCTR_base,
3063 PCI_FREQUENCY, get_ticks_per_sec());
3064 DEBUG_PRINT(("RTL8139: TCTR Timer read val=0x%08x\n", ret));
3065 break;
3066
3067 case FlashReg:
3068 ret = s->TimerInt;
3069 DEBUG_PRINT(("RTL8139: FlashReg TimerInt read val=0x%08x\n", ret));
3070 break;
3071
3072 default:
3073 DEBUG_PRINT(("RTL8139: ioport read(l) addr=0x%x via read(b)\n", addr));
3074
3075 ret = rtl8139_io_readb(opaque, addr);
3076 ret |= rtl8139_io_readb(opaque, addr + 1) << 8;
3077 ret |= rtl8139_io_readb(opaque, addr + 2) << 16;
3078 ret |= rtl8139_io_readb(opaque, addr + 3) << 24;
3079
3080 DEBUG_PRINT(("RTL8139: read(l) addr=0x%x val=%08x\n", addr, ret));
3081 break;
3082 }
3083
3084 return ret;
3085 }
3086
3087 /* */
3088
3089 static void rtl8139_ioport_writeb(void *opaque, uint32_t addr, uint32_t val)
3090 {
3091 rtl8139_io_writeb(opaque, addr & 0xFF, val);
3092 }
3093
3094 static void rtl8139_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
3095 {
3096 rtl8139_io_writew(opaque, addr & 0xFF, val);
3097 }
3098
3099 static void rtl8139_ioport_writel(void *opaque, uint32_t addr, uint32_t val)
3100 {
3101 rtl8139_io_writel(opaque, addr & 0xFF, val);
3102 }
3103
3104 static uint32_t rtl8139_ioport_readb(void *opaque, uint32_t addr)
3105 {
3106 return rtl8139_io_readb(opaque, addr & 0xFF);
3107 }
3108
3109 static uint32_t rtl8139_ioport_readw(void *opaque, uint32_t addr)
3110 {
3111 return rtl8139_io_readw(opaque, addr & 0xFF);
3112 }
3113
3114 static uint32_t rtl8139_ioport_readl(void *opaque, uint32_t addr)
3115 {
3116 return rtl8139_io_readl(opaque, addr & 0xFF);
3117 }
3118
3119 /* */
3120
3121 static void rtl8139_mmio_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
3122 {
3123 rtl8139_io_writeb(opaque, addr & 0xFF, val);
3124 }
3125
3126 static void rtl8139_mmio_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
3127 {
3128 #ifdef TARGET_WORDS_BIGENDIAN
3129 val = bswap16(val);
3130 #endif
3131 rtl8139_io_writew(opaque, addr & 0xFF, val);
3132 }
3133
3134 static void rtl8139_mmio_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
3135 {
3136 #ifdef TARGET_WORDS_BIGENDIAN
3137 val = bswap32(val);
3138 #endif
3139 rtl8139_io_writel(opaque, addr & 0xFF, val);
3140 }
3141
3142 static uint32_t rtl8139_mmio_readb(void *opaque, target_phys_addr_t addr)
3143 {
3144 return rtl8139_io_readb(opaque, addr & 0xFF);
3145 }
3146
3147 static uint32_t rtl8139_mmio_readw(void *opaque, target_phys_addr_t addr)
3148 {
3149 uint32_t val = rtl8139_io_readw(opaque, addr & 0xFF);
3150 #ifdef TARGET_WORDS_BIGENDIAN
3151 val = bswap16(val);
3152 #endif
3153 return val;
3154 }
3155
3156 static uint32_t rtl8139_mmio_readl(void *opaque, target_phys_addr_t addr)
3157 {
3158 uint32_t val = rtl8139_io_readl(opaque, addr & 0xFF);
