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[qemu/ar7.git] / hw / net / rtl8139.c
blob2342a095e34e64488dc74eb31770900cc68be993
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
47 * Darwin)
48 * 2011-Mar-22 Benjamin Poirier: Implemented VLAN offloading
49 */
50
51 /* For crc32 */
52 #include "qemu/osdep.h"
53 #include <zlib.h>
54
55 #include "hw/hw.h"
56 #include "hw/pci/pci.h"
57 #include "sysemu/dma.h"
58 #include "qemu/timer.h"
59 #include "net/net.h"
60 #include "net/eth.h"
61 #include "sysemu/sysemu.h"
62
63 /* debug RTL8139 card */
64 //#define DEBUG_RTL8139 1
65
66 #define PCI_PERIOD 30 /* 30 ns period = 33.333333 Mhz frequency */
67
68 #define SET_MASKED(input, mask, curr) \
69 ( ( (input) & ~(mask) ) | ( (curr) & (mask) ) )
70
71 /* arg % size for size which is a power of 2 */
72 #define MOD2(input, size) \
73 ( ( input ) & ( size - 1 ) )
74
75 #define ETHER_TYPE_LEN 2
76 #define ETH_MTU 1500
77
78 #define VLAN_TCI_LEN 2
79 #define VLAN_HLEN (ETHER_TYPE_LEN + VLAN_TCI_LEN)
80
81 #if defined (DEBUG_RTL8139)
82 # define DPRINTF(fmt, ...) \
83 do { fprintf(stderr, "RTL8139: " fmt, ## __VA_ARGS__); } while (0)
84 #else
85 static inline GCC_FMT_ATTR(1, 2) int DPRINTF(const char *fmt, ...)
86 {
87 return 0;
88 }
89 #endif
90
91 #define TYPE_RTL8139 "rtl8139"
92
93 #define RTL8139(obj) \
94 OBJECT_CHECK(RTL8139State, (obj), TYPE_RTL8139)
95
96 /* Symbolic offsets to registers. */
97 enum RTL8139_registers {
98 MAC0 = 0, /* Ethernet hardware address. */
99 MAR0 = 8, /* Multicast filter. */
100 TxStatus0 = 0x10,/* Transmit status (Four 32bit registers). C mode only */
101 /* Dump Tally Conter control register(64bit). C+ mode only */
102 TxAddr0 = 0x20, /* Tx descriptors (also four 32bit). */
103 RxBuf = 0x30,
104 ChipCmd = 0x37,
105 RxBufPtr = 0x38,
106 RxBufAddr = 0x3A,
107 IntrMask = 0x3C,
108 IntrStatus = 0x3E,
109 TxConfig = 0x40,
110 RxConfig = 0x44,
111 Timer = 0x48, /* A general-purpose counter. */
112 RxMissed = 0x4C, /* 24 bits valid, write clears. */
113 Cfg9346 = 0x50,
114 Config0 = 0x51,
115 Config1 = 0x52,
116 FlashReg = 0x54,
117 MediaStatus = 0x58,
118 Config3 = 0x59,
119 Config4 = 0x5A, /* absent on RTL-8139A */
120 HltClk = 0x5B,
121 MultiIntr = 0x5C,
122 PCIRevisionID = 0x5E,
123 TxSummary = 0x60, /* TSAD register. Transmit Status of All Descriptors*/
124 BasicModeCtrl = 0x62,
125 BasicModeStatus = 0x64,
126 NWayAdvert = 0x66,
127 NWayLPAR = 0x68,
128 NWayExpansion = 0x6A,
129 /* Undocumented registers, but required for proper operation. */
130 FIFOTMS = 0x70, /* FIFO Control and test. */
131 CSCR = 0x74, /* Chip Status and Configuration Register. */
132 PARA78 = 0x78,
133 PARA7c = 0x7c, /* Magic transceiver parameter register. */
134 Config5 = 0xD8, /* absent on RTL-8139A */
135 /* C+ mode */
136 TxPoll = 0xD9, /* Tell chip to check Tx descriptors for work */
137 RxMaxSize = 0xDA, /* Max size of an Rx packet (8169 only) */
138 CpCmd = 0xE0, /* C+ Command register (C+ mode only) */
139 IntrMitigate = 0xE2, /* rx/tx interrupt mitigation control */
140 RxRingAddrLO = 0xE4, /* 64-bit start addr of Rx ring */
141 RxRingAddrHI = 0xE8, /* 64-bit start addr of Rx ring */
142 TxThresh = 0xEC, /* Early Tx threshold */
143 };
144
145 enum ClearBitMasks {
146 MultiIntrClear = 0xF000,
147 ChipCmdClear = 0xE2,
148 Config1Clear = (1<<7)|(1<<6)|(1<<3)|(1<<2)|(1<<1),
149 };
150
151 enum ChipCmdBits {
152 CmdReset = 0x10,
153 CmdRxEnb = 0x08,
154 CmdTxEnb = 0x04,
155 RxBufEmpty = 0x01,
156 };
157
158 /* C+ mode */
159 enum CplusCmdBits {
160 CPlusRxVLAN = 0x0040, /* enable receive VLAN detagging */
161 CPlusRxChkSum = 0x0020, /* enable receive checksum offloading */
162 CPlusRxEnb = 0x0002,
163 CPlusTxEnb = 0x0001,
164 };
165
166 /* Interrupt register bits, using my own meaningful names. */
167 enum IntrStatusBits {
168 PCIErr = 0x8000,
169 PCSTimeout = 0x4000,
170 RxFIFOOver = 0x40,
171 RxUnderrun = 0x20, /* Packet Underrun / Link Change */
172 RxOverflow = 0x10,
173 TxErr = 0x08,
174 TxOK = 0x04,
175 RxErr = 0x02,
176 RxOK = 0x01,
177
178 RxAckBits = RxFIFOOver | RxOverflow | RxOK,
179 };
180
181 enum TxStatusBits {
182 TxHostOwns = 0x2000,
183 TxUnderrun = 0x4000,
184 TxStatOK = 0x8000,
185 TxOutOfWindow = 0x20000000,
186 TxAborted = 0x40000000,
187 TxCarrierLost = 0x80000000,
188 };
189 enum RxStatusBits {
190 RxMulticast = 0x8000,
191 RxPhysical = 0x4000,
192 RxBroadcast = 0x2000,
193 RxBadSymbol = 0x0020,
194 RxRunt = 0x0010,
195 RxTooLong = 0x0008,
196 RxCRCErr = 0x0004,
197 RxBadAlign = 0x0002,
198 RxStatusOK = 0x0001,
199 };
200
201 /* Bits in RxConfig. */
202 enum rx_mode_bits {
203 AcceptErr = 0x20,
204 AcceptRunt = 0x10,
205 AcceptBroadcast = 0x08,
206 AcceptMulticast = 0x04,
207 AcceptMyPhys = 0x02,
208 AcceptAllPhys = 0x01,
209 };
210
211 /* Bits in TxConfig. */
212 enum tx_config_bits {
213
214 /* Interframe Gap Time. Only TxIFG96 doesn't violate IEEE 802.3 */
215 TxIFGShift = 24,
216 TxIFG84 = (0 << TxIFGShift), /* 8.4us / 840ns (10 / 100Mbps) */
217 TxIFG88 = (1 << TxIFGShift), /* 8.8us / 880ns (10 / 100Mbps) */
218 TxIFG92 = (2 << TxIFGShift), /* 9.2us / 920ns (10 / 100Mbps) */
219 TxIFG96 = (3 << TxIFGShift), /* 9.6us / 960ns (10 / 100Mbps) */
220
221 TxLoopBack = (1 << 18) | (1 << 17), /* enable loopback test mode */
222 TxCRC = (1 << 16), /* DISABLE appending CRC to end of Tx packets */
223 TxClearAbt = (1 << 0), /* Clear abort (WO) */
224 TxDMAShift = 8, /* DMA burst value (0-7) is shifted this many bits */
225 TxRetryShift = 4, /* TXRR value (0-15) is shifted this many bits */
226
227 TxVersionMask = 0x7C800000, /* mask out version bits 30-26, 23 */
228 };
229
230
231 /* Transmit Status of All Descriptors (TSAD) Register */
232 enum TSAD_bits {
233 TSAD_TOK3 = 1<<15, // TOK bit of Descriptor 3
234 TSAD_TOK2 = 1<<14, // TOK bit of Descriptor 2
235 TSAD_TOK1 = 1<<13, // TOK bit of Descriptor 1
236 TSAD_TOK0 = 1<<12, // TOK bit of Descriptor 0
237 TSAD_TUN3 = 1<<11, // TUN bit of Descriptor 3
238 TSAD_TUN2 = 1<<10, // TUN bit of Descriptor 2
239 TSAD_TUN1 = 1<<9, // TUN bit of Descriptor 1
240 TSAD_TUN0 = 1<<8, // TUN bit of Descriptor 0
241 TSAD_TABT3 = 1<<07, // TABT bit of Descriptor 3
242 TSAD_TABT2 = 1<<06, // TABT bit of Descriptor 2
243 TSAD_TABT1 = 1<<05, // TABT bit of Descriptor 1
244 TSAD_TABT0 = 1<<04, // TABT bit of Descriptor 0
245 TSAD_OWN3 = 1<<03, // OWN bit of Descriptor 3
246 TSAD_OWN2 = 1<<02, // OWN bit of Descriptor 2
247 TSAD_OWN1 = 1<<01, // OWN bit of Descriptor 1
248 TSAD_OWN0 = 1<<00, // OWN bit of Descriptor 0
249 };
250
251
252 /* Bits in Config1 */
253 enum Config1Bits {
254 Cfg1_PM_Enable = 0x01,
255 Cfg1_VPD_Enable = 0x02,
256 Cfg1_PIO = 0x04,
257 Cfg1_MMIO = 0x08,
258 LWAKE = 0x10, /* not on 8139, 8139A */
259 Cfg1_Driver_Load = 0x20,
260 Cfg1_LED0 = 0x40,
261 Cfg1_LED1 = 0x80,
262 SLEEP = (1 << 1), /* only on 8139, 8139A */
263 PWRDN = (1 << 0), /* only on 8139, 8139A */
264 };
265
266 /* Bits in Config3 */
267 enum Config3Bits {
268 Cfg3_FBtBEn = (1 << 0), /* 1 = Fast Back to Back */
269 Cfg3_FuncRegEn = (1 << 1), /* 1 = enable CardBus Function registers */
270 Cfg3_CLKRUN_En = (1 << 2), /* 1 = enable CLKRUN */
271 Cfg3_CardB_En = (1 << 3), /* 1 = enable CardBus registers */
272 Cfg3_LinkUp = (1 << 4), /* 1 = wake up on link up */
273 Cfg3_Magic = (1 << 5), /* 1 = wake up on Magic Packet (tm) */
274 Cfg3_PARM_En = (1 << 6), /* 0 = software can set twister parameters */
275 Cfg3_GNTSel = (1 << 7), /* 1 = delay 1 clock from PCI GNT signal */
276 };
277
278 /* Bits in Config4 */
279 enum Config4Bits {
280 LWPTN = (1 << 2), /* not on 8139, 8139A */
281 };
282
283 /* Bits in Config5 */
284 enum Config5Bits {
285 Cfg5_PME_STS = (1 << 0), /* 1 = PCI reset resets PME_Status */
286 Cfg5_LANWake = (1 << 1), /* 1 = enable LANWake signal */
287 Cfg5_LDPS = (1 << 2), /* 0 = save power when link is down */
288 Cfg5_FIFOAddrPtr = (1 << 3), /* Realtek internal SRAM testing */
289 Cfg5_UWF = (1 << 4), /* 1 = accept unicast wakeup frame */
290 Cfg5_MWF = (1 << 5), /* 1 = accept multicast wakeup frame */
291 Cfg5_BWF = (1 << 6), /* 1 = accept broadcast wakeup frame */
292 };
293
294 enum RxConfigBits {
295 /* rx fifo threshold */
296 RxCfgFIFOShift = 13,
297 RxCfgFIFONone = (7 << RxCfgFIFOShift),
298
299 /* Max DMA burst */
300 RxCfgDMAShift = 8,
301 RxCfgDMAUnlimited = (7 << RxCfgDMAShift),
302
303 /* rx ring buffer length */
304 RxCfgRcv8K = 0,
305 RxCfgRcv16K = (1 << 11),
306 RxCfgRcv32K = (1 << 12),
307 RxCfgRcv64K = (1 << 11) | (1 << 12),
308
309 /* Disable packet wrap at end of Rx buffer. (not possible with 64k) */
310 RxNoWrap = (1 << 7),
311 };
312
313 /* Twister tuning parameters from RealTek.
