?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
exec/memory: Use struct Object typedef
[qemu/ar7.git] / hw / net / allwinner-sun8i-emac.c
blobbf91803d65a8729f4f67bd49ce9b601365eb52cf
1 /*
2 * Allwinner Sun8i Ethernet MAC emulation
3 *
4 * Copyright (C) 2019 Niek Linnenbank <nieklinnenbank@gmail.com>
5 *
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 2 of the License, or
9 * (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
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "qemu/osdep.h"
21 #include "qemu/units.h"
22 #include "qapi/error.h"
23 #include "hw/sysbus.h"
24 #include "migration/vmstate.h"
25 #include "net/net.h"
26 #include "hw/irq.h"
27 #include "hw/qdev-properties.h"
28 #include "qemu/log.h"
29 #include "trace.h"
30 #include "net/checksum.h"
31 #include "qemu/module.h"
32 #include "exec/cpu-common.h"
33 #include "sysemu/dma.h"
34 #include "hw/net/allwinner-sun8i-emac.h"
35
36 /* EMAC register offsets */
37 enum {
38 REG_BASIC_CTL_0 = 0x0000, /* Basic Control 0 */
39 REG_BASIC_CTL_1 = 0x0004, /* Basic Control 1 */
40 REG_INT_STA = 0x0008, /* Interrupt Status */
41 REG_INT_EN = 0x000C, /* Interrupt Enable */
42 REG_TX_CTL_0 = 0x0010, /* Transmit Control 0 */
43 REG_TX_CTL_1 = 0x0014, /* Transmit Control 1 */
44 REG_TX_FLOW_CTL = 0x001C, /* Transmit Flow Control */
45 REG_TX_DMA_DESC_LIST = 0x0020, /* Transmit Descriptor List Address */
46 REG_RX_CTL_0 = 0x0024, /* Receive Control 0 */
47 REG_RX_CTL_1 = 0x0028, /* Receive Control 1 */
48 REG_RX_DMA_DESC_LIST = 0x0034, /* Receive Descriptor List Address */
49 REG_FRM_FLT = 0x0038, /* Receive Frame Filter */
50 REG_RX_HASH_0 = 0x0040, /* Receive Hash Table 0 */
51 REG_RX_HASH_1 = 0x0044, /* Receive Hash Table 1 */
52 REG_MII_CMD = 0x0048, /* Management Interface Command */
53 REG_MII_DATA = 0x004C, /* Management Interface Data */
54 REG_ADDR_HIGH = 0x0050, /* MAC Address High */
55 REG_ADDR_LOW = 0x0054, /* MAC Address Low */
56 REG_TX_DMA_STA = 0x00B0, /* Transmit DMA Status */
57 REG_TX_CUR_DESC = 0x00B4, /* Transmit Current Descriptor */
58 REG_TX_CUR_BUF = 0x00B8, /* Transmit Current Buffer */
59 REG_RX_DMA_STA = 0x00C0, /* Receive DMA Status */
60 REG_RX_CUR_DESC = 0x00C4, /* Receive Current Descriptor */
61 REG_RX_CUR_BUF = 0x00C8, /* Receive Current Buffer */
62 REG_RGMII_STA = 0x00D0, /* RGMII Status */
63 };
64
65 /* EMAC register flags */
66 enum {
67 BASIC_CTL0_100Mbps = (0b11 << 2),
68 BASIC_CTL0_FD = (1 << 0),
69 BASIC_CTL1_SOFTRST = (1 << 0),
70 };
71
72 enum {
73 INT_STA_RGMII_LINK = (1 << 16),
74 INT_STA_RX_EARLY = (1 << 13),
75 INT_STA_RX_OVERFLOW = (1 << 12),
76 INT_STA_RX_TIMEOUT = (1 << 11),
77 INT_STA_RX_DMA_STOP = (1 << 10),
78 INT_STA_RX_BUF_UA = (1 << 9),
79 INT_STA_RX = (1 << 8),
80 INT_STA_TX_EARLY = (1 << 5),
81 INT_STA_TX_UNDERFLOW = (1 << 4),
82 INT_STA_TX_TIMEOUT = (1 << 3),
83 INT_STA_TX_BUF_UA = (1 << 2),
84 INT_STA_TX_DMA_STOP = (1 << 1),
85 INT_STA_TX = (1 << 0),
86 };
87
88 enum {
89 INT_EN_RX_EARLY = (1 << 13),
90 INT_EN_RX_OVERFLOW = (1 << 12),
91 INT_EN_RX_TIMEOUT = (1 << 11),
92 INT_EN_RX_DMA_STOP = (1 << 10),
93 INT_EN_RX_BUF_UA = (1 << 9),
94 INT_EN_RX = (1 << 8),
95 INT_EN_TX_EARLY = (1 << 5),
96 INT_EN_TX_UNDERFLOW = (1 << 4),
97 INT_EN_TX_TIMEOUT = (1 << 3),
98 INT_EN_TX_BUF_UA = (1 << 2),
