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s390x: upgrade status of KVM cores to "supported"
[qemu/ar7.git] / hw / net / sungem.c
blob60f1e479f378efeb7355e60a8fb548dc1dc55a6c
1 /*
2 * QEMU model of SUN GEM ethernet controller
3 *
4 * As found in Apple ASICs among others
5 *
6 * Copyright 2016 Ben Herrenschmidt
7 * Copyright 2017 Mark Cave-Ayland
8 */
9
10 #include "qemu/osdep.h"
11 #include "hw/pci/pci.h"
12 #include "qemu/log.h"
13 #include "net/net.h"
14 #include "net/eth.h"
15 #include "net/checksum.h"
16 #include "hw/net/mii.h"
17 #include "sysemu/sysemu.h"
18 #include "trace.h"
19
20 #define TYPE_SUNGEM "sungem"
21
22 #define SUNGEM(obj) OBJECT_CHECK(SunGEMState, (obj), TYPE_SUNGEM)
23
24 #define MAX_PACKET_SIZE 9016
25
26 #define SUNGEM_MMIO_SIZE 0x200000
27
28 /* Global registers */
29 #define SUNGEM_MMIO_GREG_SIZE 0x2000
30
31 #define GREG_SEBSTATE 0x0000UL /* SEB State Register */
32
33 #define GREG_STAT 0x000CUL /* Status Register */
34 #define GREG_STAT_TXINTME 0x00000001 /* TX INTME frame transferred */
35 #define GREG_STAT_TXALL 0x00000002 /* All TX frames transferred */
36 #define GREG_STAT_TXDONE 0x00000004 /* One TX frame transferred */
37 #define GREG_STAT_RXDONE 0x00000010 /* One RX frame arrived */
38 #define GREG_STAT_RXNOBUF 0x00000020 /* No free RX buffers available */
39 #define GREG_STAT_RXTAGERR 0x00000040 /* RX tag framing is corrupt */
40 #define GREG_STAT_TXMAC 0x00004000 /* TX MAC signalled interrupt */
41 #define GREG_STAT_RXMAC 0x00008000 /* RX MAC signalled interrupt */
42 #define GREG_STAT_MAC 0x00010000 /* MAC Control signalled irq */
43 #define GREG_STAT_TXNR 0xfff80000 /* == TXDMA_TXDONE reg val */
44 #define GREG_STAT_TXNR_SHIFT 19
45
46 /* These interrupts are edge latches in the status register,
47 * reading it (or writing the corresponding bit in IACK) will
48 * clear them
49 */
50 #define GREG_STAT_LATCH (GREG_STAT_TXALL | GREG_STAT_TXINTME | \
51 GREG_STAT_RXDONE | GREG_STAT_RXDONE | \
52 GREG_STAT_RXNOBUF | GREG_STAT_RXTAGERR)
53
54 #define GREG_IMASK 0x0010UL /* Interrupt Mask Register */
55 #define GREG_IACK 0x0014UL /* Interrupt ACK Register */
56 #define GREG_STAT2 0x001CUL /* Alias of GREG_STAT */
57 #define GREG_PCIESTAT 0x1000UL /* PCI Error Status Register */
58 #define GREG_PCIEMASK 0x1004UL /* PCI Error Mask Register */
59
60 #define GREG_SWRST 0x1010UL /* Software Reset Register */
61 #define GREG_SWRST_TXRST 0x00000001 /* TX Software Reset */
62 #define GREG_SWRST_RXRST 0x00000002 /* RX Software Reset */
63 #define GREG_SWRST_RSTOUT 0x00000004 /* Force RST# pin active */
64
65 /* TX DMA Registers */
66 #define SUNGEM_MMIO_TXDMA_SIZE 0x1000
67
68 #define TXDMA_KICK 0x0000UL /* TX Kick Register */
69
70 #define TXDMA_CFG 0x0004UL /* TX Configuration Register */
71 #define TXDMA_CFG_ENABLE 0x00000001 /* Enable TX DMA channel */
72 #define TXDMA_CFG_RINGSZ 0x0000001e /* TX descriptor ring size */
73
74 #define TXDMA_DBLOW 0x0008UL /* TX Desc. Base Low */
75 #define TXDMA_DBHI 0x000CUL /* TX Desc. Base High */
76 #define TXDMA_PCNT 0x0024UL /* TX FIFO Packet Counter */
77 #define TXDMA_SMACHINE 0x0028UL /* TX State Machine Register */
78 #define TXDMA_DPLOW 0x0030UL /* TX Data Pointer Low */
79 #define TXDMA_DPHI 0x0034UL /* TX Data Pointer High */
80 #define TXDMA_TXDONE 0x0100UL /* TX Completion Register */
81 #define TXDMA_FTAG 0x0108UL /* TX FIFO Tag */
82 #define TXDMA_FSZ 0x0118UL /* TX FIFO Size */
83
84 /* Receive DMA Registers */
85 #define SUNGEM_MMIO_RXDMA_SIZE 0x2000
86
87 #define RXDMA_CFG 0x0000UL /* RX Configuration Register */
88 #define RXDMA_CFG_ENABLE 0x00000001 /* Enable RX DMA channel */
89 #define RXDMA_CFG_RINGSZ 0x0000001e /* RX descriptor ring size */
90 #define RXDMA_CFG_FBOFF 0x00001c00 /* Offset of first data byte */
91 #define RXDMA_CFG_CSUMOFF 0x000fe000 /* Skip bytes before csum calc */
92
93 #define RXDMA_DBLOW 0x0004UL /* RX Descriptor Base Low */
94 #define RXDMA_DBHI 0x0008UL /* RX Descriptor Base High */
95 #define RXDMA_PCNT 0x0018UL /* RX FIFO Packet Counter */
96 #define RXDMA_SMACHINE 0x001CUL /* RX State Machine Register */
97 #define RXDMA_PTHRESH 0x0020UL /* Pause Thresholds */
98 #define RXDMA_DPLOW 0x0024UL /* RX Data Pointer Low */
99 #define RXDMA_DPHI 0x0028UL /* RX Data Pointer High */
100 #define RXDMA_KICK 0x0100UL /* RX Kick Register */
101 #define RXDMA_DONE 0x0104UL /* RX Completion Register */
102 #define RXDMA_BLANK 0x0108UL /* RX Blanking Register */
103 #define RXDMA_FTAG 0x0110UL /* RX FIFO Tag */
104 #define RXDMA_FSZ 0x0120UL /* RX FIFO Size */
105
106 /* MAC Registers */
107 #define SUNGEM_MMIO_MAC_SIZE 0x200
108
109 #define MAC_TXRST 0x0000UL /* TX MAC Software Reset Command */
110 #define MAC_RXRST 0x0004UL /* RX MAC Software Reset Command */
111 #define MAC_TXSTAT 0x0010UL /* TX MAC Status Register */
112 #define MAC_RXSTAT 0x0014UL /* RX MAC Status Register */
113
114 #define MAC_CSTAT 0x0018UL /* MAC Control Status Register */
115 #define MAC_CSTAT_PTR 0xffff0000 /* Pause Time Received */
116
117 #define MAC_TXMASK 0x0020UL /* TX MAC Mask Register */
118 #define MAC_RXMASK 0x0024UL /* RX MAC Mask Register */
119 #define MAC_MCMASK 0x0028UL /* MAC Control Mask Register */
120
121 #define MAC_TXCFG 0x0030UL /* TX MAC Configuration Register */
122 #define MAC_TXCFG_ENAB 0x00000001 /* TX MAC Enable */
123
124 #define MAC_RXCFG 0x0034UL /* RX MAC Configuration Register */
