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14#include "qemu/osdep.h"
15#include "qapi/error.h"
16#include "qapi/visitor.h"
17#include "cpu.h"
18#include "s390-pci-bus.h"
19#include "s390-pci-inst.h"
20#include "hw/pci/pci_bus.h"
21#include "hw/qdev-properties.h"
22#include "hw/pci/pci_bridge.h"
23#include "hw/pci/msi.h"
24#include "qemu/error-report.h"
25#include "qemu/module.h"
26
27#ifndef DEBUG_S390PCI_BUS
28#define DEBUG_S390PCI_BUS 0
29#endif
30
31#define DPRINTF(fmt, ...) \
32 do { \
33 if (DEBUG_S390PCI_BUS) { \
34 fprintf(stderr, "S390pci-bus: " fmt, ## __VA_ARGS__); \
35 } \
36 } while (0)
37
38S390pciState *s390_get_phb(void)
39{
40 static S390pciState *phb;
41
42 if (!phb) {
43 phb = S390_PCI_HOST_BRIDGE(
44 object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL));
45 assert(phb != NULL);
46 }
47
48 return phb;
49}
50
51int pci_chsc_sei_nt2_get_event(void *res)
52{
53 ChscSeiNt2Res *nt2_res = (ChscSeiNt2Res *)res;
54 PciCcdfAvail *accdf;
55 PciCcdfErr *eccdf;
56 int rc = 1;
57 SeiContainer *sei_cont;
58 S390pciState *s = s390_get_phb();
59
60 sei_cont = QTAILQ_FIRST(&s->pending_sei);
61 if (sei_cont) {
62 QTAILQ_REMOVE(&s->pending_sei, sei_cont, link);
63 nt2_res->nt = 2;
64 nt2_res->cc = sei_cont->cc;
65 nt2_res->length = cpu_to_be16(sizeof(ChscSeiNt2Res));
66 switch (sei_cont->cc) {
67 case 1:
68 eccdf = (PciCcdfErr *)nt2_res->ccdf;
69 eccdf->fid = cpu_to_be32(sei_cont->fid);
70 eccdf->fh = cpu_to_be32(sei_cont->fh);
71 eccdf->e = cpu_to_be32(sei_cont->e);
72 eccdf->faddr = cpu_to_be64(sei_cont->faddr);
73 eccdf->pec = cpu_to_be16(sei_cont->pec);
74 break;
75 case 2:
76 accdf = (PciCcdfAvail *)nt2_res->ccdf;
77 accdf->fid = cpu_to_be32(sei_cont->fid);
78 accdf->fh = cpu_to_be32(sei_cont->fh);
79 accdf->pec = cpu_to_be16(sei_cont->pec);
80 break;
81 default:
82 abort();
83 }
84 g_free(sei_cont);
85 rc = 0;
86 }
87
88 return rc;
89}
90
91int pci_chsc_sei_nt2_have_event(void)
92{
93 S390pciState *s = s390_get_phb();
94
95 return !QTAILQ_EMPTY(&s->pending_sei);
96}
97
98S390PCIBusDevice *s390_pci_find_next_avail_dev(S390pciState *s,
99 S390PCIBusDevice *pbdev)
100{
101 S390PCIBusDevice *ret = pbdev ? QTAILQ_NEXT(pbdev, link) :
102 QTAILQ_FIRST(&s->zpci_devs);
103
104 while (ret && ret->state == ZPCI_FS_RESERVED) {
105 ret = QTAILQ_NEXT(ret, link);
106 }
107
108 return ret;
109}
110
111S390PCIBusDevice *s390_pci_find_dev_by_fid(S390pciState *s, uint32_t fid)
112{
113 S390PCIBusDevice *pbdev;
114
115 QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) {
116 if (pbdev->fid == fid) {
117 return pbdev;
118 }
119 }
120
121 return NULL;
122}
123
124void s390_pci_sclp_configure(SCCB *sccb)
125{
126 IoaCfgSccb *psccb = (IoaCfgSccb *)sccb;
127 S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(s390_get_phb(),
128 be32_to_cpu(psccb->aid));
129 uint16_t rc;
130
131 if (!pbdev) {
132 DPRINTF("sclp config no dev found\n");
133 rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED;
134 goto out;
135 }
136
137 switch (pbdev->state) {
138 case ZPCI_FS_RESERVED:
139 rc = SCLP_RC_ADAPTER_IN_RESERVED_STATE;
140 break;
141 case ZPCI_FS_STANDBY:
142 pbdev->state = ZPCI_FS_DISABLED;
143 rc = SCLP_RC_NORMAL_COMPLETION;
144 break;
145 default:
146 rc = SCLP_RC_NO_ACTION_REQUIRED;
147 }
148out:
149 psccb->header.response_code = cpu_to_be16(rc);
150}
151
152static void s390_pci_perform_unplug(S390PCIBusDevice *pbdev)
153{
154 HotplugHandler *hotplug_ctrl;
155
156
157 if (pbdev->pdev) {
158 DeviceState *pdev = DEVICE(pbdev->pdev);
159
160 hotplug_ctrl = qdev_get_hotplug_handler(pdev);
161 hotplug_handler_unplug(hotplug_ctrl, pdev, &error_abort);
162 object_unparent(OBJECT(pdev));
163 }
164
165
166 hotplug_ctrl = qdev_get_hotplug_handler(DEVICE(pbdev));
167 hotplug_handler_unplug(hotplug_ctrl, DEVICE(pbdev), &error_abort);
168 object_unparent(OBJECT(pbdev));
169}
170
171void s390_pci_sclp_deconfigure(SCCB *sccb)
172{
173 IoaCfgSccb *psccb = (IoaCfgSccb *)sccb;
174 S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(s390_get_phb(),
175 be32_to_cpu(psccb->aid));
176 uint16_t rc;
177
178 if (!pbdev) {
179 DPRINTF("sclp deconfig no dev found\n");
180 rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED;
181 goto out;
182 }
183
184 switch (pbdev->state) {
185 case ZPCI_FS_RESERVED:
186 rc = SCLP_RC_ADAPTER_IN_RESERVED_STATE;
187 break;
188 case ZPCI_FS_STANDBY:
189 rc = SCLP_RC_NO_ACTION_REQUIRED;
190 break;
191 default:
192 if (pbdev->summary_ind) {
193 pci_dereg_irqs(pbdev);
194 }
195 if (pbdev->iommu->enabled) {
196 pci_dereg_ioat(pbdev->iommu);
197 }
198 pbdev->state = ZPCI_FS_STANDBY;
199 rc = SCLP_RC_NORMAL_COMPLETION;
200
201 if (pbdev->unplug_requested) {
202 s390_pci_perform_unplug(pbdev);
203 }
204 }
205out:
206 psccb->header.response_code = cpu_to_be16(rc);
207}
208
209static S390PCIBusDevice *s390_pci_find_dev_by_uid(S390pciState *s, uint16_t uid)
210{
211 S390PCIBusDevice *pbdev;
212
213 QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) {
214 if (pbdev->uid == uid) {
215 return pbdev;
216 }
217 }
218
219 return NULL;
220}
221
222S390PCIBusDevice *s390_pci_find_dev_by_target(S390pciState *s,
223 const char *target)
224{
225 S390PCIBusDevice *pbdev;
226
227 if (!target) {
228 return NULL;
229 }
230
231 QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) {
232 if (!strcmp(pbdev->target, target)) {
233 return pbdev;
234 }
235 }
236
237 return NULL;
238}
239
240static S390PCIBusDevice *s390_pci_find_dev_by_pci(S390pciState *s,
241 PCIDevice *pci_dev)
242{
243 S390PCIBusDevice *pbdev;
244
245 if (!pci_dev) {
246 return NULL;
247 }
248
249 QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) {
250 if (pbdev->pdev == pci_dev) {
251 return pbdev;
252 }
253 }
254
255 return NULL;
256}
257
258S390PCIBusDevice *s390_pci_find_dev_by_idx(S390pciState *s, uint32_t idx)
259{
260 return g_hash_table_lookup(s->zpci_table, &idx);
261}
262
263S390PCIBusDevice *s390_pci_find_dev_by_fh(S390pciState *s, uint32_t fh)
264{
265 uint32_t idx = FH_MASK_INDEX & fh;
266 S390PCIBusDevice *pbdev = s390_pci_find_dev_by_idx(s, idx);
267
268 if (pbdev && pbdev->fh == fh) {
269 return pbdev;
270 }
271
272 return NULL;
273}
274
275static void s390_pci_generate_event(uint8_t cc, uint16_t pec, uint32_t fh,
276 uint32_t fid, uint64_t faddr, uint32_t e)
277{
278 SeiContainer *sei_cont;
279 S390pciState *s = s390_get_phb();
280
281 sei_cont = g_new0(SeiContainer, 1);
282 sei_cont->fh = fh;
283 sei_cont->fid = fid;
284 sei_cont->cc = cc;
285 sei_cont->pec = pec;
286 sei_cont->faddr = faddr;
287 sei_cont->e = e;
288
289 QTAILQ_INSERT_TAIL(&s->pending_sei, sei_cont, link);
290 css_generate_css_crws(0);
291}
292
293static void s390_pci_generate_plug_event(uint16_t pec, uint32_t fh,
294 uint32_t fid)
295{
296 s390_pci_generate_event(2, pec, fh, fid, 0, 0);
297}
298
299void s390_pci_generate_error_event(uint16_t pec, uint32_t fh, uint32_t fid,
300 uint64_t faddr, uint32_t e)
301{
302 s390_pci_generate_event(1, pec, fh, fid, faddr, e);
303}
304
305static void s390_pci_set_irq(void *opaque, int irq, int level)
306{
307
308}
309
310static int s390_pci_map_irq(PCIDevice *pci_dev, int irq_num)
311{
312
313 return 0;
314}
315
316static uint64_t s390_pci_get_table_origin(uint64_t iota)
317{
318 return iota & ~ZPCI_IOTA_RTTO_FLAG;
319}
320
321static unsigned int calc_rtx(dma_addr_t ptr)
322{
323 return ((unsigned long) ptr >> ZPCI_RT_SHIFT) & ZPCI_INDEX_MASK;
324}
325
326static unsigned int calc_sx(dma_addr_t ptr)
327{
328 return ((unsigned long) ptr >> ZPCI_ST_SHIFT) & ZPCI_INDEX_MASK;
329}
330
331static unsigned int calc_px(dma_addr_t ptr)
332{
333 return ((unsigned long) ptr >> PAGE_SHIFT) & ZPCI_PT_MASK;
334}
335
336static uint64_t get_rt_sto(uint64_t entry)
337{
338 return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_RTX)
339 ? (entry & ZPCI_RTE_ADDR_MASK)
340 : 0;
341}
342
343static uint64_t get_st_pto(uint64_t entry)
344{
345 return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_SX)
346 ? (entry & ZPCI_STE_ADDR_MASK)
347 : 0;
348}
349
350static bool rt_entry_isvalid(uint64_t entry)
351{
352 return (entry & ZPCI_TABLE_VALID_MASK) == ZPCI_TABLE_VALID;
353}
354
355static bool pt_entry_isvalid(uint64_t entry)
356{
357 return (entry & ZPCI_PTE_VALID_MASK) == ZPCI_PTE_VALID;
358}
359
360static bool entry_isprotected(uint64_t entry)
361{
362 return (entry & ZPCI_TABLE_PROT_MASK) == ZPCI_TABLE_PROTECTED;
363}
364
365
366static uint64_t get_table_index(uint64_t iova, int8_t ett)
367{
368 switch (ett) {
369 case ZPCI_ETT_PT:
370 return calc_px(iova);
371 case ZPCI_ETT_ST:
372 return calc_sx(iova);
373 case ZPCI_ETT_RT:
374 return calc_rtx(iova);
375 }
376
377 return -1;
378}
379
380static bool entry_isvalid(uint64_t entry, int8_t ett)
381{