99 INT_EN_TX_DMA_STOP = (1 << 1),
100 INT_EN_TX = (1 << 0),
101 };
102
103 enum {
104 TX_CTL0_TX_EN = (1 << 31),
105 TX_CTL1_TX_DMA_START = (1 << 31),
106 TX_CTL1_TX_DMA_EN = (1 << 30),
107 TX_CTL1_TX_FLUSH = (1 << 0),
108 };
109
110 enum {
111 RX_CTL0_RX_EN = (1 << 31),
112 RX_CTL0_STRIP_FCS = (1 << 28),
113 RX_CTL0_CRC_IPV4 = (1 << 27),
114 };
115
116 enum {
117 RX_CTL1_RX_DMA_START = (1 << 31),
118 RX_CTL1_RX_DMA_EN = (1 << 30),
119 RX_CTL1_RX_MD = (1 << 1),
120 };
121
122 enum {
123 RX_FRM_FLT_DIS_ADDR = (1 << 31),
124 };
125
126 enum {
127 MII_CMD_PHY_ADDR_SHIFT = (12),
128 MII_CMD_PHY_ADDR_MASK = (0xf000),
129 MII_CMD_PHY_REG_SHIFT = (4),
130 MII_CMD_PHY_REG_MASK = (0xf0),
131 MII_CMD_PHY_RW = (1 << 1),
132 MII_CMD_PHY_BUSY = (1 << 0),
133 };
134
135 enum {
136 TX_DMA_STA_STOP = (0b000),
137 TX_DMA_STA_RUN_FETCH = (0b001),
138 TX_DMA_STA_WAIT_STA = (0b010),
139 };
140
141 enum {
142 RX_DMA_STA_STOP = (0b000),
143 RX_DMA_STA_RUN_FETCH = (0b001),
144 RX_DMA_STA_WAIT_FRM = (0b011),
145 };
146
147 /* EMAC register reset values */
148 enum {
149 REG_BASIC_CTL_1_RST = 0x08000000,
150 };
151
152 /* EMAC constants */
153 enum {
154 AW_SUN8I_EMAC_MIN_PKT_SZ = 64
155 };
156
157 /* Transmit/receive frame descriptor */
158 typedef struct FrameDescriptor {
159 uint32_t status;
160 uint32_t status2;
161 uint32_t addr;
162 uint32_t next;
163 } FrameDescriptor;
164
165 /* Frame descriptor flags */
166 enum {
167 DESC_STATUS_CTL = (1 << 31),
168 DESC_STATUS2_BUF_SIZE_MASK = (0x7ff),
169 };
170
171 /* Transmit frame descriptor flags */
172 enum {
173 TX_DESC_STATUS_LENGTH_ERR = (1 << 14),
174 TX_DESC_STATUS2_FIRST_DESC = (1 << 29),
175 TX_DESC_STATUS2_LAST_DESC = (1 << 30),
176 TX_DESC_STATUS2_CHECKSUM_MASK = (0x3 << 27),
177 };
178
179 /* Receive frame descriptor flags */
180 enum {
181 RX_DESC_STATUS_FIRST_DESC = (1 << 9),
182 RX_DESC_STATUS_LAST_DESC = (1 << 8),
183 RX_DESC_STATUS_FRM_LEN_MASK = (0x3fff0000),
184 RX_DESC_STATUS_FRM_LEN_SHIFT = (16),
185 RX_DESC_STATUS_NO_BUF = (1 << 14),
186 RX_DESC_STATUS_HEADER_ERR = (1 << 7),
187 RX_DESC_STATUS_LENGTH_ERR = (1 << 4),
188 RX_DESC_STATUS_CRC_ERR = (1 << 1),
189 RX_DESC_STATUS_PAYLOAD_ERR = (1 << 0),
190 RX_DESC_STATUS2_RX_INT_CTL = (1 << 31),
191 };
192
193 /* MII register offsets */
194 enum {
195 MII_REG_CR = (0x0), /* Control */
196 MII_REG_ST = (0x1), /* Status */
197 MII_REG_ID_HIGH = (0x2), /* Identifier High */
198 MII_REG_ID_LOW = (0x3), /* Identifier Low */
199 MII_REG_ADV = (0x4), /* Advertised abilities */
200 MII_REG_LPA = (0x5), /* Link partner abilities */
201 };
202
203 /* MII register flags */
204 enum {
205 MII_REG_CR_RESET = (1 << 15),
206 MII_REG_CR_POWERDOWN = (1 << 11),
207 MII_REG_CR_10Mbit = (0),
208 MII_REG_CR_100Mbit = (1 << 13),
209 MII_REG_CR_1000Mbit = (1 << 6),
210 MII_REG_CR_AUTO_NEG = (1 << 12),
211 MII_REG_CR_AUTO_NEG_RESTART = (1 << 9),
212 MII_REG_CR_FULLDUPLEX = (1 << 8),
213 };
214
215 enum {
216 MII_REG_ST_100BASE_T4 = (1 << 15),
217 MII_REG_ST_100BASE_X_FD = (1 << 14),
218 MII_REG_ST_100BASE_X_HD = (1 << 13),
219 MII_REG_ST_10_FD = (1 << 12),
220 MII_REG_ST_10_HD = (1 << 11),
221 MII_REG_ST_100BASE_T2_FD = (1 << 10),
222 MII_REG_ST_100BASE_T2_HD = (1 << 9),
223 MII_REG_ST_AUTONEG_COMPLETE = (1 << 5),
224 MII_REG_ST_AUTONEG_AVAIL = (1 << 3),