314 Completely undocumented, but required to tune bad links on some boards. */
315 /*
316 enum CSCRBits {
317 CSCR_LinkOKBit = 0x0400,
318 CSCR_LinkChangeBit = 0x0800,
319 CSCR_LinkStatusBits = 0x0f000,
320 CSCR_LinkDownOffCmd = 0x003c0,
321 CSCR_LinkDownCmd = 0x0f3c0,
322 */
323 enum CSCRBits {
324 CSCR_Testfun = 1<<15, /* 1 = Auto-neg speeds up internal timer, WO, def 0 */
325 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*/
326 CSCR_HEART_BIT = 1<<8, /* 1 = HEART BEAT enable, 0 = HEART BEAT disable. HEART BEAT function is only valid in 10Mbps mode. def 1*/
327 CSCR_JBEN = 1<<7, /* 1 = enable jabber function. 0 = disable jabber function, def 1*/
328 CSCR_F_LINK_100 = 1<<6, /* Used to login force good link in 100Mbps for diagnostic purposes. 1 = DISABLE, 0 = ENABLE. def 1*/
329 CSCR_F_Connect = 1<<5, /* Assertion of this bit forces the disconnect function to be bypassed. def 0*/
330 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*/
331 CSCR_Con_status_En = 1<<2, /* Assertion of this bit configures LED1 pin to indicate connection status. def 0*/
332 CSCR_PASS_SCR = 1<<0, /* Bypass Scramble, def 0*/
333 };
334
335 enum Cfg9346Bits {
336 Cfg9346_Normal = 0x00,
337 Cfg9346_Autoload = 0x40,
338 Cfg9346_Programming = 0x80,
339 Cfg9346_ConfigWrite = 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 /*< private >*/
433 PCIDevice parent_obj;
434 /*< public >*/
435
436 uint8_t phys[8]; /* mac address */
437 uint8_t mult[8]; /* multicast mask array */
438
439 uint32_t TxStatus[4]; /* TxStatus0 in C mode*/ /* also DTCCR[0] and DTCCR[1] in C+ mode */
440 uint32_t TxAddr[4]; /* TxAddr0 */
441 uint32_t RxBuf; /* Receive buffer */
442 uint32_t RxBufferSize;/* internal variable, receive ring buffer size in C mode */
443 uint32_t RxBufPtr;
444 uint32_t RxBufAddr;
445
446 uint16_t IntrStatus;
447 uint16_t IntrMask;
448
449 uint32_t TxConfig;
450 uint32_t RxConfig;
451 uint32_t RxMissed;
452
453 uint16_t CSCR;
454
455 uint8_t Cfg9346;
456 uint8_t Config0;
457 uint8_t Config1;
458 uint8_t Config3;
459 uint8_t Config4;
460 uint8_t Config5;
461
462 uint8_t clock_enabled;
463 uint8_t bChipCmdState;
464
465 uint16_t MultiIntr;
466
467 uint16_t BasicModeCtrl;
468 uint16_t BasicModeStatus;
469 uint16_t NWayAdvert;
470 uint16_t NWayLPAR;
471 uint16_t NWayExpansion;
472
473 uint16_t CpCmd;
474 uint8_t TxThresh;
475
476 NICState *nic;
477 NICConf conf;
478
479 /* C ring mode */
480 uint32_t currTxDesc;
481
482 /* C+ mode */
483 uint32_t cplus_enabled;
484
485 uint32_t currCPlusRxDesc;
486 uint32_t currCPlusTxDesc;
487
488 uint32_t RxRingAddrLO;
489 uint32_t RxRingAddrHI;
490
491 EEprom9346 eeprom;
492
493 uint32_t TCTR;
494 uint32_t TimerInt;
495 int64_t TCTR_base;
496
497 /* Tally counters */
498 RTL8139TallyCounters tally_counters;
499
500 /* Non-persistent data */
501 uint8_t *cplus_txbuffer;
502 int cplus_txbuffer_len;
503 int cplus_txbuffer_offset;
504
505 /* PCI interrupt timer */
506 QEMUTimer *timer;
507
508 MemoryRegion bar_io;
509 MemoryRegion bar_mem;
510
511 /* Support migration to/from old versions */
512 int rtl8139_mmio_io_addr_dummy;
513 } RTL8139State;
514
515 /* Writes tally counters to memory via DMA */
516 static void RTL8139TallyCounters_dma_write(RTL8139State *s, dma_addr_t tc_addr);
517
518 static void rtl8139_set_next_tctr_time(RTL8139State *s);
519
520 static void prom9346_decode_command(EEprom9346 *eeprom, uint8_t command)
521 {
522 DPRINTF("eeprom command 0x%02x\n", command);
523
524 switch (command & Chip9346_op_mask)
525 {
526 case Chip9346_op_read:
527 {
528 eeprom->address = command & EEPROM_9346_ADDR_MASK;
529 eeprom->output = eeprom->contents[eeprom->address];
530 eeprom->eedo = 0;
531 eeprom->tick = 0;
532 eeprom->mode = Chip9346_data_read;
533 DPRINTF("eeprom read from address 0x%02x data=0x%04x\n",
534 eeprom->address, eeprom->output);
535 }
536 break;
537
538 case Chip9346_op_write:
539 {
540 eeprom->address = command & EEPROM_9346_ADDR_MASK;
541 eeprom->input = 0;
542 eeprom->tick = 0;
543 eeprom->mode = Chip9346_none; /* Chip9346_data_write */
544 DPRINTF("eeprom begin write to address 0x%02x\n",
545 eeprom->address);
546 }
547 break;
548 default:
549 eeprom->mode = Chip9346_none;
550 switch (command & Chip9346_op_ext_mask)
551 {
552 case Chip9346_op_write_enable:
553 DPRINTF("eeprom write enabled\n");
554 break;
555 case Chip9346_op_write_all:
556 DPRINTF("eeprom begin write all\n");
557 break;
558 case Chip9346_op_write_disable:
559 DPRINTF("eeprom write disabled\n");
560 break;
561 }
562 break;
563 }
564 }
565
566 static void prom9346_shift_clock(EEprom9346 *eeprom)
567 {
568 int bit = eeprom->eedi?1:0;
569
570 ++ eeprom->tick;
571
572 DPRINTF("eeprom: tick %d eedi=%d eedo=%d\n", eeprom->tick, eeprom->eedi,
573 eeprom->eedo);
574
575 switch (eeprom->mode)
576 {
577 case Chip9346_enter_command_mode:
578 if (bit)
579 {
580 eeprom->mode = Chip9346_read_command;
581 eeprom->tick = 0;
582 eeprom->input = 0;
583 DPRINTF("eeprom: +++ synchronized, begin command read\n");
584 }
585 break;
586
587 case Chip9346_read_command:
588 eeprom->input = (eeprom->input << 1) | (bit & 1);
589 if (eeprom->tick == 8)
590 {
591 prom9346_decode_command(eeprom, eeprom->input & 0xff);
592 }
593 break;
594
595 case Chip9346_data_read:
596 eeprom->eedo = (eeprom->output & 0x8000)?1:0;
597 eeprom->output <<= 1;
598 if (eeprom->tick == 16)
599 {
600 #if 1
601 // the FreeBSD drivers (rl and re) don't explicitly toggle
602 // CS between reads (or does setting Cfg9346 to 0 count too?),
603 // so we need to enter wait-for-command state here
604 eeprom->mode = Chip9346_enter_command_mode;
605 eeprom->input = 0;
606 eeprom->tick = 0;
607
608 DPRINTF("eeprom: +++ end of read, awaiting next command\n");
609 #else
610 // original behaviour
611 ++eeprom->address;
612 eeprom->address &= EEPROM_9346_ADDR_MASK;
613 eeprom->output = eeprom->contents[eeprom->address];
614 eeprom->tick = 0;
615
616 DPRINTF("eeprom: +++ read next address 0x%02x data=0x%04x\n",
617 eeprom->address, eeprom->output);
618 #endif
619 }
620 break;
621
622 case Chip9346_data_write:
623 eeprom->input = (eeprom->input << 1) | (bit & 1);
624 if (eeprom->tick == 16)
625 {
626 DPRINTF("eeprom write to address 0x%02x data=0x%04x\n",
627 eeprom->address, eeprom->input);
628
629 eeprom->contents[eeprom->address] = eeprom->input;
630 eeprom->mode = Chip9346_none; /* waiting for next command after CS cycle */
631 eeprom->tick = 0;
632 eeprom->input = 0;
633 }
634 break;
635
636 case Chip9346_data_write_all:
637 eeprom->input = (eeprom->input << 1) | (bit & 1);
638 if (eeprom->tick == 16)
639 {
640 int i;
641 for (i = 0; i < EEPROM_9346_SIZE; i++)
642 {
643 eeprom->contents[i] = eeprom->input;
644 }
645 DPRINTF("eeprom filled with data=0x%04x\n", eeprom->input);
646
647 eeprom->mode = Chip9346_enter_command_mode;
648 eeprom->tick = 0;
649 eeprom->input = 0;
650 }
651 break;
652
653 default:
654 break;
655 }
656 }
657
658 static int prom9346_get_wire(RTL8139State *s)
659 {
660 EEprom9346 *eeprom = &s->eeprom;
661 if (!eeprom->eecs)
662 return 0;
663
664 return eeprom->eedo;
665 }
666
667 /* FIXME: This should be merged into/replaced by eeprom93xx.c. */
668 static void prom9346_set_wire(RTL8139State *s, int eecs, int eesk, int eedi)
669 {
670 EEprom9346 *eeprom = &s->eeprom;
671 uint8_t old_eecs = eeprom->eecs;
672 uint8_t old_eesk = eeprom->eesk;
673
674 eeprom->eecs = eecs;
675 eeprom->eesk = eesk;
676 eeprom->eedi = eedi;
677
678 DPRINTF("eeprom: +++ wires CS=%d SK=%d DI=%d DO=%d\n", eeprom->eecs,
679 eeprom->eesk, eeprom->eedi, eeprom->eedo);
680
681 if (!old_eecs && eecs)
682 {
683 /* Synchronize start */
684 eeprom->tick = 0;
685 eeprom->input = 0;
686 eeprom->output = 0;
687 eeprom->mode = Chip9346_enter_command_mode;
688
689 DPRINTF("=== eeprom: begin access, enter command mode\n");
690 }
691
692 if (!eecs)
693 {
694 DPRINTF("=== eeprom: end access\n");
695 return;
696 }
697
698 if (!old_eesk && eesk)
699 {
700 /* SK front rules */
701 prom9346_shift_clock(eeprom);
702 }
703 }
704
705 static void rtl8139_update_irq(RTL8139State *s)
706 {
707 PCIDevice *d = PCI_DEVICE(s);
708 int isr;
709 isr = (s->IntrStatus & s->IntrMask) & 0xffff;
710
711 DPRINTF("Set IRQ to %d (%04x %04x)\n", isr ? 1 : 0, s->IntrStatus,
712 s->IntrMask);
713
714 pci_set_irq(d, (isr != 0));
715 }
716
717 static int rtl8139_RxWrap(RTL8139State *s)
718 {
719 /* wrapping enabled; assume 1.5k more buffer space if size < 65536 */
720 return (s->RxConfig & (1 << 7));
721 }
722
723 static int rtl8139_receiver_enabled(RTL8139State *s)
724 {
725 return s->bChipCmdState & CmdRxEnb;
726 }
727
728 static int rtl8139_transmitter_enabled(RTL8139State *s)
729 {
730 return s->bChipCmdState & CmdTxEnb;
731 }
732
733 static int rtl8139_cp_receiver_enabled(RTL8139State *s)
734 {
735 return s->CpCmd & CPlusRxEnb;
736 }
737
738 static int rtl8139_cp_transmitter_enabled(RTL8139State *s)
739 {
740 return s->CpCmd & CPlusTxEnb;
741 }
742
743 static void rtl8139_write_buffer(RTL8139State *s, const void *buf, int size)
744 {
745 PCIDevice *d = PCI_DEVICE(s);
746
747 if (s->RxBufAddr + size > s->RxBufferSize)
748 {
749 int wrapped = MOD2(s->RxBufAddr + size, s->RxBufferSize);
750
751 /* write packet data */
752 if (wrapped && !(s->RxBufferSize < 65536 && rtl8139_RxWrap(s)))
753 {
754 DPRINTF(">>> rx packet wrapped in buffer at %d\n", size - wrapped);
755
756 if (size > wrapped)
757 {
758 pci_dma_write(d, s->RxBuf + s->RxBufAddr,
759 buf, size-wrapped);
760 }
761
762 /* reset buffer pointer */
763 s->RxBufAddr = 0;
764
765 pci_dma_write(d, s->RxBuf + s->RxBufAddr,
766 buf + (size-wrapped), wrapped);
767
768 s->RxBufAddr = wrapped;
769
770 return;
771 }
772 }
773
774 /* non-wrapping path or overwrapping enabled */
775 pci_dma_write(d, s->RxBuf + s->RxBufAddr, buf, size);
776
777 s->RxBufAddr += size;
778 }
779
780 #define MIN_BUF_SIZE 60
781 static inline dma_addr_t rtl8139_addr64(uint32_t low, uint32_t high)
782 {
783 return low | ((uint64_t)high << 32);
784 }
785
786 /* Workaround for buggy guest driver such as linux who allocates rx
787 * rings after the receiver were enabled. */
788 static bool rtl8139_cp_rx_valid(RTL8139State *s)
789 {
790 return !(s->RxRingAddrLO == 0 && s->RxRingAddrHI == 0);
791 }
792
793 static int rtl8139_can_receive(NetClientState *nc)
794 {
795 RTL8139State *s = qemu_get_nic_opaque(nc);
796 int avail;
797
798 /* Receive (drop) packets if card is disabled. */
799 if (!s->clock_enabled)
800 return 1;
801 if (!rtl8139_receiver_enabled(s))
802 return 1;
803
804 if (rtl8139_cp_receiver_enabled(s) && rtl8139_cp_rx_valid(s)) {
805 /* ??? Flow control not implemented in c+ mode.
806 This is a hack to work around slirp deficiencies anyway. */
807 return 1;
808 } else {
809 avail = MOD2(s->RxBufferSize + s->RxBufPtr - s->RxBufAddr,
810 s->RxBufferSize);
811 return (avail == 0 || avail >= 1514 || (s->IntrMask & RxOverflow));
812 }
813 }
814
815 static ssize_t rtl8139_do_receive(NetClientState *nc, const uint8_t *buf, size_t size_, int do_interrupt)
816 {
817 RTL8139State *s = qemu_get_nic_opaque(nc);
818 PCIDevice *d = PCI_DEVICE(s);
819 /* size is the length of the buffer passed to the driver */
820 size_t size = size_;
821 const uint8_t *dot1q_buf = NULL;
822
823 uint32_t packet_header = 0;
824
825 uint8_t buf1[MIN_BUF_SIZE + VLAN_HLEN];
826 static const uint8_t broadcast_macaddr[6] =
827 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
828
