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[qemu.git] / hw / net / dp8393x.c
blob0fa652c392020cc859006dbc742f8070f00f5ac8
1 /*
2 * QEMU NS SONIC DP8393x netcard
3 *
4 * Copyright (c) 2008-2009 Herve Poussineau
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 of
9 * the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "qemu/osdep.h"
21 #include "hw/sysbus.h"
22 #include "hw/devices.h"
23 #include "net/net.h"
24 #include "qapi/error.h"
25 #include "qemu/timer.h"
26 #include <zlib.h>
27
28 //#define DEBUG_SONIC
29
30 #define SONIC_PROM_SIZE 0x1000
31
32 #ifdef DEBUG_SONIC
33 #define DPRINTF(fmt, ...) \
34 do { printf("sonic: " fmt , ## __VA_ARGS__); } while (0)
35 static const char* reg_names[] = {
36 "CR", "DCR", "RCR", "TCR", "IMR", "ISR", "UTDA", "CTDA",
37 "TPS", "TFC", "TSA0", "TSA1", "TFS", "URDA", "CRDA", "CRBA0",
38 "CRBA1", "RBWC0", "RBWC1", "EOBC", "URRA", "RSA", "REA", "RRP",
39 "RWP", "TRBA0", "TRBA1", "0x1b", "0x1c", "0x1d", "0x1e", "LLFA",
40 "TTDA", "CEP", "CAP2", "CAP1", "CAP0", "CE", "CDP", "CDC",
41 "SR", "WT0", "WT1", "RSC", "CRCT", "FAET", "MPT", "MDT",
42 "0x30", "0x31", "0x32", "0x33", "0x34", "0x35", "0x36", "0x37",
43 "0x38", "0x39", "0x3a", "0x3b", "0x3c", "0x3d", "0x3e", "DCR2" };
44 #else
45 #define DPRINTF(fmt, ...) do {} while (0)
46 #endif
47
48 #define SONIC_ERROR(fmt, ...) \
49 do { printf("sonic ERROR: %s: " fmt, __func__ , ## __VA_ARGS__); } while (0)
50
51 #define SONIC_CR 0x00
52 #define SONIC_DCR 0x01
53 #define SONIC_RCR 0x02
54 #define SONIC_TCR 0x03
55 #define SONIC_IMR 0x04
56 #define SONIC_ISR 0x05
57 #define SONIC_UTDA 0x06
58 #define SONIC_CTDA 0x07
59 #define SONIC_TPS 0x08
60 #define SONIC_TFC 0x09
61 #define SONIC_TSA0 0x0a
62 #define SONIC_TSA1 0x0b
63 #define SONIC_TFS 0x0c
64 #define SONIC_URDA 0x0d
65 #define SONIC_CRDA 0x0e
66 #define SONIC_CRBA0 0x0f
67 #define SONIC_CRBA1 0x10
68 #define SONIC_RBWC0 0x11
69 #define SONIC_RBWC1 0x12
70 #define SONIC_EOBC 0x13
71 #define SONIC_URRA 0x14
72 #define SONIC_RSA 0x15
73 #define SONIC_REA 0x16
74 #define SONIC_RRP 0x17
75 #define SONIC_RWP 0x18
76 #define SONIC_TRBA0 0x19
77 #define SONIC_TRBA1 0x1a
78 #define SONIC_LLFA 0x1f
79 #define SONIC_TTDA 0x20
80 #define SONIC_CEP 0x21
81 #define SONIC_CAP2 0x22
82 #define SONIC_CAP1 0x23
83 #define SONIC_CAP0 0x24
84 #define SONIC_CE 0x25
85 #define SONIC_CDP 0x26
86 #define SONIC_CDC 0x27
87 #define SONIC_SR 0x28
88 #define SONIC_WT0 0x29
89 #define SONIC_WT1 0x2a
90 #define SONIC_RSC 0x2b
91 #define SONIC_CRCT 0x2c
92 #define SONIC_FAET 0x2d
93 #define SONIC_MPT 0x2e
94 #define SONIC_MDT 0x2f
95 #define SONIC_DCR2 0x3f
96
97 #define SONIC_CR_HTX 0x0001
98 #define SONIC_CR_TXP 0x0002
99 #define SONIC_CR_RXDIS 0x0004
100 #define SONIC_CR_RXEN 0x0008
101 #define SONIC_CR_STP 0x0010
102 #define SONIC_CR_ST 0x0020
103 #define SONIC_CR_RST 0x0080
104 #define SONIC_CR_RRRA 0x0100
105 #define SONIC_CR_LCAM 0x0200
106 #define SONIC_CR_MASK 0x03bf
107
108 #define SONIC_DCR_DW 0x0020
109 #define SONIC_DCR_LBR 0x2000
110 #define SONIC_DCR_EXBUS 0x8000
111
112 #define SONIC_RCR_PRX 0x0001
113 #define SONIC_RCR_LBK 0x0002
114 #define SONIC_RCR_FAER 0x0004
115 #define SONIC_RCR_CRCR 0x0008
116 #define SONIC_RCR_CRS 0x0020
117 #define SONIC_RCR_LPKT 0x0040
118 #define SONIC_RCR_BC 0x0080
119 #define SONIC_RCR_MC 0x0100
120 #define SONIC_RCR_LB0 0x0200