225 MII_REG_ST_LINK_UP = (1 << 2),
226 };
227
228 enum {
229 MII_REG_LPA_10_HD = (1 << 5),
230 MII_REG_LPA_10_FD = (1 << 6),
231 MII_REG_LPA_100_HD = (1 << 7),
232 MII_REG_LPA_100_FD = (1 << 8),
233 MII_REG_LPA_PAUSE = (1 << 10),
234 MII_REG_LPA_ASYMPAUSE = (1 << 11),
235 };
236
237 /* MII constants */
238 enum {
239 MII_PHY_ID_HIGH = 0x0044,
240 MII_PHY_ID_LOW = 0x1400,
241 };
242
243 static void allwinner_sun8i_emac_mii_set_link(AwSun8iEmacState *s,
244 bool link_active)
245 {
246 if (link_active) {
247 s->mii_st |= MII_REG_ST_LINK_UP;
248 } else {
249 s->mii_st &= ~MII_REG_ST_LINK_UP;
250 }
251 }
252
253 static void allwinner_sun8i_emac_mii_reset(AwSun8iEmacState *s,
254 bool link_active)
255 {
256 s->mii_cr = MII_REG_CR_100Mbit | MII_REG_CR_AUTO_NEG |
257 MII_REG_CR_FULLDUPLEX;
258 s->mii_st = MII_REG_ST_100BASE_T4 | MII_REG_ST_100BASE_X_FD |
259 MII_REG_ST_100BASE_X_HD | MII_REG_ST_10_FD | MII_REG_ST_10_HD |
260 MII_REG_ST_100BASE_T2_FD | MII_REG_ST_100BASE_T2_HD |
261 MII_REG_ST_AUTONEG_COMPLETE | MII_REG_ST_AUTONEG_AVAIL;
262 s->mii_adv = 0;
263
264 allwinner_sun8i_emac_mii_set_link(s, link_active);
265 }
266
267 static void allwinner_sun8i_emac_mii_cmd(AwSun8iEmacState *s)
268 {
269 uint8_t addr, reg;
270
271 addr = (s->mii_cmd & MII_CMD_PHY_ADDR_MASK) >> MII_CMD_PHY_ADDR_SHIFT;
272 reg = (s->mii_cmd & MII_CMD_PHY_REG_MASK) >> MII_CMD_PHY_REG_SHIFT;
273
274 if (addr != s->mii_phy_addr) {
275 return;
276 }
277
278 /* Read or write a PHY register? */
279 if (s->mii_cmd & MII_CMD_PHY_RW) {
280 trace_allwinner_sun8i_emac_mii_write_reg(reg, s->mii_data);
281
282 switch (reg) {
283 case MII_REG_CR:
284 if (s->mii_data & MII_REG_CR_RESET) {
285 allwinner_sun8i_emac_mii_reset(s, s->mii_st &
286 MII_REG_ST_LINK_UP);
287 } else {
288 s->mii_cr = s->mii_data & ~(MII_REG_CR_RESET |
289 MII_REG_CR_AUTO_NEG_RESTART);
290 }
291 break;
292 case MII_REG_ADV:
293 s->mii_adv = s->mii_data;
294 break;
295 case MII_REG_ID_HIGH:
296 case MII_REG_ID_LOW:
297 case MII_REG_LPA:
298 break;
299 default:
300 qemu_log_mask(LOG_UNIMP, "allwinner-h3-emac: write access to "
301 "unknown MII register 0x%x\n", reg);
302 break;
303 }
304 } else {
305 switch (reg) {
306 case MII_REG_CR:
307 s->mii_data = s->mii_cr;
308 break;
309 case MII_REG_ST:
310 s->mii_data = s->mii_st;
311 break;
312 case MII_REG_ID_HIGH:
313 s->mii_data = MII_PHY_ID_HIGH;
314 break;
315 case MII_REG_ID_LOW:
316 s->mii_data = MII_PHY_ID_LOW;
317 break;
318 case MII_REG_ADV:
319 s->mii_data = s->mii_adv;
320 break;
321 case MII_REG_LPA:
322 s->mii_data = MII_REG_LPA_10_HD | MII_REG_LPA_10_FD |
323 MII_REG_LPA_100_HD | MII_REG_LPA_100_FD |
324 MII_REG_LPA_PAUSE | MII_REG_LPA_ASYMPAUSE;
325 break;
326 default:
327 qemu_log_mask(LOG_UNIMP, "allwinner-h3-emac: read access to "
328 "unknown MII register 0x%x\n", reg);
329 s->mii_data = 0;
330 break;
331 }
332
333 trace_allwinner_sun8i_emac_mii_read_reg(reg, s->mii_data);
334 }
335 }
336
337 static void allwinner_sun8i_emac_update_irq(AwSun8iEmacState *s)
338 {
339 qemu_set_irq(s->irq, (s->int_sta & s->int_en) != 0);
340 }
341
342 static uint32_t allwinner_sun8i_emac_next_desc(AwSun8iEmacState *s,
343 FrameDescriptor *desc,
344 size_t min_size)
345 {
346 uint32_t paddr = desc->next;
347
348 dma_memory_read(&s->dma_as, paddr, desc, sizeof(*desc));