125 #define MAC_RXCFG_ENAB 0x00000001 /* RX MAC Enable */
126 #define MAC_RXCFG_SFCS 0x00000004 /* Strip FCS */
127 #define MAC_RXCFG_PROM 0x00000008 /* Promiscuous Mode */
128 #define MAC_RXCFG_PGRP 0x00000010 /* Promiscuous Group */
129 #define MAC_RXCFG_HFE 0x00000020 /* Hash Filter Enable */
130
131 #define MAC_XIFCFG 0x003CUL /* XIF Configuration Register */
132 #define MAC_XIFCFG_LBCK 0x00000002 /* Loopback TX to RX */
133
134 #define MAC_MINFSZ 0x0050UL /* MinFrameSize Register */
135 #define MAC_MAXFSZ 0x0054UL /* MaxFrameSize Register */
136 #define MAC_ADDR0 0x0080UL /* MAC Address 0 Register */
137 #define MAC_ADDR1 0x0084UL /* MAC Address 1 Register */
138 #define MAC_ADDR2 0x0088UL /* MAC Address 2 Register */
139 #define MAC_ADDR3 0x008CUL /* MAC Address 3 Register */
140 #define MAC_ADDR4 0x0090UL /* MAC Address 4 Register */
141 #define MAC_ADDR5 0x0094UL /* MAC Address 5 Register */
142 #define MAC_HASH0 0x00C0UL /* Hash Table 0 Register */
143 #define MAC_PATMPS 0x0114UL /* Peak Attempts Register */
144 #define MAC_SMACHINE 0x0134UL /* State Machine Register */
145
146 /* MIF Registers */
147 #define SUNGEM_MMIO_MIF_SIZE 0x20
148
149 #define MIF_FRAME 0x000CUL /* MIF Frame/Output Register */
150 #define MIF_FRAME_OP 0x30000000 /* OPcode */
151 #define MIF_FRAME_PHYAD 0x0f800000 /* PHY ADdress */
152 #define MIF_FRAME_REGAD 0x007c0000 /* REGister ADdress */
153 #define MIF_FRAME_TALSB 0x00010000 /* Turn Around LSB */
154 #define MIF_FRAME_DATA 0x0000ffff /* Instruction Payload */
155
156 #define MIF_CFG 0x0010UL /* MIF Configuration Register */
157 #define MIF_CFG_MDI0 0x00000100 /* MDIO_0 present or read-bit */
158 #define MIF_CFG_MDI1 0x00000200 /* MDIO_1 present or read-bit */
159
160 #define MIF_STATUS 0x0018UL /* MIF Status Register */
161 #define MIF_SMACHINE 0x001CUL /* MIF State Machine Register */
162
163 /* PCS/Serialink Registers */
164 #define SUNGEM_MMIO_PCS_SIZE 0x60
165 #define PCS_MIISTAT 0x0004UL /* PCS MII Status Register */
166 #define PCS_ISTAT 0x0018UL /* PCS Interrupt Status Reg */
167 #define PCS_SSTATE 0x005CUL /* Serialink State Register */
168
169 /* Descriptors */
170 struct gem_txd {
171 uint64_t control_word;
172 uint64_t buffer;
173 };
174
175 #define TXDCTRL_BUFSZ 0x0000000000007fffULL /* Buffer Size */
176 #define TXDCTRL_CSTART 0x00000000001f8000ULL /* CSUM Start Offset */
177 #define TXDCTRL_COFF 0x000000001fe00000ULL /* CSUM Stuff Offset */
178 #define TXDCTRL_CENAB 0x0000000020000000ULL /* CSUM Enable */
179 #define TXDCTRL_EOF 0x0000000040000000ULL /* End of Frame */
180 #define TXDCTRL_SOF 0x0000000080000000ULL /* Start of Frame */
181 #define TXDCTRL_INTME 0x0000000100000000ULL /* "Interrupt Me" */
182
183 struct gem_rxd {
184 uint64_t status_word;
185 uint64_t buffer;
186 };
187
188 #define RXDCTRL_HPASS 0x1000000000000000ULL /* Passed Hash Filter */
189 #define RXDCTRL_ALTMAC 0x2000000000000000ULL /* Matched ALT MAC */
190
191
192 typedef struct {
193 PCIDevice pdev;
194
195 MemoryRegion sungem;
196 MemoryRegion greg;
197 MemoryRegion txdma;
198 MemoryRegion rxdma;
199 MemoryRegion mac;
200 MemoryRegion mif;
201 MemoryRegion pcs;
202 NICState *nic;
203 NICConf conf;
204 uint32_t phy_addr;
205
206 uint32_t gregs[SUNGEM_MMIO_GREG_SIZE >> 2];
207 uint32_t txdmaregs[SUNGEM_MMIO_TXDMA_SIZE >> 2];
208 uint32_t rxdmaregs[SUNGEM_MMIO_RXDMA_SIZE >> 2];
209 uint32_t macregs[SUNGEM_MMIO_MAC_SIZE >> 2];
210 uint32_t mifregs[SUNGEM_MMIO_MIF_SIZE >> 2];
211 uint32_t pcsregs[SUNGEM_MMIO_PCS_SIZE >> 2];
212
213 /* Cache some useful things */
214 uint32_t rx_mask;
215 uint32_t tx_mask;
216
217 /* Current tx packet */
218 uint8_t tx_data[MAX_PACKET_SIZE];
219 uint32_t tx_size;
220 uint64_t tx_first_ctl;
221 } SunGEMState;
222
223
224 static void sungem_eval_irq(SunGEMState *s)
225 {
226 uint32_t stat, mask;
227
228 mask = s->gregs[GREG_IMASK >> 2];
229 stat = s->gregs[GREG_STAT >> 2] & ~GREG_STAT_TXNR;
230 if (stat & ~mask) {
231 pci_set_irq(PCI_DEVICE(s), 1);
232 } else {
233 pci_set_irq(PCI_DEVICE(s), 0);
234 }
235 }
236
237 static void sungem_update_status(SunGEMState *s, uint32_t bits, bool val)
238 {
239 uint32_t stat;
240
241 stat = s->gregs[GREG_STAT >> 2];
242 if (val) {
243 stat |= bits;
244 } else {
245 stat &= ~bits;
246 }
247 s->gregs[GREG_STAT >> 2] = stat;
248 sungem_eval_irq(s);
249 }
250
251 static void sungem_eval_cascade_irq(SunGEMState *s)
252 {
253 uint32_t stat, mask;
254
255 mask = s->macregs[MAC_TXSTAT >> 2];
256 stat = s->macregs[MAC_TXMASK >> 2];
257 if (stat & ~mask) {
258 sungem_update_status(s, GREG_STAT_TXMAC, true);
259 } else {
260 sungem_update_status(s, GREG_STAT_TXMAC, false);
261 }
262
263 mask = s->macregs[MAC_RXSTAT >> 2];
264 stat = s->macregs[MAC_RXMASK >> 2];
265 if (stat & ~mask) {
266 sungem_update_status(s, GREG_STAT_RXMAC, true);
267 } else {
268 sungem_update_status(s, GREG_STAT_RXMAC, false);
269 }
270
271 mask = s->macregs[MAC_CSTAT >> 2];
272 stat = s->macregs[MAC_MCMASK >> 2] & ~MAC_CSTAT_PTR;
273 if (stat & ~mask) {
274 sungem_update_status(s, GREG_STAT_MAC, true);
275 } else {
276 sungem_update_status(s, GREG_STAT_MAC, false);
277 }
278 }
279
280 static void sungem_do_tx_csum(SunGEMState *s)
281 {
282 uint16_t start, off;
283 uint32_t csum;
284
285 start = (s->tx_first_ctl & TXDCTRL_CSTART) >> 15;
286 off = (s->tx_first_ctl & TXDCTRL_COFF) >> 21;
287
288 trace_sungem_tx_checksum(start, off);
289
