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ppc/pnv: Add POWER10 quads
[qemu.git] / hw / net / allwinner-sun8i-emac.c
blobecc0245fe8aa8ad0dbf22b6601a31b853800e6c7
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 bool allwinner_sun8i_emac_desc_owned(FrameDescriptor *desc,
343 size_t min_buf_size)
344 {
345 return (desc->status & DESC_STATUS_CTL) && (min_buf_size == 0 ||
346 (desc->status2 & DESC_STATUS2_BUF_SIZE_MASK) >= min_buf_size);
347 }
348
349 static void allwinner_sun8i_emac_get_desc(AwSun8iEmacState *s,
350 FrameDescriptor *desc,
351 uint32_t phys_addr)
352 {
353 dma_memory_read(&s->dma_as, phys_addr, desc, sizeof(*desc),
354 MEMTXATTRS_UNSPECIFIED);
355 }
356
357 static uint32_t allwinner_sun8i_emac_next_desc(AwSun8iEmacState *s,
358 FrameDescriptor *desc)
359 {
360 const uint32_t nxt = desc->next;
361 allwinner_sun8i_emac_get_desc(s, desc, nxt);
362 return nxt;
363 }
364
365 static uint32_t allwinner_sun8i_emac_find_desc(AwSun8iEmacState *s,
366 FrameDescriptor *desc,
367 uint32_t start_addr,
368 size_t min_size)
369 {
370 uint32_t desc_addr = start_addr;
371
372 /* Note that the list is a cycle. Last entry points back to the head. */
373 while (desc_addr != 0) {
374 allwinner_sun8i_emac_get_desc(s, desc, desc_addr);
375
376 if (allwinner_sun8i_emac_desc_owned(desc, min_size)) {
377 return desc_addr;
378 } else if (desc->next == start_addr) {
379 break;
380 } else {
381 desc_addr = desc->next;
382 }
383 }
384
385 return 0;
386 }
387
388 static uint32_t allwinner_sun8i_emac_rx_desc(AwSun8iEmacState *s,
389 FrameDescriptor *desc,
390 size_t min_size)
391 {
392 return allwinner_sun8i_emac_find_desc(s, desc, s->rx_desc_curr, min_size);
393 }
394
395 static uint32_t allwinner_sun8i_emac_tx_desc(AwSun8iEmacState *s,
396 FrameDescriptor *desc)
397 {
398 allwinner_sun8i_emac_get_desc(s, desc, s->tx_desc_curr);
399 return s->tx_desc_curr;
400 }
401
402 static void allwinner_sun8i_emac_flush_desc(AwSun8iEmacState *s,
403 FrameDescriptor *desc,
404 uint32_t phys_addr)
405 {
406 dma_memory_write(&s->dma_as, phys_addr, desc, sizeof(*desc),
407 MEMTXATTRS_UNSPECIFIED);
408 }
409
410 static bool allwinner_sun8i_emac_can_receive(NetClientState *nc)
411 {
412 AwSun8iEmacState *s = qemu_get_nic_opaque(nc);
413 FrameDescriptor desc;
414
415 return (s->rx_ctl0 & RX_CTL0_RX_EN) &&
416 (allwinner_sun8i_emac_rx_desc(s, &desc, 0) != 0);
417 }
418
419 static ssize_t allwinner_sun8i_emac_receive(NetClientState *nc,
420 const uint8_t *buf,
421 size_t size)
422 {
423 AwSun8iEmacState *s = qemu_get_nic_opaque(nc);
424 FrameDescriptor desc;
425 size_t bytes_left = size;
426 size_t desc_bytes = 0;
427 size_t pad_fcs_size = 4;
428 size_t padding = 0;
429
430 if (!(s->rx_ctl0 & RX_CTL0_RX_EN)) {
431 return -1;
432 }
433
434 s->rx_desc_curr = allwinner_sun8i_emac_rx_desc(s, &desc,
435 AW_SUN8I_EMAC_MIN_PKT_SZ);
436 if (!s->rx_desc_curr) {
