2 * Support PCI/PCIe on PowerNV platforms
4 * Copyright 2011 Benjamin Herrenschmidt, IBM Corp.
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
14 #include <linux/kernel.h>
15 #include <linux/pci.h>
16 #include <linux/crash_dump.h>
17 #include <linux/debugfs.h>
18 #include <linux/delay.h>
19 #include <linux/string.h>
20 #include <linux/init.h>
21 #include <linux/bootmem.h>
22 #include <linux/irq.h>
24 #include <linux/msi.h>
25 #include <linux/memblock.h>
26 #include <linux/iommu.h>
27 #include <linux/rculist.h>
28 #include <linux/sizes.h>
30 #include <asm/sections.h>
33 #include <asm/pci-bridge.h>
34 #include <asm/machdep.h>
35 #include <asm/msi_bitmap.h>
36 #include <asm/ppc-pci.h>
38 #include <asm/iommu.h>
41 #include <asm/debug.h>
42 #include <asm/firmware.h>
43 #include <asm/pnv-pci.h>
44 #include <asm/mmzone.h>
46 #include <misc/cxl-base.h>
51 #define PNV_IODA1_M64_NUM 16 /* Number of M64 BARs */
52 #define PNV_IODA1_M64_SEGS 8 /* Segments per M64 BAR */
53 #define PNV_IODA1_DMA32_SEGSIZE 0x10000000
55 #define POWERNV_IOMMU_DEFAULT_LEVELS 1
56 #define POWERNV_IOMMU_MAX_LEVELS 5
58 static const char * const pnv_phb_names[] = { "IODA1", "IODA2", "NPU" };
59 static void pnv_pci_ioda2_table_free_pages(struct iommu_table *tbl);
61 void pe_level_printk(const struct pnv_ioda_pe *pe, const char *level,
73 if (pe->flags & PNV_IODA_PE_DEV)
74 strlcpy(pfix, dev_name(&pe->pdev->dev), sizeof(pfix));
75 else if (pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL))
76 sprintf(pfix, "%04x:%02x ",
77 pci_domain_nr(pe->pbus), pe->pbus->number);
79 else if (pe->flags & PNV_IODA_PE_VF)
80 sprintf(pfix, "%04x:%02x:%2x.%d",
81 pci_domain_nr(pe->parent_dev->bus),
82 (pe->rid & 0xff00) >> 8,
83 PCI_SLOT(pe->rid), PCI_FUNC(pe->rid));
84 #endif /* CONFIG_PCI_IOV*/
86 printk("%spci %s: [PE# %.3d] %pV",
87 level, pfix, pe->pe_number, &vaf);
92 static bool pnv_iommu_bypass_disabled __read_mostly;
94 static int __init iommu_setup(char *str)
100 if (!strncmp(str, "nobypass", 8)) {
101 pnv_iommu_bypass_disabled = true;
102 pr_info("PowerNV: IOMMU bypass window disabled.\n");
105 str += strcspn(str, ",");
112 early_param("iommu", iommu_setup);
114 static inline bool pnv_pci_is_mem_pref_64(unsigned long flags)
116 return ((flags & (IORESOURCE_MEM_64 | IORESOURCE_PREFETCH)) ==
117 (IORESOURCE_MEM_64 | IORESOURCE_PREFETCH));
120 static struct pnv_ioda_pe *pnv_ioda_init_pe(struct pnv_phb *phb, int pe_no)
122 phb->ioda.pe_array[pe_no].phb = phb;
123 phb->ioda.pe_array[pe_no].pe_number = pe_no;
125 return &phb->ioda.pe_array[pe_no];
128 static void pnv_ioda_reserve_pe(struct pnv_phb *phb, int pe_no)
130 if (!(pe_no >= 0 && pe_no < phb->ioda.total_pe_num)) {
131 pr_warn("%s: Invalid PE %d on PHB#%x\n",
132 __func__, pe_no, phb->hose->global_number);
136 if (test_and_set_bit(pe_no, phb->ioda.pe_alloc))
137 pr_debug("%s: PE %d was reserved on PHB#%x\n",
138 __func__, pe_no, phb->hose->global_number);
140 pnv_ioda_init_pe(phb, pe_no);
143 static struct pnv_ioda_pe *pnv_ioda_alloc_pe(struct pnv_phb *phb)
145 unsigned long pe = phb->ioda.total_pe_num - 1;
147 for (pe = phb->ioda.total_pe_num - 1; pe >= 0; pe--) {
148 if (!test_and_set_bit(pe, phb->ioda.pe_alloc))
149 return pnv_ioda_init_pe(phb, pe);
155 static void pnv_ioda_free_pe(struct pnv_ioda_pe *pe)
157 struct pnv_phb *phb = pe->phb;
161 memset(pe, 0, sizeof(struct pnv_ioda_pe));
162 clear_bit(pe->pe_number, phb->ioda.pe_alloc);
165 /* The default M64 BAR is shared by all PEs */
166 static int pnv_ioda2_init_m64(struct pnv_phb *phb)
172 /* Configure the default M64 BAR */
173 rc = opal_pci_set_phb_mem_window(phb->opal_id,
174 OPAL_M64_WINDOW_TYPE,
175 phb->ioda.m64_bar_idx,
179 if (rc != OPAL_SUCCESS) {
180 desc = "configuring";
184 /* Enable the default M64 BAR */
185 rc = opal_pci_phb_mmio_enable(phb->opal_id,
186 OPAL_M64_WINDOW_TYPE,
187 phb->ioda.m64_bar_idx,
188 OPAL_ENABLE_M64_SPLIT);
189 if (rc != OPAL_SUCCESS) {
194 /* Mark the M64 BAR assigned */
195 set_bit(phb->ioda.m64_bar_idx, &phb->ioda.m64_bar_alloc);
198 * Exclude the segments for reserved and root bus PE, which
199 * are first or last two PEs.
201 r = &phb->hose->mem_resources[1];
202 if (phb->ioda.reserved_pe_idx == 0)
203 r->start += (2 * phb->ioda.m64_segsize);
204 else if (phb->ioda.reserved_pe_idx == (phb->ioda.total_pe_num - 1))
205 r->end -= (2 * phb->ioda.m64_segsize);
207 pr_warn(" Cannot strip M64 segment for reserved PE#%d\n",
208 phb->ioda.reserved_pe_idx);
213 pr_warn(" Failure %lld %s M64 BAR#%d\n",
214 rc, desc, phb->ioda.m64_bar_idx);
215 opal_pci_phb_mmio_enable(phb->opal_id,
216 OPAL_M64_WINDOW_TYPE,
217 phb->ioda.m64_bar_idx,
222 static void pnv_ioda_reserve_dev_m64_pe(struct pci_dev *pdev,
223 unsigned long *pe_bitmap)
225 struct pci_controller *hose = pci_bus_to_host(pdev->bus);
226 struct pnv_phb *phb = hose->private_data;
228 resource_size_t base, sgsz, start, end;
231 base = phb->ioda.m64_base;
232 sgsz = phb->ioda.m64_segsize;
233 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
234 r = &pdev->resource[i];
235 if (!r->parent || !pnv_pci_is_mem_pref_64(r->flags))
238 start = _ALIGN_DOWN(r->start - base, sgsz);
239 end = _ALIGN_UP(r->end - base, sgsz);
240 for (segno = start / sgsz; segno < end / sgsz; segno++) {
242 set_bit(segno, pe_bitmap);
244 pnv_ioda_reserve_pe(phb, segno);
249 static int pnv_ioda1_init_m64(struct pnv_phb *phb)
255 * There are 16 M64 BARs, each of which has 8 segments. So
256 * there are as many M64 segments as the maximum number of
259 for (index = 0; index < PNV_IODA1_M64_NUM; index++) {
260 unsigned long base, segsz = phb->ioda.m64_segsize;
263 base = phb->ioda.m64_base +
264 index * PNV_IODA1_M64_SEGS * segsz;
265 rc = opal_pci_set_phb_mem_window(phb->opal_id,
266 OPAL_M64_WINDOW_TYPE, index, base, 0,
267 PNV_IODA1_M64_SEGS * segsz);
268 if (rc != OPAL_SUCCESS) {
269 pr_warn(" Error %lld setting M64 PHB#%d-BAR#%d\n",
270 rc, phb->hose->global_number, index);
274 rc = opal_pci_phb_mmio_enable(phb->opal_id,
275 OPAL_M64_WINDOW_TYPE, index,
276 OPAL_ENABLE_M64_SPLIT);
277 if (rc != OPAL_SUCCESS) {
278 pr_warn(" Error %lld enabling M64 PHB#%d-BAR#%d\n",
279 rc, phb->hose->global_number, index);
285 * Exclude the segments for reserved and root bus PE, which
286 * are first or last two PEs.
288 r = &phb->hose->mem_resources[1];
289 if (phb->ioda.reserved_pe_idx == 0)
290 r->start += (2 * phb->ioda.m64_segsize);
291 else if (phb->ioda.reserved_pe_idx == (phb->ioda.total_pe_num - 1))
292 r->end -= (2 * phb->ioda.m64_segsize);
294 WARN(1, "Wrong reserved PE#%d on PHB#%d\n",
295 phb->ioda.reserved_pe_idx, phb->hose->global_number);
300 for ( ; index >= 0; index--)
301 opal_pci_phb_mmio_enable(phb->opal_id,
302 OPAL_M64_WINDOW_TYPE, index, OPAL_DISABLE_M64);
307 static void pnv_ioda_reserve_m64_pe(struct pci_bus *bus,
308 unsigned long *pe_bitmap,
311 struct pci_dev *pdev;
313 list_for_each_entry(pdev, &bus->devices, bus_list) {
314 pnv_ioda_reserve_dev_m64_pe(pdev, pe_bitmap);
316 if (all && pdev->subordinate)
317 pnv_ioda_reserve_m64_pe(pdev->subordinate,
322 static struct pnv_ioda_pe *pnv_ioda_pick_m64_pe(struct pci_bus *bus, bool all)
324 struct pci_controller *hose = pci_bus_to_host(bus);
325 struct pnv_phb *phb = hose->private_data;
326 struct pnv_ioda_pe *master_pe, *pe;
327 unsigned long size, *pe_alloc;
330 /* Root bus shouldn't use M64 */
331 if (pci_is_root_bus(bus))
334 /* Allocate bitmap */
335 size = _ALIGN_UP(phb->ioda.total_pe_num / 8, sizeof(unsigned long));
336 pe_alloc = kzalloc(size, GFP_KERNEL);
338 pr_warn("%s: Out of memory !\n",
343 /* Figure out reserved PE numbers by the PE */
344 pnv_ioda_reserve_m64_pe(bus, pe_alloc, all);
347 * the current bus might not own M64 window and that's all
348 * contributed by its child buses. For the case, we needn't
349 * pick M64 dependent PE#.
351 if (bitmap_empty(pe_alloc, phb->ioda.total_pe_num)) {
357 * Figure out the master PE and put all slave PEs to master
358 * PE's list to form compound PE.
362 while ((i = find_next_bit(pe_alloc, phb->ioda.total_pe_num, i + 1)) <
363 phb->ioda.total_pe_num) {
364 pe = &phb->ioda.pe_array[i];
366 phb->ioda.m64_segmap[pe->pe_number] = pe->pe_number;
368 pe->flags |= PNV_IODA_PE_MASTER;
369 INIT_LIST_HEAD(&pe->slaves);
372 pe->flags |= PNV_IODA_PE_SLAVE;
373 pe->master = master_pe;
374 list_add_tail(&pe->list, &master_pe->slaves);
378 * P7IOC supports M64DT, which helps mapping M64 segment
379 * to one particular PE#. However, PHB3 has fixed mapping
380 * between M64 segment and PE#. In order to have same logic
381 * for P7IOC and PHB3, we enforce fixed mapping between M64
382 * segment and PE# on P7IOC.
384 if (phb->type == PNV_PHB_IODA1) {
387 rc = opal_pci_map_pe_mmio_window(phb->opal_id,
388 pe->pe_number, OPAL_M64_WINDOW_TYPE,
389 pe->pe_number / PNV_IODA1_M64_SEGS,
390 pe->pe_number % PNV_IODA1_M64_SEGS);
391 if (rc != OPAL_SUCCESS)
392 pr_warn("%s: Error %lld mapping M64 for PHB#%d-PE#%d\n",
393 __func__, rc, phb->hose->global_number,
402 static void __init pnv_ioda_parse_m64_window(struct pnv_phb *phb)
404 struct pci_controller *hose = phb->hose;
405 struct device_node *dn = hose->dn;
406 struct resource *res;
410 if (phb->type != PNV_PHB_IODA1 && phb->type != PNV_PHB_IODA2) {
411 pr_info(" Not support M64 window\n");
415 if (!firmware_has_feature(FW_FEATURE_OPAL)) {
416 pr_info(" Firmware too old to support M64 window\n");
420 r = of_get_property(dn, "ibm,opal-m64-window", NULL);
422 pr_info(" No <ibm,opal-m64-window> on %s\n",
427 res = &hose->mem_resources[1];
428 res->name = dn->full_name;
429 res->start = of_translate_address(dn, r + 2);
430 res->end = res->start + of_read_number(r + 4, 2) - 1;
431 res->flags = (IORESOURCE_MEM | IORESOURCE_MEM_64 | IORESOURCE_PREFETCH);
432 pci_addr = of_read_number(r, 2);
433 hose->mem_offset[1] = res->start - pci_addr;
435 phb->ioda.m64_size = resource_size(res);
436 phb->ioda.m64_segsize = phb->ioda.m64_size / phb->ioda.total_pe_num;
437 phb->ioda.m64_base = pci_addr;
439 pr_info(" MEM64 0x%016llx..0x%016llx -> 0x%016llx\n",
440 res->start, res->end, pci_addr);
442 /* Use last M64 BAR to cover M64 window */
443 phb->ioda.m64_bar_idx = 15;
444 if (phb->type == PNV_PHB_IODA1)
445 phb->init_m64 = pnv_ioda1_init_m64;
447 phb->init_m64 = pnv_ioda2_init_m64;
448 phb->reserve_m64_pe = pnv_ioda_reserve_m64_pe;
449 phb->pick_m64_pe = pnv_ioda_pick_m64_pe;
452 static void pnv_ioda_freeze_pe(struct pnv_phb *phb, int pe_no)
454 struct pnv_ioda_pe *pe = &phb->ioda.pe_array[pe_no];
455 struct pnv_ioda_pe *slave;
458 /* Fetch master PE */
459 if (pe->flags & PNV_IODA_PE_SLAVE) {
461 if (WARN_ON(!pe || !(pe->flags & PNV_IODA_PE_MASTER)))
464 pe_no = pe->pe_number;
467 /* Freeze master PE */
468 rc = opal_pci_eeh_freeze_set(phb->opal_id,
470 OPAL_EEH_ACTION_SET_FREEZE_ALL);
471 if (rc != OPAL_SUCCESS) {
472 pr_warn("%s: Failure %lld freezing PHB#%x-PE#%x\n",
473 __func__, rc, phb->hose->global_number, pe_no);
477 /* Freeze slave PEs */
478 if (!(pe->flags & PNV_IODA_PE_MASTER))
481 list_for_each_entry(slave, &pe->slaves, list) {
482 rc = opal_pci_eeh_freeze_set(phb->opal_id,
484 OPAL_EEH_ACTION_SET_FREEZE_ALL);
485 if (rc != OPAL_SUCCESS)
486 pr_warn("%s: Failure %lld freezing PHB#%x-PE#%x\n",
487 __func__, rc, phb->hose->global_number,
492 static int pnv_ioda_unfreeze_pe(struct pnv_phb *phb, int pe_no, int opt)
494 struct pnv_ioda_pe *pe, *slave;
498 pe = &phb->ioda.pe_array[pe_no];
499 if (pe->flags & PNV_IODA_PE_SLAVE) {
501 WARN_ON(!pe || !(pe->flags & PNV_IODA_PE_MASTER));
502 pe_no = pe->pe_number;
505 /* Clear frozen state for master PE */
506 rc = opal_pci_eeh_freeze_clear(phb->opal_id, pe_no, opt);
507 if (rc != OPAL_SUCCESS) {
508 pr_warn("%s: Failure %lld clear %d on PHB#%x-PE#%x\n",
509 __func__, rc, opt, phb->hose->global_number, pe_no);
513 if (!(pe->flags & PNV_IODA_PE_MASTER))
516 /* Clear frozen state for slave PEs */
517 list_for_each_entry(slave, &pe->slaves, list) {
518 rc = opal_pci_eeh_freeze_clear(phb->opal_id,
521 if (rc != OPAL_SUCCESS) {
522 pr_warn("%s: Failure %lld clear %d on PHB#%x-PE#%x\n",
523 __func__, rc, opt, phb->hose->global_number,
532 static int pnv_ioda_get_pe_state(struct pnv_phb *phb, int pe_no)
534 struct pnv_ioda_pe *slave, *pe;
539 /* Sanity check on PE number */
540 if (pe_no < 0 || pe_no >= phb->ioda.total_pe_num)
541 return OPAL_EEH_STOPPED_PERM_UNAVAIL;
544 * Fetch the master PE and the PE instance might be
545 * not initialized yet.