829 DPRINTF(">>> received len=%zu\n", size);
830
831 /* test if board clock is stopped */
832 if (!s->clock_enabled)
833 {
834 DPRINTF("stopped ==========================\n");
835 return -1;
836 }
837
838 /* first check if receiver is enabled */
839
840 if (!rtl8139_receiver_enabled(s))
841 {
842 DPRINTF("receiver disabled ================\n");
843 return -1;
844 }
845
846 /* XXX: check this */
847 if (s->RxConfig & AcceptAllPhys) {
848 /* promiscuous: receive all */
849 DPRINTF(">>> packet received in promiscuous mode\n");
850
851 } else {
852 if (!memcmp(buf, broadcast_macaddr, 6)) {
853 /* broadcast address */
854 if (!(s->RxConfig & AcceptBroadcast))
855 {
856 DPRINTF(">>> broadcast packet rejected\n");
857
858 /* update tally counter */
859 ++s->tally_counters.RxERR;
860
861 return size;
862 }
863
864 packet_header |= RxBroadcast;
865
866 DPRINTF(">>> broadcast packet received\n");
867
868 /* update tally counter */
869 ++s->tally_counters.RxOkBrd;
870
871 } else if (buf[0] & 0x01) {
872 /* multicast */
873 if (!(s->RxConfig & AcceptMulticast))
874 {
875 DPRINTF(">>> multicast packet rejected\n");
876
877 /* update tally counter */
878 ++s->tally_counters.RxERR;
879
880 return size;
881 }
882
883 int mcast_idx = net_crc32(buf, ETH_ALEN) >> 26;
884
885 if (!(s->mult[mcast_idx >> 3] & (1 << (mcast_idx & 7))))
886 {
887 DPRINTF(">>> multicast address mismatch\n");
888
889 /* update tally counter */
890 ++s->tally_counters.RxERR;
891
892 return size;
893 }
894
895 packet_header |= RxMulticast;
896
897 DPRINTF(">>> multicast packet received\n");
898
899 /* update tally counter */
900 ++s->tally_counters.RxOkMul;
901
902 } else if (s->phys[0] == buf[0] &&
903 s->phys[1] == buf[1] &&
904 s->phys[2] == buf[2] &&
905 s->phys[3] == buf[3] &&
906 s->phys[4] == buf[4] &&
907 s->phys[5] == buf[5]) {
908 /* match */
909 if (!(s->RxConfig & AcceptMyPhys))
910 {
911 DPRINTF(">>> rejecting physical address matching packet\n");
912
913 /* update tally counter */
914 ++s->tally_counters.RxERR;
915
916 return size;
917 }
918
919 packet_header |= RxPhysical;
920
921 DPRINTF(">>> physical address matching packet received\n");
922
923 /* update tally counter */
924 ++s->tally_counters.RxOkPhy;
925
926 } else {
927
928 DPRINTF(">>> unknown packet\n");
929
930 /* update tally counter */
931 ++s->tally_counters.RxERR;
932
933 return size;
934 }
935 }
936
937 /* if too small buffer, then expand it
938 * Include some tailroom in case a vlan tag is later removed. */
939 if (size < MIN_BUF_SIZE + VLAN_HLEN) {
940 memcpy(buf1, buf, size);
941 memset(buf1 + size, 0, MIN_BUF_SIZE + VLAN_HLEN - size);
942 buf = buf1;
943 if (size < MIN_BUF_SIZE) {
944 size = MIN_BUF_SIZE;
945 }
946 }
947
948 if (rtl8139_cp_receiver_enabled(s))
949 {
950 if (!rtl8139_cp_rx_valid(s)) {
951 return size;
952 }
953
954 DPRINTF("in C+ Rx mode ================\n");
955
956 /* begin C+ receiver mode */
957
958 /* w0 ownership flag */
959 #define CP_RX_OWN (1<<31)
960 /* w0 end of ring flag */
961 #define CP_RX_EOR (1<<30)
962 /* w0 bits 0...12 : buffer size */
963 #define CP_RX_BUFFER_SIZE_MASK ((1<<13) - 1)
964 /* w1 tag available flag */
965 #define CP_RX_TAVA (1<<16)
966 /* w1 bits 0...15 : VLAN tag */
967 #define CP_RX_VLAN_TAG_MASK ((1<<16) - 1)
968 /* w2 low 32bit of Rx buffer ptr */
969 /* w3 high 32bit of Rx buffer ptr */
970
971 int descriptor = s->currCPlusRxDesc;
972 dma_addr_t cplus_rx_ring_desc;
973
974 cplus_rx_ring_desc = rtl8139_addr64(s->RxRingAddrLO, s->RxRingAddrHI);
975 cplus_rx_ring_desc += 16 * descriptor;
976
977 DPRINTF("+++ C+ mode reading RX descriptor %d from host memory at "
978 "%08x %08x = "DMA_ADDR_FMT"\n", descriptor, s->RxRingAddrHI,
979 s->RxRingAddrLO, cplus_rx_ring_desc);
980
981 uint32_t val, rxdw0,rxdw1,rxbufLO,rxbufHI;
982
983 pci_dma_read(d, cplus_rx_ring_desc, &val, 4);
984 rxdw0 = le32_to_cpu(val);
985 pci_dma_read(d, cplus_rx_ring_desc+4, &val, 4);
986 rxdw1 = le32_to_cpu(val);
987 pci_dma_read(d, cplus_rx_ring_desc+8, &val, 4);
988 rxbufLO = le32_to_cpu(val);
989 pci_dma_read(d, cplus_rx_ring_desc+12, &val, 4);
990 rxbufHI = le32_to_cpu(val);
991
992 DPRINTF("+++ C+ mode RX descriptor %d %08x %08x %08x %08x\n",
993 descriptor, rxdw0, rxdw1, rxbufLO, rxbufHI);
994
995 if (!(rxdw0 & CP_RX_OWN))
996 {
997 DPRINTF("C+ Rx mode : descriptor %d is owned by host\n",
998 descriptor);
999
1000 s->IntrStatus |= RxOverflow;
1001 ++s->RxMissed;
1002
1003 /* update tally counter */
1004 ++s->tally_counters.RxERR;
1005 ++s->tally_counters.MissPkt;
1006
1007 rtl8139_update_irq(s);
1008 return size_;
1009 }
1010
1011 uint32_t rx_space = rxdw0 & CP_RX_BUFFER_SIZE_MASK;
1012
1013 /* write VLAN info to descriptor variables. */
1014 if (s->CpCmd & CPlusRxVLAN &&
1015 lduw_be_p(&buf[ETH_ALEN * 2]) == ETH_P_VLAN) {
1016 dot1q_buf = &buf[ETH_ALEN * 2];
1017 size -= VLAN_HLEN;
1018 /* if too small buffer, use the tailroom added duing expansion */
1019 if (size < MIN_BUF_SIZE) {
1020 size = MIN_BUF_SIZE;
1021 }
1022
1023 rxdw1 &= ~CP_RX_VLAN_TAG_MASK;
1024 /* BE + ~le_to_cpu()~ + cpu_to_le() = BE */
1025 rxdw1 |= CP_RX_TAVA | lduw_le_p(&dot1q_buf[ETHER_TYPE_LEN]);
1026
1027 DPRINTF("C+ Rx mode : extracted vlan tag with tci: ""%u\n",
1028 lduw_be_p(&dot1q_buf[ETHER_TYPE_LEN]));
1029 } else {
1030 /* reset VLAN tag flag */
1031 rxdw1 &= ~CP_RX_TAVA;
1032 }
1033
1034 /* TODO: scatter the packet over available receive ring descriptors space */
1035
1036 if (size+4 > rx_space)
1037 {
1038 DPRINTF("C+ Rx mode : descriptor %d size %d received %zu + 4\n",
1039 descriptor, rx_space, size);
1040
1041 s->IntrStatus |= RxOverflow;
1042 ++s->RxMissed;
1043
1044 /* update tally counter */
1045 ++s->tally_counters.RxERR;
1046 ++s->tally_counters.MissPkt;
1047
1048 rtl8139_update_irq(s);
1049 return size_;
1050 }
1051
1052 dma_addr_t rx_addr = rtl8139_addr64(rxbufLO, rxbufHI);
1053
1054 /* receive/copy to target memory */
1055 if (dot1q_buf) {
1056 pci_dma_write(d, rx_addr, buf, 2 * ETH_ALEN);
1057 pci_dma_write(d, rx_addr + 2 * ETH_ALEN,
1058 buf + 2 * ETH_ALEN + VLAN_HLEN,
1059 size - 2 * ETH_ALEN);
1060 } else {
1061 pci_dma_write(d, rx_addr, buf, size);
1062 }
1063
1064 if (s->CpCmd & CPlusRxChkSum)
1065 {
1066 /* do some packet checksumming */
1067 }
1068
1069 /* write checksum */
1070 val = cpu_to_le32(crc32(0, buf, size_));
1071 pci_dma_write(d, rx_addr+size, (uint8_t *)&val, 4);
1072
1073 /* first segment of received packet flag */
1074 #define CP_RX_STATUS_FS (1<<29)
1075 /* last segment of received packet flag */
1076 #define CP_RX_STATUS_LS (1<<28)
1077 /* multicast packet flag */
1078 #define CP_RX_STATUS_MAR (1<<26)
1079 /* physical-matching packet flag */
1080 #define CP_RX_STATUS_PAM (1<<25)
1081 /* broadcast packet flag */
1082 #define CP_RX_STATUS_BAR (1<<24)
1083 /* runt packet flag */
1084 #define CP_RX_STATUS_RUNT (1<<19)
1085 /* crc error flag */
1086 #define CP_RX_STATUS_CRC (1<<18)
1087 /* IP checksum error flag */
1088 #define CP_RX_STATUS_IPF (1<<15)
1089 /* UDP checksum error flag */
1090 #define CP_RX_STATUS_UDPF (1<<14)
1091 /* TCP checksum error flag */
1092 #define CP_RX_STATUS_TCPF (1<<13)
1093
1094 /* transfer ownership to target */
1095 rxdw0 &= ~CP_RX_OWN;
1096
1097 /* set first segment bit */
1098 rxdw0 |= CP_RX_STATUS_FS;
1099
1100 /* set last segment bit */
1101 rxdw0 |= CP_RX_STATUS_LS;
1102
1103 /* set received packet type flags */
1104 if (packet_header & RxBroadcast)
1105 rxdw0 |= CP_RX_STATUS_BAR;
1106 if (packet_header & RxMulticast)
1107 rxdw0 |= CP_RX_STATUS_MAR;
1108 if (packet_header & RxPhysical)
1109 rxdw0 |= CP_RX_STATUS_PAM;
1110
1111 /* set received size */
1112 rxdw0 &= ~CP_RX_BUFFER_SIZE_MASK;
1113 rxdw0 |= (size+4);
1114
1115 /* update ring data */
1116 val = cpu_to_le32(rxdw0);
1117 pci_dma_write(d, cplus_rx_ring_desc, (uint8_t *)&val, 4);
1118 val = cpu_to_le32(rxdw1);
1119 pci_dma_write(d, cplus_rx_ring_desc+4, (uint8_t *)&val, 4);
1120
1121 /* update tally counter */
1122 ++s->tally_counters.RxOk;
1123
1124 /* seek to next Rx descriptor */
1125 if (rxdw0 & CP_RX_EOR)
1126 {
1127 s->currCPlusRxDesc = 0;
1128 }
1129 else
1130 {
1131 ++s->currCPlusRxDesc;
1132 }
1133
1134 DPRINTF("done C+ Rx mode ----------------\n");
1135
1136 }
1137 else
1138 {
1139 DPRINTF("in ring Rx mode ================\n");
1140
1141 /* begin ring receiver mode */
1142 int avail = MOD2(s->RxBufferSize + s->RxBufPtr - s->RxBufAddr, s->RxBufferSize);
1143
1144 /* if receiver buffer is empty then avail == 0 */
1145
1146 #define RX_ALIGN(x) (((x) + 3) & ~0x3)
1147
1148 if (avail != 0 && RX_ALIGN(size + 8) >= avail)
1149 {
1150 DPRINTF("rx overflow: rx buffer length %d head 0x%04x "
1151 "read 0x%04x === available 0x%04x need 0x%04zx\n",
1152 s->RxBufferSize, s->RxBufAddr, s->RxBufPtr, avail, size + 8);
1153
1154 s->IntrStatus |= RxOverflow;
1155 ++s->RxMissed;
1156 rtl8139_update_irq(s);
1157 return 0;
1158 }
1159
1160 packet_header |= RxStatusOK;
1161
1162 packet_header |= (((size+4) << 16) & 0xffff0000);
1163
1164 /* write header */
1165 uint32_t val = cpu_to_le32(packet_header);
1166
1167 rtl8139_write_buffer(s, (uint8_t *)&val, 4);
1168
1169 rtl8139_write_buffer(s, buf, size);
1170
1171 /* write checksum */
1172 val = cpu_to_le32(crc32(0, buf, size));
1173 rtl8139_write_buffer(s, (uint8_t *)&val, 4);
1174
1175 /* correct buffer write pointer */
1176 s->RxBufAddr = MOD2(RX_ALIGN(s->RxBufAddr), s->RxBufferSize);
1177
1178 /* now we can signal we have received something */
1179
1180 DPRINTF("received: rx buffer length %d head 0x%04x read 0x%04x\n",
1181 s->RxBufferSize, s->RxBufAddr, s->RxBufPtr);
1182 }
1183
1184 s->IntrStatus |= RxOK;
1185
1186 if (do_interrupt)
1187 {
1188 rtl8139_update_irq(s);
1189 }
1190
1191 return size_;
1192 }
1193
1194 static ssize_t rtl8139_receive(NetClientState *nc, const uint8_t *buf, size_t size)
1195 {
1196 return rtl8139_do_receive(nc, buf, size, 1);
1197 }
1198
1199 static void rtl8139_reset_rxring(RTL8139State *s, uint32_t bufferSize)
1200 {
1201 s->RxBufferSize = bufferSize;
1202 s->RxBufPtr = 0;
1203 s->RxBufAddr = 0;
1204 }
1205
1206 static void rtl8139_reset_phy(RTL8139State *s)
1207 {
1208 s->BasicModeStatus = 0x7809;
1209 s->BasicModeStatus |= 0x0020; /* autonegotiation completed */
1210 /* preserve link state */
1211 s->BasicModeStatus |= qemu_get_queue(s->nic)->link_down ? 0 : 0x04;
1212
1213 s->NWayAdvert = 0x05e1; /* all modes, full duplex */
1214 s->NWayLPAR = 0x05e1; /* all modes, full duplex */
1215 s->NWayExpansion = 0x0001; /* autonegotiation supported */
1216
1217 s->CSCR = CSCR_F_LINK_100 | CSCR_HEART_BIT | CSCR_LD;
1218 }
1219
1220 static void rtl8139_reset(DeviceState *d)
1221 {
1222 RTL8139State *s = RTL8139(d);
1223 int i;
1224
1225 /* restore MAC address */
1226 memcpy(s->phys, s->conf.macaddr.a, 6);
1227 qemu_format_nic_info_str(qemu_get_queue(s->nic), s->phys);
1228
1229 /* reset interrupt mask */
1230 s->IntrStatus = 0;
1231 s->IntrMask = 0;
1232
1233 rtl8139_update_irq(s);
1234
1235 /* mark all status registers as owned by host */
1236 for (i = 0; i < 4; ++i)
1237 {
1238 s->TxStatus[i] = TxHostOwns;
1239 }
1240
1241 s->currTxDesc = 0;
1242 s->currCPlusRxDesc = 0;
1243 s->currCPlusTxDesc = 0;
1244
1245 s->RxRingAddrLO = 0;
1246 s->RxRingAddrHI = 0;
1247
1248 s->RxBuf = 0;
1249
1250 rtl8139_reset_rxring(s, 8192);
1251
1252 /* ACK the reset */
1253 s->TxConfig = 0;
1254
1255 #if 0
1256 // s->TxConfig |= HW_REVID(1, 0, 0, 0, 0, 0, 0); // RTL-8139 HasHltClk