382 switch (ett) {
383 case ZPCI_ETT_PT:
384 return pt_entry_isvalid(entry);
385 case ZPCI_ETT_ST:
386 case ZPCI_ETT_RT:
387 return rt_entry_isvalid(entry);
388 }
389
390 return false;
391}
392
393
394static bool translate_iscomplete(uint64_t entry, int8_t ett)
395{
396 switch (ett) {
397 case 0:
398 return (entry & ZPCI_TABLE_FC) ? true : false;
399 case 1:
400 return false;
401 }
402
403 return true;
404}
405
406static uint64_t get_frame_size(int8_t ett)
407{
408 switch (ett) {
409 case ZPCI_ETT_PT:
410 return 1ULL << 12;
411 case ZPCI_ETT_ST:
412 return 1ULL << 20;
413 case ZPCI_ETT_RT:
414 return 1ULL << 31;
415 }
416
417 return 0;
418}
419
420static uint64_t get_next_table_origin(uint64_t entry, int8_t ett)
421{
422 switch (ett) {
423 case ZPCI_ETT_PT:
424 return entry & ZPCI_PTE_ADDR_MASK;
425 case ZPCI_ETT_ST:
426 return get_st_pto(entry);
427 case ZPCI_ETT_RT:
428 return get_rt_sto(entry);
429 }
430
431 return 0;
432}
433
434
435
436
437
438
439
440
441
442
443static uint64_t table_translate(S390IOTLBEntry *entry, uint64_t to, int8_t ett,
444 uint16_t *error)
445{
446 uint64_t tx, te, nto = 0;
447 uint16_t err = 0;
448
449 tx = get_table_index(entry->iova, ett);
450 te = address_space_ldq(&address_space_memory, to + tx * sizeof(uint64_t),
451 MEMTXATTRS_UNSPECIFIED, NULL);
452
453 if (!te) {
454 err = ERR_EVENT_INVALTE;
455 goto out;
456 }
457
458 if (!entry_isvalid(te, ett)) {
459 entry->perm &= IOMMU_NONE;
460 goto out;
461 }
462
463 if (ett == ZPCI_ETT_RT && ((te & ZPCI_TABLE_LEN_RTX) != ZPCI_TABLE_LEN_RTX
464 || te & ZPCI_TABLE_OFFSET_MASK)) {
465 err = ERR_EVENT_INVALTL;
466 goto out;
467 }
468
469 nto = get_next_table_origin(te, ett);
470 if (!nto) {
471 err = ERR_EVENT_TT;
472 goto out;
473 }
474
475 if (entry_isprotected(te)) {
476 entry->perm &= IOMMU_RO;
477 } else {
478 entry->perm &= IOMMU_RW;
479 }
480
481 if (translate_iscomplete(te, ett)) {
482 switch (ett) {
483 case ZPCI_ETT_PT:
484 entry->translated_addr = te & ZPCI_PTE_ADDR_MASK;
485 break;
486 case ZPCI_ETT_ST:
487 entry->translated_addr = (te & ZPCI_SFAA_MASK) |
488 (entry->iova & ~ZPCI_SFAA_MASK);
489 break;
490 }
491 nto = 0;
492 }
493out:
494 if (err) {
495 entry->perm = IOMMU_NONE;
496 *error = err;
497 }
498 entry->len = get_frame_size(ett);
499 return nto;
500}
501
502uint16_t s390_guest_io_table_walk(uint64_t g_iota, hwaddr addr,
503 S390IOTLBEntry *entry)
504{
505 uint64_t to = s390_pci_get_table_origin(g_iota);
506 int8_t ett = 1;
507 uint16_t error = 0;
508
509 entry->iova = addr & PAGE_MASK;
510 entry->translated_addr = 0;
511 entry->perm = IOMMU_RW;
512
513 if (entry_isprotected(g_iota)) {
514 entry->perm &= IOMMU_RO;
515 }
516
517 while (to) {
518 to = table_translate(entry, to, ett--, &error);
519 }
520
521 return error;
522}
523
524static IOMMUTLBEntry s390_translate_iommu(IOMMUMemoryRegion *mr, hwaddr addr,
525 IOMMUAccessFlags flag, int iommu_idx)
526{
527 S390PCIIOMMU *iommu = container_of(mr, S390PCIIOMMU, iommu_mr);
528 S390IOTLBEntry *entry;
529 uint64_t iova = addr & PAGE_MASK;
530 uint16_t error = 0;
531 IOMMUTLBEntry ret = {
532 .target_as = &address_space_memory,
533 .iova = 0,
534 .translated_addr = 0,
535 .addr_mask = ~(hwaddr)0,
536 .perm = IOMMU_NONE,
537 };
538
539 switch (iommu->pbdev->state) {
540 case ZPCI_FS_ENABLED:
541 case ZPCI_FS_BLOCKED:
542 if (!iommu->enabled) {
543 return ret;
544 }
545 break;
546 default:
547 return ret;
548 }
549
550 DPRINTF("iommu trans addr 0x%" PRIx64 "\n", addr);
551
552 if (addr < iommu->pba || addr > iommu->pal) {
553 error = ERR_EVENT_OORANGE;
554 goto err;
555 }
556
557 entry = g_hash_table_lookup(iommu->iotlb, &iova);
558 if (entry) {
559 ret.iova = entry->iova;
560 ret.translated_addr = entry->translated_addr;
561 ret.addr_mask = entry->len - 1;
562 ret.perm = entry->perm;
563 } else {
564 ret.iova = iova;
565 ret.addr_mask = ~PAGE_MASK;
566 ret.perm = IOMMU_NONE;
567 }
568
569 if (flag != IOMMU_NONE && !(flag & ret.perm)) {
570 error = ERR_EVENT_TPROTE;
571 }
572err:
573 if (error) {
574 iommu->pbdev->state = ZPCI_FS_ERROR;
575 s390_pci_generate_error_event(error, iommu->pbdev->fh,
576 iommu->pbdev->fid, addr, 0);
577 }
578 return ret;
579}
580
581static void s390_pci_iommu_replay(IOMMUMemoryRegion *iommu,
582 IOMMUNotifier *notifier)
583{
584
585
586
587
588
589 return;
590}
591
592static S390PCIIOMMU *s390_pci_get_iommu(S390pciState *s, PCIBus *bus,
