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fix spelling in linux-user sub directory
[qemu.git] / hw / rtl8139.c
blobaa8ed0a919d8ef7ab3a0ce6e647fff0366d6413e
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 * 2011-Mar-22 Benjamin Poirier: Implemented VLAN offloading
49 */
50
51 /* For crc32 */
52 #include <zlib.h>
53
54 #include "hw.h"
55 #include "pci.h"
56 #include "dma.h"
57 #include "qemu-timer.h"
58 #include "net.h"
59 #include "loader.h"
60 #include "sysemu.h"
61 #include "iov.h"
62
63 /* debug RTL8139 card */
64 //#define DEBUG_RTL8139 1
65
66 #define PCI_FREQUENCY 33000000L
67
68 /* debug RTL8139 card C+ mode only */
69 //#define DEBUG_RTL8139CP 1
70
71 #define SET_MASKED(input, mask, curr) \
72 ( ( (input) & ~(mask) ) | ( (curr) & (mask) ) )
73
74 /* arg % size for size which is a power of 2 */
75 #define MOD2(input, size) \
76 ( ( input ) & ( size - 1 ) )
77
78 #define ETHER_ADDR_LEN 6
79 #define ETHER_TYPE_LEN 2
80 #define ETH_HLEN (ETHER_ADDR_LEN * 2 + ETHER_TYPE_LEN)
81 #define ETH_P_IP 0x0800 /* Internet Protocol packet */
82 #define ETH_P_8021Q 0x8100 /* 802.1Q VLAN Extended Header */
83 #define ETH_MTU 1500
84
85 #define VLAN_TCI_LEN 2
86 #define VLAN_HLEN (ETHER_TYPE_LEN + VLAN_TCI_LEN)
87
88 #if defined (DEBUG_RTL8139)
89 # define DPRINTF(fmt, ...) \
90 do { fprintf(stderr, "RTL8139: " fmt, ## __VA_ARGS__); } while (0)
91 #else
92 static inline GCC_FMT_ATTR(1, 2) int DPRINTF(const char *fmt, ...)
93 {
94 return 0;
95 }
96 #endif
97
98 /* Symbolic offsets to registers. */
99 enum RTL8139_registers {
100 MAC0 = 0, /* Ethernet hardware address. */
101 MAR0 = 8, /* Multicast filter. */
102 TxStatus0 = 0x10,/* Transmit status (Four 32bit registers). C mode only */
103 /* Dump Tally Conter control register(64bit). C+ mode only */
104 TxAddr0 = 0x20, /* Tx descriptors (also four 32bit). */
105 RxBuf = 0x30,
106 ChipCmd = 0x37,
107 RxBufPtr = 0x38,
108 RxBufAddr = 0x3A,
109 IntrMask = 0x3C,
110 IntrStatus = 0x3E,
111 TxConfig = 0x40,
112 RxConfig = 0x44,
113 Timer = 0x48, /* A general-purpose counter. */
114 RxMissed = 0x4C, /* 24 bits valid, write clears. */
115 Cfg9346 = 0x50,
116 Config0 = 0x51,
117 Config1 = 0x52,
118 FlashReg = 0x54,
119 MediaStatus = 0x58,
120 Config3 = 0x59,
121 Config4 = 0x5A, /* absent on RTL-8139A */
122 HltClk = 0x5B,
123 MultiIntr = 0x5C,
124 PCIRevisionID = 0x5E,
125 TxSummary = 0x60, /* TSAD register. Transmit Status of All Descriptors*/
126 BasicModeCtrl = 0x62,
127 BasicModeStatus = 0x64,
128 NWayAdvert = 0x66,
129 NWayLPAR = 0x68,
130 NWayExpansion = 0x6A,
131 /* Undocumented registers, but required for proper operation. */
132 FIFOTMS = 0x70, /* FIFO Control and test. */
133 CSCR = 0x74, /* Chip Status and Configuration Register. */
134 PARA78 = 0x78,
135 PARA7c = 0x7c, /* Magic transceiver parameter register. */
136 Config5 = 0xD8, /* absent on RTL-8139A */
137 /* C+ mode */
138 TxPoll = 0xD9, /* Tell chip to check Tx descriptors for work */
139 RxMaxSize = 0xDA, /* Max size of an Rx packet (8169 only) */
140 CpCmd = 0xE0, /* C+ Command register (C+ mode only) */
141 IntrMitigate = 0xE2, /* rx/tx interrupt mitigation control */
142 RxRingAddrLO = 0xE4, /* 64-bit start addr of Rx ring */
143 RxRingAddrHI = 0xE8, /* 64-bit start addr of Rx ring */
144 TxThresh = 0xEC, /* Early Tx threshold */
145 };
146
147 enum ClearBitMasks {
148 MultiIntrClear = 0xF000,
149 ChipCmdClear = 0xE2,
150 Config1Clear = (1<<7)|(1<<6)|(1<<3)|(1<<2)|(1<<1),
151 };
152
153 enum ChipCmdBits {
154 CmdReset = 0x10,
155 CmdRxEnb = 0x08,
156 CmdTxEnb = 0x04,
157 RxBufEmpty = 0x01,
158 };
159
160 /* C+ mode */
161 enum CplusCmdBits {
162 CPlusRxVLAN = 0x0040, /* enable receive VLAN detagging */
163 CPlusRxChkSum = 0x0020, /* enable receive checksum offloading */
164 CPlusRxEnb = 0x0002,
165 CPlusTxEnb = 0x0001,
166 };
167
168 /* Interrupt register bits, using my own meaningful names. */
169 enum IntrStatusBits {
170 PCIErr = 0x8000,
171 PCSTimeout = 0x4000,
172 RxFIFOOver = 0x40,
173 RxUnderrun = 0x20,
174 RxOverflow = 0x10,
175 TxErr = 0x08,
176 TxOK = 0x04,
177 RxErr = 0x02,
178 RxOK = 0x01,
179
180 RxAckBits = RxFIFOOver | RxOverflow | RxOK,
181 };
182
183 enum TxStatusBits {
184 TxHostOwns = 0x2000,
185 TxUnderrun = 0x4000,
186 TxStatOK = 0x8000,
187 TxOutOfWindow = 0x20000000,
188 TxAborted = 0x40000000,
189 TxCarrierLost = 0x80000000,
190 };
191 enum RxStatusBits {
192 RxMulticast = 0x8000,
193 RxPhysical = 0x4000,
194 RxBroadcast = 0x2000,
195 RxBadSymbol = 0x0020,
196 RxRunt = 0x0010,
197 RxTooLong = 0x0008,
198 RxCRCErr = 0x0004,
199 RxBadAlign = 0x0002,
200 RxStatusOK = 0x0001,
201 };
202
203 /* Bits in RxConfig. */
204 enum rx_mode_bits {
205 AcceptErr = 0x20,
206 AcceptRunt = 0x10,
207 AcceptBroadcast = 0x08,
208 AcceptMulticast = 0x04,
209 AcceptMyPhys = 0x02,
210 AcceptAllPhys = 0x01,
211 };
212
213 /* Bits in TxConfig. */
214 enum tx_config_bits {
215
216 /* Interframe Gap Time. Only TxIFG96 doesn't violate IEEE 802.3 */
217 TxIFGShift = 24,
218 TxIFG84 = (0 << TxIFGShift), /* 8.4us / 840ns (10 / 100Mbps) */
219 TxIFG88 = (1 << TxIFGShift), /* 8.8us / 880ns (10 / 100Mbps) */
220 TxIFG92 = (2 << TxIFGShift), /* 9.2us / 920ns (10 / 100Mbps) */
221 TxIFG96 = (3 << TxIFGShift), /* 9.6us / 960ns (10 / 100Mbps) */
222
223 TxLoopBack = (1 << 18) | (1 << 17), /* enable loopback test mode */
224 TxCRC = (1 << 16), /* DISABLE appending CRC to end of Tx packets */
225 TxClearAbt = (1 << 0), /* Clear abort (WO) */
226 TxDMAShift = 8, /* DMA burst value (0-7) is shifted this many bits */
227 TxRetryShift = 4, /* TXRR value (0-15) is shifted this many bits */
228
229 TxVersionMask = 0x7C800000, /* mask out version bits 30-26, 23 */
230 };
231
232
233 /* Transmit Status of All Descriptors (TSAD) Register */
234 enum TSAD_bits {
235 TSAD_TOK3 = 1<<15, // TOK bit of Descriptor 3
236 TSAD_TOK2 = 1<<14, // TOK bit of Descriptor 2
237 TSAD_TOK1 = 1<<13, // TOK bit of Descriptor 1
238 TSAD_TOK0 = 1<<12, // TOK bit of Descriptor 0
239 TSAD_TUN3 = 1<<11, // TUN bit of Descriptor 3
240 TSAD_TUN2 = 1<<10, // TUN bit of Descriptor 2
241 TSAD_TUN1 = 1<<9, // TUN bit of Descriptor 1
242 TSAD_TUN0 = 1<<8, // TUN bit of Descriptor 0
243 TSAD_TABT3 = 1<<07, // TABT bit of Descriptor 3
244 TSAD_TABT2 = 1<<06, // TABT bit of Descriptor 2
245 TSAD_TABT1 = 1<<05, // TABT bit of Descriptor 1
246 TSAD_TABT0 = 1<<04, // TABT bit of Descriptor 0
247 TSAD_OWN3 = 1<<03, // OWN bit of Descriptor 3
248 TSAD_OWN2 = 1<<02, // OWN bit of Descriptor 2
249 TSAD_OWN1 = 1<<01, // OWN bit of Descriptor 1
250 TSAD_OWN0 = 1<<00, // OWN bit of Descriptor 0
251 };
252
253
254 /* Bits in Config1 */
255 enum Config1Bits {
256 Cfg1_PM_Enable = 0x01,
257 Cfg1_VPD_Enable = 0x02,
258 Cfg1_PIO = 0x04,
259 Cfg1_MMIO = 0x08,
260 LWAKE = 0x10, /* not on 8139, 8139A */
261 Cfg1_Driver_Load = 0x20,
262 Cfg1_LED0 = 0x40,
263 Cfg1_LED1 = 0x80,
264 SLEEP = (1 << 1), /* only on 8139, 8139A */
265 PWRDN = (1 << 0), /* only on 8139, 8139A */
266 };
267
268 /* Bits in Config3 */
269 enum Config3Bits {
270 Cfg3_FBtBEn = (1 << 0), /* 1 = Fast Back to Back */
271 Cfg3_FuncRegEn = (1 << 1), /* 1 = enable CardBus Function registers */
272 Cfg3_CLKRUN_En = (1 << 2), /* 1 = enable CLKRUN */
273 Cfg3_CardB_En = (1 << 3), /* 1 = enable CardBus registers */
274 Cfg3_LinkUp = (1 << 4), /* 1 = wake up on link up */
275 Cfg3_Magic = (1 << 5), /* 1 = wake up on Magic Packet (tm) */
276 Cfg3_PARM_En = (1 << 6), /* 0 = software can set twister parameters */
277 Cfg3_GNTSel = (1 << 7), /* 1 = delay 1 clock from PCI GNT signal */
278 };
279
280 /* Bits in Config4 */
281 enum Config4Bits {
282 LWPTN = (1 << 2), /* not on 8139, 8139A */
283 };
284
285 /* Bits in Config5 */
286 enum Config5Bits {
287 Cfg5_PME_STS = (1 << 0), /* 1 = PCI reset resets PME_Status */
288 Cfg5_LANWake = (1 << 1), /* 1 = enable LANWake signal */
289 Cfg5_LDPS = (1 << 2), /* 0 = save power when link is down */
290 Cfg5_FIFOAddrPtr = (1 << 3), /* Realtek internal SRAM testing */
291 Cfg5_UWF = (1 << 4), /* 1 = accept unicast wakeup frame */
292 Cfg5_MWF = (1 << 5), /* 1 = accept multicast wakeup frame */
293 Cfg5_BWF = (1 << 6), /* 1 = accept broadcast wakeup frame */
294 };
295
296 enum RxConfigBits {
297 /* rx fifo threshold */
298 RxCfgFIFOShift = 13,
299 RxCfgFIFONone = (7 << RxCfgFIFOShift),
300
301 /* Max DMA burst */
302 RxCfgDMAShift = 8,
303 RxCfgDMAUnlimited = (7 << RxCfgDMAShift),
304
305 /* rx ring buffer length */
306 RxCfgRcv8K = 0,
307 RxCfgRcv16K = (1 << 11),
308 RxCfgRcv32K = (1 << 12),
309 RxCfgRcv64K = (1 << 11) | (1 << 12),
310
311 /* Disable packet wrap at end of Rx buffer. (not possible with 64k) */
312 RxNoWrap = (1 << 7),
313 };
314
315 /* Twister tuning parameters from RealTek.
