1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22#include "qemu/osdep.h"
23#include "qemu/error-report.h"
24#include "qapi/error.h"
25#include "hw/hw.h"
26#include "qemu/log.h"
27#include "sysemu/sysemu.h"
28#include "hw/boards.h"
29#include "hw/loader.h"
30#include "elf.h"
31#include "hw/sysbus.h"
32#include "sysemu/kvm.h"
33#include "sysemu/device_tree.h"
34#include "kvm_ppc.h"
35
36#include "hw/ppc/spapr.h"
37#include "hw/ppc/spapr_vio.h"
38#include "hw/ppc/xics.h"
39#include "hw/ppc/fdt.h"
40#include "trace.h"
41
42#include <libfdt.h>
43
44static Property spapr_vio_props[] = {
45 DEFINE_PROP_UINT32("irq", VIOsPAPRDevice, irq, 0), \
46 DEFINE_PROP_END_OF_LIST(),
47};
48
49static char *spapr_vio_get_dev_name(DeviceState *qdev)
50{
51 VIOsPAPRDevice *dev = VIO_SPAPR_DEVICE(qdev);
52 VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
53
54
55 return g_strdup_printf("%s@%x", pc->dt_name, dev->reg);
56}
57
58static void spapr_vio_bus_class_init(ObjectClass *klass, void *data)
59{
60 BusClass *k = BUS_CLASS(klass);
61
62 k->get_dev_path = spapr_vio_get_dev_name;
63 k->get_fw_dev_path = spapr_vio_get_dev_name;
64}
65
66static const TypeInfo spapr_vio_bus_info = {
67 .name = TYPE_SPAPR_VIO_BUS,
68 .parent = TYPE_BUS,
69 .class_init = spapr_vio_bus_class_init,
70 .instance_size = sizeof(VIOsPAPRBus),
71};
72
73VIOsPAPRDevice *spapr_vio_find_by_reg(VIOsPAPRBus *bus, uint32_t reg)
74{
75 BusChild *kid;
76 VIOsPAPRDevice *dev = NULL;
77
78 QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
79 dev = (VIOsPAPRDevice *)kid->child;
80 if (dev->reg == reg) {
81 return dev;
82 }
83 }
84
85 return NULL;
86}
87
88static int vio_make_devnode(VIOsPAPRDevice *dev,
89 void *fdt)
90{
91 VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
92 int vdevice_off, node_off, ret;
93 char *dt_name;
94
95 vdevice_off = fdt_path_offset(fdt, "/vdevice");
96 if (vdevice_off < 0) {
97 return vdevice_off;
98 }
99
100 dt_name = spapr_vio_get_dev_name(DEVICE(dev));
101 node_off = fdt_add_subnode(fdt, vdevice_off, dt_name);
102 g_free(dt_name);
103 if (node_off < 0) {
104 return node_off;
105 }
106
107 ret = fdt_setprop_cell(fdt, node_off, "reg", dev->reg);
108 if (ret < 0) {
109 return ret;
110 }
111
112 if (pc->dt_type) {
113 ret = fdt_setprop_string(fdt, node_off, "device_type",
114 pc->dt_type);
115 if (ret < 0) {
116 return ret;
117 }
118 }
119
120 if (pc->dt_compatible) {
121 ret = fdt_setprop_string(fdt, node_off, "compatible",
122 pc->dt_compatible);
123 if (ret < 0) {
124 return ret;
125 }
126 }
127
128 if (dev->irq) {
129 uint32_t ints_prop[2];
130
131 spapr_dt_xics_irq(ints_prop, dev->irq, false);
132 ret = fdt_setprop(fdt, node_off, "interrupts", ints_prop,
133 sizeof(ints_prop));
134 if (ret < 0) {
135 return ret;
136 }
137 }
138
139 ret = spapr_tcet_dma_dt(fdt, node_off, "ibm,my-dma-window", dev->tcet);
140 if (ret < 0) {
141 return ret;
142 }
143
144 if (pc->devnode) {
145 ret = (pc->devnode)(dev, fdt, node_off);
146 if (ret < 0) {
147 return ret;
148 }
149 }
150
151 return node_off;
152}
153
154
155
156
157static target_ulong h_reg_crq(PowerPCCPU *cpu, sPAPRMachineState *spapr,
158 target_ulong opcode, target_ulong *args)
159{