437 s->int_sta |= INT_STA_RX_BUF_UA;
438 }
439
440 /* Keep filling RX descriptors until the whole frame is written */
441 while (s->rx_desc_curr && bytes_left > 0) {
442 desc.status &= ~DESC_STATUS_CTL;
443 desc.status &= ~RX_DESC_STATUS_FRM_LEN_MASK;
444
445 if (bytes_left == size) {
446 desc.status |= RX_DESC_STATUS_FIRST_DESC;
447 }
448
449 if ((desc.status2 & DESC_STATUS2_BUF_SIZE_MASK) <
450 (bytes_left + pad_fcs_size)) {
451 desc_bytes = desc.status2 & DESC_STATUS2_BUF_SIZE_MASK;
452 desc.status |= desc_bytes << RX_DESC_STATUS_FRM_LEN_SHIFT;
453 } else {
454 padding = pad_fcs_size;
455 if (bytes_left < AW_SUN8I_EMAC_MIN_PKT_SZ) {
456 padding += (AW_SUN8I_EMAC_MIN_PKT_SZ - bytes_left);
457 }
458
459 desc_bytes = (bytes_left);
460 desc.status |= RX_DESC_STATUS_LAST_DESC;
461 desc.status |= (bytes_left + padding)
462 << RX_DESC_STATUS_FRM_LEN_SHIFT;
463 }
464
465 dma_memory_write(&s->dma_as, desc.addr, buf, desc_bytes,
466 MEMTXATTRS_UNSPECIFIED);
467 allwinner_sun8i_emac_flush_desc(s, &desc, s->rx_desc_curr);
468 trace_allwinner_sun8i_emac_receive(s->rx_desc_curr, desc.addr,
469 desc_bytes);
470
471 /* Check if frame needs to raise the receive interrupt */
472 if (!(desc.status2 & RX_DESC_STATUS2_RX_INT_CTL)) {
473 s->int_sta |= INT_STA_RX;
474 }
475
476 /* Increment variables */
477 buf += desc_bytes;
478 bytes_left -= desc_bytes;
479
480 /* Move to the next descriptor */
481 s->rx_desc_curr = allwinner_sun8i_emac_find_desc(s, &desc, desc.next,
482 AW_SUN8I_EMAC_MIN_PKT_SZ);
483 if (!s->rx_desc_curr) {
484 /* Not enough buffer space available */
485 s->int_sta |= INT_STA_RX_BUF_UA;
486 s->rx_desc_curr = s->rx_desc_head;
487 break;
488 }
489 }
490
491 /* Report receive DMA is finished */
492 s->rx_ctl1 &= ~RX_CTL1_RX_DMA_START;
493 allwinner_sun8i_emac_update_irq(s);
494
495 return size;
496 }
497
498 static void allwinner_sun8i_emac_transmit(AwSun8iEmacState *s)
499 {
500 NetClientState *nc = qemu_get_queue(s->nic);
501 FrameDescriptor desc;
502 size_t bytes = 0;
503 size_t packet_bytes = 0;
504 size_t transmitted = 0;
505 static uint8_t packet_buf[2048];
506
507 s->tx_desc_curr = allwinner_sun8i_emac_tx_desc(s, &desc);
508
509 /* Read all transmit descriptors */
510 while (allwinner_sun8i_emac_desc_owned(&desc, 0)) {
511
512 /* Read from physical memory into packet buffer */
513 bytes = desc.status2 & DESC_STATUS2_BUF_SIZE_MASK;
514 if (bytes + packet_bytes > sizeof(packet_buf)) {
515 desc.status |= TX_DESC_STATUS_LENGTH_ERR;
516 break;
517 }
518 dma_memory_read(&s->dma_as, desc.addr, packet_buf + packet_bytes,
519 bytes, MEMTXATTRS_UNSPECIFIED);
520 packet_bytes += bytes;
521 desc.status &= ~DESC_STATUS_CTL;
522 allwinner_sun8i_emac_flush_desc(s, &desc, s->tx_desc_curr);
523
524 /* After the last descriptor, send the packet */
525 if (desc.status2 & TX_DESC_STATUS2_LAST_DESC) {