547 pe = &phb->ioda.pe_array[pe_no];
548 if (pe->flags & PNV_IODA_PE_SLAVE) {
550 WARN_ON(!pe || !(pe->flags & PNV_IODA_PE_MASTER));
551 pe_no = pe->pe_number;
554 /* Check the master PE */
555 rc = opal_pci_eeh_freeze_status(phb->opal_id, pe_no,
556 &state, &pcierr, NULL);
557 if (rc != OPAL_SUCCESS) {
558 pr_warn("%s: Failure %lld getting "
559 "PHB#%x-PE#%x state\n",
561 phb->hose->global_number, pe_no);
562 return OPAL_EEH_STOPPED_TEMP_UNAVAIL;
565 /* Check the slave PE */
566 if (!(pe->flags & PNV_IODA_PE_MASTER))
569 list_for_each_entry(slave, &pe->slaves, list) {
570 rc = opal_pci_eeh_freeze_status(phb->opal_id,
575 if (rc != OPAL_SUCCESS) {
576 pr_warn("%s: Failure %lld getting "
577 "PHB#%x-PE#%x state\n",
579 phb->hose->global_number, slave->pe_number);
580 return OPAL_EEH_STOPPED_TEMP_UNAVAIL;
584 * Override the result based on the ascending
594 /* Currently those 2 are only used when MSIs are enabled, this will change
595 * but in the meantime, we need to protect them to avoid warnings
597 #ifdef CONFIG_PCI_MSI
598 struct pnv_ioda_pe *pnv_ioda_get_pe(struct pci_dev *dev)
600 struct pci_controller *hose = pci_bus_to_host(dev->bus);
601 struct pnv_phb *phb = hose->private_data;
602 struct pci_dn *pdn = pci_get_pdn(dev);
606 if (pdn->pe_number == IODA_INVALID_PE)
608 return &phb->ioda.pe_array[pdn->pe_number];
610 #endif /* CONFIG_PCI_MSI */
612 static int pnv_ioda_set_one_peltv(struct pnv_phb *phb,
613 struct pnv_ioda_pe *parent,
614 struct pnv_ioda_pe *child,
617 const char *desc = is_add ? "adding" : "removing";
618 uint8_t op = is_add ? OPAL_ADD_PE_TO_DOMAIN :
619 OPAL_REMOVE_PE_FROM_DOMAIN;
620 struct pnv_ioda_pe *slave;
623 /* Parent PE affects child PE */
624 rc = opal_pci_set_peltv(phb->opal_id, parent->pe_number,
625 child->pe_number, op);
626 if (rc != OPAL_SUCCESS) {
627 pe_warn(child, "OPAL error %ld %s to parent PELTV\n",
632 if (!(child->flags & PNV_IODA_PE_MASTER))
635 /* Compound case: parent PE affects slave PEs */
636 list_for_each_entry(slave, &child->slaves, list) {
637 rc = opal_pci_set_peltv(phb->opal_id, parent->pe_number,
638 slave->pe_number, op);
639 if (rc != OPAL_SUCCESS) {
640 pe_warn(slave, "OPAL error %ld %s to parent PELTV\n",
649 static int pnv_ioda_set_peltv(struct pnv_phb *phb,
650 struct pnv_ioda_pe *pe,
653 struct pnv_ioda_pe *slave;
654 struct pci_dev *pdev = NULL;
658 * Clear PE frozen state. If it's master PE, we need
659 * clear slave PE frozen state as well.
662 opal_pci_eeh_freeze_clear(phb->opal_id, pe->pe_number,
663 OPAL_EEH_ACTION_CLEAR_FREEZE_ALL);
664 if (pe->flags & PNV_IODA_PE_MASTER) {
665 list_for_each_entry(slave, &pe->slaves, list)
666 opal_pci_eeh_freeze_clear(phb->opal_id,
668 OPAL_EEH_ACTION_CLEAR_FREEZE_ALL);
673 * Associate PE in PELT. We need add the PE into the
674 * corresponding PELT-V as well. Otherwise, the error
675 * originated from the PE might contribute to other
678 ret = pnv_ioda_set_one_peltv(phb, pe, pe, is_add);
682 /* For compound PEs, any one affects all of them */
683 if (pe->flags & PNV_IODA_PE_MASTER) {
684 list_for_each_entry(slave, &pe->slaves, list) {
685 ret = pnv_ioda_set_one_peltv(phb, slave, pe, is_add);
691 if (pe->flags & (PNV_IODA_PE_BUS_ALL | PNV_IODA_PE_BUS))
692 pdev = pe->pbus->self;
693 else if (pe->flags & PNV_IODA_PE_DEV)
694 pdev = pe->pdev->bus->self;
695 #ifdef CONFIG_PCI_IOV
696 else if (pe->flags & PNV_IODA_PE_VF)
697 pdev = pe->parent_dev;
698 #endif /* CONFIG_PCI_IOV */
700 struct pci_dn *pdn = pci_get_pdn(pdev);
701 struct pnv_ioda_pe *parent;
703 if (pdn && pdn->pe_number != IODA_INVALID_PE) {
704 parent = &phb->ioda.pe_array[pdn->pe_number];
705 ret = pnv_ioda_set_one_peltv(phb, parent, pe, is_add);
710 pdev = pdev->bus->self;
716 static int pnv_ioda_deconfigure_pe(struct pnv_phb *phb, struct pnv_ioda_pe *pe)
718 struct pci_dev *parent;
719 uint8_t bcomp, dcomp, fcomp;
723 /* Currently, we just deconfigure VF PE. Bus PE will always there.*/
727 dcomp = OPAL_IGNORE_RID_DEVICE_NUMBER;
728 fcomp = OPAL_IGNORE_RID_FUNCTION_NUMBER;
729 parent = pe->pbus->self;
730 if (pe->flags & PNV_IODA_PE_BUS_ALL)
731 count = pe->pbus->busn_res.end - pe->pbus->busn_res.start + 1;
736 case 1: bcomp = OpalPciBusAll; break;
737 case 2: bcomp = OpalPciBus7Bits; break;
738 case 4: bcomp = OpalPciBus6Bits; break;
739 case 8: bcomp = OpalPciBus5Bits; break;
740 case 16: bcomp = OpalPciBus4Bits; break;
741 case 32: bcomp = OpalPciBus3Bits; break;
743 dev_err(&pe->pbus->dev, "Number of subordinate buses %d unsupported\n",
745 /* Do an exact match only */
746 bcomp = OpalPciBusAll;
748 rid_end = pe->rid + (count << 8);
750 #ifdef CONFIG_PCI_IOV
751 if (pe->flags & PNV_IODA_PE_VF)
752 parent = pe->parent_dev;
755 parent = pe->pdev->bus->self;
756 bcomp = OpalPciBusAll;
757 dcomp = OPAL_COMPARE_RID_DEVICE_NUMBER;
758 fcomp = OPAL_COMPARE_RID_FUNCTION_NUMBER;
759 rid_end = pe->rid + 1;
762 /* Clear the reverse map */
763 for (rid = pe->rid; rid < rid_end; rid++)
764 phb->ioda.pe_rmap[rid] = IODA_INVALID_PE;
766 /* Release from all parents PELT-V */
768 struct pci_dn *pdn = pci_get_pdn(parent);
769 if (pdn && pdn->pe_number != IODA_INVALID_PE) {
770 rc = opal_pci_set_peltv(phb->opal_id, pdn->pe_number,
771 pe->pe_number, OPAL_REMOVE_PE_FROM_DOMAIN);
772 /* XXX What to do in case of error ? */
774 parent = parent->bus->self;
777 opal_pci_eeh_freeze_clear(phb->opal_id, pe->pe_number,
778 OPAL_EEH_ACTION_CLEAR_FREEZE_ALL);
780 /* Disassociate PE in PELT */
781 rc = opal_pci_set_peltv(phb->opal_id, pe->pe_number,
782 pe->pe_number, OPAL_REMOVE_PE_FROM_DOMAIN);
784 pe_warn(pe, "OPAL error %ld remove self from PELTV\n", rc);
785 rc = opal_pci_set_pe(phb->opal_id, pe->pe_number, pe->rid,
786 bcomp, dcomp, fcomp, OPAL_UNMAP_PE);
788 pe_err(pe, "OPAL error %ld trying to setup PELT table\n", rc);
792 #ifdef CONFIG_PCI_IOV
793 pe->parent_dev = NULL;
799 static int pnv_ioda_configure_pe(struct pnv_phb *phb, struct pnv_ioda_pe *pe)
801 struct pci_dev *parent;
802 uint8_t bcomp, dcomp, fcomp;
803 long rc, rid_end, rid;
805 /* Bus validation ? */
809 dcomp = OPAL_IGNORE_RID_DEVICE_NUMBER;
810 fcomp = OPAL_IGNORE_RID_FUNCTION_NUMBER;
811 parent = pe->pbus->self;
812 if (pe->flags & PNV_IODA_PE_BUS_ALL)
813 count = pe->pbus->busn_res.end - pe->pbus->busn_res.start + 1;
818 case 1: bcomp = OpalPciBusAll; break;
819 case 2: bcomp = OpalPciBus7Bits; break;
820 case 4: bcomp = OpalPciBus6Bits; break;
821 case 8: bcomp = OpalPciBus5Bits; break;
822 case 16: bcomp = OpalPciBus4Bits; break;
823 case 32: bcomp = OpalPciBus3Bits; break;
825 dev_err(&pe->pbus->dev, "Number of subordinate buses %d unsupported\n",
827 /* Do an exact match only */
828 bcomp = OpalPciBusAll;
830 rid_end = pe->rid + (count << 8);
832 #ifdef CONFIG_PCI_IOV
833 if (pe->flags & PNV_IODA_PE_VF)
834 parent = pe->parent_dev;
836 #endif /* CONFIG_PCI_IOV */
837 parent = pe->pdev->bus->self;
838 bcomp = OpalPciBusAll;
839 dcomp = OPAL_COMPARE_RID_DEVICE_NUMBER;
840 fcomp = OPAL_COMPARE_RID_FUNCTION_NUMBER;
841 rid_end = pe->rid + 1;
845 * Associate PE in PELT. We need add the PE into the
846 * corresponding PELT-V as well. Otherwise, the error
847 * originated from the PE might contribute to other
850 rc = opal_pci_set_pe(phb->opal_id, pe->pe_number, pe->rid,
851 bcomp, dcomp, fcomp, OPAL_MAP_PE);
853 pe_err(pe, "OPAL error %ld trying to setup PELT table\n", rc);
858 * Configure PELTV. NPUs don't have a PELTV table so skip
859 * configuration on them.
861 if (phb->type != PNV_PHB_NPU)
862 pnv_ioda_set_peltv(phb, pe, true);
864 /* Setup reverse map */
865 for (rid = pe->rid; rid < rid_end; rid++)
866 phb->ioda.pe_rmap[rid] = pe->pe_number;
868 /* Setup one MVTs on IODA1 */
869 if (phb->type != PNV_PHB_IODA1) {
874 pe->mve_number = pe->pe_number;
875 rc = opal_pci_set_mve(phb->opal_id, pe->mve_number, pe->pe_number);
876 if (rc != OPAL_SUCCESS) {
877 pe_err(pe, "OPAL error %ld setting up MVE %d\n",
881 rc = opal_pci_set_mve_enable(phb->opal_id,
882 pe->mve_number, OPAL_ENABLE_MVE);
884 pe_err(pe, "OPAL error %ld enabling MVE %d\n",
894 #ifdef CONFIG_PCI_IOV
895 static int pnv_pci_vf_resource_shift(struct pci_dev *dev, int offset)
897 struct pci_dn *pdn = pci_get_pdn(dev);
899 struct resource *res, res2;
900 resource_size_t size;
907 * "offset" is in VFs. The M64 windows are sized so that when they
908 * are segmented, each segment is the same size as the IOV BAR.
909 * Each segment is in a separate PE, and the high order bits of the
910 * address are the PE number. Therefore, each VF's BAR is in a
911 * separate PE, and changing the IOV BAR start address changes the
912 * range of PEs the VFs are in.
914 num_vfs = pdn->num_vfs;
915 for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
916 res = &dev->resource[i + PCI_IOV_RESOURCES];
917 if (!res->flags || !res->parent)
921 * The actual IOV BAR range is determined by the start address
922 * and the actual size for num_vfs VFs BAR. This check is to
923 * make sure that after shifting, the range will not overlap
924 * with another device.
926 size = pci_iov_resource_size(dev, i + PCI_IOV_RESOURCES);
927 res2.flags = res->flags;
928 res2.start = res->start + (size * offset);
929 res2.end = res2.start + (size * num_vfs) - 1;
931 if (res2.end > res->end) {
932 dev_err(&dev->dev, "VF BAR%d: %pR would extend past %pR (trying to enable %d VFs shifted by %d)\n",
933 i, &res2, res, num_vfs, offset);
939 * After doing so, there would be a "hole" in the /proc/iomem when
940 * offset is a positive value. It looks like the device return some
941 * mmio back to the system, which actually no one could use it.
943 for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
944 res = &dev->resource[i + PCI_IOV_RESOURCES];
945 if (!res->flags || !res->parent)
948 size = pci_iov_resource_size(dev, i + PCI_IOV_RESOURCES);
950 res->start += size * offset;
952 dev_info(&dev->dev, "VF BAR%d: %pR shifted to %pR (%sabling %d VFs shifted by %d)\n",
953 i, &res2, res, (offset > 0) ? "En" : "Dis",
955 pci_update_resource(dev, i + PCI_IOV_RESOURCES);
959 #endif /* CONFIG_PCI_IOV */
961 static struct pnv_ioda_pe *pnv_ioda_setup_dev_PE(struct pci_dev *dev)
963 struct pci_controller *hose = pci_bus_to_host(dev->bus);
964 struct pnv_phb *phb = hose->private_data;
965 struct pci_dn *pdn = pci_get_pdn(dev);
966 struct pnv_ioda_pe *pe;
969 pr_err("%s: Device tree node not associated properly\n",
973 if (pdn->pe_number != IODA_INVALID_PE)
976 pe = pnv_ioda_alloc_pe(phb);
978 pr_warning("%s: Not enough PE# available, disabling device\n",
983 /* NOTE: We get only one ref to the pci_dev for the pdn, not for the
984 * pointer in the PE data structure, both should be destroyed at the
985 * same time. However, this needs to be looked at more closely again
986 * once we actually start removing things (Hotplug, SR-IOV, ...)
