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22#include "hw/hw.h"
23#include "sysemu/sysemu.h"
24#include "hw/boards.h"
25#include "monitor/monitor.h"
26#include "hw/loader.h"
27#include "elf.h"
28#include "hw/sysbus.h"
29#include "sysemu/kvm.h"
30#include "sysemu/device_tree.h"
31#include "kvm_ppc.h"
32
33#include "hw/ppc/spapr.h"
34#include "hw/ppc/spapr_vio.h"
35#include "hw/ppc/xics.h"
36
37#include <libfdt.h>
38
39
40
41#ifdef DEBUG_SPAPR
42#define DPRINTF(fmt, ...) \
43 do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
44#else
45#define DPRINTF(fmt, ...) \
46 do { } while (0)
47#endif
48
49static Property spapr_vio_props[] = {
50 DEFINE_PROP_UINT32("irq", VIOsPAPRDevice, irq, 0), \
51 DEFINE_PROP_END_OF_LIST(),
52};
53
54static char *spapr_vio_get_dev_name(DeviceState *qdev)
55{
56 VIOsPAPRDevice *dev = VIO_SPAPR_DEVICE(qdev);
57 VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
58 char *name;
59
60
61 name = g_strdup_printf("%s@%x", pc->dt_name, dev->reg);
62
63 return name;
64}
65
66static void spapr_vio_bus_class_init(ObjectClass *klass, void *data)
67{
68 BusClass *k = BUS_CLASS(klass);
69
70 k->get_dev_path = spapr_vio_get_dev_name;
71}
72
73static const TypeInfo spapr_vio_bus_info = {
74 .name = TYPE_SPAPR_VIO_BUS,
75 .parent = TYPE_BUS,
76 .class_init = spapr_vio_bus_class_init,
77 .instance_size = sizeof(VIOsPAPRBus),
78};
79
80VIOsPAPRDevice *spapr_vio_find_by_reg(VIOsPAPRBus *bus, uint32_t reg)
81{
82 BusChild *kid;
83 VIOsPAPRDevice *dev = NULL;
84
85 QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
86 dev = (VIOsPAPRDevice *)kid->child;
87 if (dev->reg == reg) {
88 return dev;
89 }
90 }
91
92 return NULL;
93}
94
95static int vio_make_devnode(VIOsPAPRDevice *dev,
96 void *fdt)
97{
98 VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
99 int vdevice_off, node_off, ret;
100 char *dt_name;
101
102 vdevice_off = fdt_path_offset(fdt, "/vdevice");
103 if (vdevice_off < 0) {
104 return vdevice_off;
105 }
106
107 dt_name = spapr_vio_get_dev_name(DEVICE(dev));
108 node_off = fdt_add_subnode(fdt, vdevice_off, dt_name);
109 g_free(dt_name);
110 if (node_off < 0) {
111 return node_off;
112 }
113
114 ret = fdt_setprop_cell(fdt, node_off, "reg", dev->reg);
115 if (ret < 0) {
116 return ret;
117 }
118
119 if (pc->dt_type) {
120 ret = fdt_setprop_string(fdt, node_off, "device_type",
121 pc->dt_type);
122 if (ret < 0) {
123 return ret;
124 }
125 }
126
127 if (pc->dt_compatible) {
128 ret = fdt_setprop_string(fdt, node_off, "compatible",
129 pc->dt_compatible);
130 if (ret < 0) {
131 return ret;
132 }
133 }
134
135 if (dev->irq) {
136 uint32_t ints_prop[] = {cpu_to_be32(dev->irq), 0};
137
138 ret = fdt_setprop(fdt, node_off, "interrupts", ints_prop,
139 sizeof(ints_prop));
140 if (ret < 0) {
141 return ret;
142 }
143 }
144
145 ret = spapr_tcet_dma_dt(fdt, node_off, "ibm,my-dma-window", dev->tcet);
146 if (ret < 0) {
147 return ret;
148 }
149
150 if (pc->devnode) {