3159 #ifdef TARGET_WORDS_BIGENDIAN
3160 val = bswap32(val);
3161 #endif
3162 return val;
3163 }
3164
3165 static int rtl8139_post_load(void *opaque, int version_id)
3166 {
3167 RTL8139State* s = opaque;
3168 rtl8139_set_next_tctr_time(s, qemu_get_clock(vm_clock));
3169 if (version_id < 4) {
3170 s->cplus_enabled = s->CpCmd != 0;
3171 }
3172
3173 return 0;
3174 }
3175
3176 static void rtl8139_pre_save(void *opaque)
3177 {
3178 RTL8139State* s = opaque;
3179 int64_t current_time = qemu_get_clock(vm_clock);
3180
3181 /* set IntrStatus correctly */
3182 rtl8139_set_next_tctr_time(s, current_time);
3183 s->TCTR = muldiv64(current_time - s->TCTR_base, PCI_FREQUENCY,
3184 get_ticks_per_sec());
3185 }
3186
3187 static const VMStateDescription vmstate_rtl8139 = {
3188 .name = "rtl8139",
3189 .version_id = 4,
3190 .minimum_version_id = 3,
3191 .minimum_version_id_old = 3,
3192 .post_load = rtl8139_post_load,
3193 .pre_save = rtl8139_pre_save,
3194 .fields = (VMStateField []) {
3195 VMSTATE_PCI_DEVICE(dev, RTL8139State),
3196 VMSTATE_PARTIAL_BUFFER(phys, RTL8139State, 6),
3197 VMSTATE_BUFFER(mult, RTL8139State),
3198 VMSTATE_UINT32_ARRAY(TxStatus, RTL8139State, 4),
3199 VMSTATE_UINT32_ARRAY(TxAddr, RTL8139State, 4),
3200
3201 VMSTATE_UINT32(RxBuf, RTL8139State),
3202 VMSTATE_UINT32(RxBufferSize, RTL8139State),
3203 VMSTATE_UINT32(RxBufPtr, RTL8139State),
3204 VMSTATE_UINT32(RxBufAddr, RTL8139State),
3205
3206 VMSTATE_UINT16(IntrStatus, RTL8139State),
3207 VMSTATE_UINT16(IntrMask, RTL8139State),
3208
3209 VMSTATE_UINT32(TxConfig, RTL8139State),
3210 VMSTATE_UINT32(RxConfig, RTL8139State),
3211 VMSTATE_UINT32(RxMissed, RTL8139State),
3212 VMSTATE_UINT16(CSCR, RTL8139State),
3213
3214 VMSTATE_UINT8(Cfg9346, RTL8139State),
3215 VMSTATE_UINT8(Config0, RTL8139State),
3216 VMSTATE_UINT8(Config1, RTL8139State),
3217 VMSTATE_UINT8(Config3, RTL8139State),
3218 VMSTATE_UINT8(Config4, RTL8139State),
3219 VMSTATE_UINT8(Config5, RTL8139State),
3220
3221 VMSTATE_UINT8(clock_enabled, RTL8139State),
3222 VMSTATE_UINT8(bChipCmdState, RTL8139State),
3223
3224 VMSTATE_UINT16(MultiIntr, RTL8139State),
3225
3226 VMSTATE_UINT16(BasicModeCtrl, RTL8139State),
3227 VMSTATE_UINT16(BasicModeStatus, RTL8139State),
3228 VMSTATE_UINT16(NWayAdvert, RTL8139State),
3229 VMSTATE_UINT16(NWayLPAR, RTL8139State),
3230 VMSTATE_UINT16(NWayExpansion, RTL8139State),
3231
3232 VMSTATE_UINT16(CpCmd, RTL8139State),
3233 VMSTATE_UINT8(TxThresh, RTL8139State),
3234
3235 VMSTATE_UNUSED(4),
3236 VMSTATE_MACADDR(conf.macaddr, RTL8139State),
3237 VMSTATE_INT32(rtl8139_mmio_io_addr, RTL8139State),
3238
3239 VMSTATE_UINT32(currTxDesc, RTL8139State),
3240 VMSTATE_UINT32(currCPlusRxDesc, RTL8139State),
3241 VMSTATE_UINT32(currCPlusTxDesc, RTL8139State),
3242 VMSTATE_UINT32(RxRingAddrLO, RTL8139State),