988 * At some point we want to remove the PDN completely anyways
992 pdn->pe_number = pe->pe_number;
993 pe->flags = PNV_IODA_PE_DEV;
997 pe->rid = dev->bus->number << 8 | pdn->devfn;
999 pe_info(pe, "Associated device to PE\n");
1001 if (pnv_ioda_configure_pe(phb, pe)) {
1002 /* XXX What do we do here ? */
1003 pnv_ioda_free_pe(pe);
1004 pdn->pe_number = IODA_INVALID_PE;
1010 /* Put PE to the list */
1011 list_add_tail(&pe->list, &phb->ioda.pe_list);
1016 static void pnv_ioda_setup_same_PE(struct pci_bus *bus, struct pnv_ioda_pe *pe)
1018 struct pci_dev *dev;
1020 list_for_each_entry(dev, &bus->devices, bus_list) {
1021 struct pci_dn *pdn = pci_get_pdn(dev);
1024 pr_warn("%s: No device node associated with device !\n",
1030 * In partial hotplug case, the PCI device might be still
1031 * associated with the PE and needn't attach it to the PE
1034 if (pdn->pe_number != IODA_INVALID_PE)
1039 pdn->pe_number = pe->pe_number;
1040 if ((pe->flags & PNV_IODA_PE_BUS_ALL) && dev->subordinate)
1041 pnv_ioda_setup_same_PE(dev->subordinate, pe);
1046 * There're 2 types of PCI bus sensitive PEs: One that is compromised of
1047 * single PCI bus. Another one that contains the primary PCI bus and its
1048 * subordinate PCI devices and buses. The second type of PE is normally
1049 * orgiriated by PCIe-to-PCI bridge or PLX switch downstream ports.
1051 static struct pnv_ioda_pe *pnv_ioda_setup_bus_PE(struct pci_bus *bus, bool all)
1053 struct pci_controller *hose = pci_bus_to_host(bus);
1054 struct pnv_phb *phb = hose->private_data;
1055 struct pnv_ioda_pe *pe = NULL;
1056 unsigned int pe_num;
1059 * In partial hotplug case, the PE instance might be still alive.
1060 * We should reuse it instead of allocating a new one.
1062 pe_num = phb->ioda.pe_rmap[bus->number << 8];
1063 if (pe_num != IODA_INVALID_PE) {
1064 pe = &phb->ioda.pe_array[pe_num];
1065 pnv_ioda_setup_same_PE(bus, pe);
1069 /* PE number for root bus should have been reserved */
1070 if (pci_is_root_bus(bus) &&
1071 phb->ioda.root_pe_idx != IODA_INVALID_PE)
1072 pe = &phb->ioda.pe_array[phb->ioda.root_pe_idx];
1074 /* Check if PE is determined by M64 */
1075 if (!pe && phb->pick_m64_pe)
1076 pe = phb->pick_m64_pe(bus, all);
1078 /* The PE number isn't pinned by M64 */
1080 pe = pnv_ioda_alloc_pe(phb);
1083 pr_warning("%s: Not enough PE# available for PCI bus %04x:%02x\n",
1084 __func__, pci_domain_nr(bus), bus->number);
1088 pe->flags |= (all ? PNV_IODA_PE_BUS_ALL : PNV_IODA_PE_BUS);
1091 pe->mve_number = -1;
1092 pe->rid = bus->busn_res.start << 8;
1095 pe_info(pe, "Secondary bus %d..%d associated with PE#%d\n",
1096 bus->busn_res.start, bus->busn_res.end, pe->pe_number);
1098 pe_info(pe, "Secondary bus %d associated with PE#%d\n",
1099 bus->busn_res.start, pe->pe_number);
1101 if (pnv_ioda_configure_pe(phb, pe)) {
1102 /* XXX What do we do here ? */
1103 pnv_ioda_free_pe(pe);
1108 /* Associate it with all child devices */
1109 pnv_ioda_setup_same_PE(bus, pe);
1111 /* Put PE to the list */
1112 list_add_tail(&pe->list, &phb->ioda.pe_list);
1117 static struct pnv_ioda_pe *pnv_ioda_setup_npu_PE(struct pci_dev *npu_pdev)
1119 int pe_num, found_pe = false, rc;
1121 struct pnv_ioda_pe *pe;
1122 struct pci_dev *gpu_pdev;
1123 struct pci_dn *npu_pdn;
1124 struct pci_controller *hose = pci_bus_to_host(npu_pdev->bus);
1125 struct pnv_phb *phb = hose->private_data;
1128 * Due to a hardware errata PE#0 on the NPU is reserved for
1129 * error handling. This means we only have three PEs remaining
1130 * which need to be assigned to four links, implying some
1131 * links must share PEs.
1133 * To achieve this we assign PEs such that NPUs linking the
1134 * same GPU get assigned the same PE.
1136 gpu_pdev = pnv_pci_get_gpu_dev(npu_pdev);
1137 for (pe_num = 0; pe_num < phb->ioda.total_pe_num; pe_num++) {
1138 pe = &phb->ioda.pe_array[pe_num];
1142 if (pnv_pci_get_gpu_dev(pe->pdev) == gpu_pdev) {
1144 * This device has the same peer GPU so should
1145 * be assigned the same PE as the existing
1148 dev_info(&npu_pdev->dev,
1149 "Associating to existing PE %d\n", pe_num);
1150 pci_dev_get(npu_pdev);
1151 npu_pdn = pci_get_pdn(npu_pdev);
1152 rid = npu_pdev->bus->number << 8 | npu_pdn->devfn;
1153 npu_pdn->pcidev = npu_pdev;
1154 npu_pdn->pe_number = pe_num;
1155 phb->ioda.pe_rmap[rid] = pe->pe_number;
1157 /* Map the PE to this link */
1158 rc = opal_pci_set_pe(phb->opal_id, pe_num, rid,
1160 OPAL_COMPARE_RID_DEVICE_NUMBER,
1161 OPAL_COMPARE_RID_FUNCTION_NUMBER,
1163 WARN_ON(rc != OPAL_SUCCESS);
1171 * Could not find an existing PE so allocate a new
1174 return pnv_ioda_setup_dev_PE(npu_pdev);
1179 static void pnv_ioda_setup_npu_PEs(struct pci_bus *bus)
1181 struct pci_dev *pdev;
1183 list_for_each_entry(pdev, &bus->devices, bus_list)
1184 pnv_ioda_setup_npu_PE(pdev);
1187 static void pnv_pci_ioda_setup_PEs(void)
1189 struct pci_controller *hose, *tmp;
1190 struct pnv_phb *phb;
1192 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
1193 phb = hose->private_data;
1194 if (phb->type == PNV_PHB_NPU) {
1195 /* PE#0 is needed for error reporting */
1196 pnv_ioda_reserve_pe(phb, 0);
1197 pnv_ioda_setup_npu_PEs(hose->bus);
1202 #ifdef CONFIG_PCI_IOV
1203 static int pnv_pci_vf_release_m64(struct pci_dev *pdev, u16 num_vfs)
1205 struct pci_bus *bus;
1206 struct pci_controller *hose;
1207 struct pnv_phb *phb;
1213 hose = pci_bus_to_host(bus);
1214 phb = hose->private_data;
1215 pdn = pci_get_pdn(pdev);
1217 if (pdn->m64_single_mode)
1222 for (i = 0; i < PCI_SRIOV_NUM_BARS; i++)
1223 for (j = 0; j < m64_bars; j++) {
1224 if (pdn->m64_map[j][i] == IODA_INVALID_M64)
1226 opal_pci_phb_mmio_enable(phb->opal_id,
1227 OPAL_M64_WINDOW_TYPE, pdn->m64_map[j][i], 0);
1228 clear_bit(pdn->m64_map[j][i], &phb->ioda.m64_bar_alloc);
1229 pdn->m64_map[j][i] = IODA_INVALID_M64;
1232 kfree(pdn->m64_map);
1236 static int pnv_pci_vf_assign_m64(struct pci_dev *pdev, u16 num_vfs)
1238 struct pci_bus *bus;
1239 struct pci_controller *hose;
1240 struct pnv_phb *phb;
1243 struct resource *res;
1247 resource_size_t size, start;
1252 hose = pci_bus_to_host(bus);
1253 phb = hose->private_data;
1254 pdn = pci_get_pdn(pdev);
1255 total_vfs = pci_sriov_get_totalvfs(pdev);
1257 if (pdn->m64_single_mode)
1262 pdn->m64_map = kmalloc(sizeof(*pdn->m64_map) * m64_bars, GFP_KERNEL);
1265 /* Initialize the m64_map to IODA_INVALID_M64 */
1266 for (i = 0; i < m64_bars ; i++)
1267 for (j = 0; j < PCI_SRIOV_NUM_BARS; j++)
1268 pdn->m64_map[i][j] = IODA_INVALID_M64;
1271 for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
1272 res = &pdev->resource[i + PCI_IOV_RESOURCES];
1273 if (!res->flags || !res->parent)
1276 for (j = 0; j < m64_bars; j++) {
1278 win = find_next_zero_bit(&phb->ioda.m64_bar_alloc,
1279 phb->ioda.m64_bar_idx + 1, 0);
1281 if (win >= phb->ioda.m64_bar_idx + 1)
1283 } while (test_and_set_bit(win, &phb->ioda.m64_bar_alloc));
1285 pdn->m64_map[j][i] = win;
1287 if (pdn->m64_single_mode) {
1288 size = pci_iov_resource_size(pdev,
1289 PCI_IOV_RESOURCES + i);
1290 start = res->start + size * j;
1292 size = resource_size(res);
1296 /* Map the M64 here */
1297 if (pdn->m64_single_mode) {
1298 pe_num = pdn->pe_num_map[j];
1299 rc = opal_pci_map_pe_mmio_window(phb->opal_id,
1300 pe_num, OPAL_M64_WINDOW_TYPE,
1301 pdn->m64_map[j][i], 0);
1304 rc = opal_pci_set_phb_mem_window(phb->opal_id,
1305 OPAL_M64_WINDOW_TYPE,
1312 if (rc != OPAL_SUCCESS) {
1313 dev_err(&pdev->dev, "Failed to map M64 window #%d: %lld\n",
1318 if (pdn->m64_single_mode)
1319 rc = opal_pci_phb_mmio_enable(phb->opal_id,
1320 OPAL_M64_WINDOW_TYPE, pdn->m64_map[j][i], 2);
1322 rc = opal_pci_phb_mmio_enable(phb->opal_id,
1323 OPAL_M64_WINDOW_TYPE, pdn->m64_map[j][i], 1);
1325 if (rc != OPAL_SUCCESS) {
1326 dev_err(&pdev->dev, "Failed to enable M64 window #%d: %llx\n",
1335 pnv_pci_vf_release_m64(pdev, num_vfs);
1339 static long pnv_pci_ioda2_unset_window(struct iommu_table_group *table_group,
1341 static void pnv_pci_ioda2_set_bypass(struct pnv_ioda_pe *pe, bool enable);
1343 static void pnv_pci_ioda2_release_dma_pe(struct pci_dev *dev, struct pnv_ioda_pe *pe)
1345 struct iommu_table *tbl;
1348 tbl = pe->table_group.tables[0];
1349 rc = pnv_pci_ioda2_unset_window(&pe->table_group, 0);
1351 pe_warn(pe, "OPAL error %ld release DMA window\n", rc);
1353 pnv_pci_ioda2_set_bypass(pe, false);
1354 if (pe->table_group.group) {
1355 iommu_group_put(pe->table_group.group);
1356 BUG_ON(pe->table_group.group);
1358 pnv_pci_ioda2_table_free_pages(tbl);
1359 iommu_free_table(tbl, of_node_full_name(dev->dev.of_node));
1362 static void pnv_ioda_release_vf_PE(struct pci_dev *pdev)
1364 struct pci_bus *bus;
1365 struct pci_controller *hose;
1366 struct pnv_phb *phb;
1367 struct pnv_ioda_pe *pe, *pe_n;
1371 hose = pci_bus_to_host(bus);
1372 phb = hose->private_data;
1373 pdn = pci_get_pdn(pdev);
1375 if (!pdev->is_physfn)
1378 list_for_each_entry_safe(pe, pe_n, &phb->ioda.pe_list, list) {
1379 if (pe->parent_dev != pdev)
1382 pnv_pci_ioda2_release_dma_pe(pdev, pe);
1384 /* Remove from list */
1385 mutex_lock(&phb->ioda.pe_list_mutex);
1386 list_del(&pe->list);
1387 mutex_unlock(&phb->ioda.pe_list_mutex);
1389 pnv_ioda_deconfigure_pe(phb, pe);
1391 pnv_ioda_free_pe(pe);
1395 void pnv_pci_sriov_disable(struct pci_dev *pdev)
1397 struct pci_bus *bus;
1398 struct pci_controller *hose;
1399 struct pnv_phb *phb;
1400 struct pnv_ioda_pe *pe;
1402 struct pci_sriov *iov;
1406 hose = pci_bus_to_host(bus);
1407 phb = hose->private_data;
1408 pdn = pci_get_pdn(pdev);
1410 num_vfs = pdn->num_vfs;
1412 /* Release VF PEs */
1413 pnv_ioda_release_vf_PE(pdev);
1415 if (phb->type == PNV_PHB_IODA2) {
1416 if (!pdn->m64_single_mode)
1417 pnv_pci_vf_resource_shift(pdev, -*pdn->pe_num_map);
1419 /* Release M64 windows */
1420 pnv_pci_vf_release_m64(pdev, num_vfs);
1422 /* Release PE numbers */
1423 if (pdn->m64_single_mode) {
1424 for (i = 0; i < num_vfs; i++) {
1425 if (pdn->pe_num_map[i] == IODA_INVALID_PE)
1428 pe = &phb->ioda.pe_array[pdn->pe_num_map[i]];
1429 pnv_ioda_free_pe(pe);
1432 bitmap_clear(phb->ioda.pe_alloc, *pdn->pe_num_map, num_vfs);
1433 /* Releasing pe_num_map */
1434 kfree(pdn->pe_num_map);
1438 static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb,
1439 struct pnv_ioda_pe *pe);
1440 static void pnv_ioda_setup_vf_PE(struct pci_dev *pdev, u16 num_vfs)
1442 struct pci_bus *bus;
1443 struct pci_controller *hose;
1444 struct pnv_phb *phb;
1445 struct pnv_ioda_pe *pe;
1451 hose = pci_bus_to_host(bus);
1452 phb = hose->private_data;
1453 pdn = pci_get_pdn(pdev);
1455 if (!pdev->is_physfn)
1458 /* Reserve PE for each VF */
1459 for (vf_index = 0; vf_index < num_vfs; vf_index++) {
1460 if (pdn->m64_single_mode)
1461 pe_num = pdn->pe_num_map[vf_index];
1463 pe_num = *pdn->pe_num_map + vf_index;
1465 pe = &phb->ioda.pe_array[pe_num];
1466 pe->pe_number = pe_num;
1468 pe->flags = PNV_IODA_PE_VF;
1470 pe->parent_dev = pdev;
1471 pe->mve_number = -1;
1472 pe->rid = (pci_iov_virtfn_bus(pdev, vf_index) << 8) |
1473 pci_iov_virtfn_devfn(pdev, vf_index);
1475 pe_info(pe, "VF %04d:%02d:%02d.%d associated with PE#%d\n",
1476 hose->global_number, pdev->bus->number,
1477 PCI_SLOT(pci_iov_virtfn_devfn(pdev, vf_index)),
1478 PCI_FUNC(pci_iov_virtfn_devfn(pdev, vf_index)), pe_num);
1480 if (pnv_ioda_configure_pe(phb, pe)) {
1481 /* XXX What do we do here ? */
1482 pnv_ioda_free_pe(pe);
1487 /* Put PE to the list */
1488 mutex_lock(&phb->ioda.pe_list_mutex);
1489 list_add_tail(&pe->list, &phb->ioda.pe_list);
1490 mutex_unlock(&phb->ioda.pe_list_mutex);
1492 pnv_pci_ioda2_setup_dma_pe(phb, pe);
1496 int pnv_pci_sriov_enable(struct pci_dev *pdev, u16 num_vfs)
1498 struct pci_bus *bus;
1499 struct pci_controller *hose;
1500 struct pnv_phb *phb;
1501 struct pnv_ioda_pe *pe;
1507 hose = pci_bus_to_host(bus);
1508 phb = hose->private_data;
1509 pdn = pci_get_pdn(pdev);
1511 if (phb->type == PNV_PHB_IODA2) {
1512 if (!pdn->vfs_expanded) {
1513 dev_info(&pdev->dev, "don't support this SRIOV device"
1514 " with non 64bit-prefetchable IOV BAR\n");
1519 * When M64 BARs functions in Single PE mode, the number of VFs
1520 * could be enabled must be less than the number of M64 BARs.