290 if (start > (s->tx_size - 2) || off > (s->tx_size - 2)) {
291 trace_sungem_tx_checksum_oob();
292 return;
293 }
294
295 csum = net_raw_checksum(s->tx_data + start, s->tx_size - start);
296 stw_be_p(s->tx_data + off, csum);
297 }
298
299 static void sungem_send_packet(SunGEMState *s, const uint8_t *buf,
300 int size)
301 {
302 NetClientState *nc = qemu_get_queue(s->nic);
303
304 if (s->macregs[MAC_XIFCFG >> 2] & MAC_XIFCFG_LBCK) {
305 nc->info->receive(nc, buf, size);
306 } else {
307 qemu_send_packet(nc, buf, size);
308 }
309 }
310
311 static void sungem_process_tx_desc(SunGEMState *s, struct gem_txd *desc)
312 {
313 PCIDevice *d = PCI_DEVICE(s);
314 uint32_t len;
315
316 /* If it's a start of frame, discard anything we had in the
317 * buffer and start again. This should be an error condition
318 * if we had something ... for now we ignore it
319 */
320 if (desc->control_word & TXDCTRL_SOF) {
321 if (s->tx_first_ctl) {
322 trace_sungem_tx_unfinished();
323 }
324 s->tx_size = 0;
325 s->tx_first_ctl = desc->control_word;
326 }
327
328 /* Grab data size */
329 len = desc->control_word & TXDCTRL_BUFSZ;
330
331 /* Clamp it to our max size */
332 if ((s->tx_size + len) > MAX_PACKET_SIZE) {
333 trace_sungem_tx_overflow();
334 len = MAX_PACKET_SIZE - s->tx_size;
335 }
336
337 /* Read the data */
338 pci_dma_read(d, desc->buffer, &s->tx_data[s->tx_size], len);
339 s->tx_size += len;
340
341 /* If end of frame, send packet */
342 if (desc->control_word & TXDCTRL_EOF) {
343 trace_sungem_tx_finished(s->tx_size);
344
345 /* Handle csum */
346 if (s->tx_first_ctl & TXDCTRL_CENAB) {
347 sungem_do_tx_csum(s);
348 }
349
350 /* Send it */
351 sungem_send_packet(s, s->tx_data, s->tx_size);
352
353 /* No more pending packet */
354 s->tx_size = 0;
355 s->tx_first_ctl = 0;
356 }
357 }
358
359 static void sungem_tx_kick(SunGEMState *s)
360 {
361 PCIDevice *d = PCI_DEVICE(s);
362 uint32_t comp, kick;
363 uint32_t txdma_cfg, txmac_cfg, ints;
364 uint64_t dbase;
365
366 trace_sungem_tx_kick();
367
368 /* Check that both TX MAC and TX DMA are enabled. We don't
369 * handle DMA-less direct FIFO operations (we don't emulate
370 * the FIFO at all).
371 *
372 * A write to TXDMA_KICK while DMA isn't enabled can happen
373 * when the driver is resetting the pointer.
374 */
375 txdma_cfg = s->txdmaregs[TXDMA_CFG >> 2];
376 txmac_cfg = s->macregs[MAC_TXCFG >> 2];
377 if (!(txdma_cfg & TXDMA_CFG_ENABLE) ||
378 !(txmac_cfg & MAC_TXCFG_ENAB)) {
379 trace_sungem_tx_disabled();
380 return;
381 }
382
383 /* XXX Test min frame size register ? */
384 /* XXX Test max frame size register ? */
385
386 dbase = s->txdmaregs[TXDMA_DBHI >> 2];
387 dbase = (dbase << 32) | s->txdmaregs[TXDMA_DBLOW >> 2];
388
389 comp = s->txdmaregs[TXDMA_TXDONE >> 2] & s->tx_mask;
390 kick = s->txdmaregs[TXDMA_KICK >> 2] & s->tx_mask;
391
392 trace_sungem_tx_process(comp, kick, s->tx_mask + 1);
393
394 /* This is rather primitive for now, we just send everything we
395 * can in one go, like e1000. Ideally we should do the sending
396 * from some kind of background task
397 */
398 while (comp != kick) {
399 struct gem_txd desc;
400
401 /* Read the next descriptor */
402 pci_dma_read(d, dbase + comp * sizeof(desc), &desc, sizeof(desc));
403
404 /* Byteswap descriptor */
405 desc.control_word = le64_to_cpu(desc.control_word);
406 desc.buffer = le64_to_cpu(desc.buffer);
407 trace_sungem_tx_desc(comp, desc.control_word, desc.buffer);
408
409 /* Send it for processing */
410 sungem_process_tx_desc(s, &desc);
411
412 /* Interrupt */
413 ints = GREG_STAT_TXDONE;
414 if (desc.control_word & TXDCTRL_INTME) {
415 ints |= GREG_STAT_TXINTME;
416 }
417 sungem_update_status(s, ints, true);
418
419 /* Next ! */
420 comp = (comp + 1) & s->tx_mask;
421 s->txdmaregs[TXDMA_TXDONE >> 2] = comp;
422 }
423
424 /* We sent everything, set status/irq bit */
425 sungem_update_status(s, GREG_STAT_TXALL, true);
426 }
427
428 static bool sungem_rx_full(SunGEMState *s, uint32_t kick, uint32_t done)
429 {
430 return kick == ((done + 1) & s->rx_mask);
431 }
432
433 static int sungem_can_receive(NetClientState *nc)
434 {
435 SunGEMState *s = qemu_get_nic_opaque(nc);
436 uint32_t kick, done, rxdma_cfg, rxmac_cfg;
437 bool full;
438
439 rxmac_cfg = s->macregs[MAC_RXCFG >> 2];
440 rxdma_cfg = s->rxdmaregs[RXDMA_CFG >> 2];
441
442 /* If MAC disabled, can't receive */
443 if ((rxmac_cfg & MAC_RXCFG_ENAB) == 0) {
444 trace_sungem_rx_mac_disabled();
445 return 0;
446 }
447 if ((rxdma_cfg & RXDMA_CFG_ENABLE) == 0) {
448 trace_sungem_rx_txdma_disabled();
449 return 0;
450 }
451
452 /* Check RX availability */
453 kick = s->rxdmaregs[RXDMA_KICK >> 2];
454 done = s->rxdmaregs[RXDMA_DONE >> 2];
455 full = sungem_rx_full(s, kick, done);
456
457 trace_sungem_rx_check(!full, kick, done);
458
459 return !full;
460 }
461
462 enum {
463 rx_no_match,
464 rx_match_promisc,
465 rx_match_bcast,
466 rx_match_allmcast,
467 rx_match_mcast,
468 rx_match_mac,
469 rx_match_altmac,
470 };
471
472 static int sungem_check_rx_mac(SunGEMState *s, const uint8_t *mac, uint32_t crc)
473 {
474 uint32_t rxcfg = s->macregs[MAC_RXCFG >> 2];
475 uint32_t mac0, mac1, mac2;
476
477 /* Promisc enabled ? */
478 if (rxcfg & MAC_RXCFG_PROM) {
479 return rx_match_promisc;
480 }
481
482 /* Format MAC address into dwords */
483 mac0 = (mac[4] << 8) | mac[5];
484 mac1 = (mac[2] << 8) | mac[3];
485 mac2 = (mac[0] << 8) | mac[1];
486