593 int devfn)
594{
595 uint64_t key = (uintptr_t)bus;
596 S390PCIIOMMUTable *table = g_hash_table_lookup(s->iommu_table, &key);
597 S390PCIIOMMU *iommu;
598
599 if (!table) {
600 table = g_new0(S390PCIIOMMUTable, 1);
601 table->key = key;
602 g_hash_table_insert(s->iommu_table, &table->key, table);
603 }
604
605 iommu = table->iommu[PCI_SLOT(devfn)];
606 if (!iommu) {
607 iommu = S390_PCI_IOMMU(object_new(TYPE_S390_PCI_IOMMU));
608
609 char *mr_name = g_strdup_printf("iommu-root-%02x:%02x.%01x",
610 pci_bus_num(bus),
611 PCI_SLOT(devfn),
612 PCI_FUNC(devfn));
613 char *as_name = g_strdup_printf("iommu-pci-%02x:%02x.%01x",
614 pci_bus_num(bus),
615 PCI_SLOT(devfn),
616 PCI_FUNC(devfn));
617 memory_region_init(&iommu->mr, OBJECT(iommu), mr_name, UINT64_MAX);
618 address_space_init(&iommu->as, &iommu->mr, as_name);
619 iommu->iotlb = g_hash_table_new_full(g_int64_hash, g_int64_equal,
620 NULL, g_free);
621 table->iommu[PCI_SLOT(devfn)] = iommu;
622
623 g_free(mr_name);
624 g_free(as_name);
625 }
626
627 return iommu;
628}
629
630static AddressSpace *s390_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn)
631{
632 S390pciState *s = opaque;
633 S390PCIIOMMU *iommu = s390_pci_get_iommu(s, bus, devfn);
634
635 return &iommu->as;
636}
637
638static uint8_t set_ind_atomic(uint64_t ind_loc, uint8_t to_be_set)
639{
640 uint8_t ind_old, ind_new;
641 hwaddr len = 1;
642 uint8_t *ind_addr;
643
644 ind_addr = cpu_physical_memory_map(ind_loc, &len, 1);
645 if (!ind_addr) {
646 s390_pci_generate_error_event(ERR_EVENT_AIRERR, 0, 0, 0, 0);
647 return -1;
648 }
649 do {
650 ind_old = *ind_addr;
651 ind_new = ind_old | to_be_set;
652 } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old);
653 cpu_physical_memory_unmap(ind_addr, len, 1, len);
654
655 return ind_old;
656}
657
658static void s390_msi_ctrl_write(void *opaque, hwaddr addr, uint64_t data,
659 unsigned int size)
660{
661 S390PCIBusDevice *pbdev = opaque;
662 uint32_t vec = data & ZPCI_MSI_VEC_MASK;
663 uint64_t ind_bit;
664 uint32_t sum_bit;
665
666 assert(pbdev);
667 DPRINTF("write_msix data 0x%" PRIx64 " idx %d vec 0x%x\n", data,
668 pbdev->idx, vec);
669
670 if (pbdev->state != ZPCI_FS_ENABLED) {
671 return;
672 }
673
674 ind_bit = pbdev->routes.adapter.ind_offset;
675 sum_bit = pbdev->routes.adapter.summary_offset;
676
677 set_ind_atomic(pbdev->routes.adapter.ind_addr + (ind_bit + vec) / 8,
678 0x80 >> ((ind_bit + vec) % 8));
679 if (!set_ind_atomic(pbdev->routes.adapter.summary_addr + sum_bit / 8,
680 0x80 >> (sum_bit % 8))) {
681 css_adapter_interrupt(CSS_IO_ADAPTER_PCI, pbdev->isc);
682 }
683}
684
685static uint64_t s390_msi_ctrl_read(void *opaque, hwaddr addr, unsigned size)
686{
687 return 0xffffffff;
688}
689
690static const MemoryRegionOps s390_msi_ctrl_ops = {
691 .write = s390_msi_ctrl_write,
692 .read = s390_msi_ctrl_read,
693 .endianness = DEVICE_LITTLE_ENDIAN,
694};
695
696void s390_pci_iommu_enable(S390PCIIOMMU *iommu)
697{
698
699
700
701
702
703 char *name = g_strdup_printf("iommu-s390-%04x", iommu->pbdev->uid);
704 memory_region_init_iommu(&iommu->iommu_mr, sizeof(iommu->iommu_mr),
705 TYPE_S390_IOMMU_MEMORY_REGION, OBJECT(&iommu->mr),
706 name, iommu->pal + 1);
707 iommu->enabled = true;
708 memory_region_add_subregion(&iommu->mr, 0, MEMORY_REGION(&iommu->iommu_mr));
709 g_free(name);
710}
711
712void s390_pci_iommu_disable(S390PCIIOMMU *iommu)
713{
714 iommu->enabled = false;
715 g_hash_table_remove_all(iommu->iotlb);
716 memory_region_del_subregion(&iommu->mr, MEMORY_REGION(&iommu->iommu_mr));
717 object_unparent(OBJECT(&iommu->iommu_mr));
718}
719
720static void s390_pci_iommu_free(S390pciState *s, PCIBus *bus, int32_t devfn)
721{
722 uint64_t key = (uintptr_t)bus;
723 S390PCIIOMMUTable *table = g_hash_table_lookup(s->iommu_table, &key);
724 S390PCIIOMMU *iommu = table ? table->iommu[PCI_SLOT(devfn)] : NULL;
725
726 if (!table || !iommu) {
727 return;
728 }
729
730 table->iommu[PCI_SLOT(devfn)] = NULL;
731 g_hash_table_destroy(iommu->iotlb);
732 address_space_destroy(&iommu->as);
733 object_unparent(OBJECT(&iommu->mr));
734 object_unparent(OBJECT(iommu));
735 object_unref(OBJECT(iommu));
736}
737
738static void s390_pcihost_realize(DeviceState *dev, Error **errp)
739{
740 PCIBus *b;
741 BusState *bus;
742 PCIHostState *phb = PCI_HOST_BRIDGE(dev);