316 Completely undocumented, but required to tune bad links on some boards. */
317 /*
318 enum CSCRBits {
319 CSCR_LinkOKBit = 0x0400,
320 CSCR_LinkChangeBit = 0x0800,
321 CSCR_LinkStatusBits = 0x0f000,
322 CSCR_LinkDownOffCmd = 0x003c0,
323 CSCR_LinkDownCmd = 0x0f3c0,
324 */
325 enum CSCRBits {
326 CSCR_Testfun = 1<<15, /* 1 = Auto-neg speeds up internal timer, WO, def 0 */
327 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*/
328 CSCR_HEART_BIT = 1<<8, /* 1 = HEART BEAT enable, 0 = HEART BEAT disable. HEART BEAT function is only valid in 10Mbps mode. def 1*/
329 CSCR_JBEN = 1<<7, /* 1 = enable jabber function. 0 = disable jabber function, def 1*/
330 CSCR_F_LINK_100 = 1<<6, /* Used to login force good link in 100Mbps for diagnostic purposes. 1 = DISABLE, 0 = ENABLE. def 1*/
331 CSCR_F_Connect = 1<<5, /* Assertion of this bit forces the disconnect function to be bypassed. def 0*/
332 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*/
333 CSCR_Con_status_En = 1<<2, /* Assertion of this bit configures LED1 pin to indicate connection status. def 0*/
334 CSCR_PASS_SCR = 1<<0, /* Bypass Scramble, def 0*/
335 };
336
337 enum Cfg9346Bits {
338 Cfg9346_Lock = 0x00,
339 Cfg9346_Unlock = 0xC0,
340 };
341
342 typedef enum {
343 CH_8139 = 0,
344 CH_8139_K,
345 CH_8139A,
346 CH_8139A_G,
347 CH_8139B,
348 CH_8130,
349 CH_8139C,
350 CH_8100,
351 CH_8100B_8139D,
352 CH_8101,
353 } chip_t;
354
355 enum chip_flags {
356 HasHltClk = (1 << 0),
357 HasLWake = (1 << 1),
358 };
359
360 #define HW_REVID(b30, b29, b28, b27, b26, b23, b22) \
361 (b30<<30 | b29<<29 | b28<<28 | b27<<27 | b26<<26 | b23<<23 | b22<<22)
362 #define HW_REVID_MASK HW_REVID(1, 1, 1, 1, 1, 1, 1)
363
364 #define RTL8139_PCI_REVID_8139 0x10
365 #define RTL8139_PCI_REVID_8139CPLUS 0x20
366
367 #define RTL8139_PCI_REVID RTL8139_PCI_REVID_8139CPLUS
368
369 /* Size is 64 * 16bit words */
370 #define EEPROM_9346_ADDR_BITS 6
371 #define EEPROM_9346_SIZE (1 << EEPROM_9346_ADDR_BITS)
372 #define EEPROM_9346_ADDR_MASK (EEPROM_9346_SIZE - 1)
373
374 enum Chip9346Operation
375 {
376 Chip9346_op_mask = 0xc0, /* 10 zzzzzz */
377 Chip9346_op_read = 0x80, /* 10 AAAAAA */
378 Chip9346_op_write = 0x40, /* 01 AAAAAA D(15)..D(0) */
379 Chip9346_op_ext_mask = 0xf0, /* 11 zzzzzz */
380 Chip9346_op_write_enable = 0x30, /* 00 11zzzz */
381 Chip9346_op_write_all = 0x10, /* 00 01zzzz */
382 Chip9346_op_write_disable = 0x00, /* 00 00zzzz */
383 };
384
385 enum Chip9346Mode
386 {
387 Chip9346_none = 0,
388 Chip9346_enter_command_mode,
389 Chip9346_read_command,
390 Chip9346_data_read, /* from output register */
391 Chip9346_data_write, /* to input register, then to contents at specified address */
392 Chip9346_data_write_all, /* to input register, then filling contents */
393 };
394
395 typedef struct EEprom9346
396 {
397 uint16_t contents[EEPROM_9346_SIZE];
398 int mode;
399 uint32_t tick;
400 uint8_t address;
401 uint16_t input;
402 uint16_t output;
403
404 uint8_t eecs;
405 uint8_t eesk;
406 uint8_t eedi;
407 uint8_t eedo;
408 } EEprom9346;
409
410 typedef struct RTL8139TallyCounters
411 {
412 /* Tally counters */
413 uint64_t TxOk;
414 uint64_t RxOk;
415 uint64_t TxERR;
416 uint32_t RxERR;
417 uint16_t MissPkt;
418 uint16_t FAE;
419 uint32_t Tx1Col;
420 uint32_t TxMCol;
421 uint64_t RxOkPhy;
422 uint64_t RxOkBrd;
423 uint32_t RxOkMul;
424 uint16_t TxAbt;
425 uint16_t TxUndrn;
426 } RTL8139TallyCounters;
427
428 /* Clears all tally counters */
429 static void RTL8139TallyCounters_clear(RTL8139TallyCounters* counters);
430
431 typedef struct RTL8139State {
432 PCIDevice dev;
433 uint8_t phys[8]; /* mac address */
434 uint8_t mult[8]; /* multicast mask array */
435
436 uint32_t TxStatus[4]; /* TxStatus0 in C mode*/ /* also DTCCR[0] and DTCCR[1] in C+ mode */
437 uint32_t TxAddr[4]; /* TxAddr0 */
438 uint32_t RxBuf; /* Receive buffer */
439 uint32_t RxBufferSize;/* internal variable, receive ring buffer size in C mode */
440 uint32_t RxBufPtr;
441 uint32_t RxBufAddr;
442
443 uint16_t IntrStatus;
444 uint16_t IntrMask;
445
446 uint32_t TxConfig;
447 uint32_t RxConfig;
448 uint32_t RxMissed;
449
450 uint16_t CSCR;
451
452 uint8_t Cfg9346;
453 uint8_t Config0;
454 uint8_t Config1;
455 uint8_t Config3;
456 uint8_t Config4;
457 uint8_t Config5;
458
459 uint8_t clock_enabled;
460 uint8_t bChipCmdState;
461
462 uint16_t MultiIntr;
463
464 uint16_t BasicModeCtrl;
465 uint16_t BasicModeStatus;
466 uint16_t NWayAdvert;
467 uint16_t NWayLPAR;
468 uint16_t NWayExpansion;
469
470 uint16_t CpCmd;
471 uint8_t TxThresh;
472
473 NICState *nic;
474 NICConf conf;
475
476 /* C ring mode */
477 uint32_t currTxDesc;
478
479 /* C+ mode */
480 uint32_t cplus_enabled;
481
482 uint32_t currCPlusRxDesc;
483 uint32_t currCPlusTxDesc;
484
485 uint32_t RxRingAddrLO;
486 uint32_t RxRingAddrHI;
487
488 EEprom9346 eeprom;
489
490 uint32_t TCTR;
491 uint32_t TimerInt;
492 int64_t TCTR_base;
493
494 /* Tally counters */
495 RTL8139TallyCounters tally_counters;
496
497 /* Non-persistent data */
498 uint8_t *cplus_txbuffer;
499 int cplus_txbuffer_len;
500 int cplus_txbuffer_offset;
501
502 /* PCI interrupt timer */
503 QEMUTimer *timer;
504 int64_t TimerExpire;
505
506 MemoryRegion bar_io;
507 MemoryRegion bar_mem;
508
509 /* Support migration to/from old versions */
510 int rtl8139_mmio_io_addr_dummy;
511 } RTL8139State;
512
513 /* Writes tally counters to memory via DMA */
514 static void RTL8139TallyCounters_dma_write(RTL8139State *s, dma_addr_t tc_addr);
515
516 static void rtl8139_set_next_tctr_time(RTL8139State *s, int64_t current_time);
517
518 static void prom9346_decode_command(EEprom9346 *eeprom, uint8_t command)
519 {
520 DPRINTF("eeprom command 0x%02x\n", command);
521
522 switch (command & Chip9346_op_mask)
523 {
524 case Chip9346_op_read:
525 {
526 eeprom->address = command & EEPROM_9346_ADDR_MASK;
527 eeprom->output = eeprom->contents[eeprom->address];
528 eeprom->eedo = 0;
529 eeprom->tick = 0;
530 eeprom->mode = Chip9346_data_read;
531 DPRINTF("eeprom read from address 0x%02x data=0x%04x\n",
532 eeprom->address, eeprom->output);
533 }
534 break;
535
536 case Chip9346_op_write:
537 {
538 eeprom->address = command & EEPROM_9346_ADDR_MASK;
539 eeprom->input = 0;
540 eeprom->tick = 0;
541 eeprom->mode = Chip9346_none; /* Chip9346_data_write */
542 DPRINTF("eeprom begin write to address 0x%02x\n",
543 eeprom->address);
544 }
545 break;
546 default:
547 eeprom->mode = Chip9346_none;
548 switch (command & Chip9346_op_ext_mask)
549 {
550 case Chip9346_op_write_enable:
551 DPRINTF("eeprom write enabled\n");
552 break;
553 case Chip9346_op_write_all:
554 DPRINTF("eeprom begin write all\n");
555 break;
556 case Chip9346_op_write_disable:
557 DPRINTF("eeprom write disabled\n");
558 break;
559 }
560 break;
561 }
562 }
563
564 static void prom9346_shift_clock(EEprom9346 *eeprom)
565 {
566 int bit = eeprom->eedi?1:0;
567
568 ++ eeprom->tick;
569
570 DPRINTF("eeprom: tick %d eedi=%d eedo=%d\n", eeprom->tick, eeprom->eedi,
571 eeprom->eedo);
572
573 switch (eeprom->mode)
574 {
575 case Chip9346_enter_command_mode:
576 if (bit)
577 {
578 eeprom->mode = Chip9346_read_command;
579 eeprom->tick = 0;
580 eeprom->input = 0;
581 DPRINTF("eeprom: +++ synchronized, begin command read\n");
582 }
583 break;
584
585 case Chip9346_read_command:
586 eeprom->input = (eeprom->input << 1) | (bit & 1);
587 if (eeprom->tick == 8)
588 {
589 prom9346_decode_command(eeprom, eeprom->input & 0xff);
590 }
591 break;
592
593 case Chip9346_data_read:
594 eeprom->eedo = (eeprom->output & 0x8000)?1:0;
595 eeprom->output <<= 1;
596 if (eeprom->tick == 16)
597 {
598 #if 1
599 // the FreeBSD drivers (rl and re) don't explicitly toggle
600 // CS between reads (or does setting Cfg9346 to 0 count too?),
601 // so we need to enter wait-for-command state here
602 eeprom->mode = Chip9346_enter_command_mode;
603 eeprom->input = 0;
604 eeprom->tick = 0;
605
606 DPRINTF("eeprom: +++ end of read, awaiting next command\n");
607 #else
608 // original behaviour
609 ++eeprom->address;
610 eeprom->address &= EEPROM_9346_ADDR_MASK;
611 eeprom->output = eeprom->contents[eeprom->address];
612 eeprom->tick = 0;
613
614 DPRINTF("eeprom: +++ read next address 0x%02x data=0x%04x\n",
615 eeprom->address, eeprom->output);
616 #endif
617 }
618 break;
619
620 case Chip9346_data_write:
621 eeprom->input = (eeprom->input << 1) | (bit & 1);
622 if (eeprom->tick == 16)
623 {
624 DPRINTF("eeprom write to address 0x%02x data=0x%04x\n",
625 eeprom->address, eeprom->input);
626
627 eeprom->contents[eeprom->address] = eeprom->input;
628 eeprom->mode = Chip9346_none; /* waiting for next command after CS cycle */
629 eeprom->tick = 0;
630 eeprom->input = 0;
631 }
632 break;
633
634 case Chip9346_data_write_all:
635 eeprom->input = (eeprom->input << 1) | (bit & 1);
636 if (eeprom->tick == 16)
637 {
638 int i;
639 for (i = 0; i < EEPROM_9346_SIZE; i++)
640 {
641 eeprom->contents[i] = eeprom->input;
642 }
643 DPRINTF("eeprom filled with data=0x%04x\n", eeprom->input);
644
645 eeprom->mode = Chip9346_enter_command_mode;
646 eeprom->tick = 0;
647 eeprom->input = 0;
648 }
649 break;
650
651 default:
652 break;
653 }
654 }
655
656 static int prom9346_get_wire(RTL8139State *s)
657 {
658 EEprom9346 *eeprom = &s->eeprom;
659 if (!eeprom->eecs)
660 return 0;
661
662 return eeprom->eedo;
663 }
664
665 /* FIXME: This should be merged into/replaced by eeprom93xx.c. */
666 static void prom9346_set_wire(RTL8139State *s, int eecs, int eesk, int eedi)
667 {
668 EEprom9346 *eeprom = &s->eeprom;
669 uint8_t old_eecs = eeprom->eecs;
670 uint8_t old_eesk = eeprom->eesk;
671
672 eeprom->eecs = eecs;
673 eeprom->eesk = eesk;
674 eeprom->eedi = eedi;
675
676 DPRINTF("eeprom: +++ wires CS=%d SK=%d DI=%d DO=%d\n", eeprom->eecs,
677 eeprom->eesk, eeprom->eedi, eeprom->eedo);
678
679 if (!old_eecs && eecs)
680 {
681 /* Synchronize start */
682 eeprom->tick = 0;
683 eeprom->input = 0;
684 eeprom->output = 0;
685 eeprom->mode = Chip9346_enter_command_mode;
686
687 DPRINTF("=== eeprom: begin access, enter command mode\n");
688 }
689
690 if (!eecs)
691 {
692 DPRINTF("=== eeprom: end access\n");
693 return;
694 }
695
696 if (!old_eesk && eesk)
697 {
698 /* SK front rules */
699 prom9346_shift_clock(eeprom);
700 }
701 }
702
703 static void rtl8139_update_irq(RTL8139State *s)
704 {
705 int isr;
706 isr = (s->IntrStatus & s->IntrMask) & 0xffff;
707
708 DPRINTF("Set IRQ to %d (%04x %04x)\n", isr ? 1 : 0, s->IntrStatus,
709 s->IntrMask);
710
711 qemu_set_irq(s->dev.irq[0], (isr != 0));
712 }
713
714 #define POLYNOMIAL 0x04c11db6
715
716 /* From FreeBSD */
717 /* XXX: optimize */
718 static int compute_mcast_idx(const uint8_t *ep)
719 {
720 uint32_t crc;
721 int carry, i, j;
722 uint8_t b;
723
724 crc = 0xffffffff;
725 for (i = 0; i < 6; i++) {
726 b = *ep++;
727 for (j = 0; j < 8; j++) {
728 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
729 crc <<= 1;
730 b >>= 1;
731 if (carry)
732 crc = ((crc ^ POLYNOMIAL) | carry);
733 }
734 }
735 return (crc >> 26);
736 }
737
738 static int rtl8139_RxWrap(RTL8139State *s)
739 {
740 /* wrapping enabled; assume 1.5k more buffer space if size < 65536 */
741 return (s->RxConfig & (1 << 7));
742 }
743
744 static int rtl8139_receiver_enabled(RTL8139State *s)
745 {
746 return s->bChipCmdState & CmdRxEnb;
747 }
748
749 static int rtl8139_transmitter_enabled(RTL8139State *s)
750 {
751 return s->bChipCmdState & CmdTxEnb;
752 }
753
754 static int rtl8139_cp_receiver_enabled(RTL8139State *s)
755 {
756 return s->CpCmd & CPlusRxEnb;
757 }
758
759 static int rtl8139_cp_transmitter_enabled(RTL8139State *s)
760 {
761 return s->CpCmd & CPlusTxEnb;
762 }
763
764 static void rtl8139_write_buffer(RTL8139State *s, const void *buf, int size)
765 {
766 if (s->RxBufAddr + size > s->RxBufferSize)
767 {
768 int wrapped = MOD2(s->RxBufAddr + size, s->RxBufferSize);
769
770 /* write packet data */
771 if (wrapped && !(s->RxBufferSize < 65536 && rtl8139_RxWrap(s)))
772 {
773 DPRINTF(">>> rx packet wrapped in buffer at %d\n", size - wrapped);
774
775 if (size > wrapped)
776 {
777 pci_dma_write(&s->dev, s->RxBuf + s->RxBufAddr,
778 buf, size-wrapped);
779 }
780
781 /* reset buffer pointer */
782 s->RxBufAddr = 0;
783
784 pci_dma_write(&s->dev, s->RxBuf + s->RxBufAddr,
785 buf + (size-wrapped), wrapped);
786
787 s->RxBufAddr = wrapped;
788
789 return;
790 }
791 }
792
793 /* non-wrapping path or overwrapping enabled */
794 pci_dma_write(&s->dev, s->RxBuf + s->RxBufAddr, buf, size);
795
796 s->RxBufAddr += size;
797 }
798
799 #define MIN_BUF_SIZE 60
800 static inline dma_addr_t rtl8139_addr64(uint32_t low, uint32_t high)
801 {
802 #if TARGET_PHYS_ADDR_BITS > 32
803 return low | ((target_phys_addr_t)high << 32);
804 #else
805 return low;
806 #endif
807 }
808
809 static int rtl8139_can_receive(VLANClientState *nc)
810 {
811 RTL8139State *s = DO_UPCAST(NICState, nc, nc)->opaque;
812 int avail;
813
814 /* Receive (drop) packets if card is disabled. */
815 if (!s->clock_enabled)
816 return 1;
817 if (!rtl8139_receiver_enabled(s))
818 return 1;
819
820 if (rtl8139_cp_receiver_enabled(s)) {
821 /* ??? Flow control not implemented in c+ mode.