151 ret = (pc->devnode)(dev, fdt, node_off);
152 if (ret < 0) {
153 return ret;
154 }
155 }
156
157 return node_off;
158}
159
160
161
162
163static target_ulong h_reg_crq(PowerPCCPU *cpu, sPAPREnvironment *spapr,
164 target_ulong opcode, target_ulong *args)
165{
166 target_ulong reg = args[0];
167 target_ulong queue_addr = args[1];
168 target_ulong queue_len = args[2];
169 VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
170
171 if (!dev) {
172 hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
173 return H_PARAMETER;
174 }
175
176
177 if (queue_len < 0x1000 || queue_len > 0x10000000) {
178 hcall_dprintf("Queue size too small or too big (0x" TARGET_FMT_lx
179 ")\n", queue_len);
180 return H_PARAMETER;
181 }
182
183
184 if (queue_addr & 0xfff) {
185 hcall_dprintf("Queue not aligned (0x" TARGET_FMT_lx ")\n", queue_addr);
186 return H_PARAMETER;
187 }
188
189
190 if (!dev->crq.SendFunc) {
191 hcall_dprintf("Device does not support CRQ\n");
192 return H_NOT_FOUND;
193 }
194
195
196 if (dev->crq.qsize) {
197 hcall_dprintf("CRQ already registered\n");
198 return H_RESOURCE;
199 }
200 dev->crq.qladdr = queue_addr;
201 dev->crq.qsize = queue_len;
202 dev->crq.qnext = 0;
203
204 DPRINTF("CRQ for dev 0x" TARGET_FMT_lx " registered at 0x"
205 TARGET_FMT_lx "/0x" TARGET_FMT_lx "\n",
206 reg, queue_addr, queue_len);
207 return H_SUCCESS;
208}
209
210static target_ulong free_crq(VIOsPAPRDevice *dev)
211{
212 dev->crq.qladdr = 0;
213 dev->crq.qsize = 0;
214 dev->crq.qnext = 0;
215
216 DPRINTF("CRQ for dev 0x%" PRIx32 " freed\n", dev->reg);
217
218 return H_SUCCESS;
219}
220
221static target_ulong h_free_crq(PowerPCCPU *cpu, sPAPREnvironment *spapr,
222 target_ulong opcode, target_ulong *args)
223{
224 target_ulong reg = args[0];
225 VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
226
227 if (!dev) {
228 hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
229 return H_PARAMETER;
230 }
231
232 return free_crq(dev);
233}
234
235static target_ulong h_send_crq(PowerPCCPU *cpu, sPAPREnvironment *spapr,
236 target_ulong opcode, target_ulong *args)
237{
238 target_ulong reg = args[0];
239 target_ulong msg_hi = args[1];
240 target_ulong msg_lo = args[2];
241 VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
242 uint64_t crq_mangle[2];
243
244 if (!dev) {
245 hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
246 return H_PARAMETER;
247 }
248 crq_mangle[0] = cpu_to_be64(msg_hi);
249 crq_mangle[1] = cpu_to_be64(msg_lo);
250
251 if (dev->crq.SendFunc) {
252 return dev->crq.SendFunc(dev, (uint8_t *)crq_mangle);
253 }
254
255 return H_HARDWARE;
256}
257
258static target_ulong h_enable_crq(PowerPCCPU *cpu, sPAPREnvironment *spapr,
259 target_ulong opcode, target_ulong *args)
260{
261 target_ulong reg = args[0];
262 VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
263
264 if (!dev) {
265 hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
266 return H_PARAMETER;
267 }
268
269 return 0;
270}
271
272