743 S390pciState *s = S390_PCI_HOST_BRIDGE(dev);
744 Error *local_err = NULL;
745
746 DPRINTF("host_init\n");
747
748 b = pci_register_root_bus(dev, NULL, s390_pci_set_irq, s390_pci_map_irq,
749 NULL, get_system_memory(), get_system_io(), 0,
750 64, TYPE_PCI_BUS);
751 pci_setup_iommu(b, s390_pci_dma_iommu, s);
752
753 bus = BUS(b);
754 qbus_set_hotplug_handler(bus, OBJECT(dev), &local_err);
755 if (local_err) {
756 error_propagate(errp, local_err);
757 return;
758 }
759 phb->bus = b;
760
761 s->bus = S390_PCI_BUS(qbus_create(TYPE_S390_PCI_BUS, dev, NULL));
762 qbus_set_hotplug_handler(BUS(s->bus), OBJECT(dev), &local_err);
763 if (local_err) {
764 error_propagate(errp, local_err);
765 return;
766 }
767
768 s->iommu_table = g_hash_table_new_full(g_int64_hash, g_int64_equal,
769 NULL, g_free);
770 s->zpci_table = g_hash_table_new_full(g_int_hash, g_int_equal, NULL, NULL);
771 s->bus_no = 0;
772 QTAILQ_INIT(&s->pending_sei);
773 QTAILQ_INIT(&s->zpci_devs);
774
775 css_register_io_adapters(CSS_IO_ADAPTER_PCI, true, false,
776 S390_ADAPTER_SUPPRESSIBLE, &local_err);
777 error_propagate(errp, local_err);
778}
779
780static int s390_pci_msix_init(S390PCIBusDevice *pbdev)
781{
782 char *name;
783 uint8_t pos;
784 uint16_t ctrl;
785 uint32_t table, pba;
786
787 pos = pci_find_capability(pbdev->pdev, PCI_CAP_ID_MSIX);
788 if (!pos) {
789 return -1;
790 }
791
792 ctrl = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_FLAGS,
793 pci_config_size(pbdev->pdev), sizeof(ctrl));
794 table = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_TABLE,
795 pci_config_size(pbdev->pdev), sizeof(table));
796 pba = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_PBA,
797 pci_config_size(pbdev->pdev), sizeof(pba));
798
799 pbdev->msix.table_bar = table & PCI_MSIX_FLAGS_BIRMASK;
800 pbdev->msix.table_offset = table & ~PCI_MSIX_FLAGS_BIRMASK;
801 pbdev->msix.pba_bar = pba & PCI_MSIX_FLAGS_BIRMASK;
802 pbdev->msix.pba_offset = pba & ~PCI_MSIX_FLAGS_BIRMASK;
803 pbdev->msix.entries = (ctrl & PCI_MSIX_FLAGS_QSIZE) + 1;
804
805 name = g_strdup_printf("msix-s390-%04x", pbdev->uid);
806 memory_region_init_io(&pbdev->msix_notify_mr, OBJECT(pbdev),
807 &s390_msi_ctrl_ops, pbdev, name, PAGE_SIZE);
808 memory_region_add_subregion(&pbdev->iommu->mr, ZPCI_MSI_ADDR,
809 &pbdev->msix_notify_mr);
810 g_free(name);
811
812 return 0;
813}
814
815static void s390_pci_msix_free(S390PCIBusDevice *pbdev)
816{
817 memory_region_del_subregion(&pbdev->iommu->mr, &pbdev->msix_notify_mr);
818 object_unparent(OBJECT(&pbdev->msix_notify_mr));
819}
820
821static S390PCIBusDevice *s390_pci_device_new(S390pciState *s,
822 const char *target, Error **errp)
823{
824 Error *local_err = NULL;
825 DeviceState *dev;
826
827 dev = qdev_try_create(BUS(s->bus), TYPE_S390_PCI_DEVICE);
828 if (!dev) {
829 error_setg(errp, "zPCI device could not be created");
830 return NULL;
831 }
832
833 object_property_set_str(OBJECT(dev), target, "target", &local_err);
834 if (local_err) {
835 object_unparent(OBJECT(dev));
836 error_propagate_prepend(errp, local_err,
837 "zPCI device could not be created: ");
838 return NULL;
839 }
840 object_property_set_bool(OBJECT(dev), true, "realized", &local_err);
841 if (local_err) {
842 object_unparent(OBJECT(dev));
843 error_propagate_prepend(errp, local_err,
844 "zPCI device could not be created: ");
845 return NULL;
846 }
847
848 return S390_PCI_DEVICE(dev);
849}
850
851static bool s390_pci_alloc_idx(S390pciState *s, S390PCIBusDevice *pbdev)
852{
853 uint32_t idx;
854
855 idx = s->next_idx;
856 while (s390_pci_find_dev_by_idx(s, idx)) {
857 idx = (idx + 1) & FH_MASK_INDEX;
858 if (idx == s->next_idx) {
859 return false;
860 }
861 }
862
863 pbdev->idx = idx;
864 return true;
865}
866
867static void s390_pcihost_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
868 Error **errp)
869{
870 S390pciState *s = S390_PCI_HOST_BRIDGE(hotplug_dev);
871
872 if (!s390_has_feat(S390_FEAT_ZPCI)) {
873 warn_report("Plugging a PCI/zPCI device without the 'zpci' CPU "
874 "feature enabled; the guest will not be able to see/use "
875 "this device");
876 }
877
878 if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
879 PCIDevice *pdev = PCI_DEVICE(dev);
880
881 if (pdev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
882 error_setg(errp, "multifunction not supported in s390");
883 return;
884 }
