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21#include "qemu/osdep.h"
22#include "qapi/error.h"
23#include "hw/pci/pci_bridge.h"
24#include "hw/pci/pcie.h"
25#include "hw/pci/msix.h"
26#include "hw/pci/msi.h"
27#include "hw/pci/pci_bus.h"
28#include "hw/pci/pcie_regs.h"
29#include "hw/pci/pcie_port.h"
30#include "qemu/range.h"
31
32
33#ifdef DEBUG_PCIE
34# define PCIE_DPRINTF(fmt, ...) \
35 fprintf(stderr, "%s:%d " fmt, __func__, __LINE__, ## __VA_ARGS__)
36#else
37# define PCIE_DPRINTF(fmt, ...) do {} while (0)
38#endif
39#define PCIE_DEV_PRINTF(dev, fmt, ...) \
40 PCIE_DPRINTF("%s:%x "fmt, (dev)->name, (dev)->devfn, ## __VA_ARGS__)
41
42
43
44
45
46
47static void
48pcie_cap_v1_fill(PCIDevice *dev, uint8_t port, uint8_t type, uint8_t version)
49{
50 uint8_t *exp_cap = dev->config + dev->exp.exp_cap;
51 uint8_t *cmask = dev->cmask + dev->exp.exp_cap;
52
53
54
55 pci_set_word(exp_cap + PCI_EXP_FLAGS,
56 ((type << PCI_EXP_FLAGS_TYPE_SHIFT) & PCI_EXP_FLAGS_TYPE) |
57 version);
58
59
60
61
62
63
64
65
66 pci_set_long(exp_cap + PCI_EXP_DEVCAP, PCI_EXP_DEVCAP_RBER);
67
68 pci_set_long(exp_cap + PCI_EXP_LNKCAP,
69 (port << PCI_EXP_LNKCAP_PN_SHIFT) |
70 PCI_EXP_LNKCAP_ASPMS_0S |
71 QEMU_PCI_EXP_LNKCAP_MLW(QEMU_PCI_EXP_LNK_X1) |
72 QEMU_PCI_EXP_LNKCAP_MLS(QEMU_PCI_EXP_LNK_2_5GT));
73
74 pci_set_word(exp_cap + PCI_EXP_LNKSTA,
75 QEMU_PCI_EXP_LNKSTA_NLW(QEMU_PCI_EXP_LNK_X1) |
76 QEMU_PCI_EXP_LNKSTA_CLS(QEMU_PCI_EXP_LNK_2_5GT));
77
78 if (dev->cap_present & QEMU_PCIE_LNKSTA_DLLLA) {
79 pci_word_test_and_set_mask(exp_cap + PCI_EXP_LNKSTA,
80 PCI_EXP_LNKSTA_DLLLA);
81 }
82
83
84
85
86
87 pci_set_word(cmask + PCI_EXP_LNKSTA, 0);
88}
89
90static void pcie_cap_fill_slot_lnk(PCIDevice *dev)
91{
92 PCIESlot *s = (PCIESlot *)object_dynamic_cast(OBJECT(dev), TYPE_PCIE_SLOT);
93 uint8_t *exp_cap = dev->config + dev->exp.exp_cap;
94
95
96 if (!s) {
97 return;
98 }
99
100
101 pci_long_test_and_clear_mask(exp_cap + PCI_EXP_LNKCAP,
102 PCI_EXP_LNKCAP_MLW | PCI_EXP_LNKCAP_SLS);
103 pci_long_test_and_set_mask(exp_cap + PCI_EXP_LNKCAP,
104 QEMU_PCI_EXP_LNKCAP_MLW(s->width) |
105 QEMU_PCI_EXP_LNKCAP_MLS(s->speed));
106
107
108
109
110
111
112 if (s->width > QEMU_PCI_EXP_LNK_X1 ||
113 s->speed > QEMU_PCI_EXP_LNK_2_5GT) {
114 pci_long_test_and_set_mask(exp_cap + PCI_EXP_LNKCAP,
115 PCI_EXP_LNKCAP_LBNC);
116 }
117
118 if (s->speed > QEMU_PCI_EXP_LNK_2_5GT) {
119
120
121
122
123
124
125
126 pci_long_test_and_set_mask(exp_cap + PCI_EXP_LNKCAP,
127 PCI_EXP_LNKCAP_DLLLARC);
128 pci_word_test_and_set_mask(exp_cap + PCI_EXP_LNKSTA,
129 PCI_EXP_LNKSTA_DLLLA);
130
131
132
133
134
135 pci_word_test_and_clear_mask(exp_cap + PCI_EXP_LNKCTL2,
136 PCI_EXP_LNKCTL2_TLS);
137 pci_word_test_and_set_mask(exp_cap + PCI_EXP_LNKCTL2,
138 QEMU_PCI_EXP_LNKCAP_MLS(s->speed) &
139 PCI_EXP_LNKCTL2_TLS);
140 }
141
142
143
144
145
146
147 if (s->speed > QEMU_PCI_EXP_LNK_5GT) {
148 pci_long_test_and_clear_mask(exp_cap + PCI_EXP_LNKCAP2, ~0U);
149 pci_long_test_and_set_mask(exp_cap + PCI_EXP_LNKCAP2,
150 PCI_EXP_LNKCAP2_SLS_2_5GB |
151 PCI_EXP_LNKCAP2_SLS_5_0GB |