160 target_ulong reg = args[0];
161 target_ulong queue_addr = args[1];
162 target_ulong queue_len = args[2];
163 VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
164
165 if (!dev) {
166 hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
167 return H_PARAMETER;
168 }
169
170
171 if (queue_len < 0x1000 || queue_len > 0x10000000) {
172 hcall_dprintf("Queue size too small or too big (0x" TARGET_FMT_lx
173 ")\n", queue_len);
174 return H_PARAMETER;
175 }
176
177
178 if (queue_addr & 0xfff) {
179 hcall_dprintf("Queue not aligned (0x" TARGET_FMT_lx ")\n", queue_addr);
180 return H_PARAMETER;
181 }
182
183
184 if (!dev->crq.SendFunc) {
185 hcall_dprintf("Device does not support CRQ\n");
186 return H_NOT_FOUND;
187 }
188
189
190 if (dev->crq.qsize) {
191 hcall_dprintf("CRQ already registered\n");
192 return H_RESOURCE;
193 }
194 dev->crq.qladdr = queue_addr;
195 dev->crq.qsize = queue_len;
196 dev->crq.qnext = 0;
197
198 trace_spapr_vio_h_reg_crq(reg, queue_addr, queue_len);
199 return H_SUCCESS;
200}
201
202static target_ulong free_crq(VIOsPAPRDevice *dev)
203{
204 dev->crq.qladdr = 0;
205 dev->crq.qsize = 0;
206 dev->crq.qnext = 0;
207
208 trace_spapr_vio_free_crq(dev->reg);
209
210 return H_SUCCESS;
211}
212
213static target_ulong h_free_crq(PowerPCCPU *cpu, sPAPRMachineState *spapr,
214 target_ulong opcode, target_ulong *args)
215{
216 target_ulong reg = args[0];
217 VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
218
219 if (!dev) {
220 hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
221 return H_PARAMETER;
222 }
223
224 return free_crq(dev);
225}
226
227static target_ulong h_send_crq(PowerPCCPU *cpu, sPAPRMachineState *spapr,
228 target_ulong opcode, target_ulong *args)
229{
230 target_ulong reg = args[0];
231 target_ulong msg_hi = args[1];
232 target_ulong msg_lo = args[2];
233 VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
234 uint64_t crq_mangle[2];
235
236 if (!dev) {
237 hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
238 return H_PARAMETER;
239 }
240 crq_mangle[0] = cpu_to_be64(msg_hi);
241 crq_mangle[1] = cpu_to_be64(msg_lo);
242
243 if (dev->crq.SendFunc) {
244 return dev->crq.SendFunc(dev, (uint8_t *)crq_mangle);
245 }
246
247 return H_HARDWARE;
248}
249
250static target_ulong h_enable_crq(PowerPCCPU *cpu, sPAPRMachineState *spapr,
251 target_ulong opcode, target_ulong *args)
252{
253 target_ulong reg = args[0];
254 VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
255
256 if (!dev) {
257 hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
258 return H_PARAMETER;
259 }
260
261 return 0;
262}
263
264
265int spapr_vio_send_crq(VIOsPAPRDevice *dev, uint8_t *crq)
266{
267 int rc;
268 uint8_t byte;
269
270 if (!dev->crq.qsize) {
271 error_report("spapr_vio_send_creq on uninitialized queue");
272 return -1;
273 }
274
275
276 rc = spapr_vio_dma_read(dev, dev->crq.qladdr + dev->crq.qnext, &byte, 1);
277 if (rc) {
278 return rc;
279 }
280 if (byte != 0) {
281 return 1;
282 }
283
284 rc = spapr_vio_dma_write(dev, dev->crq.qladdr + dev->crq.qnext + 8,
285 &crq[8], 8);
286 if (rc) {
287 return rc;
288 }
289
290 kvmppc_eieio();
291
292 rc = spapr_vio_dma_write(dev, dev->crq.qladdr + dev->crq.qnext, crq, 8);