349
350 if ((desc->status & DESC_STATUS_CTL) &&
351 (desc->status2 & DESC_STATUS2_BUF_SIZE_MASK) >= min_size) {
352 return paddr;
353 } else {
354 return 0;
355 }
356 }
357
358 static uint32_t allwinner_sun8i_emac_get_desc(AwSun8iEmacState *s,
359 FrameDescriptor *desc,
360 uint32_t start_addr,
361 size_t min_size)
362 {
363 uint32_t desc_addr = start_addr;
364
365 /* Note that the list is a cycle. Last entry points back to the head. */
366 while (desc_addr != 0) {
367 dma_memory_read(&s->dma_as, desc_addr, desc, sizeof(*desc));
368
369 if ((desc->status & DESC_STATUS_CTL) &&
370 (desc->status2 & DESC_STATUS2_BUF_SIZE_MASK) >= min_size) {
371 return desc_addr;
372 } else if (desc->next == start_addr) {
373 break;
374 } else {
375 desc_addr = desc->next;
376 }
377 }
378
379 return 0;
380 }
381
382 static uint32_t allwinner_sun8i_emac_rx_desc(AwSun8iEmacState *s,
383 FrameDescriptor *desc,
384 size_t min_size)
385 {
386 return allwinner_sun8i_emac_get_desc(s, desc, s->rx_desc_curr, min_size);
387 }
388
389 static uint32_t allwinner_sun8i_emac_tx_desc(AwSun8iEmacState *s,
390 FrameDescriptor *desc,
391 size_t min_size)
392 {
393 return allwinner_sun8i_emac_get_desc(s, desc, s->tx_desc_head, min_size);
394 }
395
396 static void allwinner_sun8i_emac_flush_desc(AwSun8iEmacState *s,
397 FrameDescriptor *desc,
398 uint32_t phys_addr)
399 {
400 dma_memory_write(&s->dma_as, phys_addr, desc, sizeof(*desc));
401 }
402
403 static bool allwinner_sun8i_emac_can_receive(NetClientState *nc)
404 {
405 AwSun8iEmacState *s = qemu_get_nic_opaque(nc);
406 FrameDescriptor desc;
407
408 return (s->rx_ctl0 & RX_CTL0_RX_EN) &&
409 (allwinner_sun8i_emac_rx_desc(s, &desc, 0) != 0);
410 }
411
412 static ssize_t allwinner_sun8i_emac_receive(NetClientState *nc,
413 const uint8_t *buf,
414 size_t size)
415 {
416 AwSun8iEmacState *s = qemu_get_nic_opaque(nc);
417 FrameDescriptor desc;
418 size_t bytes_left = size;
419 size_t desc_bytes = 0;
420 size_t pad_fcs_size = 4;
421 size_t padding = 0;
422
423 if (!(s->rx_ctl0 & RX_CTL0_RX_EN)) {
424 return -1;
425 }
426
427 s->rx_desc_curr = allwinner_sun8i_emac_rx_desc(s, &desc,
428 AW_SUN8I_EMAC_MIN_PKT_SZ);
429 if (!s->rx_desc_curr) {
430 s->int_sta |= INT_STA_RX_BUF_UA;
431 }
432
433 /* Keep filling RX descriptors until the whole frame is written */
434 while (s->rx_desc_curr && bytes_left > 0) {
435 desc.status &= ~DESC_STATUS_CTL;
436 desc.status &= ~RX_DESC_STATUS_FRM_LEN_MASK;
437
438 if (bytes_left == size) {
439 desc.status |= RX_DESC_STATUS_FIRST_DESC;
440 }
441
442 if ((desc.status2 & DESC_STATUS2_BUF_SIZE_MASK) <
443 (bytes_left + pad_fcs_size)) {
444 desc_bytes = desc.status2 & DESC_STATUS2_BUF_SIZE_MASK;
445 desc.status |= desc_bytes << RX_DESC_STATUS_FRM_LEN_SHIFT;
446 } else {
447 padding = pad_fcs_size;
448 if (bytes_left < AW_SUN8I_EMAC_MIN_PKT_SZ) {
449 padding += (AW_SUN8I_EMAC_MIN_PKT_SZ - bytes_left);
450 }
451
452 desc_bytes = (bytes_left);
453 desc.status |= RX_DESC_STATUS_LAST_DESC;
454 desc.status |= (bytes_left + padding)
455 << RX_DESC_STATUS_FRM_LEN_SHIFT;
456 }
457
458 dma_memory_write(&s->dma_as, desc.addr, buf, desc_bytes);
459 allwinner_sun8i_emac_flush_desc(s, &desc, s->rx_desc_curr);
460 trace_allwinner_sun8i_emac_receive(s->rx_desc_curr, desc.addr,