3243 VMSTATE_UINT32(RxRingAddrHI, RTL8139State),
3244
3245 VMSTATE_UINT16_ARRAY(eeprom.contents, RTL8139State, EEPROM_9346_SIZE),
3246 VMSTATE_INT32(eeprom.mode, RTL8139State),
3247 VMSTATE_UINT32(eeprom.tick, RTL8139State),
3248 VMSTATE_UINT8(eeprom.address, RTL8139State),
3249 VMSTATE_UINT16(eeprom.input, RTL8139State),
3250 VMSTATE_UINT16(eeprom.output, RTL8139State),
3251
3252 VMSTATE_UINT8(eeprom.eecs, RTL8139State),
3253 VMSTATE_UINT8(eeprom.eesk, RTL8139State),
3254 VMSTATE_UINT8(eeprom.eedi, RTL8139State),
3255 VMSTATE_UINT8(eeprom.eedo, RTL8139State),
3256
3257 VMSTATE_UINT32(TCTR, RTL8139State),
3258 VMSTATE_UINT32(TimerInt, RTL8139State),
3259 VMSTATE_INT64(TCTR_base, RTL8139State),
3260
3261 VMSTATE_STRUCT(tally_counters, RTL8139State, 0,
3262 vmstate_tally_counters, RTL8139TallyCounters),
3263
3264 VMSTATE_UINT32_V(cplus_enabled, RTL8139State, 4),
3265 VMSTATE_END_OF_LIST()
3266 }
3267 };
3268
3269 /***********************************************************/
3270 /* PCI RTL8139 definitions */
3271
3272 static void rtl8139_mmio_map(PCIDevice *pci_dev, int region_num,
3273 pcibus_t addr, pcibus_t size, int type)
3274 {
3275 RTL8139State *s = DO_UPCAST(RTL8139State, dev, pci_dev);
3276
3277 cpu_register_physical_memory(addr + 0, 0x100, s->rtl8139_mmio_io_addr);
3278 }
3279
3280 static void rtl8139_ioport_map(PCIDevice *pci_dev, int region_num,
3281 pcibus_t addr, pcibus_t size, int type)
3282 {
3283 RTL8139State *s = DO_UPCAST(RTL8139State, dev, pci_dev);
3284
3285 register_ioport_write(addr, 0x100, 1, rtl8139_ioport_writeb, s);
3286 register_ioport_read( addr, 0x100, 1, rtl8139_ioport_readb, s);
3287
3288 register_ioport_write(addr, 0x100, 2, rtl8139_ioport_writew, s);
3289 register_ioport_read( addr, 0x100, 2, rtl8139_ioport_readw, s);
3290
3291 register_ioport_write(addr, 0x100, 4, rtl8139_ioport_writel, s);
3292 register_ioport_read( addr, 0x100, 4, rtl8139_ioport_readl, s);
3293 }
3294
3295 static CPUReadMemoryFunc * const rtl8139_mmio_read[3] = {
3296 rtl8139_mmio_readb,
3297 rtl8139_mmio_readw,
3298 rtl8139_mmio_readl,
3299 };
3300
3301 static CPUWriteMemoryFunc * const rtl8139_mmio_write[3] = {
3302 rtl8139_mmio_writeb,
3303 rtl8139_mmio_writew,
3304 rtl8139_mmio_writel,
3305 };
3306
3307 static void rtl8139_timer(void *opaque)
3308 {
3309 RTL8139State *s = opaque;
3310
3311 if (!s->clock_enabled)
3312 {
3313 DEBUG_PRINT(("RTL8139: >>> timer: clock is not running\n"));
3314 return;
3315 }
3316
3317 s->IntrStatus |= PCSTimeout;
3318 rtl8139_update_irq(s);
3319 rtl8139_set_next_tctr_time(s, qemu_get_clock(vm_clock));
3320 }
3321
3322 static void rtl8139_cleanup(VLANClientState *nc)
3323 {
3324 RTL8139State *s = DO_UPCAST(NICState, nc, nc)->opaque;
3325
3326 s->nic = NULL;
3327 }
3328