526 if (desc.status2 & TX_DESC_STATUS2_CHECKSUM_MASK) {
527 net_checksum_calculate(packet_buf, packet_bytes, CSUM_ALL);
528 }
529
530 qemu_send_packet(nc, packet_buf, packet_bytes);
531 trace_allwinner_sun8i_emac_transmit(s->tx_desc_curr, desc.addr,
532 bytes);
533
534 packet_bytes = 0;
535 transmitted++;
536 }
537 s->tx_desc_curr = allwinner_sun8i_emac_next_desc(s, &desc);
538 }
539
540 /* Raise transmit completed interrupt */
541 if (transmitted > 0) {
542 s->int_sta |= INT_STA_TX;
543 s->tx_ctl1 &= ~TX_CTL1_TX_DMA_START;
544 allwinner_sun8i_emac_update_irq(s);
545 }
546 }
547
548 static void allwinner_sun8i_emac_reset(DeviceState *dev)
549 {
550 AwSun8iEmacState *s = AW_SUN8I_EMAC(dev);
551 NetClientState *nc = qemu_get_queue(s->nic);
552
553 trace_allwinner_sun8i_emac_reset();
554
555 s->mii_cmd = 0;
556 s->mii_data = 0;
557 s->basic_ctl0 = 0;
558 s->basic_ctl1 = REG_BASIC_CTL_1_RST;
559 s->int_en = 0;
560 s->int_sta = 0;
561 s->frm_flt = 0;
562 s->rx_ctl0 = 0;
563 s->rx_ctl1 = RX_CTL1_RX_MD;
564 s->rx_desc_head = 0;
565 s->rx_desc_curr = 0;
566 s->tx_ctl0 = 0;
567 s->tx_ctl1 = 0;
568 s->tx_desc_head = 0;
569 s->tx_desc_curr = 0;
570 s->tx_flowctl = 0;
571
572 allwinner_sun8i_emac_mii_reset(s, !nc->link_down);
573 }
574
575 static uint64_t allwinner_sun8i_emac_read(void *opaque, hwaddr offset,
576 unsigned size)
577 {
578 AwSun8iEmacState *s = AW_SUN8I_EMAC(opaque);
579 uint64_t value = 0;
580 FrameDescriptor desc;
581
582 switch (offset) {
583 case REG_BASIC_CTL_0: /* Basic Control 0 */
584 value = s->basic_ctl0;
585 break;
586 case REG_BASIC_CTL_1: /* Basic Control 1 */
587 value = s->basic_ctl1;
588 break;
589 case REG_INT_STA: /* Interrupt Status */
590 value = s->int_sta;
591 break;
592 case REG_INT_EN: /* Interrupt Enable */
593 value = s->int_en;
594 break;
595 case REG_TX_CTL_0: /* Transmit Control 0 */
596 value = s->tx_ctl0;
597 break;
598 case REG_TX_CTL_1: /* Transmit Control 1 */
599 value = s->tx_ctl1;
600 break;
601 case REG_TX_FLOW_CTL: /* Transmit Flow Control */
602 value = s->tx_flowctl;
603 break;
604 case REG_TX_DMA_DESC_LIST: /* Transmit Descriptor List Address */
605 value = s->tx_desc_head;
606 break;
607 case REG_RX_CTL_0: /* Receive Control 0 */
608 value = s->rx_ctl0;
609 break;
610 case REG_RX_CTL_1: /* Receive Control 1 */
611 value = s->rx_ctl1;
612 break;
613 case REG_RX_DMA_DESC_LIST: /* Receive Descriptor List Address */
614 value = s->rx_desc_head;
615 break;
616 case REG_FRM_FLT: /* Receive Frame Filter */
617 value = s->frm_flt;
618 break;
619 case REG_RX_HASH_0: /* Receive Hash Table 0 */
620 case REG_RX_HASH_1: /* Receive Hash Table 1 */
621 break;
622 case REG_MII_CMD: /* Management Interface Command */
623 value = s->mii_cmd;
624 break;
625 case REG_MII_DATA: /* Management Interface Data */
626 value = s->mii_data;
627 break;
628 case REG_ADDR_HIGH: /* MAC Address High */
