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rtl8139: Fix receive buffer overflow check
[qemu/ar7.git] / hw / net / rtl8139.c
blob960580b910b73aa0799fa27c9f003b2dc3a7edd9
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/hw.h"
55 #include "hw/pci/pci.h"
56 #include "sysemu/dma.h"
57 #include "qemu/timer.h"
58 #include "net/net.h"
59 #include "net/eth.h"
60 #include "hw/loader.h"
61 #include "sysemu/sysemu.h"
62 #include "qemu/iov.h"
63
64 /* debug RTL8139 card */
65 //#define DEBUG_RTL8139 1
66
67 #define PCI_FREQUENCY 33000000L
68
69 #define SET_MASKED(input, mask, curr) \
70 ( ( (input) & ~(mask) ) | ( (curr) & (mask) ) )
71
72 /* arg % size for size which is a power of 2 */
73 #define MOD2(input, size) \
74 ( ( input ) & ( size - 1 ) )
75
76 #define ETHER_TYPE_LEN 2
77 #define ETH_HLEN (ETH_ALEN * 2 + ETHER_TYPE_LEN)
78 #define ETH_MTU 1500
79
80 #define VLAN_TCI_LEN 2
81 #define VLAN_HLEN (ETHER_TYPE_LEN + VLAN_TCI_LEN)
82
83 #if defined (DEBUG_RTL8139)
84 # define DPRINTF(fmt, ...) \
85 do { fprintf(stderr, "RTL8139: " fmt, ## __VA_ARGS__); } while (0)
86 #else
87 static inline GCC_FMT_ATTR(1, 2) int DPRINTF(const char *fmt, ...)
88 {
89 return 0;
90 }
91 #endif
92
93 #define TYPE_RTL8139 "rtl8139"
94
95 #define RTL8139(obj) \
96 OBJECT_CHECK(RTL8139State, (obj), TYPE_RTL8139)
97
98 /* Symbolic offsets to registers. */
99 enum RTL8139_registers {
100 MAC0 = 0, /* Ethernet hardware address. */
101 MAR0 = 8, /* Multicast filter. */
102 TxStatus0 = 0x10,/* Transmit status (Four 32bit registers). C mode only */
103 /* Dump Tally Conter control register(64bit). C+ mode only */
104 TxAddr0 = 0x20, /* Tx descriptors (also four 32bit). */
105 RxBuf = 0x30,
106 ChipCmd = 0x37,
107 RxBufPtr = 0x38,
108 RxBufAddr = 0x3A,
109 IntrMask = 0x3C,
110 IntrStatus = 0x3E,
111 TxConfig = 0x40,
112 RxConfig = 0x44,
113 Timer = 0x48, /* A general-purpose counter. */
114 RxMissed = 0x4C, /* 24 bits valid, write clears. */
115 Cfg9346 = 0x50,
116 Config0 = 0x51,
117 Config1 = 0x52,
118 FlashReg = 0x54,
119 MediaStatus = 0x58,
120 Config3 = 0x59,
121 Config4 = 0x5A, /* absent on RTL-8139A */
122 HltClk = 0x5B,
123 MultiIntr = 0x5C,
124 PCIRevisionID = 0x5E,
125 TxSummary = 0x60, /* TSAD register. Transmit Status of All Descriptors*/
126 BasicModeCtrl = 0x62,
127 BasicModeStatus = 0x64,
128 NWayAdvert = 0x66,
129 NWayLPAR = 0x68,
130 NWayExpansion = 0x6A,
131 /* Undocumented registers, but required for proper operation. */
132 FIFOTMS = 0x70, /* FIFO Control and test. */
133 CSCR = 0x74, /* Chip Status and Configuration Register. */
134 PARA78 = 0x78,
135 PARA7c = 0x7c, /* Magic transceiver parameter register. */
136 Config5 = 0xD8, /* absent on RTL-8139A */
137 /* C+ mode */
138 TxPoll = 0xD9, /* Tell chip to check Tx descriptors for work */
139 RxMaxSize = 0xDA, /* Max size of an Rx packet (8169 only) */
140 CpCmd = 0xE0, /* C+ Command register (C+ mode only) */
141 IntrMitigate = 0xE2, /* rx/tx interrupt mitigation control */
142 RxRingAddrLO = 0xE4, /* 64-bit start addr of Rx ring */
143 RxRingAddrHI = 0xE8, /* 64-bit start addr of Rx ring */
144 TxThresh = 0xEC, /* Early Tx threshold */
145 };
146
147 enum ClearBitMasks {
148 MultiIntrClear = 0xF000,
149 ChipCmdClear = 0xE2,
150 Config1Clear = (1<<7)|(1<<6)|(1<<3)|(1<<2)|(1<<1),
151 };
152
153 enum ChipCmdBits {
154 CmdReset = 0x10,
155 CmdRxEnb = 0x08,
156 CmdTxEnb = 0x04,
157 RxBufEmpty = 0x01,
158 };
159
160 /* C+ mode */
161 enum CplusCmdBits {
162 CPlusRxVLAN = 0x0040, /* enable receive VLAN detagging */
163 CPlusRxChkSum = 0x0020, /* enable receive checksum offloading */
164 CPlusRxEnb = 0x0002,
165 CPlusTxEnb = 0x0001,
166 };
167
168 /* Interrupt register bits, using my own meaningful names. */
169 enum IntrStatusBits {
170 PCIErr = 0x8000,
171 PCSTimeout = 0x4000,
172 RxFIFOOver = 0x40,
173 RxUnderrun = 0x20, /* Packet Underrun / Link Change */
174 RxOverflow = 0x10,
175 TxErr = 0x08,
176 TxOK = 0x04,
177 RxErr = 0x02,
178 RxOK = 0x01,
179
180 RxAckBits = RxFIFOOver | RxOverflow | RxOK,
181 };
182
183 enum TxStatusBits {
184 TxHostOwns = 0x2000,
185 TxUnderrun = 0x4000,
186 TxStatOK = 0x8000,
187 TxOutOfWindow = 0x20000000,
188 TxAborted = 0x40000000,
189 TxCarrierLost = 0x80000000,
190 };
191 enum RxStatusBits {
192 RxMulticast = 0x8000,
193 RxPhysical = 0x4000,
194 RxBroadcast = 0x2000,
195 RxBadSymbol = 0x0020,
196 RxRunt = 0x0010,
197 RxTooLong = 0x0008,
198 RxCRCErr = 0x0004,
199 RxBadAlign = 0x0002,
200 RxStatusOK = 0x0001,
201 };
202
203 /* Bits in RxConfig. */
204 enum rx_mode_bits {
205 AcceptErr = 0x20,
206 AcceptRunt = 0x10,
207 AcceptBroadcast = 0x08,
208 AcceptMulticast = 0x04,
209 AcceptMyPhys = 0x02,
210 AcceptAllPhys = 0x01,
211 };
212
213 /* Bits in TxConfig. */
214 enum tx_config_bits {
215
216 /* Interframe Gap Time. Only TxIFG96 doesn't violate IEEE 802.3 */
217 TxIFGShift = 24,
218 TxIFG84 = (0 << TxIFGShift), /* 8.4us / 840ns (10 / 100Mbps) */
219 TxIFG88 = (1 << TxIFGShift), /* 8.8us / 880ns (10 / 100Mbps) */
220 TxIFG92 = (2 << TxIFGShift), /* 9.2us / 920ns (10 / 100Mbps) */
221 TxIFG96 = (3 << TxIFGShift), /* 9.6us / 960ns (10 / 100Mbps) */
222
223 TxLoopBack = (1 << 18) | (1 << 17), /* enable loopback test mode */
224 TxCRC = (1 << 16), /* DISABLE appending CRC to end of Tx packets */
225 TxClearAbt = (1 << 0), /* Clear abort (WO) */
226 TxDMAShift = 8, /* DMA burst value (0-7) is shifted this many bits */
227 TxRetryShift = 4, /* TXRR value (0-15) is shifted this many bits */
228
229 TxVersionMask = 0x7C800000, /* mask out version bits 30-26, 23 */
230 };
231
232
233 /* Transmit Status of All Descriptors (TSAD) Register */
234 enum TSAD_bits {
235 TSAD_TOK3 = 1<<15, // TOK bit of Descriptor 3
236 TSAD_TOK2 = 1<<14, // TOK bit of Descriptor 2
237 TSAD_TOK1 = 1<<13, // TOK bit of Descriptor 1
238 TSAD_TOK0 = 1<<12, // TOK bit of Descriptor 0
239 TSAD_TUN3 = 1<<11, // TUN bit of Descriptor 3
240 TSAD_TUN2 = 1<<10, // TUN bit of Descriptor 2
241 TSAD_TUN1 = 1<<9, // TUN bit of Descriptor 1
242 TSAD_TUN0 = 1<<8, // TUN bit of Descriptor 0
243 TSAD_TABT3 = 1<<07, // TABT bit of Descriptor 3
244 TSAD_TABT2 = 1<<06, // TABT bit of Descriptor 2
245 TSAD_TABT1 = 1<<05, // TABT bit of Descriptor 1
246 TSAD_TABT0 = 1<<04, // TABT bit of Descriptor 0
247 TSAD_OWN3 = 1<<03, // OWN bit of Descriptor 3
248 TSAD_OWN2 = 1<<02, // OWN bit of Descriptor 2
249 TSAD_OWN1 = 1<<01, // OWN bit of Descriptor 1
250 TSAD_OWN0 = 1<<00, // OWN bit of Descriptor 0
251 };
252
253
254 /* Bits in Config1 */
255 enum Config1Bits {
256 Cfg1_PM_Enable = 0x01,
257 Cfg1_VPD_Enable = 0x02,
258 Cfg1_PIO = 0x04,
259 Cfg1_MMIO = 0x08,
260 LWAKE = 0x10, /* not on 8139, 8139A */
261 Cfg1_Driver_Load = 0x20,
262 Cfg1_LED0 = 0x40,
263 Cfg1_LED1 = 0x80,
264 SLEEP = (1 << 1), /* only on 8139, 8139A */
265 PWRDN = (1 << 0), /* only on 8139, 8139A */
266 };
267
268 /* Bits in Config3 */
269 enum Config3Bits {
270 Cfg3_FBtBEn = (1 << 0), /* 1 = Fast Back to Back */
271 Cfg3_FuncRegEn = (1 << 1), /* 1 = enable CardBus Function registers */
272 Cfg3_CLKRUN_En = (1 << 2), /* 1 = enable CLKRUN */
273 Cfg3_CardB_En = (1 << 3), /* 1 = enable CardBus registers */
274 Cfg3_LinkUp = (1 << 4), /* 1 = wake up on link up */
275 Cfg3_Magic = (1 << 5), /* 1 = wake up on Magic Packet (tm) */
276 Cfg3_PARM_En = (1 << 6), /* 0 = software can set twister parameters */
277 Cfg3_GNTSel = (1 << 7), /* 1 = delay 1 clock from PCI GNT signal */
278 };
279
280 /* Bits in Config4 */
281 enum Config4Bits {
282 LWPTN = (1 << 2), /* not on 8139, 8139A */
283 };
284
285 /* Bits in Config5 */
286 enum Config5Bits {
287 Cfg5_PME_STS = (1 << 0), /* 1 = PCI reset resets PME_Status */
288 Cfg5_LANWake = (1 << 1), /* 1 = enable LANWake signal */
289 Cfg5_LDPS = (1 << 2), /* 0 = save power when link is down */
290 Cfg5_FIFOAddrPtr = (1 << 3), /* Realtek internal SRAM testing */
291 Cfg5_UWF = (1 << 4), /* 1 = accept unicast wakeup frame */
292 Cfg5_MWF = (1 << 5), /* 1 = accept multicast wakeup frame */
293 Cfg5_BWF = (1 << 6), /* 1 = accept broadcast wakeup frame */
294 };
295
296 enum RxConfigBits {
297 /* rx fifo threshold */
298 RxCfgFIFOShift = 13,
299 RxCfgFIFONone = (7 << RxCfgFIFOShift),
300
301 /* Max DMA burst */
302 RxCfgDMAShift = 8,
303 RxCfgDMAUnlimited = (7 << RxCfgDMAShift),
304
305 /* rx ring buffer length */
306 RxCfgRcv8K = 0,
307 RxCfgRcv16K = (1 << 11),
308 RxCfgRcv32K = (1 << 12),
309 RxCfgRcv64K = (1 << 11) | (1 << 12),
310
311 /* Disable packet wrap at end of Rx buffer. (not possible with 64k) */
312 RxNoWrap = (1 << 7),
313 };
314
315 /* Twister tuning parameters from RealTek.