822 This is a hack to work around slirp deficiencies anyway. */
823 return 1;
824 } else {
825 avail = MOD2(s->RxBufferSize + s->RxBufPtr - s->RxBufAddr,
826 s->RxBufferSize);
827 return (avail == 0 || avail >= 1514);
828 }
829 }
830
831 static ssize_t rtl8139_do_receive(VLANClientState *nc, const uint8_t *buf, size_t size_, int do_interrupt)
832 {
833 RTL8139State *s = DO_UPCAST(NICState, nc, nc)->opaque;
834 /* size is the length of the buffer passed to the driver */
835 int size = size_;
836 const uint8_t *dot1q_buf = NULL;
837
838 uint32_t packet_header = 0;
839
840 uint8_t buf1[MIN_BUF_SIZE + VLAN_HLEN];
841 static const uint8_t broadcast_macaddr[6] =
842 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
843
844 DPRINTF(">>> received len=%d\n", size);
845
846 /* test if board clock is stopped */
847 if (!s->clock_enabled)
848 {
849 DPRINTF("stopped ==========================\n");
850 return -1;
851 }
852
853 /* first check if receiver is enabled */
854
855 if (!rtl8139_receiver_enabled(s))
856 {
857 DPRINTF("receiver disabled ================\n");
858 return -1;
859 }
860
861 /* XXX: check this */
862 if (s->RxConfig & AcceptAllPhys) {
863 /* promiscuous: receive all */
864 DPRINTF(">>> packet received in promiscuous mode\n");
865
866 } else {
867 if (!memcmp(buf, broadcast_macaddr, 6)) {
868 /* broadcast address */
869 if (!(s->RxConfig & AcceptBroadcast))
870 {
871 DPRINTF(">>> broadcast packet rejected\n");
872
873 /* update tally counter */
874 ++s->tally_counters.RxERR;
875
876 return size;
877 }
878
879 packet_header |= RxBroadcast;
880
881 DPRINTF(">>> broadcast packet received\n");
882
883 /* update tally counter */
884 ++s->tally_counters.RxOkBrd;
885
886 } else if (buf[0] & 0x01) {
887 /* multicast */
888 if (!(s->RxConfig & AcceptMulticast))
889 {
890 DPRINTF(">>> multicast packet rejected\n");
891
892 /* update tally counter */
893 ++s->tally_counters.RxERR;
894
895 return size;
896 }
897
898 int mcast_idx = compute_mcast_idx(buf);
899
900 if (!(s->mult[mcast_idx >> 3] & (1 << (mcast_idx & 7))))
901 {
902 DPRINTF(">>> multicast address mismatch\n");
903
904 /* update tally counter */
905 ++s->tally_counters.RxERR;
906
907 return size;
908 }
909
910 packet_header |= RxMulticast;
911
912 DPRINTF(">>> multicast packet received\n");
913
914 /* update tally counter */
915 ++s->tally_counters.RxOkMul;
916
917 } else if (s->phys[0] == buf[0] &&
918 s->phys[1] == buf[1] &&
919 s->phys[2] == buf[2] &&
920 s->phys[3] == buf[3] &&
921 s->phys[4] == buf[4] &&
922 s->phys[5] == buf[5]) {
923 /* match */
924 if (!(s->RxConfig & AcceptMyPhys))
925 {
926 DPRINTF(">>> rejecting physical address matching packet\n");
927
928 /* update tally counter */
929 ++s->tally_counters.RxERR;
930
931 return size;
932 }
933
934 packet_header |= RxPhysical;
935
936 DPRINTF(">>> physical address matching packet received\n");
937
938 /* update tally counter */
939 ++s->tally_counters.RxOkPhy;
940
941 } else {
942
943 DPRINTF(">>> unknown packet\n");
944
945 /* update tally counter */
946 ++s->tally_counters.RxERR;
947
948 return size;
949 }
950 }
951
952 /* if too small buffer, then expand it
953 * Include some tailroom in case a vlan tag is later removed. */
954 if (size < MIN_BUF_SIZE + VLAN_HLEN) {
955 memcpy(buf1, buf, size);
956 memset(buf1 + size, 0, MIN_BUF_SIZE + VLAN_HLEN - size);
957 buf = buf1;
958 if (size < MIN_BUF_SIZE) {
959 size = MIN_BUF_SIZE;
960 }
961 }
962
963 if (rtl8139_cp_receiver_enabled(s))
964 {
965 DPRINTF("in C+ Rx mode ================\n");
966
967 /* begin C+ receiver mode */
968
969 /* w0 ownership flag */
970 #define CP_RX_OWN (1<<31)
971 /* w0 end of ring flag */
972 #define CP_RX_EOR (1<<30)
973 /* w0 bits 0...12 : buffer size */
974 #define CP_RX_BUFFER_SIZE_MASK ((1<<13) - 1)
975 /* w1 tag available flag */
976 #define CP_RX_TAVA (1<<16)
977 /* w1 bits 0...15 : VLAN tag */
978 #define CP_RX_VLAN_TAG_MASK ((1<<16) - 1)
979 /* w2 low 32bit of Rx buffer ptr */
980 /* w3 high 32bit of Rx buffer ptr */
981
982 int descriptor = s->currCPlusRxDesc;
983 dma_addr_t cplus_rx_ring_desc;
984
985 cplus_rx_ring_desc = rtl8139_addr64(s->RxRingAddrLO, s->RxRingAddrHI);
986 cplus_rx_ring_desc += 16 * descriptor;
987
988 DPRINTF("+++ C+ mode reading RX descriptor %d from host memory at "
989 "%08x %08x = "DMA_ADDR_FMT"\n", descriptor, s->RxRingAddrHI,
990 s->RxRingAddrLO, cplus_rx_ring_desc);
991
992 uint32_t val, rxdw0,rxdw1,rxbufLO,rxbufHI;
993
994 pci_dma_read(&s->dev, cplus_rx_ring_desc, (uint8_t *)&val, 4);
995 rxdw0 = le32_to_cpu(val);
996 pci_dma_read(&s->dev, cplus_rx_ring_desc+4, (uint8_t *)&val, 4);
997 rxdw1 = le32_to_cpu(val);
998 pci_dma_read(&s->dev, cplus_rx_ring_desc+8, (uint8_t *)&val, 4);
999 rxbufLO = le32_to_cpu(val);
1000 pci_dma_read(&s->dev, cplus_rx_ring_desc+12, (uint8_t *)&val, 4);
1001 rxbufHI = le32_to_cpu(val);
1002
1003 DPRINTF("+++ C+ mode RX descriptor %d %08x %08x %08x %08x\n",
1004 descriptor, rxdw0, rxdw1, rxbufLO, rxbufHI);
1005
1006 if (!(rxdw0 & CP_RX_OWN))
1007 {
1008 DPRINTF("C+ Rx mode : descriptor %d is owned by host\n",
1009 descriptor);
1010
1011 s->IntrStatus |= RxOverflow;
1012 ++s->RxMissed;
1013
1014 /* update tally counter */
1015 ++s->tally_counters.RxERR;
1016 ++s->tally_counters.MissPkt;
1017
1018 rtl8139_update_irq(s);
1019 return size_;
1020 }
1021
1022 uint32_t rx_space = rxdw0 & CP_RX_BUFFER_SIZE_MASK;
1023
1024 /* write VLAN info to descriptor variables. */
1025 if (s->CpCmd & CPlusRxVLAN && be16_to_cpup((uint16_t *)
1026 &buf[ETHER_ADDR_LEN * 2]) == ETH_P_8021Q) {
1027 dot1q_buf = &buf[ETHER_ADDR_LEN * 2];
1028 size -= VLAN_HLEN;
1029 /* if too small buffer, use the tailroom added duing expansion */
1030 if (size < MIN_BUF_SIZE) {
1031 size = MIN_BUF_SIZE;
1032 }
1033
1034 rxdw1 &= ~CP_RX_VLAN_TAG_MASK;
1035 /* BE + ~le_to_cpu()~ + cpu_to_le() = BE */
1036 rxdw1 |= CP_RX_TAVA | le16_to_cpup((uint16_t *)
1037 &dot1q_buf[ETHER_TYPE_LEN]);
1038
1039 DPRINTF("C+ Rx mode : extracted vlan tag with tci: ""%u\n",
1040 be16_to_cpup((uint16_t *)&dot1q_buf[ETHER_TYPE_LEN]));
1041 } else {
1042 /* reset VLAN tag flag */
1043 rxdw1 &= ~CP_RX_TAVA;
1044 }
1045
1046 /* TODO: scatter the packet over available receive ring descriptors space */
1047
1048 if (size+4 > rx_space)
1049 {
1050 DPRINTF("C+ Rx mode : descriptor %d size %d received %d + 4\n",
1051 descriptor, rx_space, size);
1052
1053 s->IntrStatus |= RxOverflow;
1054 ++s->RxMissed;
1055
1056 /* update tally counter */
1057 ++s->tally_counters.RxERR;
1058 ++s->tally_counters.MissPkt;
1059
1060 rtl8139_update_irq(s);
1061 return size_;
1062 }
1063
1064 dma_addr_t rx_addr = rtl8139_addr64(rxbufLO, rxbufHI);
1065
1066 /* receive/copy to target memory */
1067 if (dot1q_buf) {
1068 pci_dma_write(&s->dev, rx_addr, buf, 2 * ETHER_ADDR_LEN);
1069 pci_dma_write(&s->dev, rx_addr + 2 * ETHER_ADDR_LEN,
1070 buf + 2 * ETHER_ADDR_LEN + VLAN_HLEN,
1071 size - 2 * ETHER_ADDR_LEN);
1072 } else {
1073 pci_dma_write(&s->dev, rx_addr, buf, size);
1074 }
1075
1076 if (s->CpCmd & CPlusRxChkSum)
1077 {
1078 /* do some packet checksumming */
1079 }
1080
1081 /* write checksum */
1082 val = cpu_to_le32(crc32(0, buf, size_));
1083 pci_dma_write(&s->dev, rx_addr+size, (uint8_t *)&val, 4);
1084
1085 /* first segment of received packet flag */
1086 #define CP_RX_STATUS_FS (1<<29)
1087 /* last segment of received packet flag */
1088 #define CP_RX_STATUS_LS (1<<28)
1089 /* multicast packet flag */
1090 #define CP_RX_STATUS_MAR (1<<26)
1091 /* physical-matching packet flag */
1092 #define CP_RX_STATUS_PAM (1<<25)
1093 /* broadcast packet flag */
1094 #define CP_RX_STATUS_BAR (1<<24)
1095 /* runt packet flag */
1096 #define CP_RX_STATUS_RUNT (1<<19)
1097 /* crc error flag */
1098 #define CP_RX_STATUS_CRC (1<<18)
1099 /* IP checksum error flag */
1100 #define CP_RX_STATUS_IPF (1<<15)
1101 /* UDP checksum error flag */
1102 #define CP_RX_STATUS_UDPF (1<<14)
1103 /* TCP checksum error flag */
1104 #define CP_RX_STATUS_TCPF (1<<13)
1105
1106 /* transfer ownership to target */
1107 rxdw0 &= ~CP_RX_OWN;
1108
1109 /* set first segment bit */
1110 rxdw0 |= CP_RX_STATUS_FS;
1111
1112 /* set last segment bit */
1113 rxdw0 |= CP_RX_STATUS_LS;
1114
1115 /* set received packet type flags */
1116 if (packet_header & RxBroadcast)
1117 rxdw0 |= CP_RX_STATUS_BAR;
1118 if (packet_header & RxMulticast)
1119 rxdw0 |= CP_RX_STATUS_MAR;
1120 if (packet_header & RxPhysical)
1121 rxdw0 |= CP_RX_STATUS_PAM;
1122
1123 /* set received size */
1124 rxdw0 &= ~CP_RX_BUFFER_SIZE_MASK;
1125 rxdw0 |= (size+4);
1126
1127 /* update ring data */
1128 val = cpu_to_le32(rxdw0);
1129 pci_dma_write(&s->dev, cplus_rx_ring_desc, (uint8_t *)&val, 4);
1130 val = cpu_to_le32(rxdw1);
1131 pci_dma_write(&s->dev, cplus_rx_ring_desc+4, (uint8_t *)&val, 4);
1132
1133 /* update tally counter */
1134 ++s->tally_counters.RxOk;
1135
1136 /* seek to next Rx descriptor */
1137 if (rxdw0 & CP_RX_EOR)
1138 {
1139 s->currCPlusRxDesc = 0;
1140 }
1141 else
1142 {
1143 ++s->currCPlusRxDesc;
1144 }
1145
1146 DPRINTF("done C+ Rx mode ----------------\n");
1147
1148 }
1149 else
1150 {
1151 DPRINTF("in ring Rx mode ================\n");
1152
1153 /* begin ring receiver mode */
1154 int avail = MOD2(s->RxBufferSize + s->RxBufPtr - s->RxBufAddr, s->RxBufferSize);
1155
1156 /* if receiver buffer is empty then avail == 0 */
1157
1158 if (avail != 0 && size + 8 >= avail)
1159 {
1160 DPRINTF("rx overflow: rx buffer length %d head 0x%04x "
1161 "read 0x%04x === available 0x%04x need 0x%04x\n",
1162 s->RxBufferSize, s->RxBufAddr, s->RxBufPtr, avail, size + 8);
1163
1164 s->IntrStatus |= RxOverflow;
1165 ++s->RxMissed;
1166 rtl8139_update_irq(s);
1167 return size_;
1168 }
1169
1170 packet_header |= RxStatusOK;
1171
1172 packet_header |= (((size+4) << 16) & 0xffff0000);
1173
1174 /* write header */
1175 uint32_t val = cpu_to_le32(packet_header);
1176
1177 rtl8139_write_buffer(s, (uint8_t *)&val, 4);
1178
1179 rtl8139_write_buffer(s, buf, size);
1180
1181 /* write checksum */
1182 val = cpu_to_le32(crc32(0, buf, size));
1183 rtl8139_write_buffer(s, (uint8_t *)&val, 4);
1184
1185 /* correct buffer write pointer */
1186 s->RxBufAddr = MOD2((s->RxBufAddr + 3) & ~0x3, s->RxBufferSize);
1187
1188 /* now we can signal we have received something */
1189
1190 DPRINTF("received: rx buffer length %d head 0x%04x read 0x%04x\n",
1191 s->RxBufferSize, s->RxBufAddr, s->RxBufPtr);
1192 }
1193
1194 s->IntrStatus |= RxOK;
1195
1196 if (do_interrupt)
1197 {
1198 rtl8139_update_irq(s);
1199 }
1200
1201 return size_;
1202 }
1203
1204 static ssize_t rtl8139_receive(VLANClientState *nc, const uint8_t *buf, size_t size)
1205 {
1206 return rtl8139_do_receive(nc, buf, size, 1);
1207 }
1208
1209 static void rtl8139_reset_rxring(RTL8139State *s, uint32_t bufferSize)
1210 {
1211 s->RxBufferSize = bufferSize;
1212 s->RxBufPtr = 0;
1213 s->RxBufAddr = 0;
1214 }
1215
1216 static void rtl8139_reset(DeviceState *d)
1217 {
1218 RTL8139State *s = container_of(d, RTL8139State, dev.qdev);
1219 int i;
1220
1221 /* restore MAC address */
1222 memcpy(s->phys, s->conf.macaddr.a, 6);
1223
1224 /* reset interrupt mask */
1225 s->IntrStatus = 0;
1226 s->IntrMask = 0;
1227
1228 rtl8139_update_irq(s);
1229
1230 /* mark all status registers as owned by host */
1231 for (i = 0; i < 4; ++i)
1232 {
1233 s->TxStatus[i] = TxHostOwns;
1234 }
1235
1236 s->currTxDesc = 0;
1237 s->currCPlusRxDesc = 0;
1238 s->currCPlusTxDesc = 0;
1239
1240 s->RxRingAddrLO = 0;
1241 s->RxRingAddrHI = 0;
1242
1243 s->RxBuf = 0;
1244
1245 rtl8139_reset_rxring(s, 8192);
1246
1247 /* ACK the reset */
1248 s->TxConfig = 0;
1249
1250 #if 0
1251 // s->TxConfig |= HW_REVID(1, 0, 0, 0, 0, 0, 0); // RTL-8139 HasHltClk
1252 s->clock_enabled = 0;
1253 #else
1254 s->TxConfig |= HW_REVID(1, 1, 1, 0, 1, 1, 0); // RTL-8139C+ HasLWake
1255 s->clock_enabled = 1;
1256 #endif
1257
1258 s->bChipCmdState = CmdReset; /* RxBufEmpty bit is calculated on read from ChipCmd */;
1259
1260 /* set initial state data */
1261 s->Config0 = 0x0; /* No boot ROM */
1262 s->Config1 = 0xC; /* IO mapped and MEM mapped registers available */
1263 s->Config3 = 0x1; /* fast back-to-back compatible */
1264 s->Config5 = 0x0;
1265
1266 s->CSCR = CSCR_F_LINK_100 | CSCR_HEART_BIT | CSCR_LD;
1267
1268 s->CpCmd = 0x0; /* reset C+ mode */
1269 s->cplus_enabled = 0;
1270
1271
1272 // s->BasicModeCtrl = 0x3100; // 100Mbps, full duplex, autonegotiation
1273 // s->BasicModeCtrl = 0x2100; // 100Mbps, full duplex
