powerpc/powernv: Drop PHB operation next_error()

The patch drops PHB EEH operation next_error() and merges its
logic to eeh_ops::next_error().

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 0 insertions, 351 deletions

diff --git a/arch/powerpc/platforms/powernv/eeh-ioda.c b/arch/powerpc/platforms/powernv/eeh-ioda.c
index dc34c36805dc..94d94b4811ad 100644
--- a/arch/powerpc/platforms/powernv/eeh-ioda.c
+++ b/arch/powerpc/platforms/powernv/eeh-ioda.c
@@ -34,18 +34,6 @@
 #include "powernv.h"
 #include "pci.h"
 
-static void ioda_eeh_phb_diag(struct eeh_pe *pe)
-{
-	struct pnv_phb *phb = pe->phb->private_data;
-	long rc;
-
-	rc = opal_pci_get_phb_diag_data2(phb->opal_id, pe->data,
-					 PNV_PCI_DIAG_BUF_SIZE);
-	if (rc != OPAL_SUCCESS)
-		pr_warn("%s: Failed to get diag-data for PHB#%x (%ld)\n",
-			__func__, pe->phb->global_number, rc);
-}
-
 static s64 ioda_eeh_phb_poll(struct pnv_phb *phb)
 {
 	s64 rc = OPAL_HARDWARE;
@@ -280,345 +268,6 @@ static int ioda_eeh_reset(struct eeh_pe *pe, int option)
 	return ret;
 }
 
-static void ioda_eeh_hub_diag_common(struct OpalIoP7IOCErrorData *data)
-{
-	/* GEM */
-	if (data->gemXfir || data->gemRfir ||
-	    data->gemRirqfir || data->gemMask || data->gemRwof)
-		pr_info("  GEM: %016llx %016llx %016llx %016llx %016llx\n",
-			be64_to_cpu(data->gemXfir),
-			be64_to_cpu(data->gemRfir),
-			be64_to_cpu(data->gemRirqfir),
-			be64_to_cpu(data->gemMask),
-			be64_to_cpu(data->gemRwof));
-
-	/* LEM */
-	if (data->lemFir || data->lemErrMask ||
-	    data->lemAction0 || data->lemAction1 || data->lemWof)
-		pr_info("  LEM: %016llx %016llx %016llx %016llx %016llx\n",
-			be64_to_cpu(data->lemFir),
-			be64_to_cpu(data->lemErrMask),
-			be64_to_cpu(data->lemAction0),
-			be64_to_cpu(data->lemAction1),
-			be64_to_cpu(data->lemWof));
-}
-
-static void ioda_eeh_hub_diag(struct pci_controller *hose)
-{
-	struct pnv_phb *phb = hose->private_data;
-	struct OpalIoP7IOCErrorData *data = &phb->diag.hub_diag;
-	long rc;
-
-	rc = opal_pci_get_hub_diag_data(phb->hub_id, data, sizeof(*data));
-	if (rc != OPAL_SUCCESS) {
-		pr_warn("%s: Failed to get HUB#%llx diag-data (%ld)\n",
-			__func__, phb->hub_id, rc);
-		return;
-	}
-
-	switch (data->type) {
-	case OPAL_P7IOC_DIAG_TYPE_RGC:
-		pr_info("P7IOC diag-data for RGC\n\n");
-		ioda_eeh_hub_diag_common(data);
-		if (data->rgc.rgcStatus || data->rgc.rgcLdcp)
-			pr_info("  RGC: %016llx %016llx\n",
-				be64_to_cpu(data->rgc.rgcStatus),
-				be64_to_cpu(data->rgc.rgcLdcp));
-		break;
-	case OPAL_P7IOC_DIAG_TYPE_BI:
-		pr_info("P7IOC diag-data for BI %s\n\n",
-			data->bi.biDownbound ? "Downbound" : "Upbound");
-		ioda_eeh_hub_diag_common(data);
-		if (data->bi.biLdcp0 || data->bi.biLdcp1 ||
-		    data->bi.biLdcp2 || data->bi.biFenceStatus)
-			pr_info("  BI:  %016llx %016llx %016llx %016llx\n",