121 #define SONIC_RCR_LB1 0x0400
122 #define SONIC_RCR_AMC 0x0800
123 #define SONIC_RCR_PRO 0x1000
124 #define SONIC_RCR_BRD 0x2000
125 #define SONIC_RCR_RNT 0x4000
126
127 #define SONIC_TCR_PTX 0x0001
128 #define SONIC_TCR_BCM 0x0002
129 #define SONIC_TCR_FU 0x0004
130 #define SONIC_TCR_EXC 0x0040
131 #define SONIC_TCR_CRSL 0x0080
132 #define SONIC_TCR_NCRS 0x0100
133 #define SONIC_TCR_EXD 0x0400
134 #define SONIC_TCR_CRCI 0x2000
135 #define SONIC_TCR_PINT 0x8000
136
137 #define SONIC_ISR_RBE 0x0020
138 #define SONIC_ISR_RDE 0x0040
139 #define SONIC_ISR_TC 0x0080
140 #define SONIC_ISR_TXDN 0x0200
141 #define SONIC_ISR_PKTRX 0x0400
142 #define SONIC_ISR_PINT 0x0800
143 #define SONIC_ISR_LCD 0x1000
144
145 #define TYPE_DP8393X "dp8393x"
146 #define DP8393X(obj) OBJECT_CHECK(dp8393xState, (obj), TYPE_DP8393X)
147
148 typedef struct dp8393xState {
149 SysBusDevice parent_obj;
150
151 /* Hardware */
152 uint8_t it_shift;
153 qemu_irq irq;
154 #ifdef DEBUG_SONIC
155 int irq_level;
156 #endif
157 QEMUTimer *watchdog;
158 int64_t wt_last_update;
159 NICConf conf;
160 NICState *nic;
161 MemoryRegion mmio;
162 MemoryRegion prom;
163
164 /* Registers */
165 uint8_t cam[16][6];
166 uint16_t regs[0x40];
167
168 /* Temporaries */
169 uint8_t tx_buffer[0x10000];
170 int loopback_packet;
171
172 /* Memory access */
173 void *dma_mr;
174 AddressSpace as;
175 } dp8393xState;
176
177 static void dp8393x_update_irq(dp8393xState *s)
178 {
179 int level = (s->regs[SONIC_IMR] & s->regs[SONIC_ISR]) ? 1 : 0;
180
181 #ifdef DEBUG_SONIC
182 if (level != s->irq_level) {
183 s->irq_level = level;
184 if (level) {
185 DPRINTF("raise irq, isr is 0x%04x\n", s->regs[SONIC_ISR]);
186 } else {
187 DPRINTF("lower irq\n");
188 }
189 }
190 #endif
191
192 qemu_set_irq(s->irq, level);
193 }
194
195 static void dp8393x_do_load_cam(dp8393xState *s)
196 {
197 uint16_t data[8];
198 int width, size;
199 uint16_t index = 0;
200
201 width = (s->regs[SONIC_DCR] & SONIC_DCR_DW) ? 2 : 1;
202 size = sizeof(uint16_t) * 4 * width;
203
204 while (s->regs[SONIC_CDC] & 0x1f) {
205 /* Fill current entry */
206 address_space_rw(&s->as,
207 (s->regs[SONIC_URRA] << 16) | s->regs[SONIC_CDP],
208 MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, size, 0);
209 s->cam[index][0] = data[1 * width] & 0xff;
210 s->cam[index][1] = data[1 * width] >> 8;
211 s->cam[index][2] = data[2 * width] & 0xff;
212 s->cam[index][3] = data[2 * width] >> 8;
213 s->cam[index][4] = data[3 * width] & 0xff;
214 s->cam[index][5] = data[3 * width] >> 8;
215 DPRINTF("load cam[%d] with %02x%02x%02x%02x%02x%02x\n", index,
216 s->cam[index][0], s->cam[index][1], s->cam[index][2],
217 s->cam[index][3], s->cam[index][4], s->cam[index][5]);
218 /* Move to next entry */
219 s->regs[SONIC_CDC]--;
220 s->regs[SONIC_CDP] += size;
221 index++;
222 }
223
224 /* Read CAM enable */
225 address_space_rw(&s->as,
226 (s->regs[SONIC_URRA] << 16) | s->regs[SONIC_CDP],
227 MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, size, 0);
228 s->regs[SONIC_CE] = data[0 * width];
229 DPRINTF("load cam done. cam enable mask 0x%04x\n", s->regs[SONIC_CE]);
230
231 /* Done */
232 s->regs[SONIC_CR] &= ~SONIC_CR_LCAM;
233 s->regs[SONIC_ISR] |= SONIC_ISR_LCD;
234 dp8393x_update_irq(s);
235 }
236
237 static void dp8393x_do_read_rra(dp8393xState *s)
238 {
239 uint16_t data[8];