316 Completely undocumented, but required to tune bad links on some boards. */
317 /*
318 enum CSCRBits {
319 CSCR_LinkOKBit = 0x0400,
320 CSCR_LinkChangeBit = 0x0800,
321 CSCR_LinkStatusBits = 0x0f000,
322 CSCR_LinkDownOffCmd = 0x003c0,
323 CSCR_LinkDownCmd = 0x0f3c0,
324 */
325 enum CSCRBits {
326 CSCR_Testfun = 1<<15, /* 1 = Auto-neg speeds up internal timer, WO, def 0 */
327 CSCR_LD = 1<<9, /* Active low TPI link disable signal. When low, TPI still transmits link pulses and TPI stays in good link state. def 1*/
328 CSCR_HEART_BIT = 1<<8, /* 1 = HEART BEAT enable, 0 = HEART BEAT disable. HEART BEAT function is only valid in 10Mbps mode. def 1*/
329 CSCR_JBEN = 1<<7, /* 1 = enable jabber function. 0 = disable jabber function, def 1*/
330 CSCR_F_LINK_100 = 1<<6, /* Used to login force good link in 100Mbps for diagnostic purposes. 1 = DISABLE, 0 = ENABLE. def 1*/
331 CSCR_F_Connect = 1<<5, /* Assertion of this bit forces the disconnect function to be bypassed. def 0*/
332 CSCR_Con_status = 1<<3, /* This bit indicates the status of the connection. 1 = valid connected link detected; 0 = disconnected link detected. RO def 0*/
333 CSCR_Con_status_En = 1<<2, /* Assertion of this bit configures LED1 pin to indicate connection status. def 0*/
334 CSCR_PASS_SCR = 1<<0, /* Bypass Scramble, def 0*/
335 };
336
337 enum Cfg9346Bits {
338 Cfg9346_Normal = 0x00,
339 Cfg9346_Autoload = 0x40,
340 Cfg9346_Programming = 0x80,
341 Cfg9346_ConfigWrite = 0xC0,
342 };
343
344 typedef enum {
345 CH_8139 = 0,
346 CH_8139_K,
347 CH_8139A,
348 CH_8139A_G,
349 CH_8139B,
350 CH_8130,
351 CH_8139C,
352 CH_8100,
353 CH_8100B_8139D,
354 CH_8101,
355 } chip_t;
356
357 enum chip_flags {
358 HasHltClk = (1 << 0),
359 HasLWake = (1 << 1),
360 };
361
362 #define HW_REVID(b30, b29, b28, b27, b26, b23, b22) \
363 (b30<<30 | b29<<29 | b28<<28 | b27<<27 | b26<<26 | b23<<23 | b22<<22)
364 #define HW_REVID_MASK HW_REVID(1, 1, 1, 1, 1, 1, 1)
365
366 #define RTL8139_PCI_REVID_8139 0x10
367 #define RTL8139_PCI_REVID_8139CPLUS 0x20
368
369 #define RTL8139_PCI_REVID RTL8139_PCI_REVID_8139CPLUS
370
371 /* Size is 64 * 16bit words */
372 #define EEPROM_9346_ADDR_BITS 6
373 #define EEPROM_9346_SIZE (1 << EEPROM_9346_ADDR_BITS)
374 #define EEPROM_9346_ADDR_MASK (EEPROM_9346_SIZE - 1)
375
376 enum Chip9346Operation
377 {
378 Chip9346_op_mask = 0xc0, /* 10 zzzzzz */
379 Chip9346_op_read = 0x80, /* 10 AAAAAA */
380 Chip9346_op_write = 0x40, /* 01 AAAAAA D(15)..D(0) */
381 Chip9346_op_ext_mask = 0xf0, /* 11 zzzzzz */
382 Chip9346_op_write_enable = 0x30, /* 00 11zzzz */
383 Chip9346_op_write_all = 0x10, /* 00 01zzzz */
384 Chip9346_op_write_disable = 0x00, /* 00 00zzzz */
385 };
386
387 enum Chip9346Mode
388 {
389 Chip9346_none = 0,
390 Chip9346_enter_command_mode,
391 Chip9346_read_command,
392 Chip9346_data_read, /* from output register */
393 Chip9346_data_write, /* to input register, then to contents at specified address */
394 Chip9346_data_write_all, /* to input register, then filling contents */
395 };
396
397 typedef struct EEprom9346
398 {
399 uint16_t contents[EEPROM_9346_SIZE];
400 int mode;
401 uint32_t tick;
402 uint8_t address;
403 uint16_t input;
404 uint16_t output;
405
406 uint8_t eecs;
407 uint8_t eesk;
408 uint8_t eedi;
409 uint8_t eedo;
410 } EEprom9346;
411
412 typedef struct RTL8139TallyCounters
413 {
414 /* Tally counters */
415 uint64_t TxOk;
416 uint64_t RxOk;
417 uint64_t TxERR;
418 uint32_t RxERR;
419 uint16_t MissPkt;
420 uint16_t FAE;
421 uint32_t Tx1Col;
422 uint32_t TxMCol;
423 uint64_t RxOkPhy;
424 uint64_t RxOkBrd;
425 uint32_t RxOkMul;
426 uint16_t TxAbt;
427 uint16_t TxUndrn;
428 } RTL8139TallyCounters;
429
430 /* Clears all tally counters */
431 static void RTL8139TallyCounters_clear(RTL8139TallyCounters* counters);
432
433 typedef struct RTL8139State {
434 /*< private >*/
435 PCIDevice parent_obj;
436 /*< public >*/
437
438 uint8_t phys[8]; /* mac address */
439 uint8_t mult[8]; /* multicast mask array */
440
441 uint32_t TxStatus[4]; /* TxStatus0 in C mode*/ /* also DTCCR[0] and DTCCR[1] in C+ mode */
442 uint32_t TxAddr[4]; /* TxAddr0 */
443 uint32_t RxBuf; /* Receive buffer */
444 uint32_t RxBufferSize;/* internal variable, receive ring buffer size in C mode */
445 uint32_t RxBufPtr;
446 uint32_t RxBufAddr;
447
448 uint16_t IntrStatus;
449 uint16_t IntrMask;
450
451 uint32_t TxConfig;
452 uint32_t RxConfig;
453 uint32_t RxMissed;
454
455 uint16_t CSCR;
456
457 uint8_t Cfg9346;
458 uint8_t Config0;
459 uint8_t Config1;
460 uint8_t Config3;
461 uint8_t Config4;
462 uint8_t Config5;
463
464 uint8_t clock_enabled;
465 uint8_t bChipCmdState;
466
467 uint16_t MultiIntr;
468
469 uint16_t BasicModeCtrl;
470 uint16_t BasicModeStatus;
471 uint16_t NWayAdvert;
472 uint16_t NWayLPAR;
473 uint16_t NWayExpansion;
474
475 uint16_t CpCmd;
476 uint8_t TxThresh;
477
478 NICState *nic;
479 NICConf conf;
480
481 /* C ring mode */
482 uint32_t currTxDesc;
483
484 /* C+ mode */
485 uint32_t cplus_enabled;
486
487 uint32_t currCPlusRxDesc;
488 uint32_t currCPlusTxDesc;
489
490 uint32_t RxRingAddrLO;
491 uint32_t RxRingAddrHI;
492
493 EEprom9346 eeprom;
494
495 uint32_t TCTR;
496 uint32_t TimerInt;
497 int64_t TCTR_base;
498
499 /* Tally counters */
500 RTL8139TallyCounters tally_counters;
501
502 /* Non-persistent data */
503 uint8_t *cplus_txbuffer;
504 int cplus_txbuffer_len;
505 int cplus_txbuffer_offset;
506
507 /* PCI interrupt timer */
508 QEMUTimer *timer;
509
510 MemoryRegion bar_io;
511 MemoryRegion bar_mem;
512
513 /* Support migration to/from old versions */
514 int rtl8139_mmio_io_addr_dummy;
515 } RTL8139State;
516
517 /* Writes tally counters to memory via DMA */
518 static void RTL8139TallyCounters_dma_write(RTL8139State *s, dma_addr_t tc_addr);
519
520 static void rtl8139_set_next_tctr_time(RTL8139State *s);
521
522 static void prom9346_decode_command(EEprom9346 *eeprom, uint8_t command)
523 {
524 DPRINTF("eeprom command 0x%02x\n", command);
525
526 switch (command & Chip9346_op_mask)
527 {
528 case Chip9346_op_read:
529 {
530 eeprom->address = command & EEPROM_9346_ADDR_MASK;
531 eeprom->output = eeprom->contents[eeprom->address];
532 eeprom->eedo = 0;
533 eeprom->tick = 0;
534 eeprom->mode = Chip9346_data_read;
535 DPRINTF("eeprom read from address 0x%02x data=0x%04x\n",
536 eeprom->address, eeprom->output);
537 }
538 break;
539
540 case Chip9346_op_write:
541 {
542 eeprom->address = command & EEPROM_9346_ADDR_MASK;
543 eeprom->input = 0;
544 eeprom->tick = 0;
545 eeprom->mode = Chip9346_none; /* Chip9346_data_write */
546 DPRINTF("eeprom begin write to address 0x%02x\n",
547 eeprom->address);
548 }
549 break;
550 default:
551 eeprom->mode = Chip9346_none;
552 switch (command & Chip9346_op_ext_mask)
553 {
554 case Chip9346_op_write_enable:
555 DPRINTF("eeprom write enabled\n");
556 break;
557 case Chip9346_op_write_all:
558 DPRINTF("eeprom begin write all\n");
559 break;
560 case Chip9346_op_write_disable:
561 DPRINTF("eeprom write disabled\n");
562 break;
563 }
564 break;
565 }
566 }
567
568 static void prom9346_shift_clock(EEprom9346 *eeprom)
569 {
570 int bit = eeprom->eedi?1:0;
571
572 ++ eeprom->tick;
573
574 DPRINTF("eeprom: tick %d eedi=%d eedo=%d\n", eeprom->tick, eeprom->eedi,
575 eeprom->eedo);
576
577 switch (eeprom->mode)
578 {
579 case Chip9346_enter_command_mode:
580 if (bit)
581 {
582 eeprom->mode = Chip9346_read_command;
583 eeprom->tick = 0;
584 eeprom->input = 0;
585 DPRINTF("eeprom: +++ synchronized, begin command read\n");
586 }
587 break;
588
589 case Chip9346_read_command:
590 eeprom->input = (eeprom->input << 1) | (bit & 1);
591 if (eeprom->tick == 8)
592 {
593 prom9346_decode_command(eeprom, eeprom->input & 0xff);
594 }
595 break;
596
597 case Chip9346_data_read:
598 eeprom->eedo = (eeprom->output & 0x8000)?1:0;
599 eeprom->output <<= 1;
600 if (eeprom->tick == 16)
601 {
602 #if 1
603 // the FreeBSD drivers (rl and re) don't explicitly toggle
604 // CS between reads (or does setting Cfg9346 to 0 count too?),
605 // so we need to enter wait-for-command state here
606 eeprom->mode = Chip9346_enter_command_mode;
607 eeprom->input = 0;
608 eeprom->tick = 0;
609
610 DPRINTF("eeprom: +++ end of read, awaiting next command\n");
611 #else
612 // original behaviour
613 ++eeprom->address;
614 eeprom->address &= EEPROM_9346_ADDR_MASK;
615 eeprom->output = eeprom->contents[eeprom->address];
616 eeprom->tick = 0;
617
618 DPRINTF("eeprom: +++ read next address 0x%02x data=0x%04x\n",
619 eeprom->address, eeprom->output);
620 #endif
621 }
622 break;
623
624 case Chip9346_data_write:
625 eeprom->input = (eeprom->input << 1) | (bit & 1);
626 if (eeprom->tick == 16)
627 {
628 DPRINTF("eeprom write to address 0x%02x data=0x%04x\n",
629 eeprom->address, eeprom->input);
630
631 eeprom->contents[eeprom->address] = eeprom->input;
632 eeprom->mode = Chip9346_none; /* waiting for next command after CS cycle */
633 eeprom->tick = 0;
634 eeprom->input = 0;
635 }
636 break;
637
638 case Chip9346_data_write_all:
639 eeprom->input = (eeprom->input << 1) | (bit & 1);
640 if (eeprom->tick == 16)
641 {
642 int i;
643 for (i = 0; i < EEPROM_9346_SIZE; i++)
644 {
645 eeprom->contents[i] = eeprom->input;
646 }
647 DPRINTF("eeprom filled with data=0x%04x\n", eeprom->input);
648
649 eeprom->mode = Chip9346_enter_command_mode;
650 eeprom->tick = 0;
651 eeprom->input = 0;
652 }
653 break;
654
655 default:
656 break;
657 }
658 }
659
660 static int prom9346_get_wire(RTL8139State *s)
661 {
662 EEprom9346 *eeprom = &s->eeprom;
663 if (!eeprom->eecs)
664 return 0;
665
666 return eeprom->eedo;
667 }
668
669 /* FIXME: This should be merged into/replaced by eeprom93xx.c. */
670 static void prom9346_set_wire(RTL8139State *s, int eecs, int eesk, int eedi)
671 {
672 EEprom9346 *eeprom = &s->eeprom;
673 uint8_t old_eecs = eeprom->eecs;
674 uint8_t old_eesk = eeprom->eesk;
675
676 eeprom->eecs = eecs;
677 eeprom->eesk = eesk;
678 eeprom->eedi = eedi;
679
680 DPRINTF("eeprom: +++ wires CS=%d SK=%d DI=%d DO=%d\n", eeprom->eecs,
681 eeprom->eesk, eeprom->eedi, eeprom->eedo);
682
683 if (!old_eecs && eecs)
684 {
685 /* Synchronize start */
686 eeprom->tick = 0;
687 eeprom->input = 0;
688 eeprom->output = 0;
689 eeprom->mode = Chip9346_enter_command_mode;
690
691 DPRINTF("=== eeprom: begin access, enter command mode\n");
692 }
693
694 if (!eecs)
695 {
696 DPRINTF("=== eeprom: end access\n");
697 return;
698 }
699
700 if (!old_eesk && eesk)
701 {
702 /* SK front rules */
703 prom9346_shift_clock(eeprom);
704 }
705 }
706
707 static void rtl8139_update_irq(RTL8139State *s)
708 {
709 PCIDevice *d = PCI_DEVICE(s);
710 int isr;
711 isr = (s->IntrStatus & s->IntrMask) & 0xffff;
712
713 DPRINTF("Set IRQ to %d (%04x %04x)\n", isr ? 1 : 0, s->IntrStatus,
714 s->IntrMask);
715
716 pci_set_irq(d, (isr != 0));
717 }
718
719 static int rtl8139_RxWrap(RTL8139State *s)
720 {
721 /* wrapping enabled; assume 1.5k more buffer space if size < 65536 */
722 return (s->RxConfig & (1 << 7));
723 }
724
725 static int rtl8139_receiver_enabled(RTL8139State *s)
726 {
727 return s->bChipCmdState & CmdRxEnb;
728 }
729
730 static int rtl8139_transmitter_enabled(RTL8139State *s)
731 {
732 return s->bChipCmdState & CmdTxEnb;
733 }
734
735 static int rtl8139_cp_receiver_enabled(RTL8139State *s)
736 {
737 return s->CpCmd & CPlusRxEnb;
738 }
739
740 static int rtl8139_cp_transmitter_enabled(RTL8139State *s)
741 {
742 return s->CpCmd & CPlusTxEnb;
743 }
744
745 static void rtl8139_write_buffer(RTL8139State *s, const void *buf, int size)
746 {
747 PCIDevice *d = PCI_DEVICE(s);
748
749 if (s->RxBufAddr + size > s->RxBufferSize)
750 {
751 int wrapped = MOD2(s->RxBufAddr + size, s->RxBufferSize);
752
753 /* write packet data */
754 if (wrapped && !(s->RxBufferSize < 65536 && rtl8139_RxWrap(s)))
755 {
756 DPRINTF(">>> rx packet wrapped in buffer at %d\n", size - wrapped);
757
758 if (size > wrapped)
759 {
760 pci_dma_write(d, s->RxBuf + s->RxBufAddr,
761 buf, size-wrapped);
762 }
763
764 /* reset buffer pointer */
765 s->RxBufAddr = 0;
766
767 pci_dma_write(d, s->RxBuf + s->RxBufAddr,
768 buf + (size-wrapped), wrapped);
769
770 s->RxBufAddr = wrapped;
771
772 return;
773 }
774 }
775
776 /* non-wrapping path or overwrapping enabled */
777 pci_dma_write(d, s->RxBuf + s->RxBufAddr, buf, size);
778
779 s->RxBufAddr += size;
780 }
781
782 #define MIN_BUF_SIZE 60
783 static inline dma_addr_t rtl8139_addr64(uint32_t low, uint32_t high)
784 {
785 return low | ((uint64_t)high << 32);
786 }
787
788 /* Workaround for buggy guest driver such as linux who allocates rx
789 * rings after the receiver were enabled. */
790 static bool rtl8139_cp_rx_valid(RTL8139State *s)
791 {
792 return !(s->RxRingAddrLO == 0 && s->RxRingAddrHI == 0);
793 }
794
795 static int rtl8139_can_receive(NetClientState *nc)
796 {
797 RTL8139State *s = qemu_get_nic_opaque(nc);
798 int avail;
799
800 /* Receive (drop) packets if card is disabled. */
801 if (!s->clock_enabled)
802 return 1;
803 if (!rtl8139_receiver_enabled(s))
804 return 1;
805
806 if (rtl8139_cp_receiver_enabled(s) && rtl8139_cp_rx_valid(s)) {
807 /* ??? Flow control not implemented in c+ mode.