-				be64_to_cpu(data->bi.biLdcp0),
-				be64_to_cpu(data->bi.biLdcp1),
-				be64_to_cpu(data->bi.biLdcp2),
-				be64_to_cpu(data->bi.biFenceStatus));
-		break;
-	case OPAL_P7IOC_DIAG_TYPE_CI:
-		pr_info("P7IOC diag-data for CI Port %d\n\n",
-			data->ci.ciPort);
-		ioda_eeh_hub_diag_common(data);
-		if (data->ci.ciPortStatus || data->ci.ciPortLdcp)
-			pr_info("  CI:  %016llx %016llx\n",
-				be64_to_cpu(data->ci.ciPortStatus),
-				be64_to_cpu(data->ci.ciPortLdcp));
-		break;
-	case OPAL_P7IOC_DIAG_TYPE_MISC:
-		pr_info("P7IOC diag-data for MISC\n\n");
-		ioda_eeh_hub_diag_common(data);
-		break;
-	case OPAL_P7IOC_DIAG_TYPE_I2C:
-		pr_info("P7IOC diag-data for I2C\n\n");
-		ioda_eeh_hub_diag_common(data);
-		break;
-	default:
-		pr_warn("%s: Invalid type of HUB#%llx diag-data (%d)\n",
-			__func__, phb->hub_id, data->type);
-	}
-}
-
-static int ioda_eeh_get_pe(struct pci_controller *hose,
-			   u16 pe_no, struct eeh_pe **pe)
-{
-	struct pnv_phb *phb = hose->private_data;
-	struct pnv_ioda_pe *pnv_pe;
-	struct eeh_pe *dev_pe;
-	struct eeh_dev edev;
-
-	/*
-	 * If PHB supports compound PE, to fetch
-	 * the master PE because slave PE is invisible
-	 * to EEH core.
-	 */
-	pnv_pe = &phb->ioda.pe_array[pe_no];
-	if (pnv_pe->flags & PNV_IODA_PE_SLAVE) {
-		pnv_pe = pnv_pe->master;
-		WARN_ON(!pnv_pe ||
-			!(pnv_pe->flags & PNV_IODA_PE_MASTER));
-		pe_no = pnv_pe->pe_number;
-	}
-
-	/* Find the PE according to PE# */
-	memset(&edev, 0, sizeof(struct eeh_dev));
-	edev.phb = hose;
-	edev.pe_config_addr = pe_no;
-	dev_pe = eeh_pe_get(&edev);
-	if (!dev_pe)
-		return -EEXIST;
-
-	/* Freeze the (compound) PE */
-	*pe = dev_pe;
-	if (!(dev_pe->state & EEH_PE_ISOLATED))
-		phb->freeze_pe(phb, pe_no);
-
-	/*
-	 * At this point, we're sure the (compound) PE should
-	 * have been frozen. However, we still need poke until
-	 * hitting the frozen PE on top level.
-	 */
-	dev_pe = dev_pe->parent;
-	while (dev_pe && !(dev_pe->type & EEH_PE_PHB)) {
-		int ret;
-		int active_flags = (EEH_STATE_MMIO_ACTIVE |
-				    EEH_STATE_DMA_ACTIVE);
-
-		ret = eeh_ops->get_state(dev_pe, NULL);
-		if (ret <= 0 || (ret & active_flags) == active_flags) {
-			dev_pe = dev_pe->parent;
-			continue;
-		}
-
-		/* Frozen parent PE */
-		*pe = dev_pe;
-		if (!(dev_pe->state & EEH_PE_ISOLATED))
-			phb->freeze_pe(phb, dev_pe->addr);
-
-		/* Next one */
-		dev_pe = dev_pe->parent;
-	}
-
-	return 0;
-}
-
-/**
- * ioda_eeh_next_error - Retrieve next error for EEH core to handle
- * @pe: The affected PE
- *
- * The function is expected to be called by EEH core while it gets
- * special EEH event (without binding PE). The function calls to
- * OPAL APIs for next error to handle. The informational error is
- * handled internally by platform. However, the dead IOC, dead PHB,
- * fenced PHB and frozen PE should be handled by EEH core eventually.
