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Merge commit 'ff71f2e8cacefae99179993204172bc65e4303df' into staging
[mirror_qemu.git] / hw / rtl8139.c
1 /**
2 * QEMU RTL8139 emulation
3 *
4 * Copyright (c) 2006 Igor Kovalenko
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23
24 * Modifications:
25 * 2006-Jan-28 Mark Malakanov : TSAD and CSCR implementation (for Windows driver)
26 *
27 * 2006-Apr-28 Juergen Lock : EEPROM emulation changes for FreeBSD driver
28 * HW revision ID changes for FreeBSD driver
29 *
30 * 2006-Jul-01 Igor Kovalenko : Implemented loopback mode for FreeBSD driver
31 * Corrected packet transfer reassembly routine for 8139C+ mode
32 * Rearranged debugging print statements
33 * Implemented PCI timer interrupt (disabled by default)
34 * Implemented Tally Counters, increased VM load/save version
35 * Implemented IP/TCP/UDP checksum task offloading
36 *
37 * 2006-Jul-04 Igor Kovalenko : Implemented TCP segmentation offloading
38 * Fixed MTU=1500 for produced ethernet frames
39 *
40 * 2006-Jul-09 Igor Kovalenko : Fixed TCP header length calculation while processing
41 * segmentation offloading
42 * Removed slirp.h dependency
43 * Added rx/tx buffer reset when enabling rx/tx operation
44 *
45 * 2010-Feb-04 Frediano Ziglio: Rewrote timer support using QEMU timer only
46 * when strictly needed (required for for
47 * Darwin)
48 * 2011-Mar-22 Benjamin Poirier: Implemented VLAN offloading
49 */
50
51 /* For crc32 */
52 #include <zlib.h>
53
54 #include "hw.h"
55 #include "pci.h"
56 #include "dma.h"
57 #include "qemu-timer.h"
58 #include "net.h"
59 #include "loader.h"
60 #include "sysemu.h"
61 #include "iov.h"
62
63 /* debug RTL8139 card */
64 //#define DEBUG_RTL8139 1
65
66 #define PCI_FREQUENCY 33000000L
67
68 #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_ADDR_LEN 6
76 #define ETHER_TYPE_LEN 2
77 #define ETH_HLEN (ETHER_ADDR_LEN * 2 + ETHER_TYPE_LEN)
78 #define ETH_P_IP 0x0800 /* Internet Protocol packet */
79 #define ETH_P_8021Q 0x8100 /* 802.1Q VLAN Extended Header */
80 #define ETH_MTU 1500
81
82 #define VLAN_TCI_LEN 2
83 #define VLAN_HLEN (ETHER_TYPE_LEN + VLAN_TCI_LEN)
84
85 #if defined (DEBUG_RTL8139)
86 # define DPRINTF(fmt, ...) \
87 do { fprintf(stderr, "RTL8139: " fmt, ## __VA_ARGS__); } while (0)
88 #else
89 static inline GCC_FMT_ATTR(1, 2) int DPRINTF(const char *fmt, ...)
90 {
91 return 0;
92 }
93 #endif
94
95 /* Symbolic offsets to registers. */
96 enum RTL8139_registers {
97 MAC0 = 0, /* Ethernet hardware address. */
98 MAR0 = 8, /* Multicast filter. */
99 TxStatus0 = 0x10,/* Transmit status (Four 32bit registers). C mode only */
100 /* Dump Tally Conter control register(64bit). C+ mode only */
101 TxAddr0 = 0x20, /* Tx descriptors (also four 32bit). */
102 RxBuf = 0x30,
103 ChipCmd = 0x37,
104 RxBufPtr = 0x38,
105 RxBufAddr = 0x3A,
106 IntrMask = 0x3C,
107 IntrStatus = 0x3E,
108 TxConfig = 0x40,
109 RxConfig = 0x44,
110 Timer = 0x48, /* A general-purpose counter. */
111 RxMissed = 0x4C, /* 24 bits valid, write clears. */
112 Cfg9346 = 0x50,
113 Config0 = 0x51,
114 Config1 = 0x52,
115 FlashReg = 0x54,
116 MediaStatus = 0x58,
117 Config3 = 0x59,
118 Config4 = 0x5A, /* absent on RTL-8139A */
119 HltClk = 0x5B,
120 MultiIntr = 0x5C,
121 PCIRevisionID = 0x5E,
122 TxSummary = 0x60, /* TSAD register. Transmit Status of All Descriptors*/
123 BasicModeCtrl = 0x62,
124 BasicModeStatus = 0x64,
125 NWayAdvert = 0x66,
126 NWayLPAR = 0x68,
127 NWayExpansion = 0x6A,
128 /* Undocumented registers, but required for proper operation. */
129 FIFOTMS = 0x70, /* FIFO Control and test. */
130 CSCR = 0x74, /* Chip Status and Configuration Register. */
131 PARA78 = 0x78,
132 PARA7c = 0x7c, /* Magic transceiver parameter register. */
133 Config5 = 0xD8, /* absent on RTL-8139A */
134 /* C+ mode */
135 TxPoll = 0xD9, /* Tell chip to check Tx descriptors for work */
136 RxMaxSize = 0xDA, /* Max size of an Rx packet (8169 only) */
137 CpCmd = 0xE0, /* C+ Command register (C+ mode only) */
138 IntrMitigate = 0xE2, /* rx/tx interrupt mitigation control */
139 RxRingAddrLO = 0xE4, /* 64-bit start addr of Rx ring */
140 RxRingAddrHI = 0xE8, /* 64-bit start addr of Rx ring */
141 TxThresh = 0xEC, /* Early Tx threshold */
142 };
143
144 enum ClearBitMasks {
145 MultiIntrClear = 0xF000,
146 ChipCmdClear = 0xE2,
147 Config1Clear = (1<<7)|(1<<6)|(1<<3)|(1<<2)|(1<<1),
148 };
149
150 enum ChipCmdBits {
151 CmdReset = 0x10,
152 CmdRxEnb = 0x08,
153 CmdTxEnb = 0x04,
154 RxBufEmpty = 0x01,
155 };
156
157 /* C+ mode */
158 enum CplusCmdBits {
159 CPlusRxVLAN = 0x0040, /* enable receive VLAN detagging */
160 CPlusRxChkSum = 0x0020, /* enable receive checksum offloading */
161 CPlusRxEnb = 0x0002,
162 CPlusTxEnb = 0x0001,
163 };
164
165 /* Interrupt register bits, using my own meaningful names. */
166 enum IntrStatusBits {
167 PCIErr = 0x8000,
168 PCSTimeout = 0x4000,
169 RxFIFOOver = 0x40,
170 RxUnderrun = 0x20,
171 RxOverflow = 0x10,
172 TxErr = 0x08,
173 TxOK = 0x04,
174 RxErr = 0x02,
175 RxOK = 0x01,
176
177 RxAckBits = RxFIFOOver | RxOverflow | RxOK,
178 };
179
180 enum TxStatusBits {
181 TxHostOwns = 0x2000,
182 TxUnderrun = 0x4000,
183 TxStatOK = 0x8000,
184 TxOutOfWindow = 0x20000000,
185 TxAborted = 0x40000000,
186 TxCarrierLost = 0x80000000,
187 };
188 enum RxStatusBits {
189 RxMulticast = 0x8000,
190 RxPhysical = 0x4000,
191 RxBroadcast = 0x2000,
192 RxBadSymbol = 0x0020,
193 RxRunt = 0x0010,
194 RxTooLong = 0x0008,
195 RxCRCErr = 0x0004,
196 RxBadAlign = 0x0002,
197 RxStatusOK = 0x0001,
198 };
199
200 /* Bits in RxConfig. */
201 enum rx_mode_bits {
202 AcceptErr = 0x20,
203 AcceptRunt = 0x10,
204 AcceptBroadcast = 0x08,
205 AcceptMulticast = 0x04,
206 AcceptMyPhys = 0x02,
207 AcceptAllPhys = 0x01,
208 };
209
210 /* Bits in TxConfig. */
211 enum tx_config_bits {
212
213 /* Interframe Gap Time. Only TxIFG96 doesn't violate IEEE 802.3 */
214 TxIFGShift = 24,
215 TxIFG84 = (0 << TxIFGShift), /* 8.4us / 840ns (10 / 100Mbps) */
216 TxIFG88 = (1 << TxIFGShift), /* 8.8us / 880ns (10 / 100Mbps) */
217 TxIFG92 = (2 << TxIFGShift), /* 9.2us / 920ns (10 / 100Mbps) */
218 TxIFG96 = (3 << TxIFGShift), /* 9.6us / 960ns (10 / 100Mbps) */
219
220 TxLoopBack = (1 << 18) | (1 << 17), /* enable loopback test mode */
221 TxCRC = (1 << 16), /* DISABLE appending CRC to end of Tx packets */
222 TxClearAbt = (1 << 0), /* Clear abort (WO) */
223 TxDMAShift = 8, /* DMA burst value (0-7) is shifted this many bits */
224 TxRetryShift = 4, /* TXRR value (0-15) is shifted this many bits */
225
226 TxVersionMask = 0x7C800000, /* mask out version bits 30-26, 23 */
227 };
228
229
230 /* Transmit Status of All Descriptors (TSAD) Register */
231 enum TSAD_bits {
232 TSAD_TOK3 = 1<<15, // TOK bit of Descriptor 3
233 TSAD_TOK2 = 1<<14, // TOK bit of Descriptor 2
234 TSAD_TOK1 = 1<<13, // TOK bit of Descriptor 1
235 TSAD_TOK0 = 1<<12, // TOK bit of Descriptor 0
236 TSAD_TUN3 = 1<<11, // TUN bit of Descriptor 3
237 TSAD_TUN2 = 1<<10, // TUN bit of Descriptor 2
238 TSAD_TUN1 = 1<<9, // TUN bit of Descriptor 1
239 TSAD_TUN0 = 1<<8, // TUN bit of Descriptor 0
240 TSAD_TABT3 = 1<<07, // TABT bit of Descriptor 3
241 TSAD_TABT2 = 1<<06, // TABT bit of Descriptor 2
242 TSAD_TABT1 = 1<<05, // TABT bit of Descriptor 1
243 TSAD_TABT0 = 1<<04, // TABT bit of Descriptor 0
244 TSAD_OWN3 = 1<<03, // OWN bit of Descriptor 3
245 TSAD_OWN2 = 1<<02, // OWN bit of Descriptor 2
246 TSAD_OWN1 = 1<<01, // OWN bit of Descriptor 1
247 TSAD_OWN0 = 1<<00, // OWN bit of Descriptor 0
248 };
249
250
251 /* Bits in Config1 */
252 enum Config1Bits {
253 Cfg1_PM_Enable = 0x01,
254 Cfg1_VPD_Enable = 0x02,
255 Cfg1_PIO = 0x04,
256 Cfg1_MMIO = 0x08,
257 LWAKE = 0x10, /* not on 8139, 8139A */
258 Cfg1_Driver_Load = 0x20,
259 Cfg1_LED0 = 0x40,
260 Cfg1_LED1 = 0x80,
261 SLEEP = (1 << 1), /* only on 8139, 8139A */
262 PWRDN = (1 << 0), /* only on 8139, 8139A */
263 };
264
265 /* Bits in Config3 */
266 enum Config3Bits {
267 Cfg3_FBtBEn = (1 << 0), /* 1 = Fast Back to Back */
268 Cfg3_FuncRegEn = (1 << 1), /* 1 = enable CardBus Function registers */
269 Cfg3_CLKRUN_En = (1 << 2), /* 1 = enable CLKRUN */
270 Cfg3_CardB_En = (1 << 3), /* 1 = enable CardBus registers */
271 Cfg3_LinkUp = (1 << 4), /* 1 = wake up on link up */
272 Cfg3_Magic = (1 << 5), /* 1 = wake up on Magic Packet (tm) */
273 Cfg3_PARM_En = (1 << 6), /* 0 = software can set twister parameters */
274 Cfg3_GNTSel = (1 << 7), /* 1 = delay 1 clock from PCI GNT signal */
275 };
276
277 /* Bits in Config4 */
278 enum Config4Bits {
279 LWPTN = (1 << 2), /* not on 8139, 8139A */
280 };
281
282 /* Bits in Config5 */
283 enum Config5Bits {
284 Cfg5_PME_STS = (1 << 0), /* 1 = PCI reset resets PME_Status */
285 Cfg5_LANWake = (1 << 1), /* 1 = enable LANWake signal */
286 Cfg5_LDPS = (1 << 2), /* 0 = save power when link is down */
287 Cfg5_FIFOAddrPtr = (1 << 3), /* Realtek internal SRAM testing */
288 Cfg5_UWF = (1 << 4), /* 1 = accept unicast wakeup frame */
289 Cfg5_MWF = (1 << 5), /* 1 = accept multicast wakeup frame */
290 Cfg5_BWF = (1 << 6), /* 1 = accept broadcast wakeup frame */
291 };
292
293 enum RxConfigBits {
294 /* rx fifo threshold */
295 RxCfgFIFOShift = 13,
296 RxCfgFIFONone = (7 << RxCfgFIFOShift),
297
298 /* Max DMA burst */
299 RxCfgDMAShift = 8,
300 RxCfgDMAUnlimited = (7 << RxCfgDMAShift),
301
302 /* rx ring buffer length */
303 RxCfgRcv8K = 0,
304 RxCfgRcv16K = (1 << 11),
305 RxCfgRcv32K = (1 << 12),
306 RxCfgRcv64K = (1 << 11) | (1 << 12),
307
308 /* Disable packet wrap at end of Rx buffer. (not possible with 64k) */
309 RxNoWrap = (1 << 7),
310 };
311
312 /* Twister tuning parameters from RealTek.