808 This is a hack to work around slirp deficiencies anyway. */
809 return 1;
810 } else {
811 avail = MOD2(s->RxBufferSize + s->RxBufPtr - s->RxBufAddr,
812 s->RxBufferSize);
813 return (avail == 0 || avail >= 1514 || (s->IntrMask & RxOverflow));
814 }
815 }
816
817 static ssize_t rtl8139_do_receive(NetClientState *nc, const uint8_t *buf, size_t size_, int do_interrupt)
818 {
819 RTL8139State *s = qemu_get_nic_opaque(nc);
820 PCIDevice *d = PCI_DEVICE(s);
821 /* size is the length of the buffer passed to the driver */
822 int size = size_;
823 const uint8_t *dot1q_buf = NULL;
824
825 uint32_t packet_header = 0;
826
827 uint8_t buf1[MIN_BUF_SIZE + VLAN_HLEN];
828 static const uint8_t broadcast_macaddr[6] =
829 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
830
831 DPRINTF(">>> received len=%d\n", size);
832
833 /* test if board clock is stopped */
834 if (!s->clock_enabled)
835 {
836 DPRINTF("stopped ==========================\n");
837 return -1;
838 }
839
840 /* first check if receiver is enabled */
841
842 if (!rtl8139_receiver_enabled(s))
843 {
844 DPRINTF("receiver disabled ================\n");
845 return -1;
846 }
847
848 /* XXX: check this */
849 if (s->RxConfig & AcceptAllPhys) {
850 /* promiscuous: receive all */
851 DPRINTF(">>> packet received in promiscuous mode\n");
852
853 } else {
854 if (!memcmp(buf, broadcast_macaddr, 6)) {
855 /* broadcast address */
856 if (!(s->RxConfig & AcceptBroadcast))
857 {
858 DPRINTF(">>> broadcast packet rejected\n");
859
860 /* update tally counter */
861 ++s->tally_counters.RxERR;
862
863 return size;
864 }
865
866 packet_header |= RxBroadcast;
867
868 DPRINTF(">>> broadcast packet received\n");
869
870 /* update tally counter */
871 ++s->tally_counters.RxOkBrd;
872
873 } else if (buf[0] & 0x01) {
874 /* multicast */
875 if (!(s->RxConfig & AcceptMulticast))
876 {
877 DPRINTF(">>> multicast packet rejected\n");
878
879 /* update tally counter */
880 ++s->tally_counters.RxERR;
881
882 return size;
883 }
884
885 int mcast_idx = compute_mcast_idx(buf);
886
887 if (!(s->mult[mcast_idx >> 3] & (1 << (mcast_idx & 7))))
888 {
889 DPRINTF(">>> multicast address mismatch\n");
890
891 /* update tally counter */
892 ++s->tally_counters.RxERR;
893
894 return size;
895 }
896
897 packet_header |= RxMulticast;
898
899 DPRINTF(">>> multicast packet received\n");
900
901 /* update tally counter */
902 ++s->tally_counters.RxOkMul;
903
904 } else if (s->phys[0] == buf[0] &&
905 s->phys[1] == buf[1] &&
906 s->phys[2] == buf[2] &&
907 s->phys[3] == buf[3] &&
908 s->phys[4] == buf[4] &&
909 s->phys[5] == buf[5]) {
910 /* match */
911 if (!(s->RxConfig & AcceptMyPhys))
912 {
913 DPRINTF(">>> rejecting physical address matching packet\n");
914
915 /* update tally counter */
916 ++s->tally_counters.RxERR;
917
918 return size;
919 }
920
921 packet_header |= RxPhysical;
922
923 DPRINTF(">>> physical address matching packet received\n");
924
925 /* update tally counter */
926 ++s->tally_counters.RxOkPhy;
927
928 } else {
929
930 DPRINTF(">>> unknown packet\n");
931
932 /* update tally counter */
933 ++s->tally_counters.RxERR;
934
935 return size;
936 }
937 }
938
939 /* if too small buffer, then expand it
940 * Include some tailroom in case a vlan tag is later removed. */
941 if (size < MIN_BUF_SIZE + VLAN_HLEN) {
942 memcpy(buf1, buf, size);
943 memset(buf1 + size, 0, MIN_BUF_SIZE + VLAN_HLEN - size);
944 buf = buf1;
945 if (size < MIN_BUF_SIZE) {
946 size = MIN_BUF_SIZE;
947 }
948 }
949
950 if (rtl8139_cp_receiver_enabled(s))
951 {
952 if (!rtl8139_cp_rx_valid(s)) {
953 return size;
954 }
955
956 DPRINTF("in C+ Rx mode ================\n");
957
958 /* begin C+ receiver mode */
959
960 /* w0 ownership flag */
961 #define CP_RX_OWN (1<<31)
962 /* w0 end of ring flag */
963 #define CP_RX_EOR (1<<30)
964 /* w0 bits 0...12 : buffer size */
965 #define CP_RX_BUFFER_SIZE_MASK ((1<<13) - 1)
966 /* w1 tag available flag */
967 #define CP_RX_TAVA (1<<16)
968 /* w1 bits 0...15 : VLAN tag */
969 #define CP_RX_VLAN_TAG_MASK ((1<<16) - 1)
970 /* w2 low 32bit of Rx buffer ptr */
971 /* w3 high 32bit of Rx buffer ptr */
972
973 int descriptor = s->currCPlusRxDesc;
974 dma_addr_t cplus_rx_ring_desc;
975
976 cplus_rx_ring_desc = rtl8139_addr64(s->RxRingAddrLO, s->RxRingAddrHI);
977 cplus_rx_ring_desc += 16 * descriptor;
978
979 DPRINTF("+++ C+ mode reading RX descriptor %d from host memory at "
980 "%08x %08x = "DMA_ADDR_FMT"\n", descriptor, s->RxRingAddrHI,
981 s->RxRingAddrLO, cplus_rx_ring_desc);
982
983 uint32_t val, rxdw0,rxdw1,rxbufLO,rxbufHI;
984
985 pci_dma_read(d, cplus_rx_ring_desc, &val, 4);
986 rxdw0 = le32_to_cpu(val);
987 pci_dma_read(d, cplus_rx_ring_desc+4, &val, 4);
988 rxdw1 = le32_to_cpu(val);
989 pci_dma_read(d, cplus_rx_ring_desc+8, &val, 4);
990 rxbufLO = le32_to_cpu(val);
991 pci_dma_read(d, cplus_rx_ring_desc+12, &val, 4);
992 rxbufHI = le32_to_cpu(val);
993
994 DPRINTF("+++ C+ mode RX descriptor %d %08x %08x %08x %08x\n",
995 descriptor, rxdw0, rxdw1, rxbufLO, rxbufHI);
996
997 if (!(rxdw0 & CP_RX_OWN))
998 {
999 DPRINTF("C+ Rx mode : descriptor %d is owned by host\n",
1000 descriptor);
1001
1002 s->IntrStatus |= RxOverflow;
1003 ++s->RxMissed;
1004
1005 /* update tally counter */
1006 ++s->tally_counters.RxERR;
1007 ++s->tally_counters.MissPkt;
1008
1009 rtl8139_update_irq(s);
1010 return size_;
1011 }
1012
1013 uint32_t rx_space = rxdw0 & CP_RX_BUFFER_SIZE_MASK;
1014
1015 /* write VLAN info to descriptor variables. */
1016 if (s->CpCmd & CPlusRxVLAN && be16_to_cpup((uint16_t *)
1017 &buf[ETH_ALEN * 2]) == ETH_P_VLAN) {
1018 dot1q_buf = &buf[ETH_ALEN * 2];
1019 size -= VLAN_HLEN;
1020 /* if too small buffer, use the tailroom added duing expansion */
1021 if (size < MIN_BUF_SIZE) {
1022 size = MIN_BUF_SIZE;
1023 }
1024
1025 rxdw1 &= ~CP_RX_VLAN_TAG_MASK;
1026 /* BE + ~le_to_cpu()~ + cpu_to_le() = BE */
1027 rxdw1 |= CP_RX_TAVA | le16_to_cpup((uint16_t *)
1028 &dot1q_buf[ETHER_TYPE_LEN]);
1029
1030 DPRINTF("C+ Rx mode : extracted vlan tag with tci: ""%u\n",
1031 be16_to_cpup((uint16_t *)&dot1q_buf[ETHER_TYPE_LEN]));
1032 } else {
1033 /* reset VLAN tag flag */
1034 rxdw1 &= ~CP_RX_TAVA;
1035 }
1036
1037 /* TODO: scatter the packet over available receive ring descriptors space */
1038
1039 if (size+4 > rx_space)
1040 {
1041 DPRINTF("C+ Rx mode : descriptor %d size %d received %d + 4\n",
1042 descriptor, rx_space, size);
1043
1044 s->IntrStatus |= RxOverflow;
1045 ++s->RxMissed;
1046
1047 /* update tally counter */
1048 ++s->tally_counters.RxERR;
1049 ++s->tally_counters.MissPkt;
1050
1051 rtl8139_update_irq(s);
1052 return size_;
1053 }
1054
1055 dma_addr_t rx_addr = rtl8139_addr64(rxbufLO, rxbufHI);
1056
1057 /* receive/copy to target memory */
1058 if (dot1q_buf) {
1059 pci_dma_write(d, rx_addr, buf, 2 * ETH_ALEN);
1060 pci_dma_write(d, rx_addr + 2 * ETH_ALEN,
1061 buf + 2 * ETH_ALEN + VLAN_HLEN,
1062 size - 2 * ETH_ALEN);
1063 } else {
1064 pci_dma_write(d, rx_addr, buf, size);
1065 }
1066
1067 if (s->CpCmd & CPlusRxChkSum)
1068 {
1069 /* do some packet checksumming */
1070 }
1071
1072 /* write checksum */
1073 val = cpu_to_le32(crc32(0, buf, size_));
1074 pci_dma_write(d, rx_addr+size, (uint8_t *)&val, 4);
1075
1076 /* first segment of received packet flag */
1077 #define CP_RX_STATUS_FS (1<<29)
1078 /* last segment of received packet flag */
1079 #define CP_RX_STATUS_LS (1<<28)
1080 /* multicast packet flag */
1081 #define CP_RX_STATUS_MAR (1<<26)
1082 /* physical-matching packet flag */
1083 #define CP_RX_STATUS_PAM (1<<25)
1084 /* broadcast packet flag */
1085 #define CP_RX_STATUS_BAR (1<<24)
1086 /* runt packet flag */
1087 #define CP_RX_STATUS_RUNT (1<<19)
1088 /* crc error flag */
1089 #define CP_RX_STATUS_CRC (1<<18)
1090 /* IP checksum error flag */
1091 #define CP_RX_STATUS_IPF (1<<15)
1092 /* UDP checksum error flag */
1093 #define CP_RX_STATUS_UDPF (1<<14)
1094 /* TCP checksum error flag */
1095 #define CP_RX_STATUS_TCPF (1<<13)
1096
1097 /* transfer ownership to target */
1098 rxdw0 &= ~CP_RX_OWN;
1099
1100 /* set first segment bit */
1101 rxdw0 |= CP_RX_STATUS_FS;
1102
1103 /* set last segment bit */
1104 rxdw0 |= CP_RX_STATUS_LS;
1105
1106 /* set received packet type flags */
1107 if (packet_header & RxBroadcast)
1108 rxdw0 |= CP_RX_STATUS_BAR;
1109 if (packet_header & RxMulticast)
1110 rxdw0 |= CP_RX_STATUS_MAR;
1111 if (packet_header & RxPhysical)
1112 rxdw0 |= CP_RX_STATUS_PAM;
1113
1114 /* set received size */
1115 rxdw0 &= ~CP_RX_BUFFER_SIZE_MASK;
1116 rxdw0 |= (size+4);
1117
1118 /* update ring data */
1119 val = cpu_to_le32(rxdw0);
1120 pci_dma_write(d, cplus_rx_ring_desc, (uint8_t *)&val, 4);
1121 val = cpu_to_le32(rxdw1);
1122 pci_dma_write(d, cplus_rx_ring_desc+4, (uint8_t *)&val, 4);
1123
1124 /* update tally counter */
1125 ++s->tally_counters.RxOk;
1126
1127 /* seek to next Rx descriptor */
1128 if (rxdw0 & CP_RX_EOR)
1129 {
1130 s->currCPlusRxDesc = 0;
1131 }
1132 else
1133 {
1134 ++s->currCPlusRxDesc;
1135 }
1136
1137 DPRINTF("done C+ Rx mode ----------------\n");
1138
1139 }
1140 else
1141 {
1142 DPRINTF("in ring Rx mode ================\n");
1143
1144 /* begin ring receiver mode */
1145 int avail = MOD2(s->RxBufferSize + s->RxBufPtr - s->RxBufAddr, s->RxBufferSize);
1146
1147 /* if receiver buffer is empty then avail == 0 */
1148
1149 #define RX_ALIGN(x) (((x) + 3) & ~0x3)
1150
1151 if (avail != 0 && RX_ALIGN(size + 8) >= avail)
1152 {
1153 DPRINTF("rx overflow: rx buffer length %d head 0x%04x "
1154 "read 0x%04x === available 0x%04x need 0x%04x\n",
1155 s->RxBufferSize, s->RxBufAddr, s->RxBufPtr, avail, size + 8);
1156
1157 s->IntrStatus |= RxOverflow;
1158 ++s->RxMissed;
1159 rtl8139_update_irq(s);
1160 return size_;
1161 }
1162
1163 packet_header |= RxStatusOK;
1164
1165 packet_header |= (((size+4) << 16) & 0xffff0000);
1166
1167 /* write header */
1168 uint32_t val = cpu_to_le32(packet_header);
1169
1170 rtl8139_write_buffer(s, (uint8_t *)&val, 4);
1171
1172 rtl8139_write_buffer(s, buf, size);
1173
1174 /* write checksum */
1175 val = cpu_to_le32(crc32(0, buf, size));
1176 rtl8139_write_buffer(s, (uint8_t *)&val, 4);
1177
1178 /* correct buffer write pointer */
1179 s->RxBufAddr = MOD2(RX_ALIGN(s->RxBufAddr), s->RxBufferSize);
1180
1181 /* now we can signal we have received something */
1182
1183 DPRINTF("received: rx buffer length %d head 0x%04x read 0x%04x\n",
1184 s->RxBufferSize, s->RxBufAddr, s->RxBufPtr);
1185 }
1186
1187 s->IntrStatus |= RxOK;
1188
1189 if (do_interrupt)
1190 {
1191 rtl8139_update_irq(s);
1192 }
1193
1194 return size_;
1195 }
1196
1197 static ssize_t rtl8139_receive(NetClientState *nc, const uint8_t *buf, size_t size)
1198 {
1199 return rtl8139_do_receive(nc, buf, size, 1);
1200 }
1201
1202 static void rtl8139_reset_rxring(RTL8139State *s, uint32_t bufferSize)
1203 {
1204 s->RxBufferSize = bufferSize;
1205 s->RxBufPtr = 0;
1206 s->RxBufAddr = 0;
1207 }
1208
1209 static void rtl8139_reset(DeviceState *d)
1210 {
1211 RTL8139State *s = RTL8139(d);
1212 int i;
1213
1214 /* restore MAC address */
1215 memcpy(s->phys, s->conf.macaddr.a, 6);
1216 qemu_format_nic_info_str(qemu_get_queue(s->nic), s->phys);
1217
1218 /* reset interrupt mask */
1219 s->IntrStatus = 0;
1220 s->IntrMask = 0;
1221
1222 rtl8139_update_irq(s);
1223
1224 /* mark all status registers as owned by host */
1225 for (i = 0; i < 4; ++i)
1226 {
1227 s->TxStatus[i] = TxHostOwns;
1228 }
1229
1230 s->currTxDesc = 0;
1231 s->currCPlusRxDesc = 0;
1232 s->currCPlusTxDesc = 0;
1233
1234 s->RxRingAddrLO = 0;
1235 s->RxRingAddrHI = 0;
1236
1237 s->RxBuf = 0;
1238
1239 rtl8139_reset_rxring(s, 8192);
1240
1241 /* ACK the reset */
1242 s->TxConfig = 0;
1243
1244 #if 0
1245 // s->TxConfig |= HW_REVID(1, 0, 0, 0, 0, 0, 0); // RTL-8139 HasHltClk
1246 s->clock_enabled = 0;
1247 #else
1248 s->TxConfig |= HW_REVID(1, 1, 1, 0, 1, 1, 0); // RTL-8139C+ HasLWake
1249 s->clock_enabled = 1;
1250 #endif
1251
1252 s->bChipCmdState = CmdReset; /* RxBufEmpty bit is calculated on read from ChipCmd */;
1253
1254 /* set initial state data */