152 PCI_EXP_LNKCAP2_SLS_8_0GB);
153 if (s->speed > QEMU_PCI_EXP_LNK_8GT) {
154 pci_long_test_and_set_mask(exp_cap + PCI_EXP_LNKCAP2,
155 PCI_EXP_LNKCAP2_SLS_16_0GB);
156 }
157 }
158}
159
160int pcie_cap_init(PCIDevice *dev, uint8_t offset,
161 uint8_t type, uint8_t port,
162 Error **errp)
163{
164
165 int pos;
166 uint8_t *exp_cap;
167
168 assert(pci_is_express(dev));
169
170 pos = pci_add_capability(dev, PCI_CAP_ID_EXP, offset,
171 PCI_EXP_VER2_SIZEOF, errp);
172 if (pos < 0) {
173 return pos;
174 }
175 dev->exp.exp_cap = pos;
176 exp_cap = dev->config + pos;
177
178
179 pcie_cap_v1_fill(dev, port, type, PCI_EXP_FLAGS_VER2);
180
181
182 pcie_cap_fill_slot_lnk(dev);
183
184
185 pci_set_long(exp_cap + PCI_EXP_DEVCAP2,
186 PCI_EXP_DEVCAP2_EFF | PCI_EXP_DEVCAP2_EETLPP);
187
188 pci_set_word(dev->wmask + pos + PCI_EXP_DEVCTL2, PCI_EXP_DEVCTL2_EETLPPB);
189
190 if (dev->cap_present & QEMU_PCIE_EXTCAP_INIT) {
191
192 pci_set_long(dev->wmask + PCI_CONFIG_SPACE_SIZE, 0);
193 }
194
195 return pos;
196}
197
198int pcie_cap_v1_init(PCIDevice *dev, uint8_t offset, uint8_t type,
199 uint8_t port)
200{
201
202 int pos;
203 Error *local_err = NULL;
204
205 assert(pci_is_express(dev));
206
207 pos = pci_add_capability(dev, PCI_CAP_ID_EXP, offset,
208 PCI_EXP_VER1_SIZEOF, &local_err);
209 if (pos < 0) {
210 error_report_err(local_err);
211 return pos;
212 }
213 dev->exp.exp_cap = pos;
214
215 pcie_cap_v1_fill(dev, port, type, PCI_EXP_FLAGS_VER1);
216
217 return pos;
218}
219
220static int
221pcie_endpoint_cap_common_init(PCIDevice *dev, uint8_t offset, uint8_t cap_size)
222{
223 uint8_t type = PCI_EXP_TYPE_ENDPOINT;
224 Error *local_err = NULL;
225 int ret;
226
227
228
229
230
231
232 if (pci_bus_is_express(pci_get_bus(dev))
233 && pci_bus_is_root(pci_get_bus(dev))) {
234 type = PCI_EXP_TYPE_RC_END;
235 }
236
237 if (cap_size == PCI_EXP_VER1_SIZEOF) {
238 return pcie_cap_v1_init(dev, offset, type, 0);
239 } else {
240 ret = pcie_cap_init(dev, offset, type, 0, &local_err);
241
242 if (ret < 0) {
243 error_report_err(local_err);
244 }
245
246 return ret;
247 }
248}
249
250int pcie_endpoint_cap_init(PCIDevice *dev, uint8_t offset)
251{
252 return pcie_endpoint_cap_common_init(dev, offset, PCI_EXP_VER2_SIZEOF);
253}
254
255int pcie_endpoint_cap_v1_init(PCIDevice *dev, uint8_t offset)
256{
257 return pcie_endpoint_cap_common_init(dev, offset, PCI_EXP_VER1_SIZEOF);
258}
259
260void pcie_cap_exit(PCIDevice *dev)
261{
262 pci_del_capability(dev, PCI_CAP_ID_EXP, PCI_EXP_VER2_SIZEOF);
263}
264
265void pcie_cap_v1_exit(PCIDevice *dev)
266{
267 pci_del_capability(dev, PCI_CAP_ID_EXP, PCI_EXP_VER1_SIZEOF);
268}
269
270uint8_t pcie_cap_get_type(const PCIDevice *dev)
271{
272 uint32_t pos = dev->exp.exp_cap;
273 assert(pos > 0);
274 return (pci_get_word(dev->config + pos + PCI_EXP_FLAGS) &
275 PCI_EXP_FLAGS_TYPE) >> PCI_EXP_FLAGS_TYPE_SHIFT;
276}
277
278
279
280
281void pcie_cap_flags_set_vector(PCIDevice *dev, uint8_t vector)
282{
283 uint8_t *exp_cap = dev->config + dev->exp.exp_cap;
284 assert(vector < 32);
