// SPDX-License-Identifier: GPL-2.0-or-later /* * Support PCI/PCIe on PowerNV platforms * * Copyright 2011 Benjamin Herrenschmidt, IBM Corp. */ #include <linux/kernel.h> #include <linux/pci.h> #include <linux/delay.h> #include <linux/string.h> #include <linux/init.h> #include <linux/irq.h> #include <linux/io.h> #include <linux/msi.h> #include <linux/iommu.h> #include <linux/sched/mm.h> #include <asm/sections.h> #include <asm/io.h> #include <asm/pci-bridge.h> #include <asm/machdep.h> #include <asm/msi_bitmap.h> #include <asm/ppc-pci.h> #include <asm/pnv-pci.h> #include <asm/opal.h> #include <asm/iommu.h> #include <asm/tce.h> #include <asm/firmware.h> #include <asm/eeh_event.h> #include <asm/eeh.h> #include "powernv.h" #include "pci.h" static DEFINE_MUTEX(tunnel_mutex); int pnv_pci_get_slot_id(struct device_node *np, uint64_t *id) { struct device_node *node = np; u32 bdfn; u64 phbid; int ret; ret = of_property_read_u32(np, "reg", &bdfn); if (ret) return -ENXIO; bdfn = ((bdfn & 0x00ffff00) >> 8); for (node = np; node; node = of_get_parent(node)) { if (!PCI_DN(node)) { of_node_put(node); break; } if (!of_device_is_compatible(node, "ibm,ioda2-phb") && !of_device_is_compatible(node, "ibm,ioda3-phb") && !of_device_is_compatible(node, "ibm,ioda2-npu2-opencapi-phb")) { of_node_put(node); continue; } ret = of_property_read_u64(node, "ibm,opal-phbid", &phbid); if (ret) { of_node_put(node); return -ENXIO; } if (of_device_is_compatible(node, "ibm,ioda2-npu2-opencapi-phb")) *id = PCI_PHB_SLOT_ID(phbid); else *id = PCI_SLOT_ID(phbid, bdfn); return 0; } return -ENODEV; } EXPORT_SYMBOL_GPL(pnv_pci_get_slot_id); int pnv_pci_get_device_tree(uint32_t phandle, void *buf, uint64_t len) { int64_t rc; if (!opal_check_token(OPAL_GET_DEVICE_TREE)) return -ENXIO; rc = opal_get_device_tree(phandle, (uint64_t)buf, len); if (rc < OPAL_SUCCESS) return -EIO; return rc; } EXPORT_SYMBOL_GPL(pnv_pci_get_device_tree); int pnv_pci_get_presence_state(uint64_t id, uint8_t *state) { int64_t rc; if (!opal_check_token(OPAL_PCI_GET_PRESENCE_STATE)) return -ENXIO; rc = opal_pci_get_presence_state(id, (uint64_t)state); if (rc != OPAL_SUCCESS) return -EIO; return 0; } EXPORT_SYMBOL_GPL(pnv_pci_get_presence_state); int pnv_pci_get_power_state(uint64_t id, uint8_t *state) { int64_t rc; if (!opal_check_token(OPAL_PCI_GET_POWER_STATE)) return -ENXIO; rc = opal_pci_get_power_state(id, (uint64_t)state); if (rc != OPAL_SUCCESS) return -EIO; return 0; } EXPORT_SYMBOL_GPL(pnv_pci_get_power_state); int pnv_pci_set_power_state(uint64_t id, uint8_t state, struct opal_msg *msg) { struct opal_msg m; int token, ret; int64_t rc; if (!opal_check_token(OPAL_PCI_SET_POWER_STATE)) return -ENXIO; token = opal_async_get_token_interruptible(); if (unlikely(token < 0)) return token; rc = opal_pci_set_power_state(token, id, (uint64_t)&state); if (rc == OPAL_SUCCESS) { ret = 0; goto exit; } else if (rc != OPAL_ASYNC_COMPLETION) { ret = -EIO; goto exit; } ret = opal_async_wait_response(token, &m); if (ret < 0) goto exit; if (msg) { ret = 1; memcpy(msg, &m, sizeof(m)); } exit: opal_async_release_token(token); return ret; } EXPORT_SYMBOL_GPL(pnv_pci_set_power_state); /* Nicely print the contents of the PE State Tables (PEST). */ static void pnv_pci_dump_pest(__be64 pestA[], __be64 pestB[], int pest_size) { __be64 prevA = ULONG_MAX, prevB = ULONG_MAX; bool dup = false; int i; for (i = 0; i < pest_size; i++) { __be64 peA = be64_to_cpu(pestA[i]); __be64 peB = be64_to_cpu(pestB[i]); if (peA != prevA || peB != prevB) { if (dup) { pr_info("PE[..%03x] A/B: as above\n", i-1); dup = false; } prevA = peA; prevB = peB; if (peA & PNV_IODA_STOPPED_STATE || peB & PNV_IODA_STOPPED_STATE) pr_info("PE[%03x] A/B: %016llx %016llx\n", i, peA, peB); } else if (!dup && (peA & PNV_IODA_STOPPED_STATE || peB & PNV_IODA_STOPPED_STATE)) { dup = true; } } } static void pnv_pci_dump_p7ioc_diag_data(struct pci_controller *hose, struct OpalIoPhbErrorCommon *common) { struct OpalIoP7IOCPhbErrorData *data; data = (struct OpalIoP7IOCPhbErrorData *)common; pr_info("P7IOC PHB#%x Diag-data (Version: %d)\n", hose->global_number, be32_to_cpu(common->version)); if (data->brdgCtl) pr_info("brdgCtl: %08x\n", be32_to_cpu(data->brdgCtl)); if (data->portStatusReg || data->rootCmplxStatus || data->busAgentStatus) pr_info("UtlSts: %08x %08x %08x\n", be32_to_cpu(data->portStatusReg), be32_to_cpu(data->rootCmplxStatus), be32_to_cpu(data->busAgentStatus)); if (data->deviceStatus || data->slotStatus || data->linkStatus || data->devCmdStatus || data->devSecStatus) pr_info("RootSts: %08x %08x %08x %08x %08x\n", be32_to_cpu(data->deviceStatus), be32_to_cpu(data->slotStatus), be32_to_cpu(data->linkStatus), be32_to_cpu(data->devCmdStatus), be32_to_cpu(data->devSecStatus)); if (data->rootErrorStatus || data->uncorrErrorStatus || data->corrErrorStatus) pr_info("RootErrSts: %08x %08x %08x\n", be32_to_cpu(data->rootErrorStatus), be32_to_cpu(data->uncorrErrorStatus), be32_to_cpu(data->corrErrorStatus)); if (data->tlpHdr1 || data->tlpHdr2 || data->tlpHdr3 || data->tlpHdr4) pr_info("RootErrLog: %08x %08x %08x %08x\n", be32_to_cpu(data->tlpHdr1), be32_to_cpu(data->tlpHdr2), be32_to_cpu(data->tlpHdr3), be32_to_cpu(data->tlpHdr4)); if (data->sourceId || data->errorClass || data->correlator) pr_info("RootErrLog1: %08x %016llx %016llx\n", be32_to_cpu(data->sourceId), be64_to_cpu(data->errorClass), be64_to_cpu(data->correlator)); if (data->p7iocPlssr || data->p7iocCsr) pr_info("PhbSts: %016llx %016llx\n", be64_to_cpu(data->p7iocPlssr), be64_to_cpu(data->p7iocCsr)); if (data->lemFir) pr_info("Lem: %016llx %016llx %016llx\n", be64_to_cpu(data->lemFir), be64_to_cpu(data->lemErrorMask), be64_to_cpu(data->lemWOF)); if (data->phbErrorStatus) pr_info("PhbErr: %016llx %016llx %016llx %016llx\n", be64_to_cpu(data->phbErrorStatus), be64_to_cpu(data->phbFirstErrorStatus), be64_to_cpu(data->phbErrorLog0), be64_to_cpu(data->phbErrorLog1)); if (data->mmioErrorStatus) pr_info("OutErr: %016llx %016llx %016llx %016llx\n", be64_to_cpu(data->mmioErrorStatus), be64_to_cpu(data->mmioFirstErrorStatus), be64_to_cpu(data->mmioErrorLog0), be64_to_cpu(data->mmioErrorLog1)); if (data->dma0ErrorStatus) pr_info("InAErr: %016llx %016llx %016llx %016llx\n", be64_to_cpu(data->dma0ErrorStatus), be64_to_cpu(data->dma0FirstErrorStatus), be64_to_cpu(data->dma0ErrorLog0), be64_to_cpu(data->dma0ErrorLog1)); if (data->dma1ErrorStatus) pr_info("InBErr: %016llx %016llx %016llx %016llx\n", be64_to_cpu(data->dma1ErrorStatus), be64_to_cpu(data->dma1FirstErrorStatus), be64_to_cpu(data->dma1ErrorLog0), be64_to_cpu(data->dma1ErrorLog1)); pnv_pci_dump_pest(data->pestA, data->pestB, OPAL_P7IOC_NUM_PEST_REGS); } static void pnv_pci_dump_phb3_diag_data(struct pci_controller *hose, struct OpalIoPhbErrorCommon *common) { struct OpalIoPhb3ErrorData *data; data = (struct OpalIoPhb3ErrorData*)common; pr_info("PHB3 PHB#%x Diag-data (Version: %d)\n", hose->global_number, be32_to_cpu(common->version)); if (data->brdgCtl) pr_info("brdgCtl: %08x\n", be32_to_cpu(data->brdgCtl)); if (data->portStatusReg || data->rootCmplxStatus || data->busAgentStatus) pr_info("UtlSts: %08x %08x %08x\n", be32_to_cpu(data->portStatusReg), be32_to_cpu(data->rootCmplxStatus), be32_to_cpu(data->busAgentStatus)); if (data->deviceStatus || data->slotStatus || data->linkStatus || data->devCmdStatus || data->devSecStatus) pr_info("RootSts: %08x %08x %08x %08x %08x\n", be32_to_cpu(data->deviceStatus), be32_to_cpu(data->slotStatus), be32_to_cpu(data->linkStatus), be32_to_cpu(data->devCmdStatus), be32_to_cpu(data->devSecStatus)); if (data->rootErrorStatus || data->uncorrErrorStatus || data->corrErrorStatus) pr_info("RootErrSts: %08x %08x %08x\n", be32_to_cpu(data->rootErrorStatus), be32_to_cpu(data->uncorrErrorStatus), be32_to_cpu(data->corrErrorStatus)); if (data->tlpHdr1 || data->tlpHdr2 || data->tlpHdr3 || data->tlpHdr4) pr_info("RootErrLog: %08x %08x %08x %08x\n", be32_to_cpu(data->tlpHdr1), be32_to_cpu(data->tlpHdr2), be32_to_cpu(data->tlpHdr3), be32_to_cpu(data->tlpHdr4)); if (data->sourceId || data->errorClass || data->correlator) pr_info("RootErrLog1: %08x %016llx %016llx\n", be32_to_cpu(data->sourceId), be64_to_cpu(data->errorClass), be64_to_cpu(data->correlator)); if (data->nFir) pr_info("nFir: %016llx %016llx %016llx\n", be64_to_cpu(data->nFir), be64_to_cpu(data->nFirMask), be64_to_cpu(data->nFirWOF)); if (data->phbPlssr || data->phbCsr) pr_info("PhbSts: %016llx %016llx\n", be64_to_cpu(data->phbPlssr), be64_to_cpu(data->phbCsr)); if (data->lemFir) pr_info("Lem: %016llx %016llx %016llx\n", be64_to_cpu(data->lemFir), be64_to_cpu(data->lemErrorMask), be64_to_cpu(data->lemWOF)); if (data->phbErrorStatus) pr_info("PhbErr: %016llx %016llx %016llx %016llx\n", be64_to_cpu(data->phbErrorStatus), be64_to_cpu(data->phbFirstErrorStatus), be64_to_cpu(data->phbErrorLog0), be64_to_cpu(data->phbErrorLog1)); if (data->mmioErrorStatus) pr_info("OutErr: %016llx %016llx %016llx %016llx\n", be64_to_cpu(data->mmioErrorStatus), be64_to_cpu(data->mmioFirstErrorStatus), be64_to_cpu(data->mmioErrorLog0), be64_to_cpu(data->mmioErrorLog1)); if (data->dma0ErrorStatus) pr_info("InAErr: %016llx %016llx %016llx %016llx\n", be64_to_cpu(data->dma0ErrorStatus), be64_to_cpu(data->dma0FirstErrorStatus), be64_to_cpu(data->dma0ErrorLog0), be64_to_cpu(data->dma0ErrorLog1)); if (data->dma1ErrorStatus) pr_info("InBErr: %016llx %016llx %016llx %016llx\n", be64_to_cpu(data->dma1ErrorStatus), be64_to_cpu(data->dma1FirstErrorStatus), be64_to_cpu(data->dma1ErrorLog0), be64_to_cpu(data->dma1ErrorLog1)); pnv_pci_dump_pest(data->pestA, data->pestB, OPAL_PHB3_NUM_PEST_REGS); } static void pnv_pci_dump_phb4_diag_data(struct pci_controller *hose, struct OpalIoPhbErrorCommon *common) { struct OpalIoPhb4ErrorData *data; data = (struct OpalIoPhb4ErrorData*)common; pr_info("PHB4 PHB#%d Diag-data (Version: %d)\n", hose->global_number, be32_to_cpu(common->version)); if (data->brdgCtl) pr_info("brdgCtl: %08x\n", be32_to_cpu(data->brdgCtl)); if (data->deviceStatus || data->slotStatus || data->linkStatus || data->devCmdStatus || data->devSecStatus) pr_info("RootSts: %08x %08x %08x %08x %08x\n", be32_to_cpu(data->deviceStatus), be32_to_cpu(data->slotStatus), be32_to_cpu(data->linkStatus), be32_to_cpu(data->devCmdStatus), be32_to_cpu(data->devSecStatus)); if (data->rootErrorStatus || data->uncorrErrorStatus || data->corrErrorStatus) pr_info("RootErrSts: %08x %08x %08x\n", be32_to_cpu(data->rootErrorStatus), be32_to_cpu(data->uncorrErrorStatus), be32_to_cpu(data->corrErrorStatus)); if (data->tlpHdr1 || data->tlpHdr2 || data->tlpHdr3 || data->tlpHdr4) pr_info("RootErrLog: %08x %08x %08x %08x\n", be32_to_cpu(data->tlpHdr1), be32_to_cpu(data->tlpHdr2), be32_to_cpu(data->tlpHdr3), be32_to_cpu(data->tlpHdr4)); if (data->sourceId) pr_info("sourceId: %08x\n", be32_to_cpu(data->sourceId)); if (data->nFir) pr_info("nFir: %016llx %016llx %016llx\n", be64_to_cpu(data->nFir), be64_to_cpu(data->nFirMask), be64_to_cpu(data->nFirWOF)); if (data->phbPlssr || data->phbCsr) pr_info("PhbSts: %016llx %016llx\n", be64_to_cpu(data->phbPlssr), be64_to_cpu(data->phbCsr)); if (data->lemFir) pr_info("Lem: %016llx %016llx %016llx\n", be64_to_cpu(data->lemFir), be64_to_cpu(data->lemErrorMask), be64_to_cpu(data->lemWOF)); if (data->phbErrorStatus) pr_info("PhbErr: %016llx %016llx %016llx %016llx\n", be64_to_cpu(data->phbErrorStatus), be64_to_cpu(data->phbFirstErrorStatus), be64_to_cpu(data->phbErrorLog0), be64_to_cpu(data->phbErrorLog1)); if (data->phbTxeErrorStatus) pr_info("PhbTxeErr: %016llx %016llx %016llx %016llx\n", be64_to_cpu(data->phbTxeErrorStatus), be64_to_cpu(data->phbTxeFirstErrorStatus), be64_to_cpu(data->phbTxeErrorLog0), be64_to_cpu(data->phbTxeErrorLog1)); if (data->phbRxeArbErrorStatus) pr_info("RxeArbErr: %016llx %016llx %016llx %016llx\n", be64_to_cpu(data->phbRxeArbErrorStatus), be64_to_cpu(data->phbRxeArbFirstErrorStatus), be64_to_cpu(data->phbRxeArbErrorLog0), be64_to_cpu(data->phbRxeArbErrorLog1)); if (data->phbRxeMrgErrorStatus) pr_info("RxeMrgErr: %016llx %016llx %016llx %016llx\n", be64_to_cpu(data->phbRxeMrgErrorStatus), be64_to_cpu(data->phbRxeMrgFirstErrorStatus), be64_to_cpu(data->phbRxeMrgErrorLog0), be64_to_cpu(data->phbRxeMrgErrorLog1)); if (data->phbRxeTceErrorStatus) pr_info("RxeTceErr: %016llx %016llx %016llx %016llx\n", be64_to_cpu(data->phbRxeTceErrorStatus), be64_to_cpu(data->phbRxeTceFirstErrorStatus), be64_to_cpu(data->phbRxeTceErrorLog0), be64_to_cpu(data->phbRxeTceErrorLog1)); if (data->phbPblErrorStatus) pr_info("PblErr: %016llx %016llx %016llx %016llx\n", be64_to_cpu(data->phbPblErrorStatus), be64_to_cpu(data->phbPblFirstErrorStatus), be64_to_cpu(data->phbPblErrorLog0), be64_to_cpu(data->phbPblErrorLog1)); if (data->phbPcieDlpErrorStatus) pr_info("PcieDlp: %016llx %016llx %016llx\n", be64_to_cpu(data->phbPcieDlpErrorLog1), be64_to_cpu(data->phbPcieDlpErrorLog2), be64_to_cpu(data->phbPcieDlpErrorStatus)); if (data->phbRegbErrorStatus) pr_info("RegbErr: %016llx %016llx %016llx %016llx\n", be64_to_cpu(data->phbRegbErrorStatus), be64_to_cpu(data->phbRegbFirstErrorStatus), be64_to_cpu(data->phbRegbErrorLog0), be64_to_cpu(data->phbRegbErrorLog1)); pnv_pci_dump_pest(data->pestA, data->pestB, OPAL_PHB4_NUM_PEST_REGS); } void pnv_pci_dump_phb_diag_data(struct pci_controller *hose, unsigned char *log_buff) { struct OpalIoPhbErrorCommon *common; if (!hose || !log_buff) return; common = (struct OpalIoPhbErrorCommon *)log_buff; switch (be32_to_cpu(common->ioType)) { case OPAL_PHB_ERROR_DATA_TYPE_P7IOC: pnv_pci_dump_p7ioc_diag_data(hose, common); break; case OPAL_PHB_ERROR_DATA_TYPE_PHB3: pnv_pci_dump_phb3_diag_data(hose, common); break; case OPAL_PHB_ERROR_DATA_TYPE_PHB4: pnv_pci_dump_phb4_diag_data(hose, common); break; default: pr_warn("%s: Unrecognized ioType %d\n", __func__, be32_to_cpu(common->ioType)); } } static void pnv_pci_handle_eeh_config(struct pnv_phb *phb, u32 pe_no) { unsigned long flags, rc; int has_diag, ret = 0; spin_lock_irqsave(&phb->lock, flags); /* Fetch PHB diag-data */ rc = opal_pci_get_phb_diag_data2(phb->opal_id, phb->diag_data, phb->diag_data_size); has_diag = (rc == OPAL_SUCCESS); /* If PHB supports compound PE, to handle it */ if (phb->unfreeze_pe) { ret = phb->unfreeze_pe(phb, pe_no, OPAL_EEH_ACTION_CLEAR_FREEZE_ALL); } else { rc = opal_pci_eeh_freeze_clear(phb->opal_id, pe_no, OPAL_EEH_ACTION_CLEAR_FREEZE_ALL); if (rc) { pr_warn("%s: Failure %ld clearing frozen " "PHB#%x-PE#%x\n", __func__, rc, phb->hose->global_number, pe_no); ret = -EIO; } } /* * For now, let's only display the diag buffer when we fail to clear * the EEH status. We'll do more sensible things later when we have * proper EEH support. We need to make sure we don't pollute ourselves * with the normal errors generated when probing empty slots */ if (has_diag && ret) pnv_pci_dump_phb_diag_data(phb->hose, phb->diag_data); spin_unlock_irqrestore(&phb->lock, flags); } static void pnv_pci_config_check_eeh(struct pci_dn *pdn) { struct pnv_phb *phb = pdn->phb->private_data; u8 fstate = 0; __be16 pcierr = 0; unsigned int pe_no; s64 rc; /* * Get the PE#. During the PCI probe stage, we might not * setup that yet. So all ER errors should be mapped to * reserved PE. */ pe_no = pdn->pe_number; if (pe_no == IODA_INVALID_PE) { pe_no = phb->ioda.reserved_pe_idx; } /* * Fetch frozen state. If the PHB support compound PE, * we need handle that case. */ if (phb->get_pe_state) { fstate = phb->get_pe_state(phb, pe_no); } else { rc = opal_pci_eeh_freeze_status(phb->opal_id, pe_no, &fstate, &pcierr, NULL); if (rc) { pr_warn("%s: Failure %lld getting PHB#%x-PE#%x state\n", __func__, rc, phb->hose->global_number, pe_no); return; } } pr_devel(" -> EEH check, bdfn=%04x PE#%x fstate=%x\n", (pdn->busno << 8) | (pdn->devfn), pe_no, fstate); /* Clear the frozen state if applicable */ if (fstate == OPAL_EEH_STOPPED_MMIO_FREEZE || fstate == OPAL_EEH_STOPPED_DMA_FREEZE || fstate == OPAL_EEH_STOPPED_MMIO_DMA_FREEZE) { /* * If PHB supports compound PE, freeze it for * consistency. */ if (phb->freeze_pe) phb->freeze_pe(phb, pe_no); pnv_pci_handle_eeh_config(phb, pe_no); } } int pnv_pci_cfg_read(struct pci_dn *pdn, int where, int size, u32 *val) { struct pnv_phb *phb = pdn->phb->private_data; u32 bdfn = (pdn->busno << 8) | pdn->devfn; s64 rc; switch (size) { case 1: { u8 v8; rc = opal_pci_config_read_byte(phb->opal_id, bdfn, where, &v8); *val = (rc == OPAL_SUCCESS) ? v8 : 0xff; break; } case 2: { __be16 v16; rc = opal_pci_config_read_half_word(phb->opal_id, bdfn, where, &v16); *val = (rc == OPAL_SUCCESS) ? be16_to_cpu(v16) : 0xffff; break; } case 4: { __be32 v32; rc = opal_pci_config_read_word(phb->opal_id, bdfn, where, &v32); *val = (rc == OPAL_SUCCESS) ? be32_to_cpu(v32) : 0xffffffff; break; } default: return PCIBIOS_FUNC_NOT_SUPPORTED; } pr_devel("%s: bus: %x devfn: %x +%x/%x -> %08x\n", __func__, pdn->busno, pdn->devfn, where, size, *val); return