487 trace_sungem_rx_mac_check(mac0, mac1, mac2);
488
489 /* Is this a broadcast frame ? */
490 if (mac0 == 0xffff && mac1 == 0xffff && mac2 == 0xffff) {
491 return rx_match_bcast;
492 }
493
494 /* TODO: Implement address filter registers (or we don't care ?) */
495
496 /* Is this a multicast frame ? */
497 if (mac[0] & 1) {
498 trace_sungem_rx_mac_multicast();
499
500 /* Promisc group enabled ? */
501 if (rxcfg & MAC_RXCFG_PGRP) {
502 return rx_match_allmcast;
503 }
504
505 /* TODO: Check MAC control frames (or we don't care) ? */
506
507 /* Check hash filter (somebody check that's correct ?) */
508 if (rxcfg & MAC_RXCFG_HFE) {
509 uint32_t hash, idx;
510
511 crc >>= 24;
512 idx = (crc >> 2) & 0x3c;
513 hash = s->macregs[(MAC_HASH0 + idx) >> 2];
514 if (hash & (1 << (15 - (crc & 0xf)))) {
515 return rx_match_mcast;
516 }
517 }
518 return rx_no_match;
519 }
520
521 /* Main MAC check */
522 trace_sungem_rx_mac_compare(s->macregs[MAC_ADDR0 >> 2],
523 s->macregs[MAC_ADDR1 >> 2],
524 s->macregs[MAC_ADDR2 >> 2]);
525
526 if (mac0 == s->macregs[MAC_ADDR0 >> 2] &&
527 mac1 == s->macregs[MAC_ADDR1 >> 2] &&
528 mac2 == s->macregs[MAC_ADDR2 >> 2]) {
529 return rx_match_mac;
530 }
531
532 /* Alt MAC check */
533 if (mac0 == s->macregs[MAC_ADDR3 >> 2] &&
534 mac1 == s->macregs[MAC_ADDR4 >> 2] &&
535 mac2 == s->macregs[MAC_ADDR5 >> 2]) {
536 return rx_match_altmac;
537 }
538
539 return rx_no_match;
540 }
541
542 static ssize_t sungem_receive(NetClientState *nc, const uint8_t *buf,
543 size_t size)
544 {
545 SunGEMState *s = qemu_get_nic_opaque(nc);
546 PCIDevice *d = PCI_DEVICE(s);
547 uint32_t mac_crc, done, kick, max_fsize;
548 uint32_t fcs_size, ints, rxdma_cfg, rxmac_cfg, csum, coff;
549 uint8_t smallbuf[60];
550 struct gem_rxd desc;
551 uint64_t dbase, baddr;
552 unsigned int rx_cond;
553
554 trace_sungem_rx_packet(size);
555
556 rxmac_cfg = s->macregs[MAC_RXCFG >> 2];
557 rxdma_cfg = s->rxdmaregs[RXDMA_CFG >> 2];
558 max_fsize = s->macregs[MAC_MAXFSZ >> 2] & 0x7fff;
559
560 /* If MAC or DMA disabled, can't receive */
561 if (!(rxdma_cfg & RXDMA_CFG_ENABLE) ||
562 !(rxmac_cfg & MAC_RXCFG_ENAB)) {
563 trace_sungem_rx_disabled();
564 return 0;
565 }
566
567 /* Size adjustment for FCS */
568 if (rxmac_cfg & MAC_RXCFG_SFCS) {
569 fcs_size = 0;
570 } else {
571 fcs_size = 4;
572 }
573
574 /* Discard frame smaller than a MAC or larger than max frame size
575 * (when accounting for FCS)
576 */
577 if (size < 6 || (size + 4) > max_fsize) {
578 trace_sungem_rx_bad_frame_size(size);
579 /* XXX Increment error statistics ? */
580 return size;
581 }
582
583 /* We don't drop too small frames since we get them in qemu, we pad
584 * them instead. We should probably use the min frame size register
585 * but I don't want to use a variable size staging buffer and I
586 * know both MacOS and Linux use the default 64 anyway. We use 60
587 * here to account for the non-existent FCS.
588 */
589 if (size < 60) {
590 memcpy(smallbuf, buf, size);
591 memset(&smallbuf[size], 0, 60 - size);
592 buf = smallbuf;
593 size = 60;
594 }
595
596 /* Get MAC crc */
597 mac_crc = net_crc32_le(buf, ETH_ALEN);
598
599 /* Packet isn't for me ? */
600 rx_cond = sungem_check_rx_mac(s, buf, mac_crc);
601 if (rx_cond == rx_no_match) {
602 /* Just drop it */
603 trace_sungem_rx_unmatched();
604 return size;
605 }
606
607 /* Get ring pointers */
608 kick = s->rxdmaregs[RXDMA_KICK >> 2] & s->rx_mask;
609 done = s->rxdmaregs[RXDMA_DONE >> 2] & s->rx_mask;
610
611 trace_sungem_rx_process(done, kick, s->rx_mask + 1);
612
613 /* Ring full ? Can't receive */
614 if (sungem_rx_full(s, kick, done)) {
615 trace_sungem_rx_ringfull();
616 return 0;
617 }
618
619 /* Note: The real GEM will fetch descriptors in blocks of 4,
620 * for now we handle them one at a time, I think the driver will
621 * cope
622 */
623
624 dbase = s->rxdmaregs[RXDMA_DBHI >> 2];
625 dbase = (dbase << 32) | s->rxdmaregs[RXDMA_DBLOW >> 2];
626
627 /* Read the next descriptor */
628 pci_dma_read(d, dbase + done * sizeof(desc), &desc, sizeof(desc));
629
630 trace_sungem_rx_desc(le64_to_cpu(desc.status_word),
631 le64_to_cpu(desc.buffer));
632
633 /* Effective buffer address */
634 baddr = le64_to_cpu(desc.buffer) & ~7ull;
635 baddr |= (rxdma_cfg & RXDMA_CFG_FBOFF) >> 10;
636
637 /* Write buffer out */
638 pci_dma_write(d, baddr, buf, size);
639
640 if (fcs_size) {
641 /* Should we add an FCS ? Linux doesn't ask us to strip it,
642 * however I believe nothing checks it... For now we just
643 * do nothing. It's faster this way.
644 */
645 }
646
647 /* Calculate the checksum */
648 coff = (rxdma_cfg & RXDMA_CFG_CSUMOFF) >> 13;
649 csum = net_raw_checksum((uint8_t *)buf + coff, size - coff);
650
651 /* Build the updated descriptor */
652 desc.status_word = (size + fcs_size) << 16;
653 desc.status_word |= ((uint64_t)(mac_crc >> 16)) << 44;
654 desc.status_word |= csum;
655 if (rx_cond == rx_match_mcast) {
656 desc.status_word |= RXDCTRL_HPASS;
657 }
658 if (rx_cond == rx_match_altmac) {
659 desc.status_word |= RXDCTRL_ALTMAC;
660 }
661 desc.status_word = cpu_to_le64(desc.status_word);
662
663 pci_dma_write(d, dbase + done * sizeof(desc), &desc, sizeof(desc));
664
665 done = (done + 1) & s->rx_mask;
666 s->rxdmaregs[RXDMA_DONE >> 2] = done;
667
668 /* XXX Unconditionally set RX interrupt for now. The interrupt
669 * mitigation timer might well end up adding more overhead than
670 * helping here...