285 pci_word_test_and_clear_mask(exp_cap + PCI_EXP_FLAGS, PCI_EXP_FLAGS_IRQ);
286 pci_word_test_and_set_mask(exp_cap + PCI_EXP_FLAGS,
287 vector << PCI_EXP_FLAGS_IRQ_SHIFT);
288}
289
290uint8_t pcie_cap_flags_get_vector(PCIDevice *dev)
291{
292 return (pci_get_word(dev->config + dev->exp.exp_cap + PCI_EXP_FLAGS) &
293 PCI_EXP_FLAGS_IRQ) >> PCI_EXP_FLAGS_IRQ_SHIFT;
294}
295
296void pcie_cap_deverr_init(PCIDevice *dev)
297{
298 uint32_t pos = dev->exp.exp_cap;
299 pci_long_test_and_set_mask(dev->config + pos + PCI_EXP_DEVCAP,
300 PCI_EXP_DEVCAP_RBER);
301 pci_long_test_and_set_mask(dev->wmask + pos + PCI_EXP_DEVCTL,
302 PCI_EXP_DEVCTL_CERE | PCI_EXP_DEVCTL_NFERE |
303 PCI_EXP_DEVCTL_FERE | PCI_EXP_DEVCTL_URRE);
304 pci_long_test_and_set_mask(dev->w1cmask + pos + PCI_EXP_DEVSTA,
305 PCI_EXP_DEVSTA_CED | PCI_EXP_DEVSTA_NFED |
306 PCI_EXP_DEVSTA_FED | PCI_EXP_DEVSTA_URD);
307}
308
309void pcie_cap_deverr_reset(PCIDevice *dev)
310{
311 uint8_t *devctl = dev->config + dev->exp.exp_cap + PCI_EXP_DEVCTL;
312 pci_long_test_and_clear_mask(devctl,
313 PCI_EXP_DEVCTL_CERE | PCI_EXP_DEVCTL_NFERE |
314 PCI_EXP_DEVCTL_FERE | PCI_EXP_DEVCTL_URRE);
315}
316
317void pcie_cap_lnkctl_init(PCIDevice *dev)
318{
319 uint32_t pos = dev->exp.exp_cap;
320 pci_long_test_and_set_mask(dev->wmask + pos + PCI_EXP_LNKCTL,
321 PCI_EXP_LNKCTL_CCC | PCI_EXP_LNKCTL_ES);
322}
323
324void pcie_cap_lnkctl_reset(PCIDevice *dev)
325{
326 uint8_t *lnkctl = dev->config + dev->exp.exp_cap + PCI_EXP_LNKCTL;
327 pci_long_test_and_clear_mask(lnkctl,
328 PCI_EXP_LNKCTL_CCC | PCI_EXP_LNKCTL_ES);
329}
330
331static void hotplug_event_update_event_status(PCIDevice *dev)
332{
333 uint32_t pos = dev->exp.exp_cap;
334 uint8_t *exp_cap = dev->config + pos;
335 uint16_t sltctl = pci_get_word(exp_cap + PCI_EXP_SLTCTL);
336 uint16_t sltsta = pci_get_word(exp_cap + PCI_EXP_SLTSTA);
337
338 dev->exp.hpev_notified = (sltctl & PCI_EXP_SLTCTL_HPIE) &&
339 (sltsta & sltctl & PCI_EXP_HP_EV_SUPPORTED);
340}
341
342static void hotplug_event_notify(PCIDevice *dev)
343{
344 bool prev = dev->exp.hpev_notified;
345
346 hotplug_event_update_event_status(dev);
347
348 if (prev == dev->exp.hpev_notified) {
349 return;
350 }
351
352
353
354
355
356
357
358 if (msix_enabled(dev)) {
359 msix_notify(dev, pcie_cap_flags_get_vector(dev));
360 } else if (msi_enabled(dev)) {
361 msi_notify(dev, pcie_cap_flags_get_vector(dev));
362 } else {
363 pci_set_irq(dev, dev->exp.hpev_notified);
364 }
365}
366
367static void hotplug_event_clear(PCIDevice *dev)
368{
369 hotplug_event_update_event_status(dev);
370 if (!msix_enabled(dev) && !msi_enabled(dev) && !dev->exp.hpev_notified) {
371 pci_irq_deassert(dev);
372 }
373}
374
375
376
377
378
379
380
381
382static void pcie_cap_slot_event(PCIDevice *dev, PCIExpressHotPlugEvent event)
383{
384
385 if (pci_word_test_and_set_mask(dev->config + dev->exp.exp_cap +
386 PCI_EXP_SLTSTA, event) == event) {
387 return;
388 }
389 hotplug_event_notify(dev);
390}
391
392static void pcie_cap_slot_plug_common(PCIDevice *hotplug_dev, DeviceState *dev,
393 Error **errp)
394{