273int spapr_vio_send_crq(VIOsPAPRDevice *dev, uint8_t *crq)
274{
275 int rc;
276 uint8_t byte;
277
278 if (!dev->crq.qsize) {
279 fprintf(stderr, "spapr_vio_send_creq on uninitialized queue\n");
280 return -1;
281 }
282
283
284 rc = spapr_vio_dma_read(dev, dev->crq.qladdr + dev->crq.qnext, &byte, 1);
285 if (rc) {
286 return rc;
287 }
288 if (byte != 0) {
289 return 1;
290 }
291
292 rc = spapr_vio_dma_write(dev, dev->crq.qladdr + dev->crq.qnext + 8,
293 &crq[8], 8);
294 if (rc) {
295 return rc;
296 }
297
298 kvmppc_eieio();
299
300 rc = spapr_vio_dma_write(dev, dev->crq.qladdr + dev->crq.qnext, crq, 8);
301 if (rc) {
302 return rc;
303 }
304
305 dev->crq.qnext = (dev->crq.qnext + 16) % dev->crq.qsize;
306
307 if (dev->signal_state & 1) {
308 qemu_irq_pulse(spapr_vio_qirq(dev));
309 }
310
311 return 0;
312}
313
314
315
316static void spapr_vio_quiesce_one(VIOsPAPRDevice *dev)
317{
318 if (dev->tcet) {
319 device_reset(DEVICE(dev->tcet));
320 }
321 free_crq(dev);
322}
323
324static void rtas_set_tce_bypass(PowerPCCPU *cpu, sPAPREnvironment *spapr,
325 uint32_t token,
326 uint32_t nargs, target_ulong args,
327 uint32_t nret, target_ulong rets)
328{
329 VIOsPAPRBus *bus = spapr->vio_bus;
330 VIOsPAPRDevice *dev;
331 uint32_t unit, enable;
332
333 if (nargs != 2) {
334 rtas_st(rets, 0, -3);
335 return;
336 }
337 unit = rtas_ld(args, 0);
338 enable = rtas_ld(args, 1);
339 dev = spapr_vio_find_by_reg(bus, unit);
340 if (!dev) {
341 rtas_st(rets, 0, -3);
342 return;
343 }
344
345 if (!dev->tcet) {
346 rtas_st(rets, 0, -3);
347 return;
348 }
349
350 spapr_tce_set_bypass(dev->tcet, !!enable);
351
352 rtas_st(rets, 0, 0);
353}
354
355static void rtas_quiesce(PowerPCCPU *cpu, sPAPREnvironment *spapr,
356 uint32_t token,
357 uint32_t nargs, target_ulong args,
358 uint32_t nret, target_ulong rets)
359{
360 VIOsPAPRBus *bus = spapr->vio_bus;
361 BusChild *kid;
362 VIOsPAPRDevice *dev = NULL;
363
364 if (nargs != 0) {
365 rtas_st(rets, 0, -3);
366 return;
367 }
368
369 QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
370 dev = (VIOsPAPRDevice *)kid->child;
371 spapr_vio_quiesce_one(dev);
372 }
373
374 rtas_st(rets, 0, 0);
375}
376
377static VIOsPAPRDevice *reg_conflict(VIOsPAPRDevice *dev)
378{
379 VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus);
380 BusChild *kid;
381 VIOsPAPRDevice *other;
382
383
384
385
386
387
388 QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
389 other = VIO_SPAPR_DEVICE(kid->child);
390
391 if (other != dev && other->reg == dev->reg) {
392 return other;
393 }
394 }
395
396 return 0;
397}
398
399static void spapr_vio_busdev_reset(DeviceState *qdev)
400{
401 VIOsPAPRDevice *dev = VIO_SPAPR_DEVICE(qdev);
402 VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
403
404
405 spapr_vio_quiesce_one(dev);
406
407 dev->signal_state = 0;
408
409 if (pc->reset) {
410 pc->reset(dev);
411 }
412}
413
414static int spapr_vio_busdev_init(DeviceState *qdev)
415{
416 VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev;