885 } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) {
886 S390PCIBusDevice *pbdev = S390_PCI_DEVICE(dev);
887
888 if (!s390_pci_alloc_idx(s, pbdev)) {
889 error_setg(errp, "no slot for plugging zpci device");
890 return;
891 }
892 }
893}
894
895static void s390_pci_update_subordinate(PCIDevice *dev, uint32_t nr)
896{
897 uint32_t old_nr;
898
899 pci_default_write_config(dev, PCI_SUBORDINATE_BUS, nr, 1);
900 while (!pci_bus_is_root(pci_get_bus(dev))) {
901 dev = pci_get_bus(dev)->parent_dev;
902
903 old_nr = pci_default_read_config(dev, PCI_SUBORDINATE_BUS, 1);
904 if (old_nr < nr) {
905 pci_default_write_config(dev, PCI_SUBORDINATE_BUS, nr, 1);
906 }
907 }
908}
909
910static void s390_pcihost_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
911 Error **errp)
912{
913 S390pciState *s = S390_PCI_HOST_BRIDGE(hotplug_dev);
914 PCIDevice *pdev = NULL;
915 S390PCIBusDevice *pbdev = NULL;
916
917 if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) {
918 PCIBridge *pb = PCI_BRIDGE(dev);
919
920 pdev = PCI_DEVICE(dev);
921 pci_bridge_map_irq(pb, dev->id, s390_pci_map_irq);
922 pci_setup_iommu(&pb->sec_bus, s390_pci_dma_iommu, s);
923
924 qbus_set_hotplug_handler(BUS(&pb->sec_bus), OBJECT(s), errp);
925
926 if (dev->hotplugged) {
927 pci_default_write_config(pdev, PCI_PRIMARY_BUS,
928 pci_dev_bus_num(pdev), 1);
929 s->bus_no += 1;
930 pci_default_write_config(pdev, PCI_SECONDARY_BUS, s->bus_no, 1);
931
932 s390_pci_update_subordinate(pdev, s->bus_no);
933 }
934 } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
935 pdev = PCI_DEVICE(dev);
936
937 if (!dev->id) {
938
939
940 dev->id = g_strdup_printf("auto_%02x:%02x.%01x",
941 pci_dev_bus_num(pdev),
942 PCI_SLOT(pdev->devfn),
943 PCI_FUNC(pdev->devfn));
944 }
945
946 pbdev = s390_pci_find_dev_by_target(s, dev->id);
947 if (!pbdev) {
948 pbdev = s390_pci_device_new(s, dev->id, errp);
949 if (!pbdev) {
950 return;
951 }
952 }
953
954 if (object_dynamic_cast(OBJECT(dev), "vfio-pci")) {
955 pbdev->fh |= FH_SHM_VFIO;
956 } else {
957 pbdev->fh |= FH_SHM_EMUL;
958 }
959
960 pbdev->pdev = pdev;
961 pbdev->iommu = s390_pci_get_iommu(s, pci_get_bus(pdev), pdev->devfn);
962 pbdev->iommu->pbdev = pbdev;
963 pbdev->state = ZPCI_FS_DISABLED;
964
965 if (s390_pci_msix_init(pbdev)) {
966 error_setg(errp, "MSI-X support is mandatory "
967 "in the S390 architecture");
968 return;
969 }
970
971 if (dev->hotplugged) {
972 s390_pci_generate_plug_event(HP_EVENT_TO_CONFIGURED ,
973 pbdev->fh, pbdev->fid);
974 }
975 } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) {
976 pbdev = S390_PCI_DEVICE(dev);
977
978
979 s->next_idx = (pbdev->idx + 1) & FH_MASK_INDEX;
980 pbdev->fh = pbdev->idx;
981 QTAILQ_INSERT_TAIL(&s->zpci_devs, pbdev, link);
982 g_hash_table_insert(s->zpci_table, &pbdev->idx, pbdev);
983 } else {
984 g_assert_not_reached();
985 }
986}
987
988static void s390_pcihost_unplug(HotplugHandler *hotplug_dev, DeviceState *dev,
989 Error **errp)
990{
991 S390pciState *s = S390_PCI_HOST_BRIDGE(hotplug_dev);
992 S390PCIBusDevice *pbdev = NULL;
993
994 if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
995 PCIDevice *pci_dev = PCI_DEVICE(dev);
996 PCIBus *bus;
997 int32_t devfn;
998
999 pbdev = s390_pci_find_dev_by_pci(s, PCI_DEVICE(dev));
1000 g_assert(pbdev);
1001
1002 s390_pci_generate_plug_event(HP_EVENT_STANDBY_TO_RESERVED,
1003 pbdev->fh, pbdev->fid);
1004 bus = pci_get_bus(pci_dev);
1005 devfn = pci_dev->devfn;
1006 object_property_set_bool(OBJECT(dev), false, "realized", NULL);
1007
1008 s390_pci_msix_free(pbdev);
1009 s390_pci_iommu_free(s, bus, devfn);
1010 pbdev->pdev = NULL;
1011 pbdev->state = ZPCI_FS_RESERVED;
1012 } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) {
1013 pbdev = S390_PCI_DEVICE(dev);
1014 pbdev->fid = 0;
1015 QTAILQ_REMOVE(&s->zpci_devs, pbdev, link);
1016 g_hash_table_remove(s->zpci_table, &pbdev->idx);
1017 object_property_set_bool(OBJECT(dev), false, "realized", NULL);
1018 }
1019}
1020
1021static void s390_pcihost_unplug_request(HotplugHandler *hotplug_dev,
1022 DeviceState *dev,
1023 Error **errp)
1024{
1025 S390pciState *s = S390_PCI_HOST_BRIDGE(hotplug_dev);
1026 S390PCIBusDevice *pbdev;
1027
1028 if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) {
1029 error_setg(errp, "PCI bridge hot unplug currently not supported");
1030 } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
1031
1032
1033