395 uint8_t *exp_cap = hotplug_dev->config + hotplug_dev->exp.exp_cap;
396 uint16_t sltsta = pci_get_word(exp_cap + PCI_EXP_SLTSTA);
397
398 PCIE_DEV_PRINTF(PCI_DEVICE(dev), "hotplug state: 0x%x\n", sltsta);
399 if (sltsta & PCI_EXP_SLTSTA_EIS) {
400
401
402
403 error_setg_errno(errp, EBUSY, "slot is electromechanically locked");
404 }
405}
406
407void pcie_cap_slot_pre_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,
408 Error **errp)
409{
410 pcie_cap_slot_plug_common(PCI_DEVICE(hotplug_dev), dev, errp);
411}
412
413void pcie_cap_slot_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,
414 Error **errp)
415{
416 PCIDevice *hotplug_pdev = PCI_DEVICE(hotplug_dev);
417 uint8_t *exp_cap = hotplug_pdev->config + hotplug_pdev->exp.exp_cap;
418 PCIDevice *pci_dev = PCI_DEVICE(dev);
419
420
421
422
423 if (!dev->hotplugged) {
424 pci_word_test_and_set_mask(exp_cap + PCI_EXP_SLTSTA,
425 PCI_EXP_SLTSTA_PDS);
426 if (pci_dev->cap_present & QEMU_PCIE_LNKSTA_DLLLA) {
427 pci_word_test_and_set_mask(exp_cap + PCI_EXP_LNKSTA,
428 PCI_EXP_LNKSTA_DLLLA);
429 }
430 return;
431 }
432
433
434
435
436
437 if (pci_get_function_0(pci_dev)) {
438 pci_word_test_and_set_mask(exp_cap + PCI_EXP_SLTSTA,
439 PCI_EXP_SLTSTA_PDS);
440 if (pci_dev->cap_present & QEMU_PCIE_LNKSTA_DLLLA) {
441 pci_word_test_and_set_mask(exp_cap + PCI_EXP_LNKSTA,
442 PCI_EXP_LNKSTA_DLLLA);
443 }
444 pcie_cap_slot_event(PCI_DEVICE(hotplug_dev),
445 PCI_EXP_HP_EV_PDC | PCI_EXP_HP_EV_ABP);
446 }
447}
448
449void pcie_cap_slot_unplug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,
450 Error **errp)
451{
452 object_property_set_bool(OBJECT(dev), false, "realized", NULL);
453}
454
455static void pcie_unplug_device(PCIBus *bus, PCIDevice *dev, void *opaque)
456{
457 HotplugHandler *hotplug_ctrl = qdev_get_hotplug_handler(DEVICE(dev));
458
459 if (dev->partially_hotplugged) {
460 dev->qdev.pending_deleted_event = false;
461 return;
462 }
463 hotplug_handler_unplug(hotplug_ctrl, DEVICE(dev), &error_abort);
464 object_unparent(OBJECT(dev));
465}
466
467void pcie_cap_slot_unplug_request_cb(HotplugHandler *hotplug_dev,
468 DeviceState *dev, Error **errp)
469{
470 Error *local_err = NULL;
471 PCIDevice *pci_dev = PCI_DEVICE(dev);
472 PCIBus *bus = pci_get_bus(pci_dev);
473
474 pcie_cap_slot_plug_common(PCI_DEVICE(hotplug_dev), dev, &local_err);
475 if (local_err) {
476 error_propagate(errp, local_err);
477 return;
478 }
479
480 dev->pending_deleted_event = true;
481
482
483
484
485
486 if (pci_dev->devfn &&
487 !bus->devices[0]) {
488 pcie_unplug_device(bus, pci_dev, NULL);
489
490 return;
491 }
492
493 pcie_cap_slot_push_attention_button(PCI_DEVICE(hotplug_dev));
494}
495
496
497
498void pcie_cap_slot_init(PCIDevice *dev, uint16_t slot)
499{
500 uint32_t pos = dev->exp.exp_cap;
501
502 pci_word_test_and_set_mask(dev->config + pos + PCI_EXP_FLAGS,
503 PCI_EXP_FLAGS_SLOT);
504
505 pci_long_test_and_clear_mask(dev->config + pos + PCI_EXP_SLTCAP,
506 ~PCI_EXP_SLTCAP_PSN);
507 pci_long_test_and_set_mask(dev->config + pos + PCI_EXP_SLTCAP,