1255 s->Config0 = 0x0; /* No boot ROM */
1256 s->Config1 = 0xC; /* IO mapped and MEM mapped registers available */
1257 s->Config3 = 0x1; /* fast back-to-back compatible */
1258 s->Config5 = 0x0;
1259
1260 s->CSCR = CSCR_F_LINK_100 | CSCR_HEART_BIT | CSCR_LD;
1261
1262 s->CpCmd = 0x0; /* reset C+ mode */
1263 s->cplus_enabled = 0;
1264
1265
1266 // s->BasicModeCtrl = 0x3100; // 100Mbps, full duplex, autonegotiation
1267 // s->BasicModeCtrl = 0x2100; // 100Mbps, full duplex
1268 s->BasicModeCtrl = 0x1000; // autonegotiation
1269
1270 s->BasicModeStatus = 0x7809;
1271 //s->BasicModeStatus |= 0x0040; /* UTP medium */
1272 s->BasicModeStatus |= 0x0020; /* autonegotiation completed */
1273 /* preserve link state */
1274 s->BasicModeStatus |= qemu_get_queue(s->nic)->link_down ? 0 : 0x04;
1275
1276 s->NWayAdvert = 0x05e1; /* all modes, full duplex */
1277 s->NWayLPAR = 0x05e1; /* all modes, full duplex */
1278 s->NWayExpansion = 0x0001; /* autonegotiation supported */
1279
1280 /* also reset timer and disable timer interrupt */
1281 s->TCTR = 0;
1282 s->TimerInt = 0;
1283 s->TCTR_base = 0;
1284 rtl8139_set_next_tctr_time(s);
1285
1286 /* reset tally counters */
1287 RTL8139TallyCounters_clear(&s->tally_counters);
1288 }
1289
1290 static void RTL8139TallyCounters_clear(RTL8139TallyCounters* counters)
1291 {
1292 counters->TxOk = 0;
1293 counters->RxOk = 0;
1294 counters->TxERR = 0;
1295 counters->RxERR = 0;
1296 counters->MissPkt = 0;
1297 counters->FAE = 0;
1298 counters->Tx1Col = 0;
1299 counters->TxMCol = 0;
1300 counters->RxOkPhy = 0;
1301 counters->RxOkBrd = 0;
1302 counters->RxOkMul = 0;
1303 counters->TxAbt = 0;
1304 counters->TxUndrn = 0;
1305 }
1306
1307 static void RTL8139TallyCounters_dma_write(RTL8139State *s, dma_addr_t tc_addr)
1308 {
1309 PCIDevice *d = PCI_DEVICE(s);
1310 RTL8139TallyCounters *tally_counters = &s->tally_counters;
1311 uint16_t val16;
1312 uint32_t val32;
1313 uint64_t val64;
1314
1315 val64 = cpu_to_le64(tally_counters->TxOk);
1316 pci_dma_write(d, tc_addr + 0, (uint8_t *)&val64, 8);
1317
1318 val64 = cpu_to_le64(tally_counters->RxOk);
1319 pci_dma_write(d, tc_addr + 8, (uint8_t *)&val64, 8);
1320
1321 val64 = cpu_to_le64(tally_counters->TxERR);
1322 pci_dma_write(d, tc_addr + 16, (uint8_t *)&val64, 8);
1323
1324 val32 = cpu_to_le32(tally_counters->RxERR);
1325 pci_dma_write(d, tc_addr + 24, (uint8_t *)&val32, 4);
1326
1327 val16 = cpu_to_le16(tally_counters->MissPkt);
1328 pci_dma_write(d, tc_addr + 28, (uint8_t *)&val16, 2);
1329
1330 val16 = cpu_to_le16(tally_counters->FAE);
1331 pci_dma_write(d, tc_addr + 30, (uint8_t *)&val16, 2);
1332
1333 val32 = cpu_to_le32(tally_counters->Tx1Col);
1334 pci_dma_write(d, tc_addr + 32, (uint8_t *)&val32, 4);
1335
1336 val32 = cpu_to_le32(tally_counters->TxMCol);
1337 pci_dma_write(d, tc_addr + 36, (uint8_t *)&val32, 4);
1338
1339 val64 = cpu_to_le64(tally_counters->RxOkPhy);
1340 pci_dma_write(d, tc_addr + 40, (uint8_t *)&val64, 8);
1341
1342 val64 = cpu_to_le64(tally_counters->RxOkBrd);
1343 pci_dma_write(d, tc_addr + 48, (uint8_t *)&val64, 8);
1344
1345 val32 = cpu_to_le32(tally_counters->RxOkMul);
1346 pci_dma_write(d, tc_addr + 56, (uint8_t *)&val32, 4);
1347
1348 val16 = cpu_to_le16(tally_counters->TxAbt);
1349 pci_dma_write(d, tc_addr + 60, (uint8_t *)&val16, 2);
1350
1351 val16 = cpu_to_le16(tally_counters->TxUndrn);
1352 pci_dma_write(d, tc_addr + 62, (uint8_t *)&val16, 2);
1353 }
1354
1355 /* Loads values of tally counters from VM state file */
1356
1357 static const VMStateDescription vmstate_tally_counters = {
1358 .name = "tally_counters",
1359 .version_id = 1,
1360 .minimum_version_id = 1,
1361 .fields = (VMStateField[]) {
1362 VMSTATE_UINT64(TxOk, RTL8139TallyCounters),
1363 VMSTATE_UINT64(RxOk, RTL8139TallyCounters),
1364 VMSTATE_UINT64(TxERR, RTL8139TallyCounters),
1365 VMSTATE_UINT32(RxERR, RTL8139TallyCounters),
1366 VMSTATE_UINT16(MissPkt, RTL8139TallyCounters),
1367 VMSTATE_UINT16(FAE, RTL8139TallyCounters),
1368 VMSTATE_UINT32(Tx1Col, RTL8139TallyCounters),
1369 VMSTATE_UINT32(TxMCol, RTL8139TallyCounters),
1370 VMSTATE_UINT64(RxOkPhy, RTL8139TallyCounters),
1371 VMSTATE_UINT64(RxOkBrd, RTL8139TallyCounters),
1372 VMSTATE_UINT16(TxAbt, RTL8139TallyCounters),
1373 VMSTATE_UINT16(TxUndrn, RTL8139TallyCounters),
1374 VMSTATE_END_OF_LIST()
1375 }
1376 };
1377
1378 static void rtl8139_ChipCmd_write(RTL8139State *s, uint32_t val)
1379 {
1380 DeviceState *d = DEVICE(s);
1381
1382 val &= 0xff;
1383
1384 DPRINTF("ChipCmd write val=0x%08x\n", val);
1385
1386 if (val & CmdReset)
1387 {
1388 DPRINTF("ChipCmd reset\n");
1389 rtl8139_reset(d);
1390 }
1391 if (val & CmdRxEnb)
1392 {
1393 DPRINTF("ChipCmd enable receiver\n");
1394
1395 s->currCPlusRxDesc = 0;
1396 }
1397 if (val & CmdTxEnb)
1398 {
1399 DPRINTF("ChipCmd enable transmitter\n");
1400
1401 s->currCPlusTxDesc = 0;
1402 }
1403
1404 /* mask unwritable bits */
1405 val = SET_MASKED(val, 0xe3, s->bChipCmdState);
1406
1407 /* Deassert reset pin before next read */
1408 val &= ~CmdReset;
1409
1410 s->bChipCmdState = val;
1411 }
1412
1413 static int rtl8139_RxBufferEmpty(RTL8139State *s)
1414 {
1415 int unread = MOD2(s->RxBufferSize + s->RxBufAddr - s->RxBufPtr, s->RxBufferSize);
1416
1417 if (unread != 0)
1418 {
1419 DPRINTF("receiver buffer data available 0x%04x\n", unread);
1420 return 0;
1421 }
1422
1423 DPRINTF("receiver buffer is empty\n");
1424
1425 return 1;
1426 }
1427
1428 static uint32_t rtl8139_ChipCmd_read(RTL8139State *s)
1429 {
1430 uint32_t ret = s->bChipCmdState;
1431
1432 if (rtl8139_RxBufferEmpty(s))
1433 ret |= RxBufEmpty;
1434
1435 DPRINTF("ChipCmd read val=0x%04x\n", ret);
1436
1437 return ret;
1438 }
1439
1440 static void rtl8139_CpCmd_write(RTL8139State *s, uint32_t val)
1441 {
1442 val &= 0xffff;
1443
1444 DPRINTF("C+ command register write(w) val=0x%04x\n", val);
1445
1446 s->cplus_enabled = 1;
1447
1448 /* mask unwritable bits */
1449 val = SET_MASKED(val, 0xff84, s->CpCmd);
1450
1451 s->CpCmd = val;
1452 }
1453
1454 static uint32_t rtl8139_CpCmd_read(RTL8139State *s)
1455 {
1456 uint32_t ret = s->CpCmd;
1457
1458 DPRINTF("C+ command register read(w) val=0x%04x\n", ret);
1459
1460 return ret;
1461 }
1462
1463 static void rtl8139_IntrMitigate_write(RTL8139State *s, uint32_t val)
1464 {
1465 DPRINTF("C+ IntrMitigate register write(w) val=0x%04x\n", val);
1466 }
1467
1468 static uint32_t rtl8139_IntrMitigate_read(RTL8139State *s)
1469 {
1470 uint32_t ret = 0;
1471
1472 DPRINTF("C+ IntrMitigate register read(w) val=0x%04x\n", ret);
1473
1474 return ret;
1475 }
1476
1477 static int rtl8139_config_writable(RTL8139State *s)
1478 {
1479 if ((s->Cfg9346 & Chip9346_op_mask) == Cfg9346_ConfigWrite)
1480 {
1481 return 1;
1482 }
1483
1484 DPRINTF("Configuration registers are write-protected\n");
1485
1486 return 0;
1487 }
1488
1489 static void rtl8139_BasicModeCtrl_write(RTL8139State *s, uint32_t val)
1490 {
1491 val &= 0xffff;
1492
1493 DPRINTF("BasicModeCtrl register write(w) val=0x%04x\n", val);
1494
1495 /* mask unwritable bits */
1496 uint32_t mask = 0x4cff;
1497
1498 if (1 || !rtl8139_config_writable(s))
1499 {
1500 /* Speed setting and autonegotiation enable bits are read-only */
1501 mask |= 0x3000;
1502 /* Duplex mode setting is read-only */
1503 mask |= 0x0100;
1504 }
1505
1506 val = SET_MASKED(val, mask, s->BasicModeCtrl);
1507
1508 s->BasicModeCtrl = val;
1509 }
1510
1511 static uint32_t rtl8139_BasicModeCtrl_read(RTL8139State *s)
1512 {
1513 uint32_t ret = s->BasicModeCtrl;
1514
1515 DPRINTF("BasicModeCtrl register read(w) val=0x%04x\n", ret);
1516
1517 return ret;
1518 }
1519
1520 static void rtl8139_BasicModeStatus_write(RTL8139State *s, uint32_t val)
1521 {
1522 val &= 0xffff;
1523
1524 DPRINTF("BasicModeStatus register write(w) val=0x%04x\n", val);
1525
1526 /* mask unwritable bits */
1527 val = SET_MASKED(val, 0xff3f, s->BasicModeStatus);
1528
1529 s->BasicModeStatus = val;
1530 }
1531
1532 static uint32_t rtl8139_BasicModeStatus_read(RTL8139State *s)
1533 {
1534 uint32_t ret = s->BasicModeStatus;
1535
1536 DPRINTF("BasicModeStatus register read(w) val=0x%04x\n", ret);
1537
1538 return ret;
1539 }
1540
1541 static void rtl8139_Cfg9346_write(RTL8139State *s, uint32_t val)
1542 {
1543 DeviceState *d = DEVICE(s);
1544
1545 val &= 0xff;
1546
1547 DPRINTF("Cfg9346 write val=0x%02x\n", val);
1548
1549 /* mask unwritable bits */
1550 val = SET_MASKED(val, 0x31, s->Cfg9346);
1551
1552 uint32_t opmode = val & 0xc0;
1553 uint32_t eeprom_val = val & 0xf;
1554
1555 if (opmode == 0x80) {
1556 /* eeprom access */
1557 int eecs = (eeprom_val & 0x08)?1:0;
1558 int eesk = (eeprom_val & 0x04)?1:0;
1559 int eedi = (eeprom_val & 0x02)?1:0;
1560 prom9346_set_wire(s, eecs, eesk, eedi);
1561 } else if (opmode == 0x40) {
1562 /* Reset. */
1563 val = 0;
1564 rtl8139_reset(d);
1565 }
1566
1567 s->Cfg9346 = val;
1568 }
1569
1570 static uint32_t rtl8139_Cfg9346_read(RTL8139State *s)
1571 {
1572 uint32_t ret = s->Cfg9346;
1573
1574 uint32_t opmode = ret & 0xc0;
1575
1576 if (opmode == 0x80)
1577 {
1578 /* eeprom access */
1579 int eedo = prom9346_get_wire(s);
1580 if (eedo)
1581 {
1582 ret |= 0x01;
1583 }
1584 else
1585 {
1586 ret &= ~0x01;
1587 }
1588 }
1589
1590 DPRINTF("Cfg9346 read val=0x%02x\n", ret);
1591
1592 return ret;
1593 }
1594
1595 static void rtl8139_Config0_write(RTL8139State *s, uint32_t val)
1596 {
1597 val &= 0xff;
1598
1599 DPRINTF("Config0 write val=0x%02x\n", val);
1600
1601 if (!rtl8139_config_writable(s)) {
1602 return;
1603 }
1604
1605 /* mask unwritable bits */
1606 val = SET_MASKED(val, 0xf8, s->Config0);
1607
1608 s->Config0 = val;
1609 }
1610
1611 static uint32_t rtl8139_Config0_read(RTL8139State *s)
1612 {
1613 uint32_t ret = s->Config0;
1614
1615 DPRINTF("Config0 read val=0x%02x\n", ret);
1616
1617 return ret;
1618 }
1619
1620 static void rtl8139_Config1_write(RTL8139State *s, uint32_t val)
1621 {
1622 val &= 0xff;
1623
1624 DPRINTF("Config1 write val=0x%02x\n", val);
1625
1626 if (!rtl8139_config_writable(s)) {
1627 return;
1628 }
1629
1630 /* mask unwritable bits */
1631 val = SET_MASKED(val, 0xC, s->Config1);
1632
1633 s->Config1 = val;
1634 }
1635
1636 static uint32_t rtl8139_Config1_read(RTL8139State *s)
1637 {
1638 uint32_t ret = s->Config1;
1639
1640 DPRINTF("Config1 read val=0x%02x\n", ret);
1641
1642 return ret;
1643 }
1644
1645 static void rtl8139_Config3_write(RTL8139State *s, uint32_t val)
1646 {
1647 val &= 0xff;
1648
1649 DPRINTF("Config3 write val=0x%02x\n", val);
1650
1651 if (!rtl8139_config_writable(s)) {
1652 return;
1653 }
1654
1655 /* mask unwritable bits */
1656 val = SET_MASKED(val, 0x8F, s->Config3);
1657
1658 s->Config3 = val;
1659 }
1660
1661 static uint32_t rtl8139_Config3_read(RTL8139State *s)
1662 {
1663 uint32_t ret = s->Config3;
1664
1665 DPRINTF("Config3 read val=0x%02x\n", ret);
1666
1667 return ret;
1668 }
1669
1670 static void rtl8139_Config4_write(RTL8139State *s, uint32_t val)
1671 {
1672 val &= 0xff;
1673
1674 DPRINTF("Config4 write val=0x%02x\n", val);
1675
1676 if (!rtl8139_config_writable(s)) {
1677 return;
1678 }
1679
1680 /* mask unwritable bits */
1681 val = SET_MASKED(val, 0x0a, s->Config4);
1682
1683 s->Config4 = val;
1684 }
1685
1686 static uint32_t rtl8139_Config4_read(RTL8139State *s)
1687 {
1688 uint32_t ret = s->Config4;
1689
1690 DPRINTF("Config4 read val=0x%02x\n", ret);
1691
1692 return ret;
1693 }
1694
1695 static void rtl8139_Config5_write(RTL8139State *s, uint32_t val)
1696 {
1697 val &= 0xff;
1698
1699 DPRINTF("Config5 write val=0x%02x\n", val);
1700
1701 /* mask unwritable bits */
1702 val = SET_MASKED(val, 0x80, s->Config5);
1703
1704 s->Config5 = val;
1705 }
1706
1707 static uint32_t rtl8139_Config5_read(RTL8139State *s)
1708 {
1709 uint32_t ret = s->Config5;
1710
1711 DPRINTF("Config5 read val=0x%02x\n", ret);
1712
1713 return ret;
1714 }
1715
1716 static void rtl8139_TxConfig_write(RTL8139State *s, uint32_t val)
1717 {
1718 if (!rtl8139_transmitter_enabled(s))
1719 {
1720 DPRINTF("transmitter disabled; no TxConfig write val=0x%08x\n", val);
1721 return;
1722 }
1723