1274 s->BasicModeCtrl = 0x1000; // autonegotiation
1275
1276 s->BasicModeStatus = 0x7809;
1277 //s->BasicModeStatus |= 0x0040; /* UTP medium */
1278 s->BasicModeStatus |= 0x0020; /* autonegotiation completed */
1279 s->BasicModeStatus |= 0x0004; /* link is up */
1280
1281 s->NWayAdvert = 0x05e1; /* all modes, full duplex */
1282 s->NWayLPAR = 0x05e1; /* all modes, full duplex */
1283 s->NWayExpansion = 0x0001; /* autonegotiation supported */
1284
1285 /* also reset timer and disable timer interrupt */
1286 s->TCTR = 0;
1287 s->TimerInt = 0;
1288 s->TCTR_base = 0;
1289
1290 /* reset tally counters */
1291 RTL8139TallyCounters_clear(&s->tally_counters);
1292 }
1293
1294 static void RTL8139TallyCounters_clear(RTL8139TallyCounters* counters)
1295 {
1296 counters->TxOk = 0;
1297 counters->RxOk = 0;
1298 counters->TxERR = 0;
1299 counters->RxERR = 0;
1300 counters->MissPkt = 0;
1301 counters->FAE = 0;
1302 counters->Tx1Col = 0;
1303 counters->TxMCol = 0;
1304 counters->RxOkPhy = 0;
1305 counters->RxOkBrd = 0;
1306 counters->RxOkMul = 0;
1307 counters->TxAbt = 0;
1308 counters->TxUndrn = 0;
1309 }
1310
1311 static void RTL8139TallyCounters_dma_write(RTL8139State *s, dma_addr_t tc_addr)
1312 {
1313 RTL8139TallyCounters *tally_counters = &s->tally_counters;
1314 uint16_t val16;
1315 uint32_t val32;
1316 uint64_t val64;
1317
1318 val64 = cpu_to_le64(tally_counters->TxOk);
1319 pci_dma_write(&s->dev, tc_addr + 0, (uint8_t *)&val64, 8);
1320
1321 val64 = cpu_to_le64(tally_counters->RxOk);
1322 pci_dma_write(&s->dev, tc_addr + 8, (uint8_t *)&val64, 8);
1323
1324 val64 = cpu_to_le64(tally_counters->TxERR);
1325 pci_dma_write(&s->dev, tc_addr + 16, (uint8_t *)&val64, 8);
1326
1327 val32 = cpu_to_le32(tally_counters->RxERR);
1328 pci_dma_write(&s->dev, tc_addr + 24, (uint8_t *)&val32, 4);
1329
1330 val16 = cpu_to_le16(tally_counters->MissPkt);
1331 pci_dma_write(&s->dev, tc_addr + 28, (uint8_t *)&val16, 2);
1332
1333 val16 = cpu_to_le16(tally_counters->FAE);
1334 pci_dma_write(&s->dev, tc_addr + 30, (uint8_t *)&val16, 2);
1335
1336 val32 = cpu_to_le32(tally_counters->Tx1Col);
1337 pci_dma_write(&s->dev, tc_addr + 32, (uint8_t *)&val32, 4);
1338
1339 val32 = cpu_to_le32(tally_counters->TxMCol);
1340 pci_dma_write(&s->dev, tc_addr + 36, (uint8_t *)&val32, 4);
1341
1342 val64 = cpu_to_le64(tally_counters->RxOkPhy);
1343 pci_dma_write(&s->dev, tc_addr + 40, (uint8_t *)&val64, 8);
1344
1345 val64 = cpu_to_le64(tally_counters->RxOkBrd);
1346 pci_dma_write(&s->dev, tc_addr + 48, (uint8_t *)&val64, 8);
1347
1348 val32 = cpu_to_le32(tally_counters->RxOkMul);
1349 pci_dma_write(&s->dev, tc_addr + 56, (uint8_t *)&val32, 4);
1350
1351 val16 = cpu_to_le16(tally_counters->TxAbt);
1352 pci_dma_write(&s->dev, tc_addr + 60, (uint8_t *)&val16, 2);
1353
1354 val16 = cpu_to_le16(tally_counters->TxUndrn);
1355 pci_dma_write(&s->dev, tc_addr + 62, (uint8_t *)&val16, 2);
1356 }
1357
1358 /* Loads values of tally counters from VM state file */
1359
1360 static const VMStateDescription vmstate_tally_counters = {
1361 .name = "tally_counters",
1362 .version_id = 1,
1363 .minimum_version_id = 1,
1364 .minimum_version_id_old = 1,
1365 .fields = (VMStateField []) {
1366 VMSTATE_UINT64(TxOk, RTL8139TallyCounters),
1367 VMSTATE_UINT64(RxOk, RTL8139TallyCounters),
1368 VMSTATE_UINT64(TxERR, RTL8139TallyCounters),
1369 VMSTATE_UINT32(RxERR, RTL8139TallyCounters),
1370 VMSTATE_UINT16(MissPkt, RTL8139TallyCounters),
1371 VMSTATE_UINT16(FAE, RTL8139TallyCounters),
1372 VMSTATE_UINT32(Tx1Col, RTL8139TallyCounters),
1373 VMSTATE_UINT32(TxMCol, RTL8139TallyCounters),
1374 VMSTATE_UINT64(RxOkPhy, RTL8139TallyCounters),
1375 VMSTATE_UINT64(RxOkBrd, RTL8139TallyCounters),
1376 VMSTATE_UINT16(TxAbt, RTL8139TallyCounters),
1377 VMSTATE_UINT16(TxUndrn, RTL8139TallyCounters),
1378 VMSTATE_END_OF_LIST()
1379 }
1380 };
1381
1382 static void rtl8139_ChipCmd_write(RTL8139State *s, uint32_t val)
1383 {
1384 val &= 0xff;
1385
1386 DPRINTF("ChipCmd write val=0x%08x\n", val);
1387
1388 if (val & CmdReset)
1389 {
1390 DPRINTF("ChipCmd reset\n");
1391 rtl8139_reset(&s->dev.qdev);
1392 }
1393 if (val & CmdRxEnb)
1394 {
1395 DPRINTF("ChipCmd enable receiver\n");
1396
1397 s->currCPlusRxDesc = 0;
1398 }
1399 if (val & CmdTxEnb)
1400 {
1401 DPRINTF("ChipCmd enable transmitter\n");
1402
1403 s->currCPlusTxDesc = 0;
1404 }
1405
1406 /* mask unwritable bits */
1407 val = SET_MASKED(val, 0xe3, s->bChipCmdState);
1408
1409 /* Deassert reset pin before next read */
1410 val &= ~CmdReset;
1411
1412 s->bChipCmdState = val;
1413 }
1414
1415 static int rtl8139_RxBufferEmpty(RTL8139State *s)
1416 {
1417 int unread = MOD2(s->RxBufferSize + s->RxBufAddr - s->RxBufPtr, s->RxBufferSize);
1418
1419 if (unread != 0)
1420 {
1421 DPRINTF("receiver buffer data available 0x%04x\n", unread);
1422 return 0;
1423 }
1424
1425 DPRINTF("receiver buffer is empty\n");
1426
1427 return 1;
1428 }
1429
1430 static uint32_t rtl8139_ChipCmd_read(RTL8139State *s)
1431 {
1432 uint32_t ret = s->bChipCmdState;
1433
1434 if (rtl8139_RxBufferEmpty(s))
1435 ret |= RxBufEmpty;
1436
1437 DPRINTF("ChipCmd read val=0x%04x\n", ret);
1438
1439 return ret;
1440 }
1441
1442 static void rtl8139_CpCmd_write(RTL8139State *s, uint32_t val)
1443 {
1444 val &= 0xffff;
1445
1446 DPRINTF("C+ command register write(w) val=0x%04x\n", val);
1447
1448 s->cplus_enabled = 1;
1449
1450 /* mask unwritable bits */
1451 val = SET_MASKED(val, 0xff84, s->CpCmd);
1452
1453 s->CpCmd = val;
1454 }
1455
1456 static uint32_t rtl8139_CpCmd_read(RTL8139State *s)
1457 {
1458 uint32_t ret = s->CpCmd;
1459
1460 DPRINTF("C+ command register read(w) val=0x%04x\n", ret);
1461
1462 return ret;
1463 }
1464
1465 static void rtl8139_IntrMitigate_write(RTL8139State *s, uint32_t val)
1466 {
1467 DPRINTF("C+ IntrMitigate register write(w) val=0x%04x\n", val);
1468 }
1469
1470 static uint32_t rtl8139_IntrMitigate_read(RTL8139State *s)
1471 {
1472 uint32_t ret = 0;
1473
1474 DPRINTF("C+ IntrMitigate register read(w) val=0x%04x\n", ret);
1475
1476 return ret;
1477 }
1478
1479 static int rtl8139_config_writable(RTL8139State *s)
1480 {
1481 if (s->Cfg9346 & Cfg9346_Unlock)
1482 {
1483 return 1;
1484 }
1485
1486 DPRINTF("Configuration registers are write-protected\n");
1487
1488 return 0;
1489 }
1490
1491 static void rtl8139_BasicModeCtrl_write(RTL8139State *s, uint32_t val)
1492 {
1493 val &= 0xffff;
1494
1495 DPRINTF("BasicModeCtrl register write(w) val=0x%04x\n", val);
1496
1497 /* mask unwritable bits */
1498 uint32_t mask = 0x4cff;
1499
1500 if (1 || !rtl8139_config_writable(s))
1501 {
1502 /* Speed setting and autonegotiation enable bits are read-only */
1503 mask |= 0x3000;
1504 /* Duplex mode setting is read-only */
1505 mask |= 0x0100;
1506 }
1507
1508 val = SET_MASKED(val, mask, s->BasicModeCtrl);
1509
1510 s->BasicModeCtrl = val;
1511 }
1512
1513 static uint32_t rtl8139_BasicModeCtrl_read(RTL8139State *s)
1514 {
1515 uint32_t ret = s->BasicModeCtrl;
1516
1517 DPRINTF("BasicModeCtrl register read(w) val=0x%04x\n", ret);
1518
1519 return ret;
1520 }
1521
1522 static void rtl8139_BasicModeStatus_write(RTL8139State *s, uint32_t val)
1523 {
1524 val &= 0xffff;
1525
1526 DPRINTF("BasicModeStatus register write(w) val=0x%04x\n", val);
1527
1528 /* mask unwritable bits */
1529 val = SET_MASKED(val, 0xff3f, s->BasicModeStatus);
1530
1531 s->BasicModeStatus = val;
1532 }
1533
1534 static uint32_t rtl8139_BasicModeStatus_read(RTL8139State *s)
1535 {
1536 uint32_t ret = s->BasicModeStatus;
1537
1538 DPRINTF("BasicModeStatus register read(w) val=0x%04x\n", ret);
1539
1540 return ret;
1541 }
1542
1543 static void rtl8139_Cfg9346_write(RTL8139State *s, uint32_t val)
1544 {
1545 val &= 0xff;
1546
1547 DPRINTF("Cfg9346 write val=0x%02x\n", val);
1548
1549 /* mask unwritable bits */
1550 val = SET_MASKED(val, 0x31, s->Cfg9346);
1551
1552 uint32_t opmode = val & 0xc0;
1553 uint32_t eeprom_val = val & 0xf;
1554
1555 if (opmode == 0x80) {
1556 /* eeprom access */
1557 int eecs = (eeprom_val & 0x08)?1:0;
1558 int eesk = (eeprom_val & 0x04)?1:0;
1559 int eedi = (eeprom_val & 0x02)?1:0;
1560 prom9346_set_wire(s, eecs, eesk, eedi);
1561 } else if (opmode == 0x40) {
1562 /* Reset. */
1563 val = 0;
1564 rtl8139_reset(&s->dev.qdev);
1565 }
1566
1567 s->Cfg9346 = val;
1568 }
1569
1570 static uint32_t rtl8139_Cfg9346_read(RTL8139State *s)
1571 {
1572 uint32_t ret = s->Cfg9346;
1573
1574 uint32_t opmode = ret & 0xc0;
1575
1576 if (opmode == 0x80)
1577 {
1578 /* eeprom access */
1579 int eedo = prom9346_get_wire(s);
1580 if (eedo)
1581 {
1582 ret |= 0x01;
1583 }
1584 else
1585 {
1586 ret &= ~0x01;
1587 }
1588 }
1589
1590 DPRINTF("Cfg9346 read val=0x%02x\n", ret);
1591
1592 return ret;
1593 }
1594
1595 static void rtl8139_Config0_write(RTL8139State *s, uint32_t val)
1596 {
1597 val &= 0xff;
1598
1599 DPRINTF("Config0 write val=0x%02x\n", val);
1600
1601 if (!rtl8139_config_writable(s)) {
1602 return;
1603 }
1604
1605 /* mask unwritable bits */
1606 val = SET_MASKED(val, 0xf8, s->Config0);
1607
1608 s->Config0 = val;
1609 }
1610
1611 static uint32_t rtl8139_Config0_read(RTL8139State *s)
1612 {
1613 uint32_t ret = s->Config0;
1614
1615 DPRINTF("Config0 read val=0x%02x\n", ret);
1616
1617 return ret;
1618 }
1619
1620 static void rtl8139_Config1_write(RTL8139State *s, uint32_t val)
1621 {
1622 val &= 0xff;
1623
1624 DPRINTF("Config1 write val=0x%02x\n", val);
1625
1626 if (!rtl8139_config_writable(s)) {
1627 return;
1628 }
1629
1630 /* mask unwritable bits */
1631 val = SET_MASKED(val, 0xC, s->Config1);
1632
1633 s->Config1 = val;
1634 }
1635
1636 static uint32_t rtl8139_Config1_read(RTL8139State *s)
1637 {
1638 uint32_t ret = s->Config1;
1639
1640 DPRINTF("Config1 read val=0x%02x\n", ret);
1641
1642 return ret;
1643 }
1644
1645 static void rtl8139_Config3_write(RTL8139State *s, uint32_t val)
1646 {
1647 val &= 0xff;
1648
1649 DPRINTF("Config3 write val=0x%02x\n", val);
1650
1651 if (!rtl8139_config_writable(s)) {
1652 return;
1653 }
1654
1655 /* mask unwritable bits */
1656 val = SET_MASKED(val, 0x8F, s->Config3);
1657
1658 s->Config3 = val;
1659 }
1660
1661 static uint32_t rtl8139_Config3_read(RTL8139State *s)
1662 {
1663 uint32_t ret = s->Config3;
1664
1665 DPRINTF("Config3 read val=0x%02x\n", ret);
1666
1667 return ret;
1668 }
1669
1670 static void rtl8139_Config4_write(RTL8139State *s, uint32_t val)
1671 {
1672 val &= 0xff;
1673
1674 DPRINTF("Config4 write val=0x%02x\n", val);
1675
1676 if (!rtl8139_config_writable(s)) {
1677 return;
1678 }
1679
1680 /* mask unwritable bits */
1681 val = SET_MASKED(val, 0x0a, s->Config4);
1682
1683 s->Config4 = val;
1684 }
1685
1686 static uint32_t rtl8139_Config4_read(RTL8139State *s)
1687 {
1688 uint32_t ret = s->Config4;
1689
1690 DPRINTF("Config4 read val=0x%02x\n", ret);
1691
1692 return ret;
1693 }
1694
1695 static void rtl8139_Config5_write(RTL8139State *s, uint32_t val)
1696 {
1697 val &= 0xff;
1698
1699 DPRINTF("Config5 write val=0x%02x\n", val);
1700
1701 /* mask unwritable bits */
1702 val = SET_MASKED(val, 0x80, s->Config5);
1703
1704 s->Config5 = val;
1705 }
1706
1707 static uint32_t rtl8139_Config5_read(RTL8139State *s)
1708 {
1709 uint32_t ret = s->Config5;
1710
1711 DPRINTF("Config5 read val=0x%02x\n", ret);
1712
1713 return ret;
1714 }
1715
1716 static void rtl8139_TxConfig_write(RTL8139State *s, uint32_t val)
1717 {
1718 if (!rtl8139_transmitter_enabled(s))
1719 {
1720 DPRINTF("transmitter disabled; no TxConfig write val=0x%08x\n", val);
1721 return;
1722 }
1723
1724 DPRINTF("TxConfig write val=0x%08x\n", val);
1725
1726 val = SET_MASKED(val, TxVersionMask | 0x8070f80f, s->TxConfig);
1727
1728 s->TxConfig = val;
1729 }
1730
1731 static void rtl8139_TxConfig_writeb(RTL8139State *s, uint32_t val)
1732 {
1733 DPRINTF("RTL8139C TxConfig via write(b) val=0x%02x\n", val);
1734
1735 uint32_t tc = s->TxConfig;
1736 tc &= 0xFFFFFF00;
1737 tc |= (val & 0x000000FF);
1738 rtl8139_TxConfig_write(s, tc);
1739 }
1740
1741 static uint32_t rtl8139_TxConfig_read(RTL8139State *s)
1742 {
1743 uint32_t ret = s->TxConfig;
1744
1745 DPRINTF("TxConfig read val=0x%04x\n", ret);
1746
1747 return ret;
1748 }
1749
1750 static void rtl8139_RxConfig_write(RTL8139State *s, uint32_t val)
1751 {
1752 DPRINTF("RxConfig write val=0x%08x\n", val);
1753
1754 /* mask unwritable bits */
1755 val = SET_MASKED(val, 0xf0fc0040, s->RxConfig);
1756
1757 s->RxConfig = val;
1758
1759 /* reset buffer size and read/write pointers */
1760 rtl8139_reset_rxring(s, 8192 << ((s->RxConfig >> 11) & 0x3));