PCIBIOS_SUCCESSFUL; } int pnv_pci_cfg_write(struct pci_dn *pdn, int where, int size, u32 val) { struct pnv_phb *phb = pdn->phb->private_data; u32 bdfn = (pdn->busno << 8) | pdn->devfn; pr_devel("%s: bus: %x devfn: %x +%x/%x -> %08x\n", __func__, pdn->busno, pdn->devfn, where, size, val); switch (size) { case 1: opal_pci_config_write_byte(phb->opal_id, bdfn, where, val); break; case 2: opal_pci_config_write_half_word(phb->opal_id, bdfn, where, val); break; case 4: opal_pci_config_write_word(phb->opal_id, bdfn, where, val); break; default: return PCIBIOS_FUNC_NOT_SUPPORTED; } return PCIBIOS_SUCCESSFUL; } #ifdef CONFIG_EEH static bool pnv_pci_cfg_check(struct pci_dn *pdn) { struct eeh_dev *edev = NULL; struct pnv_phb *phb = pdn->phb->private_data; /* EEH not enabled ? */ if (!(phb->flags & PNV_PHB_FLAG_EEH)) return true; /* PE reset or device removed ? */ edev = pdn->edev; if (edev) { if (edev->pe && (edev->pe->state & EEH_PE_CFG_BLOCKED)) return false; if (edev->mode & EEH_DEV_REMOVED) return false; } return true; } #else static inline pnv_pci_cfg_check(struct pci_dn *pdn) { return true; } #endif /* CONFIG_EEH */ static int pnv_pci_read_config(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val) { struct pci_dn *pdn; struct pnv_phb *phb; int ret; *val = 0xFFFFFFFF; pdn = pci_get_pdn_by_devfn(bus, devfn); if (!pdn) return PCIBIOS_DEVICE_NOT_FOUND; if (!pnv_pci_cfg_check(pdn)) return PCIBIOS_DEVICE_NOT_FOUND; ret = pnv_pci_cfg_read(pdn, where, size, val); phb = pdn->phb->private_data; if (phb->flags & PNV_PHB_FLAG_EEH && pdn->edev) { if (*val == EEH_IO_ERROR_VALUE(size) && eeh_dev_check_failure(pdn->edev)) return PCIBIOS_DEVICE_NOT_FOUND; } else { pnv_pci_config_check_eeh(pdn); } return ret; } static int pnv_pci_write_config(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val) { struct pci_dn *pdn; struct pnv_phb *phb; int ret; pdn = pci_get_pdn_by_devfn(bus, devfn); if (!pdn) return PCIBIOS_DEVICE_NOT_FOUND; if (!pnv_pci_cfg_check(pdn)) return PCIBIOS_DEVICE_NOT_FOUND; ret = pnv_pci_cfg_write(pdn, where, size, val); phb = pdn->phb->private_data; if (!(phb->flags & PNV_PHB_FLAG_EEH)) pnv_pci_config_check_eeh(pdn); return ret; } struct pci_ops pnv_pci_ops = { .read = pnv_pci_read_config, .write = pnv_pci_write_config, }; struct iommu_table *pnv_pci_table_alloc(int nid) { struct iommu_table *tbl; tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL, nid); if (!tbl) return NULL; INIT_LIST_HEAD_RCU(&tbl->it_group_list); kref_init(&tbl->it_kref); return tbl; } struct device_node *pnv_pci_get_phb_node(struct pci_dev *dev) { struct pci_controller *hose = pci_bus_to_host(dev->bus); return of_node_get(hose->dn); } EXPORT_SYMBOL(pnv_pci_get_phb_node); int pnv_pci_set_tunnel_bar(struct pci_dev *dev, u64 addr, int enable) { struct pnv_phb *phb = pci_bus_to_pnvhb(dev->bus); u64 