1724 DPRINTF("TxConfig write val=0x%08x\n", val);
1725
1726 val = SET_MASKED(val, TxVersionMask | 0x8070f80f, s->TxConfig);
1727
1728 s->TxConfig = val;
1729 }
1730
1731 static void rtl8139_TxConfig_writeb(RTL8139State *s, uint32_t val)
1732 {
1733 DPRINTF("RTL8139C TxConfig via write(b) val=0x%02x\n", val);
1734
1735 uint32_t tc = s->TxConfig;
1736 tc &= 0xFFFFFF00;
1737 tc |= (val & 0x000000FF);
1738 rtl8139_TxConfig_write(s, tc);
1739 }
1740
1741 static uint32_t rtl8139_TxConfig_read(RTL8139State *s)
1742 {
1743 uint32_t ret = s->TxConfig;
1744
1745 DPRINTF("TxConfig read val=0x%04x\n", ret);
1746
1747 return ret;
1748 }
1749
1750 static void rtl8139_RxConfig_write(RTL8139State *s, uint32_t val)
1751 {
1752 DPRINTF("RxConfig write val=0x%08x\n", val);
1753
1754 /* mask unwritable bits */
1755 val = SET_MASKED(val, 0xf0fc0040, s->RxConfig);
1756
1757 s->RxConfig = val;
1758
1759 /* reset buffer size and read/write pointers */
1760 rtl8139_reset_rxring(s, 8192 << ((s->RxConfig >> 11) & 0x3));
1761
1762 DPRINTF("RxConfig write reset buffer size to %d\n", s->RxBufferSize);
1763 }
1764
1765 static uint32_t rtl8139_RxConfig_read(RTL8139State *s)
1766 {
1767 uint32_t ret = s->RxConfig;
1768
1769 DPRINTF("RxConfig read val=0x%08x\n", ret);
1770
1771 return ret;
1772 }
1773
1774 static void rtl8139_transfer_frame(RTL8139State *s, uint8_t *buf, int size,
1775 int do_interrupt, const uint8_t *dot1q_buf)
1776 {
1777 struct iovec *iov = NULL;
1778 struct iovec vlan_iov[3];
1779
1780 if (!size)
1781 {
1782 DPRINTF("+++ empty ethernet frame\n");
1783 return;
1784 }
1785
1786 if (dot1q_buf && size >= ETH_ALEN * 2) {
1787 iov = (struct iovec[3]) {
1788 { .iov_base = buf, .iov_len = ETH_ALEN * 2 },
1789 { .iov_base = (void *) dot1q_buf, .iov_len = VLAN_HLEN },
1790 { .iov_base = buf + ETH_ALEN * 2,
1791 .iov_len = size - ETH_ALEN * 2 },
1792 };
1793
1794 memcpy(vlan_iov, iov, sizeof(vlan_iov));
1795 iov = vlan_iov;
1796 }
1797
1798 if (TxLoopBack == (s->TxConfig & TxLoopBack))
1799 {
1800 size_t buf2_size;
1801 uint8_t *buf2;
1802
1803 if (iov) {
1804 buf2_size = iov_size(iov, 3);
1805 buf2 = g_malloc(buf2_size);
1806 iov_to_buf(iov, 3, 0, buf2, buf2_size);
1807 buf = buf2;
1808 }
1809
1810 DPRINTF("+++ transmit loopback mode\n");
1811 rtl8139_do_receive(qemu_get_queue(s->nic), buf, size, do_interrupt);
1812
1813 if (iov) {
1814 g_free(buf2);
1815 }
1816 }
1817 else
1818 {
1819 if (iov) {
1820 qemu_sendv_packet(qemu_get_queue(s->nic), iov, 3);
1821 } else {
1822 qemu_send_packet(qemu_get_queue(s->nic), buf, size);
1823 }
1824 }
1825 }
1826
1827 static int rtl8139_transmit_one(RTL8139State *s, int descriptor)
1828 {
1829 if (!rtl8139_transmitter_enabled(s))
1830 {
1831 DPRINTF("+++ cannot transmit from descriptor %d: transmitter "
1832 "disabled\n", descriptor);
1833 return 0;
1834 }
1835
1836 if (s->TxStatus[descriptor] & TxHostOwns)
1837 {
1838 DPRINTF("+++ cannot transmit from descriptor %d: owned by host "
1839 "(%08x)\n", descriptor, s->TxStatus[descriptor]);
1840 return 0;
1841 }
1842
1843 DPRINTF("+++ transmitting from descriptor %d\n", descriptor);
1844
1845 PCIDevice *d = PCI_DEVICE(s);
1846 int txsize = s->TxStatus[descriptor] & 0x1fff;
1847 uint8_t txbuffer[0x2000];
1848
1849 DPRINTF("+++ transmit reading %d bytes from host memory at 0x%08x\n",
1850 txsize, s->TxAddr[descriptor]);
1851
1852 pci_dma_read(d, s->TxAddr[descriptor], txbuffer, txsize);
1853
1854 /* Mark descriptor as transferred */
1855 s->TxStatus[descriptor] |= TxHostOwns;
1856 s->TxStatus[descriptor] |= TxStatOK;
1857
1858 rtl8139_transfer_frame(s, txbuffer, txsize, 0, NULL);
1859
1860 DPRINTF("+++ transmitted %d bytes from descriptor %d\n", txsize,
1861 descriptor);
1862
1863 /* update interrupt */
1864 s->IntrStatus |= TxOK;
1865 rtl8139_update_irq(s);
1866
1867 return 1;
1868 }
1869
1870 /* structures and macros for task offloading */
1871 #define TCP_HEADER_DATA_OFFSET(tcp) (((be16_to_cpu(tcp->th_offset_flags) >> 12)&0xf) << 2)
1872 #define TCP_FLAGS_ONLY(flags) ((flags)&0x3f)
1873 #define TCP_HEADER_FLAGS(tcp) TCP_FLAGS_ONLY(be16_to_cpu(tcp->th_offset_flags))
1874
1875 #define TCP_HEADER_CLEAR_FLAGS(tcp, off) ((tcp)->th_offset_flags &= cpu_to_be16(~TCP_FLAGS_ONLY(off)))
1876
1877 /* produces ones' complement sum of data */
1878 static uint16_t ones_complement_sum(uint8_t *data, size_t len)
1879 {
1880 uint32_t result = 0;
1881
1882 for (; len > 1; data+=2, len-=2)
1883 {
1884 result += *(uint16_t*)data;
1885 }
1886
1887 /* add the remainder byte */
1888 if (len)
1889 {
1890 uint8_t odd[2] = {*data, 0};
1891 result += *(uint16_t*)odd;
1892 }
1893
1894 while (result>>16)
1895 result = (result & 0xffff) + (result >> 16);
1896
1897 return result;
1898 }
1899
1900 static uint16_t ip_checksum(void *data, size_t len)
1901 {
1902 return ~ones_complement_sum((uint8_t*)data, len);
1903 }
1904
1905 static int rtl8139_cplus_transmit_one(RTL8139State *s)
1906 {
1907 if (!rtl8139_transmitter_enabled(s))
1908 {
1909 DPRINTF("+++ C+ mode: transmitter disabled\n");
1910 return 0;
1911 }
1912
1913 if (!rtl8139_cp_transmitter_enabled(s))
1914 {
1915 DPRINTF("+++ C+ mode: C+ transmitter disabled\n");
1916 return 0 ;
1917 }
1918
1919 PCIDevice *d = PCI_DEVICE(s);
1920 int descriptor = s->currCPlusTxDesc;
1921
1922 dma_addr_t cplus_tx_ring_desc = rtl8139_addr64(s->TxAddr[0], s->TxAddr[1]);
1923
1924 /* Normal priority ring */
1925 cplus_tx_ring_desc += 16 * descriptor;
1926
1927 DPRINTF("+++ C+ mode reading TX descriptor %d from host memory at "
1928 "%08x %08x = 0x"DMA_ADDR_FMT"\n", descriptor, s->TxAddr[1],
1929 s->TxAddr[0], cplus_tx_ring_desc);
1930
1931 uint32_t val, txdw0,txdw1,txbufLO,txbufHI;
1932
1933 pci_dma_read(d, cplus_tx_ring_desc, (uint8_t *)&val, 4);
1934 txdw0 = le32_to_cpu(val);
1935 pci_dma_read(d, cplus_tx_ring_desc+4, (uint8_t *)&val, 4);
1936 txdw1 = le32_to_cpu(val);
1937 pci_dma_read(d, cplus_tx_ring_desc+8, (uint8_t *)&val, 4);
1938 txbufLO = le32_to_cpu(val);
1939 pci_dma_read(d, cplus_tx_ring_desc+12, (uint8_t *)&val, 4);
1940 txbufHI = le32_to_cpu(val);
1941
1942 DPRINTF("+++ C+ mode TX descriptor %d %08x %08x %08x %08x\n", descriptor,
1943 txdw0, txdw1, txbufLO, txbufHI);
1944
1945 /* w0 ownership flag */
1946 #define CP_TX_OWN (1<<31)
1947 /* w0 end of ring flag */
1948 #define CP_TX_EOR (1<<30)
1949 /* first segment of received packet flag */
1950 #define CP_TX_FS (1<<29)
1951 /* last segment of received packet flag */
1952 #define CP_TX_LS (1<<28)
1953 /* large send packet flag */
1954 #define CP_TX_LGSEN (1<<27)
1955 /* large send MSS mask, bits 16...25 */
1956 #define CP_TC_LGSEN_MSS_MASK ((1 << 12) - 1)
1957
1958 /* IP checksum offload flag */
1959 #define CP_TX_IPCS (1<<18)
1960 /* UDP checksum offload flag */
1961 #define CP_TX_UDPCS (1<<17)
1962 /* TCP checksum offload flag */
1963 #define CP_TX_TCPCS (1<<16)
1964
1965 /* w0 bits 0...15 : buffer size */
1966 #define CP_TX_BUFFER_SIZE (1<<16)
1967 #define CP_TX_BUFFER_SIZE_MASK (CP_TX_BUFFER_SIZE - 1)
1968 /* w1 add tag flag */
1969 #define CP_TX_TAGC (1<<17)
1970 /* w1 bits 0...15 : VLAN tag (big endian) */
1971 #define CP_TX_VLAN_TAG_MASK ((1<<16) - 1)
1972 /* w2 low 32bit of Rx buffer ptr */
1973 /* w3 high 32bit of Rx buffer ptr */
1974
1975 /* set after transmission */
1976 /* FIFO underrun flag */
1977 #define CP_TX_STATUS_UNF (1<<25)
1978 /* transmit error summary flag, valid if set any of three below */
1979 #define CP_TX_STATUS_TES (1<<23)
1980 /* out-of-window collision flag */
1981 #define CP_TX_STATUS_OWC (1<<22)
1982 /* link failure flag */
1983 #define CP_TX_STATUS_LNKF (1<<21)
1984 /* excessive collisions flag */
1985 #define CP_TX_STATUS_EXC (1<<20)
1986
1987 if (!(txdw0 & CP_TX_OWN))
1988 {
1989 DPRINTF("C+ Tx mode : descriptor %d is owned by host\n", descriptor);
1990 return 0 ;
1991 }
1992
1993 DPRINTF("+++ C+ Tx mode : transmitting from descriptor %d\n", descriptor);
1994
1995 if (txdw0 & CP_TX_FS)
1996 {
1997 DPRINTF("+++ C+ Tx mode : descriptor %d is first segment "
1998 "descriptor\n", descriptor);
1999
2000 /* reset internal buffer offset */
2001 s->cplus_txbuffer_offset = 0;
2002 }
2003
2004 int txsize = txdw0 & CP_TX_BUFFER_SIZE_MASK;
2005 dma_addr_t tx_addr = rtl8139_addr64(txbufLO, txbufHI);
2006
2007 /* make sure we have enough space to assemble the packet */
2008 if (!s->cplus_txbuffer)
2009 {
2010 s->cplus_txbuffer_len = CP_TX_BUFFER_SIZE;
2011 s->cplus_txbuffer = g_malloc(s->cplus_txbuffer_len);
2012 s->cplus_txbuffer_offset = 0;
2013
2014 DPRINTF("+++ C+ mode transmission buffer allocated space %d\n",
2015 s->cplus_txbuffer_len);
2016 }
2017
2018 if (s->cplus_txbuffer_offset + txsize >= s->cplus_txbuffer_len)
2019 {
2020 /* The spec didn't tell the maximum size, stick to CP_TX_BUFFER_SIZE */
2021 txsize = s->cplus_txbuffer_len - s->cplus_txbuffer_offset;
2022 DPRINTF("+++ C+ mode transmission buffer overrun, truncated descriptor"
2023 "length to %d\n", txsize);
2024 }
2025
2026 /* append more data to the packet */
2027
2028 DPRINTF("+++ C+ mode transmit reading %d bytes from host memory at "
2029 DMA_ADDR_FMT" to offset %d\n", txsize, tx_addr,
2030 s->cplus_txbuffer_offset);
2031
2032 pci_dma_read(d, tx_addr,
2033 s->cplus_txbuffer + s->cplus_txbuffer_offset, txsize);
2034 s->cplus_txbuffer_offset += txsize;
2035
2036 /* seek to next Rx descriptor */
2037 if (txdw0 & CP_TX_EOR)
2038 {
2039 s->currCPlusTxDesc = 0;
2040 }
2041 else
2042 {
2043 ++s->currCPlusTxDesc;
2044 if (s->currCPlusTxDesc >= 64)
2045 s->currCPlusTxDesc = 0;
2046 }
2047
2048 /* transfer ownership to target */
2049 txdw0 &= ~CP_RX_OWN;
2050
2051 /* reset error indicator bits */
2052 txdw0 &= ~CP_TX_STATUS_UNF;
2053 txdw0 &= ~CP_TX_STATUS_TES;
2054 txdw0 &= ~CP_TX_STATUS_OWC;
2055 txdw0 &= ~CP_TX_STATUS_LNKF;
2056 txdw0 &= ~CP_TX_STATUS_EXC;
2057
2058 /* update ring data */
2059 val = cpu_to_le32(txdw0);
2060 pci_dma_write(d, cplus_tx_ring_desc, (uint8_t *)&val, 4);
2061
2062 /* Now decide if descriptor being processed is holding the last segment of packet */
2063 if (txdw0 & CP_TX_LS)
2064 {
2065 uint8_t dot1q_buffer_space[VLAN_HLEN];
2066 uint16_t *dot1q_buffer;
2067
2068 DPRINTF("+++ C+ Tx mode : descriptor %d is last segment descriptor\n",
2069 descriptor);
2070
2071 /* can transfer fully assembled packet */
2072
2073 uint8_t *saved_buffer = s->cplus_txbuffer;
2074 int saved_size = s->cplus_txbuffer_offset;
2075 int saved_buffer_len = s->cplus_txbuffer_len;
2076
2077 /* create vlan tag */
2078 if (txdw1 & CP_TX_TAGC) {
2079 /* the vlan tag is in BE byte order in the descriptor
2080 * BE + le_to_cpu() + ~swap()~ = cpu */
2081 DPRINTF("+++ C+ Tx mode : inserting vlan tag with ""tci: %u\n",
2082 bswap16(txdw1 & CP_TX_VLAN_TAG_MASK));
2083
2084 dot1q_buffer = (uint16_t *) dot1q_buffer_space;
2085 dot1q_buffer[0] = cpu_to_be16(ETH_P_VLAN);
2086 /* BE + le_to_cpu() + ~cpu_to_le()~ = BE */
2087 dot1q_buffer[1] = cpu_to_le16(txdw1 & CP_TX_VLAN_TAG_MASK);
2088 } else {
2089 dot1q_buffer = NULL;
2090 }
2091
2092 /* reset the card space to protect from recursive call */
2093 s->cplus_txbuffer = NULL;
2094 s->cplus_txbuffer_offset = 0;
2095 s->cplus_txbuffer_len = 0;
2096
2097 if (txdw0 & (CP_TX_IPCS | CP_TX_UDPCS | CP_TX_TCPCS | CP_TX_LGSEN))
2098 {
2099 DPRINTF("+++ C+ mode offloaded task checksum\n");
2100
2101 /* Large enough for Ethernet and IP headers? */
2102 if (saved_size < ETH_HLEN + sizeof(struct ip_header)) {
2103 goto skip_offload;
2104 }
2105
2106 /* ip packet header */
2107 struct ip_header *ip = NULL;
2108 int hlen = 0;
2109 uint8_t ip_protocol = 0;
2110 uint16_t ip_data_len = 0;
2111
2112 uint8_t *eth_payload_data = NULL;
2113 size_t eth_payload_len = 0;
2114
2115 int proto = be16_to_cpu(*(uint16_t *)(saved_buffer + 12));
2116 if (proto != ETH_P_IP)
2117 {
2118 goto skip_offload;
2119 }
2120
2121 DPRINTF("+++ C+ mode has IP packet\n");
2122
2123 /* Note on memory alignment: eth_payload_data is 16-bit aligned
2124 * since saved_buffer is allocated with g_malloc() and ETH_HLEN is
2125 * even. 32-bit accesses must use ldl/stl wrappers to avoid
2126 * unaligned accesses.