293 if (rc) {
294 return rc;
295 }
296
297 dev->crq.qnext = (dev->crq.qnext + 16) % dev->crq.qsize;
298
299 if (dev->signal_state & 1) {
300 qemu_irq_pulse(spapr_vio_qirq(dev));
301 }
302
303 return 0;
304}
305
306
307
308static void spapr_vio_quiesce_one(VIOsPAPRDevice *dev)
309{
310 if (dev->tcet) {
311 device_reset(DEVICE(dev->tcet));
312 }
313 free_crq(dev);
314}
315
316void spapr_vio_set_bypass(VIOsPAPRDevice *dev, bool bypass)
317{
318 if (!dev->tcet) {
319 return;
320 }
321
322 memory_region_set_enabled(&dev->mrbypass, bypass);
323 memory_region_set_enabled(spapr_tce_get_iommu(dev->tcet), !bypass);
324
325 dev->tcet->bypass = bypass;
326}
327
328static void rtas_set_tce_bypass(PowerPCCPU *cpu, sPAPRMachineState *spapr,
329 uint32_t token,
330 uint32_t nargs, target_ulong args,
331 uint32_t nret, target_ulong rets)
332{
333 VIOsPAPRBus *bus = spapr->vio_bus;
334 VIOsPAPRDevice *dev;
335 uint32_t unit, enable;
336
337 if (nargs != 2) {
338 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
339 return;
340 }
341 unit = rtas_ld(args, 0);
342 enable = rtas_ld(args, 1);
343 dev = spapr_vio_find_by_reg(bus, unit);
344 if (!dev) {
345 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
346 return;
347 }
348
349 if (!dev->tcet) {
350 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
351 return;
352 }
353
354 spapr_vio_set_bypass(dev, !!enable);
355
356 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
357}
358
359static void rtas_quiesce(PowerPCCPU *cpu, sPAPRMachineState *spapr,
360 uint32_t token,
361 uint32_t nargs, target_ulong args,
362 uint32_t nret, target_ulong rets)
363{
364 VIOsPAPRBus *bus = spapr->vio_bus;
365 BusChild *kid;
366 VIOsPAPRDevice *dev = NULL;
367
368 if (nargs != 0) {
369 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
370 return;
371 }
372
373 QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
374 dev = (VIOsPAPRDevice *)kid->child;
375 spapr_vio_quiesce_one(dev);
376 }
377
378 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
379}
380
381static VIOsPAPRDevice *reg_conflict(VIOsPAPRDevice *dev)
382{
383 VIOsPAPRBus *bus = SPAPR_VIO_BUS(dev->qdev.parent_bus);
384 BusChild *kid;
385 VIOsPAPRDevice *other;
386
387
388
389
390
391
392 QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
393 other = VIO_SPAPR_DEVICE(kid->child);
394
395 if (other != dev && other->reg == dev->reg) {
396 return other;
397 }
398 }
399
400 return 0;
401}
402
403static void spapr_vio_busdev_reset(DeviceState *qdev)
404{
405 VIOsPAPRDevice *dev = VIO_SPAPR_DEVICE(qdev);
406 VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
407
408
409 spapr_vio_quiesce_one(dev);
410
411 dev->signal_state = 0;
412
413 spapr_vio_set_bypass(dev, false);
414 if (pc->reset) {
415 pc->reset(dev);
416 }
417}
418
419static void spapr_vio_busdev_realize(DeviceState *qdev, Error **errp)
420{
421 sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
422 VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev;
423 VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
424 char *id;
425 Error *local_err = NULL;
426
427 if (dev->reg != -1) {
428
429
430
431
432
433
434 VIOsPAPRDevice *other = reg_conflict(dev);
435
436 if (other) {