1761
1762 DPRINTF("RxConfig write reset buffer size to %d\n", s->RxBufferSize);
1763 }
1764
1765 static uint32_t rtl8139_RxConfig_read(RTL8139State *s)
1766 {
1767 uint32_t ret = s->RxConfig;
1768
1769 DPRINTF("RxConfig read val=0x%08x\n", ret);
1770
1771 return ret;
1772 }
1773
1774 static void rtl8139_transfer_frame(RTL8139State *s, uint8_t *buf, int size,
1775 int do_interrupt, const uint8_t *dot1q_buf)
1776 {
1777 struct iovec *iov = NULL;
1778
1779 if (!size)
1780 {
1781 DPRINTF("+++ empty ethernet frame\n");
1782 return;
1783 }
1784
1785 if (dot1q_buf && size >= ETHER_ADDR_LEN * 2) {
1786 iov = (struct iovec[3]) {
1787 { .iov_base = buf, .iov_len = ETHER_ADDR_LEN * 2 },
1788 { .iov_base = (void *) dot1q_buf, .iov_len = VLAN_HLEN },
1789 { .iov_base = buf + ETHER_ADDR_LEN * 2,
1790 .iov_len = size - ETHER_ADDR_LEN * 2 },
1791 };
1792 }
1793
1794 if (TxLoopBack == (s->TxConfig & TxLoopBack))
1795 {
1796 size_t buf2_size;
1797 uint8_t *buf2;
1798
1799 if (iov) {
1800 buf2_size = iov_size(iov, 3);
1801 buf2 = g_malloc(buf2_size);
1802 iov_to_buf(iov, 3, buf2, 0, buf2_size);
1803 buf = buf2;
1804 }
1805
1806 DPRINTF("+++ transmit loopback mode\n");
1807 rtl8139_do_receive(&s->nic->nc, buf, size, do_interrupt);
1808
1809 if (iov) {
1810 g_free(buf2);
1811 }
1812 }
1813 else
1814 {
1815 if (iov) {
1816 qemu_sendv_packet(&s->nic->nc, iov, 3);
1817 } else {
1818 qemu_send_packet(&s->nic->nc, buf, size);
1819 }
1820 }
1821 }
1822
1823 static int rtl8139_transmit_one(RTL8139State *s, int descriptor)
1824 {
1825 if (!rtl8139_transmitter_enabled(s))
1826 {
1827 DPRINTF("+++ cannot transmit from descriptor %d: transmitter "
1828 "disabled\n", descriptor);
1829 return 0;
1830 }
1831
1832 if (s->TxStatus[descriptor] & TxHostOwns)
1833 {
1834 DPRINTF("+++ cannot transmit from descriptor %d: owned by host "
1835 "(%08x)\n", descriptor, s->TxStatus[descriptor]);
1836 return 0;
1837 }
1838
1839 DPRINTF("+++ transmitting from descriptor %d\n", descriptor);
1840
1841 int txsize = s->TxStatus[descriptor] & 0x1fff;
1842 uint8_t txbuffer[0x2000];
1843
1844 DPRINTF("+++ transmit reading %d bytes from host memory at 0x%08x\n",
1845 txsize, s->TxAddr[descriptor]);
1846
1847 pci_dma_read(&s->dev, s->TxAddr[descriptor], txbuffer, txsize);
1848
1849 /* Mark descriptor as transferred */
1850 s->TxStatus[descriptor] |= TxHostOwns;
1851 s->TxStatus[descriptor] |= TxStatOK;
1852
1853 rtl8139_transfer_frame(s, txbuffer, txsize, 0, NULL);
1854
1855 DPRINTF("+++ transmitted %d bytes from descriptor %d\n", txsize,
1856 descriptor);
1857
1858 /* update interrupt */
1859 s->IntrStatus |= TxOK;
1860 rtl8139_update_irq(s);
1861
1862 return 1;
1863 }
1864
1865 /* structures and macros for task offloading */
1866 typedef struct ip_header
1867 {
1868 uint8_t ip_ver_len; /* version and header length */
1869 uint8_t ip_tos; /* type of service */
1870 uint16_t ip_len; /* total length */
1871 uint16_t ip_id; /* identification */
1872 uint16_t ip_off; /* fragment offset field */
1873 uint8_t ip_ttl; /* time to live */
1874 uint8_t ip_p; /* protocol */
1875 uint16_t ip_sum; /* checksum */
1876 uint32_t ip_src,ip_dst; /* source and dest address */
1877 } ip_header;
1878
1879 #define IP_HEADER_VERSION_4 4
1880 #define IP_HEADER_VERSION(ip) ((ip->ip_ver_len >> 4)&0xf)
1881 #define IP_HEADER_LENGTH(ip) (((ip->ip_ver_len)&0xf) << 2)
1882
1883 typedef struct tcp_header
1884 {
1885 uint16_t th_sport; /* source port */
1886 uint16_t th_dport; /* destination port */
1887 uint32_t th_seq; /* sequence number */
1888 uint32_t th_ack; /* acknowledgement number */
1889 uint16_t th_offset_flags; /* data offset, reserved 6 bits, TCP protocol flags */
1890 uint16_t th_win; /* window */
1891 uint16_t th_sum; /* checksum */
1892 uint16_t th_urp; /* urgent pointer */
1893 } tcp_header;
1894
1895 typedef struct udp_header
1896 {
1897 uint16_t uh_sport; /* source port */
1898 uint16_t uh_dport; /* destination port */
1899 uint16_t uh_ulen; /* udp length */
1900 uint16_t uh_sum; /* udp checksum */
1901 } udp_header;
1902
1903 typedef struct ip_pseudo_header
1904 {
1905 uint32_t ip_src;
1906 uint32_t ip_dst;
1907 uint8_t zeros;
1908 uint8_t ip_proto;
1909 uint16_t ip_payload;
1910 } ip_pseudo_header;
1911
1912 #define IP_PROTO_TCP 6
1913 #define IP_PROTO_UDP 17
1914
1915 #define TCP_HEADER_DATA_OFFSET(tcp) (((be16_to_cpu(tcp->th_offset_flags) >> 12)&0xf) << 2)
1916 #define TCP_FLAGS_ONLY(flags) ((flags)&0x3f)
1917 #define TCP_HEADER_FLAGS(tcp) TCP_FLAGS_ONLY(be16_to_cpu(tcp->th_offset_flags))
1918
1919 #define TCP_HEADER_CLEAR_FLAGS(tcp, off) ((tcp)->th_offset_flags &= cpu_to_be16(~TCP_FLAGS_ONLY(off)))
1920
1921 #define TCP_FLAG_FIN 0x01
1922 #define TCP_FLAG_PUSH 0x08
1923
1924 /* produces ones' complement sum of data */
1925 static uint16_t ones_complement_sum(uint8_t *data, size_t len)
1926 {
1927 uint32_t result = 0;
1928
1929 for (; len > 1; data+=2, len-=2)
1930 {
1931 result += *(uint16_t*)data;
1932 }
1933
1934 /* add the remainder byte */
1935 if (len)
1936 {
1937 uint8_t odd[2] = {*data, 0};
1938 result += *(uint16_t*)odd;
1939 }
1940
1941 while (result>>16)
1942 result = (result & 0xffff) + (result >> 16);
1943
1944 return result;
1945 }
1946
1947 static uint16_t ip_checksum(void *data, size_t len)
1948 {
1949 return ~ones_complement_sum((uint8_t*)data, len);
1950 }
1951
1952 static int rtl8139_cplus_transmit_one(RTL8139State *s)
1953 {
1954 if (!rtl8139_transmitter_enabled(s))
1955 {
1956 DPRINTF("+++ C+ mode: transmitter disabled\n");
1957 return 0;
1958 }
1959
1960 if (!rtl8139_cp_transmitter_enabled(s))
1961 {
1962 DPRINTF("+++ C+ mode: C+ transmitter disabled\n");
1963 return 0 ;
1964 }
1965
1966 int descriptor = s->currCPlusTxDesc;
1967
1968 dma_addr_t cplus_tx_ring_desc = rtl8139_addr64(s->TxAddr[0], s->TxAddr[1]);
1969
1970 /* Normal priority ring */
1971 cplus_tx_ring_desc += 16 * descriptor;
1972
1973 DPRINTF("+++ C+ mode reading TX descriptor %d from host memory at "
1974 "%08x %08x = 0x"DMA_ADDR_FMT"\n", descriptor, s->TxAddr[1],
1975 s->TxAddr[0], cplus_tx_ring_desc);
1976
1977 uint32_t val, txdw0,txdw1,txbufLO,txbufHI;
1978
1979 pci_dma_read(&s->dev, cplus_tx_ring_desc, (uint8_t *)&val, 4);
1980 txdw0 = le32_to_cpu(val);
1981 pci_dma_read(&s->dev, cplus_tx_ring_desc+4, (uint8_t *)&val, 4);
1982 txdw1 = le32_to_cpu(val);
1983 pci_dma_read(&s->dev, cplus_tx_ring_desc+8, (uint8_t *)&val, 4);
1984 txbufLO = le32_to_cpu(val);
1985 pci_dma_read(&s->dev, cplus_tx_ring_desc+12, (uint8_t *)&val, 4);
1986 txbufHI = le32_to_cpu(val);
1987
1988 DPRINTF("+++ C+ mode TX descriptor %d %08x %08x %08x %08x\n", descriptor,
1989 txdw0, txdw1, txbufLO, txbufHI);
1990
1991 /* w0 ownership flag */
1992 #define CP_TX_OWN (1<<31)
1993 /* w0 end of ring flag */
1994 #define CP_TX_EOR (1<<30)
1995 /* first segment of received packet flag */
1996 #define CP_TX_FS (1<<29)
1997 /* last segment of received packet flag */
1998 #define CP_TX_LS (1<<28)
1999 /* large send packet flag */
2000 #define CP_TX_LGSEN (1<<27)
2001 /* large send MSS mask, bits 16...25 */
2002 #define CP_TC_LGSEN_MSS_MASK ((1 << 12) - 1)
2003
2004 /* IP checksum offload flag */
2005 #define CP_TX_IPCS (1<<18)
2006 /* UDP checksum offload flag */
2007 #define CP_TX_UDPCS (1<<17)
2008 /* TCP checksum offload flag */
2009 #define CP_TX_TCPCS (1<<16)
2010
2011 /* w0 bits 0...15 : buffer size */
2012 #define CP_TX_BUFFER_SIZE (1<<16)
2013 #define CP_TX_BUFFER_SIZE_MASK (CP_TX_BUFFER_SIZE - 1)
2014 /* w1 add tag flag */
2015 #define CP_TX_TAGC (1<<17)
2016 /* w1 bits 0...15 : VLAN tag (big endian) */
2017 #define CP_TX_VLAN_TAG_MASK ((1<<16) - 1)
2018 /* w2 low 32bit of Rx buffer ptr */
2019 /* w3 high 32bit of Rx buffer ptr */
2020
2021 /* set after transmission */
2022 /* FIFO underrun flag */
2023 #define CP_TX_STATUS_UNF (1<<25)
2024 /* transmit error summary flag, valid if set any of three below */
2025 #define CP_TX_STATUS_TES (1<<23)
2026 /* out-of-window collision flag */
2027 #define CP_TX_STATUS_OWC (1<<22)
2028 /* link failure flag */
2029 #define CP_TX_STATUS_LNKF (1<<21)
2030 /* excessive collisions flag */
2031 #define CP_TX_STATUS_EXC (1<<20)
2032
2033 if (!(txdw0 & CP_TX_OWN))
2034 {
2035 DPRINTF("C+ Tx mode : descriptor %d is owned by host\n", descriptor);
2036 return 0 ;
2037 }
2038
2039 DPRINTF("+++ C+ Tx mode : transmitting from descriptor %d\n", descriptor);
2040
2041 if (txdw0 & CP_TX_FS)
2042 {
2043 DPRINTF("+++ C+ Tx mode : descriptor %d is first segment "
2044 "descriptor\n", descriptor);
2045
2046 /* reset internal buffer offset */
2047 s->cplus_txbuffer_offset = 0;
2048 }
2049
2050 int txsize = txdw0 & CP_TX_BUFFER_SIZE_MASK;
2051 dma_addr_t tx_addr = rtl8139_addr64(txbufLO, txbufHI);
2052
2053 /* make sure we have enough space to assemble the packet */
2054 if (!s->cplus_txbuffer)
2055 {
2056 s->cplus_txbuffer_len = CP_TX_BUFFER_SIZE;
2057 s->cplus_txbuffer = g_malloc(s->cplus_txbuffer_len);
2058 s->cplus_txbuffer_offset = 0;
2059
2060 DPRINTF("+++ C+ mode transmission buffer allocated space %d\n",
2061 s->cplus_txbuffer_len);
2062 }
2063
2064 while (s->cplus_txbuffer && s->cplus_txbuffer_offset + txsize >= s->cplus_txbuffer_len)
2065 {
2066 s->cplus_txbuffer_len += CP_TX_BUFFER_SIZE;
2067 s->cplus_txbuffer = g_realloc(s->cplus_txbuffer, s->cplus_txbuffer_len);
2068
2069 DPRINTF("+++ C+ mode transmission buffer space changed to %d\n",
2070 s->cplus_txbuffer_len);
2071 }
2072
2073 if (!s->cplus_txbuffer)
2074 {
2075 /* out of memory */
2076
2077 DPRINTF("+++ C+ mode transmiter failed to reallocate %d bytes\n",
2078 s->cplus_txbuffer_len);
2079
2080 /* update tally counter */
2081 ++s->tally_counters.TxERR;
2082 ++s->tally_counters.TxAbt;
2083
2084 return 0;
2085 }
2086
2087 /* append more data to the packet */
2088
2089 DPRINTF("+++ C+ mode transmit reading %d bytes from host memory at "
2090 DMA_ADDR_FMT" to offset %d\n", txsize, tx_addr,
2091 s->cplus_txbuffer_offset);
2092
2093 pci_dma_read(&s->dev, tx_addr,
2094 s->cplus_txbuffer + s->cplus_txbuffer_offset, txsize);
2095 s->cplus_txbuffer_offset += txsize;
2096
2097 /* seek to next Rx descriptor */
2098 if (txdw0 & CP_TX_EOR)
2099 {
2100 s->currCPlusTxDesc = 0;
2101 }
2102 else
2103 {
2104 ++s->currCPlusTxDesc;
2105 if (s->currCPlusTxDesc >= 64)
2106 s->currCPlusTxDesc = 0;
2107 }
2108
2109 /* transfer ownership to target */
2110 txdw0 &= ~CP_RX_OWN;
2111
2112 /* reset error indicator bits */
2113 txdw0 &= ~CP_TX_STATUS_UNF;
2114 txdw0 &= ~CP_TX_STATUS_TES;
2115 txdw0 &= ~CP_TX_STATUS_OWC;
2116 txdw0 &= ~CP_TX_STATUS_LNKF;
2117 txdw0 &= ~CP_TX_STATUS_EXC;
2118
2119 /* update ring data */
2120 val = cpu_to_le32(txdw0);
2121 pci_dma_write(&s->dev, cplus_tx_ring_desc, (uint8_t *)&val, 4);
2122
2123 /* Now decide if descriptor being processed is holding the last segment of packet */
2124 if (txdw0 & CP_TX_LS)
2125 {
2126 uint8_t dot1q_buffer_space[VLAN_HLEN];
2127 uint16_t *dot1q_buffer;
2128
2129 DPRINTF("+++ C+ Tx mode : descriptor %d is last segment descriptor\n",
2130 descriptor);
2131
2132 /* can transfer fully assembled packet */
2133
2134 uint8_t *saved_buffer = s->cplus_txbuffer;
2135 int saved_size = s->cplus_txbuffer_offset;
2136 int saved_buffer_len = s->cplus_txbuffer_len;
2137
2138 /* create vlan tag */
2139 if (txdw1 & CP_TX_TAGC) {
2140 /* the vlan tag is in BE byte order in the descriptor
2141 * BE + le_to_cpu() + ~swap()~ = cpu */
2142 DPRINTF("+++ C+ Tx mode : inserting vlan tag with ""tci: %u\n",
2143 bswap16(txdw1 & CP_TX_VLAN_TAG_MASK));
2144
2145 dot1q_buffer = (uint16_t *) dot1q_buffer_space;
2146 dot1q_buffer[0] = cpu_to_be16(ETH_P_8021Q);
2147 /* BE + le_to_cpu() + ~cpu_to_le()~ = BE */
2148 dot1q_buffer[1] = cpu_to_le16(txdw1 & CP_TX_VLAN_TAG_MASK);
2149 } else {
2150 dot1q_buffer = NULL;
2151 }
2152
2153 /* reset the card space to protect from recursive call */
2154 s->cplus_txbuffer = NULL;
2155 s->cplus_txbuffer_offset = 0;
2156 s->cplus_txbuffer_len = 0;
2157
2158 if (txdw0 & (CP_TX_IPCS | CP_TX_UDPCS | CP_TX_TCPCS | CP_TX_LGSEN))
2159 {
2160 DPRINTF("+++ C+ mode offloaded task checksum\n");
2161
2162 /* ip packet header */
2163 ip_header *ip = NULL;
2164 int hlen = 0;
2165 uint8_t ip_protocol = 0;
2166 uint16_t ip_data_len = 0;
2167
2168 uint8_t *eth_payload_data = NULL;
2169 size_t eth_payload_len = 0;
2170
2171 int proto = be16_to_cpu(*(uint16_t *)(saved_buffer + 12));
2172 if (proto == ETH_P_IP)
2173 {
2174 DPRINTF("+++ C+ mode has IP packet\n");
2175
2176 /* not aligned */