2127 */
2128 eth_payload_data = saved_buffer + ETH_HLEN;
2129 eth_payload_len = saved_size - ETH_HLEN;
2130
2131 ip = (struct ip_header*)eth_payload_data;
2132
2133 if (IP_HEADER_VERSION(ip) != IP_HEADER_VERSION_4) {
2134 DPRINTF("+++ C+ mode packet has bad IP version %d "
2135 "expected %d\n", IP_HEADER_VERSION(ip),
2136 IP_HEADER_VERSION_4);
2137 goto skip_offload;
2138 }
2139
2140 hlen = IP_HDR_GET_LEN(ip);
2141 if (hlen < sizeof(struct ip_header) || hlen > eth_payload_len) {
2142 goto skip_offload;
2143 }
2144
2145 ip_protocol = ip->ip_p;
2146
2147 ip_data_len = be16_to_cpu(ip->ip_len);
2148 if (ip_data_len < hlen || ip_data_len > eth_payload_len) {
2149 goto skip_offload;
2150 }
2151 ip_data_len -= hlen;
2152
2153 if (txdw0 & CP_TX_IPCS)
2154 {
2155 DPRINTF("+++ C+ mode need IP checksum\n");
2156
2157 ip->ip_sum = 0;
2158 ip->ip_sum = ip_checksum(ip, hlen);
2159 DPRINTF("+++ C+ mode IP header len=%d checksum=%04x\n",
2160 hlen, ip->ip_sum);
2161 }
2162
2163 if ((txdw0 & CP_TX_LGSEN) && ip_protocol == IP_PROTO_TCP)
2164 {
2165 /* Large enough for the TCP header? */
2166 if (ip_data_len < sizeof(tcp_header)) {
2167 goto skip_offload;
2168 }
2169
2170 int large_send_mss = (txdw0 >> 16) & CP_TC_LGSEN_MSS_MASK;
2171
2172 DPRINTF("+++ C+ mode offloaded task TSO MTU=%d IP data %d "
2173 "frame data %d specified MSS=%d\n", ETH_MTU,
2174 ip_data_len, saved_size - ETH_HLEN, large_send_mss);
2175
2176 int tcp_send_offset = 0;
2177 int send_count = 0;
2178
2179 /* maximum IP header length is 60 bytes */
2180 uint8_t saved_ip_header[60];
2181
2182 /* save IP header template; data area is used in tcp checksum calculation */
2183 memcpy(saved_ip_header, eth_payload_data, hlen);
2184
2185 /* a placeholder for checksum calculation routine in tcp case */
2186 uint8_t *data_to_checksum = eth_payload_data + hlen - 12;
2187 // size_t data_to_checksum_len = eth_payload_len - hlen + 12;
2188
2189 /* pointer to TCP header */
2190 tcp_header *p_tcp_hdr = (tcp_header*)(eth_payload_data + hlen);
2191
2192 int tcp_hlen = TCP_HEADER_DATA_OFFSET(p_tcp_hdr);
2193
2194 /* Invalid TCP data offset? */
2195 if (tcp_hlen < sizeof(tcp_header) || tcp_hlen > ip_data_len) {
2196 goto skip_offload;
2197 }
2198
2199 /* ETH_MTU = ip header len + tcp header len + payload */
2200 int tcp_data_len = ip_data_len - tcp_hlen;
2201 int tcp_chunk_size = ETH_MTU - hlen - tcp_hlen;
2202
2203 DPRINTF("+++ C+ mode TSO IP data len %d TCP hlen %d TCP "
2204 "data len %d TCP chunk size %d\n", ip_data_len,
2205 tcp_hlen, tcp_data_len, tcp_chunk_size);
2206
2207 /* note the cycle below overwrites IP header data,
2208 but restores it from saved_ip_header before sending packet */
2209
2210 int is_last_frame = 0;
2211
2212 for (tcp_send_offset = 0; tcp_send_offset < tcp_data_len; tcp_send_offset += tcp_chunk_size)
2213 {
2214 uint16_t chunk_size = tcp_chunk_size;
2215
2216 /* check if this is the last frame */
2217 if (tcp_send_offset + tcp_chunk_size >= tcp_data_len)
2218 {
2219 is_last_frame = 1;
2220 chunk_size = tcp_data_len - tcp_send_offset;
2221 }
2222
2223 DPRINTF("+++ C+ mode TSO TCP seqno %08x\n",
2224 ldl_be_p(&p_tcp_hdr->th_seq));
2225
2226 /* add 4 TCP pseudoheader fields */
2227 /* copy IP source and destination fields */
2228 memcpy(data_to_checksum, saved_ip_header + 12, 8);
2229
2230 DPRINTF("+++ C+ mode TSO calculating TCP checksum for "
2231 "packet with %d bytes data\n", tcp_hlen +
2232 chunk_size);
2233
2234 if (tcp_send_offset)
2235 {
2236 memcpy((uint8_t*)p_tcp_hdr + tcp_hlen, (uint8_t*)p_tcp_hdr + tcp_hlen + tcp_send_offset, chunk_size);
2237 }
2238
2239 /* keep PUSH and FIN flags only for the last frame */
2240 if (!is_last_frame)
2241 {
2242 TCP_HEADER_CLEAR_FLAGS(p_tcp_hdr, TH_PUSH | TH_FIN);
2243 }
2244
2245 /* recalculate TCP checksum */
2246 ip_pseudo_header *p_tcpip_hdr = (ip_pseudo_header *)data_to_checksum;
2247 p_tcpip_hdr->zeros = 0;
2248 p_tcpip_hdr->ip_proto = IP_PROTO_TCP;
2249 p_tcpip_hdr->ip_payload = cpu_to_be16(tcp_hlen + chunk_size);
2250
2251 p_tcp_hdr->th_sum = 0;
2252
2253 int tcp_checksum = ip_checksum(data_to_checksum, tcp_hlen + chunk_size + 12);
2254 DPRINTF("+++ C+ mode TSO TCP checksum %04x\n",
2255 tcp_checksum);
2256
2257 p_tcp_hdr->th_sum = tcp_checksum;
2258
2259 /* restore IP header */
2260 memcpy(eth_payload_data, saved_ip_header, hlen);
2261
2262 /* set IP data length and recalculate IP checksum */
2263 ip->ip_len = cpu_to_be16(hlen + tcp_hlen + chunk_size);
2264
2265 /* increment IP id for subsequent frames */
2266 ip->ip_id = cpu_to_be16(tcp_send_offset/tcp_chunk_size + be16_to_cpu(ip->ip_id));
2267
2268 ip->ip_sum = 0;
2269 ip->ip_sum = ip_checksum(eth_payload_data, hlen);
2270 DPRINTF("+++ C+ mode TSO IP header len=%d "
2271 "checksum=%04x\n", hlen, ip->ip_sum);
2272
2273 int tso_send_size = ETH_HLEN + hlen + tcp_hlen + chunk_size;
2274 DPRINTF("+++ C+ mode TSO transferring packet size "
2275 "%d\n", tso_send_size);
2276 rtl8139_transfer_frame(s, saved_buffer, tso_send_size,
2277 0, (uint8_t *) dot1q_buffer);
2278
2279 /* add transferred count to TCP sequence number */
2280 stl_be_p(&p_tcp_hdr->th_seq,
2281 chunk_size + ldl_be_p(&p_tcp_hdr->th_seq));
2282 ++send_count;
2283 }
2284
2285 /* Stop sending this frame */
2286 saved_size = 0;
2287 }
2288 else if (txdw0 & (CP_TX_TCPCS|CP_TX_UDPCS))
2289 {
2290 DPRINTF("+++ C+ mode need TCP or UDP checksum\n");
2291
2292 /* maximum IP header length is 60 bytes */
2293 uint8_t saved_ip_header[60];
2294 memcpy(saved_ip_header, eth_payload_data, hlen);
2295
2296 uint8_t *data_to_checksum = eth_payload_data + hlen - 12;
2297 // size_t data_to_checksum_len = eth_payload_len - hlen + 12;
2298
2299 /* add 4 TCP pseudoheader fields */
2300 /* copy IP source and destination fields */
2301 memcpy(data_to_checksum, saved_ip_header + 12, 8);
2302
2303 if ((txdw0 & CP_TX_TCPCS) && ip_protocol == IP_PROTO_TCP)
2304 {
2305 DPRINTF("+++ C+ mode calculating TCP checksum for "
2306 "packet with %d bytes data\n", ip_data_len);
2307
2308 ip_pseudo_header *p_tcpip_hdr = (ip_pseudo_header *)data_to_checksum;
2309 p_tcpip_hdr->zeros = 0;
2310 p_tcpip_hdr->ip_proto = IP_PROTO_TCP;
2311 p_tcpip_hdr->ip_payload = cpu_to_be16(ip_data_len);
2312
2313 tcp_header* p_tcp_hdr = (tcp_header *) (data_to_checksum+12);
2314
2315 p_tcp_hdr->th_sum = 0;
2316
2317 int tcp_checksum = ip_checksum(data_to_checksum, ip_data_len + 12);
2318 DPRINTF("+++ C+ mode TCP checksum %04x\n",
2319 tcp_checksum);
2320
2321 p_tcp_hdr->th_sum = tcp_checksum;
2322 }
2323 else if ((txdw0 & CP_TX_UDPCS) && ip_protocol == IP_PROTO_UDP)
2324 {
2325 DPRINTF("+++ C+ mode calculating UDP checksum for "
2326 "packet with %d bytes data\n", ip_data_len);
2327
2328 ip_pseudo_header *p_udpip_hdr = (ip_pseudo_header *)data_to_checksum;
2329 p_udpip_hdr->zeros = 0;
2330 p_udpip_hdr->ip_proto = IP_PROTO_UDP;
2331 p_udpip_hdr->ip_payload = cpu_to_be16(ip_data_len);
2332
2333 udp_header *p_udp_hdr = (udp_header *) (data_to_checksum+12);
2334
2335 p_udp_hdr->uh_sum = 0;
2336
2337 int udp_checksum = ip_checksum(data_to_checksum, ip_data_len + 12);
2338 DPRINTF("+++ C+ mode UDP checksum %04x\n",
2339 udp_checksum);
2340
2341 p_udp_hdr->uh_sum = udp_checksum;
2342 }
2343
2344 /* restore IP header */
2345 memcpy(eth_payload_data, saved_ip_header, hlen);
2346 }
2347 }
2348
2349 skip_offload:
2350 /* update tally counter */
2351 ++s->tally_counters.TxOk;
2352
2353 DPRINTF("+++ C+ mode transmitting %d bytes packet\n", saved_size);
2354
2355 rtl8139_transfer_frame(s, saved_buffer, saved_size, 1,
2356 (uint8_t *) dot1q_buffer);
2357
2358 /* restore card space if there was no recursion and reset offset */
2359 if (!s->cplus_txbuffer)
2360 {
2361 s->cplus_txbuffer = saved_buffer;
2362 s->cplus_txbuffer_len = saved_buffer_len;
2363 s->cplus_txbuffer_offset = 0;
2364 }
2365 else
2366 {
2367 g_free(saved_buffer);
2368 }
2369 }
2370 else
2371 {
2372 DPRINTF("+++ C+ mode transmission continue to next descriptor\n");
2373 }
2374
2375 return 1;
2376 }
2377
2378 static void rtl8139_cplus_transmit(RTL8139State *s)
2379 {
2380 int txcount = 0;
2381
2382 while (rtl8139_cplus_transmit_one(s))
2383 {
2384 ++txcount;
2385 }
2386
2387 /* Mark transfer completed */
2388 if (!txcount)
2389 {
2390 DPRINTF("C+ mode : transmitter queue stalled, current TxDesc = %d\n",
2391 s->currCPlusTxDesc);
2392 }
2393 else
2394 {
2395 /* update interrupt status */
2396 s->IntrStatus |= TxOK;
2397 rtl8139_update_irq(s);
2398 }
2399 }
2400
2401 static void rtl8139_transmit(RTL8139State *s)
2402 {
2403 int descriptor = s->currTxDesc, txcount = 0;
2404
2405 /*while*/
2406 if (rtl8139_transmit_one(s, descriptor))
2407 {
2408 ++s->currTxDesc;
2409 s->currTxDesc %= 4;
2410 ++txcount;
2411 }
2412
2413 /* Mark transfer completed */
2414 if (!txcount)
2415 {
2416 DPRINTF("transmitter queue stalled, current TxDesc = %d\n",
2417 s->currTxDesc);
2418 }
2419 }
2420
2421 static void rtl8139_TxStatus_write(RTL8139State *s, uint32_t txRegOffset, uint32_t val)
2422 {
2423
2424 int descriptor = txRegOffset/4;
2425
2426 /* handle C+ transmit mode register configuration */
2427
2428 if (s->cplus_enabled)
2429 {
2430 DPRINTF("RTL8139C+ DTCCR write offset=0x%x val=0x%08x "
2431 "descriptor=%d\n", txRegOffset, val, descriptor);
2432
2433 /* handle Dump Tally Counters command */
2434 s->TxStatus[descriptor] = val;
2435
2436 if (descriptor == 0 && (val & 0x8))
2437 {
2438 hwaddr tc_addr = rtl8139_addr64(s->TxStatus[0] & ~0x3f, s->TxStatus[1]);
2439
2440 /* dump tally counters to specified memory location */
2441 RTL8139TallyCounters_dma_write(s, tc_addr);
2442
2443 /* mark dump completed */
2444 s->TxStatus[0] &= ~0x8;
2445 }
2446
2447 return;
2448 }
2449
2450 DPRINTF("TxStatus write offset=0x%x val=0x%08x descriptor=%d\n",
2451 txRegOffset, val, descriptor);
2452
2453 /* mask only reserved bits */
2454 val &= ~0xff00c000; /* these bits are reset on write */
2455 val = SET_MASKED(val, 0x00c00000, s->TxStatus[descriptor]);
2456
2457 s->TxStatus[descriptor] = val;
2458
2459 /* attempt to start transmission */
2460 rtl8139_transmit(s);
2461 }
2462
2463 static uint32_t rtl8139_TxStatus_TxAddr_read(RTL8139State *s, uint32_t regs[],
2464 uint32_t base, uint8_t addr,
2465 int size)
2466 {
2467 uint32_t reg = (addr - base) / 4;
2468 uint32_t offset = addr & 0x3;
2469 uint32_t ret = 0;
2470
2471 if (addr & (size - 1)) {
2472 DPRINTF("not implemented read for TxStatus/TxAddr "
2473 "addr=0x%x size=0x%x\n", addr, size);
2474 return ret;
2475 }
2476
2477 switch (size) {
2478 case 1: /* fall through */
2479 case 2: /* fall through */
2480 case 4:
2481 ret = (regs[reg] >> offset * 8) & (((uint64_t)1 << (size * 8)) - 1);
2482 DPRINTF("TxStatus/TxAddr[%d] read addr=0x%x size=0x%x val=0x%08x\n",
2483 reg, addr, size, ret);
2484 break;
2485 default:
2486 DPRINTF("unsupported size 0x%x of TxStatus/TxAddr reading\n", size);
2487 break;
2488 }
2489
2490 return ret;
2491 }
2492
2493 static uint16_t rtl8139_TSAD_read(RTL8139State *s)
2494 {
2495 uint16_t ret = 0;
2496
2497 /* Simulate TSAD, it is read only anyway */
2498
2499 ret = ((s->TxStatus[3] & TxStatOK )?TSAD_TOK3:0)
2500 |((s->TxStatus[2] & TxStatOK )?TSAD_TOK2:0)
2501 |((s->TxStatus[1] & TxStatOK )?TSAD_TOK1:0)
2502 |((s->TxStatus[0] & TxStatOK )?TSAD_TOK0:0)
2503
2504 |((s->TxStatus[3] & TxUnderrun)?TSAD_TUN3:0)
2505 |((s->TxStatus[2] & TxUnderrun)?TSAD_TUN2:0)
2506 |((s->TxStatus[1] & TxUnderrun)?TSAD_TUN1:0)
2507 |((s->TxStatus[0] & TxUnderrun)?TSAD_TUN0:0)
2508
2509 |((s->TxStatus[3] & TxAborted )?TSAD_TABT3:0)
2510 |((s->TxStatus[2] & TxAborted )?TSAD_TABT2:0)
2511 |((s->TxStatus[1] & TxAborted )?TSAD_TABT1:0)
2512 |((s->TxStatus[0] & TxAborted )?TSAD_TABT0:0)
2513
2514 |((s->TxStatus[3] & TxHostOwns )?TSAD_OWN3:0)
2515 |((s->TxStatus[2] & TxHostOwns )?TSAD_OWN2:0)
2516 |((s->TxStatus[1] & TxHostOwns )?TSAD_OWN1:0)
2517 |((s->TxStatus[0] & TxHostOwns )?TSAD_OWN0:0) ;
2518
2519
2520 DPRINTF("TSAD read val=0x%04x\n", ret);
2521
2522 return ret;
2523 }
2524
2525 static uint16_t rtl8139_CSCR_read(RTL8139State *s)
2526 {
2527 uint16_t ret = s->CSCR;
2528
2529 DPRINTF("CSCR read val=0x%04x\n", ret);
2530
2531 return ret;
2532 }
2533
2534 static void rtl8139_TxAddr_write(RTL8139State *s, uint32_t txAddrOffset, uint32_t val)
2535 {
2536 DPRINTF("TxAddr write offset=0x%x val=0x%08x\n", txAddrOffset, val);
2537
2538 s->TxAddr[txAddrOffset/4] = val;
2539 }
2540
2541 static uint32_t rtl8139_TxAddr_read(RTL8139State *s, uint32_t txAddrOffset)
2542 {
2543 uint32_t ret = s->TxAddr[txAddrOffset/4];
2544
2545 DPRINTF("TxAddr read offset=0x%x val=0x%08x\n", txAddrOffset, ret);
2546
2547 return ret;
2548 }
2549
2550 static void rtl8139_RxBufPtr_write(RTL8139State *s, uint32_t val)
2551 {
2552 DPRINTF("RxBufPtr write val=0x%04x\n", val);
2553