313 Completely undocumented, but required to tune bad links on some boards. */
314 /*
315 enum CSCRBits {
316 CSCR_LinkOKBit = 0x0400,
317 CSCR_LinkChangeBit = 0x0800,
318 CSCR_LinkStatusBits = 0x0f000,
319 CSCR_LinkDownOffCmd = 0x003c0,
320 CSCR_LinkDownCmd = 0x0f3c0,
321 */
322 enum CSCRBits {
323 CSCR_Testfun = 1<<15, /* 1 = Auto-neg speeds up internal timer, WO, def 0 */
324 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*/
325 CSCR_HEART_BIT = 1<<8, /* 1 = HEART BEAT enable, 0 = HEART BEAT disable. HEART BEAT function is only valid in 10Mbps mode. def 1*/
326 CSCR_JBEN = 1<<7, /* 1 = enable jabber function. 0 = disable jabber function, def 1*/
327 CSCR_F_LINK_100 = 1<<6, /* Used to login force good link in 100Mbps for diagnostic purposes. 1 = DISABLE, 0 = ENABLE. def 1*/
328 CSCR_F_Connect = 1<<5, /* Assertion of this bit forces the disconnect function to be bypassed. def 0*/
329 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*/
330 CSCR_Con_status_En = 1<<2, /* Assertion of this bit configures LED1 pin to indicate connection status. def 0*/
331 CSCR_PASS_SCR = 1<<0, /* Bypass Scramble, def 0*/
332 };
333
334 enum Cfg9346Bits {
335 Cfg9346_Normal = 0x00,
336 Cfg9346_Autoload = 0x40,
337 Cfg9346_Programming = 0x80,
338 Cfg9346_ConfigWrite = 0xC0,
339 };
340
341 typedef enum {
342 CH_8139 = 0,
343 CH_8139_K,
344 CH_8139A,
345 CH_8139A_G,
346 CH_8139B,
347 CH_8130,
348 CH_8139C,
349 CH_8100,
350 CH_8100B_8139D,
351 CH_8101,
352 } chip_t;
353
354 enum chip_flags {
355 HasHltClk = (1 << 0),
356 HasLWake = (1 << 1),
357 };
358
359 #define HW_REVID(b30, b29, b28, b27, b26, b23, b22) \
360 (b30<<30 | b29<<29 | b28<<28 | b27<<27 | b26<<26 | b23<<23 | b22<<22)
361 #define HW_REVID_MASK HW_REVID(1, 1, 1, 1, 1, 1, 1)
362
363 #define RTL8139_PCI_REVID_8139 0x10
364 #define RTL8139_PCI_REVID_8139CPLUS 0x20
365
366 #define RTL8139_PCI_REVID RTL8139_PCI_REVID_8139CPLUS
367
368 /* Size is 64 * 16bit words */
369 #define EEPROM_9346_ADDR_BITS 6
370 #define EEPROM_9346_SIZE (1 << EEPROM_9346_ADDR_BITS)
371 #define EEPROM_9346_ADDR_MASK (EEPROM_9346_SIZE - 1)
372
373 enum Chip9346Operation
374 {
375 Chip9346_op_mask = 0xc0, /* 10 zzzzzz */
376 Chip9346_op_read = 0x80, /* 10 AAAAAA */
377 Chip9346_op_write = 0x40, /* 01 AAAAAA D(15)..D(0) */
378 Chip9346_op_ext_mask = 0xf0, /* 11 zzzzzz */
379 Chip9346_op_write_enable = 0x30, /* 00 11zzzz */
380 Chip9346_op_write_all = 0x10, /* 00 01zzzz */
381 Chip9346_op_write_disable = 0x00, /* 00 00zzzz */
382 };
383
384 enum Chip9346Mode
385 {
386 Chip9346_none = 0,
387 Chip9346_enter_command_mode,
388 Chip9346_read_command,
389 Chip9346_data_read, /* from output register */
390 Chip9346_data_write, /* to input register, then to contents at specified address */
391 Chip9346_data_write_all, /* to input register, then filling contents */
392 };
393
394 typedef struct EEprom9346
395 {
396 uint16_t contents[EEPROM_9346_SIZE];
397 int mode;
398 uint32_t tick;
399 uint8_t address;
400 uint16_t input;
401 uint16_t output;
402
403 uint8_t eecs;
404 uint8_t eesk;
405 uint8_t eedi;
406 uint8_t eedo;
407 } EEprom9346;
408
409 typedef struct RTL8139TallyCounters
410 {
411 /* Tally counters */
412 uint64_t TxOk;
413 uint64_t RxOk;
414 uint64_t TxERR;
415 uint32_t RxERR;
416 uint16_t MissPkt;
417 uint16_t FAE;
418 uint32_t Tx1Col;
419 uint32_t TxMCol;
420 uint64_t RxOkPhy;
421 uint64_t RxOkBrd;
422 uint32_t RxOkMul;
423 uint16_t TxAbt;
424 uint16_t TxUndrn;
425 } RTL8139TallyCounters;
426
427 /* Clears all tally counters */
428 static void RTL8139TallyCounters_clear(RTL8139TallyCounters* counters);
429
430 typedef struct RTL8139State {
431 PCIDevice dev;
432 uint8_t phys[8]; /* mac address */
433 uint8_t mult[8]; /* multicast mask array */
434
435 uint32_t TxStatus[4]; /* TxStatus0 in C mode*/ /* also DTCCR[0] and DTCCR[1] in C+ mode */
436 uint32_t TxAddr[4]; /* TxAddr0 */
437 uint32_t RxBuf; /* Receive buffer */
438 uint32_t RxBufferSize;/* internal variable, receive ring buffer size in C mode */
439 uint32_t RxBufPtr;
440 uint32_t RxBufAddr;
441
442 uint16_t IntrStatus;
443 uint16_t IntrMask;
444
445 uint32_t TxConfig;
446 uint32_t RxConfig;
447 uint32_t RxMissed;
448
449 uint16_t CSCR;
450
451 uint8_t Cfg9346;
452 uint8_t Config0;
453 uint8_t Config1;
454 uint8_t Config3;
455 uint8_t Config4;
456 uint8_t Config5;
457
458 uint8_t clock_enabled;
459 uint8_t bChipCmdState;
460
461 uint16_t MultiIntr;
462
463 uint16_t BasicModeCtrl;
464 uint16_t BasicModeStatus;
465 uint16_t NWayAdvert;
466 uint16_t NWayLPAR;
467 uint16_t NWayExpansion;
468
469 uint16_t CpCmd;
470 uint8_t TxThresh;
471
472 NICState *nic;
473 NICConf conf;
474
475 /* C ring mode */
476 uint32_t currTxDesc;
477
478 /* C+ mode */
479 uint32_t cplus_enabled;
480
481 uint32_t currCPlusRxDesc;
482 uint32_t currCPlusTxDesc;
483
484 uint32_t RxRingAddrLO;
485 uint32_t RxRingAddrHI;
486
487 EEprom9346 eeprom;
488
489 uint32_t TCTR;
490 uint32_t TimerInt;
491 int64_t TCTR_base;
492
493 /* Tally counters */
494 RTL8139TallyCounters tally_counters;
495
496 /* Non-persistent data */
497 uint8_t *cplus_txbuffer;
498 int cplus_txbuffer_len;
499 int cplus_txbuffer_offset;
500
501 /* PCI interrupt timer */
502 QEMUTimer *timer;
503 int64_t TimerExpire;
504
505 MemoryRegion bar_io;
506 MemoryRegion bar_mem;
507
508 /* Support migration to/from old versions */
509 int rtl8139_mmio_io_addr_dummy;
510 } RTL8139State;
511
512 /* Writes tally counters to memory via DMA */
513 static void RTL8139TallyCounters_dma_write(RTL8139State *s, dma_addr_t tc_addr);
514
515 static void rtl8139_set_next_tctr_time(RTL8139State *s, int64_t current_time);
516
517 static void prom9346_decode_command(EEprom9346 *eeprom, uint8_t command)
518 {
519 DPRINTF("eeprom command 0x%02x\n", command);
520
521 switch (command & Chip9346_op_mask)
522 {
523 case Chip9346_op_read:
524 {
525 eeprom->address = command & EEPROM_9346_ADDR_MASK;
526 eeprom->output = eeprom->contents[eeprom->address];
527 eeprom->eedo = 0;
528 eeprom->tick = 0;
529 eeprom->mode = Chip9346_data_read;
530 DPRINTF("eeprom read from address 0x%02x data=0x%04x\n",
531 eeprom->address, eeprom->output);
532 }
533 break;
534
535 case Chip9346_op_write:
536 {
537 eeprom->address = command & EEPROM_9346_ADDR_MASK;
538 eeprom->input = 0;
539 eeprom->tick = 0;
540 eeprom->mode = Chip9346_none; /* Chip9346_data_write */
541 DPRINTF("eeprom begin write to address 0x%02x\n",
542 eeprom->address);
543 }
544 break;
545 default:
546 eeprom->mode = Chip9346_none;
547 switch (command & Chip9346_op_ext_mask)
548 {
549 case Chip9346_op_write_enable:
550 DPRINTF("eeprom write enabled\n");
551 break;
552 case Chip9346_op_write_all:
553 DPRINTF("eeprom begin write all\n");
554 break;
555 case Chip9346_op_write_disable:
556 DPRINTF("eeprom write disabled\n");
557 break;
558 }
559 break;
560 }
561 }
562
563 static void prom9346_shift_clock(EEprom9346 *eeprom)
564 {
565 int bit = eeprom->eedi?1:0;
566
567 ++ eeprom->tick;
568
569 DPRINTF("eeprom: tick %d eedi=%d eedo=%d\n", eeprom->tick, eeprom->eedi,
570 eeprom->eedo);
571
572 switch (eeprom->mode)
573 {
574 case Chip9346_enter_command_mode:
575 if (bit)
576 {
577 eeprom->mode = Chip9346_read_command;
578 eeprom->tick = 0;
579 eeprom->input = 0;
580 DPRINTF("eeprom: +++ synchronized, begin command read\n");
581 }
582 break;
583
584 case Chip9346_read_command:
585 eeprom->input = (eeprom->input << 1) | (bit & 1);
586 if (eeprom->tick == 8)
587 {
588 prom9346_decode_command(eeprom, eeprom->input & 0xff);
589 }
590 break;
591
592 case Chip9346_data_read:
593 eeprom->eedo = (eeprom->output & 0x8000)?1:0;
594 eeprom->output <<= 1;
595 if (eeprom->tick == 16)
596 {
597 #if 1
598 // the FreeBSD drivers (rl and re) don't explicitly toggle
599 // CS between reads (or does setting Cfg9346 to 0 count too?),
600 // so we need to enter wait-for-command state here
601 eeprom->mode = Chip9346_enter_command_mode;
602 eeprom->input = 0;
603 eeprom->tick = 0;
604
605 DPRINTF("eeprom: +++ end of read, awaiting next command\n");
606 #else
607 // original behaviour
608 ++eeprom->address;
609 eeprom->address &= EEPROM_9346_ADDR_MASK;
610 eeprom->output = eeprom->contents[eeprom->address];
611 eeprom->tick = 0;
612
613 DPRINTF("eeprom: +++ read next address 0x%02x data=0x%04x\n",
614 eeprom->address, eeprom->output);
615 #endif
616 }
617 break;
618
619 case Chip9346_data_write:
620 eeprom->input = (eeprom->input << 1) | (bit & 1);
621 if (eeprom->tick == 16)
622 {
623 DPRINTF("eeprom write to address 0x%02x data=0x%04x\n",
624 eeprom->address, eeprom->input);
625
626 eeprom->contents[eeprom->address] = eeprom->input;
627 eeprom->mode = Chip9346_none; /* waiting for next command after CS cycle */
628 eeprom->tick = 0;
629 eeprom->input = 0;
630 }
631 break;
632
633 case Chip9346_data_write_all:
634 eeprom->input = (eeprom->input << 1) | (bit & 1);
635 if (eeprom->tick == 16)
636 {
637 int i;
638 for (i = 0; i < EEPROM_9346_SIZE; i++)
639 {
640 eeprom->contents[i] = eeprom->input;
641 }
642 DPRINTF("eeprom filled with data=0x%04x\n", eeprom->input);
643
644 eeprom->mode = Chip9346_enter_command_mode;
645 eeprom->tick = 0;
646 eeprom->input = 0;
647 }
648 break;
649
650 default:
651 break;
652 }
653 }
654
655 static int prom9346_get_wire(RTL8139State *s)
656 {
657 EEprom9346 *eeprom = &s->eeprom;
658 if (!eeprom->eecs)
659 return 0;
660
661 return eeprom->eedo;
662 }
663
664 /* FIXME: This should be merged into/replaced by eeprom93xx.c. */
665 static void prom9346_set_wire(RTL8139State *s, int eecs, int eesk, int eedi)
666 {
667 EEprom9346 *eeprom = &s->eeprom;
668 uint8_t old_eecs = eeprom->eecs;
669 uint8_t old_eesk = eeprom->eesk;
670
671 eeprom->eecs = eecs;
672 eeprom->eesk = eesk;
673 eeprom->eedi = eedi;
674
675 DPRINTF("eeprom: +++ wires CS=%d SK=%d DI=%d DO=%d\n", eeprom->eecs,
676 eeprom->eesk, eeprom->eedi, eeprom->eedo);
677
678 if (!old_eecs && eecs)
679 {
680 /* Synchronize start */
681 eeprom->tick = 0;
682 eeprom->input = 0;
683 eeprom->output = 0;
684 eeprom->mode = Chip9346_enter_command_mode;
685
686 DPRINTF("=== eeprom: begin access, enter command mode\n");
687 }
688
689 if (!eecs)
690 {
691 DPRINTF("=== eeprom: end access\n");
692 return;
693 }
694
695 if (!old_eesk && eesk)
696 {
697 /* SK front rules */
698 prom9346_shift_clock(eeprom);
699 }
700 }
701
702 static void rtl8139_update_irq(RTL8139State *s)
703 {
704 int isr;
705 isr = (s->IntrStatus & s->IntrMask) & 0xffff;
706
707 DPRINTF("Set IRQ to %d (%04x %04x)\n", isr ? 1 : 0, s->IntrStatus,
708 s->IntrMask);
709
710 qemu_set_irq(s->dev.irq[0], (isr != 0));
711 }
712
713 static int rtl8139_RxWrap(RTL8139State *s)
714 {
715 /* wrapping enabled; assume 1.5k more buffer space if size < 65536 */
716 return (s->RxConfig & (1 << 7));
717 }
718
719 static int rtl8139_receiver_enabled(RTL8139State *s)
720 {
721 return s->bChipCmdState & CmdRxEnb;
722 }
723
724 static int rtl8139_transmitter_enabled(RTL8139State *s)
725 {
726 return s->bChipCmdState & CmdTxEnb;
727 }
728
729 static int rtl8139_cp_receiver_enabled(RTL8139State *s)
730 {
731 return s->CpCmd & CPlusRxEnb;
732 }
733
734 static int rtl8139_cp_transmitter_enabled(RTL8139State *s)
735 {
736 return s->CpCmd & CPlusTxEnb;
737 }
738
739 static void rtl8139_write_buffer(RTL8139State *s, const void *buf, int size)
740 {
741 if (s->RxBufAddr + size > s->RxBufferSize)
742 {
743 int wrapped = MOD2(s->RxBufAddr + size, s->RxBufferSize);
744
745 /* write packet data */
746 if (wrapped && !(s->RxBufferSize < 65536 && rtl8139_RxWrap(s)))
747 {
748 DPRINTF(">>> rx packet wrapped in buffer at %d\n", size - wrapped);
749
750 if (size > wrapped)
751 {
752 pci_dma_write(&s->dev, s->RxBuf + s->RxBufAddr,
753 buf, size-wrapped);
754 }
755
756 /* reset buffer pointer */
757 s->RxBufAddr = 0;
758
759 pci_dma_write(&s->dev, s->RxBuf + s->RxBufAddr,
760 buf + (size-wrapped), wrapped);
761
762 s->RxBufAddr = wrapped;
763
764 return;
765 }
766 }
767
768 /* non-wrapping path or overwrapping enabled */
769 pci_dma_write(&s->dev, s->RxBuf + s->RxBufAddr, buf, size);
770
771 s->RxBufAddr += size;
772 }
773
774 #define MIN_BUF_SIZE 60
775 static inline dma_addr_t rtl8139_addr64(uint32_t low, uint32_t high)
776 {
777 #if TARGET_PHYS_ADDR_BITS > 32
778 return low | ((target_phys_addr_t)high << 32);
779 #else
780 return low;
781 #endif
782 }
783
784 static int rtl8139_can_receive(VLANClientState *nc)
785 {
786 RTL8139State *s = DO_UPCAST(NICState, nc, nc)->opaque;
787 int avail;
788
789 /* Receive (drop) packets if card is disabled. */
790 if (!s->clock_enabled)
791 return 1;
792 if (!rtl8139_receiver_enabled(s))
793 return 1;
794 /* network/host communication happens only in normal mode */
795 if ((s->Cfg9346 & Chip9346_op_mask) != Cfg9346_Normal)
796 return 0;
797
798 if (rtl8139_cp_receiver_enabled(s)) {
799 /* ??? Flow control not implemented in c+ mode.