3329 static int pci_rtl8139_uninit(PCIDevice *dev)
3330 {
3331 RTL8139State *s = DO_UPCAST(RTL8139State, dev, dev);
3332
3333 cpu_unregister_io_memory(s->rtl8139_mmio_io_addr);
3334 if (s->cplus_txbuffer) {
3335 qemu_free(s->cplus_txbuffer);
3336 s->cplus_txbuffer = NULL;
3337 }
3338 qemu_del_timer(s->timer);
3339 qemu_free_timer(s->timer);
3340 qemu_del_vlan_client(&s->nic->nc);
3341 return 0;
3342 }
3343
3344 static NetClientInfo net_rtl8139_info = {
3345 .type = NET_CLIENT_TYPE_NIC,
3346 .size = sizeof(NICState),
3347 .can_receive = rtl8139_can_receive,
3348 .receive = rtl8139_receive,
3349 .cleanup = rtl8139_cleanup,
3350 };
3351
3352 static int pci_rtl8139_init(PCIDevice *dev)
3353 {
3354 RTL8139State * s = DO_UPCAST(RTL8139State, dev, dev);
3355 uint8_t *pci_conf;
3356
3357 pci_conf = s->dev.config;
3358 pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_REALTEK);
3359 pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_REALTEK_8139);
3360 pci_conf[PCI_REVISION_ID] = RTL8139_PCI_REVID; /* >=0x20 is for 8139C+ */
3361 pci_config_set_class(pci_conf, PCI_CLASS_NETWORK_ETHERNET);
3362 pci_conf[PCI_INTERRUPT_PIN] = 1; /* interrupt pin 0 */
3363 /* TODO: start of capability list, but no capability
3364 * list bit in status register, and offset 0xdc seems unused. */
3365 pci_conf[PCI_CAPABILITY_LIST] = 0xdc;
3366
3367 /* I/O handler for memory-mapped I/O */
3368 s->rtl8139_mmio_io_addr =
3369 cpu_register_io_memory(rtl8139_mmio_read, rtl8139_mmio_write, s);
3370
3371 pci_register_bar(&s->dev, 0, 0x100,
3372 PCI_BASE_ADDRESS_SPACE_IO, rtl8139_ioport_map);
3373
3374 pci_register_bar(&s->dev, 1, 0x100,
3375 PCI_BASE_ADDRESS_SPACE_MEMORY, rtl8139_mmio_map);
3376
3377 qemu_macaddr_default_if_unset(&s->conf.macaddr);
3378
3379 s->nic = qemu_new_nic(&net_rtl8139_info, &s->conf,
3380 dev->qdev.info->name, dev->qdev.id, s);
3381 qemu_format_nic_info_str(&s->nic->nc, s->conf.macaddr.a);
3382
3383 s->cplus_txbuffer = NULL;
3384 s->cplus_txbuffer_len = 0;
3385 s->cplus_txbuffer_offset = 0;
3386
3387 s->TimerExpire = 0;
3388 s->timer = qemu_new_timer(vm_clock, rtl8139_timer, s);
3389 rtl8139_set_next_tctr_time(s, qemu_get_clock(vm_clock));
3390 return 0;
3391 }
3392
3393 static PCIDeviceInfo rtl8139_info = {
3394 .qdev.name = "rtl8139",
3395 .qdev.size = sizeof(RTL8139State),
3396 .qdev.reset = rtl8139_reset,
3397 .qdev.vmsd = &vmstate_rtl8139,
3398 .init = pci_rtl8139_init,
3399 .exit = pci_rtl8139_uninit,
3400 .romfile = "pxe-rtl8139.bin",
3401 .qdev.props = (Property[]) {
3402 DEFINE_NIC_PROPERTIES(RTL8139State, conf),
3403 DEFINE_PROP_END_OF_LIST(),
3404 }
3405 };
3406
3407 static void rtl8139_register_devices(void)
3408 {
3409 pci_qdev_register(&rtl8139_info);
3410 }
3411
3412 device_init(rtl8139_register_devices)
QEmu