2177 eth_payload_data = saved_buffer + ETH_HLEN;
2178 eth_payload_len = saved_size - ETH_HLEN;
2179
2180 ip = (ip_header*)eth_payload_data;
2181
2182 if (IP_HEADER_VERSION(ip) != IP_HEADER_VERSION_4) {
2183 DPRINTF("+++ C+ mode packet has bad IP version %d "
2184 "expected %d\n", IP_HEADER_VERSION(ip),
2185 IP_HEADER_VERSION_4);
2186 ip = NULL;
2187 } else {
2188 hlen = IP_HEADER_LENGTH(ip);
2189 ip_protocol = ip->ip_p;
2190 ip_data_len = be16_to_cpu(ip->ip_len) - hlen;
2191 }
2192 }
2193
2194 if (ip)
2195 {
2196 if (txdw0 & CP_TX_IPCS)
2197 {
2198 DPRINTF("+++ C+ mode need IP checksum\n");
2199
2200 if (hlen<sizeof(ip_header) || hlen>eth_payload_len) {/* min header length */
2201 /* bad packet header len */
2202 /* or packet too short */
2203 }
2204 else
2205 {
2206 ip->ip_sum = 0;
2207 ip->ip_sum = ip_checksum(ip, hlen);
2208 DPRINTF("+++ C+ mode IP header len=%d checksum=%04x\n",
2209 hlen, ip->ip_sum);
2210 }
2211 }
2212
2213 if ((txdw0 & CP_TX_LGSEN) && ip_protocol == IP_PROTO_TCP)
2214 {
2215 int large_send_mss = (txdw0 >> 16) & CP_TC_LGSEN_MSS_MASK;
2216
2217 DPRINTF("+++ C+ mode offloaded task TSO MTU=%d IP data %d "
2218 "frame data %d specified MSS=%d\n", ETH_MTU,
2219 ip_data_len, saved_size - ETH_HLEN, large_send_mss);
2220
2221 int tcp_send_offset = 0;
2222 int send_count = 0;
2223
2224 /* maximum IP header length is 60 bytes */
2225 uint8_t saved_ip_header[60];
2226
2227 /* save IP header template; data area is used in tcp checksum calculation */
2228 memcpy(saved_ip_header, eth_payload_data, hlen);
2229
2230 /* a placeholder for checksum calculation routine in tcp case */
2231 uint8_t *data_to_checksum = eth_payload_data + hlen - 12;
2232 // size_t data_to_checksum_len = eth_payload_len - hlen + 12;
2233
2234 /* pointer to TCP header */
2235 tcp_header *p_tcp_hdr = (tcp_header*)(eth_payload_data + hlen);
2236
2237 int tcp_hlen = TCP_HEADER_DATA_OFFSET(p_tcp_hdr);
2238
2239 /* ETH_MTU = ip header len + tcp header len + payload */
2240 int tcp_data_len = ip_data_len - tcp_hlen;
2241 int tcp_chunk_size = ETH_MTU - hlen - tcp_hlen;
2242
2243 DPRINTF("+++ C+ mode TSO IP data len %d TCP hlen %d TCP "
2244 "data len %d TCP chunk size %d\n", ip_data_len,
2245 tcp_hlen, tcp_data_len, tcp_chunk_size);
2246
2247 /* note the cycle below overwrites IP header data,
2248 but restores it from saved_ip_header before sending packet */
2249
2250 int is_last_frame = 0;
2251
2252 for (tcp_send_offset = 0; tcp_send_offset < tcp_data_len; tcp_send_offset += tcp_chunk_size)
2253 {
2254 uint16_t chunk_size = tcp_chunk_size;
2255
2256 /* check if this is the last frame */
2257 if (tcp_send_offset + tcp_chunk_size >= tcp_data_len)
2258 {
2259 is_last_frame = 1;
2260 chunk_size = tcp_data_len - tcp_send_offset;
2261 }
2262
2263 DPRINTF("+++ C+ mode TSO TCP seqno %08x\n",
2264 be32_to_cpu(p_tcp_hdr->th_seq));
2265
2266 /* add 4 TCP pseudoheader fields */
2267 /* copy IP source and destination fields */
2268 memcpy(data_to_checksum, saved_ip_header + 12, 8);
2269
2270 DPRINTF("+++ C+ mode TSO calculating TCP checksum for "
2271 "packet with %d bytes data\n", tcp_hlen +
2272 chunk_size);
2273
2274 if (tcp_send_offset)
2275 {
2276 memcpy((uint8_t*)p_tcp_hdr + tcp_hlen, (uint8_t*)p_tcp_hdr + tcp_hlen + tcp_send_offset, chunk_size);
2277 }
2278
2279 /* keep PUSH and FIN flags only for the last frame */
2280 if (!is_last_frame)
2281 {
2282 TCP_HEADER_CLEAR_FLAGS(p_tcp_hdr, TCP_FLAG_PUSH|TCP_FLAG_FIN);
2283 }
2284
2285 /* recalculate TCP checksum */
2286 ip_pseudo_header *p_tcpip_hdr = (ip_pseudo_header *)data_to_checksum;
2287 p_tcpip_hdr->zeros = 0;
2288 p_tcpip_hdr->ip_proto = IP_PROTO_TCP;
2289 p_tcpip_hdr->ip_payload = cpu_to_be16(tcp_hlen + chunk_size);
2290
2291 p_tcp_hdr->th_sum = 0;
2292
2293 int tcp_checksum = ip_checksum(data_to_checksum, tcp_hlen + chunk_size + 12);
2294 DPRINTF("+++ C+ mode TSO TCP checksum %04x\n",
2295 tcp_checksum);
2296
2297 p_tcp_hdr->th_sum = tcp_checksum;
2298
2299 /* restore IP header */
2300 memcpy(eth_payload_data, saved_ip_header, hlen);
2301
2302 /* set IP data length and recalculate IP checksum */
2303 ip->ip_len = cpu_to_be16(hlen + tcp_hlen + chunk_size);
2304
2305 /* increment IP id for subsequent frames */
2306 ip->ip_id = cpu_to_be16(tcp_send_offset/tcp_chunk_size + be16_to_cpu(ip->ip_id));
2307
2308 ip->ip_sum = 0;
2309 ip->ip_sum = ip_checksum(eth_payload_data, hlen);
2310 DPRINTF("+++ C+ mode TSO IP header len=%d "
2311 "checksum=%04x\n", hlen, ip->ip_sum);
2312
2313 int tso_send_size = ETH_HLEN + hlen + tcp_hlen + chunk_size;
2314 DPRINTF("+++ C+ mode TSO transferring packet size "
2315 "%d\n", tso_send_size);
2316 rtl8139_transfer_frame(s, saved_buffer, tso_send_size,
2317 0, (uint8_t *) dot1q_buffer);
2318
2319 /* add transferred count to TCP sequence number */
2320 p_tcp_hdr->th_seq = cpu_to_be32(chunk_size + be32_to_cpu(p_tcp_hdr->th_seq));
2321 ++send_count;
2322 }
2323
2324 /* Stop sending this frame */
2325 saved_size = 0;
2326 }
2327 else if (txdw0 & (CP_TX_TCPCS|CP_TX_UDPCS))
2328 {
2329 DPRINTF("+++ C+ mode need TCP or UDP checksum\n");
2330
2331 /* maximum IP header length is 60 bytes */
2332 uint8_t saved_ip_header[60];
2333 memcpy(saved_ip_header, eth_payload_data, hlen);
2334
2335 uint8_t *data_to_checksum = eth_payload_data + hlen - 12;
2336 // size_t data_to_checksum_len = eth_payload_len - hlen + 12;
2337
2338 /* add 4 TCP pseudoheader fields */
2339 /* copy IP source and destination fields */
2340 memcpy(data_to_checksum, saved_ip_header + 12, 8);
2341
2342 if ((txdw0 & CP_TX_TCPCS) && ip_protocol == IP_PROTO_TCP)
2343 {
2344 DPRINTF("+++ C+ mode calculating TCP checksum for "
2345 "packet with %d bytes data\n", ip_data_len);
2346
2347 ip_pseudo_header *p_tcpip_hdr = (ip_pseudo_header *)data_to_checksum;
2348 p_tcpip_hdr->zeros = 0;
2349 p_tcpip_hdr->ip_proto = IP_PROTO_TCP;
2350 p_tcpip_hdr->ip_payload = cpu_to_be16(ip_data_len);
2351
2352 tcp_header* p_tcp_hdr = (tcp_header *) (data_to_checksum+12);
2353
2354 p_tcp_hdr->th_sum = 0;
2355
2356 int tcp_checksum = ip_checksum(data_to_checksum, ip_data_len + 12);
2357 DPRINTF("+++ C+ mode TCP checksum %04x\n",
2358 tcp_checksum);
2359
2360 p_tcp_hdr->th_sum = tcp_checksum;
2361 }
2362 else if ((txdw0 & CP_TX_UDPCS) && ip_protocol == IP_PROTO_UDP)
2363 {
2364 DPRINTF("+++ C+ mode calculating UDP checksum for "
2365 "packet with %d bytes data\n", ip_data_len);
2366
2367 ip_pseudo_header *p_udpip_hdr = (ip_pseudo_header *)data_to_checksum;
2368 p_udpip_hdr->zeros = 0;
2369 p_udpip_hdr->ip_proto = IP_PROTO_UDP;
2370 p_udpip_hdr->ip_payload = cpu_to_be16(ip_data_len);
2371
2372 udp_header *p_udp_hdr = (udp_header *) (data_to_checksum+12);
2373
2374 p_udp_hdr->uh_sum = 0;
2375
2376 int udp_checksum = ip_checksum(data_to_checksum, ip_data_len + 12);
2377 DPRINTF("+++ C+ mode UDP checksum %04x\n",
2378 udp_checksum);
2379
2380 p_udp_hdr->uh_sum = udp_checksum;
2381 }
2382
2383 /* restore IP header */
2384 memcpy(eth_payload_data, saved_ip_header, hlen);
2385 }
2386 }
2387 }
2388
2389 /* update tally counter */
2390 ++s->tally_counters.TxOk;
2391
2392 DPRINTF("+++ C+ mode transmitting %d bytes packet\n", saved_size);
2393
2394 rtl8139_transfer_frame(s, saved_buffer, saved_size, 1,
2395 (uint8_t *) dot1q_buffer);
2396
2397 /* restore card space if there was no recursion and reset offset */
2398 if (!s->cplus_txbuffer)
2399 {
2400 s->cplus_txbuffer = saved_buffer;
2401 s->cplus_txbuffer_len = saved_buffer_len;
2402 s->cplus_txbuffer_offset = 0;
2403 }
2404 else
2405 {
2406 g_free(saved_buffer);
2407 }
2408 }
2409 else
2410 {
2411 DPRINTF("+++ C+ mode transmission continue to next descriptor\n");
2412 }
2413
2414 return 1;
2415 }
2416
2417 static void rtl8139_cplus_transmit(RTL8139State *s)
2418 {
2419 int txcount = 0;
2420
2421 while (rtl8139_cplus_transmit_one(s))
2422 {
2423 ++txcount;
2424 }
2425
2426 /* Mark transfer completed */
2427 if (!txcount)
2428 {
2429 DPRINTF("C+ mode : transmitter queue stalled, current TxDesc = %d\n",
2430 s->currCPlusTxDesc);
2431 }
2432 else
2433 {
2434 /* update interrupt status */
2435 s->IntrStatus |= TxOK;
2436 rtl8139_update_irq(s);
2437 }
2438 }
2439
2440 static void rtl8139_transmit(RTL8139State *s)
2441 {
2442 int descriptor = s->currTxDesc, txcount = 0;
2443
2444 /*while*/
2445 if (rtl8139_transmit_one(s, descriptor))
2446 {
2447 ++s->currTxDesc;
2448 s->currTxDesc %= 4;
2449 ++txcount;
2450 }
2451
2452 /* Mark transfer completed */
2453 if (!txcount)
2454 {
2455 DPRINTF("transmitter queue stalled, current TxDesc = %d\n",
2456 s->currTxDesc);
2457 }
2458 }
2459
2460 static void rtl8139_TxStatus_write(RTL8139State *s, uint32_t txRegOffset, uint32_t val)
2461 {
2462
2463 int descriptor = txRegOffset/4;
2464
2465 /* handle C+ transmit mode register configuration */
2466
2467 if (s->cplus_enabled)
2468 {
2469 DPRINTF("RTL8139C+ DTCCR write offset=0x%x val=0x%08x "
2470 "descriptor=%d\n", txRegOffset, val, descriptor);
2471
2472 /* handle Dump Tally Counters command */
2473 s->TxStatus[descriptor] = val;
2474
2475 if (descriptor == 0 && (val & 0x8))
2476 {
2477 target_phys_addr_t tc_addr = rtl8139_addr64(s->TxStatus[0] & ~0x3f, s->TxStatus[1]);
2478
2479 /* dump tally counters to specified memory location */
2480 RTL8139TallyCounters_dma_write(s, tc_addr);
2481
2482 /* mark dump completed */
2483 s->TxStatus[0] &= ~0x8;
2484 }
2485
2486 return;
2487 }
2488
2489 DPRINTF("TxStatus write offset=0x%x val=0x%08x descriptor=%d\n",
2490 txRegOffset, val, descriptor);
2491
2492 /* mask only reserved bits */
2493 val &= ~0xff00c000; /* these bits are reset on write */
2494 val = SET_MASKED(val, 0x00c00000, s->TxStatus[descriptor]);
2495
2496 s->TxStatus[descriptor] = val;
2497
2498 /* attempt to start transmission */
2499 rtl8139_transmit(s);
2500 }
2501
2502 static uint32_t rtl8139_TxStatus_read(RTL8139State *s, uint32_t txRegOffset)
2503 {
2504 uint32_t ret = s->TxStatus[txRegOffset/4];
2505
2506 DPRINTF("TxStatus read offset=0x%x val=0x%08x\n", txRegOffset, ret);
2507
2508 return ret;
2509 }
2510
2511 static uint16_t rtl8139_TSAD_read(RTL8139State *s)
2512 {
2513 uint16_t ret = 0;
2514
2515 /* Simulate TSAD, it is read only anyway */
2516
2517 ret = ((s->TxStatus[3] & TxStatOK )?TSAD_TOK3:0)
2518 |((s->TxStatus[2] & TxStatOK )?TSAD_TOK2:0)
2519 |((s->TxStatus[1] & TxStatOK )?TSAD_TOK1:0)
2520 |((s->TxStatus[0] & TxStatOK )?TSAD_TOK0:0)
2521
2522 |((s->TxStatus[3] & TxUnderrun)?TSAD_TUN3:0)
2523 |((s->TxStatus[2] & TxUnderrun)?TSAD_TUN2:0)
2524 |((s->TxStatus[1] & TxUnderrun)?TSAD_TUN1:0)
2525 |((s->TxStatus[0] & TxUnderrun)?TSAD_TUN0:0)
2526
2527 |((s->TxStatus[3] & TxAborted )?TSAD_TABT3:0)
2528 |((s->TxStatus[2] & TxAborted )?TSAD_TABT2:0)
2529 |((s->TxStatus[1] & TxAborted )?TSAD_TABT1:0)
2530 |((s->TxStatus[0] & TxAborted )?TSAD_TABT0:0)
2531
2532 |((s->TxStatus[3] & TxHostOwns )?TSAD_OWN3:0)
2533 |((s->TxStatus[2] & TxHostOwns )?TSAD_OWN2:0)
2534 |((s->TxStatus[1] & TxHostOwns )?TSAD_OWN1:0)
2535 |((s->TxStatus[0] & TxHostOwns )?TSAD_OWN0:0) ;
2536
2537
2538 DPRINTF("TSAD read val=0x%04x\n", ret);
2539
2540 return ret;
2541 }
2542
2543 static uint16_t rtl8139_CSCR_read(RTL8139State *s)
2544 {
2545 uint16_t ret = s->CSCR;
2546
2547 DPRINTF("CSCR read val=0x%04x\n", ret);
2548
2549 return ret;
2550 }
2551
2552 static void rtl8139_TxAddr_write(RTL8139State *s, uint32_t txAddrOffset, uint32_t val)
2553 {
2554 DPRINTF("TxAddr write offset=0x%x val=0x%08x\n", txAddrOffset, val);
2555
2556 s->TxAddr[txAddrOffset/4] = val;
2557 }
2558
2559 static uint32_t rtl8139_TxAddr_read(RTL8139State *s, uint32_t txAddrOffset)
2560 {
2561 uint32_t ret = s->TxAddr[txAddrOffset/4];
2562
2563 DPRINTF("TxAddr read offset=0x%x val=0x%08x\n", txAddrOffset, ret);
2564
2565 return ret;
2566 }
2567
2568 static void rtl8139_RxBufPtr_write(RTL8139State *s, uint32_t val)
2569 {
2570 DPRINTF("RxBufPtr write val=0x%04x\n", val);
2571
2572 /* this value is off by 16 */
2573 s->RxBufPtr = MOD2(val + 0x10, s->RxBufferSize);
2574
2575 DPRINTF(" CAPR write: rx buffer length %d head 0x%04x read 0x%04x\n",
2576 s->RxBufferSize, s->RxBufAddr, s->RxBufPtr);
2577 }
2578
2579 static uint32_t rtl8139_RxBufPtr_read(RTL8139State *s)
2580 {
2581 /* this value is off by 16 */
2582 uint32_t ret = s->RxBufPtr - 0x10;
2583
2584 DPRINTF("RxBufPtr read val=0x%04x\n", ret);
2585
2586 return ret;
2587 }
2588
2589 static uint32_t rtl8139_RxBufAddr_read(RTL8139State *s)
2590 {
2591 /* this value is NOT off by 16 */
2592 uint32_t ret = s->RxBufAddr;