800 This is a hack to work around slirp deficiencies anyway. */
801 return 1;
802 } else {
803 avail = MOD2(s->RxBufferSize + s->RxBufPtr - s->RxBufAddr,
804 s->RxBufferSize);
805 return (avail == 0 || avail >= 1514);
806 }
807 }
808
809 static ssize_t rtl8139_do_receive(VLANClientState *nc, const uint8_t *buf, size_t size_, int do_interrupt)
810 {
811 RTL8139State *s = DO_UPCAST(NICState, nc, nc)->opaque;
812 /* size is the length of the buffer passed to the driver */
813 int size = size_;
814 const uint8_t *dot1q_buf = NULL;
815
816 uint32_t packet_header = 0;
817
818 uint8_t buf1[MIN_BUF_SIZE + VLAN_HLEN];
819 static const uint8_t broadcast_macaddr[6] =
820 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
821
822 DPRINTF(">>> received len=%d\n", size);
823
824 /* test if board clock is stopped */
825 if (!s->clock_enabled)
826 {
827 DPRINTF("stopped ==========================\n");
828 return -1;
829 }
830
831 /* first check if receiver is enabled */
832
833 if (!rtl8139_receiver_enabled(s))
834 {
835 DPRINTF("receiver disabled ================\n");
836 return -1;
837 }
838
839 /* check whether we are in normal mode */
840 if ((s->Cfg9346 & Chip9346_op_mask) != Cfg9346_Normal) {
841 DPRINTF("not in normal op mode\n");
842 return -1;
843 }
844
845 /* XXX: check this */
846 if (s->RxConfig & AcceptAllPhys) {
847 /* promiscuous: receive all */
848 DPRINTF(">>> packet received in promiscuous mode\n");
849
850 } else {
851 if (!memcmp(buf, broadcast_macaddr, 6)) {
852 /* broadcast address */
853 if (!(s->RxConfig & AcceptBroadcast))
854 {
855 DPRINTF(">>> broadcast packet rejected\n");
856
857 /* update tally counter */
858 ++s->tally_counters.RxERR;
859
860 return size;
861 }
862
863 packet_header |= RxBroadcast;
864
865 DPRINTF(">>> broadcast packet received\n");
866
867 /* update tally counter */
868 ++s->tally_counters.RxOkBrd;
869
870 } else if (buf[0] & 0x01) {
871 /* multicast */
872 if (!(s->RxConfig & AcceptMulticast))
873 {
874 DPRINTF(">>> multicast packet rejected\n");
875
876 /* update tally counter */
877 ++s->tally_counters.RxERR;
878
879 return size;
880 }
881
882 int mcast_idx = compute_mcast_idx(buf);
883
884 if (!(s->mult[mcast_idx >> 3] & (1 << (mcast_idx & 7))))
885 {
886 DPRINTF(">>> multicast address mismatch\n");
887
888 /* update tally counter */
889 ++s->tally_counters.RxERR;
890
891 return size;
892 }
893
894 packet_header |= RxMulticast;
895
896 DPRINTF(">>> multicast packet received\n");
897
898 /* update tally counter */
899 ++s->tally_counters.RxOkMul;
900
901 } else if (s->phys[0] == buf[0] &&
902 s->phys[1] == buf[1] &&
903 s->phys[2] == buf[2] &&
904 s->phys[3] == buf[3] &&
905 s->phys[4] == buf[4] &&
906 s->phys[5] == buf[5]) {
907 /* match */
908 if (!(s->RxConfig & AcceptMyPhys))
909 {
910 DPRINTF(">>> rejecting physical address matching packet\n");
911
912 /* update tally counter */
913 ++s->tally_counters.RxERR;
914
915 return size;
916 }
917
918 packet_header |= RxPhysical;
919
920 DPRINTF(">>> physical address matching packet received\n");
921
922 /* update tally counter */
923 ++s->tally_counters.RxOkPhy;
924
925 } else {
926
927 DPRINTF(">>> unknown packet\n");
928
929 /* update tally counter */
930 ++s->tally_counters.RxERR;
931
932 return size;
933 }
934 }
935
936 /* if too small buffer, then expand it
937 * Include some tailroom in case a vlan tag is later removed. */
938 if (size < MIN_BUF_SIZE + VLAN_HLEN) {
939 memcpy(buf1, buf, size);
940 memset(buf1 + size, 0, MIN_BUF_SIZE + VLAN_HLEN - size);
941 buf = buf1;
942 if (size < MIN_BUF_SIZE) {
943 size = MIN_BUF_SIZE;
944 }
945 }
946
947 if (rtl8139_cp_receiver_enabled(s))
948 {
949 DPRINTF("in C+ Rx mode ================\n");
950
951 /* begin C+ receiver mode */
952
953 /* w0 ownership flag */
954 #define CP_RX_OWN (1<<31)
955 /* w0 end of ring flag */
956 #define CP_RX_EOR (1<<30)
957 /* w0 bits 0...12 : buffer size */
958 #define CP_RX_BUFFER_SIZE_MASK ((1<<13) - 1)
959 /* w1 tag available flag */
960 #define CP_RX_TAVA (1<<16)
961 /* w1 bits 0...15 : VLAN tag */
962 #define CP_RX_VLAN_TAG_MASK ((1<<16) - 1)
963 /* w2 low 32bit of Rx buffer ptr */
964 /* w3 high 32bit of Rx buffer ptr */
965
966 int descriptor = s->currCPlusRxDesc;
967 dma_addr_t cplus_rx_ring_desc;
968
969 cplus_rx_ring_desc = rtl8139_addr64(s->RxRingAddrLO, s->RxRingAddrHI);
970 cplus_rx_ring_desc += 16 * descriptor;
971
972 DPRINTF("+++ C+ mode reading RX descriptor %d from host memory at "
973 "%08x %08x = "DMA_ADDR_FMT"\n", descriptor, s->RxRingAddrHI,
974 s->RxRingAddrLO, cplus_rx_ring_desc);
975
976 uint32_t val, rxdw0,rxdw1,rxbufLO,rxbufHI;
977
978 pci_dma_read(&s->dev, cplus_rx_ring_desc, &val, 4);
979 rxdw0 = le32_to_cpu(val);
980 pci_dma_read(&s->dev, cplus_rx_ring_desc+4, &val, 4);
981 rxdw1 = le32_to_cpu(val);
982 pci_dma_read(&s->dev, cplus_rx_ring_desc+8, &val, 4);
983 rxbufLO = le32_to_cpu(val);
984 pci_dma_read(&s->dev, cplus_rx_ring_desc+12, &val, 4);
985 rxbufHI = le32_to_cpu(val);
986
987 DPRINTF("+++ C+ mode RX descriptor %d %08x %08x %08x %08x\n",
988 descriptor, rxdw0, rxdw1, rxbufLO, rxbufHI);
989
990 if (!(rxdw0 & CP_RX_OWN))
991 {
992 DPRINTF("C+ Rx mode : descriptor %d is owned by host\n",
993 descriptor);
994
995 s->IntrStatus |= RxOverflow;
996 ++s->RxMissed;
997
998 /* update tally counter */
999 ++s->tally_counters.RxERR;
1000 ++s->tally_counters.MissPkt;
1001
1002 rtl8139_update_irq(s);
1003 return size_;
1004 }
1005
1006 uint32_t rx_space = rxdw0 & CP_RX_BUFFER_SIZE_MASK;
1007
1008 /* write VLAN info to descriptor variables. */
1009 if (s->CpCmd & CPlusRxVLAN && be16_to_cpup((uint16_t *)
1010 &buf[ETHER_ADDR_LEN * 2]) == ETH_P_8021Q) {
1011 dot1q_buf = &buf[ETHER_ADDR_LEN * 2];
1012 size -= VLAN_HLEN;
1013 /* if too small buffer, use the tailroom added duing expansion */
1014 if (size < MIN_BUF_SIZE) {
1015 size = MIN_BUF_SIZE;
1016 }
1017
1018 rxdw1 &= ~CP_RX_VLAN_TAG_MASK;
1019 /* BE + ~le_to_cpu()~ + cpu_to_le() = BE */
1020 rxdw1 |= CP_RX_TAVA | le16_to_cpup((uint16_t *)
1021 &dot1q_buf[ETHER_TYPE_LEN]);
1022
1023 DPRINTF("C+ Rx mode : extracted vlan tag with tci: ""%u\n",
1024 be16_to_cpup((uint16_t *)&dot1q_buf[ETHER_TYPE_LEN]));
1025 } else {
1026 /* reset VLAN tag flag */
1027 rxdw1 &= ~CP_RX_TAVA;
1028 }
1029
1030 /* TODO: scatter the packet over available receive ring descriptors space */
1031
1032 if (size+4 > rx_space)
1033 {
1034 DPRINTF("C+ Rx mode : descriptor %d size %d received %d + 4\n",
1035 descriptor, rx_space, size);
1036
1037 s->IntrStatus |= RxOverflow;
1038 ++s->RxMissed;
1039
1040 /* update tally counter */
1041 ++s->tally_counters.RxERR;
1042 ++s->tally_counters.MissPkt;
1043
1044 rtl8139_update_irq(s);
1045 return size_;
1046 }
1047
1048 dma_addr_t rx_addr = rtl8139_addr64(rxbufLO, rxbufHI);
1049
1050 /* receive/copy to target memory */
1051 if (dot1q_buf) {
1052 pci_dma_write(&s->dev, rx_addr, buf, 2 * ETHER_ADDR_LEN);
1053 pci_dma_write(&s->dev, rx_addr + 2 * ETHER_ADDR_LEN,
1054 buf + 2 * ETHER_ADDR_LEN + VLAN_HLEN,
1055 size - 2 * ETHER_ADDR_LEN);
1056 } else {
1057 pci_dma_write(&s->dev, rx_addr, buf, size);
1058 }
1059
1060 if (s->CpCmd & CPlusRxChkSum)
1061 {
1062 /* do some packet checksumming */
1063 }
1064
1065 /* write checksum */
1066 val = cpu_to_le32(crc32(0, buf, size_));
1067 pci_dma_write(&s->dev, rx_addr+size, (uint8_t *)&val, 4);
1068
1069 /* first segment of received packet flag */
1070 #define CP_RX_STATUS_FS (1<<29)
1071 /* last segment of received packet flag */
1072 #define CP_RX_STATUS_LS (1<<28)
1073 /* multicast packet flag */
1074 #define CP_RX_STATUS_MAR (1<<26)
1075 /* physical-matching packet flag */
1076 #define CP_RX_STATUS_PAM (1<<25)
1077 /* broadcast packet flag */
1078 #define CP_RX_STATUS_BAR (1<<24)
1079 /* runt packet flag */
1080 #define CP_RX_STATUS_RUNT (1<<19)
1081 /* crc error flag */
1082 #define CP_RX_STATUS_CRC (1<<18)
1083 /* IP checksum error flag */
1084 #define CP_RX_STATUS_IPF (1<<15)
1085 /* UDP checksum error flag */
1086 #define CP_RX_STATUS_UDPF (1<<14)
1087 /* TCP checksum error flag */
1088 #define CP_RX_STATUS_TCPF (1<<13)
1089
1090 /* transfer ownership to target */
1091 rxdw0 &= ~CP_RX_OWN;
1092
1093 /* set first segment bit */
1094 rxdw0 |= CP_RX_STATUS_FS;
1095
1096 /* set last segment bit */
1097 rxdw0 |= CP_RX_STATUS_LS;
1098
1099 /* set received packet type flags */
1100 if (packet_header & RxBroadcast)
1101 rxdw0 |= CP_RX_STATUS_BAR;
1102 if (packet_header & RxMulticast)
1103 rxdw0 |= CP_RX_STATUS_MAR;
1104 if (packet_header & RxPhysical)
1105 rxdw0 |= CP_RX_STATUS_PAM;
1106
1107 /* set received size */
1108 rxdw0 &= ~CP_RX_BUFFER_SIZE_MASK;
1109 rxdw0 |= (size+4);
1110
1111 /* update ring data */
1112 val = cpu_to_le32(rxdw0);
1113 pci_dma_write(&s->dev, cplus_rx_ring_desc, (uint8_t *)&val, 4);
1114 val = cpu_to_le32(rxdw1);
1115 pci_dma_write(&s->dev, cplus_rx_ring_desc+4, (uint8_t *)&val, 4);
1116
1117 /* update tally counter */
1118 ++s->tally_counters.RxOk;
1119
1120 /* seek to next Rx descriptor */
1121 if (rxdw0 & CP_RX_EOR)
1122 {
1123 s->currCPlusRxDesc = 0;
1124 }
1125 else
1126 {
1127 ++s->currCPlusRxDesc;
1128 }
1129
1130 DPRINTF("done C+ Rx mode ----------------\n");
1131
1132 }
1133 else
1134 {
1135 DPRINTF("in ring Rx mode ================\n");
1136
1137 /* begin ring receiver mode */
1138 int avail = MOD2(s->RxBufferSize + s->RxBufPtr - s->RxBufAddr, s->RxBufferSize);
1139
1140 /* if receiver buffer is empty then avail == 0 */
1141
1142 if (avail != 0 && size + 8 >= avail)
1143 {
1144 DPRINTF("rx overflow: rx buffer length %d head 0x%04x "
1145 "read 0x%04x === available 0x%04x need 0x%04x\n",
1146 s->RxBufferSize, s->RxBufAddr, s->RxBufPtr, avail, size + 8);
1147
1148 s->IntrStatus |= RxOverflow;
1149 ++s->RxMissed;
1150 rtl8139_update_irq(s);
1151 return size_;
1152 }
1153
1154 packet_header |= RxStatusOK;
1155
1156 packet_header |= (((size+4) << 16) & 0xffff0000);
1157
1158 /* write header */
1159 uint32_t val = cpu_to_le32(packet_header);
1160
1161 rtl8139_write_buffer(s, (uint8_t *)&val, 4);
1162
1163 rtl8139_write_buffer(s, buf, size);
1164
1165 /* write checksum */
1166 val = cpu_to_le32(crc32(0, buf, size));
1167 rtl8139_write_buffer(s, (uint8_t *)&val, 4);
1168
1169 /* correct buffer write pointer */
1170 s->RxBufAddr = MOD2((s->RxBufAddr + 3) & ~0x3, s->RxBufferSize);
1171
1172 /* now we can signal we have received something */
1173
1174 DPRINTF("received: rx buffer length %d head 0x%04x read 0x%04x\n",
1175 s->RxBufferSize, s->RxBufAddr, s->RxBufPtr);
1176 }
1177
1178 s->IntrStatus |= RxOK;
1179
1180 if (do_interrupt)
1181 {
1182 rtl8139_update_irq(s);
1183 }
1184
1185 return size_;
1186 }
1187
1188 static ssize_t rtl8139_receive(VLANClientState *nc, const uint8_t *buf, size_t size)
1189 {
1190 return rtl8139_do_receive(nc, buf, size, 1);
1191 }
1192
1193 static void rtl8139_reset_rxring(RTL8139State *s, uint32_t bufferSize)
1194 {
1195 s->RxBufferSize = bufferSize;
1196 s->RxBufPtr = 0;
1197 s->RxBufAddr = 0;
1198 }
1199
1200 static void rtl8139_reset(DeviceState *d)
1201 {
1202 RTL8139State *s = container_of(d, RTL8139State, dev.qdev);
1203 int i;
1204
1205 /* restore MAC address */
1206 memcpy(s->phys, s->conf.macaddr.a, 6);
1207
1208 /* reset interrupt mask */
1209 s->IntrStatus = 0;
1210 s->IntrMask = 0;
1211
1212 rtl8139_update_irq(s);
1213
1214 /* mark all status registers as owned by host */
1215 for (i = 0; i < 4; ++i)
1216 {
1217 s->TxStatus[i] = TxHostOwns;
1218 }
1219
1220 s->currTxDesc = 0;
1221 s->currCPlusRxDesc = 0;
1222 s->currCPlusTxDesc = 0;
1223
1224 s->RxRingAddrLO = 0;
1225 s->RxRingAddrHI = 0;
1226
1227 s->RxBuf = 0;
1228
1229 rtl8139_reset_rxring(s, 8192);
1230
1231 /* ACK the reset */
1232 s->TxConfig = 0;
1233
1234 #if 0
1235 // s->TxConfig |= HW_REVID(1, 0, 0, 0, 0, 0, 0); // RTL-8139 HasHltClk
1236 s->clock_enabled = 0;
1237 #else
1238 s->TxConfig |= HW_REVID(1, 1, 1, 0, 1, 1, 0); // RTL-8139C+ HasLWake
1239 s->clock_enabled = 1;
1240 #endif
1241
1242 s->bChipCmdState = CmdReset; /* RxBufEmpty bit is calculated on read from ChipCmd */;
1243
1244 /* set initial state data */
1245 s->Config0 = 0x0; /* No boot ROM */
1246 s->Config1 = 0xC; /* IO mapped and MEM mapped registers available */
1247 s->Config3 = 0x1; /* fast back-to-back compatible */
1248 s->Config5 = 0x0;
1249
1250 s->CSCR = CSCR_F_LINK_100 | CSCR_HEART_BIT | CSCR_LD;
1251
1252 s->CpCmd = 0x0; /* reset C+ mode */
1253 s->cplus_enabled = 0;
1254
1255
1256 // s->BasicModeCtrl = 0x3100; // 100Mbps, full duplex, autonegotiation
1257 // s->BasicModeCtrl = 0x2100; // 100Mbps, full duplex
1258 s->BasicModeCtrl = 0x1000; // autonegotiation
1259
1260 s->BasicModeStatus = 0x7809;