629 value = lduw_le_p(s->conf.macaddr.a + 4);
630 break;
631 case REG_ADDR_LOW: /* MAC Address Low */
632 value = ldl_le_p(s->conf.macaddr.a);
633 break;
634 case REG_TX_DMA_STA: /* Transmit DMA Status */
635 break;
636 case REG_TX_CUR_DESC: /* Transmit Current Descriptor */
637 value = s->tx_desc_curr;
638 break;
639 case REG_TX_CUR_BUF: /* Transmit Current Buffer */
640 if (s->tx_desc_curr != 0) {
641 dma_memory_read(&s->dma_as, s->tx_desc_curr, &desc, sizeof(desc),
642 MEMTXATTRS_UNSPECIFIED);
643 value = desc.addr;
644 } else {
645 value = 0;
646 }
647 break;
648 case REG_RX_DMA_STA: /* Receive DMA Status */
649 break;
650 case REG_RX_CUR_DESC: /* Receive Current Descriptor */
651 value = s->rx_desc_curr;
652 break;
653 case REG_RX_CUR_BUF: /* Receive Current Buffer */
654 if (s->rx_desc_curr != 0) {
655 dma_memory_read(&s->dma_as, s->rx_desc_curr, &desc, sizeof(desc),
656 MEMTXATTRS_UNSPECIFIED);
657 value = desc.addr;
658 } else {
659 value = 0;
660 }
661 break;
662 case REG_RGMII_STA: /* RGMII Status */
663 break;
664 default:
665 qemu_log_mask(LOG_UNIMP, "allwinner-h3-emac: read access to unknown "
666 "EMAC register 0x" TARGET_FMT_plx "\n",
667 offset);
668 }
669
670 trace_allwinner_sun8i_emac_read(offset, value);
671 return value;
672 }
673
674 static void allwinner_sun8i_emac_write(void *opaque, hwaddr offset,
675 uint64_t value, unsigned size)
676 {
677 AwSun8iEmacState *s = AW_SUN8I_EMAC(opaque);
678 NetClientState *nc = qemu_get_queue(s->nic);
679
680 trace_allwinner_sun8i_emac_write(offset, value);
681
682 switch (offset) {
683 case REG_BASIC_CTL_0: /* Basic Control 0 */
684 s->basic_ctl0 = value;
685 break;
686 case REG_BASIC_CTL_1: /* Basic Control 1 */
687 if (value & BASIC_CTL1_SOFTRST) {
688 allwinner_sun8i_emac_reset(DEVICE(s));
689 value &= ~BASIC_CTL1_SOFTRST;
690 }
691 s->basic_ctl1 = value;
692 if (allwinner_sun8i_emac_can_receive(nc)) {
693 qemu_flush_queued_packets(nc);
694 }
695 break;
696 case REG_INT_STA: /* Interrupt Status */
697 s->int_sta &= ~value;
698 allwinner_sun8i_emac_update_irq(s);
699 break;
700 case REG_INT_EN: /* Interrupt Enable */
701 s->int_en = value;
702 allwinner_sun8i_emac_update_irq(s);
703 break;
704 case REG_TX_CTL_0: /* Transmit Control 0 */
705 s->tx_ctl0 = value;
706 break;
707 case REG_TX_CTL_1: /* Transmit Control 1 */
708 s->tx_ctl1 = value;
709 if (value & TX_CTL1_TX_DMA_EN) {
710 allwinner_sun8i_emac_transmit(s);
711 }
712 break;
713 case REG_TX_FLOW_CTL: /* Transmit Flow Control */
714 s->tx_flowctl = value;
715 break;
716 case REG_TX_DMA_DESC_LIST: /* Transmit Descriptor List Address */
717 s->tx_desc_head = value;
718 s->tx_desc_curr = value;
719 break;
720 case REG_RX_CTL_0: /* Receive Control 0 */
721 s->rx_ctl0 = value;
722 break;
723 case REG_RX_CTL_1: /* Receive Control 1 */
724 s->rx_ctl1 = value | RX_CTL1_RX_MD;
725 if ((value & RX_CTL1_RX_DMA_EN) &&