1522 if (pdn->m64_single_mode && num_vfs > phb->ioda.m64_bar_idx) {
1523 dev_info(&pdev->dev, "Not enough M64 BAR for VFs\n");
1527 /* Allocating pe_num_map */
1528 if (pdn->m64_single_mode)
1529 pdn->pe_num_map = kmalloc(sizeof(*pdn->pe_num_map) * num_vfs,
1532 pdn->pe_num_map = kmalloc(sizeof(*pdn->pe_num_map), GFP_KERNEL);
1534 if (!pdn->pe_num_map)
1537 if (pdn->m64_single_mode)
1538 for (i = 0; i < num_vfs; i++)
1539 pdn->pe_num_map[i] = IODA_INVALID_PE;
1541 /* Calculate available PE for required VFs */
1542 if (pdn->m64_single_mode) {
1543 for (i = 0; i < num_vfs; i++) {
1544 pe = pnv_ioda_alloc_pe(phb);
1550 pdn->pe_num_map[i] = pe->pe_number;
1553 mutex_lock(&phb->ioda.pe_alloc_mutex);
1554 *pdn->pe_num_map = bitmap_find_next_zero_area(
1555 phb->ioda.pe_alloc, phb->ioda.total_pe_num,
1557 if (*pdn->pe_num_map >= phb->ioda.total_pe_num) {
1558 mutex_unlock(&phb->ioda.pe_alloc_mutex);
1559 dev_info(&pdev->dev, "Failed to enable VF%d\n", num_vfs);
1560 kfree(pdn->pe_num_map);
1563 bitmap_set(phb->ioda.pe_alloc, *pdn->pe_num_map, num_vfs);
1564 mutex_unlock(&phb->ioda.pe_alloc_mutex);
1566 pdn->num_vfs = num_vfs;
1568 /* Assign M64 window accordingly */
1569 ret = pnv_pci_vf_assign_m64(pdev, num_vfs);
1571 dev_info(&pdev->dev, "Not enough M64 window resources\n");
1576 * When using one M64 BAR to map one IOV BAR, we need to shift
1577 * the IOV BAR according to the PE# allocated to the VFs.
1578 * Otherwise, the PE# for the VF will conflict with others.
1580 if (!pdn->m64_single_mode) {
1581 ret = pnv_pci_vf_resource_shift(pdev, *pdn->pe_num_map);
1588 pnv_ioda_setup_vf_PE(pdev, num_vfs);
1593 if (pdn->m64_single_mode) {
1594 for (i = 0; i < num_vfs; i++) {
1595 if (pdn->pe_num_map[i] == IODA_INVALID_PE)
1598 pe = &phb->ioda.pe_array[pdn->pe_num_map[i]];
1599 pnv_ioda_free_pe(pe);
1602 bitmap_clear(phb->ioda.pe_alloc, *pdn->pe_num_map, num_vfs);
1604 /* Releasing pe_num_map */
1605 kfree(pdn->pe_num_map);
1610 int pcibios_sriov_disable(struct pci_dev *pdev)
1612 pnv_pci_sriov_disable(pdev);
1614 /* Release PCI data */
1615 remove_dev_pci_data(pdev);
1619 int pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs)
1621 /* Allocate PCI data */
1622 add_dev_pci_data(pdev);
1624 return pnv_pci_sriov_enable(pdev, num_vfs);
1626 #endif /* CONFIG_PCI_IOV */
1628 static void pnv_pci_ioda_dma_dev_setup(struct pnv_phb *phb, struct pci_dev *pdev)
1630 struct pci_dn *pdn = pci_get_pdn(pdev);
1631 struct pnv_ioda_pe *pe;
1634 * The function can be called while the PE#
1635 * hasn't been assigned. Do nothing for the
1638 if (!pdn || pdn->pe_number == IODA_INVALID_PE)
1641 pe = &phb->ioda.pe_array[pdn->pe_number];
1642 WARN_ON(get_dma_ops(&pdev->dev) != &dma_iommu_ops);
1643 set_dma_offset(&pdev->dev, pe->tce_bypass_base);
1644 set_iommu_table_base(&pdev->dev, pe->table_group.tables[0]);
1646 * Note: iommu_add_device() will fail here as
1647 * for physical PE: the device is already added by now;
1648 * for virtual PE: sysfs entries are not ready yet and
1649 * tce_iommu_bus_notifier will add the device to a group later.
1653 static int pnv_pci_ioda_dma_set_mask(struct pci_dev *pdev, u64 dma_mask)
1655 struct pci_controller *hose = pci_bus_to_host(pdev->bus);
1656 struct pnv_phb *phb = hose->private_data;
1657 struct pci_dn *pdn = pci_get_pdn(pdev);
1658 struct pnv_ioda_pe *pe;
1660 bool bypass = false;
1662 if (WARN_ON(!pdn || pdn->pe_number == IODA_INVALID_PE))
1665 pe = &phb->ioda.pe_array[pdn->pe_number];
1666 if (pe->tce_bypass_enabled) {
1667 top = pe->tce_bypass_base + memblock_end_of_DRAM() - 1;
1668 bypass = (dma_mask >= top);
1672 dev_info(&pdev->dev, "Using 64-bit DMA iommu bypass\n");
1673 set_dma_ops(&pdev->dev, &dma_direct_ops);
1675 dev_info(&pdev->dev, "Using 32-bit DMA via iommu\n");
1676 set_dma_ops(&pdev->dev, &dma_iommu_ops);
1678 *pdev->dev.dma_mask = dma_mask;
1680 /* Update peer npu devices */
1681 pnv_npu_try_dma_set_bypass(pdev, bypass);
1686 static u64 pnv_pci_ioda_dma_get_required_mask(struct pci_dev *pdev)
1688 struct pci_controller *hose = pci_bus_to_host(pdev->bus);
1689 struct pnv_phb *phb = hose->private_data;
1690 struct pci_dn *pdn = pci_get_pdn(pdev);
1691 struct pnv_ioda_pe *pe;
1694 if (WARN_ON(!pdn || pdn->pe_number == IODA_INVALID_PE))
1697 pe = &phb->ioda.pe_array[pdn->pe_number];
1698 if (!pe->tce_bypass_enabled)
1699 return __dma_get_required_mask(&pdev->dev);
1702 end = pe->tce_bypass_base + memblock_end_of_DRAM();
1703 mask = 1ULL << (fls64(end) - 1);
1709 static void pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe,
1710 struct pci_bus *bus)
1712 struct pci_dev *dev;
1714 list_for_each_entry(dev, &bus->devices, bus_list) {
1715 set_iommu_table_base(&dev->dev, pe->table_group.tables[0]);
1716 set_dma_offset(&dev->dev, pe->tce_bypass_base);
1717 iommu_add_device(&dev->dev);
1719 if ((pe->flags & PNV_IODA_PE_BUS_ALL) && dev->subordinate)
1720 pnv_ioda_setup_bus_dma(pe, dev->subordinate);
1724 static void pnv_pci_ioda1_tce_invalidate(struct iommu_table *tbl,
1725 unsigned long index, unsigned long npages, bool rm)
1727 struct iommu_table_group_link *tgl = list_first_entry_or_null(
1728 &tbl->it_group_list, struct iommu_table_group_link,
1730 struct pnv_ioda_pe *pe = container_of(tgl->table_group,
1731 struct pnv_ioda_pe, table_group);
1732 __be64 __iomem *invalidate = rm ?
1733 (__be64 __iomem *)pe->phb->ioda.tce_inval_reg_phys :
1734 pe->phb->ioda.tce_inval_reg;
1735 unsigned long start, end, inc;
1736 const unsigned shift = tbl->it_page_shift;
1738 start = __pa(((__be64 *)tbl->it_base) + index - tbl->it_offset);
1739 end = __pa(((__be64 *)tbl->it_base) + index - tbl->it_offset +
1742 /* BML uses this case for p6/p7/galaxy2: Shift addr and put in node */
1743 if (tbl->it_busno) {
1746 inc = 128ull << shift;
1747 start |= tbl->it_busno;
1748 end |= tbl->it_busno;
1749 } else if (tbl->it_type & TCE_PCI_SWINV_PAIR) {
1750 /* p7ioc-style invalidation, 2 TCEs per write */
1751 start |= (1ull << 63);
1752 end |= (1ull << 63);
1755 /* Default (older HW) */
1759 end |= inc - 1; /* round up end to be different than start */
1761 mb(); /* Ensure above stores are visible */
1762 while (start <= end) {
1764 __raw_rm_writeq(cpu_to_be64(start), invalidate);
1766 __raw_writeq(cpu_to_be64(start), invalidate);
1771 * The iommu layer will do another mb() for us on build()
1772 * and we don't care on free()
1776 static int pnv_ioda1_tce_build(struct iommu_table *tbl, long index,
1777 long npages, unsigned long uaddr,
1778 enum dma_data_direction direction,
1779 struct dma_attrs *attrs)
1781 int ret = pnv_tce_build(tbl, index, npages, uaddr, direction,
1784 if (!ret && (tbl->it_type & TCE_PCI_SWINV_CREATE))
1785 pnv_pci_ioda1_tce_invalidate(tbl, index, npages, false);
1790 #ifdef CONFIG_IOMMU_API
1791 static int pnv_ioda1_tce_xchg(struct iommu_table *tbl, long index,
1792 unsigned long *hpa, enum dma_data_direction *direction)
1794 long ret = pnv_tce_xchg(tbl, index, hpa, direction);
1796 if (!ret && (tbl->it_type &
1797 (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE)))
1798 pnv_pci_ioda1_tce_invalidate(tbl, index, 1, false);
1804 static void pnv_ioda1_tce_free(struct iommu_table *tbl, long index,
1807 pnv_tce_free(tbl, index, npages);
1809 if (tbl->it_type & TCE_PCI_SWINV_FREE)
1810 pnv_pci_ioda1_tce_invalidate(tbl, index, npages, false);
1813 static struct iommu_table_ops pnv_ioda1_iommu_ops = {
1814 .set = pnv_ioda1_tce_build,
1815 #ifdef CONFIG_IOMMU_API
1816 .exchange = pnv_ioda1_tce_xchg,
1818 .clear = pnv_ioda1_tce_free,
1822 #define TCE_KILL_INVAL_ALL PPC_BIT(0)
1823 #define TCE_KILL_INVAL_PE PPC_BIT(1)
1824 #define TCE_KILL_INVAL_TCE PPC_BIT(2)
1826 void pnv_pci_ioda2_tce_invalidate_entire(struct pnv_phb *phb, bool rm)
1828 const unsigned long val = TCE_KILL_INVAL_ALL;
1830 mb(); /* Ensure previous TCE table stores are visible */
1832 __raw_rm_writeq(cpu_to_be64(val),
1834 phb->ioda.tce_inval_reg_phys);
1836 __raw_writeq(cpu_to_be64(val), phb->ioda.tce_inval_reg);
1839 static inline void pnv_pci_ioda2_tce_invalidate_pe(struct pnv_ioda_pe *pe)
1841 /* 01xb - invalidate TCEs that match the specified PE# */
1842 unsigned long val = TCE_KILL_INVAL_PE | (pe->pe_number & 0xFF);
1843 struct pnv_phb *phb = pe->phb;
1845 if (!phb->ioda.tce_inval_reg)
1848 mb(); /* Ensure above stores are visible */
1849 __raw_writeq(cpu_to_be64(val), phb->ioda.tce_inval_reg);
1852 static void pnv_pci_ioda2_do_tce_invalidate(unsigned pe_number, bool rm,
1853 __be64 __iomem *invalidate, unsigned shift,
1854 unsigned long index, unsigned long npages)
1856 unsigned long start, end, inc;
1858 /* We'll invalidate DMA address in PE scope */
1859 start = TCE_KILL_INVAL_TCE;
1860 start |= (pe_number & 0xFF);
1863 /* Figure out the start, end and step */
1864 start |= (index << shift);
1865 end |= ((index + npages - 1) << shift);
1866 inc = (0x1ull << shift);
1869 while (start <= end) {
1871 __raw_rm_writeq(cpu_to_be64(start), invalidate);
1873 __raw_writeq(cpu_to_be64(start), invalidate);
1878 static void pnv_pci_ioda2_tce_invalidate(struct iommu_table *tbl,
1879 unsigned long index, unsigned long npages, bool rm)
1881 struct iommu_table_group_link *tgl;
1883 list_for_each_entry_rcu(tgl, &tbl->it_group_list, next) {
1884 struct pnv_ioda_pe *pe = container_of(tgl->table_group,
1885 struct pnv_ioda_pe, table_group);
1886 __be64 __iomem *invalidate = rm ?
1887 (__be64 __iomem *)pe->phb->ioda.tce_inval_reg_phys :
1888 pe->phb->ioda.tce_inval_reg;
1890 if (pe->phb->type == PNV_PHB_NPU) {
1892 * The NVLink hardware does not support TCE kill
1893 * per TCE entry so we have to invalidate
1894 * the entire cache for it.
1896 pnv_pci_ioda2_tce_invalidate_entire(pe->phb, rm);
1899 pnv_pci_ioda2_do_tce_invalidate(pe->pe_number, rm,
1900 invalidate, tbl->it_page_shift,
1905 static int pnv_ioda2_tce_build(struct iommu_table *tbl, long index,
1906 long npages, unsigned long uaddr,
1907 enum dma_data_direction direction,
1908 struct dma_attrs *attrs)
1910 int ret = pnv_tce_build(tbl, index, npages, uaddr, direction,
1913 if (!ret && (tbl->it_type & TCE_PCI_SWINV_CREATE))
1914 pnv_pci_ioda2_tce_invalidate(tbl, index, npages, false);
1919 #ifdef CONFIG_IOMMU_API
1920 static int pnv_ioda2_tce_xchg(struct iommu_table *tbl, long index,
1921 unsigned long *hpa, enum dma_data_direction *direction)
1923 long ret = pnv_tce_xchg(tbl, index, hpa, direction);
1925 if (!ret && (tbl->it_type &
1926 (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE)))
1927 pnv_pci_ioda2_tce_invalidate(tbl, index, 1, false);
1933 static void pnv_ioda2_tce_free(struct iommu_table *tbl, long index,
1936 pnv_tce_free(tbl, index, npages);
1938 if (tbl->it_type & TCE_PCI_SWINV_FREE)
1939 pnv_pci_ioda2_tce_invalidate(tbl, index, npages, false);
1942 static void pnv_ioda2_table_free(struct iommu_table *tbl)
1944 pnv_pci_ioda2_table_free_pages(tbl);
1945 iommu_free_table(tbl, "pnv");
1948 static struct iommu_table_ops pnv_ioda2_iommu_ops = {
1949 .set = pnv_ioda2_tce_build,
1950 #ifdef CONFIG_IOMMU_API
1951 .exchange = pnv_ioda2_tce_xchg,
1953 .clear = pnv_ioda2_tce_free,
1955 .free = pnv_ioda2_table_free,
1958 static int pnv_pci_ioda_dev_dma_weight(struct pci_dev *dev, void *data)
1960 unsigned int *weight = (unsigned int *)data;
1962 /* This is quite simplistic. The "base" weight of a device
1963 * is 10. 0 means no DMA is to be accounted for it.