240 int width, size;
241
242 /* Read memory */
243 width = (s->regs[SONIC_DCR] & SONIC_DCR_DW) ? 2 : 1;
244 size = sizeof(uint16_t) * 4 * width;
245 address_space_rw(&s->as,
246 (s->regs[SONIC_URRA] << 16) | s->regs[SONIC_RRP],
247 MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, size, 0);
248
249 /* Update SONIC registers */
250 s->regs[SONIC_CRBA0] = data[0 * width];
251 s->regs[SONIC_CRBA1] = data[1 * width];
252 s->regs[SONIC_RBWC0] = data[2 * width];
253 s->regs[SONIC_RBWC1] = data[3 * width];
254 DPRINTF("CRBA0/1: 0x%04x/0x%04x, RBWC0/1: 0x%04x/0x%04x\n",
255 s->regs[SONIC_CRBA0], s->regs[SONIC_CRBA1],
256 s->regs[SONIC_RBWC0], s->regs[SONIC_RBWC1]);
257
258 /* Go to next entry */
259 s->regs[SONIC_RRP] += size;
260
261 /* Handle wrap */
262 if (s->regs[SONIC_RRP] == s->regs[SONIC_REA]) {
263 s->regs[SONIC_RRP] = s->regs[SONIC_RSA];
264 }
265
266 /* Check resource exhaustion */
267 if (s->regs[SONIC_RRP] == s->regs[SONIC_RWP])
268 {
269 s->regs[SONIC_ISR] |= SONIC_ISR_RBE;
270 dp8393x_update_irq(s);
271 }
272
273 /* Done */
274 s->regs[SONIC_CR] &= ~SONIC_CR_RRRA;
275 }
276
277 static void dp8393x_do_software_reset(dp8393xState *s)
278 {
279 timer_del(s->watchdog);
280
281 s->regs[SONIC_CR] &= ~(SONIC_CR_LCAM | SONIC_CR_RRRA | SONIC_CR_TXP | SONIC_CR_HTX);
282 s->regs[SONIC_CR] |= SONIC_CR_RST | SONIC_CR_RXDIS;
283 }
284
285 static void dp8393x_set_next_tick(dp8393xState *s)
286 {
287 uint32_t ticks;
288 int64_t delay;
289
290 if (s->regs[SONIC_CR] & SONIC_CR_STP) {
291 timer_del(s->watchdog);
292 return;
293 }
294
295 ticks = s->regs[SONIC_WT1] << 16 | s->regs[SONIC_WT0];
296 s->wt_last_update = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
297 delay = NANOSECONDS_PER_SECOND * ticks / 5000000;
298 timer_mod(s->watchdog, s->wt_last_update + delay);
299 }
300
301 static void dp8393x_update_wt_regs(dp8393xState *s)
302 {
303 int64_t elapsed;
304 uint32_t val;
305
306 if (s->regs[SONIC_CR] & SONIC_CR_STP) {
307 timer_del(s->watchdog);
308 return;
309 }
310
311 elapsed = s->wt_last_update - qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
312 val = s->regs[SONIC_WT1] << 16 | s->regs[SONIC_WT0];
313 val -= elapsed / 5000000;
314 s->regs[SONIC_WT1] = (val >> 16) & 0xffff;
315 s->regs[SONIC_WT0] = (val >> 0) & 0xffff;
316 dp8393x_set_next_tick(s);
317
318 }
319
320 static void dp8393x_do_start_timer(dp8393xState *s)
321 {
322 s->regs[SONIC_CR] &= ~SONIC_CR_STP;
323 dp8393x_set_next_tick(s);
324 }
325
326 static void dp8393x_do_stop_timer(dp8393xState *s)
327 {
328 s->regs[SONIC_CR] &= ~SONIC_CR_ST;
329 dp8393x_update_wt_regs(s);
330 }
331
332 static int dp8393x_can_receive(NetClientState *nc);
333
334 static void dp8393x_do_receiver_enable(dp8393xState *s)
335 {
336 s->regs[SONIC_CR] &= ~SONIC_CR_RXDIS;
337 if (dp8393x_can_receive(s->nic->ncs)) {
338 qemu_flush_queued_packets(qemu_get_queue(s->nic));
339 }
340 }
341
342 static void dp8393x_do_receiver_disable(dp8393xState *s)
343 {
344 s->regs[SONIC_CR] &= ~SONIC_CR_RXEN;
345 }
346
347 static void dp8393x_do_transmit_packets(dp8393xState *s)
348 {
349 NetClientState *nc = qemu_get_queue(s->nic);
350 uint16_t data[12];
351 int width, size;
352 int tx_len, len;
353 uint16_t i;
354
355 width = (s->regs[SONIC_DCR] & SONIC_DCR_DW) ? 2 : 1;
356
357 while (1) {
358 /* Read memory */
359 DPRINTF("Transmit packet at %08x\n",