1034
1035 pbdev = s390_pci_find_dev_by_pci(s, PCI_DEVICE(dev));
1036 g_assert(pbdev);
1037 pbdev->pci_unplug_request_processed = true;
1038 qdev_unplug(DEVICE(pbdev), errp);
1039 } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) {
1040 pbdev = S390_PCI_DEVICE(dev);
1041
1042
1043
1044
1045
1046
1047
1048 if (pbdev->pdev && !pbdev->pci_unplug_request_processed) {
1049 qdev_unplug(DEVICE(pbdev->pdev), errp);
1050 return;
1051 }
1052 pbdev->pci_unplug_request_processed = false;
1053
1054 switch (pbdev->state) {
1055 case ZPCI_FS_STANDBY:
1056 case ZPCI_FS_RESERVED:
1057 s390_pci_perform_unplug(pbdev);
1058 break;
1059 default:
1060
1061
1062
1063
1064
1065 pbdev->unplug_requested = true;
1066 s390_pci_generate_plug_event(HP_EVENT_DECONFIGURE_REQUEST,
1067 pbdev->fh, pbdev->fid);
1068 }
1069 } else {
1070 g_assert_not_reached();
1071 }
1072}
1073
1074static void s390_pci_enumerate_bridge(PCIBus *bus, PCIDevice *pdev,
1075 void *opaque)
1076{
1077 S390pciState *s = opaque;
1078 PCIBus *sec_bus = NULL;
1079
1080 if ((pci_default_read_config(pdev, PCI_HEADER_TYPE, 1) !=
1081 PCI_HEADER_TYPE_BRIDGE)) {
1082 return;
1083 }
1084
1085 (s->bus_no)++;
1086 pci_default_write_config(pdev, PCI_PRIMARY_BUS, pci_dev_bus_num(pdev), 1);
1087 pci_default_write_config(pdev, PCI_SECONDARY_BUS, s->bus_no, 1);
1088 pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, s->bus_no, 1);
1089
1090 sec_bus = pci_bridge_get_sec_bus(PCI_BRIDGE(pdev));
1091 if (!sec_bus) {
1092 return;
1093 }
1094
1095
1096 pci_for_each_device(sec_bus, pci_bus_num(sec_bus),
1097 s390_pci_enumerate_bridge, s);
1098 pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, s->bus_no, 1);
1099}
1100
1101static void s390_pcihost_reset(DeviceState *dev)
1102{
1103 S390pciState *s = S390_PCI_HOST_BRIDGE(dev);
1104 PCIBus *bus = s->parent_obj.bus;
1105 S390PCIBusDevice *pbdev, *next;
1106
1107
1108 QTAILQ_FOREACH_SAFE(pbdev, &s->zpci_devs, link, next) {
1109 if (pbdev->unplug_requested) {
1110 if (pbdev->summary_ind) {
1111 pci_dereg_irqs(pbdev);
1112 }
1113 if (pbdev->iommu->enabled) {
1114 pci_dereg_ioat(pbdev->iommu);
1115 }
1116 pbdev->state = ZPCI_FS_STANDBY;
1117 s390_pci_perform_unplug(pbdev);
1118 }
1119 }
1120
1121
1122
1123
1124
1125 s->bus_no = 0;
1126 pci_for_each_device(bus, pci_bus_num(bus), s390_pci_enumerate_bridge, s);
1127}
1128
1129static void s390_pcihost_class_init(ObjectClass *klass, void *data)
1130{
1131 DeviceClass *dc = DEVICE_CLASS(klass);
1132 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
1133
1134 dc->reset = s390_pcihost_reset;
1135 dc->realize = s390_pcihost_realize;
1136 hc->pre_plug = s390_pcihost_pre_plug;
1137 hc->plug = s390_pcihost_plug;
1138 hc->unplug_request = s390_pcihost_unplug_request;
1139 hc->unplug = s390_pcihost_unplug;
1140 msi_nonbroken = true;
1141}
1142
1143static const TypeInfo s390_pcihost_info = {
1144 .name = TYPE_S390_PCI_HOST_BRIDGE,
1145 .parent = TYPE_PCI_HOST_BRIDGE,
1146 .instance_size = sizeof(S390pciState),
1147 .class_init = s390_pcihost_class_init,
1148 .interfaces = (InterfaceInfo[]) {
1149 { TYPE_HOTPLUG_HANDLER },
1150 { }
1151 }
1152};
1153
1154static const TypeInfo s390_pcibus_info = {
1155 .name = TYPE_S390_PCI_BUS,
1156 .parent = TYPE_BUS,
1157 .instance_size = sizeof(S390PCIBus),
1158};
1159
1160static uint16_t s390_pci_generate_uid(S390pciState *s)
1161{
1162 uint16_t uid = 0;
1163
1164 do {
1165 uid++;
1166 if (!s390_pci_find_dev_by_uid(s, uid)) {
1167 return uid;
1168 }
1169 } while (uid < ZPCI_MAX_UID);
1170
1171 return UID_UNDEFINED;
1172}
1173
1174static uint32_t s390_pci_generate_fid(S390pciState *s, Error **errp)
1175{
1176 uint32_t fid = 0;
1177
1178 do {
1179 if (!s390_pci_find_dev_by_fid(s, fid)) {
1180 return fid;
1181 }
1182 } while (fid++ != ZPCI_MAX_FID);
1183
1184 error_setg(errp, "no free fid could be found");
1185 return 0;
1186}
1187
1188static void s390_pci_device_realize(DeviceState *dev, Error **errp)
1189{
1190 S390PCIBusDevice *zpci = S390_PCI_DEVICE(dev);
1191 S390pciState *s = s390_get_phb();
1192
1193 if (!zpci->target) {
1194 error_setg(errp, "target must be defined");
1195 return;
1196 }
1197
1198 if (s390_pci_find_dev_by_target(s, zpci->target)) {
1199 error_setg(errp, "target %s already has an associated zpci device",
1200 zpci->target);
1201 return;
1202 }
1203
1204 if (zpci->uid == UID_UNDEFINED) {