1257 s->clock_enabled = 0;
1258 #else
1259 s->TxConfig |= HW_REVID(1, 1, 1, 0, 1, 1, 0); // RTL-8139C+ HasLWake
1260 s->clock_enabled = 1;
1261 #endif
1262
1263 s->bChipCmdState = CmdReset; /* RxBufEmpty bit is calculated on read from ChipCmd */;
1264
1265 /* set initial state data */
1266 s->Config0 = 0x0; /* No boot ROM */
1267 s->Config1 = 0xC; /* IO mapped and MEM mapped registers available */
1268 s->Config3 = 0x1; /* fast back-to-back compatible */
1269 s->Config5 = 0x0;
1270
1271 s->CpCmd = 0x0; /* reset C+ mode */
1272 s->cplus_enabled = 0;
1273
1274 // s->BasicModeCtrl = 0x3100; // 100Mbps, full duplex, autonegotiation
1275 // s->BasicModeCtrl = 0x2100; // 100Mbps, full duplex
1276 s->BasicModeCtrl = 0x1000; // autonegotiation
1277
1278 rtl8139_reset_phy(s);
1279
1280 /* also reset timer and disable timer interrupt */
1281 s->TCTR = 0;
1282 s->TimerInt = 0;
1283 s->TCTR_base = 0;
1284 rtl8139_set_next_tctr_time(s);
1285
1286 /* reset tally counters */
1287 RTL8139TallyCounters_clear(&s->tally_counters);
1288 }
1289
1290 static void RTL8139TallyCounters_clear(RTL8139TallyCounters* counters)
1291 {
1292 counters->TxOk = 0;
1293 counters->RxOk = 0;
1294 counters->TxERR = 0;
1295 counters->RxERR = 0;
1296 counters->MissPkt = 0;
1297 counters->FAE = 0;
1298 counters->Tx1Col = 0;
1299 counters->TxMCol = 0;
1300 counters->RxOkPhy = 0;
1301 counters->RxOkBrd = 0;
1302 counters->RxOkMul = 0;
1303 counters->TxAbt = 0;
1304 counters->TxUndrn = 0;
1305 }
1306
1307 static void RTL8139TallyCounters_dma_write(RTL8139State *s, dma_addr_t tc_addr)
1308 {
1309 PCIDevice *d = PCI_DEVICE(s);
1310 RTL8139TallyCounters *tally_counters = &s->tally_counters;
1311 uint16_t val16;
1312 uint32_t val32;
1313 uint64_t val64;
1314
1315 val64 = cpu_to_le64(tally_counters->TxOk);
1316 pci_dma_write(d, tc_addr + 0, (uint8_t *)&val64, 8);
1317
1318 val64 = cpu_to_le64(tally_counters->RxOk);
1319 pci_dma_write(d, tc_addr + 8, (uint8_t *)&val64, 8);
1320
1321 val64 = cpu_to_le64(tally_counters->TxERR);
1322 pci_dma_write(d, tc_addr + 16, (uint8_t *)&val64, 8);
1323
1324 val32 = cpu_to_le32(tally_counters->RxERR);
1325 pci_dma_write(d, tc_addr + 24, (uint8_t *)&val32, 4);
1326
1327 val16 = cpu_to_le16(tally_counters->MissPkt);
1328 pci_dma_write(d, tc_addr + 28, (uint8_t *)&val16, 2);
1329
1330 val16 = cpu_to_le16(tally_counters->FAE);
1331 pci_dma_write(d, tc_addr + 30, (uint8_t *)&val16, 2);
1332
1333 val32 = cpu_to_le32(tally_counters->Tx1Col);
1334 pci_dma_write(d, tc_addr + 32, (uint8_t *)&val32, 4);
1335
1336 val32 = cpu_to_le32(tally_counters->TxMCol);
1337 pci_dma_write(d, tc_addr + 36, (uint8_t *)&val32, 4);
1338
1339 val64 = cpu_to_le64(tally_counters->RxOkPhy);
1340 pci_dma_write(d, tc_addr + 40, (uint8_t *)&val64, 8);
1341
1342 val64 = cpu_to_le64(tally_counters->RxOkBrd);
1343 pci_dma_write(d, tc_addr + 48, (uint8_t *)&val64, 8);
1344
1345 val32 = cpu_to_le32(tally_counters->RxOkMul);
1346 pci_dma_write(d, tc_addr + 56, (uint8_t *)&val32, 4);
1347
1348 val16 = cpu_to_le16(tally_counters->TxAbt);
1349 pci_dma_write(d, tc_addr + 60, (uint8_t *)&val16, 2);
1350
1351 val16 = cpu_to_le16(tally_counters->TxUndrn);
1352 pci_dma_write(d, tc_addr + 62, (uint8_t *)&val16, 2);
1353 }
1354
1355 static void rtl8139_ChipCmd_write(RTL8139State *s, uint32_t val)
1356 {
1357 DeviceState *d = DEVICE(s);
1358
1359 val &= 0xff;
1360
1361 DPRINTF("ChipCmd write val=0x%08x\n", val);
1362
1363 if (val & CmdReset)
1364 {
1365 DPRINTF("ChipCmd reset\n");
1366 rtl8139_reset(d);
1367 }
1368 if (val & CmdRxEnb)
1369 {
1370 DPRINTF("ChipCmd enable receiver\n");
1371
1372 s->currCPlusRxDesc = 0;
1373 }
1374 if (val & CmdTxEnb)
1375 {
1376 DPRINTF("ChipCmd enable transmitter\n");
1377
1378 s->currCPlusTxDesc = 0;
1379 }
1380
1381 /* mask unwritable bits */
1382 val = SET_MASKED(val, 0xe3, s->bChipCmdState);
1383
1384 /* Deassert reset pin before next read */
1385 val &= ~CmdReset;
1386
1387 s->bChipCmdState = val;
1388 }
1389
1390 static int rtl8139_RxBufferEmpty(RTL8139State *s)
1391 {
1392 int unread = MOD2(s->RxBufferSize + s->RxBufAddr - s->RxBufPtr, s->RxBufferSize);
1393
1394 if (unread != 0)
1395 {
1396 DPRINTF("receiver buffer data available 0x%04x\n", unread);
1397 return 0;
1398 }
1399
1400 DPRINTF("receiver buffer is empty\n");
1401
1402 return 1;
1403 }
1404
1405 static uint32_t rtl8139_ChipCmd_read(RTL8139State *s)
1406 {
1407 uint32_t ret = s->bChipCmdState;
1408
1409 if (rtl8139_RxBufferEmpty(s))
1410 ret |= RxBufEmpty;
1411
1412 DPRINTF("ChipCmd read val=0x%04x\n", ret);
1413
1414 return ret;
1415 }
1416
1417 static void rtl8139_CpCmd_write(RTL8139State *s, uint32_t val)
1418 {
1419 val &= 0xffff;
1420
1421 DPRINTF("C+ command register write(w) val=0x%04x\n", val);
1422
1423 s->cplus_enabled = 1;
1424
1425 /* mask unwritable bits */
1426 val = SET_MASKED(val, 0xff84, s->CpCmd);
1427
1428 s->CpCmd = val;
1429 }
1430
1431 static uint32_t rtl8139_CpCmd_read(RTL8139State *s)
1432 {
1433 uint32_t ret = s->CpCmd;
1434
1435 DPRINTF("C+ command register read(w) val=0x%04x\n", ret);
1436
1437 return ret;
1438 }
1439
1440 static void rtl8139_IntrMitigate_write(RTL8139State *s, uint32_t val)
1441 {
1442 DPRINTF("C+ IntrMitigate register write(w) val=0x%04x\n", val);
1443 }
1444
1445 static uint32_t rtl8139_IntrMitigate_read(RTL8139State *s)
1446 {
1447 uint32_t ret = 0;
1448
1449 DPRINTF("C+ IntrMitigate register read(w) val=0x%04x\n", ret);
1450
1451 return ret;
1452 }
1453
1454 static int rtl8139_config_writable(RTL8139State *s)
1455 {
1456 if ((s->Cfg9346 & Chip9346_op_mask) == Cfg9346_ConfigWrite)
1457 {
1458 return 1;
1459 }
1460
1461 DPRINTF("Configuration registers are write-protected\n");
1462
1463 return 0;
1464 }
1465
1466 static void rtl8139_BasicModeCtrl_write(RTL8139State *s, uint32_t val)
1467 {
1468 val &= 0xffff;
1469
1470 DPRINTF("BasicModeCtrl register write(w) val=0x%04x\n", val);
1471
1472 /* mask unwritable bits */
1473 uint32_t mask = 0xccff;
1474
1475 if (1 || !rtl8139_config_writable(s))
1476 {
1477 /* Speed setting and autonegotiation enable bits are read-only */
1478 mask |= 0x3000;
1479 /* Duplex mode setting is read-only */
1480 mask |= 0x0100;
1481 }
1482
1483 if (val & 0x8000) {
1484 /* Reset PHY */
1485 rtl8139_reset_phy(s);
1486 }
1487
1488 val = SET_MASKED(val, mask, s->BasicModeCtrl);
1489
1490 s->BasicModeCtrl = val;
1491 }
1492
1493 static uint32_t rtl8139_BasicModeCtrl_read(RTL8139State *s)
1494 {
1495 uint32_t ret = s->BasicModeCtrl;
1496
1497 DPRINTF("BasicModeCtrl register read(w) val=0x%04x\n", ret);
1498
1499 return ret;
1500 }
1501
1502 static void rtl8139_BasicModeStatus_write(RTL8139State *s, uint32_t val)
1503 {
1504 val &= 0xffff;
1505
1506 DPRINTF("BasicModeStatus register write(w) val=0x%04x\n", val);
1507
1508 /* mask unwritable bits */
1509 val = SET_MASKED(val, 0xff3f, s->BasicModeStatus);
1510
1511 s->BasicModeStatus = val;
1512 }
1513
1514 static uint32_t rtl8139_BasicModeStatus_read(RTL8139State *s)
1515 {
1516 uint32_t ret = s->BasicModeStatus;
1517
1518 DPRINTF("BasicModeStatus register read(w) val=0x%04x\n", ret);
1519
1520 return ret;
1521 }
1522
1523 static void rtl8139_Cfg9346_write(RTL8139State *s, uint32_t val)
1524 {
1525 DeviceState *d = DEVICE(s);
1526
1527 val &= 0xff;
1528
1529 DPRINTF("Cfg9346 write val=0x%02x\n", val);
1530
1531 /* mask unwritable bits */
1532 val = SET_MASKED(val, 0x31, s->Cfg9346);
1533
1534 uint32_t opmode = val & 0xc0;
1535 uint32_t eeprom_val = val & 0xf;
1536
1537 if (opmode == 0x80) {
1538 /* eeprom access */
1539 int eecs = (eeprom_val & 0x08)?1:0;
1540 int eesk = (eeprom_val & 0x04)?1:0;
1541 int eedi = (eeprom_val & 0x02)?1:0;
1542 prom9346_set_wire(s, eecs, eesk, eedi);
1543 } else if (opmode == 0x40) {
1544 /* Reset. */
1545 val = 0;
1546 rtl8139_reset(d);
1547 }
1548
1549 s->Cfg9346 = val;
1550 }
1551
1552 static uint32_t rtl8139_Cfg9346_read(RTL8139State *s)
1553 {
1554 uint32_t ret = s->Cfg9346;
1555
1556 uint32_t opmode = ret & 0xc0;
1557
1558 if (opmode == 0x80)
1559 {
1560 /* eeprom access */
1561 int eedo = prom9346_get_wire(s);
1562 if (eedo)
1563 {
1564 ret |= 0x01;
1565 }
1566 else
1567 {
1568 ret &= ~0x01;
1569 }
1570 }
1571
1572 DPRINTF("Cfg9346 read val=0x%02x\n", ret);
1573
1574 return ret;
1575 }
1576
1577 static void rtl8139_Config0_write(RTL8139State *s, uint32_t val)
1578 {
1579 val &= 0xff;
1580
1581 DPRINTF("Config0 write val=0x%02x\n", val);
1582
1583 if (!rtl8139_config_writable(s)) {
1584 return;
1585 }
1586
1587 /* mask unwritable bits */
1588 val = SET_MASKED(val, 0xf8, s->Config0);
1589
1590 s->Config0 = val;
1591 }
1592
1593 static uint32_t rtl8139_Config0_read(RTL8139State *s)
1594 {
1595 uint32_t ret = s->Config0;
1596
1597 DPRINTF("Config0 read val=0x%02x\n", ret);
1598
1599 return ret;
1600 }
1601
1602 static void rtl8139_Config1_write(RTL8139State *s, uint32_t val)
1603 {
1604 val &= 0xff;
1605
1606 DPRINTF("Config1 write val=0x%02x\n", val);
1607
1608 if (!rtl8139_config_writable(s)) {
1609 return;
1610 }
1611
1612 /* mask unwritable bits */
1613 val = SET_MASKED(val, 0xC, s->Config1);
1614
1615 s->Config1 = val;
1616 }
1617
1618 static uint32_t rtl8139_Config1_read(RTL8139State *s)
1619 {
1620 uint32_t ret = s->Config1;
1621
1622 DPRINTF("Config1 read val=0x%02x\n", ret);
1623
1624 return ret;
1625 }
1626
1627 static void rtl8139_Config3_write(RTL8139State *s, uint32_t val)
1628 {
1629 val &= 0xff;
1630
1631 DPRINTF("Config3 write val=0x%02x\n", val);
1632
1633 if (!rtl8139_config_writable(s)) {
1634 return;
1635 }
1636
1637 /* mask unwritable bits */
1638 val = SET_MASKED(val, 0x8F, s->Config3);
1639
1640 s->Config3 = val;
1641 }
1642
1643 static uint32_t rtl8139_Config3_read(RTL8139State *s)
1644 {
1645 uint32_t ret = s->Config3;
1646
1647 DPRINTF("Config3 read val=0x%02x\n", ret);
1648
1649 return ret;
1650 }
1651
1652 static void rtl8139_Config4_write(RTL8139State *s, uint32_t val)
1653 {
1654 val &= 0xff;
1655
1656 DPRINTF("Config4 write val=0x%02x\n", val);
1657
1658 if (!rtl8139_config_writable(s)) {
1659 return;
1660 }
1661
1662 /* mask unwritable bits */
1663 val = SET_MASKED(val, 0x0a, s->Config4);
1664
1665 s->Config4 = val;
1666 }
1667
1668 static uint32_t rtl8139_Config4_read(RTL8139State *s)
1669 {
1670 uint32_t ret = s->Config4;
1671
1672 DPRINTF("Config4 read val=0x%02x\n", ret);
1673
1674 return ret;
1675 }
1676
1677 static void rtl8139_Config5_write(RTL8139State *s, uint32_t val)
1678 {
1679 val &= 0xff;
1680
1681 DPRINTF("Config5 write val=0x%02x\n", val);
1682
1683 /* mask unwritable bits */
1684 val = SET_MASKED(val, 0x80, s->Config5);
1685
1686 s->Config5 = val;
1687 }
1688
1689 static uint32_t rtl8139_Config5_read(RTL8139State *s)
1690 {
1691 uint32_t ret = s->Config5;
1692
1693 DPRINTF("Config5 read val=0x%02x\n", ret);
1694
1695 return ret;
1696 }
1697
1698 static void rtl8139_TxConfig_write(RTL8139State *s, uint32_t val)
1699 {
1700 if (!rtl8139_transmitter_enabled(s))
1701 {
1702 DPRINTF("transmitter disabled; no TxConfig write val=0x%08x\n", val);
1703 return;
1704 }
1705
1706 DPRINTF("TxConfig write val=0x%08x\n", val);
1707
1708 val = SET_MASKED(val, TxVersionMask | 0x8070f80f, s->TxConfig);
1709
1710 s->TxConfig = val;
1711 }
1712
1713 static void rtl8139_TxConfig_writeb(RTL8139State *s, uint32_t val)
1714 {
1715 DPRINTF("RTL8139C TxConfig via write(b) val=0x%02x\n", val);
1716
1717 uint32_t tc = s->TxConfig;
1718 tc &= 0xFFFFFF00;