360 (s->regs[SONIC_UTDA] << 16) | s->regs[SONIC_CTDA]);
361 size = sizeof(uint16_t) * 6 * width;
362 s->regs[SONIC_TTDA] = s->regs[SONIC_CTDA];
363 address_space_rw(&s->as,
364 ((s->regs[SONIC_UTDA] << 16) | s->regs[SONIC_TTDA]) + sizeof(uint16_t) * width,
365 MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, size, 0);
366 tx_len = 0;
367
368 /* Update registers */
369 s->regs[SONIC_TCR] = data[0 * width] & 0xf000;
370 s->regs[SONIC_TPS] = data[1 * width];
371 s->regs[SONIC_TFC] = data[2 * width];
372 s->regs[SONIC_TSA0] = data[3 * width];
373 s->regs[SONIC_TSA1] = data[4 * width];
374 s->regs[SONIC_TFS] = data[5 * width];
375
376 /* Handle programmable interrupt */
377 if (s->regs[SONIC_TCR] & SONIC_TCR_PINT) {
378 s->regs[SONIC_ISR] |= SONIC_ISR_PINT;
379 } else {
380 s->regs[SONIC_ISR] &= ~SONIC_ISR_PINT;
381 }
382
383 for (i = 0; i < s->regs[SONIC_TFC]; ) {
384 /* Append fragment */
385 len = s->regs[SONIC_TFS];
386 if (tx_len + len > sizeof(s->tx_buffer)) {
387 len = sizeof(s->tx_buffer) - tx_len;
388 }
389 address_space_rw(&s->as,
390 (s->regs[SONIC_TSA1] << 16) | s->regs[SONIC_TSA0],
391 MEMTXATTRS_UNSPECIFIED, &s->tx_buffer[tx_len], len, 0);
392 tx_len += len;
393
394 i++;
395 if (i != s->regs[SONIC_TFC]) {
396 /* Read next fragment details */
397 size = sizeof(uint16_t) * 3 * width;
398 address_space_rw(&s->as,
399 ((s->regs[SONIC_UTDA] << 16) | s->regs[SONIC_TTDA]) + sizeof(uint16_t) * (4 + 3 * i) * width,
400 MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, size, 0);
401 s->regs[SONIC_TSA0] = data[0 * width];
402 s->regs[SONIC_TSA1] = data[1 * width];
403 s->regs[SONIC_TFS] = data[2 * width];
404 }
405 }
406
407 /* Handle Ethernet checksum */
408 if (!(s->regs[SONIC_TCR] & SONIC_TCR_CRCI)) {
409 /* Don't append FCS there, to look like slirp packets
410 * which don't have one */
411 } else {
412 /* Remove existing FCS */
413 tx_len -= 4;
414 }
415
416 if (s->regs[SONIC_RCR] & (SONIC_RCR_LB1 | SONIC_RCR_LB0)) {
417 /* Loopback */
418 s->regs[SONIC_TCR] |= SONIC_TCR_CRSL;
419 if (nc->info->can_receive(nc)) {
420 s->loopback_packet = 1;
421 nc->info->receive(nc, s->tx_buffer, tx_len);
422 }
423 } else {
424 /* Transmit packet */
425 qemu_send_packet(nc, s->tx_buffer, tx_len);
426 }
427 s->regs[SONIC_TCR] |= SONIC_TCR_PTX;
428
429 /* Write status */
430 data[0 * width] = s->regs[SONIC_TCR] & 0x0fff; /* status */
431 size = sizeof(uint16_t) * width;
432 address_space_rw(&s->as,
433 (s->regs[SONIC_UTDA] << 16) | s->regs[SONIC_TTDA],
434 MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, size, 1);
435
436 if (!(s->regs[SONIC_CR] & SONIC_CR_HTX)) {
437 /* Read footer of packet */
438 size = sizeof(uint16_t) * width;
439 address_space_rw(&s->as,
440 ((s->regs[SONIC_UTDA] << 16) | s->regs[SONIC_TTDA]) + sizeof(uint16_t) * (4 + 3 * s->regs[SONIC_TFC]) * width,
441 MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, size, 0);
442 s->regs[SONIC_CTDA] = data[0 * width] & ~0x1;
443 if (data[0 * width] & 0x1) {
444 /* EOL detected */
445 break;
446 }
447 }
448 }
449
450 /* Done */
451 s->regs[SONIC_CR] &= ~SONIC_CR_TXP;
452 s->regs[SONIC_ISR] |= SONIC_ISR_TXDN;
453 dp8393x_update_irq(s);
454 }
455
456 static void dp8393x_do_halt_transmission(dp8393xState *s)
457 {
458 /* Nothing to do */
459 }
460
461 static void dp8393x_do_command(dp8393xState *s, uint16_t command)
462 {