671 */
672 ints = GREG_STAT_RXDONE;
673 if (sungem_rx_full(s, kick, done)) {
674 ints |= GREG_STAT_RXNOBUF;
675 }
676 sungem_update_status(s, ints, true);
677
678 return size;
679 }
680
681 static void sungem_set_link_status(NetClientState *nc)
682 {
683 /* We don't do anything for now as I believe none of the OSes
684 * drivers use the MIF autopoll feature nor the PHY interrupt
685 */
686 }
687
688 static void sungem_update_masks(SunGEMState *s)
689 {
690 uint32_t sz;
691
692 sz = 1 << (((s->rxdmaregs[RXDMA_CFG >> 2] & RXDMA_CFG_RINGSZ) >> 1) + 5);
693 s->rx_mask = sz - 1;
694
695 sz = 1 << (((s->txdmaregs[TXDMA_CFG >> 2] & TXDMA_CFG_RINGSZ) >> 1) + 5);
696 s->tx_mask = sz - 1;
697 }
698
699 static void sungem_reset_rx(SunGEMState *s)
700 {
701 trace_sungem_rx_reset();
702
703 /* XXX Do RXCFG */
704 /* XXX Check value */
705 s->rxdmaregs[RXDMA_FSZ >> 2] = 0x140;
706 s->rxdmaregs[RXDMA_DONE >> 2] = 0;
707 s->rxdmaregs[RXDMA_KICK >> 2] = 0;
708 s->rxdmaregs[RXDMA_CFG >> 2] = 0x1000010;
709 s->rxdmaregs[RXDMA_PTHRESH >> 2] = 0xf8;
710 s->rxdmaregs[RXDMA_BLANK >> 2] = 0;
711
712 sungem_update_masks(s);
713 }
714
715 static void sungem_reset_tx(SunGEMState *s)
716 {
717 trace_sungem_tx_reset();
718
719 /* XXX Do TXCFG */
720 /* XXX Check value */
721 s->txdmaregs[TXDMA_FSZ >> 2] = 0x90;
722 s->txdmaregs[TXDMA_TXDONE >> 2] = 0;
723 s->txdmaregs[TXDMA_KICK >> 2] = 0;
724 s->txdmaregs[TXDMA_CFG >> 2] = 0x118010;
725
726 sungem_update_masks(s);
727
728 s->tx_size = 0;
729 s->tx_first_ctl = 0;
730 }
731
732 static void sungem_reset_all(SunGEMState *s, bool pci_reset)
733 {
734 trace_sungem_reset(pci_reset);
735
736 sungem_reset_rx(s);
737 sungem_reset_tx(s);
738
739 s->gregs[GREG_IMASK >> 2] = 0xFFFFFFF;
740 s->gregs[GREG_STAT >> 2] = 0;
741 if (pci_reset) {
742 uint8_t *ma = s->conf.macaddr.a;
743
744 s->gregs[GREG_SWRST >> 2] = 0;
745 s->macregs[MAC_ADDR0 >> 2] = (ma[4] << 8) | ma[5];
746 s->macregs[MAC_ADDR1 >> 2] = (ma[2] << 8) | ma[3];
747 s->macregs[MAC_ADDR2 >> 2] = (ma[0] << 8) | ma[1];
748 } else {
749 s->gregs[GREG_SWRST >> 2] &= GREG_SWRST_RSTOUT;
750 }
751 s->mifregs[MIF_CFG >> 2] = MIF_CFG_MDI0;
752 }
753
754 static void sungem_mii_write(SunGEMState *s, uint8_t phy_addr,
755 uint8_t reg_addr, uint16_t val)
756 {
757 trace_sungem_mii_write(phy_addr, reg_addr, val);
758
759 /* XXX TODO */
760 }
761
762 static uint16_t __sungem_mii_read(SunGEMState *s, uint8_t phy_addr,
763 uint8_t reg_addr)
764 {
765 if (phy_addr != s->phy_addr) {
766 return 0xffff;
767 }
768 /* Primitive emulation of a BCM5201 to please the driver,
769 * ID is 0x00406210. TODO: Do a gigabit PHY like BCM5400
770 */
771 switch (reg_addr) {
772 case MII_BMCR:
773 return 0;
774 case MII_PHYID1:
775 return 0x0040;
776 case MII_PHYID2:
777 return 0x6210;
778 case MII_BMSR:
779 if (qemu_get_queue(s->nic)->link_down) {
780 return MII_BMSR_100TX_FD | MII_BMSR_AUTONEG;
781 } else {
782 return MII_BMSR_100TX_FD | MII_BMSR_AN_COMP |
783 MII_BMSR_AUTONEG | MII_BMSR_LINK_ST;
784 }
785 case MII_ANLPAR:
786 case MII_ANAR:
787 return MII_ANLPAR_TXFD;
788 case 0x18: /* 5201 AUX status */
789 return 3; /* 100FD */
790 default:
791 return 0;
792 };
793 }
794 static uint16_t sungem_mii_read(SunGEMState *s, uint8_t phy_addr,
795 uint8_t reg_addr)
796 {
797 uint16_t val;
798
799 val = __sungem_mii_read(s, phy_addr, reg_addr);
800
801 trace_sungem_mii_read(phy_addr, reg_addr, val);
802
803 return val;
804 }
805
806 static uint32_t sungem_mii_op(SunGEMState *s, uint32_t val)
807 {
808 uint8_t phy_addr, reg_addr, op;
809
810 /* Ignore not start of frame */
811 if ((val >> 30) != 1) {
812 trace_sungem_mii_invalid_sof(val >> 30);
813 return 0xffff;
814 }
815 phy_addr = (val & MIF_FRAME_PHYAD) >> 23;
816 reg_addr = (val & MIF_FRAME_REGAD) >> 18;
817 op = (val & MIF_FRAME_OP) >> 28;
818 switch (op) {
819 case 1:
820 sungem_mii_write(s, phy_addr, reg_addr, val & MIF_FRAME_DATA);
821 return val | MIF_FRAME_TALSB;
822 case 2:
823 return sungem_mii_read(s, phy_addr, reg_addr) | MIF_FRAME_TALSB;
824 default:
825 trace_sungem_mii_invalid_op(op);
826 }
827 return 0xffff | MIF_FRAME_TALSB;
828 }
829
830 static void sungem_mmio_greg_write(void *opaque, hwaddr addr, uint64_t val,
831 unsigned size)
832 {
833 SunGEMState *s = opaque;
834
835 if (!(addr < 0x20) && !(addr >= 0x1000 && addr <= 0x1010)) {
836 qemu_log_mask(LOG_GUEST_ERROR,
837 "Write to unknown GREG register 0x%"HWADDR_PRIx"\n",
838 addr);
839 return;
840 }
841
842 trace_sungem_mmio_greg_write(addr, val);
843
844 /* Pre-write filter */
845 switch (addr) {
846 /* Read only registers */
847 case GREG_SEBSTATE:
848 case GREG_STAT:
849 case GREG_STAT2:
850 case GREG_PCIESTAT:
851 return; /* No actual write */
852 case GREG_IACK:
853 val &= GREG_STAT_LATCH;
854 s->gregs[GREG_STAT >> 2] &= ~val;
855 sungem_eval_irq(s);
856 return; /* No actual write */
857 case GREG_PCIEMASK:
858 val &= 0x7;
859 break;
860 }
861
862 s->gregs[addr >> 2] = val;
863
864 /* Post write action */
865 switch (addr) {
866 case GREG_IMASK:
867 /* Re-evaluate interrupt */
868 sungem_eval_irq(s);
869 break;
870 case GREG_SWRST:
871 switch (val & (GREG_SWRST_TXRST | GREG_SWRST_RXRST)) {
872 case GREG_SWRST_RXRST:
873 sungem_reset_rx(s);
874 break;
875 case GREG_SWRST_TXRST:
876 sungem_reset_tx(s);
877 break;
878 case GREG_SWRST_RXRST | GREG_SWRST_TXRST:
879 sungem_reset_all(s, false);
880 }
881 break;
882 }
883 }
884
885 static uint64_t sungem_mmio_greg_read(void *opaque, hwaddr addr, unsigned size)
886 {
887 SunGEMState *s = opaque;
888 uint32_t val;
889
890 if (!(addr < 0x20) && !(addr >= 0x1000 && addr <= 0x1010)) {
891 qemu_log_mask(LOG_GUEST_ERROR,
892 "Read from unknown GREG register 0x%"HWADDR_PRIx"\n",
893 addr);
894 return 0;
895 }
896
897 val = s->gregs[addr >> 2];
898
899 trace_sungem_mmio_greg_read(addr, val);
900
901 switch (addr) {
902 case GREG_STAT:
903 /* Side effect, clear bottom 7 bits */
904 s->gregs[GREG_STAT >> 2] &= ~GREG_STAT_LATCH;
905 sungem_eval_irq(s);
906
907 /* Inject TX completion in returned value */
908 val = (val & ~GREG_STAT_TXNR) |
909 (s->txdmaregs[TXDMA_TXDONE >> 2] << GREG_STAT_TXNR_SHIFT);
910 break;
911 case GREG_STAT2:
912 /* Return the status reg without side effect
913 * (and inject TX completion in returned value)
914 */
915 val = (s->gregs[GREG_STAT >> 2] & ~GREG_STAT_TXNR) |
916 (s->txdmaregs[TXDMA_TXDONE >> 2] << GREG_STAT_TXNR_SHIFT);
917 break;
918 }
919
920 return val;
921 }
922
923 static const MemoryRegionOps sungem_mmio_greg_ops = {
924 .read = sungem_mmio_greg_read,
925 .write = sungem_mmio_greg_write,
926 .endianness = DEVICE_LITTLE_ENDIAN,
927 .impl = {
928 .min_access_size = 4,
929 .max_access_size = 4,
930 },
931 };
932
933 static void sungem_mmio_txdma_write(void *opaque, hwaddr addr, uint64_t val,
934 unsigned size)
935 {
936 SunGEMState *s = opaque;
937
938 if (!(addr < 0x38) && !(addr >= 0x100 && addr <= 0x118)) {
939 qemu_log_mask(LOG_GUEST_ERROR,
940 "Write to unknown TXDMA register 0x%"HWADDR_PRIx"\n",
941 addr);
942 return;
943 }
944
945 trace_sungem_mmio_txdma_write(addr, val);
946
947 /* Pre-write filter */
948 switch (addr) {
949 /* Read only registers */
950 case TXDMA_TXDONE:
951 case TXDMA_PCNT:
952 case TXDMA_SMACHINE:
953 case TXDMA_DPLOW:
954 case TXDMA_DPHI:
955 case TXDMA_FSZ:
956 case TXDMA_FTAG:
957 return; /* No actual write */
958 }
959
960 s->txdmaregs[addr >> 2] = val;
961
962 /* Post write action */
963 switch (addr) {
964 case TXDMA_KICK:
965 sungem_tx_kick(s);
966 break;
967 case TXDMA_CFG:
968 sungem_update_masks(s);
969 break;
970 }
971 }
972
973 static uint64_t sungem_mmio_txdma_read(void *opaque, hwaddr addr, unsigned size)
974 {
975 SunGEMState *s = opaque;
976 uint32_t val;
977
978 if (!(addr < 0x38) && !(addr >= 0x100 && addr <= 0x118)) {
979 qemu_log_mask(LOG_GUEST_ERROR,
980 "Read from unknown TXDMA register 0x%"HWADDR_PRIx"\n",
981 addr);
982 return 0;
983 }
984
985 val = s->txdmaregs[addr >> 2];
986
987 trace_sungem_mmio_txdma_read(addr, val);
988
989 return val;
990 }
991
992 static const MemoryRegionOps sungem_mmio_txdma_ops = {
993 .read = sungem_mmio_txdma_read,
994 .write = sungem_mmio_txdma_write,
995 .endianness = DEVICE_LITTLE_ENDIAN,
996 .impl = {
997 .min_access_size = 4,
998 .max_access_size = 4,
999 },
1000 };
1001
1002 static void sungem_mmio_rxdma_write(void *opaque, hwaddr addr, uint64_t val,
1003 unsigned size)
1004 {
1005 SunGEMState *s = opaque;
1006
1007 if (!(addr <= 0x28) && !(addr >= 0x100 && addr <= 0x120)) {
1008 qemu_log_mask(LOG_GUEST_ERROR,
1009 "Write to unknown RXDMA register 0x%"HWADDR_PRIx"\n",
1010 addr);
1011 return;
1012 }
1013
1014 trace_sungem_mmio_rxdma_write(addr, val);
1015
1016 /* Pre-write filter */
1017 switch (addr) {
1018 /* Read only registers */
1019 case RXDMA_DONE:
1020 case RXDMA_PCNT:
1021 case RXDMA_SMACHINE:
1022 case RXDMA_DPLOW:
1023 case RXDMA_DPHI:
1024 case RXDMA_FSZ:
1025 case RXDMA_FTAG:
1026 return; /* No actual write */
1027 }
1028
1029 s->rxdmaregs[addr >> 2] = val;
1030
1031 /* Post write action */
1032 switch (addr) {
1033 case RXDMA_KICK:
1034 trace_sungem_rx_kick(val);
1035 break;
1036 case RXDMA_CFG:
1037 sungem_update_masks(s);
1038 if ((s->macregs[MAC_RXCFG >> 2] & MAC_RXCFG_ENAB) != 0 &&
1039 (s->rxdmaregs[RXDMA_CFG >> 2] & RXDMA_CFG_ENABLE) != 0) {
1040 qemu_flush_queued_packets(qemu_get_queue(s->nic));
1041 }
1042 break;
1043 }
1044 }
1045
1046 static uint64_t sungem_mmio_rxdma_read(void *opaque, hwaddr addr, unsigned size)
1047 {
1048 SunGEMState *s = opaque;
1049 uint32_t val;
1050
1051 if (!(addr <= 0x28) && !(addr >= 0x100 && addr <= 0x120)) {
1052 qemu_log_mask(LOG_GUEST_ERROR,
1053 "Read from unknown RXDMA register 0x%"HWADDR_PRIx"\n",
1054 addr);
1055 return 0;
1056 }
1057
1058 val = s->rxdmaregs[addr >> 2];
1059
1060 trace_sungem_mmio_rxdma_read(addr, val);
1061
1062 return val;
1063 }
1064
1065 static const MemoryRegionOps sungem_mmio_rxdma_ops = {
1066 .read = sungem_mmio_rxdma_read,
1067 .write = sungem_mmio_rxdma_write,
1068 .endianness = DEVICE_LITTLE_ENDIAN,
1069 .impl = {
1070 .min_access_size = 4,
1071 .max_access_size = 4,
1072 },
1073 };
1074
1075 static void sungem_mmio_mac_write(void *opaque, hwaddr addr, uint64_t val,
1076 unsigned size)
1077 {
1078 SunGEMState *s = opaque;
1079
1080 if (!(addr <= 0x134)) {
1081 qemu_log_mask(LOG_GUEST_ERROR,
1082 "Write to unknown MAC register 0x%"HWADDR_PRIx"\n",
1083 addr);
1084 return;
1085 }
1086
1087 trace_sungem_mmio_mac_write(addr, val);
1088
1089 /* Pre-write filter */
