| // 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); |
| } |
| |
| static int pnv_tce_iommu_bus_notifier(struct notifier_block *nb, |
| unsigned long action, void *data) |
| { |
| struct device *dev = data; |
| |
| switch (action) { |
| case BUS_NOTIFY_DEL_DEVICE: |
| iommu_del_device(dev); |
| return 0; |
| default: |
| return 0; |
| } |
| } |
| |
| static struct notifier_block pnv_tce_iommu_bus_nb = { |
| .notifier_call = pnv_tce_iommu_bus_notifier, |
| }; |
| |
| static int __init pnv_tce_iommu_bus_notifier_init(void) |
| { |
| bus_register_notifier(&pci_bus_type, &pnv_tce_iommu_bus_nb); |
| return 0; |
| } |
| machine_subsys_initcall_sync(powernv, pnv_tce_iommu_bus_notifier_init); |