tunnel_bar; __be64 val; int rc; if (!opal_check_token(OPAL_PCI_GET_PBCQ_TUNNEL_BAR)) return -ENXIO; if (!opal_check_token(OPAL_PCI_SET_PBCQ_TUNNEL_BAR)) return -ENXIO; mutex_lock(&tunnel_mutex); rc = opal_pci_get_pbcq_tunnel_bar(phb->opal_id, &val); if (rc != OPAL_SUCCESS) { rc = -EIO; goto out; } tunnel_bar = be64_to_cpu(val); if (enable) { /* * Only one device per PHB can use atomics. * Our policy is first-come, first-served. */ if (tunnel_bar) { if (tunnel_bar != addr) rc = -EBUSY; else rc = 0; /* Setting same address twice is ok */ goto out; } } else { /* * The device that owns atomics and wants to release * them must pass the same address with enable == 0. */ if (tunnel_bar != addr) { rc = -EPERM; goto out; } addr = 0x0ULL; } rc = opal_pci_set_pbcq_tunnel_bar(phb->opal_id, addr); rc = opal_error_code(rc); out: mutex_unlock(&tunnel_mutex); return rc; } EXPORT_SYMBOL_GPL(pnv_pci_set_tunnel_bar); void pnv_pci_shutdown(void) { struct pci_controller *hose; list_for_each_entry(hose, &hose_list, list_node) if (hose->controller_ops.shutdown) hose->controller_ops.shutdown(hose); } /* Fixup wrong class code in p7ioc and p8 root complex */ static void pnv_p7ioc_rc_quirk(struct pci_dev *dev) { dev->class = PCI_CLASS_BRIDGE_PCI_NORMAL; } DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_IBM, 0x3b9, pnv_p7ioc_rc_quirk); void __init pnv_pci_init(void) { struct device_node *np; pci_add_flags(PCI_CAN_SKIP_ISA_ALIGN); /* If we don't have OPAL, eg. in sim, just skip PCI probe */ if (!firmware_has_feature(FW_FEATURE_OPAL)) return; #ifdef CONFIG_PCIEPORTBUS /* * On PowerNV PCIe devices are (currently) managed in cooperation * with firmware. This isn't *strictly* required, but there's enough * assumptions baked into both firmware and the platform code that * it's unwise to allow the portbus services to be used. * * We need to fix this eventually, but for now set this flag to disable * the portbus driver. The AER service isn't required since that AER * events are handled via EEH. The pciehp hotplug driver can't work * without kernel changes (and portbus binding breaks pnv_php). The * other services also require some thinking about how we're going * to integrate them. */ pcie_ports_disabled = true; #endif /* Look for IODA IO-Hubs. */ for_each_compatible_node(np, NULL, "ibm,ioda-hub") { pnv_pci_init_ioda_hub(np); } /* Look for ioda2 built-in PHB3's */ for_each_compatible_node(np, NULL, "ibm,ioda2-phb") pnv_pci_init_ioda2_phb(np); /* Look for ioda3 built-in PHB4's, we treat them as IODA2 */ for_each_compatible_node(np, NULL, "ibm,ioda3-phb") pnv_pci_init_ioda2_phb(np); /* Look for NPU2 OpenCAPI PHBs */ for_each_compatible_node(np, NULL, "ibm,ioda2-npu2-opencapi-phb") pnv_pci_init_npu2_opencapi_phb(np); /* Configure IOMMU DMA hooks */ set_pci_dma_ops(&dma_iommu_ops); }