726 allwinner_sun8i_emac_can_receive(nc)) {
727 qemu_flush_queued_packets(nc);
728 }
729 break;
730 case REG_RX_DMA_DESC_LIST: /* Receive Descriptor List Address */
731 s->rx_desc_head = value;
732 s->rx_desc_curr = value;
733 break;
734 case REG_FRM_FLT: /* Receive Frame Filter */
735 s->frm_flt = value;
736 break;
737 case REG_RX_HASH_0: /* Receive Hash Table 0 */
738 case REG_RX_HASH_1: /* Receive Hash Table 1 */
739 break;
740 case REG_MII_CMD: /* Management Interface Command */
741 s->mii_cmd = value & ~MII_CMD_PHY_BUSY;
742 allwinner_sun8i_emac_mii_cmd(s);
743 break;
744 case REG_MII_DATA: /* Management Interface Data */
745 s->mii_data = value;
746 break;
747 case REG_ADDR_HIGH: /* MAC Address High */
748 stw_le_p(s->conf.macaddr.a + 4, value);
749 break;
750 case REG_ADDR_LOW: /* MAC Address Low */
751 stl_le_p(s->conf.macaddr.a, value);
752 break;
753 case REG_TX_DMA_STA: /* Transmit DMA Status */
754 case REG_TX_CUR_DESC: /* Transmit Current Descriptor */
755 case REG_TX_CUR_BUF: /* Transmit Current Buffer */
756 case REG_RX_DMA_STA: /* Receive DMA Status */
757 case REG_RX_CUR_DESC: /* Receive Current Descriptor */
758 case REG_RX_CUR_BUF: /* Receive Current Buffer */
759 case REG_RGMII_STA: /* RGMII Status */
760 break;
761 default:
762 qemu_log_mask(LOG_UNIMP, "allwinner-h3-emac: write access to unknown "
763 "EMAC register 0x" TARGET_FMT_plx "\n",
764 offset);
765 }
766 }
767
768 static void allwinner_sun8i_emac_set_link(NetClientState *nc)
769 {
770 AwSun8iEmacState *s = qemu_get_nic_opaque(nc);
771
772 trace_allwinner_sun8i_emac_set_link(!nc->link_down);
773 allwinner_sun8i_emac_mii_set_link(s, !nc->link_down);
774 }
775
776 static const MemoryRegionOps allwinner_sun8i_emac_mem_ops = {
777 .read = allwinner_sun8i_emac_read,
778 .write = allwinner_sun8i_emac_write,
779 .endianness = DEVICE_NATIVE_ENDIAN,
780 .valid = {
781 .min_access_size = 4,
782 .max_access_size = 4,
783 },
784 .impl.min_access_size = 4,
785 };
786
787 static NetClientInfo net_allwinner_sun8i_emac_info = {
788 .type = NET_CLIENT_DRIVER_NIC,
789 .size = sizeof(NICState),
790 .can_receive = allwinner_sun8i_emac_can_receive,
791 .receive = allwinner_sun8i_emac_receive,
792 .link_status_changed = allwinner_sun8i_emac_set_link,
793 };
794
795 static void allwinner_sun8i_emac_init(Object *obj)
796 {
797 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
798 AwSun8iEmacState *s = AW_SUN8I_EMAC(obj);
799
800 memory_region_init_io(&s->iomem, OBJECT(s), &allwinner_sun8i_emac_mem_ops,
801 s, TYPE_AW_SUN8I_EMAC, 64 * KiB);
802 sysbus_init_mmio(sbd, &s->iomem);
803 sysbus_init_irq(sbd, &s->irq);
804 }
805
806 static void allwinner_sun8i_emac_realize(DeviceState *dev, Error **errp)
807 {
808 AwSun8iEmacState *s = AW_SUN8I_EMAC(dev);
809
810 if (!s->dma_mr) {
811 error_setg(errp, TYPE_AW_SUN8I_EMAC " 'dma-memory' link not set");
812 return;
813 }
814