1965 if (dev->hdr_type != PCI_HEADER_TYPE_NORMAL)
1968 if (dev->class == PCI_CLASS_SERIAL_USB_UHCI ||
1969 dev->class == PCI_CLASS_SERIAL_USB_OHCI ||
1970 dev->class == PCI_CLASS_SERIAL_USB_EHCI)
1972 else if ((dev->class >> 8) == PCI_CLASS_STORAGE_RAID)
1980 static unsigned int pnv_pci_ioda_pe_dma_weight(struct pnv_ioda_pe *pe)
1982 unsigned int weight = 0;
1984 /* SRIOV VF has same DMA32 weight as its PF */
1985 #ifdef CONFIG_PCI_IOV
1986 if ((pe->flags & PNV_IODA_PE_VF) && pe->parent_dev) {
1987 pnv_pci_ioda_dev_dma_weight(pe->parent_dev, &weight);
1992 if ((pe->flags & PNV_IODA_PE_DEV) && pe->pdev) {
1993 pnv_pci_ioda_dev_dma_weight(pe->pdev, &weight);
1994 } else if ((pe->flags & PNV_IODA_PE_BUS) && pe->pbus) {
1995 struct pci_dev *pdev;
1997 list_for_each_entry(pdev, &pe->pbus->devices, bus_list)
1998 pnv_pci_ioda_dev_dma_weight(pdev, &weight);
1999 } else if ((pe->flags & PNV_IODA_PE_BUS_ALL) && pe->pbus) {
2000 pci_walk_bus(pe->pbus, pnv_pci_ioda_dev_dma_weight, &weight);
2006 static void pnv_pci_ioda1_setup_dma_pe(struct pnv_phb *phb,
2007 struct pnv_ioda_pe *pe)
2010 struct page *tce_mem = NULL;
2011 struct iommu_table *tbl;
2012 unsigned int weight, total_weight = 0;
2013 unsigned int tce32_segsz, base, segs, avail, i;
2017 /* XXX FIXME: Handle 64-bit only DMA devices */
2018 /* XXX FIXME: Provide 64-bit DMA facilities & non-4K TCE tables etc.. */
2019 /* XXX FIXME: Allocate multi-level tables on PHB3 */
2020 weight = pnv_pci_ioda_pe_dma_weight(pe);
2024 pci_walk_bus(phb->hose->bus, pnv_pci_ioda_dev_dma_weight,
2026 segs = (weight * phb->ioda.dma32_count) / total_weight;
2031 * Allocate contiguous DMA32 segments. We begin with the expected
2032 * number of segments. With one more attempt, the number of DMA32
2033 * segments to be allocated is decreased by one until one segment
2034 * is allocated successfully.
2037 for (base = 0; base <= phb->ioda.dma32_count - segs; base++) {
2038 for (avail = 0, i = base; i < base + segs; i++) {
2039 if (phb->ioda.dma32_segmap[i] ==
2050 pe_warn(pe, "No available DMA32 segments\n");
2055 tbl = pnv_pci_table_alloc(phb->hose->node);
2056 iommu_register_group(&pe->table_group, phb->hose->global_number,
2058 pnv_pci_link_table_and_group(phb->hose->node, 0, tbl, &pe->table_group);
2060 /* Grab a 32-bit TCE table */
2061 pe_info(pe, "DMA weight %d (%d), assigned (%d) %d DMA32 segments\n",
2062 weight, total_weight, base, segs);
2063 pe_info(pe, " Setting up 32-bit TCE table at %08x..%08x\n",
2064 base * PNV_IODA1_DMA32_SEGSIZE,
2065 (base + segs) * PNV_IODA1_DMA32_SEGSIZE - 1);
2067 /* XXX Currently, we allocate one big contiguous table for the
2068 * TCEs. We only really need one chunk per 256M of TCE space
2069 * (ie per segment) but that's an optimization for later, it
2070 * requires some added smarts with our get/put_tce implementation
2072 * Each TCE page is 4KB in size and each TCE entry occupies 8
2075 tce32_segsz = PNV_IODA1_DMA32_SEGSIZE >> (IOMMU_PAGE_SHIFT_4K - 3);
2076 tce_mem = alloc_pages_node(phb->hose->node, GFP_KERNEL,
2077 get_order(tce32_segsz * segs));
2079 pe_err(pe, " Failed to allocate a 32-bit TCE memory\n");
2082 addr = page_address(tce_mem);
2083 memset(addr, 0, tce32_segsz * segs);
2086 for (i = 0; i < segs; i++) {
2087 rc = opal_pci_map_pe_dma_window(phb->opal_id,
2090 __pa(addr) + tce32_segsz * i,
2091 tce32_segsz, IOMMU_PAGE_SIZE_4K);
2093 pe_err(pe, " Failed to configure 32-bit TCE table,"
2099 /* Setup DMA32 segment mapping */
2100 for (i = base; i < base + segs; i++)
2101 phb->ioda.dma32_segmap[i] = pe->pe_number;
2103 /* Setup linux iommu table */
2104 pnv_pci_setup_iommu_table(tbl, addr, tce32_segsz * segs,
2105 base * PNV_IODA1_DMA32_SEGSIZE,
2106 IOMMU_PAGE_SHIFT_4K);
2108 /* OPAL variant of P7IOC SW invalidated TCEs */
2109 if (phb->ioda.tce_inval_reg)
2110 tbl->it_type |= (TCE_PCI_SWINV_CREATE |
2111 TCE_PCI_SWINV_FREE |
2112 TCE_PCI_SWINV_PAIR);
2114 tbl->it_ops = &pnv_ioda1_iommu_ops;
2115 pe->table_group.tce32_start = tbl->it_offset << tbl->it_page_shift;
2116 pe->table_group.tce32_size = tbl->it_size << tbl->it_page_shift;
2117 iommu_init_table(tbl, phb->hose->node);
2119 if (pe->flags & PNV_IODA_PE_DEV) {
2121 * Setting table base here only for carrying iommu_group
2122 * further down to let iommu_add_device() do the job.
2123 * pnv_pci_ioda_dma_dev_setup will override it later anyway.
2125 set_iommu_table_base(&pe->pdev->dev, tbl);
2126 iommu_add_device(&pe->pdev->dev);
2127 } else if (pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL))
2128 pnv_ioda_setup_bus_dma(pe, pe->pbus);
2132 /* XXX Failure: Try to fallback to 64-bit only ? */
2134 __free_pages(tce_mem, get_order(tce32_segsz * segs));
2136 pnv_pci_unlink_table_and_group(tbl, &pe->table_group);
2137 iommu_free_table(tbl, "pnv");
2141 static long pnv_pci_ioda2_set_window(struct iommu_table_group *table_group,
2142 int num, struct iommu_table *tbl)
2144 struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe,
2146 struct pnv_phb *phb = pe->phb;
2148 const unsigned long size = tbl->it_indirect_levels ?
2149 tbl->it_level_size : tbl->it_size;
2150 const __u64 start_addr = tbl->it_offset << tbl->it_page_shift;
2151 const __u64 win_size = tbl->it_size << tbl->it_page_shift;
2153 pe_info(pe, "Setting up window#%d %llx..%llx pg=%x\n", num,
2154 start_addr, start_addr + win_size - 1,
2155 IOMMU_PAGE_SIZE(tbl));
2158 * Map TCE table through TVT. The TVE index is the PE number
2159 * shifted by 1 bit for 32-bits DMA space.
2161 rc = opal_pci_map_pe_dma_window(phb->opal_id,
2163 (pe->pe_number << 1) + num,
2164 tbl->it_indirect_levels + 1,
2167 IOMMU_PAGE_SIZE(tbl));
2169 pe_err(pe, "Failed to configure TCE table, err %ld\n", rc);
2173 pnv_pci_link_table_and_group(phb->hose->node, num,
2174 tbl, &pe->table_group);
2175 pnv_pci_ioda2_tce_invalidate_pe(pe);
2180 static void pnv_pci_ioda2_set_bypass(struct pnv_ioda_pe *pe, bool enable)
2182 uint16_t window_id = (pe->pe_number << 1 ) + 1;
2185 pe_info(pe, "%sabling 64-bit DMA bypass\n", enable ? "En" : "Dis");
2187 phys_addr_t top = memblock_end_of_DRAM();
2189 top = roundup_pow_of_two(top);
2190 rc = opal_pci_map_pe_dma_window_real(pe->phb->opal_id,
2193 pe->tce_bypass_base,
2196 rc = opal_pci_map_pe_dma_window_real(pe->phb->opal_id,
2199 pe->tce_bypass_base,
2203 pe_err(pe, "OPAL error %lld configuring bypass window\n", rc);
2205 pe->tce_bypass_enabled = enable;
2208 static long pnv_pci_ioda2_table_alloc_pages(int nid, __u64 bus_offset,
2209 __u32 page_shift, __u64 window_size, __u32 levels,
2210 struct iommu_table *tbl);
2212 static long pnv_pci_ioda2_create_table(struct iommu_table_group *table_group,
2213 int num, __u32 page_shift, __u64 window_size, __u32 levels,
2214 struct iommu_table **ptbl)
2216 struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe,
2218 int nid = pe->phb->hose->node;
2219 __u64 bus_offset = num ? pe->tce_bypass_base : table_group->tce32_start;
2221 struct iommu_table *tbl;
2223 tbl = pnv_pci_table_alloc(nid);
2227 ret = pnv_pci_ioda2_table_alloc_pages(nid,
2228 bus_offset, page_shift, window_size,
2231 iommu_free_table(tbl, "pnv");
2235 tbl->it_ops = &pnv_ioda2_iommu_ops;
2236 if (pe->phb->ioda.tce_inval_reg)
2237 tbl->it_type |= (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE);
2244 static long pnv_pci_ioda2_setup_default_config(struct pnv_ioda_pe *pe)
2246 struct iommu_table *tbl = NULL;
2250 * crashkernel= specifies the kdump kernel's maximum memory at
2251 * some offset and there is no guaranteed the result is a power
2252 * of 2, which will cause errors later.
2254 const u64 max_memory = __rounddown_pow_of_two(memory_hotplug_max());
2257 * In memory constrained environments, e.g. kdump kernel, the
2258 * DMA window can be larger than available memory, which will
2259 * cause errors later.
2261 const u64 window_size = min((u64)pe->table_group.tce32_size, max_memory);
2263 rc = pnv_pci_ioda2_create_table(&pe->table_group, 0,
2264 IOMMU_PAGE_SHIFT_4K,
2266 POWERNV_IOMMU_DEFAULT_LEVELS, &tbl);
2268 pe_err(pe, "Failed to create 32-bit TCE table, err %ld",
2273 iommu_init_table(tbl, pe->phb->hose->node);
2275 rc = pnv_pci_ioda2_set_window(&pe->table_group, 0, tbl);
2277 pe_err(pe, "Failed to configure 32-bit TCE table, err %ld\n",
2279 pnv_ioda2_table_free(tbl);
2283 if (!pnv_iommu_bypass_disabled)
2284 pnv_pci_ioda2_set_bypass(pe, true);
2286 /* OPAL variant of PHB3 invalidated TCEs */
2287 if (pe->phb->ioda.tce_inval_reg)
2288 tbl->it_type |= (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE);
2291 * Setting table base here only for carrying iommu_group
2292 * further down to let iommu_add_device() do the job.
2293 * pnv_pci_ioda_dma_dev_setup will override it later anyway.
2295 if (pe->flags & PNV_IODA_PE_DEV)
2296 set_iommu_table_base(&pe->pdev->dev, tbl);
2301 #if defined(CONFIG_IOMMU_API) || defined(CONFIG_PCI_IOV)
2302 static long pnv_pci_ioda2_unset_window(struct iommu_table_group *table_group,
2305 struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe,
2307 struct pnv_phb *phb = pe->phb;
2310 pe_info(pe, "Removing DMA window #%d\n", num);
2312 ret = opal_pci_map_pe_dma_window(phb->opal_id, pe->pe_number,
2313 (pe->pe_number << 1) + num,
2314 0/* levels */, 0/* table address */,
2315 0/* table size */, 0/* page size */);
2317 pe_warn(pe, "Unmapping failed, ret = %ld\n", ret);
2319 pnv_pci_ioda2_tce_invalidate_pe(pe);
2321 pnv_pci_unlink_table_and_group(table_group->tables[num], table_group);
2327 #ifdef CONFIG_IOMMU_API
2328 static unsigned long pnv_pci_ioda2_get_table_size(__u32 page_shift,
2329 __u64 window_size, __u32 levels)
2331 unsigned long bytes = 0;
2332 const unsigned window_shift = ilog2(window_size);
2333 unsigned entries_shift = window_shift - page_shift;
2334 unsigned table_shift = entries_shift + 3;
2335 unsigned long tce_table_size = max(0x1000UL, 1UL << table_shift);
2336 unsigned long direct_table_size;
2338 if (!levels || (levels > POWERNV_IOMMU_MAX_LEVELS) ||
2339 (window_size > memory_hotplug_max()) ||
2340 !is_power_of_2(window_size))
2343 /* Calculate a direct table size from window_size and levels */
2344 entries_shift = (entries_shift + levels - 1) / levels;
2345 table_shift = entries_shift + 3;
2346 table_shift = max_t(unsigned, table_shift, PAGE_SHIFT);
2347 direct_table_size = 1UL << table_shift;
2349 for ( ; levels; --levels) {
2350 bytes += _ALIGN_UP(tce_table_size, direct_table_size);
2352 tce_table_size /= direct_table_size;
2353 tce_table_size <<= 3;
2354 tce_table_size = _ALIGN_UP(tce_table_size, direct_table_size);
2360 static void pnv_ioda2_take_ownership(struct iommu_table_group *table_group)
2362 struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe,
2364 /* Store @tbl as pnv_pci_ioda2_unset_window() resets it */
2365 struct iommu_table *tbl = pe->table_group.tables[0];
2367 pnv_pci_ioda2_set_bypass(pe, false);
2368 pnv_pci_ioda2_unset_window(&pe->table_group, 0);
2369 pnv_ioda2_table_free(tbl);
2372 static void pnv_ioda2_release_ownership(struct iommu_table_group *table_group)
2374 struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe,
2377 pnv_pci_ioda2_setup_default_config(pe);
2380 static struct iommu_table_group_ops pnv_pci_ioda2_ops = {
2381 .get_table_size = pnv_pci_ioda2_get_table_size,
2382 .create_table = pnv_pci_ioda2_create_table,
2383 .set_window = pnv_pci_ioda2_set_window,
2384 .unset_window = pnv_pci_ioda2_unset_window,
2385 .take_ownership = pnv_ioda2_take_ownership,
2386 .release_ownership = pnv_ioda2_release_ownership,
2389 static int gpe_table_group_to_npe_cb(struct device *dev, void *opaque)
2391 struct pci_controller *hose;
2392 struct pnv_phb *phb;
2393 struct pnv_ioda_pe **ptmppe = opaque;
2394 struct pci_dev *pdev = container_of(dev, struct pci_dev, dev);
2395 struct pci_dn *pdn = pci_get_pdn(pdev);
2397 if (!pdn || pdn->pe_number == IODA_INVALID_PE)
2400 hose = pci_bus_to_host(pdev->bus);
2401 phb = hose->private_data;
2402 if (phb->type != PNV_PHB_NPU)
2405 *ptmppe = &phb->ioda.pe_array[pdn->pe_number];
2411 * This returns PE of associated NPU.