417 VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
418 char *id;
419
420 if (dev->reg != -1) {
421
422
423
424
425
426
427 VIOsPAPRDevice *other = reg_conflict(dev);
428
429 if (other) {
430 fprintf(stderr, "vio: %s and %s devices conflict at address %#x\n",
431 object_get_typename(OBJECT(qdev)),
432 object_get_typename(OBJECT(&other->qdev)),
433 dev->reg);
434 return -1;
435 }
436 } else {
437
438 VIOsPAPRBus *bus = DO_UPCAST(VIOsPAPRBus, bus, dev->qdev.parent_bus);
439
440 do {
441 dev->reg = bus->next_reg++;
442 } while (reg_conflict(dev));
443 }
444
445
446 if (!dev->qdev.id) {
447 id = spapr_vio_get_dev_name(DEVICE(dev));
448 dev->qdev.id = id;
449 }
450
451 dev->irq = spapr_allocate_msi(dev->irq);
452 if (!dev->irq) {
453 return -1;
454 }
455
456 if (pc->rtce_window_size) {
457 uint32_t liobn = SPAPR_VIO_BASE_LIOBN | dev->reg;
458 dev->tcet = spapr_tce_new_table(qdev, liobn, pc->rtce_window_size);
459 address_space_init(&dev->as, spapr_tce_get_iommu(dev->tcet), qdev->id);
460 }
461
462 return pc->init(dev);
463}
464
465static target_ulong h_vio_signal(PowerPCCPU *cpu, sPAPREnvironment *spapr,
466 target_ulong opcode,
467 target_ulong *args)
468{
469 target_ulong reg = args[0];
470 target_ulong mode = args[1];
471 VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
472 VIOsPAPRDeviceClass *pc;
473
474 if (!dev) {
475 return H_PARAMETER;
476 }
477
478 pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
479
480 if (mode & ~pc->signal_mask) {
481 return H_PARAMETER;
482 }
483
484 dev->signal_state = mode;
485
486 return H_SUCCESS;
487}
488
489VIOsPAPRBus *spapr_vio_bus_init(void)
490{
491 VIOsPAPRBus *bus;
492 BusState *qbus;
493 DeviceState *dev;
494
495
496 dev = qdev_create(NULL, "spapr-vio-bridge");
497 qdev_init_nofail(dev);
498
499
500
501 qbus = qbus_create(TYPE_SPAPR_VIO_BUS, dev, "spapr-vio");
502 bus = DO_UPCAST(VIOsPAPRBus, bus, qbus);
503 bus->next_reg = 0x71000000;
504
505
506 spapr_register_hypercall(H_VIO_SIGNAL, h_vio_signal);
507
508
509 spapr_register_hypercall(H_REG_CRQ, h_reg_crq);
510 spapr_register_hypercall(H_FREE_CRQ, h_free_crq);
511 spapr_register_hypercall(H_SEND_CRQ, h_send_crq);
512 spapr_register_hypercall(H_ENABLE_CRQ, h_enable_crq);
513
514
515 spapr_rtas_register("ibm,set-tce-bypass", rtas_set_tce_bypass);
516 spapr_rtas_register("quiesce", rtas_quiesce);
517
518 return bus;
519}
520
521
522
523static int spapr_vio_bridge_init(SysBusDevice *dev)
524{
525
526 return 0;
527}
528
529static void spapr_vio_bridge_class_init(ObjectClass *klass, void *data)
530{
531 DeviceClass *dc = DEVICE_CLASS(klass);
532 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
533
534 k->init = spapr_vio_bridge_init;
535 dc->no_user = 1;
536}
537
538static const TypeInfo spapr_vio_bridge_info = {
539 .name = "spapr-vio-bridge",
540 .parent = TYPE_SYS_BUS_DEVICE,
541 .instance_size = sizeof(SysBusDevice),
542 .class_init = spapr_vio_bridge_class_init,
543};
544