461 desc_bytes);
462
463 /* Check if frame needs to raise the receive interrupt */
464 if (!(desc.status2 & RX_DESC_STATUS2_RX_INT_CTL)) {
465 s->int_sta |= INT_STA_RX;
466 }
467
468 /* Increment variables */
469 buf += desc_bytes;
470 bytes_left -= desc_bytes;
471
472 /* Move to the next descriptor */
473 s->rx_desc_curr = allwinner_sun8i_emac_next_desc(s, &desc, 64);
474 if (!s->rx_desc_curr) {
475 /* Not enough buffer space available */
476 s->int_sta |= INT_STA_RX_BUF_UA;
477 s->rx_desc_curr = s->rx_desc_head;
478 break;
479 }
480 }
481
482 /* Report receive DMA is finished */
483 s->rx_ctl1 &= ~RX_CTL1_RX_DMA_START;
484 allwinner_sun8i_emac_update_irq(s);
485
486 return size;
487 }
488
489 static void allwinner_sun8i_emac_transmit(AwSun8iEmacState *s)
490 {
491 NetClientState *nc = qemu_get_queue(s->nic);
492 FrameDescriptor desc;
493 size_t bytes = 0;
494 size_t packet_bytes = 0;
495 size_t transmitted = 0;
496 static uint8_t packet_buf[2048];
497
498 s->tx_desc_curr = allwinner_sun8i_emac_tx_desc(s, &desc, 0);
499
500 /* Read all transmit descriptors */
501 while (s->tx_desc_curr != 0) {
502
503 /* Read from physical memory into packet buffer */
504 bytes = desc.status2 & DESC_STATUS2_BUF_SIZE_MASK;
505 if (bytes + packet_bytes > sizeof(packet_buf)) {
506 desc.status |= TX_DESC_STATUS_LENGTH_ERR;
507 break;
508 }
509 dma_memory_read(&s->dma_as, desc.addr, packet_buf + packet_bytes, bytes);
510 packet_bytes += bytes;
511 desc.status &= ~DESC_STATUS_CTL;
512 allwinner_sun8i_emac_flush_desc(s, &desc, s->tx_desc_curr);
513
514 /* After the last descriptor, send the packet */
515 if (desc.status2 & TX_DESC_STATUS2_LAST_DESC) {
516 if (desc.status2 & TX_DESC_STATUS2_CHECKSUM_MASK) {
517 net_checksum_calculate(packet_buf, packet_bytes, CSUM_ALL);
518 }
519
520 qemu_send_packet(nc, packet_buf, packet_bytes);
521 trace_allwinner_sun8i_emac_transmit(s->tx_desc_curr, desc.addr,
522 bytes);
523
524 packet_bytes = 0;
525 transmitted++;
526 }
527 s->tx_desc_curr = allwinner_sun8i_emac_next_desc(s, &desc, 0);
528 }
529
530 /* Raise transmit completed interrupt */
531 if (transmitted > 0) {
532 s->int_sta |= INT_STA_TX;
533 s->tx_ctl1 &= ~TX_CTL1_TX_DMA_START;
534 allwinner_sun8i_emac_update_irq(s);
535 }
536 }
537
538 static void allwinner_sun8i_emac_reset(DeviceState *dev)
539 {
540 AwSun8iEmacState *s = AW_SUN8I_EMAC(dev);
541 NetClientState *nc = qemu_get_queue(s->nic);
542
543 trace_allwinner_sun8i_emac_reset();
544
545 s->mii_cmd = 0;
546 s->mii_data = 0;
547 s->basic_ctl0 = 0;
548 s->basic_ctl1 = REG_BASIC_CTL_1_RST;
549 s->int_en = 0;
550 s->int_sta = 0;
551 s->frm_flt = 0;
552 s->rx_ctl0 = 0;
553 s->rx_ctl1 = RX_CTL1_RX_MD;
554 s->rx_desc_head = 0;
555 s->rx_desc_curr = 0;
556 s->tx_ctl0 = 0;
557 s->tx_ctl1 = 0;
558 s->tx_desc_head = 0;
559 s->tx_desc_curr = 0;
560 s->tx_flowctl = 0;
561
562 allwinner_sun8i_emac_mii_reset(s, !nc->link_down);
563 }
564
565 static uint64_t allwinner_sun8i_emac_read(void *opaque, hwaddr offset,
566 unsigned size)
567 {
568 AwSun8iEmacState *s = AW_SUN8I_EMAC(opaque);
569 uint64_t value = 0;
570 FrameDescriptor desc;
571
572 switch (offset) {
573 case REG_BASIC_CTL_0: /* Basic Control 0 */
574 value = s->basic_ctl0;
575 break;
576 case REG_BASIC_CTL_1: /* Basic Control 1 */
577 value = s->basic_ctl1;