1261 //s->BasicModeStatus |= 0x0040; /* UTP medium */
1262 s->BasicModeStatus |= 0x0020; /* autonegotiation completed */
1263 s->BasicModeStatus |= 0x0004; /* link is up */
1264
1265 s->NWayAdvert = 0x05e1; /* all modes, full duplex */
1266 s->NWayLPAR = 0x05e1; /* all modes, full duplex */
1267 s->NWayExpansion = 0x0001; /* autonegotiation supported */
1268
1269 /* also reset timer and disable timer interrupt */
1270 s->TCTR = 0;
1271 s->TimerInt = 0;
1272 s->TCTR_base = 0;
1273
1274 /* reset tally counters */
1275 RTL8139TallyCounters_clear(&s->tally_counters);
1276 }
1277
1278 static void RTL8139TallyCounters_clear(RTL8139TallyCounters* counters)
1279 {
1280 counters->TxOk = 0;
1281 counters->RxOk = 0;
1282 counters->TxERR = 0;
1283 counters->RxERR = 0;
1284 counters->MissPkt = 0;
1285 counters->FAE = 0;
1286 counters->Tx1Col = 0;
1287 counters->TxMCol = 0;
1288 counters->RxOkPhy = 0;
1289 counters->RxOkBrd = 0;
1290 counters->RxOkMul = 0;
1291 counters->TxAbt = 0;
1292 counters->TxUndrn = 0;
1293 }
1294
1295 static void RTL8139TallyCounters_dma_write(RTL8139State *s, dma_addr_t tc_addr)
1296 {
1297 RTL8139TallyCounters *tally_counters = &s->tally_counters;
1298 uint16_t val16;
1299 uint32_t val32;
1300 uint64_t val64;
1301
1302 val64 = cpu_to_le64(tally_counters->TxOk);
1303 pci_dma_write(&s->dev, tc_addr + 0, (uint8_t *)&val64, 8);
1304
1305 val64 = cpu_to_le64(tally_counters->RxOk);
1306 pci_dma_write(&s->dev, tc_addr + 8, (uint8_t *)&val64, 8);
1307
1308 val64 = cpu_to_le64(tally_counters->TxERR);
1309 pci_dma_write(&s->dev, tc_addr + 16, (uint8_t *)&val64, 8);
1310
1311 val32 = cpu_to_le32(tally_counters->RxERR);
1312 pci_dma_write(&s->dev, tc_addr + 24, (uint8_t *)&val32, 4);
1313
1314 val16 = cpu_to_le16(tally_counters->MissPkt);
1315 pci_dma_write(&s->dev, tc_addr + 28, (uint8_t *)&val16, 2);
1316
1317 val16 = cpu_to_le16(tally_counters->FAE);
1318 pci_dma_write(&s->dev, tc_addr + 30, (uint8_t *)&val16, 2);
1319
1320 val32 = cpu_to_le32(tally_counters->Tx1Col);
1321 pci_dma_write(&s->dev, tc_addr + 32, (uint8_t *)&val32, 4);
1322
1323 val32 = cpu_to_le32(tally_counters->TxMCol);
1324 pci_dma_write(&s->dev, tc_addr + 36, (uint8_t *)&val32, 4);
1325
1326 val64 = cpu_to_le64(tally_counters->RxOkPhy);
1327 pci_dma_write(&s->dev, tc_addr + 40, (uint8_t *)&val64, 8);
1328
1329 val64 = cpu_to_le64(tally_counters->RxOkBrd);
1330 pci_dma_write(&s->dev, tc_addr + 48, (uint8_t *)&val64, 8);
1331
1332 val32 = cpu_to_le32(tally_counters->RxOkMul);
1333 pci_dma_write(&s->dev, tc_addr + 56, (uint8_t *)&val32, 4);
1334
1335 val16 = cpu_to_le16(tally_counters->TxAbt);
1336 pci_dma_write(&s->dev, tc_addr + 60, (uint8_t *)&val16, 2);
1337
1338 val16 = cpu_to_le16(tally_counters->TxUndrn);
1339 pci_dma_write(&s->dev, tc_addr + 62, (uint8_t *)&val16, 2);
1340 }
1341
1342 /* Loads values of tally counters from VM state file */
1343
1344 static const VMStateDescription vmstate_tally_counters = {
1345 .name = "tally_counters",
1346 .version_id = 1,
1347 .minimum_version_id = 1,
1348 .minimum_version_id_old = 1,
1349 .fields = (VMStateField []) {
1350 VMSTATE_UINT64(TxOk, RTL8139TallyCounters),
1351 VMSTATE_UINT64(RxOk, RTL8139TallyCounters),
1352 VMSTATE_UINT64(TxERR, RTL8139TallyCounters),
1353 VMSTATE_UINT32(RxERR, RTL8139TallyCounters),
1354 VMSTATE_UINT16(MissPkt, RTL8139TallyCounters),
1355 VMSTATE_UINT16(FAE, RTL8139TallyCounters),
1356 VMSTATE_UINT32(Tx1Col, RTL8139TallyCounters),
1357 VMSTATE_UINT32(TxMCol, RTL8139TallyCounters),
1358 VMSTATE_UINT64(RxOkPhy, RTL8139TallyCounters),
1359 VMSTATE_UINT64(RxOkBrd, RTL8139TallyCounters),
1360 VMSTATE_UINT16(TxAbt, RTL8139TallyCounters),
1361 VMSTATE_UINT16(TxUndrn, RTL8139TallyCounters),
1362 VMSTATE_END_OF_LIST()
1363 }
1364 };
1365
1366 static void rtl8139_ChipCmd_write(RTL8139State *s, uint32_t val)
1367 {
1368 val &= 0xff;
1369
1370 DPRINTF("ChipCmd write val=0x%08x\n", val);
1371
1372 if (val & CmdReset)
1373 {
1374 DPRINTF("ChipCmd reset\n");
1375 rtl8139_reset(&s->dev.qdev);
1376 }
1377 if (val & CmdRxEnb)
1378 {
1379 DPRINTF("ChipCmd enable receiver\n");
1380
1381 s->currCPlusRxDesc = 0;
1382 }
1383 if (val & CmdTxEnb)
1384 {
1385 DPRINTF("ChipCmd enable transmitter\n");
1386
1387 s->currCPlusTxDesc = 0;
1388 }
1389
1390 /* mask unwritable bits */
1391 val = SET_MASKED(val, 0xe3, s->bChipCmdState);
1392
1393 /* Deassert reset pin before next read */
1394 val &= ~CmdReset;
1395
1396 s->bChipCmdState = val;
1397 }
1398
1399 static int rtl8139_RxBufferEmpty(RTL8139State *s)
1400 {
1401 int unread = MOD2(s->RxBufferSize + s->RxBufAddr - s->RxBufPtr, s->RxBufferSize);
1402
1403 if (unread != 0)
1404 {
1405 DPRINTF("receiver buffer data available 0x%04x\n", unread);
1406 return 0;
1407 }
1408
1409 DPRINTF("receiver buffer is empty\n");
1410
1411 return 1;
1412 }
1413
1414 static uint32_t rtl8139_ChipCmd_read(RTL8139State *s)
1415 {
1416 uint32_t ret = s->bChipCmdState;
1417
1418 if (rtl8139_RxBufferEmpty(s))
1419 ret |= RxBufEmpty;
1420
1421 DPRINTF("ChipCmd read val=0x%04x\n", ret);
1422
1423 return ret;
1424 }
1425
1426 static void rtl8139_CpCmd_write(RTL8139State *s, uint32_t val)
1427 {
1428 val &= 0xffff;
1429
1430 DPRINTF("C+ command register write(w) val=0x%04x\n", val);
1431
1432 s->cplus_enabled = 1;
1433
1434 /* mask unwritable bits */
1435 val = SET_MASKED(val, 0xff84, s->CpCmd);
1436
1437 s->CpCmd = val;
1438 }
1439
1440 static uint32_t rtl8139_CpCmd_read(RTL8139State *s)
1441 {
1442 uint32_t ret = s->CpCmd;
1443
1444 DPRINTF("C+ command register read(w) val=0x%04x\n", ret);
1445
1446 return ret;
1447 }
1448
1449 static void rtl8139_IntrMitigate_write(RTL8139State *s, uint32_t val)
1450 {
1451 DPRINTF("C+ IntrMitigate register write(w) val=0x%04x\n", val);
1452 }
1453
1454 static uint32_t rtl8139_IntrMitigate_read(RTL8139State *s)
1455 {
1456 uint32_t ret = 0;
1457
1458 DPRINTF("C+ IntrMitigate register read(w) val=0x%04x\n", ret);
1459
1460 return ret;
1461 }
1462
1463 static int rtl8139_config_writable(RTL8139State *s)
1464 {
1465 if ((s->Cfg9346 & Chip9346_op_mask) == Cfg9346_ConfigWrite)
1466 {
1467 return 1;
1468 }
1469
1470 DPRINTF("Configuration registers are write-protected\n");
1471
1472 return 0;
1473 }
1474
1475 static void rtl8139_BasicModeCtrl_write(RTL8139State *s, uint32_t val)
1476 {
1477 val &= 0xffff;
1478
1479 DPRINTF("BasicModeCtrl register write(w) val=0x%04x\n", val);
1480
1481 /* mask unwritable bits */
1482 uint32_t mask = 0x4cff;
1483
1484 if (1 || !rtl8139_config_writable(s))
1485 {
1486 /* Speed setting and autonegotiation enable bits are read-only */
1487 mask |= 0x3000;
1488 /* Duplex mode setting is read-only */
1489 mask |= 0x0100;
1490 }
1491
1492 val = SET_MASKED(val, mask, s->BasicModeCtrl);
1493
1494 s->BasicModeCtrl = val;
1495 }
1496
1497 static uint32_t rtl8139_BasicModeCtrl_read(RTL8139State *s)
1498 {
1499 uint32_t ret = s->BasicModeCtrl;
1500
1501 DPRINTF("BasicModeCtrl register read(w) val=0x%04x\n", ret);
1502
1503 return ret;
1504 }
1505
1506 static void rtl8139_BasicModeStatus_write(RTL8139State *s, uint32_t val)
1507 {
1508 val &= 0xffff;
1509
1510 DPRINTF("BasicModeStatus register write(w) val=0x%04x\n", val);
1511
1512 /* mask unwritable bits */
1513 val = SET_MASKED(val, 0xff3f, s->BasicModeStatus);
1514
1515 s->BasicModeStatus = val;
1516 }
1517
1518 static uint32_t rtl8139_BasicModeStatus_read(RTL8139State *s)
1519 {
1520 uint32_t ret = s->BasicModeStatus;
1521
1522 DPRINTF("BasicModeStatus register read(w) val=0x%04x\n", ret);
1523
1524 return ret;
1525 }
1526
1527 static void rtl8139_Cfg9346_write(RTL8139State *s, uint32_t val)
1528 {
1529 val &= 0xff;
1530
1531 DPRINTF("Cfg9346 write val=0x%02x\n", val);
1532
1533 /* mask unwritable bits */
1534 val = SET_MASKED(val, 0x31, s->Cfg9346);
1535
1536 uint32_t opmode = val & 0xc0;
1537 uint32_t eeprom_val = val & 0xf;
1538
1539 if (opmode == 0x80) {
1540 /* eeprom access */
1541 int eecs = (eeprom_val & 0x08)?1:0;
1542 int eesk = (eeprom_val & 0x04)?1:0;
1543 int eedi = (eeprom_val & 0x02)?1:0;
1544 prom9346_set_wire(s, eecs, eesk, eedi);
1545 } else if (opmode == 0x40) {
1546 /* Reset. */
1547 val = 0;
1548 rtl8139_reset(&s->dev.qdev);
1549 }
1550
1551 s->Cfg9346 = val;
1552 }
1553
1554 static uint32_t rtl8139_Cfg9346_read(RTL8139State *s)
1555 {
1556 uint32_t ret = s->Cfg9346;
1557
1558 uint32_t opmode = ret & 0xc0;
1559
1560 if (opmode == 0x80)
1561 {
1562 /* eeprom access */
1563 int eedo = prom9346_get_wire(s);
1564 if (eedo)
1565 {
1566 ret |= 0x01;
1567 }
1568 else
1569 {
1570 ret &= ~0x01;
1571 }
1572 }
1573
1574 DPRINTF("Cfg9346 read val=0x%02x\n", ret);
1575
1576 return ret;
1577 }
1578
1579 static void rtl8139_Config0_write(RTL8139State *s, uint32_t val)
1580 {
1581 val &= 0xff;
1582
1583 DPRINTF("Config0 write val=0x%02x\n", val);
1584
1585 if (!rtl8139_config_writable(s)) {
1586 return;
1587 }
1588
1589 /* mask unwritable bits */
1590 val = SET_MASKED(val, 0xf8, s->Config0);
1591
1592 s->Config0 = val;
1593 }
1594
1595 static uint32_t rtl8139_Config0_read(RTL8139State *s)
1596 {
1597 uint32_t ret = s->Config0;
1598
1599 DPRINTF("Config0 read val=0x%02x\n", ret);
1600
1601 return ret;
1602 }
1603
1604 static void rtl8139_Config1_write(RTL8139State *s, uint32_t val)
1605 {
1606 val &= 0xff;
1607
1608 DPRINTF("Config1 write val=0x%02x\n", val);
1609
1610 if (!rtl8139_config_writable(s)) {
1611 return;
1612 }
1613
1614 /* mask unwritable bits */
1615 val = SET_MASKED(val, 0xC, s->Config1);
1616
1617 s->Config1 = val;
1618 }
1619
1620 static uint32_t rtl8139_Config1_read(RTL8139State *s)
1621 {
1622 uint32_t ret = s->Config1;
1623
1624 DPRINTF("Config1 read val=0x%02x\n", ret);
1625
1626 return ret;
1627 }
1628
1629 static void rtl8139_Config3_write(RTL8139State *s, uint32_t val)
1630 {
1631 val &= 0xff;
1632
1633 DPRINTF("Config3 write val=0x%02x\n", val);
1634
1635 if (!rtl8139_config_writable(s)) {
1636 return;
1637 }
1638
1639 /* mask unwritable bits */
1640 val = SET_MASKED(val, 0x8F, s->Config3);
1641
1642 s->Config3 = val;
1643 }
1644
1645 static uint32_t rtl8139_Config3_read(RTL8139State *s)
1646 {
1647 uint32_t ret = s->Config3;
1648
1649 DPRINTF("Config3 read val=0x%02x\n", ret);
1650
1651 return ret;
1652 }
1653
1654 static void rtl8139_Config4_write(RTL8139State *s, uint32_t val)
1655 {
1656 val &= 0xff;
1657
1658 DPRINTF("Config4 write val=0x%02x\n", val);
1659
1660 if (!rtl8139_config_writable(s)) {
1661 return;
1662 }
1663
1664 /* mask unwritable bits */
1665 val = SET_MASKED(val, 0x0a, s->Config4);
1666
1667 s->Config4 = val;
1668 }
1669
1670 static uint32_t rtl8139_Config4_read(RTL8139State *s)
1671 {
1672 uint32_t ret = s->Config4;
1673
1674 DPRINTF("Config4 read val=0x%02x\n", ret);
1675
1676 return ret;
1677 }
1678
1679 static void rtl8139_Config5_write(RTL8139State *s, uint32_t val)
1680 {
1681 val &= 0xff;
1682
1683 DPRINTF("Config5 write val=0x%02x\n", val);
1684
1685 /* mask unwritable bits */
1686 val = SET_MASKED(val, 0x80, s->Config5);
1687
1688 s->Config5 = val;
1689 }
1690
1691 static uint32_t rtl8139_Config5_read(RTL8139State *s)
1692 {
1693 uint32_t ret = s->Config5;
1694
1695 DPRINTF("Config5 read val=0x%02x\n", ret);
1696
1697 return ret;
1698 }
1699
1700 static void rtl8139_TxConfig_write(RTL8139State *s, uint32_t val)
1701 {
1702 if (!rtl8139_transmitter_enabled(s))
1703 {
1704 DPRINTF("transmitter disabled; no TxConfig write val=0x%08x\n", val);
1705 return;
1706 }
1707
1708 DPRINTF("TxConfig write val=0x%08x\n", val);
1709
1710 val = SET_MASKED(val, TxVersionMask | 0x8070f80f, s->TxConfig);
1711
1712 s->TxConfig = val;
1713 }
1714
1715 static void rtl8139_TxConfig_writeb(RTL8139State *s, uint32_t val)
1716 {
1717 DPRINTF("RTL8139C TxConfig via write(b) val=0x%02x\n", val);
1718
1719 uint32_t tc = s->TxConfig;
1720 tc &= 0xFFFFFF00;
1721 tc |= (val & 0x000000FF);
1722 rtl8139_TxConfig_write(s, tc);
1723 }
1724
1725 static uint32_t rtl8139_TxConfig_read(RTL8139State *s)
1726 {
1727 uint32_t ret = s->TxConfig;
1728
1729 DPRINTF("TxConfig read val=0x%04x\n", ret);
1730
1731 return ret;
1732 }
1733
1734 static void rtl8139_RxConfig_write(RTL8139State *s, uint32_t val)
1735 {
1736 DPRINTF("RxConfig write val=0x%08x\n", val);
1737
1738 /* mask unwritable bits */
1739 val = SET_MASKED(val, 0xf0fc0040, s->RxConfig);
1740
1741 s->RxConfig = val;
1742
1743 /* reset buffer size and read/write pointers */
1744 rtl8139_reset_rxring(s, 8192 << ((s->RxConfig >> 11) & 0x3));
1745
1746 DPRINTF("RxConfig write reset buffer size to %d\n", s->RxBufferSize);
1747 }
1748
1749 static uint32_t rtl8139_RxConfig_read(RTL8139State *s)
1750 {
1751 uint32_t ret = s->RxConfig;
1752
1753 DPRINTF("RxConfig read val=0x%08x\n", ret);
1754
1755 return ret;