1719 tc |= (val & 0x000000FF);
1720 rtl8139_TxConfig_write(s, tc);
1721 }
1722
1723 static uint32_t rtl8139_TxConfig_read(RTL8139State *s)
1724 {
1725 uint32_t ret = s->TxConfig;
1726
1727 DPRINTF("TxConfig read val=0x%04x\n", ret);
1728
1729 return ret;
1730 }
1731
1732 static void rtl8139_RxConfig_write(RTL8139State *s, uint32_t val)
1733 {
1734 DPRINTF("RxConfig write val=0x%08x\n", val);
1735
1736 /* mask unwritable bits */
1737 val = SET_MASKED(val, 0xf0fc0040, s->RxConfig);
1738
1739 s->RxConfig = val;
1740
1741 /* reset buffer size and read/write pointers */
1742 rtl8139_reset_rxring(s, 8192 << ((s->RxConfig >> 11) & 0x3));
1743
1744 DPRINTF("RxConfig write reset buffer size to %d\n", s->RxBufferSize);
1745 }
1746
1747 static uint32_t rtl8139_RxConfig_read(RTL8139State *s)
1748 {
1749 uint32_t ret = s->RxConfig;
1750
1751 DPRINTF("RxConfig read val=0x%08x\n", ret);
1752
1753 return ret;
1754 }
1755
1756 static void rtl8139_transfer_frame(RTL8139State *s, uint8_t *buf, int size,
1757 int do_interrupt, const uint8_t *dot1q_buf)
1758 {
1759 struct iovec *iov = NULL;
1760 struct iovec vlan_iov[3];
1761
1762 if (!size)
1763 {
1764 DPRINTF("+++ empty ethernet frame\n");
1765 return;
1766 }
1767
1768 if (dot1q_buf && size >= ETH_ALEN * 2) {
1769 iov = (struct iovec[3]) {
1770 { .iov_base = buf, .iov_len = ETH_ALEN * 2 },
1771 { .iov_base = (void *) dot1q_buf, .iov_len = VLAN_HLEN },
1772 { .iov_base = buf + ETH_ALEN * 2,
1773 .iov_len = size - ETH_ALEN * 2 },
1774 };
1775
1776 memcpy(vlan_iov, iov, sizeof(vlan_iov));
1777 iov = vlan_iov;
1778 }
1779
1780 if (TxLoopBack == (s->TxConfig & TxLoopBack))
1781 {
1782 size_t buf2_size;
1783 uint8_t *buf2;
1784
1785 if (iov) {
1786 buf2_size = iov_size(iov, 3);
1787 buf2 = g_malloc(buf2_size);
1788 iov_to_buf(iov, 3, 0, buf2, buf2_size);
1789 buf = buf2;
1790 }
1791
1792 DPRINTF("+++ transmit loopback mode\n");
1793 rtl8139_do_receive(qemu_get_queue(s->nic), buf, size, do_interrupt);
1794
1795 if (iov) {
1796 g_free(buf2);
1797 }
1798 }
1799 else
1800 {
1801 if (iov) {
1802 qemu_sendv_packet(qemu_get_queue(s->nic), iov, 3);
1803 } else {
1804 qemu_send_packet(qemu_get_queue(s->nic), buf, size);
1805 }
1806 }
1807 }
1808
1809 static int rtl8139_transmit_one(RTL8139State *s, int descriptor)
1810 {
1811 if (!rtl8139_transmitter_enabled(s))
1812 {
1813 DPRINTF("+++ cannot transmit from descriptor %d: transmitter "
1814 "disabled\n", descriptor);
1815 return 0;
1816 }
1817
1818 if (s->TxStatus[descriptor] & TxHostOwns)
1819 {
1820 DPRINTF("+++ cannot transmit from descriptor %d: owned by host "
1821 "(%08x)\n", descriptor, s->TxStatus[descriptor]);
1822 return 0;
1823 }
1824
1825 DPRINTF("+++ transmitting from descriptor %d\n", descriptor);
1826
1827 PCIDevice *d = PCI_DEVICE(s);
1828 int txsize = s->TxStatus[descriptor] & 0x1fff;
1829 uint8_t txbuffer[0x2000];
1830
1831 DPRINTF("+++ transmit reading %d bytes from host memory at 0x%08x\n",
1832 txsize, s->TxAddr[descriptor]);
1833
1834 pci_dma_read(d, s->TxAddr[descriptor], txbuffer, txsize);
1835
1836 /* Mark descriptor as transferred */
1837 s->TxStatus[descriptor] |= TxHostOwns;
1838 s->TxStatus[descriptor] |= TxStatOK;
1839
1840 rtl8139_transfer_frame(s, txbuffer, txsize, 0, NULL);
1841
1842 DPRINTF("+++ transmitted %d bytes from descriptor %d\n", txsize,
1843 descriptor);
1844
1845 /* update interrupt */
1846 s->IntrStatus |= TxOK;
1847 rtl8139_update_irq(s);
1848
1849 return 1;
1850 }
1851
1852 #define TCP_HEADER_CLEAR_FLAGS(tcp, off) ((tcp)->th_offset_flags &= cpu_to_be16(~TCP_FLAGS_ONLY(off)))
1853
1854 /* produces ones' complement sum of data */
1855 static uint16_t ones_complement_sum(uint8_t *data, size_t len)
1856 {
1857 uint32_t result = 0;
1858
1859 for (; len > 1; data+=2, len-=2)
1860 {
1861 result += *(uint16_t*)data;
1862 }
1863
1864 /* add the remainder byte */
1865 if (len)
1866 {
1867 uint8_t odd[2] = {*data, 0};
1868 result += *(uint16_t*)odd;
1869 }
1870
1871 while (result>>16)
1872 result = (result & 0xffff) + (result >> 16);
1873
1874 return result;
1875 }
1876
1877 static uint16_t ip_checksum(void *data, size_t len)
1878 {
1879 return ~ones_complement_sum((uint8_t*)data, len);
1880 }
1881
1882 static int rtl8139_cplus_transmit_one(RTL8139State *s)
1883 {
1884 if (!rtl8139_transmitter_enabled(s))
1885 {
1886 DPRINTF("+++ C+ mode: transmitter disabled\n");
1887 return 0;
1888 }
1889
1890 if (!rtl8139_cp_transmitter_enabled(s))
1891 {
1892 DPRINTF("+++ C+ mode: C+ transmitter disabled\n");
1893 return 0 ;
1894 }
1895
1896 PCIDevice *d = PCI_DEVICE(s);
1897 int descriptor = s->currCPlusTxDesc;
1898
1899 dma_addr_t cplus_tx_ring_desc = rtl8139_addr64(s->TxAddr[0], s->TxAddr[1]);
1900
1901 /* Normal priority ring */
1902 cplus_tx_ring_desc += 16 * descriptor;
1903
1904 DPRINTF("+++ C+ mode reading TX descriptor %d from host memory at "
1905 "%08x %08x = 0x"DMA_ADDR_FMT"\n", descriptor, s->TxAddr[1],
1906 s->TxAddr[0], cplus_tx_ring_desc);
1907
1908 uint32_t val, txdw0,txdw1,txbufLO,txbufHI;
1909
1910 pci_dma_read(d, cplus_tx_ring_desc, (uint8_t *)&val, 4);
1911 txdw0 = le32_to_cpu(val);
1912 pci_dma_read(d, cplus_tx_ring_desc+4, (uint8_t *)&val, 4);
1913 txdw1 = le32_to_cpu(val);
1914 pci_dma_read(d, cplus_tx_ring_desc+8, (uint8_t *)&val, 4);
1915 txbufLO = le32_to_cpu(val);
1916 pci_dma_read(d, cplus_tx_ring_desc+12, (uint8_t *)&val, 4);
1917 txbufHI = le32_to_cpu(val);
1918
1919 DPRINTF("+++ C+ mode TX descriptor %d %08x %08x %08x %08x\n", descriptor,
1920 txdw0, txdw1, txbufLO, txbufHI);
1921
1922 /* w0 ownership flag */
1923 #define CP_TX_OWN (1<<31)
1924 /* w0 end of ring flag */
1925 #define CP_TX_EOR (1<<30)
1926 /* first segment of received packet flag */
1927 #define CP_TX_FS (1<<29)
1928 /* last segment of received packet flag */
1929 #define CP_TX_LS (1<<28)
1930 /* large send packet flag */
1931 #define CP_TX_LGSEN (1<<27)
1932 /* large send MSS mask, bits 16...25 */
1933 #define CP_TC_LGSEN_MSS_MASK ((1 << 12) - 1)
1934
1935 /* IP checksum offload flag */
1936 #define CP_TX_IPCS (1<<18)
1937 /* UDP checksum offload flag */
1938 #define CP_TX_UDPCS (1<<17)
1939 /* TCP checksum offload flag */
1940 #define CP_TX_TCPCS (1<<16)
1941
1942 /* w0 bits 0...15 : buffer size */
1943 #define CP_TX_BUFFER_SIZE (1<<16)
1944 #define CP_TX_BUFFER_SIZE_MASK (CP_TX_BUFFER_SIZE - 1)
1945 /* w1 add tag flag */
1946 #define CP_TX_TAGC (1<<17)
1947 /* w1 bits 0...15 : VLAN tag (big endian) */
1948 #define CP_TX_VLAN_TAG_MASK ((1<<16) - 1)
1949 /* w2 low 32bit of Rx buffer ptr */
1950 /* w3 high 32bit of Rx buffer ptr */
1951
1952 /* set after transmission */
1953 /* FIFO underrun flag */
1954 #define CP_TX_STATUS_UNF (1<<25)
1955 /* transmit error summary flag, valid if set any of three below */
1956 #define CP_TX_STATUS_TES (1<<23)
1957 /* out-of-window collision flag */
1958 #define CP_TX_STATUS_OWC (1<<22)
1959 /* link failure flag */
1960 #define CP_TX_STATUS_LNKF (1<<21)
1961 /* excessive collisions flag */
1962 #define CP_TX_STATUS_EXC (1<<20)
1963
1964 if (!(txdw0 & CP_TX_OWN))
1965 {
1966 DPRINTF("C+ Tx mode : descriptor %d is owned by host\n", descriptor);
1967 return 0 ;
1968 }
1969
1970 DPRINTF("+++ C+ Tx mode : transmitting from descriptor %d\n", descriptor);
1971
1972 if (txdw0 & CP_TX_FS)
1973 {
1974 DPRINTF("+++ C+ Tx mode : descriptor %d is first segment "
1975 "descriptor\n", descriptor);
1976
1977 /* reset internal buffer offset */
1978 s->cplus_txbuffer_offset = 0;
1979 }
1980
1981 int txsize = txdw0 & CP_TX_BUFFER_SIZE_MASK;
1982 dma_addr_t tx_addr = rtl8139_addr64(txbufLO, txbufHI);
1983
1984 /* make sure we have enough space to assemble the packet */
1985 if (!s->cplus_txbuffer)
1986 {
1987 s->cplus_txbuffer_len = CP_TX_BUFFER_SIZE;
1988 s->cplus_txbuffer = g_malloc(s->cplus_txbuffer_len);
1989 s->cplus_txbuffer_offset = 0;
1990
1991 DPRINTF("+++ C+ mode transmission buffer allocated space %d\n",
1992 s->cplus_txbuffer_len);
1993 }
1994
1995 if (s->cplus_txbuffer_offset + txsize >= s->cplus_txbuffer_len)
1996 {
1997 /* The spec didn't tell the maximum size, stick to CP_TX_BUFFER_SIZE */
1998 txsize = s->cplus_txbuffer_len - s->cplus_txbuffer_offset;
1999 DPRINTF("+++ C+ mode transmission buffer overrun, truncated descriptor"
2000 "length to %d\n", txsize);
2001 }
2002
2003 /* append more data to the packet */
2004
2005 DPRINTF("+++ C+ mode transmit reading %d bytes from host memory at "
2006 DMA_ADDR_FMT" to offset %d\n", txsize, tx_addr,
2007 s->cplus_txbuffer_offset);
2008
2009 pci_dma_read(d, tx_addr,
2010 s->cplus_txbuffer + s->cplus_txbuffer_offset, txsize);
2011 s->cplus_txbuffer_offset += txsize;
2012
2013 /* seek to next Rx descriptor */
2014 if (txdw0 & CP_TX_EOR)
2015 {
2016 s->currCPlusTxDesc = 0;
2017 }
2018 else
2019 {
2020 ++s->currCPlusTxDesc;
2021 if (s->currCPlusTxDesc >= 64)
2022 s->currCPlusTxDesc = 0;
2023 }
2024
2025 /* transfer ownership to target */
2026 txdw0 &= ~CP_TX_OWN;
2027
2028 /* reset error indicator bits */
2029 txdw0 &= ~CP_TX_STATUS_UNF;
2030 txdw0 &= ~CP_TX_STATUS_TES;
2031 txdw0 &= ~CP_TX_STATUS_OWC;
2032 txdw0 &= ~CP_TX_STATUS_LNKF;
2033 txdw0 &= ~CP_TX_STATUS_EXC;
2034
2035 /* update ring data */
2036 val = cpu_to_le32(txdw0);
2037 pci_dma_write(d, cplus_tx_ring_desc, (uint8_t *)&val, 4);
2038
2039 /* Now decide if descriptor being processed is holding the last segment of packet */
2040 if (txdw0 & CP_TX_LS)
2041 {
2042 uint8_t dot1q_buffer_space[VLAN_HLEN];
2043 uint16_t *dot1q_buffer;
2044
2045 DPRINTF("+++ C+ Tx mode : descriptor %d is last segment descriptor\n",
2046 descriptor);
2047
2048 /* can transfer fully assembled packet */
2049
2050 uint8_t *saved_buffer = s->cplus_txbuffer;
2051 int saved_size = s->cplus_txbuffer_offset;
2052 int saved_buffer_len = s->cplus_txbuffer_len;
2053
2054 /* create vlan tag */
2055 if (txdw1 & CP_TX_TAGC) {
2056 /* the vlan tag is in BE byte order in the descriptor
2057 * BE + le_to_cpu() + ~swap()~ = cpu */
2058 DPRINTF("+++ C+ Tx mode : inserting vlan tag with ""tci: %u\n",
2059 bswap16(txdw1 & CP_TX_VLAN_TAG_MASK));
2060
2061 dot1q_buffer = (uint16_t *) dot1q_buffer_space;
2062 dot1q_buffer[0] = cpu_to_be16(ETH_P_VLAN);
2063 /* BE + le_to_cpu() + ~cpu_to_le()~ = BE */
2064 dot1q_buffer[1] = cpu_to_le16(txdw1 & CP_TX_VLAN_TAG_MASK);
2065 } else {
2066 dot1q_buffer = NULL;
2067 }
2068
2069 /* reset the card space to protect from recursive call */
2070 s->cplus_txbuffer = NULL;
2071 s->cplus_txbuffer_offset = 0;
2072 s->cplus_txbuffer_len = 0;
2073
2074 if (txdw0 & (CP_TX_IPCS | CP_TX_UDPCS | CP_TX_TCPCS | CP_TX_LGSEN))
2075 {
2076 DPRINTF("+++ C+ mode offloaded task checksum\n");
2077
2078 /* Large enough for Ethernet and IP headers? */
2079 if (saved_size < ETH_HLEN + sizeof(struct ip_header)) {
2080 goto skip_offload;
2081 }
2082
2083 /* ip packet header */
2084 struct ip_header *ip = NULL;
2085 int hlen = 0;
2086 uint8_t ip_protocol = 0;
2087 uint16_t ip_data_len = 0;
2088
2089 uint8_t *eth_payload_data = NULL;
2090 size_t eth_payload_len = 0;
2091
2092 int proto = be16_to_cpu(*(uint16_t *)(saved_buffer + 12));
2093 if (proto != ETH_P_IP)
2094 {
2095 goto skip_offload;
2096 }
2097
2098 DPRINTF("+++ C+ mode has IP packet\n");
2099
2100 /* Note on memory alignment: eth_payload_data is 16-bit aligned
2101 * since saved_buffer is allocated with g_malloc() and ETH_HLEN is
2102 * even. 32-bit accesses must use ldl/stl wrappers to avoid
2103 * unaligned accesses.