508 (slot << PCI_EXP_SLTCAP_PSN_SHIFT) |
509 PCI_EXP_SLTCAP_EIP |
510 PCI_EXP_SLTCAP_HPS |
511 PCI_EXP_SLTCAP_HPC |
512 PCI_EXP_SLTCAP_PIP |
513 PCI_EXP_SLTCAP_AIP |
514 PCI_EXP_SLTCAP_ABP);
515
516 if (dev->cap_present & QEMU_PCIE_SLTCAP_PCP) {
517 pci_long_test_and_set_mask(dev->config + pos + PCI_EXP_SLTCAP,
518 PCI_EXP_SLTCAP_PCP);
519 pci_word_test_and_clear_mask(dev->config + pos + PCI_EXP_SLTCTL,
520 PCI_EXP_SLTCTL_PCC);
521 pci_word_test_and_set_mask(dev->wmask + pos + PCI_EXP_SLTCTL,
522 PCI_EXP_SLTCTL_PCC);
523 }
524
525 pci_word_test_and_clear_mask(dev->config + pos + PCI_EXP_SLTCTL,
526 PCI_EXP_SLTCTL_PIC |
527 PCI_EXP_SLTCTL_AIC);
528 pci_word_test_and_set_mask(dev->config + pos + PCI_EXP_SLTCTL,
529 PCI_EXP_SLTCTL_PIC_OFF |
530 PCI_EXP_SLTCTL_AIC_OFF);
531 pci_word_test_and_set_mask(dev->wmask + pos + PCI_EXP_SLTCTL,
532 PCI_EXP_SLTCTL_PIC |
533 PCI_EXP_SLTCTL_AIC |
534 PCI_EXP_SLTCTL_HPIE |
535 PCI_EXP_SLTCTL_CCIE |
536 PCI_EXP_SLTCTL_PDCE |
537 PCI_EXP_SLTCTL_ABPE);
538
539
540
541
542
543 pci_word_test_and_set_mask(dev->wmask + pos + PCI_EXP_SLTCTL,
544 PCI_EXP_SLTCTL_EIC);
545
546 pci_word_test_and_set_mask(dev->w1cmask + pos + PCI_EXP_SLTSTA,
547 PCI_EXP_HP_EV_SUPPORTED);
548
549 dev->exp.hpev_notified = false;
550
551 qbus_set_hotplug_handler(BUS(pci_bridge_get_sec_bus(PCI_BRIDGE(dev))),
552 OBJECT(dev), NULL);
553}
554
555void pcie_cap_slot_reset(PCIDevice *dev)
556{
557 uint8_t *exp_cap = dev->config + dev->exp.exp_cap;
558 uint8_t port_type = pcie_cap_get_type(dev);
559
560 assert(port_type == PCI_EXP_TYPE_DOWNSTREAM ||
561 port_type == PCI_EXP_TYPE_ROOT_PORT);
562
563 PCIE_DEV_PRINTF(dev, "reset\n");
564
565 pci_word_test_and_clear_mask(exp_cap + PCI_EXP_SLTCTL,
566 PCI_EXP_SLTCTL_EIC |
567 PCI_EXP_SLTCTL_PIC |
568 PCI_EXP_SLTCTL_AIC |
569 PCI_EXP_SLTCTL_HPIE |
570 PCI_EXP_SLTCTL_CCIE |
571 PCI_EXP_SLTCTL_PDCE |
572 PCI_EXP_SLTCTL_ABPE);
573 pci_word_test_and_set_mask(exp_cap + PCI_EXP_SLTCTL,
574 PCI_EXP_SLTCTL_AIC_OFF);
575
576 if (dev->cap_present & QEMU_PCIE_SLTCAP_PCP) {
577
578 bool populated = pci_bridge_get_sec_bus(PCI_BRIDGE(dev))->devices[0];
579 uint16_t pic;
580
581 if (populated) {
582 pci_word_test_and_clear_mask(exp_cap + PCI_EXP_SLTCTL,
583 PCI_EXP_SLTCTL_PCC);
584 } else {
585 pci_word_test_and_set_mask(exp_cap + PCI_EXP_SLTCTL,
586 PCI_EXP_SLTCTL_PCC);
587 }
588
589 pic = populated ? PCI_EXP_SLTCTL_PIC_ON : PCI_EXP_SLTCTL_PIC_OFF;
590 pci_word_test_and_set_mask(exp_cap + PCI_EXP_SLTCTL, pic);
591 }
592
593 pci_word_test_and_clear_mask(exp_cap + PCI_EXP_SLTSTA,
594 PCI_EXP_SLTSTA_EIS |
595
596 PCI_EXP_SLTSTA_CC |
597 PCI_EXP_SLTSTA_PDC |
598 PCI_EXP_SLTSTA_ABP);
599
600 hotplug_event_update_event_status(dev);
601}
602
603void pcie_cap_slot_get(PCIDevice *dev, uint16_t *slt_ctl, uint16_t *slt_sta)
604{
605 uint32_t pos = dev->exp.exp_cap;
606 uint8_t *exp_cap = dev->config + pos;
607 *slt_ctl = pci_get_word(exp_cap + PCI_EXP_SLTCTL);
608 *slt_sta = pci_get_word(exp_cap + PCI_EXP_SLTSTA);
609}
610
611void pcie_cap_slot_write_config(PCIDevice *dev,
612 uint16_t old_slt_ctl, uint16_t old_slt_sta,