1756 }
1757
1758 static void rtl8139_transfer_frame(RTL8139State *s, uint8_t *buf, int size,
1759 int do_interrupt, const uint8_t *dot1q_buf)
1760 {
1761 struct iovec *iov = NULL;
1762
1763 if (!size)
1764 {
1765 DPRINTF("+++ empty ethernet frame\n");
1766 return;
1767 }
1768
1769 if (dot1q_buf && size >= ETHER_ADDR_LEN * 2) {
1770 iov = (struct iovec[3]) {
1771 { .iov_base = buf, .iov_len = ETHER_ADDR_LEN * 2 },
1772 { .iov_base = (void *) dot1q_buf, .iov_len = VLAN_HLEN },
1773 { .iov_base = buf + ETHER_ADDR_LEN * 2,
1774 .iov_len = size - ETHER_ADDR_LEN * 2 },
1775 };
1776 }
1777
1778 if (TxLoopBack == (s->TxConfig & TxLoopBack))
1779 {
1780 size_t buf2_size;
1781 uint8_t *buf2;
1782
1783 if (iov) {
1784 buf2_size = iov_size(iov, 3);
1785 buf2 = g_malloc(buf2_size);
1786 iov_to_buf(iov, 3, buf2, 0, buf2_size);
1787 buf = buf2;
1788 }
1789
1790 DPRINTF("+++ transmit loopback mode\n");
1791 rtl8139_do_receive(&s->nic->nc, buf, size, do_interrupt);
1792
1793 if (iov) {
1794 g_free(buf2);
1795 }
1796 }
1797 else
1798 {
1799 if (iov) {
1800 qemu_sendv_packet(&s->nic->nc, iov, 3);
1801 } else {
1802 qemu_send_packet(&s->nic->nc, buf, size);
1803 }
1804 }
1805 }
1806
1807 static int rtl8139_transmit_one(RTL8139State *s, int descriptor)
1808 {
1809 if (!rtl8139_transmitter_enabled(s))
1810 {
1811 DPRINTF("+++ cannot transmit from descriptor %d: transmitter "
1812 "disabled\n", descriptor);
1813 return 0;
1814 }
1815
1816 if (s->TxStatus[descriptor] & TxHostOwns)
1817 {
1818 DPRINTF("+++ cannot transmit from descriptor %d: owned by host "
1819 "(%08x)\n", descriptor, s->TxStatus[descriptor]);
1820 return 0;
1821 }
1822
1823 DPRINTF("+++ transmitting from descriptor %d\n", descriptor);
1824
1825 int txsize = s->TxStatus[descriptor] & 0x1fff;
1826 uint8_t txbuffer[0x2000];
1827
1828 DPRINTF("+++ transmit reading %d bytes from host memory at 0x%08x\n",
1829 txsize, s->TxAddr[descriptor]);
1830
1831 pci_dma_read(&s->dev, s->TxAddr[descriptor], txbuffer, txsize);
1832
1833 /* Mark descriptor as transferred */
1834 s->TxStatus[descriptor] |= TxHostOwns;
1835 s->TxStatus[descriptor] |= TxStatOK;
1836
1837 rtl8139_transfer_frame(s, txbuffer, txsize, 0, NULL);
1838
1839 DPRINTF("+++ transmitted %d bytes from descriptor %d\n", txsize,
1840 descriptor);
1841
1842 /* update interrupt */
1843 s->IntrStatus |= TxOK;
1844 rtl8139_update_irq(s);
1845
1846 return 1;
1847 }
1848
1849 /* structures and macros for task offloading */
1850 typedef struct ip_header
1851 {
1852 uint8_t ip_ver_len; /* version and header length */
1853 uint8_t ip_tos; /* type of service */
1854 uint16_t ip_len; /* total length */
1855 uint16_t ip_id; /* identification */
1856 uint16_t ip_off; /* fragment offset field */
1857 uint8_t ip_ttl; /* time to live */
1858 uint8_t ip_p; /* protocol */
1859 uint16_t ip_sum; /* checksum */
1860 uint32_t ip_src,ip_dst; /* source and dest address */
1861 } ip_header;
1862
1863 #define IP_HEADER_VERSION_4 4
1864 #define IP_HEADER_VERSION(ip) ((ip->ip_ver_len >> 4)&0xf)
1865 #define IP_HEADER_LENGTH(ip) (((ip->ip_ver_len)&0xf) << 2)
1866
1867 typedef struct tcp_header
1868 {
1869 uint16_t th_sport; /* source port */
1870 uint16_t th_dport; /* destination port */
1871 uint32_t th_seq; /* sequence number */
1872 uint32_t th_ack; /* acknowledgement number */
1873 uint16_t th_offset_flags; /* data offset, reserved 6 bits, TCP protocol flags */
1874 uint16_t th_win; /* window */
1875 uint16_t th_sum; /* checksum */
1876 uint16_t th_urp; /* urgent pointer */
1877 } tcp_header;
1878
1879 typedef struct udp_header
1880 {
1881 uint16_t uh_sport; /* source port */
1882 uint16_t uh_dport; /* destination port */
1883 uint16_t uh_ulen; /* udp length */
1884 uint16_t uh_sum; /* udp checksum */
1885 } udp_header;
1886
1887 typedef struct ip_pseudo_header
1888 {
1889 uint32_t ip_src;
1890 uint32_t ip_dst;
1891 uint8_t zeros;
1892 uint8_t ip_proto;
1893 uint16_t ip_payload;
1894 } ip_pseudo_header;
1895
1896 #define IP_PROTO_TCP 6
1897 #define IP_PROTO_UDP 17
1898
1899 #define TCP_HEADER_DATA_OFFSET(tcp) (((be16_to_cpu(tcp->th_offset_flags) >> 12)&0xf) << 2)
1900 #define TCP_FLAGS_ONLY(flags) ((flags)&0x3f)
1901 #define TCP_HEADER_FLAGS(tcp) TCP_FLAGS_ONLY(be16_to_cpu(tcp->th_offset_flags))
1902
1903 #define TCP_HEADER_CLEAR_FLAGS(tcp, off) ((tcp)->th_offset_flags &= cpu_to_be16(~TCP_FLAGS_ONLY(off)))
1904
1905 #define TCP_FLAG_FIN 0x01
1906 #define TCP_FLAG_PUSH 0x08
1907
1908 /* produces ones' complement sum of data */
1909 static uint16_t ones_complement_sum(uint8_t *data, size_t len)
1910 {
1911 uint32_t result = 0;
1912
1913 for (; len > 1; data+=2, len-=2)
1914 {
1915 result += *(uint16_t*)data;
1916 }
1917
1918 /* add the remainder byte */
1919 if (len)
1920 {
1921 uint8_t odd[2] = {*data, 0};
1922 result += *(uint16_t*)odd;
1923 }
1924
1925 while (result>>16)
1926 result = (result & 0xffff) + (result >> 16);
1927
1928 return result;
1929 }
1930
1931 static uint16_t ip_checksum(void *data, size_t len)
1932 {
1933 return ~ones_complement_sum((uint8_t*)data, len);
1934 }
1935
1936 static int rtl8139_cplus_transmit_one(RTL8139State *s)
1937 {
1938 if (!rtl8139_transmitter_enabled(s))
1939 {
1940 DPRINTF("+++ C+ mode: transmitter disabled\n");
1941 return 0;
1942 }
1943
1944 if (!rtl8139_cp_transmitter_enabled(s))
1945 {
1946 DPRINTF("+++ C+ mode: C+ transmitter disabled\n");
1947 return 0 ;
1948 }
1949
1950 int descriptor = s->currCPlusTxDesc;
1951
1952 dma_addr_t cplus_tx_ring_desc = rtl8139_addr64(s->TxAddr[0], s->TxAddr[1]);
1953
1954 /* Normal priority ring */
1955 cplus_tx_ring_desc += 16 * descriptor;
1956
1957 DPRINTF("+++ C+ mode reading TX descriptor %d from host memory at "
1958 "%08x %08x = 0x"DMA_ADDR_FMT"\n", descriptor, s->TxAddr[1],
1959 s->TxAddr[0], cplus_tx_ring_desc);
1960
1961 uint32_t val, txdw0,txdw1,txbufLO,txbufHI;
1962
1963 pci_dma_read(&s->dev, cplus_tx_ring_desc, (uint8_t *)&val, 4);
1964 txdw0 = le32_to_cpu(val);
1965 pci_dma_read(&s->dev, cplus_tx_ring_desc+4, (uint8_t *)&val, 4);
1966 txdw1 = le32_to_cpu(val);
1967 pci_dma_read(&s->dev, cplus_tx_ring_desc+8, (uint8_t *)&val, 4);
1968 txbufLO = le32_to_cpu(val);
1969 pci_dma_read(&s->dev, cplus_tx_ring_desc+12, (uint8_t *)&val, 4);
1970 txbufHI = le32_to_cpu(val);
1971
1972 DPRINTF("+++ C+ mode TX descriptor %d %08x %08x %08x %08x\n", descriptor,
1973 txdw0, txdw1, txbufLO, txbufHI);
1974
1975 /* w0 ownership flag */
1976 #define CP_TX_OWN (1<<31)
1977 /* w0 end of ring flag */
1978 #define CP_TX_EOR (1<<30)
1979 /* first segment of received packet flag */
1980 #define CP_TX_FS (1<<29)
1981 /* last segment of received packet flag */
1982 #define CP_TX_LS (1<<28)
1983 /* large send packet flag */
1984 #define CP_TX_LGSEN (1<<27)
1985 /* large send MSS mask, bits 16...25 */
1986 #define CP_TC_LGSEN_MSS_MASK ((1 << 12) - 1)
1987
1988 /* IP checksum offload flag */
1989 #define CP_TX_IPCS (1<<18)
1990 /* UDP checksum offload flag */
1991 #define CP_TX_UDPCS (1<<17)
1992 /* TCP checksum offload flag */
1993 #define CP_TX_TCPCS (1<<16)
1994
1995 /* w0 bits 0...15 : buffer size */
1996 #define CP_TX_BUFFER_SIZE (1<<16)
1997 #define CP_TX_BUFFER_SIZE_MASK (CP_TX_BUFFER_SIZE - 1)
1998 /* w1 add tag flag */
1999 #define CP_TX_TAGC (1<<17)
2000 /* w1 bits 0...15 : VLAN tag (big endian) */
2001 #define CP_TX_VLAN_TAG_MASK ((1<<16) - 1)
2002 /* w2 low 32bit of Rx buffer ptr */
2003 /* w3 high 32bit of Rx buffer ptr */
2004
2005 /* set after transmission */
2006 /* FIFO underrun flag */
2007 #define CP_TX_STATUS_UNF (1<<25)
2008 /* transmit error summary flag, valid if set any of three below */
2009 #define CP_TX_STATUS_TES (1<<23)
2010 /* out-of-window collision flag */
2011 #define CP_TX_STATUS_OWC (1<<22)
2012 /* link failure flag */
2013 #define CP_TX_STATUS_LNKF (1<<21)
2014 /* excessive collisions flag */
2015 #define CP_TX_STATUS_EXC (1<<20)
2016
2017 if (!(txdw0 & CP_TX_OWN))
2018 {
2019 DPRINTF("C+ Tx mode : descriptor %d is owned by host\n", descriptor);
2020 return 0 ;
2021 }
2022
2023 DPRINTF("+++ C+ Tx mode : transmitting from descriptor %d\n", descriptor);
2024
2025 if (txdw0 & CP_TX_FS)
2026 {
2027 DPRINTF("+++ C+ Tx mode : descriptor %d is first segment "
2028 "descriptor\n", descriptor);
2029
2030 /* reset internal buffer offset */
2031 s->cplus_txbuffer_offset = 0;
2032 }
2033
2034 int txsize = txdw0 & CP_TX_BUFFER_SIZE_MASK;
2035 dma_addr_t tx_addr = rtl8139_addr64(txbufLO, txbufHI);
2036
2037 /* make sure we have enough space to assemble the packet */
2038 if (!s->cplus_txbuffer)
2039 {
2040 s->cplus_txbuffer_len = CP_TX_BUFFER_SIZE;
2041 s->cplus_txbuffer = g_malloc(s->cplus_txbuffer_len);
2042 s->cplus_txbuffer_offset = 0;
2043
2044 DPRINTF("+++ C+ mode transmission buffer allocated space %d\n",
2045 s->cplus_txbuffer_len);
2046 }
2047
2048 if (s->cplus_txbuffer_offset + txsize >= s->cplus_txbuffer_len)
2049 {
2050 /* The spec didn't tell the maximum size, stick to CP_TX_BUFFER_SIZE */
2051 txsize = s->cplus_txbuffer_len - s->cplus_txbuffer_offset;
2052 DPRINTF("+++ C+ mode transmission buffer overrun, truncated descriptor"
2053 "length to %d\n", txsize);
2054 }
2055
2056 if (!s->cplus_txbuffer)
2057 {
2058 /* out of memory */
2059
2060 DPRINTF("+++ C+ mode transmiter failed to reallocate %d bytes\n",
2061 s->cplus_txbuffer_len);
2062
2063 /* update tally counter */
2064 ++s->tally_counters.TxERR;
2065 ++s->tally_counters.TxAbt;
2066
2067 return 0;
2068 }
2069
2070 /* append more data to the packet */
2071
2072 DPRINTF("+++ C+ mode transmit reading %d bytes from host memory at "
2073 DMA_ADDR_FMT" to offset %d\n", txsize, tx_addr,
2074 s->cplus_txbuffer_offset);
2075
2076 pci_dma_read(&s->dev, tx_addr,
2077 s->cplus_txbuffer + s->cplus_txbuffer_offset, txsize);
2078 s->cplus_txbuffer_offset += txsize;
2079
2080 /* seek to next Rx descriptor */
2081 if (txdw0 & CP_TX_EOR)
2082 {
2083 s->currCPlusTxDesc = 0;
2084 }
2085 else
2086 {
2087 ++s->currCPlusTxDesc;
2088 if (s->currCPlusTxDesc >= 64)
2089 s->currCPlusTxDesc = 0;
2090 }
2091
2092 /* transfer ownership to target */
2093 txdw0 &= ~CP_RX_OWN;
2094
2095 /* reset error indicator bits */
2096 txdw0 &= ~CP_TX_STATUS_UNF;
2097 txdw0 &= ~CP_TX_STATUS_TES;
2098 txdw0 &= ~CP_TX_STATUS_OWC;
2099 txdw0 &= ~CP_TX_STATUS_LNKF;
2100 txdw0 &= ~CP_TX_STATUS_EXC;
2101
2102 /* update ring data */
2103 val = cpu_to_le32(txdw0);
2104 pci_dma_write(&s->dev, cplus_tx_ring_desc, (uint8_t *)&val, 4);
2105
2106 /* Now decide if descriptor being processed is holding the last segment of packet */
2107 if (txdw0 & CP_TX_LS)
2108 {
2109 uint8_t dot1q_buffer_space[VLAN_HLEN];
2110 uint16_t *dot1q_buffer;
2111
2112 DPRINTF("+++ C+ Tx mode : descriptor %d is last segment descriptor\n",
2113 descriptor);
2114
2115 /* can transfer fully assembled packet */
2116
2117 uint8_t *saved_buffer = s->cplus_txbuffer;
2118 int saved_size = s->cplus_txbuffer_offset;
2119 int saved_buffer_len = s->cplus_txbuffer_len;
2120
2121 /* create vlan tag */
2122 if (txdw1 & CP_TX_TAGC) {
2123 /* the vlan tag is in BE byte order in the descriptor
2124 * BE + le_to_cpu() + ~swap()~ = cpu */
2125 DPRINTF("+++ C+ Tx mode : inserting vlan tag with ""tci: %u\n",
2126 bswap16(txdw1 & CP_TX_VLAN_TAG_MASK));
2127
2128 dot1q_buffer = (uint16_t *) dot1q_buffer_space;
2129 dot1q_buffer[0] = cpu_to_be16(ETH_P_8021Q);
2130 /* BE + le_to_cpu() + ~cpu_to_le()~ = BE */
2131 dot1q_buffer[1] = cpu_to_le16(txdw1 & CP_TX_VLAN_TAG_MASK);
2132 } else {
2133 dot1q_buffer = NULL;
2134 }
2135
2136 /* reset the card space to protect from recursive call */
2137 s->cplus_txbuffer = NULL;
2138 s->cplus_txbuffer_offset = 0;
2139 s->cplus_txbuffer_len = 0;
2140
2141 if (txdw0 & (CP_TX_IPCS | CP_TX_UDPCS | CP_TX_TCPCS | CP_TX_LGSEN))
2142 {
2143 DPRINTF("+++ C+ mode offloaded task checksum\n");
2144
2145 /* ip packet header */
2146 ip_header *ip = NULL;
2147 int hlen = 0;
2148 uint8_t ip_protocol = 0;
2149 uint16_t ip_data_len = 0;
2150
2151 uint8_t *eth_payload_data = NULL;
2152 size_t eth_payload_len = 0;
2153
2154 int proto = be16_to_cpu(*(uint16_t *)(saved_buffer + 12));
2155 if (proto == ETH_P_IP)
2156 {
2157 DPRINTF("+++ C+ mode has IP packet\n");
2158
2159 /* not aligned */
2160 eth_payload_data = saved_buffer + ETH_HLEN;
2161 eth_payload_len = saved_size - ETH_HLEN;
2162
2163 ip = (ip_header*)eth_payload_data;
2164
2165 if (IP_HEADER_VERSION(ip) != IP_HEADER_VERSION_4) {
2166 DPRINTF("+++ C+ mode packet has bad IP version %d "
2167 "expected %d\n", IP_HEADER_VERSION(ip),
2168 IP_HEADER_VERSION_4);
2169 ip = NULL;
2170 } else {
2171 hlen = IP_HEADER_LENGTH(ip);
2172 ip_protocol = ip->ip_p;
2173 ip_data_len = be16_to_cpu(ip->ip_len) - hlen;
2174 }
2175 }