815 address_space_init(&s->dma_as, s->dma_mr, "emac-dma");
816
817 qemu_macaddr_default_if_unset(&s->conf.macaddr);
818 s->nic = qemu_new_nic(&net_allwinner_sun8i_emac_info, &s->conf,
819 object_get_typename(OBJECT(dev)), dev->id, s);
820 qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
821 }
822
823 static Property allwinner_sun8i_emac_properties[] = {
824 DEFINE_NIC_PROPERTIES(AwSun8iEmacState, conf),
825 DEFINE_PROP_UINT8("phy-addr", AwSun8iEmacState, mii_phy_addr, 0),
826 DEFINE_PROP_LINK("dma-memory", AwSun8iEmacState, dma_mr,
827 TYPE_MEMORY_REGION, MemoryRegion *),
828 DEFINE_PROP_END_OF_LIST(),
829 };
830
831 static int allwinner_sun8i_emac_post_load(void *opaque, int version_id)
832 {
833 AwSun8iEmacState *s = opaque;
834
835 allwinner_sun8i_emac_set_link(qemu_get_queue(s->nic));
836
837 return 0;
838 }
839
840 static const VMStateDescription vmstate_aw_emac = {
841 .name = "allwinner-sun8i-emac",
842 .version_id = 1,
843 .minimum_version_id = 1,
844 .post_load = allwinner_sun8i_emac_post_load,
845 .fields = (VMStateField[]) {
846 VMSTATE_UINT8(mii_phy_addr, AwSun8iEmacState),
847 VMSTATE_UINT32(mii_cmd, AwSun8iEmacState),
848 VMSTATE_UINT32(mii_data, AwSun8iEmacState),
849 VMSTATE_UINT32(mii_cr, AwSun8iEmacState),
850 VMSTATE_UINT32(mii_st, AwSun8iEmacState),
851 VMSTATE_UINT32(mii_adv, AwSun8iEmacState),
852 VMSTATE_UINT32(basic_ctl0, AwSun8iEmacState),
853 VMSTATE_UINT32(basic_ctl1, AwSun8iEmacState),
854 VMSTATE_UINT32(int_en, AwSun8iEmacState),
855 VMSTATE_UINT32(int_sta, AwSun8iEmacState),
856 VMSTATE_UINT32(frm_flt, AwSun8iEmacState),
857 VMSTATE_UINT32(rx_ctl0, AwSun8iEmacState),
858 VMSTATE_UINT32(rx_ctl1, AwSun8iEmacState),
859 VMSTATE_UINT32(rx_desc_head, AwSun8iEmacState),
860 VMSTATE_UINT32(rx_desc_curr, AwSun8iEmacState),
861 VMSTATE_UINT32(tx_ctl0, AwSun8iEmacState),
862 VMSTATE_UINT32(tx_ctl1, AwSun8iEmacState),
863 VMSTATE_UINT32(tx_desc_head, AwSun8iEmacState),
864 VMSTATE_UINT32(tx_desc_curr, AwSun8iEmacState),
865 VMSTATE_UINT32(tx_flowctl, AwSun8iEmacState),
866 VMSTATE_END_OF_LIST()
867 }
868 };
869
870 static void allwinner_sun8i_emac_class_init(ObjectClass *klass, void *data)
871 {
872 DeviceClass *dc = DEVICE_CLASS(klass);
873
874 dc->realize = allwinner_sun8i_emac_realize;
875 dc->reset = allwinner_sun8i_emac_reset;
876 dc->vmsd = &vmstate_aw_emac;
877 device_class_set_props(dc, allwinner_sun8i_emac_properties);
878 }
879
880 static const TypeInfo allwinner_sun8i_emac_info = {
881 .name = TYPE_AW_SUN8I_EMAC,
882 .parent = TYPE_SYS_BUS_DEVICE,
883 .instance_size = sizeof(AwSun8iEmacState),
884 .instance_init = allwinner_sun8i_emac_init,
885 .class_init = allwinner_sun8i_emac_class_init,
886 };
887
888 static void allwinner_sun8i_emac_register_types(void)
889 {
890 type_register_static(&allwinner_sun8i_emac_info);
891 }
892
893 type_init(allwinner_sun8i_emac_register_types)
QEmu