463 if ((s->regs[SONIC_CR] & SONIC_CR_RST) && !(command & SONIC_CR_RST)) {
464 s->regs[SONIC_CR] &= ~SONIC_CR_RST;
465 return;
466 }
467
468 s->regs[SONIC_CR] |= (command & SONIC_CR_MASK);
469
470 if (command & SONIC_CR_HTX)
471 dp8393x_do_halt_transmission(s);
472 if (command & SONIC_CR_TXP)
473 dp8393x_do_transmit_packets(s);
474 if (command & SONIC_CR_RXDIS)
475 dp8393x_do_receiver_disable(s);
476 if (command & SONIC_CR_RXEN)
477 dp8393x_do_receiver_enable(s);
478 if (command & SONIC_CR_STP)
479 dp8393x_do_stop_timer(s);
480 if (command & SONIC_CR_ST)
481 dp8393x_do_start_timer(s);
482 if (command & SONIC_CR_RST)
483 dp8393x_do_software_reset(s);
484 if (command & SONIC_CR_RRRA)
485 dp8393x_do_read_rra(s);
486 if (command & SONIC_CR_LCAM)
487 dp8393x_do_load_cam(s);
488 }
489
490 static uint64_t dp8393x_read(void *opaque, hwaddr addr, unsigned int size)
491 {
492 dp8393xState *s = opaque;
493 int reg = addr >> s->it_shift;
494 uint16_t val = 0;
495
496 switch (reg) {
497 /* Update data before reading it */
498 case SONIC_WT0:
499 case SONIC_WT1:
500 dp8393x_update_wt_regs(s);
501 val = s->regs[reg];
502 break;
503 /* Accept read to some registers only when in reset mode */
504 case SONIC_CAP2:
505 case SONIC_CAP1:
506 case SONIC_CAP0:
507 if (s->regs[SONIC_CR] & SONIC_CR_RST) {
508 val = s->cam[s->regs[SONIC_CEP] & 0xf][2* (SONIC_CAP0 - reg) + 1] << 8;
509 val |= s->cam[s->regs[SONIC_CEP] & 0xf][2* (SONIC_CAP0 - reg)];
510 }
511 break;
512 /* All other registers have no special contrainst */
513 default:
514 val = s->regs[reg];
515 }
516
517 DPRINTF("read 0x%04x from reg %s\n", val, reg_names[reg]);
518
519 return val;
520 }
521
522 static void dp8393x_write(void *opaque, hwaddr addr, uint64_t data,
523 unsigned int size)
524 {
525 dp8393xState *s = opaque;
526 int reg = addr >> s->it_shift;
527
528 DPRINTF("write 0x%04x to reg %s\n", (uint16_t)data, reg_names[reg]);
529
530 switch (reg) {
531 /* Command register */
532 case SONIC_CR:
533 dp8393x_do_command(s, data);
534 break;
535 /* Prevent write to read-only registers */
536 case SONIC_CAP2:
537 case SONIC_CAP1:
538 case SONIC_CAP0:
539 case SONIC_SR:
540 case SONIC_MDT:
541 DPRINTF("writing to reg %d invalid\n", reg);
542 break;
543 /* Accept write to some registers only when in reset mode */
544 case SONIC_DCR:
545 if (s->regs[SONIC_CR] & SONIC_CR_RST) {
546 s->regs[reg] = data & 0xbfff;
547 } else {
548 DPRINTF("writing to DCR invalid\n");
549 }
550 break;
551 case SONIC_DCR2:
552 if (s->regs[SONIC_CR] & SONIC_CR_RST) {
553 s->regs[reg] = data & 0xf017;
554 } else {
555 DPRINTF("writing to DCR2 invalid\n");
556 }
557 break;
558 /* 12 lower bytes are Read Only */
559 case SONIC_TCR:
560 s->regs[reg] = data & 0xf000;
561 break;
562 /* 9 lower bytes are Read Only */
563 case SONIC_RCR:
564 s->regs[reg] = data & 0xffe0;
565 break;
566 /* Ignore most significant bit */
567 case SONIC_IMR:
568 s->regs[reg] = data & 0x7fff;
569 dp8393x_update_irq(s);
570 break;
571 /* Clear bits by writing 1 to them */
572 case SONIC_ISR:
573 data &= s->regs[reg];
574 s->regs[reg] &= ~data;
575 if (data & SONIC_ISR_RBE) {
576 dp8393x_do_read_rra(s);
577 }
578 dp8393x_update_irq(s);
579 if (dp8393x_can_receive(s->nic->ncs)) {
580 qemu_flush_queued_packets(qemu_get_queue(s->nic));
581 }
582 break;
583 /* Ignore least significant bit */