2176
2177 if (ip)
2178 {
2179 if (txdw0 & CP_TX_IPCS)
2180 {
2181 DPRINTF("+++ C+ mode need IP checksum\n");
2182
2183 if (hlen<sizeof(ip_header) || hlen>eth_payload_len) {/* min header length */
2184 /* bad packet header len */
2185 /* or packet too short */
2186 }
2187 else
2188 {
2189 ip->ip_sum = 0;
2190 ip->ip_sum = ip_checksum(ip, hlen);
2191 DPRINTF("+++ C+ mode IP header len=%d checksum=%04x\n",
2192 hlen, ip->ip_sum);
2193 }
2194 }
2195
2196 if ((txdw0 & CP_TX_LGSEN) && ip_protocol == IP_PROTO_TCP)
2197 {
2198 int large_send_mss = (txdw0 >> 16) & CP_TC_LGSEN_MSS_MASK;
2199
2200 DPRINTF("+++ C+ mode offloaded task TSO MTU=%d IP data %d "
2201 "frame data %d specified MSS=%d\n", ETH_MTU,
2202 ip_data_len, saved_size - ETH_HLEN, large_send_mss);
2203
2204 int tcp_send_offset = 0;
2205 int send_count = 0;
2206
2207 /* maximum IP header length is 60 bytes */
2208 uint8_t saved_ip_header[60];
2209
2210 /* save IP header template; data area is used in tcp checksum calculation */
2211 memcpy(saved_ip_header, eth_payload_data, hlen);
2212
2213 /* a placeholder for checksum calculation routine in tcp case */
2214 uint8_t *data_to_checksum = eth_payload_data + hlen - 12;
2215 // size_t data_to_checksum_len = eth_payload_len - hlen + 12;
2216
2217 /* pointer to TCP header */
2218 tcp_header *p_tcp_hdr = (tcp_header*)(eth_payload_data + hlen);
2219
2220 int tcp_hlen = TCP_HEADER_DATA_OFFSET(p_tcp_hdr);
2221
2222 /* ETH_MTU = ip header len + tcp header len + payload */
2223 int tcp_data_len = ip_data_len - tcp_hlen;
2224 int tcp_chunk_size = ETH_MTU - hlen - tcp_hlen;
2225
2226 DPRINTF("+++ C+ mode TSO IP data len %d TCP hlen %d TCP "
2227 "data len %d TCP chunk size %d\n", ip_data_len,
2228 tcp_hlen, tcp_data_len, tcp_chunk_size);
2229
2230 /* note the cycle below overwrites IP header data,
2231 but restores it from saved_ip_header before sending packet */
2232
2233 int is_last_frame = 0;
2234
2235 for (tcp_send_offset = 0; tcp_send_offset < tcp_data_len; tcp_send_offset += tcp_chunk_size)
2236 {
2237 uint16_t chunk_size = tcp_chunk_size;
2238
2239 /* check if this is the last frame */
2240 if (tcp_send_offset + tcp_chunk_size >= tcp_data_len)
2241 {
2242 is_last_frame = 1;
2243 chunk_size = tcp_data_len - tcp_send_offset;
2244 }
2245
2246 DPRINTF("+++ C+ mode TSO TCP seqno %08x\n",
2247 be32_to_cpu(p_tcp_hdr->th_seq));
2248
2249 /* add 4 TCP pseudoheader fields */
2250 /* copy IP source and destination fields */
2251 memcpy(data_to_checksum, saved_ip_header + 12, 8);
2252
2253 DPRINTF("+++ C+ mode TSO calculating TCP checksum for "
2254 "packet with %d bytes data\n", tcp_hlen +
2255 chunk_size);
2256
2257 if (tcp_send_offset)
2258 {
2259 memcpy((uint8_t*)p_tcp_hdr + tcp_hlen, (uint8_t*)p_tcp_hdr + tcp_hlen + tcp_send_offset, chunk_size);
2260 }
2261
2262 /* keep PUSH and FIN flags only for the last frame */
2263 if (!is_last_frame)
2264 {
2265 TCP_HEADER_CLEAR_FLAGS(p_tcp_hdr, TCP_FLAG_PUSH|TCP_FLAG_FIN);
2266 }
2267
2268 /* recalculate TCP checksum */
2269 ip_pseudo_header *p_tcpip_hdr = (ip_pseudo_header *)data_to_checksum;
2270 p_tcpip_hdr->zeros = 0;
2271 p_tcpip_hdr->ip_proto = IP_PROTO_TCP;
2272 p_tcpip_hdr->ip_payload = cpu_to_be16(tcp_hlen + chunk_size);
2273
2274 p_tcp_hdr->th_sum = 0;
2275
2276 int tcp_checksum = ip_checksum(data_to_checksum, tcp_hlen + chunk_size + 12);
2277 DPRINTF("+++ C+ mode TSO TCP checksum %04x\n",
2278 tcp_checksum);
2279
2280 p_tcp_hdr->th_sum = tcp_checksum;
2281
2282 /* restore IP header */
2283 memcpy(eth_payload_data, saved_ip_header, hlen);
2284
2285 /* set IP data length and recalculate IP checksum */
2286 ip->ip_len = cpu_to_be16(hlen + tcp_hlen + chunk_size);
2287
2288 /* increment IP id for subsequent frames */
2289 ip->ip_id = cpu_to_be16(tcp_send_offset/tcp_chunk_size + be16_to_cpu(ip->ip_id));
2290
2291 ip->ip_sum = 0;
2292 ip->ip_sum = ip_checksum(eth_payload_data, hlen);
2293 DPRINTF("+++ C+ mode TSO IP header len=%d "
2294 "checksum=%04x\n", hlen, ip->ip_sum);
2295
2296 int tso_send_size = ETH_HLEN + hlen + tcp_hlen + chunk_size;
2297 DPRINTF("+++ C+ mode TSO transferring packet size "
2298 "%d\n", tso_send_size);
2299 rtl8139_transfer_frame(s, saved_buffer, tso_send_size,
2300 0, (uint8_t *) dot1q_buffer);
2301
2302 /* add transferred count to TCP sequence number */
2303 p_tcp_hdr->th_seq = cpu_to_be32(chunk_size + be32_to_cpu(p_tcp_hdr->th_seq));
2304 ++send_count;
2305 }
2306
2307 /* Stop sending this frame */
2308 saved_size = 0;
2309 }
2310 else if (txdw0 & (CP_TX_TCPCS|CP_TX_UDPCS))
2311 {
2312 DPRINTF("+++ C+ mode need TCP or UDP checksum\n");
2313
2314 /* maximum IP header length is 60 bytes */
2315 uint8_t saved_ip_header[60];
2316 memcpy(saved_ip_header, eth_payload_data, hlen);
2317
2318 uint8_t *data_to_checksum = eth_payload_data + hlen - 12;
2319 // size_t data_to_checksum_len = eth_payload_len - hlen + 12;
2320
2321 /* add 4 TCP pseudoheader fields */
2322 /* copy IP source and destination fields */
2323 memcpy(data_to_checksum, saved_ip_header + 12, 8);
2324
2325 if ((txdw0 & CP_TX_TCPCS) && ip_protocol == IP_PROTO_TCP)
2326 {
2327 DPRINTF("+++ C+ mode calculating TCP checksum for "
2328 "packet with %d bytes data\n", ip_data_len);
2329
2330 ip_pseudo_header *p_tcpip_hdr = (ip_pseudo_header *)data_to_checksum;
2331 p_tcpip_hdr->zeros = 0;
2332 p_tcpip_hdr->ip_proto = IP_PROTO_TCP;
2333 p_tcpip_hdr->ip_payload = cpu_to_be16(ip_data_len);
2334
2335 tcp_header* p_tcp_hdr = (tcp_header *) (data_to_checksum+12);
2336
2337 p_tcp_hdr->th_sum = 0;
2338
2339 int tcp_checksum = ip_checksum(data_to_checksum, ip_data_len + 12);
2340 DPRINTF("+++ C+ mode TCP checksum %04x\n",
2341 tcp_checksum);
2342
2343 p_tcp_hdr->th_sum = tcp_checksum;
2344 }
2345 else if ((txdw0 & CP_TX_UDPCS) && ip_protocol == IP_PROTO_UDP)
2346 {
2347 DPRINTF("+++ C+ mode calculating UDP checksum for "
2348 "packet with %d bytes data\n", ip_data_len);
2349
2350 ip_pseudo_header *p_udpip_hdr = (ip_pseudo_header *)data_to_checksum;
2351 p_udpip_hdr->zeros = 0;
2352 p_udpip_hdr->ip_proto = IP_PROTO_UDP;
2353 p_udpip_hdr->ip_payload = cpu_to_be16(ip_data_len);
2354
2355 udp_header *p_udp_hdr = (udp_header *) (data_to_checksum+12);
2356
2357 p_udp_hdr->uh_sum = 0;
2358
2359 int udp_checksum = ip_checksum(data_to_checksum, ip_data_len + 12);
2360 DPRINTF("+++ C+ mode UDP checksum %04x\n",
2361 udp_checksum);
2362
2363 p_udp_hdr->uh_sum = udp_checksum;
2364 }
2365
2366 /* restore IP header */
2367 memcpy(eth_payload_data, saved_ip_header, hlen);
2368 }
2369 }
2370 }
2371
2372 /* update tally counter */
2373 ++s->tally_counters.TxOk;
2374
2375 DPRINTF("+++ C+ mode transmitting %d bytes packet\n", saved_size);
2376
2377 rtl8139_transfer_frame(s, saved_buffer, saved_size, 1,
2378 (uint8_t *) dot1q_buffer);
2379
2380 /* restore card space if there was no recursion and reset offset */
2381 if (!s->cplus_txbuffer)
2382 {
2383 s->cplus_txbuffer = saved_buffer;
2384 s->cplus_txbuffer_len = saved_buffer_len;
2385 s->cplus_txbuffer_offset = 0;
2386 }
2387 else
2388 {
2389 g_free(saved_buffer);
2390 }
2391 }
2392 else
2393 {
2394 DPRINTF("+++ C+ mode transmission continue to next descriptor\n");
2395 }
2396
2397 return 1;
2398 }
2399
2400 static void rtl8139_cplus_transmit(RTL8139State *s)
2401 {
2402 int txcount = 0;
2403
2404 while (rtl8139_cplus_transmit_one(s))
2405 {
2406 ++txcount;
2407 }
2408
2409 /* Mark transfer completed */
2410 if (!txcount)
2411 {
2412 DPRINTF("C+ mode : transmitter queue stalled, current TxDesc = %d\n",
2413 s->currCPlusTxDesc);
2414 }
2415 else
2416 {
2417 /* update interrupt status */
2418 s->IntrStatus |= TxOK;
2419 rtl8139_update_irq(s);
2420 }
2421 }
2422
2423 static void rtl8139_transmit(RTL8139State *s)
2424 {
2425 int descriptor = s->currTxDesc, txcount = 0;
2426
2427 /*while*/
2428 if (rtl8139_transmit_one(s, descriptor))
2429 {
2430 ++s->currTxDesc;
2431 s->currTxDesc %= 4;
2432 ++txcount;
2433 }
2434
2435 /* Mark transfer completed */
2436 if (!txcount)
2437 {
2438 DPRINTF("transmitter queue stalled, current TxDesc = %d\n",
2439 s->currTxDesc);
2440 }
2441 }
2442
2443 static void rtl8139_TxStatus_write(RTL8139State *s, uint32_t txRegOffset, uint32_t val)
2444 {
2445
2446 int descriptor = txRegOffset/4;
2447
2448 /* handle C+ transmit mode register configuration */
2449
2450 if (s->cplus_enabled)
2451 {
2452 DPRINTF("RTL8139C+ DTCCR write offset=0x%x val=0x%08x "
2453 "descriptor=%d\n", txRegOffset, val, descriptor);
2454
2455 /* handle Dump Tally Counters command */
2456 s->TxStatus[descriptor] = val;
2457
2458 if (descriptor == 0 && (val & 0x8))
2459 {
2460 target_phys_addr_t tc_addr = rtl8139_addr64(s->TxStatus[0] & ~0x3f, s->TxStatus[1]);
2461
2462 /* dump tally counters to specified memory location */
2463 RTL8139TallyCounters_dma_write(s, tc_addr);
2464
2465 /* mark dump completed */
2466 s->TxStatus[0] &= ~0x8;
2467 }
2468
2469 return;
2470 }
2471
2472 DPRINTF("TxStatus write offset=0x%x val=0x%08x descriptor=%d\n",
2473 txRegOffset, val, descriptor);
2474
2475 /* mask only reserved bits */
2476 val &= ~0xff00c000; /* these bits are reset on write */
2477 val = SET_MASKED(val, 0x00c00000, s->TxStatus[descriptor]);
2478
2479 s->TxStatus[descriptor] = val;
2480
2481 /* attempt to start transmission */
2482 rtl8139_transmit(s);
2483 }
2484
2485 static uint32_t rtl8139_TxStatus_read(RTL8139State *s, uint8_t addr, int size)
2486 {
2487 uint32_t reg = (addr - TxStatus0) / 4;
2488 uint32_t offset = addr & 0x3;
2489 uint32_t ret = 0;
2490
2491 if (addr & (size - 1)) {
2492 DPRINTF("not implemented read for TxStatus addr=0x%x size=0x%x\n", addr,
2493 size);
2494 return ret;
2495 }
2496
2497 switch (size) {
2498 case 1: /* fall through */
2499 case 2: /* fall through */
2500 case 4:
2501 ret = (s->TxStatus[reg] >> offset * 8) & ((1 << (size * 8)) - 1);
2502 DPRINTF("TxStatus[%d] read addr=0x%x size=0x%x val=0x%08x\n", reg, addr,
2503 size, ret);
2504 break;
2505 default:
2506 DPRINTF("unsupported size 0x%x of TxStatus reading\n", size);
2507 break;
2508 }
2509
2510 return ret;
2511 }
2512
2513 static uint16_t rtl8139_TSAD_read(RTL8139State *s)
2514 {
2515 uint16_t ret = 0;
2516
2517 /* Simulate TSAD, it is read only anyway */
2518
2519 ret = ((s->TxStatus[3] & TxStatOK )?TSAD_TOK3:0)
2520 |((s->TxStatus[2] & TxStatOK )?TSAD_TOK2:0)
2521 |((s->TxStatus[1] & TxStatOK )?TSAD_TOK1:0)
2522 |((s->TxStatus[0] & TxStatOK )?TSAD_TOK0:0)
2523
2524 |((s->TxStatus[3] & TxUnderrun)?TSAD_TUN3:0)
2525 |((s->TxStatus[2] & TxUnderrun)?TSAD_TUN2:0)
2526 |((s->TxStatus[1] & TxUnderrun)?TSAD_TUN1:0)
2527 |((s->TxStatus[0] & TxUnderrun)?TSAD_TUN0:0)
2528
2529 |((s->TxStatus[3] & TxAborted )?TSAD_TABT3:0)
2530 |((s->TxStatus[2] & TxAborted )?TSAD_TABT2:0)
2531 |((s->TxStatus[1] & TxAborted )?TSAD_TABT1:0)
2532 |((s->TxStatus[0] & TxAborted )?TSAD_TABT0:0)
2533
2534 |((s->TxStatus[3] & TxHostOwns )?TSAD_OWN3:0)
2535 |((s->TxStatus[2] & TxHostOwns )?TSAD_OWN2:0)
2536 |((s->TxStatus[1] & TxHostOwns )?TSAD_OWN1:0)
2537 |((s->TxStatus[0] & TxHostOwns )?TSAD_OWN0:0) ;
2538
2539
2540 DPRINTF("TSAD read val=0x%04x\n", ret);
2541
2542 return ret;
2543 }
2544
2545 static uint16_t rtl8139_CSCR_read(RTL8139State *s)
2546 {
2547 uint16_t ret = s->CSCR;
2548
2549 DPRINTF("CSCR read val=0x%04x\n", ret);
2550
2551 return ret;
2552 }
2553
2554 static void rtl8139_TxAddr_write(RTL8139State *s, uint32_t txAddrOffset, uint32_t val)
2555 {
2556 DPRINTF("TxAddr write offset=0x%x val=0x%08x\n", txAddrOffset, val);
2557
2558 s->TxAddr[txAddrOffset/4] = val;
2559 }
2560
2561 static uint32_t rtl8139_TxAddr_read(RTL8139State *s, uint32_t txAddrOffset)
2562 {
2563 uint32_t ret = s->TxAddr[txAddrOffset/4];
2564
2565 DPRINTF("TxAddr read offset=0x%x val=0x%08x\n", txAddrOffset, ret);
2566
2567 return ret;
2568 }
2569
2570 static void rtl8139_RxBufPtr_write(RTL8139State *s, uint32_t val)
2571 {
2572 DPRINTF("RxBufPtr write val=0x%04x\n", val);
2573
2574 /* this value is off by 16 */
2575 s->RxBufPtr = MOD2(val + 0x10, s->RxBufferSize);
2576
2577 DPRINTF(" CAPR write: rx buffer length %d head 0x%04x read 0x%04x\n",
2578 s->RxBufferSize, s->RxBufAddr, s->RxBufPtr);
2579 }
2580
2581 static uint32_t rtl8139_RxBufPtr_read(RTL8139State *s)
2582 {
2583 /* this value is off by 16 */
2584 uint32_t ret = s->RxBufPtr - 0x10;
2585
2586 DPRINTF("RxBufPtr read val=0x%04x\n", ret);
2587
2588 return ret;
2589 }
2590
2591 static uint32_t rtl8139_RxBufAddr_read(RTL8139State *s)
2592 {
2593 /* this value is NOT off by 16 */
2594 uint32_t ret = s->RxBufAddr;
2595
2596 DPRINTF("RxBufAddr read val=0x%04x\n", ret);
2597
2598 return ret;
2599 }
2600
2601 static void rtl8139_RxBuf_write(RTL8139State *s, uint32_t val)
2602 {