613 uint32_t addr, uint32_t val, int len)
614{
615 uint32_t pos = dev->exp.exp_cap;
616 uint8_t *exp_cap = dev->config + pos;
617 uint16_t sltsta = pci_get_word(exp_cap + PCI_EXP_SLTSTA);
618
619 if (ranges_overlap(addr, len, pos + PCI_EXP_SLTSTA, 2)) {
620
621
622
623
624
625
626
627
628
629
630
631#define PCIE_SLOT_EVENTS (PCI_EXP_SLTSTA_ABP | PCI_EXP_SLTSTA_PFD | \
632 PCI_EXP_SLTSTA_MRLSC | PCI_EXP_SLTSTA_PDC | \
633 PCI_EXP_SLTSTA_CC)
634
635 if (val & ~old_slt_sta & PCIE_SLOT_EVENTS) {
636 sltsta = (sltsta & ~PCIE_SLOT_EVENTS) | (old_slt_sta & PCIE_SLOT_EVENTS);
637 pci_set_word(exp_cap + PCI_EXP_SLTSTA, sltsta);
638 }
639 hotplug_event_clear(dev);
640 }
641
642 if (!ranges_overlap(addr, len, pos + PCI_EXP_SLTCTL, 2)) {
643 return;
644 }
645
646 if (pci_word_test_and_clear_mask(exp_cap + PCI_EXP_SLTCTL,
647 PCI_EXP_SLTCTL_EIC)) {
648 sltsta ^= PCI_EXP_SLTSTA_EIS;
649 pci_set_word(exp_cap + PCI_EXP_SLTSTA, sltsta);
650 PCIE_DEV_PRINTF(dev, "PCI_EXP_SLTCTL_EIC: "
651 "sltsta -> 0x%02"PRIx16"\n",
652 sltsta);
653 }
654
655
656
657
658
659
660
661
662
663 if ((sltsta & PCI_EXP_SLTSTA_PDS) && (val & PCI_EXP_SLTCTL_PCC) &&
664 (val & PCI_EXP_SLTCTL_PIC_OFF) == PCI_EXP_SLTCTL_PIC_OFF &&
665 (!(old_slt_ctl & PCI_EXP_SLTCTL_PCC) ||
666 (old_slt_ctl & PCI_EXP_SLTCTL_PIC_OFF) != PCI_EXP_SLTCTL_PIC_OFF)) {
667 PCIBus *sec_bus = pci_bridge_get_sec_bus(PCI_BRIDGE(dev));
668 pci_for_each_device(sec_bus, pci_bus_num(sec_bus),
669 pcie_unplug_device, NULL);
670
671 pci_word_test_and_clear_mask(exp_cap + PCI_EXP_SLTSTA,
672 PCI_EXP_SLTSTA_PDS);
673 if (dev->cap_present & QEMU_PCIE_LNKSTA_DLLLA) {
674 pci_word_test_and_clear_mask(exp_cap + PCI_EXP_LNKSTA,
675 PCI_EXP_LNKSTA_DLLLA);
676 }
677 pci_word_test_and_set_mask(exp_cap + PCI_EXP_SLTSTA,
678 PCI_EXP_SLTSTA_PDC);
679 }
680
681 hotplug_event_notify(dev);
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699 pcie_cap_slot_event(dev, PCI_EXP_HP_EV_CCI);
700}
701
702int pcie_cap_slot_post_load(void *opaque, int version_id)
703{
704 PCIDevice *dev = opaque;
705 hotplug_event_update_event_status(dev);
706 return 0;
707}
708
709void pcie_cap_slot_push_attention_button(PCIDevice *dev)
710{
711 pcie_cap_slot_event(dev, PCI_EXP_HP_EV_ABP);
712}
713
714
715void pcie_cap_root_init(PCIDevice *dev)
716{
717 pci_set_word(dev->wmask + dev->exp.exp_cap + PCI_EXP_RTCTL,
718 PCI_EXP_RTCTL_SECEE | PCI_EXP_RTCTL_SENFEE |
719 PCI_EXP_RTCTL_SEFEE);
720}
721
722void pcie_cap_root_reset(PCIDevice *dev)
723{
724 pci_set_word(dev->config + dev->exp.exp_cap + PCI_EXP_RTCTL, 0);
725}
726
727
728void pcie_cap_flr_init(PCIDevice *dev)
729{
730 pci_long_test_and_set_mask(dev->config + dev->exp.exp_cap + PCI_EXP_DEVCAP,
731 PCI_EXP_DEVCAP_FLR);
732
733
734
735
736
737
738 pci_word_test_and_set_mask(dev->wmask + dev->exp.exp_cap + PCI_EXP_DEVCTL,
739 PCI_EXP_DEVCTL_BCR_FLR);
740}
741
742void pcie_cap_flr_write_config(PCIDevice *dev,
743 uint32_t addr, uint32_t val, int len)
744{
745 uint8_t *devctl = dev->config + dev->exp.exp_cap + PCI_EXP_DEVCTL;
746 if (pci_get_word(devctl) & PCI_EXP_DEVCTL_BCR_FLR) {