578 break;
579 case REG_INT_STA: /* Interrupt Status */
580 value = s->int_sta;
581 break;
582 case REG_INT_EN: /* Interrupt Enable */
583 value = s->int_en;
584 break;
585 case REG_TX_CTL_0: /* Transmit Control 0 */
586 value = s->tx_ctl0;
587 break;
588 case REG_TX_CTL_1: /* Transmit Control 1 */
589 value = s->tx_ctl1;
590 break;
591 case REG_TX_FLOW_CTL: /* Transmit Flow Control */
592 value = s->tx_flowctl;
593 break;
594 case REG_TX_DMA_DESC_LIST: /* Transmit Descriptor List Address */
595 value = s->tx_desc_head;
596 break;
597 case REG_RX_CTL_0: /* Receive Control 0 */
598 value = s->rx_ctl0;
599 break;
600 case REG_RX_CTL_1: /* Receive Control 1 */
601 value = s->rx_ctl1;
602 break;
603 case REG_RX_DMA_DESC_LIST: /* Receive Descriptor List Address */
604 value = s->rx_desc_head;
605 break;
606 case REG_FRM_FLT: /* Receive Frame Filter */
607 value = s->frm_flt;
608 break;
609 case REG_RX_HASH_0: /* Receive Hash Table 0 */
610 case REG_RX_HASH_1: /* Receive Hash Table 1 */
611 break;
612 case REG_MII_CMD: /* Management Interface Command */
613 value = s->mii_cmd;
614 break;
615 case REG_MII_DATA: /* Management Interface Data */
616 value = s->mii_data;
617 break;
618 case REG_ADDR_HIGH: /* MAC Address High */
619 value = lduw_le_p(s->conf.macaddr.a + 4);
620 break;
621 case REG_ADDR_LOW: /* MAC Address Low */
622 value = ldl_le_p(s->conf.macaddr.a);
623 break;
624 case REG_TX_DMA_STA: /* Transmit DMA Status */
625 break;
626 case REG_TX_CUR_DESC: /* Transmit Current Descriptor */
627 value = s->tx_desc_curr;
628 break;
629 case REG_TX_CUR_BUF: /* Transmit Current Buffer */
630 if (s->tx_desc_curr != 0) {
631 dma_memory_read(&s->dma_as, s->tx_desc_curr, &desc, sizeof(desc));
632 value = desc.addr;
633 } else {
634 value = 0;
635 }
636 break;
637 case REG_RX_DMA_STA: /* Receive DMA Status */
638 break;
639 case REG_RX_CUR_DESC: /* Receive Current Descriptor */
640 value = s->rx_desc_curr;
641 break;
642 case REG_RX_CUR_BUF: /* Receive Current Buffer */
643 if (s->rx_desc_curr != 0) {
644 dma_memory_read(&s->dma_as, s->rx_desc_curr, &desc, sizeof(desc));
645 value = desc.addr;
646 } else {
647 value = 0;
648 }
649 break;
650 case REG_RGMII_STA: /* RGMII Status */
651 break;
652 default:
653 qemu_log_mask(LOG_UNIMP, "allwinner-h3-emac: read access to unknown "
654 "EMAC register 0x" TARGET_FMT_plx "\n",
655 offset);
656 }
657
658 trace_allwinner_sun8i_emac_read(offset, value);
659 return value;
660 }
661
662 static void allwinner_sun8i_emac_write(void *opaque, hwaddr offset,
663 uint64_t value, unsigned size)
664 {
665 AwSun8iEmacState *s = AW_SUN8I_EMAC(opaque);
666 NetClientState *nc = qemu_get_queue(s->nic);
667
668 trace_allwinner_sun8i_emac_write(offset, value);
669
670 switch (offset) {
671 case REG_BASIC_CTL_0: /* Basic Control 0 */
672 s->basic_ctl0 = value;
673 break;
674 case REG_BASIC_CTL_1: /* Basic Control 1 */
675 if (value & BASIC_CTL1_SOFTRST) {
676 allwinner_sun8i_emac_reset(DEVICE(s));
677 value &= ~BASIC_CTL1_SOFTRST;
678 }
679 s->basic_ctl1 = value;
680 if (allwinner_sun8i_emac_can_receive(nc)) {
681 qemu_flush_queued_packets(nc);
682 }
683 break;
684 case REG_INT_STA: /* Interrupt Status */
685 s->int_sta &= ~value;
686 allwinner_sun8i_emac_update_irq(s);
687 break;