2593
2594 DPRINTF("RxBufAddr read val=0x%04x\n", ret);
2595
2596 return ret;
2597 }
2598
2599 static void rtl8139_RxBuf_write(RTL8139State *s, uint32_t val)
2600 {
2601 DPRINTF("RxBuf write val=0x%08x\n", val);
2602
2603 s->RxBuf = val;
2604
2605 /* may need to reset rxring here */
2606 }
2607
2608 static uint32_t rtl8139_RxBuf_read(RTL8139State *s)
2609 {
2610 uint32_t ret = s->RxBuf;
2611
2612 DPRINTF("RxBuf read val=0x%08x\n", ret);
2613
2614 return ret;
2615 }
2616
2617 static void rtl8139_IntrMask_write(RTL8139State *s, uint32_t val)
2618 {
2619 DPRINTF("IntrMask write(w) val=0x%04x\n", val);
2620
2621 /* mask unwritable bits */
2622 val = SET_MASKED(val, 0x1e00, s->IntrMask);
2623
2624 s->IntrMask = val;
2625
2626 rtl8139_set_next_tctr_time(s, qemu_get_clock_ns(vm_clock));
2627 rtl8139_update_irq(s);
2628
2629 }
2630
2631 static uint32_t rtl8139_IntrMask_read(RTL8139State *s)
2632 {
2633 uint32_t ret = s->IntrMask;
2634
2635 DPRINTF("IntrMask read(w) val=0x%04x\n", ret);
2636
2637 return ret;
2638 }
2639
2640 static void rtl8139_IntrStatus_write(RTL8139State *s, uint32_t val)
2641 {
2642 DPRINTF("IntrStatus write(w) val=0x%04x\n", val);
2643
2644 #if 0
2645
2646 /* writing to ISR has no effect */
2647
2648 return;
2649
2650 #else
2651 uint16_t newStatus = s->IntrStatus & ~val;
2652
2653 /* mask unwritable bits */
2654 newStatus = SET_MASKED(newStatus, 0x1e00, s->IntrStatus);
2655
2656 /* writing 1 to interrupt status register bit clears it */
2657 s->IntrStatus = 0;
2658 rtl8139_update_irq(s);
2659
2660 s->IntrStatus = newStatus;
2661 /*
2662 * Computing if we miss an interrupt here is not that correct but
2663 * considered that we should have had already an interrupt
2664 * and probably emulated is slower is better to assume this resetting was
2665 * done before testing on previous rtl8139_update_irq lead to IRQ loosing
2666 */
2667 rtl8139_set_next_tctr_time(s, qemu_get_clock_ns(vm_clock));
2668 rtl8139_update_irq(s);
2669
2670 #endif
2671 }
2672
2673 static uint32_t rtl8139_IntrStatus_read(RTL8139State *s)
2674 {
2675 rtl8139_set_next_tctr_time(s, qemu_get_clock_ns(vm_clock));
2676
2677 uint32_t ret = s->IntrStatus;
2678
2679 DPRINTF("IntrStatus read(w) val=0x%04x\n", ret);
2680
2681 #if 0
2682
2683 /* reading ISR clears all interrupts */
2684 s->IntrStatus = 0;
2685
2686 rtl8139_update_irq(s);
2687
2688 #endif
2689
2690 return ret;
2691 }
2692
2693 static void rtl8139_MultiIntr_write(RTL8139State *s, uint32_t val)
2694 {
2695 DPRINTF("MultiIntr write(w) val=0x%04x\n", val);
2696
2697 /* mask unwritable bits */
2698 val = SET_MASKED(val, 0xf000, s->MultiIntr);
2699
2700 s->MultiIntr = val;
2701 }
2702
2703 static uint32_t rtl8139_MultiIntr_read(RTL8139State *s)
2704 {
2705 uint32_t ret = s->MultiIntr;
2706
2707 DPRINTF("MultiIntr read(w) val=0x%04x\n", ret);
2708
2709 return ret;
2710 }
2711
2712 static void rtl8139_io_writeb(void *opaque, uint8_t addr, uint32_t val)
2713 {
2714 RTL8139State *s = opaque;
2715
2716 switch (addr)
2717 {
2718 case MAC0 ... MAC0+5:
2719 s->phys[addr - MAC0] = val;
2720 break;
2721 case MAC0+6 ... MAC0+7:
2722 /* reserved */
2723 break;
2724 case MAR0 ... MAR0+7:
2725 s->mult[addr - MAR0] = val;
2726 break;
2727 case ChipCmd:
2728 rtl8139_ChipCmd_write(s, val);
2729 break;
2730 case Cfg9346:
2731 rtl8139_Cfg9346_write(s, val);
2732 break;
2733 case TxConfig: /* windows driver sometimes writes using byte-lenth call */
2734 rtl8139_TxConfig_writeb(s, val);
2735 break;
2736 case Config0:
2737 rtl8139_Config0_write(s, val);
2738 break;
2739 case Config1:
2740 rtl8139_Config1_write(s, val);
2741 break;
2742 case Config3:
2743 rtl8139_Config3_write(s, val);
2744 break;
2745 case Config4:
2746 rtl8139_Config4_write(s, val);
2747 break;
2748 case Config5:
2749 rtl8139_Config5_write(s, val);
2750 break;
2751 case MediaStatus:
2752 /* ignore */
2753 DPRINTF("not implemented write(b) to MediaStatus val=0x%02x\n",
2754 val);
2755 break;
2756
2757 case HltClk:
2758 DPRINTF("HltClk write val=0x%08x\n", val);
2759 if (val == 'R')
2760 {
2761 s->clock_enabled = 1;
2762 }
2763 else if (val == 'H')
2764 {
2765 s->clock_enabled = 0;
2766 }
2767 break;
2768
2769 case TxThresh:
2770 DPRINTF("C+ TxThresh write(b) val=0x%02x\n", val);
2771 s->TxThresh = val;
2772 break;
2773
2774 case TxPoll:
2775 DPRINTF("C+ TxPoll write(b) val=0x%02x\n", val);
2776 if (val & (1 << 7))
2777 {
2778 DPRINTF("C+ TxPoll high priority transmission (not "
2779 "implemented)\n");
2780 //rtl8139_cplus_transmit(s);
2781 }
2782 if (val & (1 << 6))
2783 {
2784 DPRINTF("C+ TxPoll normal priority transmission\n");
2785 rtl8139_cplus_transmit(s);
2786 }
2787
2788 break;
2789
2790 default:
2791 DPRINTF("not implemented write(b) addr=0x%x val=0x%02x\n", addr,
2792 val);
2793 break;
2794 }
2795 }
2796
2797 static void rtl8139_io_writew(void *opaque, uint8_t addr, uint32_t val)
2798 {
2799 RTL8139State *s = opaque;
2800
2801 switch (addr)
2802 {
2803 case IntrMask:
2804 rtl8139_IntrMask_write(s, val);
2805 break;
2806
2807 case IntrStatus:
2808 rtl8139_IntrStatus_write(s, val);
2809 break;
2810
2811 case MultiIntr:
2812 rtl8139_MultiIntr_write(s, val);
2813 break;
2814
2815 case RxBufPtr:
2816 rtl8139_RxBufPtr_write(s, val);
2817 break;
2818
2819 case BasicModeCtrl:
2820 rtl8139_BasicModeCtrl_write(s, val);
2821 break;
2822 case BasicModeStatus:
2823 rtl8139_BasicModeStatus_write(s, val);
2824 break;
2825 case NWayAdvert:
2826 DPRINTF("NWayAdvert write(w) val=0x%04x\n", val);
2827 s->NWayAdvert = val;
2828 break;
2829 case NWayLPAR:
2830 DPRINTF("forbidden NWayLPAR write(w) val=0x%04x\n", val);
2831 break;
2832 case NWayExpansion:
2833 DPRINTF("NWayExpansion write(w) val=0x%04x\n", val);
2834 s->NWayExpansion = val;
2835 break;
2836
2837 case CpCmd:
2838 rtl8139_CpCmd_write(s, val);
2839 break;
2840
2841 case IntrMitigate:
2842 rtl8139_IntrMitigate_write(s, val);
2843 break;
2844
2845 default:
2846 DPRINTF("ioport write(w) addr=0x%x val=0x%04x via write(b)\n",
2847 addr, val);
2848
2849 rtl8139_io_writeb(opaque, addr, val & 0xff);
2850 rtl8139_io_writeb(opaque, addr + 1, (val >> 8) & 0xff);
2851 break;
2852 }
2853 }
2854
2855 static void rtl8139_set_next_tctr_time(RTL8139State *s, int64_t current_time)
2856 {
2857 int64_t pci_time, next_time;
2858 uint32_t low_pci;
2859
2860 DPRINTF("entered rtl8139_set_next_tctr_time\n");
2861
2862 if (s->TimerExpire && current_time >= s->TimerExpire) {
2863 s->IntrStatus |= PCSTimeout;
2864 rtl8139_update_irq(s);
2865 }
2866
2867 /* Set QEMU timer only if needed that is
2868 * - TimerInt <> 0 (we have a timer)
2869 * - mask = 1 (we want an interrupt timer)
2870 * - irq = 0 (irq is not already active)
2871 * If any of above change we need to compute timer again
2872 * Also we must check if timer is passed without QEMU timer
2873 */
2874 s->TimerExpire = 0;
2875 if (!s->TimerInt) {
2876 return;
2877 }
2878
2879 pci_time = muldiv64(current_time - s->TCTR_base, PCI_FREQUENCY,
2880 get_ticks_per_sec());
2881 low_pci = pci_time & 0xffffffff;
2882 pci_time = pci_time - low_pci + s->TimerInt;
2883 if (low_pci >= s->TimerInt) {
2884 pci_time += 0x100000000LL;
2885 }
2886 next_time = s->TCTR_base + muldiv64(pci_time, get_ticks_per_sec(),
2887 PCI_FREQUENCY);
2888 s->TimerExpire = next_time;
2889
2890 if ((s->IntrMask & PCSTimeout) != 0 && (s->IntrStatus & PCSTimeout) == 0) {
2891 qemu_mod_timer(s->timer, next_time);
2892 }
2893 }
2894
2895 static void rtl8139_io_writel(void *opaque, uint8_t addr, uint32_t val)
2896 {
2897 RTL8139State *s = opaque;
2898
2899 switch (addr)
2900 {
2901 case RxMissed:
2902 DPRINTF("RxMissed clearing on write\n");
2903 s->RxMissed = 0;
2904 break;
2905
2906 case TxConfig:
2907 rtl8139_TxConfig_write(s, val);
2908 break;
2909
2910 case RxConfig:
2911 rtl8139_RxConfig_write(s, val);
2912 break;
2913
2914 case TxStatus0 ... TxStatus0+4*4-1:
2915 rtl8139_TxStatus_write(s, addr-TxStatus0, val);
2916 break;
2917
2918 case TxAddr0 ... TxAddr0+4*4-1:
2919 rtl8139_TxAddr_write(s, addr-TxAddr0, val);
2920 break;
2921
2922 case RxBuf:
2923 rtl8139_RxBuf_write(s, val);
2924 break;
2925
2926 case RxRingAddrLO:
2927 DPRINTF("C+ RxRing low bits write val=0x%08x\n", val);
2928 s->RxRingAddrLO = val;
2929 break;
2930
2931 case RxRingAddrHI:
2932 DPRINTF("C+ RxRing high bits write val=0x%08x\n", val);
2933 s->RxRingAddrHI = val;
2934 break;
2935
2936 case Timer:
2937 DPRINTF("TCTR Timer reset on write\n");
2938 s->TCTR_base = qemu_get_clock_ns(vm_clock);
2939 rtl8139_set_next_tctr_time(s, s->TCTR_base);
2940 break;
2941
2942 case FlashReg:
2943 DPRINTF("FlashReg TimerInt write val=0x%08x\n", val);
2944 if (s->TimerInt != val) {
2945 s->TimerInt = val;
2946 rtl8139_set_next_tctr_time(s, qemu_get_clock_ns(vm_clock));
2947 }
2948 break;
2949
2950 default:
2951 DPRINTF("ioport write(l) addr=0x%x val=0x%08x via write(b)\n",
2952 addr, val);
2953 rtl8139_io_writeb(opaque, addr, val & 0xff);
2954 rtl8139_io_writeb(opaque, addr + 1, (val >> 8) & 0xff);
2955 rtl8139_io_writeb(opaque, addr + 2, (val >> 16) & 0xff);
2956 rtl8139_io_writeb(opaque, addr + 3, (val >> 24) & 0xff);
2957 break;
2958 }
2959 }
2960
2961 static uint32_t rtl8139_io_readb(void *opaque, uint8_t addr)
2962 {
2963 RTL8139State *s = opaque;
2964 int ret;
2965
2966 switch (addr)
2967 {
2968 case MAC0 ... MAC0+5:
2969 ret = s->phys[addr - MAC0];
2970 break;
2971 case MAC0+6 ... MAC0+7:
2972 ret = 0;
2973 break;
2974 case MAR0 ... MAR0+7:
2975 ret = s->mult[addr - MAR0];
2976 break;
2977 case ChipCmd:
2978 ret = rtl8139_ChipCmd_read(s);
2979 break;
2980 case Cfg9346:
2981 ret = rtl8139_Cfg9346_read(s);
2982 break;
2983 case Config0:
2984 ret = rtl8139_Config0_read(s);
2985 break;
2986 case Config1:
2987 ret = rtl8139_Config1_read(s);
2988 break;
2989 case Config3:
2990 ret = rtl8139_Config3_read(s);
2991 break;
2992 case Config4:
2993 ret = rtl8139_Config4_read(s);
2994 break;
2995 case Config5:
2996 ret = rtl8139_Config5_read(s);
2997 break;
2998
2999 case MediaStatus:
3000 ret = 0xd0;
3001 DPRINTF("MediaStatus read 0x%x\n", ret);
3002 break;
3003
3004 case HltClk:
3005 ret = s->clock_enabled;
3006 DPRINTF("HltClk read 0x%x\n", ret);
3007 break;
3008
3009 case PCIRevisionID:
3010 ret = RTL8139_PCI_REVID;
3011 DPRINTF("PCI Revision ID read 0x%x\n", ret);
3012 break;
3013
3014 case TxThresh:
3015 ret = s->TxThresh;
3016 DPRINTF("C+ TxThresh read(b) val=0x%02x\n", ret);
3017 break;
3018
3019 case 0x43: /* Part of TxConfig register. Windows driver tries to read it */
3020 ret = s->TxConfig >> 24;
3021 DPRINTF("RTL8139C TxConfig at 0x43 read(b) val=0x%02x\n", ret);
3022 break;
3023
3024 default:
3025 DPRINTF("not implemented read(b) addr=0x%x\n", addr);
3026 ret = 0;
3027 break;
3028 }
3029
3030 return ret;
3031 }
3032
3033 static uint32_t rtl8139_io_readw(void *opaque, uint8_t addr)
3034 {
3035 RTL8139State *s = opaque;
3036 uint32_t ret;
3037
3038 switch (addr)
3039 {
3040 case IntrMask:
3041 ret = rtl8139_IntrMask_read(s);
3042 break;
3043
3044 case IntrStatus:
3045 ret = rtl8139_IntrStatus_read(s);
3046 break;
3047
3048 case MultiIntr:
3049 ret = rtl8139_MultiIntr_read(s);
3050 break;
3051
3052 case RxBufPtr:
3053 ret = rtl8139_RxBufPtr_read(s);
3054 break;
3055
3056 case RxBufAddr:
3057 ret = rtl8139_RxBufAddr_read(s);
3058 break;
3059
3060 case BasicModeCtrl:
3061 ret = rtl8139_BasicModeCtrl_read(s);
3062 break;
3063 case BasicModeStatus:
3064 ret = rtl8139_BasicModeStatus_read(s);
3065 break;
3066 case NWayAdvert:
3067 ret = s->NWayAdvert;
3068 DPRINTF("NWayAdvert read(w) val=0x%04x\n", ret);
3069 break;
3070 case NWayLPAR:
3071 ret = s->NWayLPAR;
3072 DPRINTF("NWayLPAR read(w) val=0x%04x\n", ret);
3073 break;
3074 case NWayExpansion:
3075 ret = s->NWayExpansion;
3076 DPRINTF("NWayExpansion read(w) val=0x%04x\n", ret);
3077 break;
3078
3079 case CpCmd:
3080 ret = rtl8139_CpCmd_read(s);
3081 break;
3082
3083 case IntrMitigate:
3084 ret = rtl8139_IntrMitigate_read(s);
3085 break;
3086
3087 case TxSummary:
3088 ret = rtl8139_TSAD_read(s);
3089 break;
3090
3091 case CSCR:
3092 ret = rtl8139_CSCR_read(s);
3093 break;
3094
3095 default:
3096 DPRINTF("ioport read(w) addr=0x%x via read(b)\n", addr);
3097
3098 ret = rtl8139_io_readb(opaque, addr);
3099 ret |= rtl8139_io_readb(opaque, addr + 1) << 8;
3100
3101 DPRINTF("ioport read(w) addr=0x%x val=0x%04x\n", addr, ret);
3102 break;
3103 }
3104
3105 return ret;
3106 }
3107
3108 static uint32_t rtl8139_io_readl(void *opaque, uint8_t addr)
3109 {
3110 RTL8139State *s = opaque;