2412 * This assumes that NPU is in the same IOMMU group with GPU and there is
2415 static struct pnv_ioda_pe *gpe_table_group_to_npe(
2416 struct iommu_table_group *table_group)
2418 struct pnv_ioda_pe *npe = NULL;
2419 int ret = iommu_group_for_each_dev(table_group->group, &npe,
2420 gpe_table_group_to_npe_cb);
2422 BUG_ON(!ret || !npe);
2427 static long pnv_pci_ioda2_npu_set_window(struct iommu_table_group *table_group,
2428 int num, struct iommu_table *tbl)
2430 long ret = pnv_pci_ioda2_set_window(table_group, num, tbl);
2435 ret = pnv_npu_set_window(gpe_table_group_to_npe(table_group), num, tbl);
2437 pnv_pci_ioda2_unset_window(table_group, num);
2442 static long pnv_pci_ioda2_npu_unset_window(
2443 struct iommu_table_group *table_group,
2446 long ret = pnv_pci_ioda2_unset_window(table_group, num);
2451 return pnv_npu_unset_window(gpe_table_group_to_npe(table_group), num);
2454 static void pnv_ioda2_npu_take_ownership(struct iommu_table_group *table_group)
2457 * Detach NPU first as pnv_ioda2_take_ownership() will destroy
2458 * the iommu_table if 32bit DMA is enabled.
2460 pnv_npu_take_ownership(gpe_table_group_to_npe(table_group));
2461 pnv_ioda2_take_ownership(table_group);
2464 static struct iommu_table_group_ops pnv_pci_ioda2_npu_ops = {
2465 .get_table_size = pnv_pci_ioda2_get_table_size,
2466 .create_table = pnv_pci_ioda2_create_table,
2467 .set_window = pnv_pci_ioda2_npu_set_window,
2468 .unset_window = pnv_pci_ioda2_npu_unset_window,
2469 .take_ownership = pnv_ioda2_npu_take_ownership,
2470 .release_ownership = pnv_ioda2_release_ownership,
2473 static void pnv_pci_ioda_setup_iommu_api(void)
2475 struct pci_controller *hose, *tmp;
2476 struct pnv_phb *phb;
2477 struct pnv_ioda_pe *pe, *gpe;
2480 * Now we have all PHBs discovered, time to add NPU devices to
2481 * the corresponding IOMMU groups.
2483 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
2484 phb = hose->private_data;
2486 if (phb->type != PNV_PHB_NPU)
2489 list_for_each_entry(pe, &phb->ioda.pe_list, list) {
2490 gpe = pnv_pci_npu_setup_iommu(pe);
2492 gpe->table_group.ops = &pnv_pci_ioda2_npu_ops;
2496 #else /* !CONFIG_IOMMU_API */
2497 static void pnv_pci_ioda_setup_iommu_api(void) { };
2500 static void pnv_pci_ioda_setup_opal_tce_kill(struct pnv_phb *phb)
2502 const __be64 *swinvp;
2504 /* OPAL variant of PHB3 invalidated TCEs */
2505 swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL);
2509 phb->ioda.tce_inval_reg_phys = be64_to_cpup(swinvp);
2510 phb->ioda.tce_inval_reg = ioremap(phb->ioda.tce_inval_reg_phys, 8);
2513 static __be64 *pnv_pci_ioda2_table_do_alloc_pages(int nid, unsigned shift,
2514 unsigned levels, unsigned long limit,
2515 unsigned long *current_offset, unsigned long *total_allocated)
2517 struct page *tce_mem = NULL;
2519 unsigned order = max_t(unsigned, shift, PAGE_SHIFT) - PAGE_SHIFT;
2520 unsigned long allocated = 1UL << (order + PAGE_SHIFT);
2521 unsigned entries = 1UL << (shift - 3);
2524 tce_mem = alloc_pages_node(nid, GFP_KERNEL, order);
2526 pr_err("Failed to allocate a TCE memory, order=%d\n", order);
2529 addr = page_address(tce_mem);
2530 memset(addr, 0, allocated);
2531 *total_allocated += allocated;
2535 *current_offset += allocated;
2539 for (i = 0; i < entries; ++i) {
2540 tmp = pnv_pci_ioda2_table_do_alloc_pages(nid, shift,
2541 levels, limit, current_offset, total_allocated);
2545 addr[i] = cpu_to_be64(__pa(tmp) |
2546 TCE_PCI_READ | TCE_PCI_WRITE);
2548 if (*current_offset >= limit)
2555 static void pnv_pci_ioda2_table_do_free_pages(__be64 *addr,
2556 unsigned long size, unsigned level);
2558 static long pnv_pci_ioda2_table_alloc_pages(int nid, __u64 bus_offset,
2559 __u32 page_shift, __u64 window_size, __u32 levels,
2560 struct iommu_table *tbl)
2563 unsigned long offset = 0, level_shift, total_allocated = 0;
2564 const unsigned window_shift = ilog2(window_size);
2565 unsigned entries_shift = window_shift - page_shift;
2566 unsigned table_shift = max_t(unsigned, entries_shift + 3, PAGE_SHIFT);
2567 const unsigned long tce_table_size = 1UL << table_shift;
2569 if (!levels || (levels > POWERNV_IOMMU_MAX_LEVELS))
2572 if ((window_size > memory_hotplug_max()) || !is_power_of_2(window_size))
2575 /* Adjust direct table size from window_size and levels */
2576 entries_shift = (entries_shift + levels - 1) / levels;
2577 level_shift = entries_shift + 3;
2578 level_shift = max_t(unsigned, level_shift, PAGE_SHIFT);
2580 /* Allocate TCE table */
2581 addr = pnv_pci_ioda2_table_do_alloc_pages(nid, level_shift,
2582 levels, tce_table_size, &offset, &total_allocated);
2584 /* addr==NULL means that the first level allocation failed */
2589 * First level was allocated but some lower level failed as
2590 * we did not allocate as much as we wanted,
2591 * release partially allocated table.
2593 if (offset < tce_table_size) {
2594 pnv_pci_ioda2_table_do_free_pages(addr,
2595 1ULL << (level_shift - 3), levels - 1);
2599 /* Setup linux iommu table */
2600 pnv_pci_setup_iommu_table(tbl, addr, tce_table_size, bus_offset,
2602 tbl->it_level_size = 1ULL << (level_shift - 3);
2603 tbl->it_indirect_levels = levels - 1;
2604 tbl->it_allocated_size = total_allocated;
2606 pr_devel("Created TCE table: ws=%08llx ts=%lx @%08llx\n",
2607 window_size, tce_table_size, bus_offset);
2612 static void pnv_pci_ioda2_table_do_free_pages(__be64 *addr,
2613 unsigned long size, unsigned level)
2615 const unsigned long addr_ul = (unsigned long) addr &
2616 ~(TCE_PCI_READ | TCE_PCI_WRITE);
2620 u64 *tmp = (u64 *) addr_ul;
2622 for (i = 0; i < size; ++i) {
2623 unsigned long hpa = be64_to_cpu(tmp[i]);
2625 if (!(hpa & (TCE_PCI_READ | TCE_PCI_WRITE)))
2628 pnv_pci_ioda2_table_do_free_pages(__va(hpa), size,
2633 free_pages(addr_ul, get_order(size << 3));
2636 static void pnv_pci_ioda2_table_free_pages(struct iommu_table *tbl)
2638 const unsigned long size = tbl->it_indirect_levels ?
2639 tbl->it_level_size : tbl->it_size;
2644 pnv_pci_ioda2_table_do_free_pages((__be64 *)tbl->it_base, size,
2645 tbl->it_indirect_levels);
2648 static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb,
2649 struct pnv_ioda_pe *pe)
2653 if (!pnv_pci_ioda_pe_dma_weight(pe))
2656 /* TVE #1 is selected by PCI address bit 59 */
2657 pe->tce_bypass_base = 1ull << 59;
2659 iommu_register_group(&pe->table_group, phb->hose->global_number,
2662 /* The PE will reserve all possible 32-bits space */
2663 pe_info(pe, "Setting up 32-bit TCE table at 0..%08x\n",
2664 phb->ioda.m32_pci_base);
2666 /* Setup linux iommu table */
2667 pe->table_group.tce32_start = 0;
2668 pe->table_group.tce32_size = phb->ioda.m32_pci_base;
2669 pe->table_group.max_dynamic_windows_supported =
2670 IOMMU_TABLE_GROUP_MAX_TABLES;
2671 pe->table_group.max_levels = POWERNV_IOMMU_MAX_LEVELS;
2672 pe->table_group.pgsizes = SZ_4K | SZ_64K | SZ_16M;
2673 #ifdef CONFIG_IOMMU_API
2674 pe->table_group.ops = &pnv_pci_ioda2_ops;
2677 rc = pnv_pci_ioda2_setup_default_config(pe);
2681 if (pe->flags & PNV_IODA_PE_DEV)
2682 iommu_add_device(&pe->pdev->dev);
2683 else if (pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL))
2684 pnv_ioda_setup_bus_dma(pe, pe->pbus);
2687 #ifdef CONFIG_PCI_MSI
2688 static void pnv_ioda2_msi_eoi(struct irq_data *d)
2690 unsigned int hw_irq = (unsigned int)irqd_to_hwirq(d);
2691 struct irq_chip *chip = irq_data_get_irq_chip(d);
2692 struct pnv_phb *phb = container_of(chip, struct pnv_phb,
2696 rc = opal_pci_msi_eoi(phb->opal_id, hw_irq);
2703 void pnv_set_msi_irq_chip(struct pnv_phb *phb, unsigned int virq)
2705 struct irq_data *idata;
2706 struct irq_chip *ichip;
2708 if (phb->type != PNV_PHB_IODA2)
2711 if (!phb->ioda.irq_chip_init) {
2713 * First time we setup an MSI IRQ, we need to setup the
2714 * corresponding IRQ chip to route correctly.
2716 idata = irq_get_irq_data(virq);
2717 ichip = irq_data_get_irq_chip(idata);
2718 phb->ioda.irq_chip_init = 1;
2719 phb->ioda.irq_chip = *ichip;
2720 phb->ioda.irq_chip.irq_eoi = pnv_ioda2_msi_eoi;
2722 irq_set_chip(virq, &phb->ioda.irq_chip);
2725 static int pnv_pci_ioda_msi_setup(struct pnv_phb *phb, struct pci_dev *dev,
2726 unsigned int hwirq, unsigned int virq,
2727 unsigned int is_64, struct msi_msg *msg)
2729 struct pnv_ioda_pe *pe = pnv_ioda_get_pe(dev);
2730 unsigned int xive_num = hwirq - phb->msi_base;
2734 /* No PE assigned ? bail out ... no MSI for you ! */
2738 /* Check if we have an MVE */
2739 if (pe->mve_number < 0)
2742 /* Force 32-bit MSI on some broken devices */
2743 if (dev->no_64bit_msi)
2746 /* Assign XIVE to PE */
2747 rc = opal_pci_set_xive_pe(phb->opal_id, pe->pe_number, xive_num);
2749 pr_warn("%s: OPAL error %d setting XIVE %d PE\n",
2750 pci_name(dev), rc, xive_num);
2757 rc = opal_get_msi_64(phb->opal_id, pe->mve_number, xive_num, 1,
2760 pr_warn("%s: OPAL error %d getting 64-bit MSI data\n",
2764 msg->address_hi = be64_to_cpu(addr64) >> 32;
2765 msg->address_lo = be64_to_cpu(addr64) & 0xfffffffful;
2769 rc = opal_get_msi_32(phb->opal_id, pe->mve_number, xive_num, 1,
2772 pr_warn("%s: OPAL error %d getting 32-bit MSI data\n",
2776 msg->address_hi = 0;
2777 msg->address_lo = be32_to_cpu(addr32);
2779 msg->data = be32_to_cpu(data);
2781 pnv_set_msi_irq_chip(phb, virq);
2783 pr_devel("%s: %s-bit MSI on hwirq %x (xive #%d),"
2784 " address=%x_%08x data=%x PE# %d\n",
2785 pci_name(dev), is_64 ? "64" : "32", hwirq, xive_num,
2786 msg->address_hi, msg->address_lo, data, pe->pe_number);
2791 static void pnv_pci_init_ioda_msis(struct pnv_phb *phb)
2794 const __be32 *prop = of_get_property(phb->hose->dn,
2795 "ibm,opal-msi-ranges", NULL);
2798 prop = of_get_property(phb->hose->dn, "msi-ranges", NULL);
2803 phb->msi_base = be32_to_cpup(prop);
2804 count = be32_to_cpup(prop + 1);
2805 if (msi_bitmap_alloc(&phb->msi_bmp, count, phb->hose->dn)) {
2806 pr_err("PCI %d: Failed to allocate MSI bitmap !\n",
2807 phb->hose->global_number);
2811 phb->msi_setup = pnv_pci_ioda_msi_setup;
2812 phb->msi32_support = 1;
2813 pr_info(" Allocated bitmap for %d MSIs (base IRQ 0x%x)\n",
2814 count, phb->msi_base);
2817 static void pnv_pci_init_ioda_msis(struct pnv_phb *phb) { }
2818 #endif /* CONFIG_PCI_MSI */
2820 #ifdef CONFIG_PCI_IOV
2821 static void pnv_pci_ioda_fixup_iov_resources(struct pci_dev *pdev)
2823 struct pci_controller *hose = pci_bus_to_host(pdev->bus);
2824 struct pnv_phb *phb = hose->private_data;
2825 const resource_size_t gate = phb->ioda.m64_segsize >> 2;
2826 struct resource *res;
2828 resource_size_t size, total_vf_bar_sz;
2832 if (!pdev->is_physfn || pdev->is_added)
2835 pdn = pci_get_pdn(pdev);
2836 pdn->vfs_expanded = 0;
2837 pdn->m64_single_mode = false;
2839 total_vfs = pci_sriov_get_totalvfs(pdev);
2840 mul = phb->ioda.total_pe_num;
2841 total_vf_bar_sz = 0;
2843 for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
2844 res = &pdev->resource[i + PCI_IOV_RESOURCES];
2845 if (!res->flags || res->parent)
2847 if (!pnv_pci_is_mem_pref_64(res->flags)) {
2848 dev_warn(&pdev->dev, "Don't support SR-IOV with"
2849 " non M64 VF BAR%d: %pR. \n",
2854 total_vf_bar_sz += pci_iov_resource_size(pdev,
2855 i + PCI_IOV_RESOURCES);
2858 * If bigger than quarter of M64 segment size, just round up
2861 * Generally, one M64 BAR maps one IOV BAR. To avoid conflict
2862 * with other devices, IOV BAR size is expanded to be
2863 * (total_pe * VF_BAR_size). When VF_BAR_size is half of M64
2864 * segment size , the expanded size would equal to half of the
2865 * whole M64 space size, which will exhaust the M64 Space and
2866 * limit the system flexibility. This is a design decision to
2867 * set the boundary to quarter of the M64 segment size.