688 case REG_INT_EN: /* Interrupt Enable */
689 s->int_en = value;
690 allwinner_sun8i_emac_update_irq(s);
691 break;
692 case REG_TX_CTL_0: /* Transmit Control 0 */
693 s->tx_ctl0 = value;
694 break;
695 case REG_TX_CTL_1: /* Transmit Control 1 */
696 s->tx_ctl1 = value;
697 if (value & TX_CTL1_TX_DMA_EN) {
698 allwinner_sun8i_emac_transmit(s);
699 }
700 break;
701 case REG_TX_FLOW_CTL: /* Transmit Flow Control */
702 s->tx_flowctl = value;
703 break;
704 case REG_TX_DMA_DESC_LIST: /* Transmit Descriptor List Address */
705 s->tx_desc_head = value;
706 s->tx_desc_curr = value;
707 break;
708 case REG_RX_CTL_0: /* Receive Control 0 */
709 s->rx_ctl0 = value;
710 break;
711 case REG_RX_CTL_1: /* Receive Control 1 */
712 s->rx_ctl1 = value | RX_CTL1_RX_MD;
713 if ((value & RX_CTL1_RX_DMA_EN) &&
714 allwinner_sun8i_emac_can_receive(nc)) {
715 qemu_flush_queued_packets(nc);
716 }
717 break;
718 case REG_RX_DMA_DESC_LIST: /* Receive Descriptor List Address */
719 s->rx_desc_head = value;
720 s->rx_desc_curr = value;
721 break;
722 case REG_FRM_FLT: /* Receive Frame Filter */
723 s->frm_flt = value;
724 break;
725 case REG_RX_HASH_0: /* Receive Hash Table 0 */
726 case REG_RX_HASH_1: /* Receive Hash Table 1 */
727 break;
728 case REG_MII_CMD: /* Management Interface Command */
729 s->mii_cmd = value & ~MII_CMD_PHY_BUSY;
730 allwinner_sun8i_emac_mii_cmd(s);
731 break;
732 case REG_MII_DATA: /* Management Interface Data */
733 s->mii_data = value;
734 break;
735 case REG_ADDR_HIGH: /* MAC Address High */
736 stw_le_p(s->conf.macaddr.a + 4, value);
737 break;
738 case REG_ADDR_LOW: /* MAC Address Low */
739 stl_le_p(s->conf.macaddr.a, value);
740 break;
741 case REG_TX_DMA_STA: /* Transmit DMA Status */
742 case REG_TX_CUR_DESC: /* Transmit Current Descriptor */
743 case REG_TX_CUR_BUF: /* Transmit Current Buffer */
744 case REG_RX_DMA_STA: /* Receive DMA Status */
745 case REG_RX_CUR_DESC: /* Receive Current Descriptor */
746 case REG_RX_CUR_BUF: /* Receive Current Buffer */
747 case REG_RGMII_STA: /* RGMII Status */
748 break;
749 default:
750 qemu_log_mask(LOG_UNIMP, "allwinner-h3-emac: write access to unknown "
751 "EMAC register 0x" TARGET_FMT_plx "\n",
752 offset);
753 }
754 }
755
756 static void allwinner_sun8i_emac_set_link(NetClientState *nc)
757 {
758 AwSun8iEmacState *s = qemu_get_nic_opaque(nc);
759
760 trace_allwinner_sun8i_emac_set_link(!nc->link_down);
761 allwinner_sun8i_emac_mii_set_link(s, !nc->link_down);
762 }
763
764 static const MemoryRegionOps allwinner_sun8i_emac_mem_ops = {
765 .read = allwinner_sun8i_emac_read,
766 .write = allwinner_sun8i_emac_write,
767 .endianness = DEVICE_NATIVE_ENDIAN,
768 .valid = {
769 .min_access_size = 4,
770 .max_access_size = 4,
771 },
772 .impl.min_access_size = 4,
773 };
774
775 static NetClientInfo net_allwinner_sun8i_emac_info = {
776 .type = NET_CLIENT_DRIVER_NIC,
777 .size = sizeof(NICState),
778 .can_receive = allwinner_sun8i_emac_can_receive,
779 .receive = allwinner_sun8i_emac_receive,
780 .link_status_changed = allwinner_sun8i_emac_set_link,
781 };
782
783 static void allwinner_sun8i_emac_init(Object *obj)
784 {
785 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
786 AwSun8iEmacState *s = AW_SUN8I_EMAC(obj);
787
788 memory_region_init_io(&s->iomem, OBJECT(s), &allwinner_sun8i_emac_mem_ops,