2554 /* this value is off by 16 */
2555 s->RxBufPtr = MOD2(val + 0x10, s->RxBufferSize);
2556
2557 /* more buffer space may be available so try to receive */
2558 qemu_flush_queued_packets(qemu_get_queue(s->nic));
2559
2560 DPRINTF(" CAPR write: rx buffer length %d head 0x%04x read 0x%04x\n",
2561 s->RxBufferSize, s->RxBufAddr, s->RxBufPtr);
2562 }
2563
2564 static uint32_t rtl8139_RxBufPtr_read(RTL8139State *s)
2565 {
2566 /* this value is off by 16 */
2567 uint32_t ret = s->RxBufPtr - 0x10;
2568
2569 DPRINTF("RxBufPtr read val=0x%04x\n", ret);
2570
2571 return ret;
2572 }
2573
2574 static uint32_t rtl8139_RxBufAddr_read(RTL8139State *s)
2575 {
2576 /* this value is NOT off by 16 */
2577 uint32_t ret = s->RxBufAddr;
2578
2579 DPRINTF("RxBufAddr read val=0x%04x\n", ret);
2580
2581 return ret;
2582 }
2583
2584 static void rtl8139_RxBuf_write(RTL8139State *s, uint32_t val)
2585 {
2586 DPRINTF("RxBuf write val=0x%08x\n", val);
2587
2588 s->RxBuf = val;
2589
2590 /* may need to reset rxring here */
2591 }
2592
2593 static uint32_t rtl8139_RxBuf_read(RTL8139State *s)
2594 {
2595 uint32_t ret = s->RxBuf;
2596
2597 DPRINTF("RxBuf read val=0x%08x\n", ret);
2598
2599 return ret;
2600 }
2601
2602 static void rtl8139_IntrMask_write(RTL8139State *s, uint32_t val)
2603 {
2604 DPRINTF("IntrMask write(w) val=0x%04x\n", val);
2605
2606 /* mask unwritable bits */
2607 val = SET_MASKED(val, 0x1e00, s->IntrMask);
2608
2609 s->IntrMask = val;
2610
2611 rtl8139_update_irq(s);
2612
2613 }
2614
2615 static uint32_t rtl8139_IntrMask_read(RTL8139State *s)
2616 {
2617 uint32_t ret = s->IntrMask;
2618
2619 DPRINTF("IntrMask read(w) val=0x%04x\n", ret);
2620
2621 return ret;
2622 }
2623
2624 static void rtl8139_IntrStatus_write(RTL8139State *s, uint32_t val)
2625 {
2626 DPRINTF("IntrStatus write(w) val=0x%04x\n", val);
2627
2628 #if 0
2629
2630 /* writing to ISR has no effect */
2631
2632 return;
2633
2634 #else
2635 uint16_t newStatus = s->IntrStatus & ~val;
2636
2637 /* mask unwritable bits */
2638 newStatus = SET_MASKED(newStatus, 0x1e00, s->IntrStatus);
2639
2640 /* writing 1 to interrupt status register bit clears it */
2641 s->IntrStatus = 0;
2642 rtl8139_update_irq(s);
2643
2644 s->IntrStatus = newStatus;
2645 rtl8139_set_next_tctr_time(s);
2646 rtl8139_update_irq(s);
2647
2648 #endif
2649 }
2650
2651 static uint32_t rtl8139_IntrStatus_read(RTL8139State *s)
2652 {
2653 uint32_t ret = s->IntrStatus;
2654
2655 DPRINTF("IntrStatus read(w) val=0x%04x\n", ret);
2656
2657 #if 0
2658
2659 /* reading ISR clears all interrupts */
2660 s->IntrStatus = 0;
2661
2662 rtl8139_update_irq(s);
2663
2664 #endif
2665
2666 return ret;
2667 }
2668
2669 static void rtl8139_MultiIntr_write(RTL8139State *s, uint32_t val)
2670 {
2671 DPRINTF("MultiIntr write(w) val=0x%04x\n", val);
2672
2673 /* mask unwritable bits */
2674 val = SET_MASKED(val, 0xf000, s->MultiIntr);
2675
2676 s->MultiIntr = val;
2677 }
2678
2679 static uint32_t rtl8139_MultiIntr_read(RTL8139State *s)
2680 {
2681 uint32_t ret = s->MultiIntr;
2682
2683 DPRINTF("MultiIntr read(w) val=0x%04x\n", ret);
2684
2685 return ret;
2686 }
2687
2688 static void rtl8139_io_writeb(void *opaque, uint8_t addr, uint32_t val)
2689 {
2690 RTL8139State *s = opaque;
2691
2692 switch (addr)
2693 {
2694 case MAC0 ... MAC0+4:
2695 s->phys[addr - MAC0] = val;
2696 break;
2697 case MAC0+5:
2698 s->phys[addr - MAC0] = val;
2699 qemu_format_nic_info_str(qemu_get_queue(s->nic), s->phys);
2700 break;
2701 case MAC0+6 ... MAC0+7:
2702 /* reserved */
2703 break;
2704 case MAR0 ... MAR0+7:
2705 s->mult[addr - MAR0] = val;
2706 break;
2707 case ChipCmd:
2708 rtl8139_ChipCmd_write(s, val);
2709 break;
2710 case Cfg9346:
2711 rtl8139_Cfg9346_write(s, val);
2712 break;
2713 case TxConfig: /* windows driver sometimes writes using byte-lenth call */
2714 rtl8139_TxConfig_writeb(s, val);
2715 break;
2716 case Config0:
2717 rtl8139_Config0_write(s, val);
2718 break;
2719 case Config1:
2720 rtl8139_Config1_write(s, val);
2721 break;
2722 case Config3:
2723 rtl8139_Config3_write(s, val);
2724 break;
2725 case Config4:
2726 rtl8139_Config4_write(s, val);
2727 break;
2728 case Config5:
2729 rtl8139_Config5_write(s, val);
2730 break;
2731 case MediaStatus:
2732 /* ignore */
2733 DPRINTF("not implemented write(b) to MediaStatus val=0x%02x\n",
2734 val);
2735 break;
2736
2737 case HltClk:
2738 DPRINTF("HltClk write val=0x%08x\n", val);
2739 if (val == 'R')
2740 {
2741 s->clock_enabled = 1;
2742 }
2743 else if (val == 'H')
2744 {
2745 s->clock_enabled = 0;
2746 }
2747 break;
2748
2749 case TxThresh:
2750 DPRINTF("C+ TxThresh write(b) val=0x%02x\n", val);
2751 s->TxThresh = val;
2752 break;
2753
2754 case TxPoll:
2755 DPRINTF("C+ TxPoll write(b) val=0x%02x\n", val);
2756 if (val & (1 << 7))
2757 {
2758 DPRINTF("C+ TxPoll high priority transmission (not "
2759 "implemented)\n");
2760 //rtl8139_cplus_transmit(s);
2761 }
2762 if (val & (1 << 6))
2763 {
2764 DPRINTF("C+ TxPoll normal priority transmission\n");
2765 rtl8139_cplus_transmit(s);
2766 }
2767
2768 break;
2769
2770 default:
2771 DPRINTF("not implemented write(b) addr=0x%x val=0x%02x\n", addr,
2772 val);
2773 break;
2774 }
2775 }
2776
2777 static void rtl8139_io_writew(void *opaque, uint8_t addr, uint32_t val)
2778 {
2779 RTL8139State *s = opaque;
2780
2781 switch (addr)
2782 {
2783 case IntrMask:
2784 rtl8139_IntrMask_write(s, val);
2785 break;
2786
2787 case IntrStatus:
2788 rtl8139_IntrStatus_write(s, val);
2789 break;
2790
2791 case MultiIntr:
2792 rtl8139_MultiIntr_write(s, val);
2793 break;
2794
2795 case RxBufPtr:
2796 rtl8139_RxBufPtr_write(s, val);
2797 break;
2798
2799 case BasicModeCtrl:
2800 rtl8139_BasicModeCtrl_write(s, val);
2801 break;
2802 case BasicModeStatus:
2803 rtl8139_BasicModeStatus_write(s, val);
2804 break;
2805 case NWayAdvert:
2806 DPRINTF("NWayAdvert write(w) val=0x%04x\n", val);
2807 s->NWayAdvert = val;
2808 break;
2809 case NWayLPAR:
2810 DPRINTF("forbidden NWayLPAR write(w) val=0x%04x\n", val);
2811 break;
2812 case NWayExpansion:
2813 DPRINTF("NWayExpansion write(w) val=0x%04x\n", val);
2814 s->NWayExpansion = val;
2815 break;
2816
2817 case CpCmd:
2818 rtl8139_CpCmd_write(s, val);
2819 break;
2820
2821 case IntrMitigate:
2822 rtl8139_IntrMitigate_write(s, val);
2823 break;
2824
2825 default:
2826 DPRINTF("ioport write(w) addr=0x%x val=0x%04x via write(b)\n",
2827 addr, val);
2828
2829 rtl8139_io_writeb(opaque, addr, val & 0xff);
2830 rtl8139_io_writeb(opaque, addr + 1, (val >> 8) & 0xff);
2831 break;
2832 }
2833 }
2834
2835 static void rtl8139_set_next_tctr_time(RTL8139State *s)
2836 {
2837 const uint64_t ns_per_period =
2838 muldiv64(0x100000000LL, get_ticks_per_sec(), PCI_FREQUENCY);
2839
2840 DPRINTF("entered rtl8139_set_next_tctr_time\n");
2841
2842 /* This function is called at least once per period, so it is a good
2843 * place to update the timer base.
2844 *
2845 * After one iteration of this loop the value in the Timer register does
2846 * not change, but the device model is counting up by 2^32 ticks (approx.
2847 * 130 seconds).
2848 */
2849 while (s->TCTR_base + ns_per_period <= qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)) {
2850 s->TCTR_base += ns_per_period;
2851 }
2852
2853 if (!s->TimerInt) {
2854 timer_del(s->timer);
2855 } else {
2856 uint64_t delta = muldiv64(s->TimerInt, get_ticks_per_sec(), PCI_FREQUENCY);
2857 if (s->TCTR_base + delta <= qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)) {
2858 delta += ns_per_period;
2859 }
2860 timer_mod(s->timer, s->TCTR_base + delta);
2861 }
2862 }
2863
2864 static void rtl8139_io_writel(void *opaque, uint8_t addr, uint32_t val)
2865 {
2866 RTL8139State *s = opaque;
2867
2868 switch (addr)
2869 {
2870 case RxMissed:
2871 DPRINTF("RxMissed clearing on write\n");
2872 s->RxMissed = 0;
2873 break;
2874
2875 case TxConfig:
2876 rtl8139_TxConfig_write(s, val);
2877 break;
2878
2879 case RxConfig:
2880 rtl8139_RxConfig_write(s, val);
2881 break;
2882
2883 case TxStatus0 ... TxStatus0+4*4-1:
2884 rtl8139_TxStatus_write(s, addr-TxStatus0, val);
2885 break;
2886
2887 case TxAddr0 ... TxAddr0+4*4-1:
2888 rtl8139_TxAddr_write(s, addr-TxAddr0, val);
2889 break;
2890
2891 case RxBuf:
2892 rtl8139_RxBuf_write(s, val);
2893 break;
2894
2895 case RxRingAddrLO:
2896 DPRINTF("C+ RxRing low bits write val=0x%08x\n", val);
2897 s->RxRingAddrLO = val;
2898 break;
2899
2900 case RxRingAddrHI:
2901 DPRINTF("C+ RxRing high bits write val=0x%08x\n", val);
2902 s->RxRingAddrHI = val;
2903 break;
2904
2905 case Timer:
2906 DPRINTF("TCTR Timer reset on write\n");
2907 s->TCTR_base = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
2908 rtl8139_set_next_tctr_time(s);
2909 break;
2910
2911 case FlashReg:
2912 DPRINTF("FlashReg TimerInt write val=0x%08x\n", val);
2913 if (s->TimerInt != val) {
2914 s->TimerInt = val;
2915 rtl8139_set_next_tctr_time(s);
2916 }
2917 break;
2918
2919 default:
2920 DPRINTF("ioport write(l) addr=0x%x val=0x%08x via write(b)\n",
2921 addr, val);
2922 rtl8139_io_writeb(opaque, addr, val & 0xff);
2923 rtl8139_io_writeb(opaque, addr + 1, (val >> 8) & 0xff);
2924 rtl8139_io_writeb(opaque, addr + 2, (val >> 16) & 0xff);
2925 rtl8139_io_writeb(opaque, addr + 3, (val >> 24) & 0xff);
2926 break;
2927 }
2928 }
2929
2930 static uint32_t rtl8139_io_readb(void *opaque, uint8_t addr)
2931 {
2932 RTL8139State *s = opaque;
2933 int ret;
2934
2935 switch (addr)
2936 {
2937 case MAC0 ... MAC0+5:
2938 ret = s->phys[addr - MAC0];
2939 break;
2940 case MAC0+6 ... MAC0+7:
2941 ret = 0;
2942 break;
2943 case MAR0 ... MAR0+7:
2944 ret = s->mult[addr - MAR0];
2945 break;
2946 case TxStatus0 ... TxStatus0+4*4-1:
2947 ret = rtl8139_TxStatus_TxAddr_read(s, s->TxStatus, TxStatus0,
2948 addr, 1);
2949 break;
2950 case ChipCmd:
2951 ret = rtl8139_ChipCmd_read(s);
2952 break;
2953 case Cfg9346:
2954 ret = rtl8139_Cfg9346_read(s);
2955 break;
2956 case Config0:
2957 ret = rtl8139_Config0_read(s);
2958 break;
2959 case Config1:
2960 ret = rtl8139_Config1_read(s);
2961 break;
2962 case Config3:
2963 ret = rtl8139_Config3_read(s);
2964 break;
2965 case Config4:
2966 ret = rtl8139_Config4_read(s);
2967 break;
2968 case Config5:
2969 ret = rtl8139_Config5_read(s);
2970 break;
2971
2972 case MediaStatus:
2973 /* The LinkDown bit of MediaStatus is inverse with link status */
2974 ret = 0xd0 | (~s->BasicModeStatus & 0x04);
2975 DPRINTF("MediaStatus read 0x%x\n", ret);
2976 break;
2977
2978 case HltClk:
2979 ret = s->clock_enabled;
2980 DPRINTF("HltClk read 0x%x\n", ret);
2981 break;
2982
2983 case PCIRevisionID:
2984 ret = RTL8139_PCI_REVID;
2985 DPRINTF("PCI Revision ID read 0x%x\n", ret);
2986 break;
2987
2988 case TxThresh:
2989 ret = s->TxThresh;
2990 DPRINTF("C+ TxThresh read(b) val=0x%02x\n", ret);
2991 break;
2992
2993 case 0x43: /* Part of TxConfig register. Windows driver tries to read it */
2994 ret = s->TxConfig >> 24;
2995 DPRINTF("RTL8139C TxConfig at 0x43 read(b) val=0x%02x\n", ret);
2996 break;
2997
2998 default:
2999 DPRINTF("not implemented read(b) addr=0x%x\n", addr);
3000 ret = 0;
3001 break;
3002 }
3003
3004 return ret;
3005 }
3006
3007 static uint32_t rtl8139_io_readw(void *opaque, uint8_t addr)
3008 {
3009 RTL8139State *s = opaque;
3010 uint32_t ret;
3011
3012 switch (addr)
3013 {
3014 case TxAddr0 ... TxAddr0+4*4-1:
3015 ret = rtl8139_TxStatus_TxAddr_read(s, s->TxAddr, TxAddr0, addr, 2);
3016 break;
3017 case IntrMask:
3018 ret = rtl8139_IntrMask_read(s);
3019 break;
3020
3021 case IntrStatus:
3022 ret = rtl8139_IntrStatus_read(s);
3023 break;
3024
3025 case MultiIntr:
3026 ret = rtl8139_MultiIntr_read(s);
3027 break;
3028
3029 case RxBufPtr:
3030 ret = rtl8139_RxBufPtr_read(s);
3031 break;
3032
3033 case RxBufAddr:
3034 ret = rtl8139_RxBufAddr_read(s);
3035 break;
3036
3037 case BasicModeCtrl:
3038 ret = rtl8139_BasicModeCtrl_read(s);
3039 break;
3040 case BasicModeStatus:
3041 ret = rtl8139_BasicModeStatus_read(s);
3042 break;
3043 case NWayAdvert:
3044 ret = s->NWayAdvert;
3045 DPRINTF("NWayAdvert read(w) val=0x%04x\n", ret);
3046 break;
3047 case NWayLPAR:
3048 ret = s->NWayLPAR;
3049 DPRINTF("NWayLPAR read(w) val=0x%04x\n", ret);
3050 break;
3051 case NWayExpansion:
3052 ret = s->NWayExpansion;
3053 DPRINTF("NWayExpansion read(w) val=0x%04x\n", ret);
3054 break;
3055
3056 case CpCmd:
3057 ret = rtl8139_CpCmd_read(s);
3058 break;
3059
3060 case IntrMitigate:
3061 ret = rtl8139_IntrMitigate_read(s);
3062 break;
3063
3064 case TxSummary:
3065 ret = rtl8139_TSAD_read(s);
3066 break;
3067
3068 case CSCR:
3069 ret = rtl8139_CSCR_read(s);
3070 break;
3071
3072 default:
3073 DPRINTF("ioport read(w) addr=0x%x via read(b)\n", addr);
3074
3075 ret = rtl8139_io_readb(opaque, addr);
3076 ret |= rtl8139_io_readb(opaque, addr + 1) << 8;
3077
3078 DPRINTF("ioport read(w) addr=0x%x val=0x%04x\n", addr, ret);