747
748
749 pci_device_reset(dev);
750 pci_word_test_and_clear_mask(devctl, PCI_EXP_DEVCTL_BCR_FLR);
751 }
752}
753
754
755
756
757void pcie_cap_arifwd_init(PCIDevice *dev)
758{
759 uint32_t pos = dev->exp.exp_cap;
760 pci_long_test_and_set_mask(dev->config + pos + PCI_EXP_DEVCAP2,
761 PCI_EXP_DEVCAP2_ARI);
762 pci_long_test_and_set_mask(dev->wmask + pos + PCI_EXP_DEVCTL2,
763 PCI_EXP_DEVCTL2_ARI);
764}
765
766void pcie_cap_arifwd_reset(PCIDevice *dev)
767{
768 uint8_t *devctl2 = dev->config + dev->exp.exp_cap + PCI_EXP_DEVCTL2;
769 pci_long_test_and_clear_mask(devctl2, PCI_EXP_DEVCTL2_ARI);
770}
771
772bool pcie_cap_is_arifwd_enabled(const PCIDevice *dev)
773{
774 if (!pci_is_express(dev)) {
775 return false;
776 }
777 if (!dev->exp.exp_cap) {
778 return false;
779 }
780
781 return pci_get_long(dev->config + dev->exp.exp_cap + PCI_EXP_DEVCTL2) &
782 PCI_EXP_DEVCTL2_ARI;
783}
784
785
786
787
788
789
790
791
792
793
794static uint16_t pcie_find_capability_list(PCIDevice *dev, uint32_t cap_id,
795 uint16_t *prev_p)
796{
797 uint16_t prev = 0;
798 uint16_t next;
799 uint32_t header = pci_get_long(dev->config + PCI_CONFIG_SPACE_SIZE);
800
801 if (!header) {
802
803 next = 0;
804 goto out;
805 }
806 for (next = PCI_CONFIG_SPACE_SIZE; next;
807 prev = next, next = PCI_EXT_CAP_NEXT(header)) {
808
809 assert(next >= PCI_CONFIG_SPACE_SIZE);
810 assert(next <= PCIE_CONFIG_SPACE_SIZE - 8);
811
812 header = pci_get_long(dev->config + next);
813 if (PCI_EXT_CAP_ID(header) == cap_id) {
814 break;
815 }
816 }
817
818out:
819 if (prev_p) {
820 *prev_p = prev;
821 }
822 return next;
823}
824
825uint16_t pcie_find_capability(PCIDevice *dev, uint16_t cap_id)
826{
827 return pcie_find_capability_list(dev, cap_id, NULL);
828}
829
830static void pcie_ext_cap_set_next(PCIDevice *dev, uint16_t pos, uint16_t next)
831{
832 uint32_t header = pci_get_long(dev->config + pos);
833 assert(!(next & (PCI_EXT_CAP_ALIGN - 1)));
834 header = (header & ~PCI_EXT_CAP_NEXT_MASK) |
835 ((next << PCI_EXT_CAP_NEXT_SHIFT) & PCI_EXT_CAP_NEXT_MASK);
836 pci_set_long(dev->config + pos, header);
837}
838
839
840
841
842
843
844void pcie_add_capability(PCIDevice *dev,
845 uint16_t cap_id, uint8_t cap_ver,
846 uint16_t offset, uint16_t size)
847{
848 assert(offset >= PCI_CONFIG_SPACE_SIZE);
849 assert(offset < offset + size);
850 assert(offset + size <= PCIE_CONFIG_SPACE_SIZE);
851 assert(size >= 8);
852 assert(pci_is_express(dev));
853
854 if (offset != PCI_CONFIG_SPACE_SIZE) {
855 uint16_t prev;
856
857
858
859
860
861 pcie_find_capability_list(dev, 0xffffffff, &prev);
862 assert(prev >= PCI_CONFIG_SPACE_SIZE);
863 pcie_ext_cap_set_next(dev, prev, offset);
864 }
865 pci_set_long(dev->config + offset, PCI_EXT_CAP(cap_id, cap_ver, 0));
866
867
868 memset(dev->wmask + offset, 0, size);
869 memset(dev->w1cmask + offset, 0, size);
870
871 memset(dev->cmask + offset, 0xFF, size);
872}
873
874
875
876
877
878
879
880
881
882
883
884void pcie_sync_bridge_lnk(PCIDevice *bridge_dev)
885{
886 PCIBridge *br = PCI_BRIDGE(bridge_dev);