789 s, TYPE_AW_SUN8I_EMAC, 64 * KiB);
790 sysbus_init_mmio(sbd, &s->iomem);
791 sysbus_init_irq(sbd, &s->irq);
792 }
793
794 static void allwinner_sun8i_emac_realize(DeviceState *dev, Error **errp)
795 {
796 AwSun8iEmacState *s = AW_SUN8I_EMAC(dev);
797
798 if (!s->dma_mr) {
799 error_setg(errp, TYPE_AW_SUN8I_EMAC " 'dma-memory' link not set");
800 return;
801 }
802
803 address_space_init(&s->dma_as, s->dma_mr, "emac-dma");
804
805 qemu_macaddr_default_if_unset(&s->conf.macaddr);
806 s->nic = qemu_new_nic(&net_allwinner_sun8i_emac_info, &s->conf,
807 object_get_typename(OBJECT(dev)), dev->id, s);
808 qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
809 }
810
811 static Property allwinner_sun8i_emac_properties[] = {
812 DEFINE_NIC_PROPERTIES(AwSun8iEmacState, conf),
813 DEFINE_PROP_UINT8("phy-addr", AwSun8iEmacState, mii_phy_addr, 0),
814 DEFINE_PROP_LINK("dma-memory", AwSun8iEmacState, dma_mr,
815 TYPE_MEMORY_REGION, MemoryRegion *),
816 DEFINE_PROP_END_OF_LIST(),
817 };
818
819 static int allwinner_sun8i_emac_post_load(void *opaque, int version_id)
820 {
821 AwSun8iEmacState *s = opaque;
822
823 allwinner_sun8i_emac_set_link(qemu_get_queue(s->nic));
824
825 return 0;
826 }
827
828 static const VMStateDescription vmstate_aw_emac = {
829 .name = "allwinner-sun8i-emac",
830 .version_id = 1,
831 .minimum_version_id = 1,
832 .post_load = allwinner_sun8i_emac_post_load,
833 .fields = (VMStateField[]) {
834 VMSTATE_UINT8(mii_phy_addr, AwSun8iEmacState),
835 VMSTATE_UINT32(mii_cmd, AwSun8iEmacState),
836 VMSTATE_UINT32(mii_data, AwSun8iEmacState),
837 VMSTATE_UINT32(mii_cr, AwSun8iEmacState),
838 VMSTATE_UINT32(mii_st, AwSun8iEmacState),
839 VMSTATE_UINT32(mii_adv, AwSun8iEmacState),
840 VMSTATE_UINT32(basic_ctl0, AwSun8iEmacState),
841 VMSTATE_UINT32(basic_ctl1, AwSun8iEmacState),
842 VMSTATE_UINT32(int_en, AwSun8iEmacState),
843 VMSTATE_UINT32(int_sta, AwSun8iEmacState),
844 VMSTATE_UINT32(frm_flt, AwSun8iEmacState),
845 VMSTATE_UINT32(rx_ctl0, AwSun8iEmacState),
846 VMSTATE_UINT32(rx_ctl1, AwSun8iEmacState),
847 VMSTATE_UINT32(rx_desc_head, AwSun8iEmacState),
848 VMSTATE_UINT32(rx_desc_curr, AwSun8iEmacState),
849 VMSTATE_UINT32(tx_ctl0, AwSun8iEmacState),
850 VMSTATE_UINT32(tx_ctl1, AwSun8iEmacState),
851 VMSTATE_UINT32(tx_desc_head, AwSun8iEmacState),
852 VMSTATE_UINT32(tx_desc_curr, AwSun8iEmacState),
853 VMSTATE_UINT32(tx_flowctl, AwSun8iEmacState),
854 VMSTATE_END_OF_LIST()
855 }
856 };
857
858 static void allwinner_sun8i_emac_class_init(ObjectClass *klass, void *data)
859 {
860 DeviceClass *dc = DEVICE_CLASS(klass);
861
862 dc->realize = allwinner_sun8i_emac_realize;
863 dc->reset = allwinner_sun8i_emac_reset;
864 dc->vmsd = &vmstate_aw_emac;
865 device_class_set_props(dc, allwinner_sun8i_emac_properties);
866 }
867
868 static const TypeInfo allwinner_sun8i_emac_info = {
869 .name = TYPE_AW_SUN8I_EMAC,
870 .parent = TYPE_SYS_BUS_DEVICE,
871 .instance_size = sizeof(AwSun8iEmacState),
872 .instance_init = allwinner_sun8i_emac_init,
873 .class_init = allwinner_sun8i_emac_class_init,
874 };
875
876 static void allwinner_sun8i_emac_register_types(void)
877 {
878 type_register_static(&allwinner_sun8i_emac_info);
879 }
880
881 type_init(allwinner_sun8i_emac_register_types)
AR7 emulation for QEMU