584 case SONIC_RSA:
585 case SONIC_REA:
586 case SONIC_RRP:
587 case SONIC_RWP:
588 s->regs[reg] = data & 0xfffe;
589 break;
590 /* Invert written value for some registers */
591 case SONIC_CRCT:
592 case SONIC_FAET:
593 case SONIC_MPT:
594 s->regs[reg] = data ^ 0xffff;
595 break;
596 /* All other registers have no special contrainst */
597 default:
598 s->regs[reg] = data;
599 }
600
601 if (reg == SONIC_WT0 || reg == SONIC_WT1) {
602 dp8393x_set_next_tick(s);
603 }
604 }
605
606 static const MemoryRegionOps dp8393x_ops = {
607 .read = dp8393x_read,
608 .write = dp8393x_write,
609 .impl.min_access_size = 2,
610 .impl.max_access_size = 2,
611 .endianness = DEVICE_NATIVE_ENDIAN,
612 };
613
614 static void dp8393x_watchdog(void *opaque)
615 {
616 dp8393xState *s = opaque;
617
618 if (s->regs[SONIC_CR] & SONIC_CR_STP) {
619 return;
620 }
621
622 s->regs[SONIC_WT1] = 0xffff;
623 s->regs[SONIC_WT0] = 0xffff;
624 dp8393x_set_next_tick(s);
625
626 /* Signal underflow */
627 s->regs[SONIC_ISR] |= SONIC_ISR_TC;
628 dp8393x_update_irq(s);
629 }
630
631 static int dp8393x_can_receive(NetClientState *nc)
632 {
633 dp8393xState *s = qemu_get_nic_opaque(nc);
634
635 if (!(s->regs[SONIC_CR] & SONIC_CR_RXEN))
636 return 0;
637 if (s->regs[SONIC_ISR] & SONIC_ISR_RBE)
638 return 0;
639 return 1;
640 }
641
642 static int dp8393x_receive_filter(dp8393xState *s, const uint8_t * buf,
643 int size)
644 {
645 static const uint8_t bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
646 int i;
647
648 /* Check promiscuous mode */
649 if ((s->regs[SONIC_RCR] & SONIC_RCR_PRO) && (buf[0] & 1) == 0) {
650 return 0;
651 }
652
653 /* Check multicast packets */
654 if ((s->regs[SONIC_RCR] & SONIC_RCR_AMC) && (buf[0] & 1) == 1) {
655 return SONIC_RCR_MC;
656 }
657
658 /* Check broadcast */
659 if ((s->regs[SONIC_RCR] & SONIC_RCR_BRD) && !memcmp(buf, bcast, sizeof(bcast))) {
660 return SONIC_RCR_BC;
661 }
662
663 /* Check CAM */
664 for (i = 0; i < 16; i++) {
665 if (s->regs[SONIC_CE] & (1 << i)) {
666 /* Entry enabled */
667 if (!memcmp(buf, s->cam[i], sizeof(s->cam[i]))) {
668 return 0;
669 }
670 }
671 }
672
673 return -1;
674 }
675
676 static ssize_t dp8393x_receive(NetClientState *nc, const uint8_t * buf,
677 size_t size)
678 {
679 dp8393xState *s = qemu_get_nic_opaque(nc);
680 uint16_t data[10];
681 int packet_type;
682 uint32_t available, address;
683 int width, rx_len = size;
684 uint32_t checksum;
685
686 width = (s->regs[SONIC_DCR] & SONIC_DCR_DW) ? 2 : 1;
687
688 s->regs[SONIC_RCR] &= ~(SONIC_RCR_PRX | SONIC_RCR_LBK | SONIC_RCR_FAER |
689 SONIC_RCR_CRCR | SONIC_RCR_LPKT | SONIC_RCR_BC | SONIC_RCR_MC);
690
691 packet_type = dp8393x_receive_filter(s, buf, size);
692 if (packet_type < 0) {
693 DPRINTF("packet not for netcard\n");
694 return -1;
695 }
696
697 /* XXX: Check byte ordering */
698
699 /* Check for EOL */
700 if (s->regs[SONIC_LLFA] & 0x1) {
701 /* Are we still in resource exhaustion? */
702 size = sizeof(uint16_t) * 1 * width;
703 address = ((s->regs[SONIC_URDA] << 16) | s->regs[SONIC_CRDA]) + sizeof(uint16_t) * 5 * width;
704 address_space_rw(&s->as, address, MEMTXATTRS_UNSPECIFIED,
705 (uint8_t *)data, size, 0);
706 if (data[0 * width] & 0x1) {
707 /* Still EOL ; stop reception */
708 return -1;
709 } else {
710 s->regs[SONIC_CRDA] = s->regs[SONIC_LLFA];
711 }
712 }
713
714 /* Save current position */