2603 DPRINTF("RxBuf write val=0x%08x\n", val);
2604
2605 s->RxBuf = val;
2606
2607 /* may need to reset rxring here */
2608 }
2609
2610 static uint32_t rtl8139_RxBuf_read(RTL8139State *s)
2611 {
2612 uint32_t ret = s->RxBuf;
2613
2614 DPRINTF("RxBuf read val=0x%08x\n", ret);
2615
2616 return ret;
2617 }
2618
2619 static void rtl8139_IntrMask_write(RTL8139State *s, uint32_t val)
2620 {
2621 DPRINTF("IntrMask write(w) val=0x%04x\n", val);
2622
2623 /* mask unwritable bits */
2624 val = SET_MASKED(val, 0x1e00, s->IntrMask);
2625
2626 s->IntrMask = val;
2627
2628 rtl8139_set_next_tctr_time(s, qemu_get_clock_ns(vm_clock));
2629 rtl8139_update_irq(s);
2630
2631 }
2632
2633 static uint32_t rtl8139_IntrMask_read(RTL8139State *s)
2634 {
2635 uint32_t ret = s->IntrMask;
2636
2637 DPRINTF("IntrMask read(w) val=0x%04x\n", ret);
2638
2639 return ret;
2640 }
2641
2642 static void rtl8139_IntrStatus_write(RTL8139State *s, uint32_t val)
2643 {
2644 DPRINTF("IntrStatus write(w) val=0x%04x\n", val);
2645
2646 #if 0
2647
2648 /* writing to ISR has no effect */
2649
2650 return;
2651
2652 #else
2653 uint16_t newStatus = s->IntrStatus & ~val;
2654
2655 /* mask unwritable bits */
2656 newStatus = SET_MASKED(newStatus, 0x1e00, s->IntrStatus);
2657
2658 /* writing 1 to interrupt status register bit clears it */
2659 s->IntrStatus = 0;
2660 rtl8139_update_irq(s);
2661
2662 s->IntrStatus = newStatus;
2663 /*
2664 * Computing if we miss an interrupt here is not that correct but
2665 * considered that we should have had already an interrupt
2666 * and probably emulated is slower is better to assume this resetting was
2667 * done before testing on previous rtl8139_update_irq lead to IRQ losing
2668 */
2669 rtl8139_set_next_tctr_time(s, qemu_get_clock_ns(vm_clock));
2670 rtl8139_update_irq(s);
2671
2672 #endif
2673 }
2674
2675 static uint32_t rtl8139_IntrStatus_read(RTL8139State *s)
2676 {
2677 rtl8139_set_next_tctr_time(s, qemu_get_clock_ns(vm_clock));
2678
2679 uint32_t ret = s->IntrStatus;
2680
2681 DPRINTF("IntrStatus read(w) val=0x%04x\n", ret);
2682
2683 #if 0
2684
2685 /* reading ISR clears all interrupts */
2686 s->IntrStatus = 0;
2687
2688 rtl8139_update_irq(s);
2689
2690 #endif
2691
2692 return ret;
2693 }
2694
2695 static void rtl8139_MultiIntr_write(RTL8139State *s, uint32_t val)
2696 {
2697 DPRINTF("MultiIntr write(w) val=0x%04x\n", val);
2698
2699 /* mask unwritable bits */
2700 val = SET_MASKED(val, 0xf000, s->MultiIntr);
2701
2702 s->MultiIntr = val;
2703 }
2704
2705 static uint32_t rtl8139_MultiIntr_read(RTL8139State *s)
2706 {
2707 uint32_t ret = s->MultiIntr;
2708
2709 DPRINTF("MultiIntr read(w) val=0x%04x\n", ret);
2710
2711 return ret;
2712 }
2713
2714 static void rtl8139_io_writeb(void *opaque, uint8_t addr, uint32_t val)
2715 {
2716 RTL8139State *s = opaque;
2717
2718 switch (addr)
2719 {
2720 case MAC0 ... MAC0+5:
2721 s->phys[addr - MAC0] = val;
2722 break;
2723 case MAC0+6 ... MAC0+7:
2724 /* reserved */
2725 break;
2726 case MAR0 ... MAR0+7:
2727 s->mult[addr - MAR0] = val;
2728 break;
2729 case ChipCmd:
2730 rtl8139_ChipCmd_write(s, val);
2731 break;
2732 case Cfg9346:
2733 rtl8139_Cfg9346_write(s, val);
2734 break;
2735 case TxConfig: /* windows driver sometimes writes using byte-lenth call */
2736 rtl8139_TxConfig_writeb(s, val);
2737 break;
2738 case Config0:
2739 rtl8139_Config0_write(s, val);
2740 break;
2741 case Config1:
2742 rtl8139_Config1_write(s, val);
2743 break;
2744 case Config3:
2745 rtl8139_Config3_write(s, val);
2746 break;
2747 case Config4:
2748 rtl8139_Config4_write(s, val);
2749 break;
2750 case Config5:
2751 rtl8139_Config5_write(s, val);
2752 break;
2753 case MediaStatus:
2754 /* ignore */
2755 DPRINTF("not implemented write(b) to MediaStatus val=0x%02x\n",
2756 val);
2757 break;
2758
2759 case HltClk:
2760 DPRINTF("HltClk write val=0x%08x\n", val);
2761 if (val == 'R')
2762 {
2763 s->clock_enabled = 1;
2764 }
2765 else if (val == 'H')
2766 {
2767 s->clock_enabled = 0;
2768 }
2769 break;
2770
2771 case TxThresh:
2772 DPRINTF("C+ TxThresh write(b) val=0x%02x\n", val);
2773 s->TxThresh = val;
2774 break;
2775
2776 case TxPoll:
2777 DPRINTF("C+ TxPoll write(b) val=0x%02x\n", val);
2778 if (val & (1 << 7))
2779 {
2780 DPRINTF("C+ TxPoll high priority transmission (not "
2781 "implemented)\n");
2782 //rtl8139_cplus_transmit(s);
2783 }
2784 if (val & (1 << 6))
2785 {
2786 DPRINTF("C+ TxPoll normal priority transmission\n");
2787 rtl8139_cplus_transmit(s);
2788 }
2789
2790 break;
2791
2792 default:
2793 DPRINTF("not implemented write(b) addr=0x%x val=0x%02x\n", addr,
2794 val);
2795 break;
2796 }
2797 }
2798
2799 static void rtl8139_io_writew(void *opaque, uint8_t addr, uint32_t val)
2800 {
2801 RTL8139State *s = opaque;
2802
2803 switch (addr)
2804 {
2805 case IntrMask:
2806 rtl8139_IntrMask_write(s, val);
2807 break;
2808
2809 case IntrStatus:
2810 rtl8139_IntrStatus_write(s, val);
2811 break;
2812
2813 case MultiIntr:
2814 rtl8139_MultiIntr_write(s, val);
2815 break;
2816
2817 case RxBufPtr:
2818 rtl8139_RxBufPtr_write(s, val);
2819 break;
2820
2821 case BasicModeCtrl:
2822 rtl8139_BasicModeCtrl_write(s, val);
2823 break;
2824 case BasicModeStatus:
2825 rtl8139_BasicModeStatus_write(s, val);
2826 break;
2827 case NWayAdvert:
2828 DPRINTF("NWayAdvert write(w) val=0x%04x\n", val);
2829 s->NWayAdvert = val;
2830 break;
2831 case NWayLPAR:
2832 DPRINTF("forbidden NWayLPAR write(w) val=0x%04x\n", val);
2833 break;
2834 case NWayExpansion:
2835 DPRINTF("NWayExpansion write(w) val=0x%04x\n", val);
2836 s->NWayExpansion = val;
2837 break;
2838
2839 case CpCmd:
2840 rtl8139_CpCmd_write(s, val);
2841 break;
2842
2843 case IntrMitigate:
2844 rtl8139_IntrMitigate_write(s, val);
2845 break;
2846
2847 default:
2848 DPRINTF("ioport write(w) addr=0x%x val=0x%04x via write(b)\n",
2849 addr, val);
2850
2851 rtl8139_io_writeb(opaque, addr, val & 0xff);
2852 rtl8139_io_writeb(opaque, addr + 1, (val >> 8) & 0xff);
2853 break;
2854 }
2855 }
2856
2857 static void rtl8139_set_next_tctr_time(RTL8139State *s, int64_t current_time)
2858 {
2859 int64_t pci_time, next_time;
2860 uint32_t low_pci;
2861
2862 DPRINTF("entered rtl8139_set_next_tctr_time\n");
2863
2864 if (s->TimerExpire && current_time >= s->TimerExpire) {
2865 s->IntrStatus |= PCSTimeout;
2866 rtl8139_update_irq(s);
2867 }
2868
2869 /* Set QEMU timer only if needed that is
2870 * - TimerInt <> 0 (we have a timer)
2871 * - mask = 1 (we want an interrupt timer)
2872 * - irq = 0 (irq is not already active)
2873 * If any of above change we need to compute timer again
2874 * Also we must check if timer is passed without QEMU timer
2875 */
2876 s->TimerExpire = 0;
2877 if (!s->TimerInt) {
2878 return;
2879 }
2880
2881 pci_time = muldiv64(current_time - s->TCTR_base, PCI_FREQUENCY,
2882 get_ticks_per_sec());
2883 low_pci = pci_time & 0xffffffff;
2884 pci_time = pci_time - low_pci + s->TimerInt;
2885 if (low_pci >= s->TimerInt) {
2886 pci_time += 0x100000000LL;
2887 }
2888 next_time = s->TCTR_base + muldiv64(pci_time, get_ticks_per_sec(),
2889 PCI_FREQUENCY);
2890 s->TimerExpire = next_time;
2891
2892 if ((s->IntrMask & PCSTimeout) != 0 && (s->IntrStatus & PCSTimeout) == 0) {
2893 qemu_mod_timer(s->timer, next_time);
2894 }
2895 }
2896
2897 static void rtl8139_io_writel(void *opaque, uint8_t addr, uint32_t val)
2898 {
2899 RTL8139State *s = opaque;
2900
2901 switch (addr)
2902 {
2903 case RxMissed:
2904 DPRINTF("RxMissed clearing on write\n");
2905 s->RxMissed = 0;
2906 break;
2907
2908 case TxConfig:
2909 rtl8139_TxConfig_write(s, val);
2910 break;
2911
2912 case RxConfig:
2913 rtl8139_RxConfig_write(s, val);
2914 break;
2915
2916 case TxStatus0 ... TxStatus0+4*4-1:
2917 rtl8139_TxStatus_write(s, addr-TxStatus0, val);
2918 break;
2919
2920 case TxAddr0 ... TxAddr0+4*4-1:
2921 rtl8139_TxAddr_write(s, addr-TxAddr0, val);
2922 break;
2923
2924 case RxBuf:
2925 rtl8139_RxBuf_write(s, val);
2926 break;
2927
2928 case RxRingAddrLO:
2929 DPRINTF("C+ RxRing low bits write val=0x%08x\n", val);
2930 s->RxRingAddrLO = val;
2931 break;
2932
2933 case RxRingAddrHI:
2934 DPRINTF("C+ RxRing high bits write val=0x%08x\n", val);
2935 s->RxRingAddrHI = val;
2936 break;
2937
2938 case Timer:
2939 DPRINTF("TCTR Timer reset on write\n");
2940 s->TCTR_base = qemu_get_clock_ns(vm_clock);
2941 rtl8139_set_next_tctr_time(s, s->TCTR_base);
2942 break;
2943
2944 case FlashReg:
2945 DPRINTF("FlashReg TimerInt write val=0x%08x\n", val);
2946 if (s->TimerInt != val) {
2947 s->TimerInt = val;
2948 rtl8139_set_next_tctr_time(s, qemu_get_clock_ns(vm_clock));
2949 }
2950 break;
2951
2952 default:
2953 DPRINTF("ioport write(l) addr=0x%x val=0x%08x via write(b)\n",
2954 addr, val);
2955 rtl8139_io_writeb(opaque, addr, val & 0xff);
2956 rtl8139_io_writeb(opaque, addr + 1, (val >> 8) & 0xff);
2957 rtl8139_io_writeb(opaque, addr + 2, (val >> 16) & 0xff);
2958 rtl8139_io_writeb(opaque, addr + 3, (val >> 24) & 0xff);
2959 break;
2960 }
2961 }
2962
2963 static uint32_t rtl8139_io_readb(void *opaque, uint8_t addr)
2964 {
2965 RTL8139State *s = opaque;
2966 int ret;
2967
2968 switch (addr)
2969 {
2970 case MAC0 ... MAC0+5:
2971 ret = s->phys[addr - MAC0];
2972 break;
2973 case MAC0+6 ... MAC0+7:
2974 ret = 0;
2975 break;
2976 case MAR0 ... MAR0+7:
2977 ret = s->mult[addr - MAR0];
2978 break;
2979 case TxStatus0 ... TxStatus0+4*4-1:
2980 ret = rtl8139_TxStatus_read(s, addr, 1);
2981 break;
2982 case ChipCmd:
2983 ret = rtl8139_ChipCmd_read(s);
2984 break;
2985 case Cfg9346:
2986 ret = rtl8139_Cfg9346_read(s);
2987 break;
2988 case Config0:
2989 ret = rtl8139_Config0_read(s);
2990 break;
2991 case Config1:
2992 ret = rtl8139_Config1_read(s);
2993 break;
2994 case Config3:
2995 ret = rtl8139_Config3_read(s);
2996 break;
2997 case Config4:
2998 ret = rtl8139_Config4_read(s);
2999 break;
3000 case Config5:
3001 ret = rtl8139_Config5_read(s);
3002 break;
3003
3004 case MediaStatus:
3005 ret = 0xd0;
3006 DPRINTF("MediaStatus read 0x%x\n", ret);
3007 break;
3008
3009 case HltClk:
3010 ret = s->clock_enabled;
3011 DPRINTF("HltClk read 0x%x\n", ret);
3012 break;
3013
3014 case PCIRevisionID:
3015 ret = RTL8139_PCI_REVID;
3016 DPRINTF("PCI Revision ID read 0x%x\n", ret);
3017 break;
3018
3019 case TxThresh:
3020 ret = s->TxThresh;
3021 DPRINTF("C+ TxThresh read(b) val=0x%02x\n", ret);
3022 break;
3023
3024 case 0x43: /* Part of TxConfig register. Windows driver tries to read it */
3025 ret = s->TxConfig >> 24;
3026 DPRINTF("RTL8139C TxConfig at 0x43 read(b) val=0x%02x\n", ret);
3027 break;
3028
3029 default:
3030 DPRINTF("not implemented read(b) addr=0x%x\n", addr);
3031 ret = 0;
3032 break;
3033 }
3034
3035 return ret;
3036 }
3037
3038 static uint32_t rtl8139_io_readw(void *opaque, uint8_t addr)
3039 {
3040 RTL8139State *s = opaque;
3041 uint32_t ret;
3042
3043 switch (addr)
3044 {
3045 case TxAddr0 ... TxAddr0+4*4-1:
3046 ret = rtl8139_TxStatus_read(s, addr, 2);
3047 break;
3048 case IntrMask:
3049 ret = rtl8139_IntrMask_read(s);
3050 break;
3051
3052 case IntrStatus:
3053 ret = rtl8139_IntrStatus_read(s);
3054 break;
3055
3056 case MultiIntr:
3057 ret = rtl8139_MultiIntr_read(s);
3058 break;
3059
3060 case RxBufPtr:
3061 ret = rtl8139_RxBufPtr_read(s);
3062 break;
3063
3064 case RxBufAddr:
3065 ret = rtl8139_RxBufAddr_read(s);
3066 break;
3067
3068 case BasicModeCtrl:
3069 ret = rtl8139_BasicModeCtrl_read(s);
3070 break;
3071 case BasicModeStatus:
3072 ret = rtl8139_BasicModeStatus_read(s);
3073 break;
3074 case NWayAdvert:
3075 ret = s->NWayAdvert;
3076 DPRINTF("NWayAdvert read(w) val=0x%04x\n", ret);
3077 break;
3078 case NWayLPAR:
3079 ret = s->NWayLPAR;
3080 DPRINTF("NWayLPAR read(w) val=0x%04x\n", ret);
3081 break;
3082 case NWayExpansion:
3083 ret = s->NWayExpansion;
3084 DPRINTF("NWayExpansion read(w) val=0x%04x\n", ret);
3085 break;
3086
3087 case CpCmd:
3088 ret = rtl8139_CpCmd_read(s);
3089 break;
3090
3091 case IntrMitigate:
3092 ret = rtl8139_IntrMitigate_read(s);
3093 break;
3094
3095 case TxSummary:
3096 ret = rtl8139_TSAD_read(s);
3097 break;
3098
3099 case CSCR:
3100 ret = rtl8139_CSCR_read(s);
3101 break;
3102
3103 default:
3104 DPRINTF("ioport read(w) addr=0x%x via read(b)\n", addr);
3105
3106 ret = rtl8139_io_readb(opaque, addr);
3107 ret |= rtl8139_io_readb(opaque, addr + 1) << 8;
3108
3109 DPRINTF("ioport read(w) addr=0x%x val=0x%04x\n", addr, ret);
3110 break;
3111 }
3112
3113 return ret;
3114 }
3115
3116 static uint32_t rtl8139_io_readl(void *opaque, uint8_t addr)
3117 {
3118 RTL8139State *s = opaque;
3119 uint32_t ret;
3120
3121 switch (addr)
3122 {
3123 case RxMissed:
3124 ret = s->RxMissed;
3125
3126 DPRINTF("RxMissed read val=0x%08x\n", ret);
3127 break;
3128
3129 case TxConfig:
3130 ret = rtl8139_TxConfig_read(s);
3131 break;
3132
3133 case RxConfig:
3134 ret = rtl8139_RxConfig_read(s);
3135 break;
3136
3137 case TxStatus0 ... TxStatus0+4*4-1:
3138 ret = rtl8139_TxStatus_read(s, addr, 4);
3139 break;
3140
3141 case TxAddr0 ... TxAddr0+4*4-1:
3142 ret = rtl8139_TxAddr_read(s, addr-TxAddr0);
3143 break;
3144
3145 case RxBuf:
3146 ret = rtl8139_RxBuf_read(s);
3147 break;
3148
3149 case RxRingAddrLO:
3150 ret = s->RxRingAddrLO;
3151 DPRINTF("C+ RxRing low bits read val=0x%08x\n", ret);
3152 break;
3153
3154 case RxRingAddrHI:
3155 ret = s->RxRingAddrHI;
3156 DPRINTF("C+ RxRing high bits read val=0x%08x\n", ret);
3157 break;
3158
3159 case Timer:
3160 ret = muldiv64(qemu_get_clock_ns(vm_clock) - s->TCTR_base,
3161 PCI_FREQUENCY, get_ticks_per_sec());
3162 DPRINTF("TCTR Timer read val=0x%08x\n", ret);
3163 break;
3164
3165 case FlashReg:
3166 ret = s->TimerInt;
3167 DPRINTF("FlashReg TimerInt read val=0x%08x\n", ret);
3168 break;
3169
3170 default:
3171 DPRINTF("ioport read(l) addr=0x%x via read(b)\n", addr);
3172
3173 ret = rtl8139_io_readb(opaque, addr);
3174 ret |= rtl8139_io_readb(opaque, addr + 1) << 8;
3175 ret |= rtl8139_io_readb(opaque, addr + 2) << 16;
3176 ret |= rtl8139_io_readb(opaque, addr + 3) << 24;
3177
3178 DPRINTF("read(l) addr=0x%x val=%08x\n", addr, ret);
3179 break;
3180 }
3181
3182 return ret;
3183 }
3184
3185 /* */
3186
3187 static void rtl8139_ioport_writeb(void *opaque, uint32_t addr, uint32_t val)
3188 {
3189 rtl8139_io_writeb(opaque, addr & 0xFF, val);
3190 }
3191
3192 static void rtl8139_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
3193 {
3194 rtl8139_io_writew(opaque, addr & 0xFF, val);
3195 }
3196
3197 static void rtl8139_ioport_writel(void *opaque, uint32_t addr, uint32_t val)
3198 {
3199 rtl8139_io_writel(opaque, addr & 0xFF, val);
3200 }
3201
3202 static uint32_t rtl8139_ioport_readb(void *opaque, uint32_t addr)
3203 {
3204 return rtl8139_io_readb(opaque, addr & 0xFF);
3205 }
3206
3207 static uint32_t rtl8139_ioport_readw(void *opaque, uint32_t addr)
3208 {
3209 return rtl8139_io_readw(opaque, addr & 0xFF);
3210 }
3211
3212 static uint32_t rtl8139_ioport_readl(void *opaque, uint32_t addr)
3213 {
3214 return rtl8139_io_readl(opaque, addr & 0xFF);
3215 }
3216
3217 /* */
3218
3219 static void rtl8139_mmio_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
3220 {
3221 rtl8139_io_writeb(opaque, addr & 0xFF, val);
3222 }
3223
3224 static void rtl8139_mmio_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
3225 {
3226 rtl8139_io_writew(opaque, addr & 0xFF, val);
3227 }
3228
3229 static void rtl8139_mmio_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
3230 {
3231 rtl8139_io_writel(opaque, addr & 0xFF, val);
3232 }
3233
3234 static uint32_t rtl8139_mmio_readb(void *opaque, target_phys_addr_t addr)
3235 {
3236 return rtl8139_io_readb(opaque, addr & 0xFF);
3237 }
3238
3239 static uint32_t rtl8139_mmio_readw(void *opaque, target_phys_addr_t addr)
3240 {
3241 uint32_t val = rtl8139_io_readw(opaque, addr & 0xFF);
3242 return val;
3243 }
3244
3245 static uint32_t rtl8139_mmio_readl(void *opaque, target_phys_addr_t addr)
3246 {
3247 uint32_t val = rtl8139_io_readl(opaque, addr & 0xFF);
3248 return val;
3249 }
3250
3251 static int rtl8139_post_load(void *opaque, int version_id)
3252 {
3253 RTL8139State* s = opaque;
3254 rtl8139_set_next_tctr_time(s, qemu_get_clock_ns(vm_clock));
3255 if (version_id < 4) {
3256 s->cplus_enabled = s->CpCmd != 0;
3257 }
3258
3259 return 0;
3260 }
3261
3262 static bool rtl8139_hotplug_ready_needed(void *opaque)
3263 {
3264 return qdev_machine_modified();
3265 }
3266
3267 static const VMStateDescription vmstate_rtl8139_hotplug_ready ={
3268 .name = "rtl8139/hotplug_ready",
3269 .version_id = 1,
3270 .minimum_version_id = 1,
3271 .minimum_version_id_old = 1,
3272 .fields = (VMStateField []) {
3273 VMSTATE_END_OF_LIST()
3274 }
3275 };
3276
3277 static void rtl8139_pre_save(void *opaque)
3278 {
3279 RTL8139State* s = opaque;
3280 int64_t current_time = qemu_get_clock_ns(vm_clock);
3281
3282 /* set IntrStatus correctly */
3283 rtl8139_set_next_tctr_time(s, current_time);
3284 s->TCTR = muldiv64(current_time - s->TCTR_base, PCI_FREQUENCY,
3285 get_ticks_per_sec());
3286 s->rtl8139_mmio_io_addr_dummy = 0;
3287 }
3288
3289 static const VMStateDescription vmstate_rtl8139 = {
3290 .name = "rtl8139",
3291 .version_id = 4,
3292 .minimum_version_id = 3,
3293 .minimum_version_id_old = 3,
3294 .post_load = rtl8139_post_load,
3295 .pre_save = rtl8139_pre_save,
3296 .fields = (VMStateField []) {
3297 VMSTATE_PCI_DEVICE(dev, RTL8139State),
3298 VMSTATE_PARTIAL_BUFFER(phys, RTL8139State, 6),
3299 VMSTATE_BUFFER(mult, RTL8139State),
3300 VMSTATE_UINT32_ARRAY(TxStatus, RTL8139State, 4),
3301 VMSTATE_UINT32_ARRAY(TxAddr, RTL8139State, 4),
3302
3303 VMSTATE_UINT32(RxBuf, RTL8139State),
3304 VMSTATE_UINT32(RxBufferSize, RTL8139State),
3305 VMSTATE_UINT32(RxBufPtr, RTL8139State),
3306 VMSTATE_UINT32(RxBufAddr, RTL8139State),
3307
3308 VMSTATE_UINT16(IntrStatus, RTL8139State),
3309 VMSTATE_UINT16(IntrMask, RTL8139State),
3310
3311 VMSTATE_UINT32(TxConfig, RTL8139State),
3312 VMSTATE_UINT32(RxConfig, RTL8139State),
3313 VMSTATE_UINT32(RxMissed, RTL8139State),
3314 VMSTATE_UINT16(CSCR, RTL8139State),
3315
3316 VMSTATE_UINT8(Cfg9346, RTL8139State),
3317 VMSTATE_UINT8(Config0, RTL8139State),
3318 VMSTATE_UINT8(Config1, RTL8139State),
3319 VMSTATE_UINT8(Config3, RTL8139State),
3320 VMSTATE_UINT8(Config4, RTL8139State),
3321 VMSTATE_UINT8(Config5, RTL8139State),
3322
3323 VMSTATE_UINT8(clock_enabled, RTL8139State),
3324 VMSTATE_UINT8(bChipCmdState, RTL8139State),
3325
3326 VMSTATE_UINT16(MultiIntr, RTL8139State),
3327
3328 VMSTATE_UINT16(BasicModeCtrl, RTL8139State),
3329 VMSTATE_UINT16(BasicModeStatus, RTL8139State),
3330 VMSTATE_UINT16(NWayAdvert, RTL8139State),
3331 VMSTATE_UINT16(NWayLPAR, RTL8139State),
3332 VMSTATE_UINT16(NWayExpansion, RTL8139State),
3333
3334 VMSTATE_UINT16(CpCmd, RTL8139State),
3335 VMSTATE_UINT8(TxThresh, RTL8139State),
3336
3337 VMSTATE_UNUSED(4),
3338 VMSTATE_MACADDR(conf.macaddr, RTL8139State),
3339 VMSTATE_INT32(rtl8139_mmio_io_addr_dummy, RTL8139State),
3340
3341 VMSTATE_UINT32(currTxDesc, RTL8139State),
3342 VMSTATE_UINT32(currCPlusRxDesc, RTL8139State),
3343 VMSTATE_UINT32(currCPlusTxDesc, RTL8139State),
3344 VMSTATE_UINT32(RxRingAddrLO, RTL8139State),
3345 VMSTATE_UINT32(RxRingAddrHI, RTL8139State),
3346
3347 VMSTATE_UINT16_ARRAY(eeprom.contents, RTL8139State, EEPROM_9346_SIZE),
3348 VMSTATE_INT32(eeprom.mode, RTL8139State),
3349 VMSTATE_UINT32(eeprom.tick, RTL8139State),
3350 VMSTATE_UINT8(eeprom.address, RTL8139State),
3351 VMSTATE_UINT16(eeprom.input, RTL8139State),
3352 VMSTATE_UINT16(eeprom.output, RTL8139State),
3353
3354 VMSTATE_UINT8(eeprom.eecs, RTL8139State),
3355 VMSTATE_UINT8(eeprom.eesk, RTL8139State),
3356 VMSTATE_UINT8(eeprom.eedi, RTL8139State),
3357 VMSTATE_UINT8(eeprom.eedo, RTL8139State),
3358
3359 VMSTATE_UINT32(TCTR, RTL8139State),
3360 VMSTATE_UINT32(TimerInt, RTL8139State),
3361 VMSTATE_INT64(TCTR_base, RTL8139State),
3362
3363 VMSTATE_STRUCT(tally_counters, RTL8139State, 0,
3364 vmstate_tally_counters, RTL8139TallyCounters),
3365
3366 VMSTATE_UINT32_V(cplus_enabled, RTL8139State, 4),
3367 VMSTATE_END_OF_LIST()
3368 },
3369 .subsections = (VMStateSubsection []) {
3370 {
3371 .vmsd = &vmstate_rtl8139_hotplug_ready,
3372 .needed = rtl8139_hotplug_ready_needed,
3373 }, {
3374 /* empty */
3375 }
3376 }
3377 };
3378
3379 /***********************************************************/
3380 /* PCI RTL8139 definitions */
3381
3382 static const MemoryRegionPortio rtl8139_portio[] = {
3383 { 0, 0x100, 1, .read = rtl8139_ioport_readb, },
3384 { 0, 0x100, 1, .write = rtl8139_ioport_writeb, },
3385 { 0, 0x100, 2, .read = rtl8139_ioport_readw, },
3386 { 0, 0x100, 2, .write = rtl8139_ioport_writew, },
3387 { 0, 0x100, 4, .read = rtl8139_ioport_readl, },
3388 { 0, 0x100, 4, .write = rtl8139_ioport_writel, },
3389 PORTIO_END_OF_LIST()
3390 };
3391
3392 static const MemoryRegionOps rtl8139_io_ops = {
3393 .old_portio = rtl8139_portio,
3394 .endianness = DEVICE_LITTLE_ENDIAN,
3395 };
3396
3397 static const MemoryRegionOps rtl8139_mmio_ops = {
3398 .old_mmio = {
3399 .read = {
3400 rtl8139_mmio_readb,
3401 rtl8139_mmio_readw,
3402 rtl8139_mmio_readl,
3403 },
3404 .write = {
3405 rtl8139_mmio_writeb,
3406 rtl8139_mmio_writew,
3407 rtl8139_mmio_writel,
3408 },
3409 },
3410 .endianness = DEVICE_LITTLE_ENDIAN,
3411 };
3412
3413 static void rtl8139_timer(void *opaque)
3414 {
3415 RTL8139State *s = opaque;
3416
3417 if (!s->clock_enabled)
3418 {
3419 DPRINTF(">>> timer: clock is not running\n");
3420 return;
3421 }
3422
3423 s->IntrStatus |= PCSTimeout;
3424 rtl8139_update_irq(s);
3425 rtl8139_set_next_tctr_time(s, qemu_get_clock_ns(vm_clock));
3426 }
3427
3428 static void rtl8139_cleanup(VLANClientState *nc)
3429 {
3430 RTL8139State *s = DO_UPCAST(NICState, nc, nc)->opaque;
3431
3432 s->nic = NULL;
3433 }
3434
3435 static int pci_rtl8139_uninit(PCIDevice *dev)
3436 {
3437 RTL8139State *s = DO_UPCAST(RTL8139State, dev, dev);
3438
3439 memory_region_destroy(&s->bar_io);
3440 memory_region_destroy(&s->bar_mem);
3441 if (s->cplus_txbuffer) {
3442 g_free(s->cplus_txbuffer);
3443 s->cplus_txbuffer = NULL;
3444 }
3445 qemu_del_timer(s->timer);
3446 qemu_free_timer(s->timer);
3447 qemu_del_vlan_client(&s->nic->nc);
3448 return 0;
3449 }
3450
3451 static NetClientInfo net_rtl8139_info = {
3452 .type = NET_CLIENT_TYPE_NIC,
3453 .size = sizeof(NICState),
3454 .can_receive = rtl8139_can_receive,
3455 .receive = rtl8139_receive,
3456 .cleanup = rtl8139_cleanup,
3457 };
3458
3459 static int pci_rtl8139_init(PCIDevice *dev)
3460 {
3461 RTL8139State * s = DO_UPCAST(RTL8139State, dev, dev);
3462 uint8_t *pci_conf;
3463
3464 pci_conf = s->dev.config;
3465 pci_conf[PCI_INTERRUPT_PIN] = 1; /* interrupt pin A */
3466 /* TODO: start of capability list, but no capability
3467 * list bit in status register, and offset 0xdc seems unused. */
3468 pci_conf[PCI_CAPABILITY_LIST] = 0xdc;
3469
3470 memory_region_init_io(&s->bar_io, &rtl8139_io_ops, s, "rtl8139", 0x100);
3471 memory_region_init_io(&s->bar_mem, &rtl8139_mmio_ops, s, "rtl8139", 0x100);
3472 pci_register_bar(&s->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->bar_io);
3473 pci_register_bar(&s->dev, 1, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->bar_mem);
3474
3475 qemu_macaddr_default_if_unset(&s->conf.macaddr);
3476
3477 /* prepare eeprom */
3478 s->eeprom.contents[0] = 0x8129;
3479 #if 1
3480 /* PCI vendor and device ID should be mirrored here */
3481 s->eeprom.contents[1] = PCI_VENDOR_ID_REALTEK;
3482 s->eeprom.contents[2] = PCI_DEVICE_ID_REALTEK_8139;
3483 #endif
3484 s->eeprom.contents[7] = s->conf.macaddr.a[0] | s->conf.macaddr.a[1] << 8;
3485 s->eeprom.contents[8] = s->conf.macaddr.a[2] | s->conf.macaddr.a[3] << 8;
3486 s->eeprom.contents[9] = s->conf.macaddr.a[4] | s->conf.macaddr.a[5] << 8;
3487
3488 s->nic = qemu_new_nic(&net_rtl8139_info, &s->conf,
3489 object_get_typename(OBJECT(dev)), dev->qdev.id, s);
3490 qemu_format_nic_info_str(&s->nic->nc, s->conf.macaddr.a);
3491
3492 s->cplus_txbuffer = NULL;
3493 s->cplus_txbuffer_len = 0;
3494 s->cplus_txbuffer_offset = 0;
3495
3496 s->TimerExpire = 0;
3497 s->timer = qemu_new_timer_ns(vm_clock, rtl8139_timer, s);
3498 rtl8139_set_next_tctr_time(s, qemu_get_clock_ns(vm_clock));
3499
3500 add_boot_device_path(s->conf.bootindex, &dev->qdev, "/ethernet-phy@0");
3501
3502 return 0;
3503 }
3504
3505 static Property rtl8139_properties[] = {
3506 DEFINE_NIC_PROPERTIES(RTL8139State, conf),
3507 DEFINE_PROP_END_OF_LIST(),
3508 };
3509
3510 static void rtl8139_class_init(ObjectClass *klass, void *data)
3511 {
3512 DeviceClass *dc = DEVICE_CLASS(klass);
3513 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
3514
3515 k->init = pci_rtl8139_init;
3516 k->exit = pci_rtl8139_uninit;
3517 k->romfile = "pxe-rtl8139.rom";
3518 k->vendor_id = PCI_VENDOR_ID_REALTEK;
3519 k->device_id = PCI_DEVICE_ID_REALTEK_8139;
3520 k->revision = RTL8139_PCI_REVID; /* >=0x20 is for 8139C+ */
3521 k->class_id = PCI_CLASS_NETWORK_ETHERNET;
3522 dc->reset = rtl8139_reset;
3523 dc->vmsd = &vmstate_rtl8139;
3524 dc->props = rtl8139_properties;
3525 }
3526
3527 static TypeInfo rtl8139_info = {
3528 .name = "rtl8139",
3529 .parent = TYPE_PCI_DEVICE,
3530 .instance_size = sizeof(RTL8139State),
3531 .class_init = rtl8139_class_init,
3532 };
3533
3534 static void rtl8139_register_types(void)
3535 {
3536 type_register_static(&rtl8139_info);
3537 }
3538
3539 type_init(rtl8139_register_types)
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