2104 */
2105 eth_payload_data = saved_buffer + ETH_HLEN;
2106 eth_payload_len = saved_size - ETH_HLEN;
2107
2108 ip = (struct ip_header*)eth_payload_data;
2109
2110 if (IP_HEADER_VERSION(ip) != IP_HEADER_VERSION_4) {
2111 DPRINTF("+++ C+ mode packet has bad IP version %d "
2112 "expected %d\n", IP_HEADER_VERSION(ip),
2113 IP_HEADER_VERSION_4);
2114 goto skip_offload;
2115 }
2116
2117 hlen = IP_HDR_GET_LEN(ip);
2118 if (hlen < sizeof(struct ip_header) || hlen > eth_payload_len) {
2119 goto skip_offload;
2120 }
2121
2122 ip_protocol = ip->ip_p;
2123
2124 ip_data_len = be16_to_cpu(ip->ip_len);
2125 if (ip_data_len < hlen || ip_data_len > eth_payload_len) {
2126 goto skip_offload;
2127 }
2128 ip_data_len -= hlen;
2129
2130 if (txdw0 & CP_TX_IPCS)
2131 {
2132 DPRINTF("+++ C+ mode need IP checksum\n");
2133
2134 ip->ip_sum = 0;
2135 ip->ip_sum = ip_checksum(ip, hlen);
2136 DPRINTF("+++ C+ mode IP header len=%d checksum=%04x\n",
2137 hlen, ip->ip_sum);
2138 }
2139
2140 if ((txdw0 & CP_TX_LGSEN) && ip_protocol == IP_PROTO_TCP)
2141 {
2142 /* Large enough for the TCP header? */
2143 if (ip_data_len < sizeof(tcp_header)) {
2144 goto skip_offload;
2145 }
2146
2147 int large_send_mss = (txdw0 >> 16) & CP_TC_LGSEN_MSS_MASK;
2148
2149 DPRINTF("+++ C+ mode offloaded task TSO MTU=%d IP data %d "
2150 "frame data %d specified MSS=%d\n", ETH_MTU,
2151 ip_data_len, saved_size - ETH_HLEN, large_send_mss);
2152
2153 int tcp_send_offset = 0;
2154 int send_count = 0;
2155
2156 /* maximum IP header length is 60 bytes */
2157 uint8_t saved_ip_header[60];
2158
2159 /* save IP header template; data area is used in tcp checksum calculation */
2160 memcpy(saved_ip_header, eth_payload_data, hlen);
2161
2162 /* a placeholder for checksum calculation routine in tcp case */
2163 uint8_t *data_to_checksum = eth_payload_data + hlen - 12;
2164 // size_t data_to_checksum_len = eth_payload_len - hlen + 12;
2165
2166 /* pointer to TCP header */
2167 tcp_header *p_tcp_hdr = (tcp_header*)(eth_payload_data + hlen);
2168
2169 int tcp_hlen = TCP_HEADER_DATA_OFFSET(p_tcp_hdr);
2170
2171 /* Invalid TCP data offset? */
2172 if (tcp_hlen < sizeof(tcp_header) || tcp_hlen > ip_data_len) {
2173 goto skip_offload;
2174 }
2175
2176 /* ETH_MTU = ip header len + tcp header len + payload */
2177 int tcp_data_len = ip_data_len - tcp_hlen;
2178 int tcp_chunk_size = ETH_MTU - hlen - tcp_hlen;
2179
2180 DPRINTF("+++ C+ mode TSO IP data len %d TCP hlen %d TCP "
2181 "data len %d TCP chunk size %d\n", ip_data_len,
2182 tcp_hlen, tcp_data_len, tcp_chunk_size);
2183
2184 /* note the cycle below overwrites IP header data,
2185 but restores it from saved_ip_header before sending packet */
2186
2187 int is_last_frame = 0;
2188
2189 for (tcp_send_offset = 0; tcp_send_offset < tcp_data_len; tcp_send_offset += tcp_chunk_size)
2190 {
2191 uint16_t chunk_size = tcp_chunk_size;
2192
2193 /* check if this is the last frame */
2194 if (tcp_send_offset + tcp_chunk_size >= tcp_data_len)
2195 {
2196 is_last_frame = 1;
2197 chunk_size = tcp_data_len - tcp_send_offset;
2198 }
2199
2200 DPRINTF("+++ C+ mode TSO TCP seqno %08x\n",
2201 ldl_be_p(&p_tcp_hdr->th_seq));
2202
2203 /* add 4 TCP pseudoheader fields */
2204 /* copy IP source and destination fields */
2205 memcpy(data_to_checksum, saved_ip_header + 12, 8);
2206
2207 DPRINTF("+++ C+ mode TSO calculating TCP checksum for "
2208 "packet with %d bytes data\n", tcp_hlen +
2209 chunk_size);
2210
2211 if (tcp_send_offset)
2212 {
2213 memcpy((uint8_t*)p_tcp_hdr + tcp_hlen, (uint8_t*)p_tcp_hdr + tcp_hlen + tcp_send_offset, chunk_size);
2214 }
2215
2216 /* keep PUSH and FIN flags only for the last frame */
2217 if (!is_last_frame)
2218 {
2219 TCP_HEADER_CLEAR_FLAGS(p_tcp_hdr, TH_PUSH | TH_FIN);
2220 }
2221
2222 /* recalculate TCP checksum */
2223 ip_pseudo_header *p_tcpip_hdr = (ip_pseudo_header *)data_to_checksum;
2224 p_tcpip_hdr->zeros = 0;
2225 p_tcpip_hdr->ip_proto = IP_PROTO_TCP;
2226 p_tcpip_hdr->ip_payload = cpu_to_be16(tcp_hlen + chunk_size);
2227
2228 p_tcp_hdr->th_sum = 0;
2229
2230 int tcp_checksum = ip_checksum(data_to_checksum, tcp_hlen + chunk_size + 12);
2231 DPRINTF("+++ C+ mode TSO TCP checksum %04x\n",
2232 tcp_checksum);
2233
2234 p_tcp_hdr->th_sum = tcp_checksum;
2235
2236 /* restore IP header */
2237 memcpy(eth_payload_data, saved_ip_header, hlen);
2238
2239 /* set IP data length and recalculate IP checksum */
2240 ip->ip_len = cpu_to_be16(hlen + tcp_hlen + chunk_size);
2241
2242 /* increment IP id for subsequent frames */
2243 ip->ip_id = cpu_to_be16(tcp_send_offset/tcp_chunk_size + be16_to_cpu(ip->ip_id));
2244
2245 ip->ip_sum = 0;
2246 ip->ip_sum = ip_checksum(eth_payload_data, hlen);
2247 DPRINTF("+++ C+ mode TSO IP header len=%d "
2248 "checksum=%04x\n", hlen, ip->ip_sum);
2249
2250 int tso_send_size = ETH_HLEN + hlen + tcp_hlen + chunk_size;
2251 DPRINTF("+++ C+ mode TSO transferring packet size "
2252 "%d\n", tso_send_size);
2253 rtl8139_transfer_frame(s, saved_buffer, tso_send_size,
2254 0, (uint8_t *) dot1q_buffer);
2255
2256 /* add transferred count to TCP sequence number */
2257 stl_be_p(&p_tcp_hdr->th_seq,
2258 chunk_size + ldl_be_p(&p_tcp_hdr->th_seq));
2259 ++send_count;
2260 }
2261
2262 /* Stop sending this frame */
2263 saved_size = 0;
2264 }
2265 else if (txdw0 & (CP_TX_TCPCS|CP_TX_UDPCS))
2266 {
2267 DPRINTF("+++ C+ mode need TCP or UDP checksum\n");
2268
2269 /* maximum IP header length is 60 bytes */
2270 uint8_t saved_ip_header[60];
2271 memcpy(saved_ip_header, eth_payload_data, hlen);
2272
2273 uint8_t *data_to_checksum = eth_payload_data + hlen - 12;
2274 // size_t data_to_checksum_len = eth_payload_len - hlen + 12;
2275
2276 /* add 4 TCP pseudoheader fields */
2277 /* copy IP source and destination fields */
2278 memcpy(data_to_checksum, saved_ip_header + 12, 8);
2279
2280 if ((txdw0 & CP_TX_TCPCS) && ip_protocol == IP_PROTO_TCP)
2281 {
2282 DPRINTF("+++ C+ mode calculating TCP checksum for "
2283 "packet with %d bytes data\n", ip_data_len);
2284
2285 ip_pseudo_header *p_tcpip_hdr = (ip_pseudo_header *)data_to_checksum;
2286 p_tcpip_hdr->zeros = 0;
2287 p_tcpip_hdr->ip_proto = IP_PROTO_TCP;
2288 p_tcpip_hdr->ip_payload = cpu_to_be16(ip_data_len);
2289
2290 tcp_header* p_tcp_hdr = (tcp_header *) (data_to_checksum+12);
2291
2292 p_tcp_hdr->th_sum = 0;
2293
2294 int tcp_checksum = ip_checksum(data_to_checksum, ip_data_len + 12);
2295 DPRINTF("+++ C+ mode TCP checksum %04x\n",
2296 tcp_checksum);
2297
2298 p_tcp_hdr->th_sum = tcp_checksum;
2299 }
2300 else if ((txdw0 & CP_TX_UDPCS) && ip_protocol == IP_PROTO_UDP)
2301 {
2302 DPRINTF("+++ C+ mode calculating UDP checksum for "
2303 "packet with %d bytes data\n", ip_data_len);
2304
2305 ip_pseudo_header *p_udpip_hdr = (ip_pseudo_header *)data_to_checksum;
2306 p_udpip_hdr->zeros = 0;
2307 p_udpip_hdr->ip_proto = IP_PROTO_UDP;
2308 p_udpip_hdr->ip_payload = cpu_to_be16(ip_data_len);
2309
2310 udp_header *p_udp_hdr = (udp_header *) (data_to_checksum+12);
2311
2312 p_udp_hdr->uh_sum = 0;
2313
2314 int udp_checksum = ip_checksum(data_to_checksum, ip_data_len + 12);
2315 DPRINTF("+++ C+ mode UDP checksum %04x\n",
2316 udp_checksum);
2317
2318 p_udp_hdr->uh_sum = udp_checksum;
2319 }
2320
2321 /* restore IP header */
2322 memcpy(eth_payload_data, saved_ip_header, hlen);
2323 }
2324 }
2325
2326 skip_offload:
2327 /* update tally counter */
2328 ++s->tally_counters.TxOk;
2329
2330 DPRINTF("+++ C+ mode transmitting %d bytes packet\n", saved_size);
2331
2332 rtl8139_transfer_frame(s, saved_buffer, saved_size, 1,
2333 (uint8_t *) dot1q_buffer);
2334
2335 /* restore card space if there was no recursion and reset offset */
2336 if (!s->cplus_txbuffer)
2337 {
2338 s->cplus_txbuffer = saved_buffer;
2339 s->cplus_txbuffer_len = saved_buffer_len;
2340 s->cplus_txbuffer_offset = 0;
2341 }
2342 else
2343 {
2344 g_free(saved_buffer);
2345 }
2346 }
2347 else
2348 {
2349 DPRINTF("+++ C+ mode transmission continue to next descriptor\n");
2350 }
2351
2352 return 1;
2353 }
2354
2355 static void rtl8139_cplus_transmit(RTL8139State *s)
2356 {
2357 int txcount = 0;
2358
2359 while (txcount < 64 && rtl8139_cplus_transmit_one(s))
2360 {
2361 ++txcount;
2362 }
2363
2364 /* Mark transfer completed */
2365 if (!txcount)
2366 {
2367 DPRINTF("C+ mode : transmitter queue stalled, current TxDesc = %d\n",
2368 s->currCPlusTxDesc);
2369 }
2370 else
2371 {
2372 /* update interrupt status */
2373 s->IntrStatus |= TxOK;
2374 rtl8139_update_irq(s);
2375 }
2376 }
2377
2378 static void rtl8139_transmit(RTL8139State *s)
2379 {
2380 int descriptor = s->currTxDesc, txcount = 0;
2381
2382 /*while*/
2383 if (rtl8139_transmit_one(s, descriptor))
2384 {
2385 ++s->currTxDesc;
2386 s->currTxDesc %= 4;
2387 ++txcount;
2388 }
2389
2390 /* Mark transfer completed */
2391 if (!txcount)
2392 {
2393 DPRINTF("transmitter queue stalled, current TxDesc = %d\n",
2394 s->currTxDesc);
2395 }
2396 }
2397
2398 static void rtl8139_TxStatus_write(RTL8139State *s, uint32_t txRegOffset, uint32_t val)
2399 {
2400
2401 int descriptor = txRegOffset/4;
2402
2403 /* handle C+ transmit mode register configuration */
2404
2405 if (s->cplus_enabled)
2406 {
2407 DPRINTF("RTL8139C+ DTCCR write offset=0x%x val=0x%08x "
2408 "descriptor=%d\n", txRegOffset, val, descriptor);
2409
2410 /* handle Dump Tally Counters command */
2411 s->TxStatus[descriptor] = val;
2412
2413 if (descriptor == 0 && (val & 0x8))
2414 {
2415 hwaddr tc_addr = rtl8139_addr64(s->TxStatus[0] & ~0x3f, s->TxStatus[1]);
2416
2417 /* dump tally counters to specified memory location */
2418 RTL8139TallyCounters_dma_write(s, tc_addr);
2419
2420 /* mark dump completed */
2421 s->TxStatus[0] &= ~0x8;
2422 }
2423
2424 return;
2425 }
2426
2427 DPRINTF("TxStatus write offset=0x%x val=0x%08x descriptor=%d\n",
2428 txRegOffset, val, descriptor);
2429
2430 /* mask only reserved bits */
2431 val &= ~0xff00c000; /* these bits are reset on write */
2432 val = SET_MASKED(val, 0x00c00000, s->TxStatus[descriptor]);
2433
2434 s->TxStatus[descriptor] = val;
2435
2436 /* attempt to start transmission */
2437 rtl8139_transmit(s);
2438 }
2439
2440 static uint32_t rtl8139_TxStatus_TxAddr_read(RTL8139State *s, uint32_t regs[],
2441 uint32_t base, uint8_t addr,
2442 int size)
2443 {
2444 uint32_t reg = (addr - base) / 4;
2445 uint32_t offset = addr & 0x3;
2446 uint32_t ret = 0;
2447
2448 if (addr & (size - 1)) {
2449 DPRINTF("not implemented read for TxStatus/TxAddr "
2450 "addr=0x%x size=0x%x\n", addr, size);
2451 return ret;
2452 }
2453
2454 switch (size) {
2455 case 1: /* fall through */
2456 case 2: /* fall through */
2457 case 4:
2458 ret = (regs[reg] >> offset * 8) & (((uint64_t)1 << (size * 8)) - 1);
2459 DPRINTF("TxStatus/TxAddr[%d] read addr=0x%x size=0x%x val=0x%08x\n",
2460 reg, addr, size, ret);
2461 break;
2462 default:
2463 DPRINTF("unsupported size 0x%x of TxStatus/TxAddr reading\n", size);
2464 break;
2465 }
2466
2467 return ret;
2468 }
2469
2470 static uint16_t rtl8139_TSAD_read(RTL8139State *s)
2471 {
2472 uint16_t ret = 0;
2473
2474 /* Simulate TSAD, it is read only anyway */
2475
2476 ret = ((s->TxStatus[3] & TxStatOK )?TSAD_TOK3:0)
2477 |((s->TxStatus[2] & TxStatOK )?TSAD_TOK2:0)
2478 |((s->TxStatus[1] & TxStatOK )?TSAD_TOK1:0)
2479 |((s->TxStatus[0] & TxStatOK )?TSAD_TOK0:0)
2480
2481 |((s->TxStatus[3] & TxUnderrun)?TSAD_TUN3:0)
2482 |((s->TxStatus[2] & TxUnderrun)?TSAD_TUN2:0)
2483 |((s->TxStatus[1] & TxUnderrun)?TSAD_TUN1:0)
2484 |((s->TxStatus[0] & TxUnderrun)?TSAD_TUN0:0)
2485
2486 |((s->TxStatus[3] & TxAborted )?TSAD_TABT3:0)
2487 |((s->TxStatus[2] & TxAborted )?TSAD_TABT2:0)
2488 |((s->TxStatus[1] & TxAborted )?TSAD_TABT1:0)
2489 |((s->TxStatus[0] & TxAborted )?TSAD_TABT0:0)
2490
2491 |((s->TxStatus[3] & TxHostOwns )?TSAD_OWN3:0)
2492 |((s->TxStatus[2] & TxHostOwns )?TSAD_OWN2:0)
2493 |((s->TxStatus[1] & TxHostOwns )?TSAD_OWN1:0)
2494 |((s->TxStatus[0] & TxHostOwns )?TSAD_OWN0:0) ;
2495
2496
2497 DPRINTF("TSAD read val=0x%04x\n", ret);
2498
2499 return ret;
2500 }
2501
2502 static uint16_t rtl8139_CSCR_read(RTL8139State *s)
2503 {
2504 uint16_t ret = s->CSCR;
2505
2506 DPRINTF("CSCR read val=0x%04x\n", ret);
2507
2508 return ret;
2509 }
2510
2511 static void rtl8139_TxAddr_write(RTL8139State *s, uint32_t txAddrOffset, uint32_t val)
2512 {
2513 DPRINTF("TxAddr write offset=0x%x val=0x%08x\n", txAddrOffset, val);
2514
2515 s->TxAddr[txAddrOffset/4] = val;
2516 }
2517
2518 static uint32_t rtl8139_TxAddr_read(RTL8139State *s, uint32_t txAddrOffset)
2519 {
2520 uint32_t ret = s->TxAddr[txAddrOffset/4];
2521