2869 if (total_vf_bar_sz > gate) {
2870 mul = roundup_pow_of_two(total_vfs);
2871 dev_info(&pdev->dev,
2872 "VF BAR Total IOV size %llx > %llx, roundup to %d VFs\n",
2873 total_vf_bar_sz, gate, mul);
2874 pdn->m64_single_mode = true;
2879 for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
2880 res = &pdev->resource[i + PCI_IOV_RESOURCES];
2881 if (!res->flags || res->parent)
2884 size = pci_iov_resource_size(pdev, i + PCI_IOV_RESOURCES);
2886 * On PHB3, the minimum size alignment of M64 BAR in single
2889 if (pdn->m64_single_mode && (size < SZ_32M))
2891 dev_dbg(&pdev->dev, " Fixing VF BAR%d: %pR to\n", i, res);
2892 res->end = res->start + size * mul - 1;
2893 dev_dbg(&pdev->dev, " %pR\n", res);
2894 dev_info(&pdev->dev, "VF BAR%d: %pR (expanded to %d VFs for PE alignment)",
2897 pdn->vfs_expanded = mul;
2902 /* To save MMIO space, IOV BAR is truncated. */
2903 for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
2904 res = &pdev->resource[i + PCI_IOV_RESOURCES];
2906 res->end = res->start - 1;
2909 #endif /* CONFIG_PCI_IOV */
2911 static void pnv_ioda_setup_pe_res(struct pnv_ioda_pe *pe,
2912 struct resource *res)
2914 struct pnv_phb *phb = pe->phb;
2915 struct pci_bus_region region;
2919 if (!res || !res->flags || res->start > res->end)
2922 if (res->flags & IORESOURCE_IO) {
2923 region.start = res->start - phb->ioda.io_pci_base;
2924 region.end = res->end - phb->ioda.io_pci_base;
2925 index = region.start / phb->ioda.io_segsize;
2927 while (index < phb->ioda.total_pe_num &&
2928 region.start <= region.end) {
2929 phb->ioda.io_segmap[index] = pe->pe_number;
2930 rc = opal_pci_map_pe_mmio_window(phb->opal_id,
2931 pe->pe_number, OPAL_IO_WINDOW_TYPE, 0, index);
2932 if (rc != OPAL_SUCCESS) {
2933 pr_err("%s: Error %lld mapping IO segment#%d to PE#%d\n",
2934 __func__, rc, index, pe->pe_number);
2938 region.start += phb->ioda.io_segsize;
2941 } else if ((res->flags & IORESOURCE_MEM) &&
2942 !pnv_pci_is_mem_pref_64(res->flags)) {
2943 region.start = res->start -
2944 phb->hose->mem_offset[0] -
2945 phb->ioda.m32_pci_base;
2946 region.end = res->end -
2947 phb->hose->mem_offset[0] -
2948 phb->ioda.m32_pci_base;
2949 index = region.start / phb->ioda.m32_segsize;
2951 while (index < phb->ioda.total_pe_num &&
2952 region.start <= region.end) {
2953 phb->ioda.m32_segmap[index] = pe->pe_number;
2954 rc = opal_pci_map_pe_mmio_window(phb->opal_id,
2955 pe->pe_number, OPAL_M32_WINDOW_TYPE, 0, index);
2956 if (rc != OPAL_SUCCESS) {
2957 pr_err("%s: Error %lld mapping M32 segment#%d to PE#%d",
2958 __func__, rc, index, pe->pe_number);
2962 region.start += phb->ioda.m32_segsize;
2969 * This function is supposed to be called on basis of PE from top
2970 * to bottom style. So the the I/O or MMIO segment assigned to
2971 * parent PE could be overrided by its child PEs if necessary.
2973 static void pnv_ioda_setup_pe_seg(struct pnv_ioda_pe *pe)
2975 struct pci_dev *pdev;
2979 * NOTE: We only care PCI bus based PE for now. For PCI
2980 * device based PE, for example SRIOV sensitive VF should
2981 * be figured out later.
2983 BUG_ON(!(pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL)));
2985 list_for_each_entry(pdev, &pe->pbus->devices, bus_list) {
2986 for (i = 0; i <= PCI_ROM_RESOURCE; i++)
2987 pnv_ioda_setup_pe_res(pe, &pdev->resource[i]);
2990 * If the PE contains all subordinate PCI buses, the
2991 * windows of the child bridges should be mapped to
2994 if (!(pe->flags & PNV_IODA_PE_BUS_ALL) || !pci_is_bridge(pdev))
2996 for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++)
2997 pnv_ioda_setup_pe_res(pe,
2998 &pdev->resource[PCI_BRIDGE_RESOURCES + i]);
3002 static void pnv_pci_ioda_create_dbgfs(void)
3004 #ifdef CONFIG_DEBUG_FS
3005 struct pci_controller *hose, *tmp;
3006 struct pnv_phb *phb;
3009 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
3010 phb = hose->private_data;
3012 /* Notify initialization of PHB done */
3013 phb->initialized = 1;
3015 sprintf(name, "PCI%04x", hose->global_number);
3016 phb->dbgfs = debugfs_create_dir(name, powerpc_debugfs_root);
3018 pr_warning("%s: Error on creating debugfs on PHB#%x\n",
3019 __func__, hose->global_number);
3021 #endif /* CONFIG_DEBUG_FS */
3024 static void pnv_pci_ioda_fixup(void)
3026 pnv_pci_ioda_setup_PEs();
3027 pnv_pci_ioda_setup_iommu_api();
3028 pnv_pci_ioda_create_dbgfs();
3032 eeh_addr_cache_build();
3037 * Returns the alignment for I/O or memory windows for P2P
3038 * bridges. That actually depends on how PEs are segmented.
3039 * For now, we return I/O or M32 segment size for PE sensitive
3040 * P2P bridges. Otherwise, the default values (4KiB for I/O,
3041 * 1MiB for memory) will be returned.
3043 * The current PCI bus might be put into one PE, which was
3044 * create against the parent PCI bridge. For that case, we
3045 * needn't enlarge the alignment so that we can save some
3048 static resource_size_t pnv_pci_window_alignment(struct pci_bus *bus,
3051 struct pci_dev *bridge;
3052 struct pci_controller *hose = pci_bus_to_host(bus);
3053 struct pnv_phb *phb = hose->private_data;
3054 int num_pci_bridges = 0;
3058 if (pci_pcie_type(bridge) == PCI_EXP_TYPE_PCI_BRIDGE) {
3060 if (num_pci_bridges >= 2)
3064 bridge = bridge->bus->self;
3067 /* We fail back to M32 if M64 isn't supported */
3068 if (phb->ioda.m64_segsize &&
3069 pnv_pci_is_mem_pref_64(type))
3070 return phb->ioda.m64_segsize;
3071 if (type & IORESOURCE_MEM)
3072 return phb->ioda.m32_segsize;
3074 return phb->ioda.io_segsize;
3078 * We are updating root port or the upstream port of the
3079 * bridge behind the root port with PHB's windows in order
3080 * to accommodate the changes on required resources during
3081 * PCI (slot) hotplug, which is connected to either root
3082 * port or the downstream ports of PCIe switch behind the
3085 static void pnv_pci_fixup_bridge_resources(struct pci_bus *bus,
3088 struct pci_controller *hose = pci_bus_to_host(bus);
3089 struct pnv_phb *phb = hose->private_data;
3090 struct pci_dev *bridge = bus->self;
3091 struct resource *r, *w;
3092 bool msi_region = false;
3095 /* Check if we need apply fixup to the bridge's windows */
3096 if (!pci_is_root_bus(bridge->bus) &&
3097 !pci_is_root_bus(bridge->bus->self->bus))
3100 /* Fixup the resources */
3101 for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++) {
3102 r = &bridge->resource[PCI_BRIDGE_RESOURCES + i];
3103 if (!r->flags || !r->parent)
3107 if (r->flags & type & IORESOURCE_IO)
3108 w = &hose->io_resource;
3109 else if (pnv_pci_is_mem_pref_64(r->flags) &&
3110 (type & IORESOURCE_PREFETCH) &&
3111 phb->ioda.m64_segsize)
3112 w = &hose->mem_resources[1];
3113 else if (r->flags & type & IORESOURCE_MEM) {
3114 w = &hose->mem_resources[0];
3118 r->start = w->start;
3121 /* The 64KB 32-bits MSI region shouldn't be included in
3122 * the 32-bits bridge window. Otherwise, we can see strange
3123 * issues. One of them is EEH error observed on Garrison.
3125 * Exclude top 1MB region which is the minimal alignment of
3126 * 32-bits bridge window.
3135 static void pnv_pci_setup_bridge(struct pci_bus *bus, unsigned long type)
3137 struct pci_controller *hose = pci_bus_to_host(bus);
3138 struct pnv_phb *phb = hose->private_data;
3139 struct pci_dev *bridge = bus->self;
3140 struct pnv_ioda_pe *pe;
3141 bool all = (pci_pcie_type(bridge) == PCI_EXP_TYPE_PCI_BRIDGE);
3143 /* Extend bridge's windows if necessary */
3144 pnv_pci_fixup_bridge_resources(bus, type);
3146 /* The PE for root bus should be realized before any one else */
3147 if (!phb->ioda.root_pe_populated) {
3148 pe = pnv_ioda_setup_bus_PE(phb->hose->bus, false);
3150 phb->ioda.root_pe_idx = pe->pe_number;
3151 phb->ioda.root_pe_populated = true;
3155 /* Don't assign PE to PCI bus, which doesn't have subordinate devices */
3156 if (list_empty(&bus->devices))
3159 /* Reserve PEs according to used M64 resources */
3160 if (phb->reserve_m64_pe)
3161 phb->reserve_m64_pe(bus, NULL, all);
3164 * Assign PE. We might run here because of partial hotplug.
3165 * For the case, we just pick up the existing PE and should
3166 * not allocate resources again.
3168 pe = pnv_ioda_setup_bus_PE(bus, all);
3172 pnv_ioda_setup_pe_seg(pe);
3173 switch (phb->type) {
3175 pnv_pci_ioda1_setup_dma_pe(phb, pe);
3178 pnv_pci_ioda2_setup_dma_pe(phb, pe);
3181 pr_warn("%s: No DMA for PHB#%d (type %d)\n",
3182 __func__, phb->hose->global_number, phb->type);
3186 #ifdef CONFIG_PCI_IOV
3187 static resource_size_t pnv_pci_iov_resource_alignment(struct pci_dev *pdev,
3190 struct pci_controller *hose = pci_bus_to_host(pdev->bus);
3191 struct pnv_phb *phb = hose->private_data;
3192 struct pci_dn *pdn = pci_get_pdn(pdev);
3193 resource_size_t align;
3196 * On PowerNV platform, IOV BAR is mapped by M64 BAR to enable the
3197 * SR-IOV. While from hardware perspective, the range mapped by M64
3198 * BAR should be size aligned.
3200 * When IOV BAR is mapped with M64 BAR in Single PE mode, the extra
3201 * powernv-specific hardware restriction is gone. But if just use the
3202 * VF BAR size as the alignment, PF BAR / VF BAR may be allocated with
3203 * in one segment of M64 #15, which introduces the PE conflict between
3204 * PF and VF. Based on this, the minimum alignment of an IOV BAR is
3207 * This function returns the total IOV BAR size if M64 BAR is in
3208 * Shared PE mode or just VF BAR size if not.
3209 * If the M64 BAR is in Single PE mode, return the VF BAR size or
3210 * M64 segment size if IOV BAR size is less.
3212 align = pci_iov_resource_size(pdev, resno);
3213 if (!pdn->vfs_expanded)
3215 if (pdn->m64_single_mode)
3216 return max(align, (resource_size_t)phb->ioda.m64_segsize);
3218 return pdn->vfs_expanded * align;
3220 #endif /* CONFIG_PCI_IOV */
3222 /* Prevent enabling devices for which we couldn't properly
3225 bool pnv_pci_enable_device_hook(struct pci_dev *dev)
3227 struct pci_controller *hose = pci_bus_to_host(dev->bus);
3228 struct pnv_phb *phb = hose->private_data;
3231 /* The function is probably called while the PEs have
3232 * not be created yet. For example, resource reassignment
3233 * during PCI probe period. We just skip the check if
3236 if (!phb->initialized)
3239 pdn = pci_get_pdn(dev);
3240 if (!pdn || pdn->pe_number == IODA_INVALID_PE)
3246 static long pnv_pci_ioda1_unset_window(struct iommu_table_group *table_group,
3249 struct pnv_ioda_pe *pe = container_of(table_group,
3250 struct pnv_ioda_pe, table_group);
3251 struct pnv_phb *phb = pe->phb;
3255 pe_info(pe, "Removing DMA window #%d\n", num);
3256 for (idx = 0; idx < phb->ioda.dma32_count; idx++) {
3257 if (phb->ioda.dma32_segmap[idx] != pe->pe_number)
3260 rc = opal_pci_map_pe_dma_window(phb->opal_id, pe->pe_number,
3261 idx, 0, 0ul, 0ul, 0ul);
3262 if (rc != OPAL_SUCCESS) {
3263 pe_warn(pe, "Failure %ld unmapping DMA32 segment#%d\n",
3268 phb->ioda.dma32_segmap[idx] = IODA_INVALID_PE;
3271 pnv_pci_unlink_table_and_group(table_group->tables[num], table_group);
3272 return OPAL_SUCCESS;
3275 static void pnv_pci_ioda1_release_pe_dma(struct pnv_ioda_pe *pe)
3277 unsigned int weight = pnv_pci_ioda_pe_dma_weight(pe);
3278 struct iommu_table *tbl = pe->table_group.tables[0];
3284 rc = pnv_pci_ioda1_unset_window(&pe->table_group, 0);
3285 if (rc != OPAL_SUCCESS)
3288 pnv_pci_ioda1_tce_invalidate(tbl, tbl->it_offset, tbl->it_size, false);
3289 if (pe->table_group.group) {
3290 iommu_group_put(pe->table_group.group);
3291 WARN_ON(pe->table_group.group);
3294 free_pages(tbl->it_base, get_order(tbl->it_size << 3));
3295 iommu_free_table(tbl, "pnv");
3298 static void pnv_pci_ioda2_release_pe_dma(struct pnv_ioda_pe *pe)
3300 struct iommu_table *tbl = pe->table_group.tables[0];
3301 unsigned int weight = pnv_pci_ioda_pe_dma_weight(pe);
3302 #ifdef CONFIG_IOMMU_API
3309 #ifdef CONFIG_IOMMU_API
3310 rc = pnv_pci_ioda2_unset_window(&pe->table_group, 0);
3312 pe_warn(pe, "OPAL error %ld release DMA window\n", rc);
3315 pnv_pci_ioda2_set_bypass(pe, false);
3316 if (pe->table_group.group) {
3317 iommu_group_put(pe->table_group.group);
3318 WARN_ON(pe->table_group.group);
3321 pnv_pci_ioda2_table_free_pages(tbl);
3322 iommu_free_table(tbl, "pnv");
3325 static void pnv_ioda_free_pe_seg(struct pnv_ioda_pe *pe,
3329 struct pnv_phb *phb = pe->phb;
3333 for (idx = 0; idx < phb->ioda.total_pe_num; idx++) {
3334 if (map[idx] != pe->pe_number)
3337 if (win == OPAL_M64_WINDOW_TYPE)
3338 rc = opal_pci_map_pe_mmio_window(phb->opal_id,
3339 phb->ioda.reserved_pe_idx, win,
3340 idx / PNV_IODA1_M64_SEGS,
3341 idx % PNV_IODA1_M64_SEGS);
3343 rc = opal_pci_map_pe_mmio_window(phb->opal_id,