3111 uint32_t ret;
3112
3113 switch (addr)
3114 {
3115 case RxMissed:
3116 ret = s->RxMissed;
3117
3118 DPRINTF("RxMissed read val=0x%08x\n", ret);
3119 break;
3120
3121 case TxConfig:
3122 ret = rtl8139_TxConfig_read(s);
3123 break;
3124
3125 case RxConfig:
3126 ret = rtl8139_RxConfig_read(s);
3127 break;
3128
3129 case TxStatus0 ... TxStatus0+4*4-1:
3130 ret = rtl8139_TxStatus_read(s, addr-TxStatus0);
3131 break;
3132
3133 case TxAddr0 ... TxAddr0+4*4-1:
3134 ret = rtl8139_TxAddr_read(s, addr-TxAddr0);
3135 break;
3136
3137 case RxBuf:
3138 ret = rtl8139_RxBuf_read(s);
3139 break;
3140
3141 case RxRingAddrLO:
3142 ret = s->RxRingAddrLO;
3143 DPRINTF("C+ RxRing low bits read val=0x%08x\n", ret);
3144 break;
3145
3146 case RxRingAddrHI:
3147 ret = s->RxRingAddrHI;
3148 DPRINTF("C+ RxRing high bits read val=0x%08x\n", ret);
3149 break;
3150
3151 case Timer:
3152 ret = muldiv64(qemu_get_clock_ns(vm_clock) - s->TCTR_base,
3153 PCI_FREQUENCY, get_ticks_per_sec());
3154 DPRINTF("TCTR Timer read val=0x%08x\n", ret);
3155 break;
3156
3157 case FlashReg:
3158 ret = s->TimerInt;
3159 DPRINTF("FlashReg TimerInt read val=0x%08x\n", ret);
3160 break;
3161
3162 default:
3163 DPRINTF("ioport read(l) addr=0x%x via read(b)\n", addr);
3164
3165 ret = rtl8139_io_readb(opaque, addr);
3166 ret |= rtl8139_io_readb(opaque, addr + 1) << 8;
3167 ret |= rtl8139_io_readb(opaque, addr + 2) << 16;
3168 ret |= rtl8139_io_readb(opaque, addr + 3) << 24;
3169
3170 DPRINTF("read(l) addr=0x%x val=%08x\n", addr, ret);
3171 break;
3172 }
3173
3174 return ret;
3175 }
3176
3177 /* */
3178
3179 static void rtl8139_ioport_writeb(void *opaque, uint32_t addr, uint32_t val)
3180 {
3181 rtl8139_io_writeb(opaque, addr & 0xFF, val);
3182 }
3183
3184 static void rtl8139_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
3185 {
3186 rtl8139_io_writew(opaque, addr & 0xFF, val);
3187 }
3188
3189 static void rtl8139_ioport_writel(void *opaque, uint32_t addr, uint32_t val)
3190 {
3191 rtl8139_io_writel(opaque, addr & 0xFF, val);
3192 }
3193
3194 static uint32_t rtl8139_ioport_readb(void *opaque, uint32_t addr)
3195 {
3196 return rtl8139_io_readb(opaque, addr & 0xFF);
3197 }
3198
3199 static uint32_t rtl8139_ioport_readw(void *opaque, uint32_t addr)
3200 {
3201 return rtl8139_io_readw(opaque, addr & 0xFF);
3202 }
3203
3204 static uint32_t rtl8139_ioport_readl(void *opaque, uint32_t addr)
3205 {
3206 return rtl8139_io_readl(opaque, addr & 0xFF);
3207 }
3208
3209 /* */
3210
3211 static void rtl8139_mmio_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
3212 {
3213 rtl8139_io_writeb(opaque, addr & 0xFF, val);
3214 }
3215
3216 static void rtl8139_mmio_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
3217 {
3218 rtl8139_io_writew(opaque, addr & 0xFF, val);
3219 }
3220
3221 static void rtl8139_mmio_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
3222 {
3223 rtl8139_io_writel(opaque, addr & 0xFF, val);
3224 }
3225
3226 static uint32_t rtl8139_mmio_readb(void *opaque, target_phys_addr_t addr)
3227 {
3228 return rtl8139_io_readb(opaque, addr & 0xFF);
3229 }
3230
3231 static uint32_t rtl8139_mmio_readw(void *opaque, target_phys_addr_t addr)
3232 {
3233 uint32_t val = rtl8139_io_readw(opaque, addr & 0xFF);
3234 return val;
3235 }
3236
3237 static uint32_t rtl8139_mmio_readl(void *opaque, target_phys_addr_t addr)
3238 {
3239 uint32_t val = rtl8139_io_readl(opaque, addr & 0xFF);
3240 return val;
3241 }
3242
3243 static int rtl8139_post_load(void *opaque, int version_id)
3244 {
3245 RTL8139State* s = opaque;
3246 rtl8139_set_next_tctr_time(s, qemu_get_clock_ns(vm_clock));
3247 if (version_id < 4) {
3248 s->cplus_enabled = s->CpCmd != 0;
3249 }
3250
3251 return 0;
3252 }
3253
3254 static bool rtl8139_hotplug_ready_needed(void *opaque)
3255 {
3256 return qdev_machine_modified();
3257 }
3258
3259 static const VMStateDescription vmstate_rtl8139_hotplug_ready ={
3260 .name = "rtl8139/hotplug_ready",
3261 .version_id = 1,
3262 .minimum_version_id = 1,
3263 .minimum_version_id_old = 1,
3264 .fields = (VMStateField []) {
3265 VMSTATE_END_OF_LIST()
3266 }
3267 };
3268
3269 static void rtl8139_pre_save(void *opaque)
3270 {
3271 RTL8139State* s = opaque;
3272 int64_t current_time = qemu_get_clock_ns(vm_clock);
3273
3274 /* set IntrStatus correctly */
3275 rtl8139_set_next_tctr_time(s, current_time);
3276 s->TCTR = muldiv64(current_time - s->TCTR_base, PCI_FREQUENCY,
3277 get_ticks_per_sec());
3278 s->rtl8139_mmio_io_addr_dummy = 0;
3279 }
3280
3281 static const VMStateDescription vmstate_rtl8139 = {
3282 .name = "rtl8139",
3283 .version_id = 4,
3284 .minimum_version_id = 3,
3285 .minimum_version_id_old = 3,
3286 .post_load = rtl8139_post_load,
3287 .pre_save = rtl8139_pre_save,
3288 .fields = (VMStateField []) {
3289 VMSTATE_PCI_DEVICE(dev, RTL8139State),
3290 VMSTATE_PARTIAL_BUFFER(phys, RTL8139State, 6),
3291 VMSTATE_BUFFER(mult, RTL8139State),
3292 VMSTATE_UINT32_ARRAY(TxStatus, RTL8139State, 4),
3293 VMSTATE_UINT32_ARRAY(TxAddr, RTL8139State, 4),
3294
3295 VMSTATE_UINT32(RxBuf, RTL8139State),
3296 VMSTATE_UINT32(RxBufferSize, RTL8139State),
3297 VMSTATE_UINT32(RxBufPtr, RTL8139State),
3298 VMSTATE_UINT32(RxBufAddr, RTL8139State),
3299
3300 VMSTATE_UINT16(IntrStatus, RTL8139State),
3301 VMSTATE_UINT16(IntrMask, RTL8139State),
3302
3303 VMSTATE_UINT32(TxConfig, RTL8139State),
3304 VMSTATE_UINT32(RxConfig, RTL8139State),
3305 VMSTATE_UINT32(RxMissed, RTL8139State),
3306 VMSTATE_UINT16(CSCR, RTL8139State),
3307
3308 VMSTATE_UINT8(Cfg9346, RTL8139State),
3309 VMSTATE_UINT8(Config0, RTL8139State),
3310 VMSTATE_UINT8(Config1, RTL8139State),
3311 VMSTATE_UINT8(Config3, RTL8139State),
3312 VMSTATE_UINT8(Config4, RTL8139State),
3313 VMSTATE_UINT8(Config5, RTL8139State),
3314
3315 VMSTATE_UINT8(clock_enabled, RTL8139State),
3316 VMSTATE_UINT8(bChipCmdState, RTL8139State),
3317
3318 VMSTATE_UINT16(MultiIntr, RTL8139State),
3319
3320 VMSTATE_UINT16(BasicModeCtrl, RTL8139State),
3321 VMSTATE_UINT16(BasicModeStatus, RTL8139State),
3322 VMSTATE_UINT16(NWayAdvert, RTL8139State),
3323 VMSTATE_UINT16(NWayLPAR, RTL8139State),
3324 VMSTATE_UINT16(NWayExpansion, RTL8139State),
3325
3326 VMSTATE_UINT16(CpCmd, RTL8139State),
3327 VMSTATE_UINT8(TxThresh, RTL8139State),
3328
3329 VMSTATE_UNUSED(4),
3330 VMSTATE_MACADDR(conf.macaddr, RTL8139State),
3331 VMSTATE_INT32(rtl8139_mmio_io_addr_dummy, RTL8139State),
3332
3333 VMSTATE_UINT32(currTxDesc, RTL8139State),
3334 VMSTATE_UINT32(currCPlusRxDesc, RTL8139State),
3335 VMSTATE_UINT32(currCPlusTxDesc, RTL8139State),
3336 VMSTATE_UINT32(RxRingAddrLO, RTL8139State),
3337 VMSTATE_UINT32(RxRingAddrHI, RTL8139State),
3338
3339 VMSTATE_UINT16_ARRAY(eeprom.contents, RTL8139State, EEPROM_9346_SIZE),
3340 VMSTATE_INT32(eeprom.mode, RTL8139State),
3341 VMSTATE_UINT32(eeprom.tick, RTL8139State),
3342 VMSTATE_UINT8(eeprom.address, RTL8139State),
3343 VMSTATE_UINT16(eeprom.input, RTL8139State),
3344 VMSTATE_UINT16(eeprom.output, RTL8139State),
3345
3346 VMSTATE_UINT8(eeprom.eecs, RTL8139State),
3347 VMSTATE_UINT8(eeprom.eesk, RTL8139State),
3348 VMSTATE_UINT8(eeprom.eedi, RTL8139State),
3349 VMSTATE_UINT8(eeprom.eedo, RTL8139State),
3350
3351 VMSTATE_UINT32(TCTR, RTL8139State),
3352 VMSTATE_UINT32(TimerInt, RTL8139State),
3353 VMSTATE_INT64(TCTR_base, RTL8139State),
3354
3355 VMSTATE_STRUCT(tally_counters, RTL8139State, 0,
3356 vmstate_tally_counters, RTL8139TallyCounters),
3357
3358 VMSTATE_UINT32_V(cplus_enabled, RTL8139State, 4),
3359 VMSTATE_END_OF_LIST()
3360 },
3361 .subsections = (VMStateSubsection []) {
3362 {
3363 .vmsd = &vmstate_rtl8139_hotplug_ready,
3364 .needed = rtl8139_hotplug_ready_needed,
3365 }, {
3366 /* empty */
3367 }
3368 }
3369 };
3370
3371 /***********************************************************/
3372 /* PCI RTL8139 definitions */
3373
3374 static const MemoryRegionPortio rtl8139_portio[] = {
3375 { 0, 0x100, 1, .read = rtl8139_ioport_readb, },
3376 { 0, 0x100, 1, .write = rtl8139_ioport_writeb, },
3377 { 0, 0x100, 2, .read = rtl8139_ioport_readw, },
3378 { 0, 0x100, 2, .write = rtl8139_ioport_writew, },
3379 { 0, 0x100, 4, .read = rtl8139_ioport_readl, },
3380 { 0, 0x100, 4, .write = rtl8139_ioport_writel, },
3381 PORTIO_END_OF_LIST()
3382 };
3383
3384 static const MemoryRegionOps rtl8139_io_ops = {
3385 .old_portio = rtl8139_portio,
3386 .endianness = DEVICE_LITTLE_ENDIAN,
3387 };
3388
3389 static const MemoryRegionOps rtl8139_mmio_ops = {
3390 .old_mmio = {
3391 .read = {
3392 rtl8139_mmio_readb,
3393 rtl8139_mmio_readw,
3394 rtl8139_mmio_readl,
3395 },
3396 .write = {
3397 rtl8139_mmio_writeb,
3398 rtl8139_mmio_writew,
3399 rtl8139_mmio_writel,
3400 },
3401 },
3402 .endianness = DEVICE_LITTLE_ENDIAN,
3403 };
3404
3405 static void rtl8139_timer(void *opaque)
3406 {
3407 RTL8139State *s = opaque;
3408
3409 if (!s->clock_enabled)
3410 {
3411 DPRINTF(">>> timer: clock is not running\n");
3412 return;
3413 }
3414
3415 s->IntrStatus |= PCSTimeout;
3416 rtl8139_update_irq(s);
3417 rtl8139_set_next_tctr_time(s, qemu_get_clock_ns(vm_clock));
3418 }
3419
3420 static void rtl8139_cleanup(VLANClientState *nc)
3421 {
3422 RTL8139State *s = DO_UPCAST(NICState, nc, nc)->opaque;
3423
3424 s->nic = NULL;
3425 }
3426
3427 static int pci_rtl8139_uninit(PCIDevice *dev)
3428 {
3429 RTL8139State *s = DO_UPCAST(RTL8139State, dev, dev);
3430
3431 memory_region_destroy(&s->bar_io);
3432 memory_region_destroy(&s->bar_mem);
3433 if (s->cplus_txbuffer) {
3434 g_free(s->cplus_txbuffer);
3435 s->cplus_txbuffer = NULL;
3436 }
3437 qemu_del_timer(s->timer);
3438 qemu_free_timer(s->timer);
3439 qemu_del_vlan_client(&s->nic->nc);
3440 return 0;
3441 }
3442
3443 static NetClientInfo net_rtl8139_info = {
3444 .type = NET_CLIENT_TYPE_NIC,
3445 .size = sizeof(NICState),
3446 .can_receive = rtl8139_can_receive,
3447 .receive = rtl8139_receive,
3448 .cleanup = rtl8139_cleanup,
3449 };
3450
3451 static int pci_rtl8139_init(PCIDevice *dev)
3452 {
3453 RTL8139State * s = DO_UPCAST(RTL8139State, dev, dev);
3454 uint8_t *pci_conf;
3455
3456 pci_conf = s->dev.config;
3457 pci_conf[PCI_INTERRUPT_PIN] = 1; /* interrupt pin A */
3458 /* TODO: start of capability list, but no capability
3459 * list bit in status register, and offset 0xdc seems unused. */
3460 pci_conf[PCI_CAPABILITY_LIST] = 0xdc;
3461
3462 memory_region_init_io(&s->bar_io, &rtl8139_io_ops, s, "rtl8139", 0x100);
3463 memory_region_init_io(&s->bar_mem, &rtl8139_mmio_ops, s, "rtl8139", 0x100);
3464 pci_register_bar(&s->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->bar_io);
3465 pci_register_bar(&s->dev, 1, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->bar_mem);
3466
3467 qemu_macaddr_default_if_unset(&s->conf.macaddr);
3468
3469 /* prepare eeprom */
3470 s->eeprom.contents[0] = 0x8129;
3471 #if 1
3472 /* PCI vendor and device ID should be mirrored here */
3473 s->eeprom.contents[1] = PCI_VENDOR_ID_REALTEK;
3474 s->eeprom.contents[2] = PCI_DEVICE_ID_REALTEK_8139;
3475 #endif
3476 s->eeprom.contents[7] = s->conf.macaddr.a[0] | s->conf.macaddr.a[1] << 8;
3477 s->eeprom.contents[8] = s->conf.macaddr.a[2] | s->conf.macaddr.a[3] << 8;
3478 s->eeprom.contents[9] = s->conf.macaddr.a[4] | s->conf.macaddr.a[5] << 8;
3479
3480 s->nic = qemu_new_nic(&net_rtl8139_info, &s->conf,
3481 dev->qdev.info->name, dev->qdev.id, s);
3482 qemu_format_nic_info_str(&s->nic->nc, s->conf.macaddr.a);
3483
3484 s->cplus_txbuffer = NULL;
3485 s->cplus_txbuffer_len = 0;
3486 s->cplus_txbuffer_offset = 0;
3487
3488 s->TimerExpire = 0;
3489 s->timer = qemu_new_timer_ns(vm_clock, rtl8139_timer, s);
3490 rtl8139_set_next_tctr_time(s, qemu_get_clock_ns(vm_clock));
3491
3492 add_boot_device_path(s->conf.bootindex, &dev->qdev, "/ethernet-phy@0");
3493
3494 return 0;
3495 }
3496
3497 static PCIDeviceInfo rtl8139_info = {
3498 .qdev.name = "rtl8139",
3499 .qdev.size = sizeof(RTL8139State),
3500 .qdev.reset = rtl8139_reset,
3501 .qdev.vmsd = &vmstate_rtl8139,
3502 .init = pci_rtl8139_init,
3503 .exit = pci_rtl8139_uninit,
3504 .romfile = "pxe-rtl8139.rom",
3505 .vendor_id = PCI_VENDOR_ID_REALTEK,
3506 .device_id = PCI_DEVICE_ID_REALTEK_8139,
3507 .revision = RTL8139_PCI_REVID, /* >=0x20 is for 8139C+ */
3508 .class_id = PCI_CLASS_NETWORK_ETHERNET,
3509 .qdev.props = (Property[]) {
3510 DEFINE_NIC_PROPERTIES(RTL8139State, conf),
3511 DEFINE_PROP_END_OF_LIST(),
3512 }
3513 };
3514
3515 static void rtl8139_register_devices(void)
3516 {
3517 pci_qdev_register(&rtl8139_info);
3518 }
3519
3520 device_init(rtl8139_register_devices)
QEmu