1090 switch (addr) {
1091 /* Read only registers */
1092 case MAC_TXRST: /* Not technically read-only but will do for now */
1093 case MAC_RXRST: /* Not technically read-only but will do for now */
1094 case MAC_TXSTAT:
1095 case MAC_RXSTAT:
1096 case MAC_CSTAT:
1097 case MAC_PATMPS:
1098 case MAC_SMACHINE:
1099 return; /* No actual write */
1100 case MAC_MINFSZ:
1101 /* 10-bits implemented */
1102 val &= 0x3ff;
1103 break;
1104 }
1105
1106 s->macregs[addr >> 2] = val;
1107
1108 /* Post write action */
1109 switch (addr) {
1110 case MAC_TXMASK:
1111 case MAC_RXMASK:
1112 case MAC_MCMASK:
1113 sungem_eval_cascade_irq(s);
1114 break;
1115 case MAC_RXCFG:
1116 sungem_update_masks(s);
1117 if ((s->macregs[MAC_RXCFG >> 2] & MAC_RXCFG_ENAB) != 0 &&
1118 (s->rxdmaregs[RXDMA_CFG >> 2] & RXDMA_CFG_ENABLE) != 0) {
1119 qemu_flush_queued_packets(qemu_get_queue(s->nic));
1120 }
1121 break;
1122 }
1123 }
1124
1125 static uint64_t sungem_mmio_mac_read(void *opaque, hwaddr addr, unsigned size)
1126 {
1127 SunGEMState *s = opaque;
1128 uint32_t val;
1129
1130 if (!(addr <= 0x134)) {
1131 qemu_log_mask(LOG_GUEST_ERROR,
1132 "Read from unknown MAC register 0x%"HWADDR_PRIx"\n",
1133 addr);
1134 return 0;
1135 }
1136
1137 val = s->macregs[addr >> 2];
1138
1139 trace_sungem_mmio_mac_read(addr, val);
1140
1141 switch (addr) {
1142 case MAC_TXSTAT:
1143 /* Side effect, clear all */
1144 s->macregs[addr >> 2] = 0;
1145 sungem_update_status(s, GREG_STAT_TXMAC, false);
1146 break;
1147 case MAC_RXSTAT:
1148 /* Side effect, clear all */
1149 s->macregs[addr >> 2] = 0;
1150 sungem_update_status(s, GREG_STAT_RXMAC, false);
1151 break;
1152 case MAC_CSTAT:
1153 /* Side effect, interrupt bits */
1154 s->macregs[addr >> 2] &= MAC_CSTAT_PTR;
1155 sungem_update_status(s, GREG_STAT_MAC, false);
1156 break;
1157 }
1158
1159 return val;
1160 }
1161
1162 static const MemoryRegionOps sungem_mmio_mac_ops = {
1163 .read = sungem_mmio_mac_read,
1164 .write = sungem_mmio_mac_write,
1165 .endianness = DEVICE_LITTLE_ENDIAN,
1166 .impl = {
1167 .min_access_size = 4,
1168 .max_access_size = 4,
1169 },
1170 };
1171
1172 static void sungem_mmio_mif_write(void *opaque, hwaddr addr, uint64_t val,
1173 unsigned size)
1174 {
1175 SunGEMState *s = opaque;
1176
1177 if (!(addr <= 0x1c)) {
1178 qemu_log_mask(LOG_GUEST_ERROR,
1179 "Write to unknown MIF register 0x%"HWADDR_PRIx"\n",
1180 addr);
1181 return;
1182 }
1183
1184 trace_sungem_mmio_mif_write(addr, val);
1185
1186 /* Pre-write filter */
1187 switch (addr) {
1188 /* Read only registers */
1189 case MIF_STATUS:
1190 case MIF_SMACHINE:
1191 return; /* No actual write */
1192 case MIF_CFG:
1193 /* Maintain the RO MDI bits to advertize an MDIO PHY on MDI0 */
1194 val &= ~MIF_CFG_MDI1;
1195 val |= MIF_CFG_MDI0;
1196 break;
1197 }
1198
1199 s->mifregs[addr >> 2] = val;
1200
1201 /* Post write action */
1202 switch (addr) {
1203 case MIF_FRAME:
1204 s->mifregs[addr >> 2] = sungem_mii_op(s, val);
1205 break;
1206 }
1207 }
1208
1209 static uint64_t sungem_mmio_mif_read(void *opaque, hwaddr addr, unsigned size)
1210 {
1211 SunGEMState *s = opaque;
1212 uint32_t val;
1213
1214 if (!(addr <= 0x1c)) {
1215 qemu_log_mask(LOG_GUEST_ERROR,
1216 "Read from unknown MIF register 0x%"HWADDR_PRIx"\n",
1217 addr);
1218 return 0;
1219 }
1220
1221 val = s->mifregs[addr >> 2];
1222
1223 trace_sungem_mmio_mif_read(addr, val);
1224
1225 return val;
1226 }
1227
1228 static const MemoryRegionOps sungem_mmio_mif_ops = {
1229 .read = sungem_mmio_mif_read,
1230 .write = sungem_mmio_mif_write,
1231 .endianness = DEVICE_LITTLE_ENDIAN,
1232 .impl = {
1233 .min_access_size = 4,
1234 .max_access_size = 4,
1235 },
1236 };
1237
1238 static void sungem_mmio_pcs_write(void *opaque, hwaddr addr, uint64_t val,
1239 unsigned size)
1240 {
1241 SunGEMState *s = opaque;
1242
1243 if (!(addr <= 0x18) && !(addr >= 0x50 && addr <= 0x5c)) {
1244 qemu_log_mask(LOG_GUEST_ERROR,
1245 "Write to unknown PCS register 0x%"HWADDR_PRIx"\n",
1246 addr);
1247 return;
1248 }
1249
1250 trace_sungem_mmio_pcs_write(addr, val);
1251
1252 /* Pre-write filter */
1253 switch (addr) {
1254 /* Read only registers */
1255 case PCS_MIISTAT:
1256 case PCS_ISTAT:
1257 case PCS_SSTATE:
1258 return; /* No actual write */
1259 }
1260
1261 s->pcsregs[addr >> 2] = val;
1262 }
1263
1264 static uint64_t sungem_mmio_pcs_read(void *opaque, hwaddr addr, unsigned size)
1265 {
1266 SunGEMState *s = opaque;
1267 uint32_t val;
1268
1269 if (!(addr <= 0x18) && !(addr >= 0x50 && addr <= 0x5c)) {
1270 qemu_log_mask(LOG_GUEST_ERROR,
1271 "Read from unknown PCS register 0x%"HWADDR_PRIx"\n",
1272 addr);
1273 return 0;
1274 }
1275
1276 val = s->pcsregs[addr >> 2];
1277
1278 trace_sungem_mmio_pcs_read(addr, val);
1279
1280 return val;
1281 }
1282
1283 static const MemoryRegionOps sungem_mmio_pcs_ops = {
1284 .read = sungem_mmio_pcs_read,
1285 .write = sungem_mmio_pcs_write,
1286 .endianness = DEVICE_LITTLE_ENDIAN,
1287 .impl = {
1288 .min_access_size = 4,
1289 .max_access_size = 4,
1290 },
1291 };
1292
1293 static void sungem_uninit(PCIDevice *dev)
1294 {
1295 SunGEMState *s = SUNGEM(dev);
1296
1297 qemu_del_nic(s->nic);
1298 }
1299
1300 static NetClientInfo net_sungem_info = {
1301 .type = NET_CLIENT_DRIVER_NIC,