887 PCIBus *bus = pci_bridge_get_sec_bus(br);
888 PCIDevice *target = bus->devices[0];
889 uint8_t *exp_cap = bridge_dev->config + bridge_dev->exp.exp_cap;
890 uint16_t lnksta, lnkcap = pci_get_word(exp_cap + PCI_EXP_LNKCAP);
891
892 if (!target || !target->exp.exp_cap) {
893 lnksta = lnkcap;
894 } else {
895 lnksta = target->config_read(target,
896 target->exp.exp_cap + PCI_EXP_LNKSTA,
897 sizeof(lnksta));
898
899 if ((lnksta & PCI_EXP_LNKSTA_NLW) > (lnkcap & PCI_EXP_LNKCAP_MLW)) {
900 lnksta &= ~PCI_EXP_LNKSTA_NLW;
901 lnksta |= lnkcap & PCI_EXP_LNKCAP_MLW;
902 } else if (!(lnksta & PCI_EXP_LNKSTA_NLW)) {
903 lnksta |= QEMU_PCI_EXP_LNKSTA_NLW(QEMU_PCI_EXP_LNK_X1);
904 }
905
906 if ((lnksta & PCI_EXP_LNKSTA_CLS) > (lnkcap & PCI_EXP_LNKCAP_SLS)) {
907 lnksta &= ~PCI_EXP_LNKSTA_CLS;
908 lnksta |= lnkcap & PCI_EXP_LNKCAP_SLS;
909 } else if (!(lnksta & PCI_EXP_LNKSTA_CLS)) {
910 lnksta |= QEMU_PCI_EXP_LNKSTA_CLS(QEMU_PCI_EXP_LNK_2_5GT);
911 }
912 }
913
914 pci_word_test_and_clear_mask(exp_cap + PCI_EXP_LNKSTA,
915 PCI_EXP_LNKSTA_CLS | PCI_EXP_LNKSTA_NLW);
916 pci_word_test_and_set_mask(exp_cap + PCI_EXP_LNKSTA, lnksta &
917 (PCI_EXP_LNKSTA_CLS | PCI_EXP_LNKSTA_NLW));
918}
919
920
921
922
923
924
925void pcie_ari_init(PCIDevice *dev, uint16_t offset, uint16_t nextfn)
926{
927 pcie_add_capability(dev, PCI_EXT_CAP_ID_ARI, PCI_ARI_VER,
928 offset, PCI_ARI_SIZEOF);
929 pci_set_long(dev->config + offset + PCI_ARI_CAP, (nextfn & 0xff) << 8);
930}
931
932void pcie_dev_ser_num_init(PCIDevice *dev, uint16_t offset, uint64_t ser_num)
933{
934 static const int pci_dsn_ver = 1;
935 static const int pci_dsn_cap = 4;
936
937 pcie_add_capability(dev, PCI_EXT_CAP_ID_DSN, pci_dsn_ver, offset,
938 PCI_EXT_CAP_DSN_SIZEOF);
939 pci_set_quad(dev->config + offset + pci_dsn_cap, ser_num);
940}
941
942void pcie_ats_init(PCIDevice *dev, uint16_t offset)
943{
944 pcie_add_capability(dev, PCI_EXT_CAP_ID_ATS, 0x1,
945 offset, PCI_EXT_CAP_ATS_SIZEOF);
946
947 dev->exp.ats_cap = offset;
948
949
950 pci_set_word(dev->config + offset + PCI_ATS_CAP, 0);
951
952 pci_set_word(dev->config + offset + PCI_ATS_CTRL, 0);
953
954 pci_set_word(dev->wmask + dev->exp.ats_cap + PCI_ATS_CTRL, 0x800f);
955}
956
957
958void pcie_acs_init(PCIDevice *dev, uint16_t offset)
959{
960 bool is_downstream = pci_is_express_downstream_port(dev);
961 uint16_t cap_bits = 0;
962
963
964 assert(is_downstream ||
965 (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) ||
966 PCI_FUNC(dev->devfn));
967
968 pcie_add_capability(dev, PCI_EXT_CAP_ID_ACS, PCI_ACS_VER, offset,
969 PCI_ACS_SIZEOF);
970 dev->exp.acs_cap = offset;
971
972 if (is_downstream) {
973
974
975
976
977
978
979
980 cap_bits = PCI_ACS_SV | PCI_ACS_TB | PCI_ACS_RR |
981 PCI_ACS_CR | PCI_ACS_UF | PCI_ACS_DT;
982 }
983
984 pci_set_word(dev->config + offset + PCI_ACS_CAP, cap_bits);
985 pci_set_word(dev->wmask + offset + PCI_ACS_CTRL, cap_bits);
986}
987
988void pcie_acs_reset(PCIDevice *dev)
989{
990 if (dev->exp.acs_cap) {
991 pci_set_word(dev->config + dev->exp.acs_cap + PCI_ACS_CTRL, 0);
992 }
993}
994