3344 phb->ioda.reserved_pe_idx, win, 0, idx);
3346 if (rc != OPAL_SUCCESS)
3347 pe_warn(pe, "Error %ld unmapping (%d) segment#%d\n",
3350 map[idx] = IODA_INVALID_PE;
3354 static void pnv_ioda_release_pe_seg(struct pnv_ioda_pe *pe)
3356 struct pnv_phb *phb = pe->phb;
3358 if (phb->type == PNV_PHB_IODA1) {
3359 pnv_ioda_free_pe_seg(pe, OPAL_IO_WINDOW_TYPE,
3360 phb->ioda.io_segmap);
3361 pnv_ioda_free_pe_seg(pe, OPAL_M32_WINDOW_TYPE,
3362 phb->ioda.m32_segmap);
3363 pnv_ioda_free_pe_seg(pe, OPAL_M64_WINDOW_TYPE,
3364 phb->ioda.m64_segmap);
3365 } else if (phb->type == PNV_PHB_IODA2) {
3366 pnv_ioda_free_pe_seg(pe, OPAL_M32_WINDOW_TYPE,
3367 phb->ioda.m32_segmap);
3371 static void pnv_ioda_release_pe(struct pnv_ioda_pe *pe)
3373 struct pnv_phb *phb = pe->phb;
3374 struct pnv_ioda_pe *slave, *tmp;
3376 /* Release slave PEs in compound PE */
3377 if (pe->flags & PNV_IODA_PE_MASTER) {
3378 list_for_each_entry_safe(slave, tmp, &pe->slaves, list)
3379 pnv_ioda_release_pe(slave);
3382 list_del(&pe->list);
3383 switch (phb->type) {
3385 pnv_pci_ioda1_release_pe_dma(pe);
3388 pnv_pci_ioda2_release_pe_dma(pe);
3394 pnv_ioda_release_pe_seg(pe);
3395 pnv_ioda_deconfigure_pe(pe->phb, pe);
3396 pnv_ioda_free_pe(pe);
3399 static void pnv_pci_release_device(struct pci_dev *pdev)
3401 struct pci_controller *hose = pci_bus_to_host(pdev->bus);
3402 struct pnv_phb *phb = hose->private_data;
3403 struct pci_dn *pdn = pci_get_pdn(pdev);
3404 struct pnv_ioda_pe *pe;
3406 if (pdev->is_virtfn)
3409 if (!pdn || pdn->pe_number == IODA_INVALID_PE)
3412 pe = &phb->ioda.pe_array[pdn->pe_number];
3413 WARN_ON(--pe->device_count < 0);
3414 if (pe->device_count == 0)
3415 pnv_ioda_release_pe(pe);
3418 static void pnv_pci_ioda_shutdown(struct pci_controller *hose)
3420 struct pnv_phb *phb = hose->private_data;
3422 opal_pci_reset(phb->opal_id, OPAL_RESET_PCI_IODA_TABLE,
3426 static const struct pci_controller_ops pnv_pci_ioda_controller_ops = {
3427 .dma_dev_setup = pnv_pci_dma_dev_setup,
3428 .dma_bus_setup = pnv_pci_dma_bus_setup,
3429 #ifdef CONFIG_PCI_MSI
3430 .setup_msi_irqs = pnv_setup_msi_irqs,
3431 .teardown_msi_irqs = pnv_teardown_msi_irqs,
3433 .enable_device_hook = pnv_pci_enable_device_hook,
3434 .release_device = pnv_pci_release_device,
3435 .window_alignment = pnv_pci_window_alignment,
3436 .setup_bridge = pnv_pci_setup_bridge,
3437 .reset_secondary_bus = pnv_pci_reset_secondary_bus,
3438 .dma_set_mask = pnv_pci_ioda_dma_set_mask,
3439 .dma_get_required_mask = pnv_pci_ioda_dma_get_required_mask,
3440 .shutdown = pnv_pci_ioda_shutdown,
3443 static int pnv_npu_dma_set_mask(struct pci_dev *npdev, u64 dma_mask)
3445 dev_err_once(&npdev->dev,
3446 "%s operation unsupported for NVLink devices\n",
3451 static const struct pci_controller_ops pnv_npu_ioda_controller_ops = {
3452 .dma_dev_setup = pnv_pci_dma_dev_setup,
3453 #ifdef CONFIG_PCI_MSI
3454 .setup_msi_irqs = pnv_setup_msi_irqs,
3455 .teardown_msi_irqs = pnv_teardown_msi_irqs,
3457 .enable_device_hook = pnv_pci_enable_device_hook,
3458 .window_alignment = pnv_pci_window_alignment,
3459 .reset_secondary_bus = pnv_pci_reset_secondary_bus,
3460 .dma_set_mask = pnv_npu_dma_set_mask,
3461 .shutdown = pnv_pci_ioda_shutdown,
3464 #ifdef CONFIG_CXL_BASE
3465 const struct pci_controller_ops pnv_cxl_cx4_ioda_controller_ops = {
3466 .dma_dev_setup = pnv_pci_dma_dev_setup,
3467 .dma_bus_setup = pnv_pci_dma_bus_setup,
3468 #ifdef CONFIG_PCI_MSI
3469 .setup_msi_irqs = pnv_cxl_cx4_setup_msi_irqs,
3470 .teardown_msi_irqs = pnv_cxl_cx4_teardown_msi_irqs,
3472 .enable_device_hook = pnv_cxl_enable_device_hook,
3473 .disable_device = pnv_cxl_disable_device,
3474 .release_device = pnv_pci_release_device,
3475 .window_alignment = pnv_pci_window_alignment,
3476 .setup_bridge = pnv_pci_setup_bridge,
3477 .reset_secondary_bus = pnv_pci_reset_secondary_bus,
3478 .dma_set_mask = pnv_pci_ioda_dma_set_mask,
3479 .dma_get_required_mask = pnv_pci_ioda_dma_get_required_mask,
3480 .shutdown = pnv_pci_ioda_shutdown,
3484 static void __init pnv_pci_init_ioda_phb(struct device_node *np,
3485 u64 hub_id, int ioda_type)
3487 struct pci_controller *hose;
3488 struct pnv_phb *phb;
3489 unsigned long size, m64map_off, m32map_off, pemap_off;
3490 unsigned long iomap_off = 0, dma32map_off = 0;
3491 const __be64 *prop64;
3492 const __be32 *prop32;
3499 pr_info("Initializing %s PHB (%s)\n",
3500 pnv_phb_names[ioda_type], of_node_full_name(np));
3502 prop64 = of_get_property(np, "ibm,opal-phbid", NULL);
3504 pr_err(" Missing \"ibm,opal-phbid\" property !\n");
3507 phb_id = be64_to_cpup(prop64);
3508 pr_debug(" PHB-ID : 0x%016llx\n", phb_id);
3510 phb = memblock_virt_alloc(sizeof(struct pnv_phb), 0);
3512 /* Allocate PCI controller */
3513 phb->hose = hose = pcibios_alloc_controller(np);
3515 pr_err(" Can't allocate PCI controller for %s\n",
3517 memblock_free(__pa(phb), sizeof(struct pnv_phb));
3521 spin_lock_init(&phb->lock);
3522 prop32 = of_get_property(np, "bus-range", &len);
3523 if (prop32 && len == 8) {
3524 hose->first_busno = be32_to_cpu(prop32[0]);
3525 hose->last_busno = be32_to_cpu(prop32[1]);
3527 pr_warn(" Broken <bus-range> on %s\n", np->full_name);
3528 hose->first_busno = 0;
3529 hose->last_busno = 0xff;
3531 hose->private_data = phb;
3532 phb->hub_id = hub_id;
3533 phb->opal_id = phb_id;
3534 phb->type = ioda_type;
3535 mutex_init(&phb->ioda.pe_alloc_mutex);
3537 /* Detect specific models for error handling */
3538 if (of_device_is_compatible(np, "ibm,p7ioc-pciex"))
3539 phb->model = PNV_PHB_MODEL_P7IOC;
3540 else if (of_device_is_compatible(np, "ibm,power8-pciex"))
3541 phb->model = PNV_PHB_MODEL_PHB3;
3542 else if (of_device_is_compatible(np, "ibm,power8-npu-pciex"))
3543 phb->model = PNV_PHB_MODEL_NPU;
3545 phb->model = PNV_PHB_MODEL_UNKNOWN;
3547 /* Parse 32-bit and IO ranges (if any) */
3548 pci_process_bridge_OF_ranges(hose, np, !hose->global_number);
3551 phb->regs = of_iomap(np, 0);
3552 if (phb->regs == NULL)
3553 pr_err(" Failed to map registers !\n");
3555 /* Initialize TCE kill register */
3556 pnv_pci_ioda_setup_opal_tce_kill(phb);
3558 /* Initialize more IODA stuff */
3559 phb->ioda.total_pe_num = 1;
3560 prop32 = of_get_property(np, "ibm,opal-num-pes", NULL);
3562 phb->ioda.total_pe_num = be32_to_cpup(prop32);
3563 prop32 = of_get_property(np, "ibm,opal-reserved-pe", NULL);
3565 phb->ioda.reserved_pe_idx = be32_to_cpup(prop32);
3567 /* Invalidate RID to PE# mapping */
3568 for (segno = 0; segno < ARRAY_SIZE(phb->ioda.pe_rmap); segno++)
3569 phb->ioda.pe_rmap[segno] = IODA_INVALID_PE;
3571 /* Parse 64-bit MMIO range */
3572 pnv_ioda_parse_m64_window(phb);
3574 phb->ioda.m32_size = resource_size(&hose->mem_resources[0]);
3575 /* FW Has already off top 64k of M32 space (MSI space) */
3576 phb->ioda.m32_size += 0x10000;
3578 phb->ioda.m32_segsize = phb->ioda.m32_size / phb->ioda.total_pe_num;
3579 phb->ioda.m32_pci_base = hose->mem_resources[0].start - hose->mem_offset[0];
3580 phb->ioda.io_size = hose->pci_io_size;
3581 phb->ioda.io_segsize = phb->ioda.io_size / phb->ioda.total_pe_num;
3582 phb->ioda.io_pci_base = 0; /* XXX calculate this ? */
3584 /* Calculate how many 32-bit TCE segments we have */
3585 phb->ioda.dma32_count = phb->ioda.m32_pci_base /
3586 PNV_IODA1_DMA32_SEGSIZE;
3588 /* Allocate aux data & arrays. We don't have IO ports on PHB3 */
3589 size = _ALIGN_UP(max_t(unsigned, phb->ioda.total_pe_num, 8) / 8,
3590 sizeof(unsigned long));
3592 size += phb->ioda.total_pe_num * sizeof(phb->ioda.m64_segmap[0]);
3594 size += phb->ioda.total_pe_num * sizeof(phb->ioda.m32_segmap[0]);
3595 if (phb->type == PNV_PHB_IODA1) {
3597 size += phb->ioda.total_pe_num * sizeof(phb->ioda.io_segmap[0]);
3598 dma32map_off = size;
3599 size += phb->ioda.dma32_count *
3600 sizeof(phb->ioda.dma32_segmap[0]);
3603 size += phb->ioda.total_pe_num * sizeof(struct pnv_ioda_pe);
3604 aux = memblock_virt_alloc(size, 0);
3605 phb->ioda.pe_alloc = aux;
3606 phb->ioda.m64_segmap = aux + m64map_off;
3607 phb->ioda.m32_segmap = aux + m32map_off;
3608 for (segno = 0; segno < phb->ioda.total_pe_num; segno++) {
3609 phb->ioda.m64_segmap[segno] = IODA_INVALID_PE;
3610 phb->ioda.m32_segmap[segno] = IODA_INVALID_PE;
3612 if (phb->type == PNV_PHB_IODA1) {
3613 phb->ioda.io_segmap = aux + iomap_off;
3614 for (segno = 0; segno < phb->ioda.total_pe_num; segno++)
3615 phb->ioda.io_segmap[segno] = IODA_INVALID_PE;
3617 phb->ioda.dma32_segmap = aux + dma32map_off;
3618 for (segno = 0; segno < phb->ioda.dma32_count; segno++)
3619 phb->ioda.dma32_segmap[segno] = IODA_INVALID_PE;
3621 phb->ioda.pe_array = aux + pemap_off;
3624 * Choose PE number for root bus, which shouldn't have
3625 * M64 resources consumed by its child devices. To pick
3626 * the PE number adjacent to the reserved one if possible.
3628 pnv_ioda_reserve_pe(phb, phb->ioda.reserved_pe_idx);
3629 if (phb->ioda.reserved_pe_idx == 0) {
3630 phb->ioda.root_pe_idx = 1;
3631 pnv_ioda_reserve_pe(phb, phb->ioda.root_pe_idx);
3632 } else if (phb->ioda.reserved_pe_idx == (phb->ioda.total_pe_num - 1)) {
3633 phb->ioda.root_pe_idx = phb->ioda.reserved_pe_idx - 1;
3634 pnv_ioda_reserve_pe(phb, phb->ioda.root_pe_idx);
3636 phb->ioda.root_pe_idx = IODA_INVALID_PE;
3639 INIT_LIST_HEAD(&phb->ioda.pe_list);
3640 mutex_init(&phb->ioda.pe_list_mutex);
3642 /* Calculate how many 32-bit TCE segments we have */
3643 phb->ioda.dma32_count = phb->ioda.m32_pci_base /
3644 PNV_IODA1_DMA32_SEGSIZE;
3646 #if 0 /* We should really do that ... */
3647 rc = opal_pci_set_phb_mem_window(opal->phb_id,
3650 starting_real_address,
3651 starting_pci_address,
3655 pr_info(" %03d (%03d) PE's M32: 0x%x [segment=0x%x]\n",
3656 phb->ioda.total_pe_num, phb->ioda.reserved_pe_idx,
3657 phb->ioda.m32_size, phb->ioda.m32_segsize);
3658 if (phb->ioda.m64_size)
3659 pr_info(" M64: 0x%lx [segment=0x%lx]\n",
3660 phb->ioda.m64_size, phb->ioda.m64_segsize);
3661 if (phb->ioda.io_size)
3662 pr_info(" IO: 0x%x [segment=0x%x]\n",
3663 phb->ioda.io_size, phb->ioda.io_segsize);
3666 phb->hose->ops = &pnv_pci_ops;
3667 phb->get_pe_state = pnv_ioda_get_pe_state;
3668 phb->freeze_pe = pnv_ioda_freeze_pe;
3669 phb->unfreeze_pe = pnv_ioda_unfreeze_pe;
3671 /* Setup MSI support */
3672 pnv_pci_init_ioda_msis(phb);
3675 * We pass the PCI probe flag PCI_REASSIGN_ALL_RSRC here
3676 * to let the PCI core do resource assignment. It's supposed
3677 * that the PCI core will do correct I/O and MMIO alignment
3678 * for the P2P bridge bars so that each PCI bus (excluding
3679 * the child P2P bridges) can form individual PE.
3681 ppc_md.pcibios_fixup = pnv_pci_ioda_fixup;
3683 if (phb->type == PNV_PHB_NPU) {
3684 hose->controller_ops = pnv_npu_ioda_controller_ops;
3686 phb->dma_dev_setup = pnv_pci_ioda_dma_dev_setup;
3687 hose->controller_ops = pnv_pci_ioda_controller_ops;
3690 #ifdef CONFIG_PCI_IOV
3691 ppc_md.pcibios_fixup_sriov = pnv_pci_ioda_fixup_iov_resources;
3692 ppc_md.pcibios_iov_resource_alignment = pnv_pci_iov_resource_alignment;
3695 pci_add_flags(PCI_REASSIGN_ALL_RSRC);
3697 /* Reset IODA tables to a clean state */
3698 rc = opal_pci_reset(phb_id, OPAL_RESET_PCI_IODA_TABLE, OPAL_ASSERT_RESET);
3700 pr_warning(" OPAL Error %ld performing IODA table reset !\n", rc);
3702 /* If we're running in kdump kerenl, the previous kerenl never
3703 * shutdown PCI devices correctly. We already got IODA table
3704 * cleaned out. So we have to issue PHB reset to stop all PCI
3705 * transactions from previous kerenl.
3707 if (is_kdump_kernel()) {
3708 pr_info(" Issue PHB reset ...\n");
3709 pnv_eeh_phb_reset(hose, EEH_RESET_FUNDAMENTAL);
3710 pnv_eeh_phb_reset(hose, EEH_RESET_DEACTIVATE);
3713 /* Remove M64 resource if we can't configure it successfully */
3714 if (!phb->init_m64 || phb->init_m64(phb))
3715 hose->mem_resources[1].flags = 0;
3718 void __init pnv_pci_init_ioda2_phb(struct device_node *np)
3720 pnv_pci_init_ioda_phb(np, 0, PNV_PHB_IODA2);
3723 void __init pnv_pci_init_npu_phb(struct device_node *np)
3725 pnv_pci_init_ioda_phb(np, 0, PNV_PHB_NPU);
3728 void __init pnv_pci_init_ioda_hub(struct device_node *np)
3730 struct device_node *phbn;
3731 const __be64 *prop64;
3734 pr_info("Probing IODA IO-Hub %s\n", np->full_name);
3736 prop64 = of_get_property(np, "ibm,opal-hubid", NULL);
3738 pr_err(" Missing \"ibm,opal-hubid\" property !\n");
3741 hub_id = be64_to_cpup(prop64);
3742 pr_devel(" HUB-ID : 0x%016llx\n", hub_id);
3744 /* Count child PHBs */
3745 for_each_child_of_node(np, phbn) {
3746 /* Look for IODA1 PHBs */
3747 if (of_device_is_compatible(phbn, "ibm,ioda-phb"))
3748 pnv_pci_init_ioda_phb(phbn, hub_id, PNV_PHB_IODA1);