3079 break;
3080 }
3081
3082 return ret;
3083 }
3084
3085 static uint32_t rtl8139_io_readl(void *opaque, uint8_t addr)
3086 {
3087 RTL8139State *s = opaque;
3088 uint32_t ret;
3089
3090 switch (addr)
3091 {
3092 case RxMissed:
3093 ret = s->RxMissed;
3094
3095 DPRINTF("RxMissed read val=0x%08x\n", ret);
3096 break;
3097
3098 case TxConfig:
3099 ret = rtl8139_TxConfig_read(s);
3100 break;
3101
3102 case RxConfig:
3103 ret = rtl8139_RxConfig_read(s);
3104 break;
3105
3106 case TxStatus0 ... TxStatus0+4*4-1:
3107 ret = rtl8139_TxStatus_TxAddr_read(s, s->TxStatus, TxStatus0,
3108 addr, 4);
3109 break;
3110
3111 case TxAddr0 ... TxAddr0+4*4-1:
3112 ret = rtl8139_TxAddr_read(s, addr-TxAddr0);
3113 break;
3114
3115 case RxBuf:
3116 ret = rtl8139_RxBuf_read(s);
3117 break;
3118
3119 case RxRingAddrLO:
3120 ret = s->RxRingAddrLO;
3121 DPRINTF("C+ RxRing low bits read val=0x%08x\n", ret);
3122 break;
3123
3124 case RxRingAddrHI:
3125 ret = s->RxRingAddrHI;
3126 DPRINTF("C+ RxRing high bits read val=0x%08x\n", ret);
3127 break;
3128
3129 case Timer:
3130 ret = muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - s->TCTR_base,
3131 PCI_FREQUENCY, get_ticks_per_sec());
3132 DPRINTF("TCTR Timer read val=0x%08x\n", ret);
3133 break;
3134
3135 case FlashReg:
3136 ret = s->TimerInt;
3137 DPRINTF("FlashReg TimerInt read val=0x%08x\n", ret);
3138 break;
3139
3140 default:
3141 DPRINTF("ioport read(l) addr=0x%x via read(b)\n", addr);
3142
3143 ret = rtl8139_io_readb(opaque, addr);
3144 ret |= rtl8139_io_readb(opaque, addr + 1) << 8;
3145 ret |= rtl8139_io_readb(opaque, addr + 2) << 16;
3146 ret |= rtl8139_io_readb(opaque, addr + 3) << 24;
3147
3148 DPRINTF("read(l) addr=0x%x val=%08x\n", addr, ret);
3149 break;
3150 }
3151
3152 return ret;
3153 }
3154
3155 /* */
3156
3157 static void rtl8139_mmio_writeb(void *opaque, hwaddr addr, uint32_t val)
3158 {
3159 rtl8139_io_writeb(opaque, addr & 0xFF, val);
3160 }
3161
3162 static void rtl8139_mmio_writew(void *opaque, hwaddr addr, uint32_t val)
3163 {
3164 rtl8139_io_writew(opaque, addr & 0xFF, val);
3165 }
3166
3167 static void rtl8139_mmio_writel(void *opaque, hwaddr addr, uint32_t val)
3168 {
3169 rtl8139_io_writel(opaque, addr & 0xFF, val);
3170 }
3171
3172 static uint32_t rtl8139_mmio_readb(void *opaque, hwaddr addr)
3173 {
3174 return rtl8139_io_readb(opaque, addr & 0xFF);
3175 }
3176
3177 static uint32_t rtl8139_mmio_readw(void *opaque, hwaddr addr)
3178 {
3179 uint32_t val = rtl8139_io_readw(opaque, addr & 0xFF);
3180 return val;
3181 }
3182
3183 static uint32_t rtl8139_mmio_readl(void *opaque, hwaddr addr)
3184 {
3185 uint32_t val = rtl8139_io_readl(opaque, addr & 0xFF);
3186 return val;
3187 }
3188
3189 static int rtl8139_post_load(void *opaque, int version_id)
3190 {
3191 RTL8139State* s = opaque;
3192 rtl8139_set_next_tctr_time(s);
3193 if (version_id < 4) {
3194 s->cplus_enabled = s->CpCmd != 0;
3195 }
3196
3197 /* nc.link_down can't be migrated, so infer link_down according
3198 * to link status bit in BasicModeStatus */
3199 qemu_get_queue(s->nic)->link_down = (s->BasicModeStatus & 0x04) == 0;
3200
3201 return 0;
3202 }
3203
3204 static bool rtl8139_hotplug_ready_needed(void *opaque)
3205 {
3206 return qdev_machine_modified();
3207 }
3208
3209 static const VMStateDescription vmstate_rtl8139_hotplug_ready ={
3210 .name = "rtl8139/hotplug_ready",
3211 .version_id = 1,
3212 .minimum_version_id = 1,
3213 .needed = rtl8139_hotplug_ready_needed,
3214 .fields = (VMStateField[]) {
3215 VMSTATE_END_OF_LIST()
3216 }
3217 };
3218
3219 static void rtl8139_pre_save(void *opaque)
3220 {
3221 RTL8139State* s = opaque;
3222 int64_t current_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
3223
3224 /* for migration to older versions */
3225 s->TCTR = muldiv64(current_time - s->TCTR_base, PCI_FREQUENCY,
3226 get_ticks_per_sec());
3227 s->rtl8139_mmio_io_addr_dummy = 0;
3228 }
3229
3230 static const VMStateDescription vmstate_rtl8139 = {
3231 .name = "rtl8139",
3232 .version_id = 4,
3233 .minimum_version_id = 3,
3234 .post_load = rtl8139_post_load,
3235 .pre_save = rtl8139_pre_save,
3236 .fields = (VMStateField[]) {
3237 VMSTATE_PCI_DEVICE(parent_obj, RTL8139State),
3238 VMSTATE_PARTIAL_BUFFER(phys, RTL8139State, 6),
3239 VMSTATE_BUFFER(mult, RTL8139State),
3240 VMSTATE_UINT32_ARRAY(TxStatus, RTL8139State, 4),
3241 VMSTATE_UINT32_ARRAY(TxAddr, RTL8139State, 4),
3242
3243 VMSTATE_UINT32(RxBuf, RTL8139State),
3244 VMSTATE_UINT32(RxBufferSize, RTL8139State),
3245 VMSTATE_UINT32(RxBufPtr, RTL8139State),
3246 VMSTATE_UINT32(RxBufAddr, RTL8139State),
3247
3248 VMSTATE_UINT16(IntrStatus, RTL8139State),
3249 VMSTATE_UINT16(IntrMask, RTL8139State),
3250
3251 VMSTATE_UINT32(TxConfig, RTL8139State),
3252 VMSTATE_UINT32(RxConfig, RTL8139State),
3253 VMSTATE_UINT32(RxMissed, RTL8139State),
3254 VMSTATE_UINT16(CSCR, RTL8139State),
3255
3256 VMSTATE_UINT8(Cfg9346, RTL8139State),
3257 VMSTATE_UINT8(Config0, RTL8139State),
3258 VMSTATE_UINT8(Config1, RTL8139State),
3259 VMSTATE_UINT8(Config3, RTL8139State),
3260 VMSTATE_UINT8(Config4, RTL8139State),
3261 VMSTATE_UINT8(Config5, RTL8139State),
3262
3263 VMSTATE_UINT8(clock_enabled, RTL8139State),
3264 VMSTATE_UINT8(bChipCmdState, RTL8139State),
3265
3266 VMSTATE_UINT16(MultiIntr, RTL8139State),
3267
3268 VMSTATE_UINT16(BasicModeCtrl, RTL8139State),
3269 VMSTATE_UINT16(BasicModeStatus, RTL8139State),
3270 VMSTATE_UINT16(NWayAdvert, RTL8139State),
3271 VMSTATE_UINT16(NWayLPAR, RTL8139State),
3272 VMSTATE_UINT16(NWayExpansion, RTL8139State),
3273
3274 VMSTATE_UINT16(CpCmd, RTL8139State),
3275 VMSTATE_UINT8(TxThresh, RTL8139State),
3276
3277 VMSTATE_UNUSED(4),
3278 VMSTATE_MACADDR(conf.macaddr, RTL8139State),
3279 VMSTATE_INT32(rtl8139_mmio_io_addr_dummy, RTL8139State),
3280
3281 VMSTATE_UINT32(currTxDesc, RTL8139State),
3282 VMSTATE_UINT32(currCPlusRxDesc, RTL8139State),
3283 VMSTATE_UINT32(currCPlusTxDesc, RTL8139State),
3284 VMSTATE_UINT32(RxRingAddrLO, RTL8139State),
3285 VMSTATE_UINT32(RxRingAddrHI, RTL8139State),
3286
3287 VMSTATE_UINT16_ARRAY(eeprom.contents, RTL8139State, EEPROM_9346_SIZE),
3288 VMSTATE_INT32(eeprom.mode, RTL8139State),
3289 VMSTATE_UINT32(eeprom.tick, RTL8139State),
3290 VMSTATE_UINT8(eeprom.address, RTL8139State),
3291 VMSTATE_UINT16(eeprom.input, RTL8139State),
3292 VMSTATE_UINT16(eeprom.output, RTL8139State),
3293
3294 VMSTATE_UINT8(eeprom.eecs, RTL8139State),
3295 VMSTATE_UINT8(eeprom.eesk, RTL8139State),
3296 VMSTATE_UINT8(eeprom.eedi, RTL8139State),
3297 VMSTATE_UINT8(eeprom.eedo, RTL8139State),
3298
3299 VMSTATE_UINT32(TCTR, RTL8139State),
3300 VMSTATE_UINT32(TimerInt, RTL8139State),
3301 VMSTATE_INT64(TCTR_base, RTL8139State),
3302
3303 VMSTATE_STRUCT(tally_counters, RTL8139State, 0,
3304 vmstate_tally_counters, RTL8139TallyCounters),
3305
3306 VMSTATE_UINT32_V(cplus_enabled, RTL8139State, 4),
3307 VMSTATE_END_OF_LIST()
3308 },
3309 .subsections = (const VMStateDescription*[]) {
3310 &vmstate_rtl8139_hotplug_ready,
3311 NULL
3312 }
3313 };
3314
3315 /***********************************************************/
3316 /* PCI RTL8139 definitions */
3317
3318 static void rtl8139_ioport_write(void *opaque, hwaddr addr,
3319 uint64_t val, unsigned size)
3320 {
3321 switch (size) {
3322 case 1:
3323 rtl8139_io_writeb(opaque, addr, val);
3324 break;
3325 case 2:
3326 rtl8139_io_writew(opaque, addr, val);
3327 break;
3328 case 4:
3329 rtl8139_io_writel(opaque, addr, val);
3330 break;
3331 }
3332 }
3333
3334 static uint64_t rtl8139_ioport_read(void *opaque, hwaddr addr,
3335 unsigned size)
3336 {
3337 switch (size) {
3338 case 1:
3339 return rtl8139_io_readb(opaque, addr);
3340 case 2:
3341 return rtl8139_io_readw(opaque, addr);
3342 case 4:
3343 return rtl8139_io_readl(opaque, addr);
3344 }
3345
3346 return -1;
3347 }
3348
3349 static const MemoryRegionOps rtl8139_io_ops = {
3350 .read = rtl8139_ioport_read,
3351 .write = rtl8139_ioport_write,
3352 .impl = {
3353 .min_access_size = 1,
3354 .max_access_size = 4,
3355 },
3356 .endianness = DEVICE_LITTLE_ENDIAN,
3357 };
3358
3359 static const MemoryRegionOps rtl8139_mmio_ops = {
3360 .old_mmio = {
3361 .read = {
3362 rtl8139_mmio_readb,
3363 rtl8139_mmio_readw,
3364 rtl8139_mmio_readl,
3365 },
3366 .write = {
3367 rtl8139_mmio_writeb,
3368 rtl8139_mmio_writew,
3369 rtl8139_mmio_writel,
3370 },
3371 },
3372 .endianness = DEVICE_LITTLE_ENDIAN,
3373 };
3374
3375 static void rtl8139_timer(void *opaque)
3376 {
3377 RTL8139State *s = opaque;
3378
3379 if (!s->clock_enabled)
3380 {
3381 DPRINTF(">>> timer: clock is not running\n");
3382 return;
3383 }
3384
3385 s->IntrStatus |= PCSTimeout;
3386 rtl8139_update_irq(s);
3387 rtl8139_set_next_tctr_time(s);
3388 }
3389
3390 static void pci_rtl8139_uninit(PCIDevice *dev)
3391 {
3392 RTL8139State *s = RTL8139(dev);
3393
3394 if (s->cplus_txbuffer) {
3395 g_free(s->cplus_txbuffer);
3396 s->cplus_txbuffer = NULL;
3397 }
3398 timer_del(s->timer);
3399 timer_free(s->timer);
3400 qemu_del_nic(s->nic);
3401 }
3402
3403 static void rtl8139_set_link_status(NetClientState *nc)
3404 {
3405 RTL8139State *s = qemu_get_nic_opaque(nc);
3406
3407 if (nc->link_down) {
3408 s->BasicModeStatus &= ~0x04;
3409 } else {
3410 s->BasicModeStatus |= 0x04;
3411 }
3412
3413 s->IntrStatus |= RxUnderrun;
3414 rtl8139_update_irq(s);
3415 }
3416
3417 static NetClientInfo net_rtl8139_info = {
3418 .type = NET_CLIENT_OPTIONS_KIND_NIC,
3419 .size = sizeof(NICState),
3420 .can_receive = rtl8139_can_receive,
3421 .receive = rtl8139_receive,
3422 .link_status_changed = rtl8139_set_link_status,
3423 };
3424
3425 static void pci_rtl8139_realize(PCIDevice *dev, Error **errp)
3426 {
3427 RTL8139State *s = RTL8139(dev);
3428 DeviceState *d = DEVICE(dev);
3429 uint8_t *pci_conf;
3430
3431 pci_conf = dev->config;
3432 pci_conf[PCI_INTERRUPT_PIN] = 1; /* interrupt pin A */
3433 /* TODO: start of capability list, but no capability
3434 * list bit in status register, and offset 0xdc seems unused. */
3435 pci_conf[PCI_CAPABILITY_LIST] = 0xdc;
3436
3437 memory_region_init_io(&s->bar_io, OBJECT(s), &rtl8139_io_ops, s,
3438 "rtl8139", 0x100);
3439 memory_region_init_io(&s->bar_mem, OBJECT(s), &rtl8139_mmio_ops, s,
3440 "rtl8139", 0x100);
3441 pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->bar_io);
3442 pci_register_bar(dev, 1, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->bar_mem);
3443
3444 qemu_macaddr_default_if_unset(&s->conf.macaddr);
3445
3446 /* prepare eeprom */
3447 s->eeprom.contents[0] = 0x8129;
3448 #if 1
3449 /* PCI vendor and device ID should be mirrored here */
3450 s->eeprom.contents[1] = PCI_VENDOR_ID_REALTEK;
3451 s->eeprom.contents[2] = PCI_DEVICE_ID_REALTEK_8139;
3452 #endif
3453 s->eeprom.contents[7] = s->conf.macaddr.a[0] | s->conf.macaddr.a[1] << 8;
3454 s->eeprom.contents[8] = s->conf.macaddr.a[2] | s->conf.macaddr.a[3] << 8;
3455 s->eeprom.contents[9] = s->conf.macaddr.a[4] | s->conf.macaddr.a[5] << 8;
3456
3457 s->nic = qemu_new_nic(&net_rtl8139_info, &s->conf,
3458 object_get_typename(OBJECT(dev)), d->id, s);
3459 qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
3460
3461 s->cplus_txbuffer = NULL;
3462 s->cplus_txbuffer_len = 0;
3463 s->cplus_txbuffer_offset = 0;
3464
3465 s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, rtl8139_timer, s);
3466 }
3467
3468 static void rtl8139_instance_init(Object *obj)
3469 {
3470 RTL8139State *s = RTL8139(obj);
3471
3472 device_add_bootindex_property(obj, &s->conf.bootindex,
3473 "bootindex", "/ethernet-phy@0",
3474 DEVICE(obj), NULL);
3475 }
3476
3477 static Property rtl8139_properties[] = {
3478 DEFINE_NIC_PROPERTIES(RTL8139State, conf),
3479 DEFINE_PROP_END_OF_LIST(),
3480 };
3481
3482 static void rtl8139_class_init(ObjectClass *klass, void *data)
3483 {
3484 DeviceClass *dc = DEVICE_CLASS(klass);
3485 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
3486
3487 k->realize = pci_rtl8139_realize;
3488 k->exit = pci_rtl8139_uninit;
3489 k->romfile = "efi-rtl8139.rom";
3490 k->vendor_id = PCI_VENDOR_ID_REALTEK;
3491 k->device_id = PCI_DEVICE_ID_REALTEK_8139;
3492 k->revision = RTL8139_PCI_REVID; /* >=0x20 is for 8139C+ */
3493 k->class_id = PCI_CLASS_NETWORK_ETHERNET;
3494 dc->reset = rtl8139_reset;
3495 dc->vmsd = &vmstate_rtl8139;
3496 dc->props = rtl8139_properties;
3497 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
3498 }
3499
3500 static const TypeInfo rtl8139_info = {
3501 .name = TYPE_RTL8139,
3502 .parent = TYPE_PCI_DEVICE,
3503 .instance_size = sizeof(RTL8139State),
3504 .class_init = rtl8139_class_init,
3505 .instance_init = rtl8139_instance_init,
3506 };
3507
3508 static void rtl8139_register_types(void)
3509 {
3510 type_register_static(&rtl8139_info);
3511 }
3512
3513 type_init(rtl8139_register_types)
AR7 emulation for QEMU