1205 zpci->uid = s390_pci_generate_uid(s);
1206 if (!zpci->uid) {
1207 error_setg(errp, "no free uid could be found");
1208 return;
1209 }
1210 } else if (s390_pci_find_dev_by_uid(s, zpci->uid)) {
1211 error_setg(errp, "uid %u already in use", zpci->uid);
1212 return;
1213 }
1214
1215 if (!zpci->fid_defined) {
1216 Error *local_error = NULL;
1217
1218 zpci->fid = s390_pci_generate_fid(s, &local_error);
1219 if (local_error) {
1220 error_propagate(errp, local_error);
1221 return;
1222 }
1223 } else if (s390_pci_find_dev_by_fid(s, zpci->fid)) {
1224 error_setg(errp, "fid %u already in use", zpci->fid);
1225 return;
1226 }
1227
1228 zpci->state = ZPCI_FS_RESERVED;
1229 zpci->fmb.format = ZPCI_FMB_FORMAT;
1230}
1231
1232static void s390_pci_device_reset(DeviceState *dev)
1233{
1234 S390PCIBusDevice *pbdev = S390_PCI_DEVICE(dev);
1235
1236 switch (pbdev->state) {
1237 case ZPCI_FS_RESERVED:
1238 return;
1239 case ZPCI_FS_STANDBY:
1240 break;
1241 default:
1242 pbdev->fh &= ~FH_MASK_ENABLE;
1243 pbdev->state = ZPCI_FS_DISABLED;
1244 break;
1245 }
1246
1247 if (pbdev->summary_ind) {
1248 pci_dereg_irqs(pbdev);
1249 }
1250 if (pbdev->iommu->enabled) {
1251 pci_dereg_ioat(pbdev->iommu);
1252 }
1253
1254 fmb_timer_free(pbdev);
1255}
1256
1257static void s390_pci_get_fid(Object *obj, Visitor *v, const char *name,
1258 void *opaque, Error **errp)
1259{
1260 Property *prop = opaque;
1261 uint32_t *ptr = qdev_get_prop_ptr(DEVICE(obj), prop);
1262
1263 visit_type_uint32(v, name, ptr, errp);
1264}
1265
1266static void s390_pci_set_fid(Object *obj, Visitor *v, const char *name,
1267 void *opaque, Error **errp)
1268{
1269 DeviceState *dev = DEVICE(obj);
1270 S390PCIBusDevice *zpci = S390_PCI_DEVICE(obj);
1271 Property *prop = opaque;
1272 uint32_t *ptr = qdev_get_prop_ptr(dev, prop);
1273
1274 if (dev->realized) {
1275 qdev_prop_set_after_realize(dev, name, errp);
1276 return;
1277 }
1278
1279 visit_type_uint32(v, name, ptr, errp);
1280 zpci->fid_defined = true;
1281}
1282
1283static const PropertyInfo s390_pci_fid_propinfo = {
1284 .name = "zpci_fid",
1285 .get = s390_pci_get_fid,
1286 .set = s390_pci_set_fid,
1287};
1288
1289#define DEFINE_PROP_S390_PCI_FID(_n, _s, _f) \
1290 DEFINE_PROP(_n, _s, _f, s390_pci_fid_propinfo, uint32_t)
1291
1292static Property s390_pci_device_properties[] = {
1293 DEFINE_PROP_UINT16("uid", S390PCIBusDevice, uid, UID_UNDEFINED),
1294 DEFINE_PROP_S390_PCI_FID("fid", S390PCIBusDevice, fid),
1295 DEFINE_PROP_STRING("target", S390PCIBusDevice, target),
1296 DEFINE_PROP_END_OF_LIST(),
1297};
1298
1299static const VMStateDescription s390_pci_device_vmstate = {
1300 .name = TYPE_S390_PCI_DEVICE,
1301
1302
1303
1304
1305 .unmigratable = 1,
1306};
1307
1308static void s390_pci_device_class_init(ObjectClass *klass, void *data)
1309{
1310 DeviceClass *dc = DEVICE_CLASS(klass);
1311
1312 dc->desc = "zpci device";
1313 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
1314 dc->reset = s390_pci_device_reset;
1315 dc->bus_type = TYPE_S390_PCI_BUS;
1316 dc->realize = s390_pci_device_realize;
1317 dc->props = s390_pci_device_properties;
1318 dc->vmsd = &s390_pci_device_vmstate;
1319}
1320
1321static const TypeInfo s390_pci_device_info = {
1322 .name = TYPE_S390_PCI_DEVICE,
1323 .parent = TYPE_DEVICE,
1324 .instance_size = sizeof(S390PCIBusDevice),
1325 .class_init = s390_pci_device_class_init,
1326};
1327
1328static TypeInfo s390_pci_iommu_info = {
1329 .name = TYPE_S390_PCI_IOMMU,
1330 .parent = TYPE_OBJECT,
1331 .instance_size = sizeof(S390PCIIOMMU),
1332};
1333
1334static void s390_iommu_memory_region_class_init(ObjectClass *klass, void *data)
1335{
1336 IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
1337
1338 imrc->translate = s390_translate_iommu;
1339 imrc->replay = s390_pci_iommu_replay;
1340}
1341
1342static const TypeInfo s390_iommu_memory_region_info = {
1343 .parent = TYPE_IOMMU_MEMORY_REGION,
1344 .name = TYPE_S390_IOMMU_MEMORY_REGION,
1345 .class_init = s390_iommu_memory_region_class_init,
1346};
1347
1348static void s390_pci_register_types(void)
1349{
1350 type_register_static(&s390_pcihost_info);
1351 type_register_static(&s390_pcibus_info);
1352 type_register_static(&s390_pci_device_info);
1353 type_register_static(&s390_pci_iommu_info);
1354 type_register_static(&s390_iommu_memory_region_info);
1355}
1356
1357type_init(s390_pci_register_types)
1358