2522 DPRINTF("TxAddr read offset=0x%x val=0x%08x\n", txAddrOffset, ret);
2523
2524 return ret;
2525 }
2526
2527 static void rtl8139_RxBufPtr_write(RTL8139State *s, uint32_t val)
2528 {
2529 DPRINTF("RxBufPtr write val=0x%04x\n", val);
2530
2531 /* this value is off by 16 */
2532 s->RxBufPtr = MOD2(val + 0x10, s->RxBufferSize);
2533
2534 /* more buffer space may be available so try to receive */
2535 qemu_flush_queued_packets(qemu_get_queue(s->nic));
2536
2537 DPRINTF(" CAPR write: rx buffer length %d head 0x%04x read 0x%04x\n",
2538 s->RxBufferSize, s->RxBufAddr, s->RxBufPtr);
2539 }
2540
2541 static uint32_t rtl8139_RxBufPtr_read(RTL8139State *s)
2542 {
2543 /* this value is off by 16 */
2544 uint32_t ret = s->RxBufPtr - 0x10;
2545
2546 DPRINTF("RxBufPtr read val=0x%04x\n", ret);
2547
2548 return ret;
2549 }
2550
2551 static uint32_t rtl8139_RxBufAddr_read(RTL8139State *s)
2552 {
2553 /* this value is NOT off by 16 */
2554 uint32_t ret = s->RxBufAddr;
2555
2556 DPRINTF("RxBufAddr read val=0x%04x\n", ret);
2557
2558 return ret;
2559 }
2560
2561 static void rtl8139_RxBuf_write(RTL8139State *s, uint32_t val)
2562 {
2563 DPRINTF("RxBuf write val=0x%08x\n", val);
2564
2565 s->RxBuf = val;
2566
2567 /* may need to reset rxring here */
2568 }
2569
2570 static uint32_t rtl8139_RxBuf_read(RTL8139State *s)
2571 {
2572 uint32_t ret = s->RxBuf;
2573
2574 DPRINTF("RxBuf read val=0x%08x\n", ret);
2575
2576 return ret;
2577 }
2578
2579 static void rtl8139_IntrMask_write(RTL8139State *s, uint32_t val)
2580 {
2581 DPRINTF("IntrMask write(w) val=0x%04x\n", val);
2582
2583 /* mask unwritable bits */
2584 val = SET_MASKED(val, 0x1e00, s->IntrMask);
2585
2586 s->IntrMask = val;
2587
2588 rtl8139_update_irq(s);
2589
2590 }
2591
2592 static uint32_t rtl8139_IntrMask_read(RTL8139State *s)
2593 {
2594 uint32_t ret = s->IntrMask;
2595
2596 DPRINTF("IntrMask read(w) val=0x%04x\n", ret);
2597
2598 return ret;
2599 }
2600
2601 static void rtl8139_IntrStatus_write(RTL8139State *s, uint32_t val)
2602 {
2603 DPRINTF("IntrStatus write(w) val=0x%04x\n", val);
2604
2605 #if 0
2606
2607 /* writing to ISR has no effect */
2608
2609 return;
2610
2611 #else
2612 uint16_t newStatus = s->IntrStatus & ~val;
2613
2614 /* mask unwritable bits */
2615 newStatus = SET_MASKED(newStatus, 0x1e00, s->IntrStatus);
2616
2617 /* writing 1 to interrupt status register bit clears it */
2618 s->IntrStatus = 0;
2619 rtl8139_update_irq(s);
2620
2621 s->IntrStatus = newStatus;
2622 rtl8139_set_next_tctr_time(s);
2623 rtl8139_update_irq(s);
2624
2625 #endif
2626 }
2627
2628 static uint32_t rtl8139_IntrStatus_read(RTL8139State *s)
2629 {
2630 uint32_t ret = s->IntrStatus;
2631
2632 DPRINTF("IntrStatus read(w) val=0x%04x\n", ret);
2633
2634 #if 0
2635
2636 /* reading ISR clears all interrupts */
2637 s->IntrStatus = 0;
2638
2639 rtl8139_update_irq(s);
2640
2641 #endif
2642
2643 return ret;
2644 }
2645
2646 static void rtl8139_MultiIntr_write(RTL8139State *s, uint32_t val)
2647 {
2648 DPRINTF("MultiIntr write(w) val=0x%04x\n", val);
2649
2650 /* mask unwritable bits */
2651 val = SET_MASKED(val, 0xf000, s->MultiIntr);
2652
2653 s->MultiIntr = val;
2654 }
2655
2656 static uint32_t rtl8139_MultiIntr_read(RTL8139State *s)
2657 {
2658 uint32_t ret = s->MultiIntr;
2659
2660 DPRINTF("MultiIntr read(w) val=0x%04x\n", ret);
2661
2662 return ret;
2663 }
2664
2665 static void rtl8139_io_writeb(void *opaque, uint8_t addr, uint32_t val)
2666 {
2667 RTL8139State *s = opaque;
2668
2669 switch (addr)
2670 {
2671 case MAC0 ... MAC0+4:
2672 s->phys[addr - MAC0] = val;
2673 break;
2674 case MAC0+5:
2675 s->phys[addr - MAC0] = val;
2676 qemu_format_nic_info_str(qemu_get_queue(s->nic), s->phys);
2677 break;
2678 case MAC0+6 ... MAC0+7:
2679 /* reserved */
2680 break;
2681 case MAR0 ... MAR0+7:
2682 s->mult[addr - MAR0] = val;
2683 break;
2684 case ChipCmd:
2685 rtl8139_ChipCmd_write(s, val);
2686 break;
2687 case Cfg9346:
2688 rtl8139_Cfg9346_write(s, val);
2689 break;
2690 case TxConfig: /* windows driver sometimes writes using byte-lenth call */
2691 rtl8139_TxConfig_writeb(s, val);
2692 break;
2693 case Config0:
2694 rtl8139_Config0_write(s, val);
2695 break;
2696 case Config1:
2697 rtl8139_Config1_write(s, val);
2698 break;
2699 case Config3:
2700 rtl8139_Config3_write(s, val);
2701 break;
2702 case Config4:
2703 rtl8139_Config4_write(s, val);
2704 break;
2705 case Config5:
2706 rtl8139_Config5_write(s, val);
2707 break;
2708 case MediaStatus:
2709 /* ignore */
2710 DPRINTF("not implemented write(b) to MediaStatus val=0x%02x\n",
2711 val);
2712 break;
2713
2714 case HltClk:
2715 DPRINTF("HltClk write val=0x%08x\n", val);
2716 if (val == 'R')
2717 {
2718 s->clock_enabled = 1;
2719 }
2720 else if (val == 'H')
2721 {
2722 s->clock_enabled = 0;
2723 }
2724 break;
2725
2726 case TxThresh:
2727 DPRINTF("C+ TxThresh write(b) val=0x%02x\n", val);
2728 s->TxThresh = val;
2729 break;
2730
2731 case TxPoll:
2732 DPRINTF("C+ TxPoll write(b) val=0x%02x\n", val);
2733 if (val & (1 << 7))
2734 {
2735 DPRINTF("C+ TxPoll high priority transmission (not "
2736 "implemented)\n");
2737 //rtl8139_cplus_transmit(s);
2738 }
2739 if (val & (1 << 6))
2740 {
2741 DPRINTF("C+ TxPoll normal priority transmission\n");
2742 rtl8139_cplus_transmit(s);
2743 }
2744
2745 break;
2746
2747 default:
2748 DPRINTF("not implemented write(b) addr=0x%x val=0x%02x\n", addr,
2749 val);
2750 break;
2751 }
2752 }
2753
2754 static void rtl8139_io_writew(void *opaque, uint8_t addr, uint32_t val)
2755 {
2756 RTL8139State *s = opaque;
2757
2758 switch (addr)
2759 {
2760 case IntrMask:
2761 rtl8139_IntrMask_write(s, val);
2762 break;
2763
2764 case IntrStatus:
2765 rtl8139_IntrStatus_write(s, val);
2766 break;
2767
2768 case MultiIntr:
2769 rtl8139_MultiIntr_write(s, val);
2770 break;
2771
2772 case RxBufPtr:
2773 rtl8139_RxBufPtr_write(s, val);
2774 break;
2775
2776 case BasicModeCtrl:
2777 rtl8139_BasicModeCtrl_write(s, val);
2778 break;
2779 case BasicModeStatus:
2780 rtl8139_BasicModeStatus_write(s, val);
2781 break;
2782 case NWayAdvert:
2783 DPRINTF("NWayAdvert write(w) val=0x%04x\n", val);
2784 s->NWayAdvert = val;
2785 break;
2786 case NWayLPAR:
2787 DPRINTF("forbidden NWayLPAR write(w) val=0x%04x\n", val);
2788 break;
2789 case NWayExpansion:
2790 DPRINTF("NWayExpansion write(w) val=0x%04x\n", val);
2791 s->NWayExpansion = val;
2792 break;
2793
2794 case CpCmd:
2795 rtl8139_CpCmd_write(s, val);
2796 break;
2797
2798 case IntrMitigate:
2799 rtl8139_IntrMitigate_write(s, val);
2800 break;
2801
2802 default:
2803 DPRINTF("ioport write(w) addr=0x%x val=0x%04x via write(b)\n",
2804 addr, val);
2805
2806 rtl8139_io_writeb(opaque, addr, val & 0xff);
2807 rtl8139_io_writeb(opaque, addr + 1, (val >> 8) & 0xff);
2808 break;
2809 }
2810 }
2811
2812 static void rtl8139_set_next_tctr_time(RTL8139State *s)
2813 {
2814 const uint64_t ns_per_period = (uint64_t)PCI_PERIOD << 32;
2815
2816 DPRINTF("entered rtl8139_set_next_tctr_time\n");
2817
2818 /* This function is called at least once per period, so it is a good
2819 * place to update the timer base.
2820 *
2821 * After one iteration of this loop the value in the Timer register does
2822 * not change, but the device model is counting up by 2^32 ticks (approx.
2823 * 130 seconds).
2824 */
2825 while (s->TCTR_base + ns_per_period <= qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)) {
2826 s->TCTR_base += ns_per_period;
2827 }
2828
2829 if (!s->TimerInt) {
2830 timer_del(s->timer);
2831 } else {
2832 uint64_t delta = (uint64_t)s->TimerInt * PCI_PERIOD;
2833 if (s->TCTR_base + delta <= qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)) {
2834 delta += ns_per_period;
2835 }
2836 timer_mod(s->timer, s->TCTR_base + delta);
2837 }
2838 }
2839
2840 static void rtl8139_io_writel(void *opaque, uint8_t addr, uint32_t val)
2841 {
2842 RTL8139State *s = opaque;
2843
2844 switch (addr)
2845 {
2846 case RxMissed:
2847 DPRINTF("RxMissed clearing on write\n");
2848 s->RxMissed = 0;
2849 break;
2850
2851 case TxConfig:
2852 rtl8139_TxConfig_write(s, val);
2853 break;
2854
2855 case RxConfig:
2856 rtl8139_RxConfig_write(s, val);
2857 break;
2858
2859 case TxStatus0 ... TxStatus0+4*4-1:
2860 rtl8139_TxStatus_write(s, addr-TxStatus0, val);
2861 break;
2862
2863 case TxAddr0 ... TxAddr0+4*4-1:
2864 rtl8139_TxAddr_write(s, addr-TxAddr0, val);
2865 break;
2866
2867 case RxBuf:
2868 rtl8139_RxBuf_write(s, val);
2869 break;
2870
2871 case RxRingAddrLO:
2872 DPRINTF("C+ RxRing low bits write val=0x%08x\n", val);
2873 s->RxRingAddrLO = val;
2874 break;
2875
2876 case RxRingAddrHI:
2877 DPRINTF("C+ RxRing high bits write val=0x%08x\n", val);
2878 s->RxRingAddrHI = val;
2879 break;
2880
2881 case Timer:
2882 DPRINTF("TCTR Timer reset on write\n");
2883 s->TCTR_base = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
2884 rtl8139_set_next_tctr_time(s);
2885 break;
2886
2887 case FlashReg:
2888 DPRINTF("FlashReg TimerInt write val=0x%08x\n", val);
2889 if (s->TimerInt != val) {
2890 s->TimerInt = val;
2891 rtl8139_set_next_tctr_time(s);
2892 }
2893 break;
2894
2895 default:
2896 DPRINTF("ioport write(l) addr=0x%x val=0x%08x via write(b)\n",
2897 addr, val);
2898 rtl8139_io_writeb(opaque, addr, val & 0xff);
2899 rtl8139_io_writeb(opaque, addr + 1, (val >> 8) & 0xff);
2900 rtl8139_io_writeb(opaque, addr + 2, (val >> 16) & 0xff);
2901 rtl8139_io_writeb(opaque, addr + 3, (val >> 24) & 0xff);
2902 break;
2903 }
2904 }
2905
2906 static uint32_t rtl8139_io_readb(void *opaque, uint8_t addr)
2907 {
2908 RTL8139State *s = opaque;
2909 int ret;
2910
2911 switch (addr)
2912 {
2913 case MAC0 ... MAC0+5:
2914 ret = s->phys[addr - MAC0];
2915 break;
2916 case MAC0+6 ... MAC0+7:
2917 ret = 0;
2918 break;
2919 case MAR0 ... MAR0+7:
2920 ret = s->mult[addr - MAR0];
2921 break;
2922 case TxStatus0 ... TxStatus0+4*4-1:
2923 ret = rtl8139_TxStatus_TxAddr_read(s, s->TxStatus, TxStatus0,
2924 addr, 1);
2925 break;
2926 case ChipCmd:
2927 ret = rtl8139_ChipCmd_read(s);
2928 break;
2929 case Cfg9346:
2930 ret = rtl8139_Cfg9346_read(s);
2931 break;
2932 case Config0:
2933 ret = rtl8139_Config0_read(s);
2934 break;
2935 case Config1:
2936 ret = rtl8139_Config1_read(s);
2937 break;
2938 case Config3:
2939 ret = rtl8139_Config3_read(s);
2940 break;
2941 case Config4:
2942 ret = rtl8139_Config4_read(s);
2943 break;
2944 case Config5:
2945 ret = rtl8139_Config5_read(s);
2946 break;
2947
2948 case MediaStatus:
2949 /* The LinkDown bit of MediaStatus is inverse with link status */
2950 ret = 0xd0 | (~s->BasicModeStatus & 0x04);
2951 DPRINTF("MediaStatus read 0x%x\n", ret);
2952 break;
2953
2954 case HltClk:
2955 ret = s->clock_enabled;
2956 DPRINTF("HltClk read 0x%x\n", ret);
2957 break;
2958
2959 case PCIRevisionID:
2960 ret = RTL8139_PCI_REVID;
2961 DPRINTF("PCI Revision ID read 0x%x\n", ret);
2962 break;
2963
2964 case TxThresh:
2965 ret = s->TxThresh;
2966 DPRINTF("C+ TxThresh read(b) val=0x%02x\n", ret);
2967 break;
2968
2969 case 0x43: /* Part of TxConfig register. Windows driver tries to read it */
2970 ret = s->TxConfig >> 24;
2971 DPRINTF("RTL8139C TxConfig at 0x43 read(b) val=0x%02x\n", ret);
2972 break;
2973
2974 default:
2975 DPRINTF("not implemented read(b) addr=0x%x\n", addr);
2976 ret = 0;
2977 break;
2978 }
2979
2980 return ret;
2981 }
2982
2983 static uint32_t rtl8139_io_readw(void *opaque, uint8_t addr)
2984 {
2985 RTL8139State *s = opaque;
2986 uint32_t ret;
2987
2988 switch (addr)
2989 {
2990 case TxAddr0 ... TxAddr0+4*4-1:
2991 ret = rtl8139_TxStatus_TxAddr_read(s, s->TxAddr, TxAddr0, addr, 2);
2992 break;
2993 case IntrMask:
2994 ret = rtl8139_IntrMask_read(s);
2995 break;
2996
2997 case IntrStatus:
2998 ret = rtl8139_IntrStatus_read(s);
2999 break;
3000
3001 case MultiIntr:
3002 ret = rtl8139_MultiIntr_read(s);
3003 break;
3004
3005 case RxBufPtr:
3006 ret = rtl8139_RxBufPtr_read(s);
3007 break;
3008
3009 case RxBufAddr:
3010 ret = rtl8139_RxBufAddr_read(s);
3011 break;
3012
3013 case BasicModeCtrl:
3014 ret = rtl8139_BasicModeCtrl_read(s);
3015 break;
3016 case BasicModeStatus:
3017 ret = rtl8139_BasicModeStatus_read(s);
3018 break;
3019 case NWayAdvert:
3020 ret = s->NWayAdvert;
3021 DPRINTF("NWayAdvert read(w) val=0x%04x\n", ret);
3022 break;
3023 case NWayLPAR:
3024 ret = s->NWayLPAR;
3025 DPRINTF("NWayLPAR read(w) val=0x%04x\n", ret);
3026 break;
3027 case NWayExpansion:
3028 ret = s->NWayExpansion;
3029 DPRINTF("NWayExpansion read(w) val=0x%04x\n", ret);
3030 break;
3031
3032 case CpCmd:
3033 ret = rtl8139_CpCmd_read(s);
3034 break;
3035
3036 case IntrMitigate:
3037 ret = rtl8139_IntrMitigate_read(s);
3038 break;