1302 .size = sizeof(NICState),
1303 .can_receive = sungem_can_receive,
1304 .receive = sungem_receive,
1305 .link_status_changed = sungem_set_link_status,
1306 };
1307
1308 static void sungem_realize(PCIDevice *pci_dev, Error **errp)
1309 {
1310 DeviceState *dev = DEVICE(pci_dev);
1311 SunGEMState *s = SUNGEM(pci_dev);
1312 uint8_t *pci_conf;
1313
1314 pci_conf = pci_dev->config;
1315
1316 pci_set_word(pci_conf + PCI_STATUS,
1317 PCI_STATUS_FAST_BACK |
1318 PCI_STATUS_DEVSEL_MEDIUM |
1319 PCI_STATUS_66MHZ);
1320
1321 pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, 0x0);
1322 pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, 0x0);
1323
1324 pci_conf[PCI_INTERRUPT_PIN] = 1; /* interrupt pin A */
1325 pci_conf[PCI_MIN_GNT] = 0x40;
1326 pci_conf[PCI_MAX_LAT] = 0x40;
1327
1328 sungem_reset_all(s, true);
1329 memory_region_init(&s->sungem, OBJECT(s), "sungem", SUNGEM_MMIO_SIZE);
1330
1331 memory_region_init_io(&s->greg, OBJECT(s), &sungem_mmio_greg_ops, s,
1332 "sungem.greg", SUNGEM_MMIO_GREG_SIZE);
1333 memory_region_add_subregion(&s->sungem, 0, &s->greg);
1334
1335 memory_region_init_io(&s->txdma, OBJECT(s), &sungem_mmio_txdma_ops, s,
1336 "sungem.txdma", SUNGEM_MMIO_TXDMA_SIZE);
1337 memory_region_add_subregion(&s->sungem, 0x2000, &s->txdma);
1338
1339 memory_region_init_io(&s->rxdma, OBJECT(s), &sungem_mmio_rxdma_ops, s,
1340 "sungem.rxdma", SUNGEM_MMIO_RXDMA_SIZE);
1341 memory_region_add_subregion(&s->sungem, 0x4000, &s->rxdma);
1342
1343 memory_region_init_io(&s->mac, OBJECT(s), &sungem_mmio_mac_ops, s,
1344 "sungem.mac", SUNGEM_MMIO_MAC_SIZE);
1345 memory_region_add_subregion(&s->sungem, 0x6000, &s->mac);
1346
1347 memory_region_init_io(&s->mif, OBJECT(s), &sungem_mmio_mif_ops, s,
1348 "sungem.mif", SUNGEM_MMIO_MIF_SIZE);
1349 memory_region_add_subregion(&s->sungem, 0x6200, &s->mif);
1350
1351 memory_region_init_io(&s->pcs, OBJECT(s), &sungem_mmio_pcs_ops, s,
1352 "sungem.pcs", SUNGEM_MMIO_PCS_SIZE);
1353 memory_region_add_subregion(&s->sungem, 0x9000, &s->pcs);
1354
1355 pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->sungem);
1356
1357 qemu_macaddr_default_if_unset(&s->conf.macaddr);
1358 s->nic = qemu_new_nic(&net_sungem_info, &s->conf,
1359 object_get_typename(OBJECT(dev)),
1360 dev->id, s);
1361 qemu_format_nic_info_str(qemu_get_queue(s->nic),
1362 s->conf.macaddr.a);
1363 }
1364
1365 static void sungem_reset(DeviceState *dev)
1366 {
1367 SunGEMState *s = SUNGEM(dev);
1368
1369 sungem_reset_all(s, true);
1370 }
1371
1372 static void sungem_instance_init(Object *obj)
1373 {
1374 SunGEMState *s = SUNGEM(obj);
1375
1376 device_add_bootindex_property(obj, &s->conf.bootindex,
1377 "bootindex", "/ethernet-phy@0",
1378 DEVICE(obj), NULL);
1379 }
1380
1381 static Property sungem_properties[] = {
1382 DEFINE_NIC_PROPERTIES(SunGEMState, conf),
1383 /* Phy address should be 0 for most Apple machines except
1384 * for K2 in which case it's 1. Will be set by a machine
1385 * override.
1386 */
1387 DEFINE_PROP_UINT32("phy_addr", SunGEMState, phy_addr, 0),
1388 DEFINE_PROP_END_OF_LIST(),
1389 };
1390
1391 static const VMStateDescription vmstate_sungem = {
1392 .name = "sungem",
1393 .version_id = 0,
1394 .minimum_version_id = 0,
1395 .fields = (VMStateField[]) {
1396 VMSTATE_PCI_DEVICE(pdev, SunGEMState),
1397 VMSTATE_MACADDR(conf.macaddr, SunGEMState),
1398 VMSTATE_UINT32(phy_addr, SunGEMState),
1399 VMSTATE_UINT32_ARRAY(gregs, SunGEMState, (SUNGEM_MMIO_GREG_SIZE >> 2)),
1400 VMSTATE_UINT32_ARRAY(txdmaregs, SunGEMState,
1401 (SUNGEM_MMIO_TXDMA_SIZE >> 2)),
1402 VMSTATE_UINT32_ARRAY(rxdmaregs, SunGEMState,
1403 (SUNGEM_MMIO_RXDMA_SIZE >> 2)),
1404 VMSTATE_UINT32_ARRAY(macregs, SunGEMState, (SUNGEM_MMIO_MAC_SIZE >> 2)),
1405 VMSTATE_UINT32_ARRAY(mifregs, SunGEMState, (SUNGEM_MMIO_MIF_SIZE >> 2)),
1406 VMSTATE_UINT32_ARRAY(pcsregs, SunGEMState, (SUNGEM_MMIO_PCS_SIZE >> 2)),
1407 VMSTATE_UINT32(rx_mask, SunGEMState),
1408 VMSTATE_UINT32(tx_mask, SunGEMState),
1409 VMSTATE_UINT8_ARRAY(tx_data, SunGEMState, MAX_PACKET_SIZE),
1410 VMSTATE_UINT32(tx_size, SunGEMState),
1411 VMSTATE_UINT64(tx_first_ctl, SunGEMState),
1412 VMSTATE_END_OF_LIST()
1413 }
1414 };
1415
1416 static void sungem_class_init(ObjectClass *klass, void *data)
1417 {
1418 DeviceClass *dc = DEVICE_CLASS(klass);
1419 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
1420
1421 k->realize = sungem_realize;
1422 k->exit = sungem_uninit;
1423 k->vendor_id = PCI_VENDOR_ID_APPLE;
1424 k->device_id = PCI_DEVICE_ID_APPLE_UNI_N_GMAC;
1425 k->revision = 0x01;
1426 k->class_id = PCI_CLASS_NETWORK_ETHERNET;
1427 dc->vmsd = &vmstate_sungem;
1428 dc->reset = sungem_reset;
1429 dc->props = sungem_properties;
1430 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
1431 }
1432
1433 static const TypeInfo sungem_info = {
1434 .name = TYPE_SUNGEM,
1435 .parent = TYPE_PCI_DEVICE,
1436 .instance_size = sizeof(SunGEMState),
1437 .class_init = sungem_class_init,
1438 .instance_init = sungem_instance_init,
1439 .interfaces = (InterfaceInfo[]) {
1440 { INTERFACE_CONVENTIONAL_PCI_DEVICE },
1441 { }
1442 }
1443 };
1444
1445 static void sungem_register_types(void)
1446 {
1447 type_register_static(&sungem_info);
1448 }
1449
1450 type_init(sungem_register_types)
AR7 emulation for QEMU