437 error_setg(errp, "%s and %s devices conflict at address %#x",
438 object_get_typename(OBJECT(qdev)),
439 object_get_typename(OBJECT(&other->qdev)),
440 dev->reg);
441 return;
442 }
443 } else {
444
445 VIOsPAPRBus *bus = SPAPR_VIO_BUS(dev->qdev.parent_bus);
446
447 do {
448 dev->reg = bus->next_reg++;
449 } while (reg_conflict(dev));
450 }
451
452
453 if (!dev->qdev.id) {
454 id = spapr_vio_get_dev_name(DEVICE(dev));
455 dev->qdev.id = id;
456 }
457
458 dev->irq = spapr_irq_alloc(spapr, dev->irq, false, &local_err);
459 if (local_err) {
460 error_propagate(errp, local_err);
461 return;
462 }
463
464 if (pc->rtce_window_size) {
465 uint32_t liobn = SPAPR_VIO_LIOBN(dev->reg);
466
467 memory_region_init(&dev->mrroot, OBJECT(dev), "iommu-spapr-root",
468 ram_size);
469 memory_region_init_alias(&dev->mrbypass, OBJECT(dev),
470 "iommu-spapr-bypass", get_system_memory(),
471 0, ram_size);
472 memory_region_add_subregion_overlap(&dev->mrroot, 0, &dev->mrbypass, 1);
473 address_space_init(&dev->as, &dev->mrroot, qdev->id);
474
475 dev->tcet = spapr_tce_new_table(qdev, liobn);
476 spapr_tce_table_enable(dev->tcet, SPAPR_TCE_PAGE_SHIFT, 0,
477 pc->rtce_window_size >> SPAPR_TCE_PAGE_SHIFT);
478 dev->tcet->vdev = dev;
479 memory_region_add_subregion_overlap(&dev->mrroot, 0,
480 spapr_tce_get_iommu(dev->tcet), 2);
481 }
482
483 pc->realize(dev, errp);
484}
485
486static target_ulong h_vio_signal(PowerPCCPU *cpu, sPAPRMachineState *spapr,
487 target_ulong opcode,
488 target_ulong *args)
489{
490 target_ulong reg = args[0];
491 target_ulong mode = args[1];
492 VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
493 VIOsPAPRDeviceClass *pc;
494
495 if (!dev) {
496 return H_PARAMETER;
497 }
498
499 pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
500
501 if (mode & ~pc->signal_mask) {
502 return H_PARAMETER;
503 }
504
505 dev->signal_state = mode;
506
507 return H_SUCCESS;
508}
509
510VIOsPAPRBus *spapr_vio_bus_init(void)
511{
512 VIOsPAPRBus *bus;
513 BusState *qbus;
514 DeviceState *dev;
515
516
517 dev = qdev_create(NULL, TYPE_SPAPR_VIO_BRIDGE);
518 qdev_init_nofail(dev);
519
520
521 qbus = qbus_create(TYPE_SPAPR_VIO_BUS, dev, "spapr-vio");
522 bus = SPAPR_VIO_BUS(qbus);
523 bus->next_reg = 0x71000000;
524
525
526 spapr_register_hypercall(H_VIO_SIGNAL, h_vio_signal);
527
528
529 spapr_register_hypercall(H_REG_CRQ, h_reg_crq);
530 spapr_register_hypercall(H_FREE_CRQ, h_free_crq);
531 spapr_register_hypercall(H_SEND_CRQ, h_send_crq);
532 spapr_register_hypercall(H_ENABLE_CRQ, h_enable_crq);
533
534
535 spapr_rtas_register(RTAS_IBM_SET_TCE_BYPASS, "ibm,set-tce-bypass",
536 rtas_set_tce_bypass);
537 spapr_rtas_register(RTAS_QUIESCE, "quiesce", rtas_quiesce);
538
539 return bus;
540}
541
542static void spapr_vio_bridge_class_init(ObjectClass *klass, void *data)
543{
544 DeviceClass *dc = DEVICE_CLASS(klass);
545
546 dc->fw_name = "vdevice";
547}
548
549static const TypeInfo spapr_vio_bridge_info = {
550 .name = TYPE_SPAPR_VIO_BRIDGE,
551 .parent = TYPE_SYS_BUS_DEVICE,
552 .class_init = spapr_vio_bridge_class_init,
553};
554
555const VMStateDescription vmstate_spapr_vio = {
556 .name = "spapr_vio",
557 .version_id = 1,
558 .minimum_version_id = 1,