715 s->regs[SONIC_TRBA1] = s->regs[SONIC_CRBA1];
716 s->regs[SONIC_TRBA0] = s->regs[SONIC_CRBA0];
717
718 /* Calculate the ethernet checksum */
719 checksum = cpu_to_le32(crc32(0, buf, rx_len));
720
721 /* Put packet into RBA */
722 DPRINTF("Receive packet at %08x\n", (s->regs[SONIC_CRBA1] << 16) | s->regs[SONIC_CRBA0]);
723 address = (s->regs[SONIC_CRBA1] << 16) | s->regs[SONIC_CRBA0];
724 address_space_rw(&s->as, address,
725 MEMTXATTRS_UNSPECIFIED, (uint8_t *)buf, rx_len, 1);
726 address += rx_len;
727 address_space_rw(&s->as, address,
728 MEMTXATTRS_UNSPECIFIED, (uint8_t *)&checksum, 4, 1);
729 rx_len += 4;
730 s->regs[SONIC_CRBA1] = address >> 16;
731 s->regs[SONIC_CRBA0] = address & 0xffff;
732 available = (s->regs[SONIC_RBWC1] << 16) | s->regs[SONIC_RBWC0];
733 available -= rx_len / 2;
734 s->regs[SONIC_RBWC1] = available >> 16;
735 s->regs[SONIC_RBWC0] = available & 0xffff;
736
737 /* Update status */
738 if (((s->regs[SONIC_RBWC1] << 16) | s->regs[SONIC_RBWC0]) < s->regs[SONIC_EOBC]) {
739 s->regs[SONIC_RCR] |= SONIC_RCR_LPKT;
740 }
741 s->regs[SONIC_RCR] |= packet_type;
742 s->regs[SONIC_RCR] |= SONIC_RCR_PRX;
743 if (s->loopback_packet) {
744 s->regs[SONIC_RCR] |= SONIC_RCR_LBK;
745 s->loopback_packet = 0;
746 }
747
748 /* Write status to memory */
749 DPRINTF("Write status at %08x\n", (s->regs[SONIC_URDA] << 16) | s->regs[SONIC_CRDA]);
750 data[0 * width] = s->regs[SONIC_RCR]; /* status */
751 data[1 * width] = rx_len; /* byte count */
752 data[2 * width] = s->regs[SONIC_TRBA0]; /* pkt_ptr0 */
753 data[3 * width] = s->regs[SONIC_TRBA1]; /* pkt_ptr1 */
754 data[4 * width] = s->regs[SONIC_RSC]; /* seq_no */
755 size = sizeof(uint16_t) * 5 * width;
756 address_space_rw(&s->as, (s->regs[SONIC_URDA] << 16) | s->regs[SONIC_CRDA],
757 MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, size, 1);
758
759 /* Move to next descriptor */
760 size = sizeof(uint16_t) * width;
761 address_space_rw(&s->as,
762 ((s->regs[SONIC_URDA] << 16) | s->regs[SONIC_CRDA]) + sizeof(uint16_t) * 5 * width,
763 MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, size, 0);
764 s->regs[SONIC_LLFA] = data[0 * width];
765 if (s->regs[SONIC_LLFA] & 0x1) {
766 /* EOL detected */
767 s->regs[SONIC_ISR] |= SONIC_ISR_RDE;
768 } else {
769 data[0 * width] = 0; /* in_use */
770 address_space_rw(&s->as,
771 ((s->regs[SONIC_URDA] << 16) | s->regs[SONIC_CRDA]) + sizeof(uint16_t) * 6 * width,
772 MEMTXATTRS_UNSPECIFIED, (uint8_t *)data, sizeof(uint16_t), 1);
773 s->regs[SONIC_CRDA] = s->regs[SONIC_LLFA];
774 s->regs[SONIC_ISR] |= SONIC_ISR_PKTRX;
775 s->regs[SONIC_RSC] = (s->regs[SONIC_RSC] & 0xff00) | (((s->regs[SONIC_RSC] & 0x00ff) + 1) & 0x00ff);
776
777 if (s->regs[SONIC_RCR] & SONIC_RCR_LPKT) {
778 /* Read next RRA */
779 dp8393x_do_read_rra(s);
780 }
781 }
782
783 /* Done */
784 dp8393x_update_irq(s);
785
786 return size;
787 }
788
789 static void dp8393x_reset(DeviceState *dev)
790 {
791 dp8393xState *s = DP8393X(dev);
792 timer_del(s->watchdog);
793
794 memset(s->regs, 0, sizeof(s->regs));
795 s->regs[SONIC_CR] = SONIC_CR_RST | SONIC_CR_STP | SONIC_CR_RXDIS;
796 s->regs[SONIC_DCR] &= ~(SONIC_DCR_EXBUS | SONIC_DCR_LBR);
797 s->regs[SONIC_RCR] &= ~(SONIC_RCR_LB0 | SONIC_RCR_LB1 | SONIC_RCR_BRD | SONIC_RCR_RNT);
798 s->regs[SONIC_TCR] |= SONIC_TCR_NCRS | SONIC_TCR_PTX;
799 s->regs[SONIC_TCR] &= ~SONIC_TCR_BCM;