- */
-static int ioda_eeh_next_error(struct eeh_pe **pe)
-{
-	struct pci_controller *hose;
-	struct pnv_phb *phb;
-	struct eeh_pe *phb_pe, *parent_pe;
-	__be64 frozen_pe_no;
-	__be16 err_type, severity;
-	int active_flags = (EEH_STATE_MMIO_ACTIVE | EEH_STATE_DMA_ACTIVE);
-	long rc;
-	int state, ret = EEH_NEXT_ERR_NONE;
-
-	/*
-	 * While running here, it's safe to purge the event queue.
-	 * And we should keep the cached OPAL notifier event sychronized
-	 * between the kernel and firmware.
-	 */
-	eeh_remove_event(NULL, false);
-	opal_notifier_update_evt(OPAL_EVENT_PCI_ERROR, 0x0ul);
-
-	list_for_each_entry(hose, &hose_list, list_node) {
-		/*
-		 * If the subordinate PCI buses of the PHB has been
-		 * removed or is exactly under error recovery, we
-		 * needn't take care of it any more.
-		 */
-		phb = hose->private_data;
-		phb_pe = eeh_phb_pe_get(hose);
-		if (!phb_pe || (phb_pe->state & EEH_PE_ISOLATED))
-			continue;
-
-		rc = opal_pci_next_error(phb->opal_id,
-				&frozen_pe_no, &err_type, &severity);
-
-		/* If OPAL API returns error, we needn't proceed */
-		if (rc != OPAL_SUCCESS) {
-			pr_devel("%s: Invalid return value on "
-				 "PHB#%x (0x%lx) from opal_pci_next_error",
-				 __func__, hose->global_number, rc);
-			continue;
-		}
-
-		/* If the PHB doesn't have error, stop processing */
-		if (be16_to_cpu(err_type) == OPAL_EEH_NO_ERROR ||
-		    be16_to_cpu(severity) == OPAL_EEH_SEV_NO_ERROR) {
-			pr_devel("%s: No error found on PHB#%x\n",
-				 __func__, hose->global_number);
-			continue;
-		}
-
-		/*
-		 * Processing the error. We're expecting the error with
-		 * highest priority reported upon multiple errors on the
-		 * specific PHB.
-		 */
-		pr_devel("%s: Error (%d, %d, %llu) on PHB#%x\n",
-			 __func__, be16_to_cpu(err_type), be16_to_cpu(severity),
-			 be64_to_cpu(frozen_pe_no), hose->global_number);
-		switch (be16_to_cpu(err_type)) {
-		case OPAL_EEH_IOC_ERROR:
-			if (be16_to_cpu(severity) == OPAL_EEH_SEV_IOC_DEAD) {
-				pr_err("EEH: dead IOC detected\n");
-				ret = EEH_NEXT_ERR_DEAD_IOC;
-			} else if (be16_to_cpu(severity) == OPAL_EEH_SEV_INF) {
-				pr_info("EEH: IOC informative error "
-					"detected\n");
-				ioda_eeh_hub_diag(hose);
-				ret = EEH_NEXT_ERR_NONE;
-			}
-
-			break;
-		case OPAL_EEH_PHB_ERROR:
-			if (be16_to_cpu(severity) == OPAL_EEH_SEV_PHB_DEAD) {
-				*pe = phb_pe;
-				pr_err("EEH: dead PHB#%x detected, "
-				       "location: %s\n",
-				       hose->global_number,
-				       eeh_pe_loc_get(phb_pe));
-				ret = EEH_NEXT_ERR_DEAD_PHB;
-			} else if (be16_to_cpu(severity) ==
-						OPAL_EEH_SEV_PHB_FENCED) {
-				*pe = phb_pe;
-				pr_err("EEH: Fenced PHB#%x detected, "
-				       "location: %s\n",
-				       hose->global_number,
-				       eeh_pe_loc_get(phb_pe));
-				ret = EEH_NEXT_ERR_FENCED_PHB;
-			} else if (be16_to_cpu(severity) == OPAL_EEH_SEV_INF) {
-				pr_info("EEH: PHB#%x informative error "
-					"detected, location: %s\n",
-					hose->global_number,
-					eeh_pe_loc_get(phb_pe));
-				ioda_eeh_phb_diag(phb_pe);
-				pnv_pci_dump_phb_diag_data(hose, phb_pe->data);
-				ret = EEH_NEXT_ERR_NONE;
-			}
-
-			break;
-		case OPAL_EEH_PE_ERROR:
-			/*
-			 * If we can't find the corresponding PE, we
-			 * just try to unfreeze.