559 .fields = (VMStateField[]) {
560
561 VMSTATE_UINT32_EQUAL(reg, VIOsPAPRDevice, NULL),
562 VMSTATE_UINT32_EQUAL(irq, VIOsPAPRDevice, NULL),
563
564
565 VMSTATE_UINT64(signal_state, VIOsPAPRDevice),
566 VMSTATE_UINT64(crq.qladdr, VIOsPAPRDevice),
567 VMSTATE_UINT32(crq.qsize, VIOsPAPRDevice),
568 VMSTATE_UINT32(crq.qnext, VIOsPAPRDevice),
569
570 VMSTATE_END_OF_LIST()
571 },
572};
573
574static void vio_spapr_device_class_init(ObjectClass *klass, void *data)
575{
576 DeviceClass *k = DEVICE_CLASS(klass);
577 k->realize = spapr_vio_busdev_realize;
578 k->reset = spapr_vio_busdev_reset;
579 k->bus_type = TYPE_SPAPR_VIO_BUS;
580 k->props = spapr_vio_props;
581}
582
583static const TypeInfo spapr_vio_type_info = {
584 .name = TYPE_VIO_SPAPR_DEVICE,
585 .parent = TYPE_DEVICE,
586 .instance_size = sizeof(VIOsPAPRDevice),
587 .abstract = true,
588 .class_size = sizeof(VIOsPAPRDeviceClass),
589 .class_init = vio_spapr_device_class_init,
590};
591
592static void spapr_vio_register_types(void)
593{
594 type_register_static(&spapr_vio_bus_info);
595 type_register_static(&spapr_vio_bridge_info);
596 type_register_static(&spapr_vio_type_info);
597}
598
599type_init(spapr_vio_register_types)
600
601static int compare_reg(const void *p1, const void *p2)
602{
603 VIOsPAPRDevice const *dev1, *dev2;
604
605 dev1 = (VIOsPAPRDevice *)*(DeviceState **)p1;
606 dev2 = (VIOsPAPRDevice *)*(DeviceState **)p2;
607
608 if (dev1->reg < dev2->reg) {
609 return -1;
610 }
611 if (dev1->reg == dev2->reg) {
612 return 0;
613 }
614
615
616 return 1;
617}
618
619void spapr_dt_vdevice(VIOsPAPRBus *bus, void *fdt)
620{
621 DeviceState *qdev, **qdevs;
622 BusChild *kid;
623 int i, num, ret = 0;
624 int node;
625
626 _FDT(node = fdt_add_subnode(fdt, 0, "vdevice"));
627
628 _FDT(fdt_setprop_string(fdt, node, "device_type", "vdevice"));
629 _FDT(fdt_setprop_string(fdt, node, "compatible", "IBM,vdevice"));
630 _FDT(fdt_setprop_cell(fdt, node, "#address-cells", 1));
631 _FDT(fdt_setprop_cell(fdt, node, "#size-cells", 0));
632 _FDT(fdt_setprop_cell(fdt, node, "#interrupt-cells", 2));
633 _FDT(fdt_setprop(fdt, node, "interrupt-controller", NULL, 0));
634
635
636 num = 0;
637 QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
638 num++;
639 }
640
641
642 qdevs = g_malloc(sizeof(qdev) * num);
643 num = 0;
644 QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
645 qdevs[num++] = kid->child;
646 }
647
648
649 qsort(qdevs, num, sizeof(qdev), compare_reg);
650
651
652
653 for (i = num - 1; i >= 0; i--) {
654 VIOsPAPRDevice *dev = (VIOsPAPRDevice *)(qdevs[i]);
655 VIOsPAPRDeviceClass *vdc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
656
657 ret = vio_make_devnode(dev, fdt);
658 if (ret < 0) {
659 error_report("Couldn't create device node /vdevice/%s@%"PRIx32,
660 vdc->dt_name, dev->reg);
661 exit(1);
662 }
663 }
664
665 g_free(qdevs);
666}
667
668gchar *spapr_vio_stdout_path(VIOsPAPRBus *bus)
669{
670 VIOsPAPRDevice *dev;
671 char *name, *path;
672
673 dev = spapr_vty_get_default(bus);
674 if (!dev) {
675 return NULL;
676 }
677
678 name = spapr_vio_get_dev_name(DEVICE(dev));
679 path = g_strdup_printf("/vdevice/%s", name);
680
681 g_free(name);
682 return path;
683}
684