545const VMStateDescription vmstate_spapr_vio = {
546 .name = "spapr_vio",
547 .version_id = 1,
548 .minimum_version_id = 1,
549 .minimum_version_id_old = 1,
550 .fields = (VMStateField []) {
551
552 VMSTATE_UINT32_EQUAL(reg, VIOsPAPRDevice),
553 VMSTATE_UINT32_EQUAL(irq, VIOsPAPRDevice),
554
555
556 VMSTATE_UINTTL(signal_state, VIOsPAPRDevice),
557 VMSTATE_UINT64(crq.qladdr, VIOsPAPRDevice),
558 VMSTATE_UINT32(crq.qsize, VIOsPAPRDevice),
559 VMSTATE_UINT32(crq.qnext, VIOsPAPRDevice),
560
561 VMSTATE_END_OF_LIST()
562 },
563};
564
565static void vio_spapr_device_class_init(ObjectClass *klass, void *data)
566{
567 DeviceClass *k = DEVICE_CLASS(klass);
568 k->init = spapr_vio_busdev_init;
569 k->reset = spapr_vio_busdev_reset;
570 k->bus_type = TYPE_SPAPR_VIO_BUS;
571 k->props = spapr_vio_props;
572}
573
574static const TypeInfo spapr_vio_type_info = {
575 .name = TYPE_VIO_SPAPR_DEVICE,
576 .parent = TYPE_DEVICE,
577 .instance_size = sizeof(VIOsPAPRDevice),
578 .abstract = true,
579 .class_size = sizeof(VIOsPAPRDeviceClass),
580 .class_init = vio_spapr_device_class_init,
581};
582
583static void spapr_vio_register_types(void)
584{
585 type_register_static(&spapr_vio_bus_info);
586 type_register_static(&spapr_vio_bridge_info);
587 type_register_static(&spapr_vio_type_info);
588}
589
590type_init(spapr_vio_register_types)
591
592static int compare_reg(const void *p1, const void *p2)
593{
594 VIOsPAPRDevice const *dev1, *dev2;
595
596 dev1 = (VIOsPAPRDevice *)*(DeviceState **)p1;
597 dev2 = (VIOsPAPRDevice *)*(DeviceState **)p2;
598
599 if (dev1->reg < dev2->reg) {
600 return -1;
601 }
602 if (dev1->reg == dev2->reg) {
603 return 0;
604 }
605
606
607 return 1;
608}
609
610int spapr_populate_vdevice(VIOsPAPRBus *bus, void *fdt)
611{
612 DeviceState *qdev, **qdevs;
613 BusChild *kid;
614 int i, num, ret = 0;
615
616
617 num = 0;
618 QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
619 num++;
620 }
621
622
623 qdevs = g_malloc(sizeof(qdev) * num);
624 num = 0;
625 QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
626 qdevs[num++] = kid->child;
627 }
628
629
630 qsort(qdevs, num, sizeof(qdev), compare_reg);
631
632
633
634 for (i = num - 1; i >= 0; i--) {
635 VIOsPAPRDevice *dev = (VIOsPAPRDevice *)(qdevs[i]);
636
637 ret = vio_make_devnode(dev, fdt);
638
639 if (ret < 0) {
640 goto out;
641 }
642 }
643
644 ret = 0;
645out:
646 free(qdevs);
647
648 return ret;
649}
650
651int spapr_populate_chosen_stdout(void *fdt, VIOsPAPRBus *bus)
652{
653 VIOsPAPRDevice *dev;
654 char *name, *path;
655 int ret, offset;
656
657 dev = spapr_vty_get_default(bus);
658 if (!dev)
659 return 0;
660
661 offset = fdt_path_offset(fdt, "/chosen");
662 if (offset < 0) {
663 return offset;
664 }
665
666 name = spapr_vio_get_dev_name(DEVICE(dev));
667 path = g_strdup_printf("/vdevice/%s", name);
668
669 ret = fdt_setprop_string(fdt, offset, "linux,stdout-path", path);
670
671 g_free(name);
672 g_free(path);
673
674 return ret;
675}
676