800 s->regs[SONIC_IMR] = 0;
801 s->regs[SONIC_ISR] = 0;
802 s->regs[SONIC_DCR2] = 0;
803 s->regs[SONIC_EOBC] = 0x02F8;
804 s->regs[SONIC_RSC] = 0;
805 s->regs[SONIC_CE] = 0;
806 s->regs[SONIC_RSC] = 0;
807
808 /* Network cable is connected */
809 s->regs[SONIC_RCR] |= SONIC_RCR_CRS;
810
811 dp8393x_update_irq(s);
812 }
813
814 static NetClientInfo net_dp83932_info = {
815 .type = NET_CLIENT_OPTIONS_KIND_NIC,
816 .size = sizeof(NICState),
817 .can_receive = dp8393x_can_receive,
818 .receive = dp8393x_receive,
819 };
820
821 static void dp8393x_instance_init(Object *obj)
822 {
823 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
824 dp8393xState *s = DP8393X(obj);
825
826 sysbus_init_mmio(sbd, &s->mmio);
827 sysbus_init_mmio(sbd, &s->prom);
828 sysbus_init_irq(sbd, &s->irq);
829 }
830
831 static void dp8393x_realize(DeviceState *dev, Error **errp)
832 {
833 dp8393xState *s = DP8393X(dev);
834 int i, checksum;
835 uint8_t *prom;
836 Error *local_err = NULL;
837
838 address_space_init(&s->as, s->dma_mr, "dp8393x");
839 memory_region_init_io(&s->mmio, OBJECT(dev), &dp8393x_ops, s,
840 "dp8393x-regs", 0x40 << s->it_shift);
841
842 s->nic = qemu_new_nic(&net_dp83932_info, &s->conf,
843 object_get_typename(OBJECT(dev)), dev->id, s);
844 qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
845
846 s->watchdog = timer_new_ns(QEMU_CLOCK_VIRTUAL, dp8393x_watchdog, s);
847 s->regs[SONIC_SR] = 0x0004; /* only revision recognized by Linux */
848
849 memory_region_init_ram(&s->prom, OBJECT(dev),
850 "dp8393x-prom", SONIC_PROM_SIZE, &local_err);
851 if (local_err) {
852 error_propagate(errp, local_err);
853 return;
854 }
855 memory_region_set_readonly(&s->prom, true);
856 prom = memory_region_get_ram_ptr(&s->prom);
857 checksum = 0;
858 for (i = 0; i < 6; i++) {
859 prom[i] = s->conf.macaddr.a[i];
860 checksum += prom[i];
861 if (checksum > 0xff) {
862 checksum = (checksum + 1) & 0xff;
863 }
864 }
865 prom[7] = 0xff - checksum;
866 }
867
868 static const VMStateDescription vmstate_dp8393x = {
869 .name = "dp8393x",
870 .version_id = 0,
871 .minimum_version_id = 0,
872 .fields = (VMStateField []) {
873 VMSTATE_BUFFER_UNSAFE(cam, dp8393xState, 0, 16 * 6),
874 VMSTATE_UINT16_ARRAY(regs, dp8393xState, 0x40),
875 VMSTATE_END_OF_LIST()
876 }
877 };
878
879 static Property dp8393x_properties[] = {
880 DEFINE_NIC_PROPERTIES(dp8393xState, conf),
881 DEFINE_PROP_PTR("dma_mr", dp8393xState, dma_mr),
882 DEFINE_PROP_UINT8("it_shift", dp8393xState, it_shift, 0),
883 DEFINE_PROP_END_OF_LIST(),
884 };
885
886 static void dp8393x_class_init(ObjectClass *klass, void *data)
887 {
888 DeviceClass *dc = DEVICE_CLASS(klass);
889
890 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
891 dc->realize = dp8393x_realize;
892 dc->reset = dp8393x_reset;
893 dc->vmsd = &vmstate_dp8393x;
894 dc->props = dp8393x_properties;
895 /* Reason: dma_mr property can't be set */
896 dc->cannot_instantiate_with_device_add_yet = true;
897 }
898
899 static const TypeInfo dp8393x_info = {
900 .name = TYPE_DP8393X,
901 .parent = TYPE_SYS_BUS_DEVICE,
902 .instance_size = sizeof(dp8393xState),
903 .instance_init = dp8393x_instance_init,
904 .class_init = dp8393x_class_init,
905 };
906
907 static void dp8393x_register_types(void)
908 {
909 type_register_static(&dp8393x_info);
910 }
911
912 type_init(dp8393x_register_types)
QEmu