3039
3040 case TxSummary:
3041 ret = rtl8139_TSAD_read(s);
3042 break;
3043
3044 case CSCR:
3045 ret = rtl8139_CSCR_read(s);
3046 break;
3047
3048 default:
3049 DPRINTF("ioport read(w) addr=0x%x via read(b)\n", addr);
3050
3051 ret = rtl8139_io_readb(opaque, addr);
3052 ret |= rtl8139_io_readb(opaque, addr + 1) << 8;
3053
3054 DPRINTF("ioport read(w) addr=0x%x val=0x%04x\n", addr, ret);
3055 break;
3056 }
3057
3058 return ret;
3059 }
3060
3061 static uint32_t rtl8139_io_readl(void *opaque, uint8_t addr)
3062 {
3063 RTL8139State *s = opaque;
3064 uint32_t ret;
3065
3066 switch (addr)
3067 {
3068 case RxMissed:
3069 ret = s->RxMissed;
3070
3071 DPRINTF("RxMissed read val=0x%08x\n", ret);
3072 break;
3073
3074 case TxConfig:
3075 ret = rtl8139_TxConfig_read(s);
3076 break;
3077
3078 case RxConfig:
3079 ret = rtl8139_RxConfig_read(s);
3080 break;
3081
3082 case TxStatus0 ... TxStatus0+4*4-1:
3083 ret = rtl8139_TxStatus_TxAddr_read(s, s->TxStatus, TxStatus0,
3084 addr, 4);
3085 break;
3086
3087 case TxAddr0 ... TxAddr0+4*4-1:
3088 ret = rtl8139_TxAddr_read(s, addr-TxAddr0);
3089 break;
3090
3091 case RxBuf:
3092 ret = rtl8139_RxBuf_read(s);
3093 break;
3094
3095 case RxRingAddrLO:
3096 ret = s->RxRingAddrLO;
3097 DPRINTF("C+ RxRing low bits read val=0x%08x\n", ret);
3098 break;
3099
3100 case RxRingAddrHI:
3101 ret = s->RxRingAddrHI;
3102 DPRINTF("C+ RxRing high bits read val=0x%08x\n", ret);
3103 break;
3104
3105 case Timer:
3106 ret = (qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - s->TCTR_base) /
3107 PCI_PERIOD;
3108 DPRINTF("TCTR Timer read val=0x%08x\n", ret);
3109 break;
3110
3111 case FlashReg:
3112 ret = s->TimerInt;
3113 DPRINTF("FlashReg TimerInt read val=0x%08x\n", ret);
3114 break;
3115
3116 default:
3117 DPRINTF("ioport read(l) addr=0x%x via read(b)\n", addr);
3118
3119 ret = rtl8139_io_readb(opaque, addr);
3120 ret |= rtl8139_io_readb(opaque, addr + 1) << 8;
3121 ret |= rtl8139_io_readb(opaque, addr + 2) << 16;
3122 ret |= rtl8139_io_readb(opaque, addr + 3) << 24;
3123
3124 DPRINTF("read(l) addr=0x%x val=%08x\n", addr, ret);
3125 break;
3126 }
3127
3128 return ret;
3129 }
3130
3131 /* */
3132
3133 static int rtl8139_post_load(void *opaque, int version_id)
3134 {
3135 RTL8139State* s = opaque;
3136 rtl8139_set_next_tctr_time(s);
3137 if (version_id < 4) {
3138 s->cplus_enabled = s->CpCmd != 0;
3139 }
3140
3141 /* nc.link_down can't be migrated, so infer link_down according
3142 * to link status bit in BasicModeStatus */
3143 qemu_get_queue(s->nic)->link_down = (s->BasicModeStatus & 0x04) == 0;
3144
3145 return 0;
3146 }
3147
3148 static bool rtl8139_hotplug_ready_needed(void *opaque)
3149 {
3150 return qdev_machine_modified();
3151 }
3152
3153 static const VMStateDescription vmstate_rtl8139_hotplug_ready ={
3154 .name = "rtl8139/hotplug_ready",
3155 .version_id = 1,
3156 .minimum_version_id = 1,
3157 .needed = rtl8139_hotplug_ready_needed,
3158 .fields = (VMStateField[]) {
3159 VMSTATE_END_OF_LIST()
3160 }
3161 };
3162
3163 static int rtl8139_pre_save(void *opaque)
3164 {
3165 RTL8139State* s = opaque;
3166 int64_t current_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
3167
3168 /* for migration to older versions */
3169 s->TCTR = (current_time - s->TCTR_base) / PCI_PERIOD;
3170 s->rtl8139_mmio_io_addr_dummy = 0;
3171
3172 return 0;
3173 }
3174
3175 static const VMStateDescription vmstate_rtl8139 = {
3176 .name = "rtl8139",
3177 .version_id = 5,
3178 .minimum_version_id = 3,
3179 .post_load = rtl8139_post_load,
3180 .pre_save = rtl8139_pre_save,
3181 .fields = (VMStateField[]) {
3182 VMSTATE_PCI_DEVICE(parent_obj, RTL8139State),
3183 VMSTATE_PARTIAL_BUFFER(phys, RTL8139State, 6),
3184 VMSTATE_BUFFER(mult, RTL8139State),
3185 VMSTATE_UINT32_ARRAY(TxStatus, RTL8139State, 4),
3186 VMSTATE_UINT32_ARRAY(TxAddr, RTL8139State, 4),
3187
3188 VMSTATE_UINT32(RxBuf, RTL8139State),
3189 VMSTATE_UINT32(RxBufferSize, RTL8139State),
3190 VMSTATE_UINT32(RxBufPtr, RTL8139State),
3191 VMSTATE_UINT32(RxBufAddr, RTL8139State),
3192
3193 VMSTATE_UINT16(IntrStatus, RTL8139State),
3194 VMSTATE_UINT16(IntrMask, RTL8139State),
3195
3196 VMSTATE_UINT32(TxConfig, RTL8139State),
3197 VMSTATE_UINT32(RxConfig, RTL8139State),
3198 VMSTATE_UINT32(RxMissed, RTL8139State),
3199 VMSTATE_UINT16(CSCR, RTL8139State),
3200
3201 VMSTATE_UINT8(Cfg9346, RTL8139State),
3202 VMSTATE_UINT8(Config0, RTL8139State),
3203 VMSTATE_UINT8(Config1, RTL8139State),
3204 VMSTATE_UINT8(Config3, RTL8139State),
3205 VMSTATE_UINT8(Config4, RTL8139State),
3206 VMSTATE_UINT8(Config5, RTL8139State),
3207
3208 VMSTATE_UINT8(clock_enabled, RTL8139State),
3209 VMSTATE_UINT8(bChipCmdState, RTL8139State),
3210
3211 VMSTATE_UINT16(MultiIntr, RTL8139State),
3212
3213 VMSTATE_UINT16(BasicModeCtrl, RTL8139State),
3214 VMSTATE_UINT16(BasicModeStatus, RTL8139State),
3215 VMSTATE_UINT16(NWayAdvert, RTL8139State),
3216 VMSTATE_UINT16(NWayLPAR, RTL8139State),
3217 VMSTATE_UINT16(NWayExpansion, RTL8139State),
3218
3219 VMSTATE_UINT16(CpCmd, RTL8139State),
3220 VMSTATE_UINT8(TxThresh, RTL8139State),
3221
3222 VMSTATE_UNUSED(4),
3223 VMSTATE_MACADDR(conf.macaddr, RTL8139State),
3224 VMSTATE_INT32(rtl8139_mmio_io_addr_dummy, RTL8139State),
3225
3226 VMSTATE_UINT32(currTxDesc, RTL8139State),
3227 VMSTATE_UINT32(currCPlusRxDesc, RTL8139State),
3228 VMSTATE_UINT32(currCPlusTxDesc, RTL8139State),
3229 VMSTATE_UINT32(RxRingAddrLO, RTL8139State),
3230 VMSTATE_UINT32(RxRingAddrHI, RTL8139State),
3231
3232 VMSTATE_UINT16_ARRAY(eeprom.contents, RTL8139State, EEPROM_9346_SIZE),
3233 VMSTATE_INT32(eeprom.mode, RTL8139State),
3234 VMSTATE_UINT32(eeprom.tick, RTL8139State),
3235 VMSTATE_UINT8(eeprom.address, RTL8139State),
3236 VMSTATE_UINT16(eeprom.input, RTL8139State),
3237 VMSTATE_UINT16(eeprom.output, RTL8139State),
3238
3239 VMSTATE_UINT8(eeprom.eecs, RTL8139State),
3240 VMSTATE_UINT8(eeprom.eesk, RTL8139State),
3241 VMSTATE_UINT8(eeprom.eedi, RTL8139State),
3242 VMSTATE_UINT8(eeprom.eedo, RTL8139State),
3243
3244 VMSTATE_UINT32(TCTR, RTL8139State),
3245 VMSTATE_UINT32(TimerInt, RTL8139State),
3246 VMSTATE_INT64(TCTR_base, RTL8139State),
3247
3248 VMSTATE_UINT64(tally_counters.TxOk, RTL8139State),
3249 VMSTATE_UINT64(tally_counters.RxOk, RTL8139State),
3250 VMSTATE_UINT64(tally_counters.TxERR, RTL8139State),
3251 VMSTATE_UINT32(tally_counters.RxERR, RTL8139State),
3252 VMSTATE_UINT16(tally_counters.MissPkt, RTL8139State),
3253 VMSTATE_UINT16(tally_counters.FAE, RTL8139State),
3254 VMSTATE_UINT32(tally_counters.Tx1Col, RTL8139State),
3255 VMSTATE_UINT32(tally_counters.TxMCol, RTL8139State),
3256 VMSTATE_UINT64(tally_counters.RxOkPhy, RTL8139State),
3257 VMSTATE_UINT64(tally_counters.RxOkBrd, RTL8139State),
3258 VMSTATE_UINT32_V(tally_counters.RxOkMul, RTL8139State, 5),
3259 VMSTATE_UINT16(tally_counters.TxAbt, RTL8139State),
3260 VMSTATE_UINT16(tally_counters.TxUndrn, RTL8139State),
3261
3262 VMSTATE_UINT32_V(cplus_enabled, RTL8139State, 4),
3263 VMSTATE_END_OF_LIST()
3264 },
3265 .subsections = (const VMStateDescription*[]) {
3266 &vmstate_rtl8139_hotplug_ready,
3267 NULL
3268 }
3269 };
3270
3271 /***********************************************************/
3272 /* PCI RTL8139 definitions */
3273
3274 static void rtl8139_ioport_write(void *opaque, hwaddr addr,
3275 uint64_t val, unsigned size)
3276 {
3277 switch (size) {
3278 case 1:
3279 rtl8139_io_writeb(opaque, addr, val);
3280 break;
3281 case 2:
3282 rtl8139_io_writew(opaque, addr, val);
3283 break;
3284 case 4:
3285 rtl8139_io_writel(opaque, addr, val);
3286 break;
3287 }
3288 }
3289
3290 static uint64_t rtl8139_ioport_read(void *opaque, hwaddr addr,
3291 unsigned size)
3292 {
3293 switch (size) {
3294 case 1:
3295 return rtl8139_io_readb(opaque, addr);
3296 case 2:
3297 return rtl8139_io_readw(opaque, addr);
3298 case 4:
3299 return rtl8139_io_readl(opaque, addr);
3300 }
3301
3302 return -1;
3303 }
3304
3305 static const MemoryRegionOps rtl8139_io_ops = {
3306 .read = rtl8139_ioport_read,
3307 .write = rtl8139_ioport_write,
3308 .impl = {
3309 .min_access_size = 1,
3310 .max_access_size = 4,
3311 },
3312 .endianness = DEVICE_LITTLE_ENDIAN,
3313 };
3314
3315 static void rtl8139_timer(void *opaque)
3316 {
3317 RTL8139State *s = opaque;
3318
3319 if (!s->clock_enabled)
3320 {
3321 DPRINTF(">>> timer: clock is not running\n");
3322 return;
3323 }
3324
3325 s->IntrStatus |= PCSTimeout;
3326 rtl8139_update_irq(s);
3327 rtl8139_set_next_tctr_time(s);
3328 }
3329
3330 static void pci_rtl8139_uninit(PCIDevice *dev)
3331 {
3332 RTL8139State *s = RTL8139(dev);
3333
3334 g_free(s->cplus_txbuffer);
3335 s->cplus_txbuffer = NULL;
3336 timer_del(s->timer);
3337 timer_free(s->timer);
3338 qemu_del_nic(s->nic);
3339 }
3340
3341 static void rtl8139_set_link_status(NetClientState *nc)
3342 {
3343 RTL8139State *s = qemu_get_nic_opaque(nc);
3344
3345 if (nc->link_down) {
3346 s->BasicModeStatus &= ~0x04;
3347 } else {
3348 s->BasicModeStatus |= 0x04;
3349 }
3350
3351 s->IntrStatus |= RxUnderrun;
3352 rtl8139_update_irq(s);
3353 }
3354
3355 static NetClientInfo net_rtl8139_info = {
3356 .type = NET_CLIENT_DRIVER_NIC,
3357 .size = sizeof(NICState),
3358 .can_receive = rtl8139_can_receive,
3359 .receive = rtl8139_receive,
3360 .link_status_changed = rtl8139_set_link_status,
3361 };
3362
3363 static void pci_rtl8139_realize(PCIDevice *dev, Error **errp)
3364 {
3365 RTL8139State *s = RTL8139(dev);
3366 DeviceState *d = DEVICE(dev);
3367 uint8_t *pci_conf;
3368
3369 pci_conf = dev->config;
3370 pci_conf[PCI_INTERRUPT_PIN] = 1; /* interrupt pin A */
3371 /* TODO: start of capability list, but no capability
3372 * list bit in status register, and offset 0xdc seems unused. */
3373 pci_conf[PCI_CAPABILITY_LIST] = 0xdc;
3374
3375 memory_region_init_io(&s->bar_io, OBJECT(s), &rtl8139_io_ops, s,
3376 "rtl8139", 0x100);
3377 memory_region_init_alias(&s->bar_mem, OBJECT(s), "rtl8139-mem", &s->bar_io,
3378 0, 0x100);
3379
3380 pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->bar_io);
3381 pci_register_bar(dev, 1, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->bar_mem);
3382
3383 qemu_macaddr_default_if_unset(&s->conf.macaddr);
3384
3385 /* prepare eeprom */
3386 s->eeprom.contents[0] = 0x8129;
3387 #if 1
3388 /* PCI vendor and device ID should be mirrored here */
3389 s->eeprom.contents[1] = PCI_VENDOR_ID_REALTEK;
3390 s->eeprom.contents[2] = PCI_DEVICE_ID_REALTEK_8139;
3391 #endif
3392 s->eeprom.contents[7] = s->conf.macaddr.a[0] | s->conf.macaddr.a[1] << 8;
3393 s->eeprom.contents[8] = s->conf.macaddr.a[2] | s->conf.macaddr.a[3] << 8;
3394 s->eeprom.contents[9] = s->conf.macaddr.a[4] | s->conf.macaddr.a[5] << 8;
3395
3396 s->nic = qemu_new_nic(&net_rtl8139_info, &s->conf,
3397 object_get_typename(OBJECT(dev)), d->id, s);
3398 qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
3399
3400 s->cplus_txbuffer = NULL;
3401 s->cplus_txbuffer_len = 0;
3402 s->cplus_txbuffer_offset = 0;
3403
3404 s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, rtl8139_timer, s);
3405 }
3406
3407 static void rtl8139_instance_init(Object *obj)
3408 {
3409 RTL8139State *s = RTL8139(obj);
3410
3411 device_add_bootindex_property(obj, &s->conf.bootindex,
3412 "bootindex", "/ethernet-phy@0",
3413 DEVICE(obj), NULL);
3414 }
3415
3416 static Property rtl8139_properties[] = {
3417 DEFINE_NIC_PROPERTIES(RTL8139State, conf),
3418 DEFINE_PROP_END_OF_LIST(),
3419 };
3420
3421 static void rtl8139_class_init(ObjectClass *klass, void *data)
3422 {
3423 DeviceClass *dc = DEVICE_CLASS(klass);
3424 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
3425
3426 k->realize = pci_rtl8139_realize;
3427 k->exit = pci_rtl8139_uninit;
3428 k->romfile = "efi-rtl8139.rom";
3429 k->vendor_id = PCI_VENDOR_ID_REALTEK;
3430 k->device_id = PCI_DEVICE_ID_REALTEK_8139;
3431 k->revision = RTL8139_PCI_REVID; /* >=0x20 is for 8139C+ */
3432 k->class_id = PCI_CLASS_NETWORK_ETHERNET;
3433 dc->reset = rtl8139_reset;
3434 dc->vmsd = &vmstate_rtl8139;
3435 dc->props = rtl8139_properties;
3436 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
3437 }
3438
3439 static const TypeInfo rtl8139_info = {
3440 .name = TYPE_RTL8139,
3441 .parent = TYPE_PCI_DEVICE,
3442 .instance_size = sizeof(RTL8139State),
3443 .class_init = rtl8139_class_init,
3444 .instance_init = rtl8139_instance_init,
3445 .interfaces = (InterfaceInfo[]) {
3446 { INTERFACE_CONVENTIONAL_PCI_DEVICE },
3447 { },
3448 },
3449 };
3450
3451 static void rtl8139_register_types(void)
3452 {
3453 type_register_static(&rtl8139_info);
3454 }
3455
3456 type_init(rtl8139_register_types)
AR7 emulation for QEMU