-			 */
-			if (ioda_eeh_get_pe(hose,
-					    be64_to_cpu(frozen_pe_no), pe)) {
-				/* Try best to clear it */
-				pr_info("EEH: Clear non-existing PHB#%x-PE#%llx\n",
-					hose->global_number, frozen_pe_no);
-				pr_info("EEH: PHB location: %s\n",
-					eeh_pe_loc_get(phb_pe));
-				opal_pci_eeh_freeze_clear(phb->opal_id, frozen_pe_no,
-					OPAL_EEH_ACTION_CLEAR_FREEZE_ALL);
-				ret = EEH_NEXT_ERR_NONE;
-			} else if ((*pe)->state & EEH_PE_ISOLATED ||
-				   eeh_pe_passed(*pe)) {
-				ret = EEH_NEXT_ERR_NONE;
-			} else {
-				pr_err("EEH: Frozen PE#%x on PHB#%x detected\n",
-					(*pe)->addr, (*pe)->phb->global_number);
-				pr_err("EEH: PE location: %s, PHB location: %s\n",
-					eeh_pe_loc_get(*pe), eeh_pe_loc_get(phb_pe));
-				ret = EEH_NEXT_ERR_FROZEN_PE;
-			}
-
-			break;
-		default:
-			pr_warn("%s: Unexpected error type %d\n",
-				__func__, be16_to_cpu(err_type));
-		}
-
-		/*
-		 * EEH core will try recover from fenced PHB or
-		 * frozen PE. In the time for frozen PE, EEH core
-		 * enable IO path for that before collecting logs,
-		 * but it ruins the site. So we have to dump the
-		 * log in advance here.
-		 */
-		if ((ret == EEH_NEXT_ERR_FROZEN_PE  ||
-		    ret == EEH_NEXT_ERR_FENCED_PHB) &&
-		    !((*pe)->state & EEH_PE_ISOLATED)) {
-			eeh_pe_state_mark(*pe, EEH_PE_ISOLATED);
-			ioda_eeh_phb_diag(*pe);
-
-			if (eeh_has_flag(EEH_EARLY_DUMP_LOG))
-				pnv_pci_dump_phb_diag_data((*pe)->phb,
-							   (*pe)->data);
-		}
-
-		/*
-		 * We probably have the frozen parent PE out there and
-		 * we need have to handle frozen parent PE firstly.
-		 */
-		if (ret == EEH_NEXT_ERR_FROZEN_PE) {
-			parent_pe = (*pe)->parent;
-			while (parent_pe) {
-				/* Hit the ceiling ? */
-				if (parent_pe->type & EEH_PE_PHB)
-					break;
-
-				/* Frozen parent PE ? */
-				state = eeh_ops->get_state(parent_pe, NULL);
-				if (state > 0 &&
-				    (state & active_flags) != active_flags)
-					*pe = parent_pe;
-
-				/* Next parent level */
-				parent_pe = parent_pe->parent;
-			}
-
-			/* We possibly migrate to another PE */
-			eeh_pe_state_mark(*pe, EEH_PE_ISOLATED);
-		}
-
-		/*
-		 * If we have no errors on the specific PHB or only
-		 * informative error there, we continue poking it.
-		 * Otherwise, we need actions to be taken by upper
-		 * layer.
-		 */
-		if (ret > EEH_NEXT_ERR_INF)
-			break;
-	}
-
-	return ret;
-}
-
 struct pnv_eeh_ops ioda_eeh_ops = {
 	.reset			= ioda_eeh_reset,
-	.next_error		= ioda_eeh_next_error
 };