diff options
| -rw-r--r-- | arch/powerpc/platforms/powernv/pci-ioda.c | 81 |
1 files changed, 30 insertions, 51 deletions
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 88d9bdc46373..d9a870355e79 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -51,6 +51,7 @@ static const char * const pnv_phb_names[] = { "IODA1", "IODA2", "NPU_NVLINK", "NPU_OCAPI" }; static void pnv_pci_ioda2_set_bypass(struct pnv_ioda_pe *pe, bool enable); +static void pnv_pci_configure_bus(struct pci_bus *bus); void pe_level_printk(const struct pnv_ioda_pe *pe, const char *level, const char *fmt, ...) @@ -1120,34 +1121,6 @@ static struct pnv_ioda_pe *pnv_ioda_setup_dev_PE(struct pci_dev *dev) return pe; } -static void pnv_ioda_setup_same_PE(struct pci_bus *bus, struct pnv_ioda_pe *pe) -{ - struct pci_dev *dev; - - list_for_each_entry(dev, &bus->devices, bus_list) { - struct pci_dn *pdn = pci_get_pdn(dev); - - if (pdn == NULL) { - pr_warn("%s: No device node associated with device !\n", - pci_name(dev)); - continue; - } - - /* - * In partial hotplug case, the PCI device might be still - * associated with the PE and needn't attach it to the PE - * again. - */ - if (pdn->pe_number != IODA_INVALID_PE) - continue; - - pe->device_count++; - pdn->pe_number = pe->pe_number; - if ((pe->flags & PNV_IODA_PE_BUS_ALL) && dev->subordinate) - pnv_ioda_setup_same_PE(dev->subordinate, pe); - } -} - /* * There're 2 types of PCI bus sensitive PEs: One that is compromised of * single PCI bus. Another one that contains the primary PCI bus and its @@ -1168,7 +1141,6 @@ static struct pnv_ioda_pe *pnv_ioda_setup_bus_PE(struct pci_bus *bus, bool all) pe_num = phb->ioda.pe_rmap[bus->number << 8]; if (pe_num != IODA_INVALID_PE) { pe = &phb->ioda.pe_array[pe_num]; - pnv_ioda_setup_same_PE(bus, pe); return NULL; } @@ -1212,9 +1184,6 @@ static struct pnv_ioda_pe *pnv_ioda_setup_bus_PE(struct pci_bus *bus, bool all) return NULL; } - /* Associate it with all child devices */ - pnv_ioda_setup_same_PE(bus, pe); - /* Put PE to the list */ list_add_tail(&pe->list, &phb->ioda.pe_list); @@ -1772,15 +1741,32 @@ static void pnv_pci_ioda_dma_dev_setup(struct pci_dev *pdev) struct pci_dn *pdn = pci_get_pdn(pdev); struct pnv_ioda_pe *pe; - /* - * The function can be called while the PE# - * hasn't been assigned. Do nothing for the - * case. - */ - if (!pdn || pdn->pe_number == IODA_INVALID_PE) - return; + /* Check if the BDFN for this device is associated with a PE yet */ + pe = pnv_pci_bdfn_to_pe(phb, pdev->devfn | (pdev->bus->number << 8)); + if (!pe) { + /* VF PEs should be pre-configured in pnv_pci_sriov_enable() */ + if (WARN_ON(pdev->is_virtfn)) + return; + + pnv_pci_configure_bus(pdev->bus); + pe = pnv_pci_bdfn_to_pe(phb, pdev->devfn | (pdev->bus->number << 8)); + pci_info(pdev, "Configured PE#%x\n", pe ? pe->pe_number : 0xfffff); + + + /* + * If we can't setup the IODA PE something has gone horribly + * wrong and we can't enable DMA for the device. + */ + if (WARN_ON(!pe)) + return; + } else { + pci_info(pdev, "Added to existing PE#%x\n", pe->pe_number); + } + + if (pdn) + pdn->pe_number = pe->pe_number; + pe->device_count++; - pe = &phb->ioda.pe_array[pdn->pe_number]; WARN_ON(get_dma_ops(&pdev->dev) != &dma_iommu_ops); pdev->dev.archdata.dma_offset = pe->tce_bypass_base; set_iommu_table_base(&pdev->dev, pe->table_group.tables[0]); @@ -2300,9 +2286,6 @@ found: pe->table_group.tce32_size = tbl->it_size << tbl->it_page_shift; iommu_init_table(tbl, phb->hose->node, 0, 0); - if (pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL)) - pnv_ioda_setup_bus_dma(pe, pe->pbus); - return; fail: /* XXX Failure: Try to fallback to 64-bit only ? */ @@ -2633,9 +2616,6 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb, iommu_register_group(&pe->table_group, phb->hose->global_number, pe->pe_number); #endif - - if (pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL)) - pnv_ioda_setup_bus_dma(pe, pe->pbus); } int64_t pnv_opal_pci_msi_eoi(struct irq_chip *chip, unsigned int hw_irq) @@ -3209,16 +3189,15 @@ static void pnv_pci_fixup_bridge_resources(struct pci_bus *bus, } } -static void pnv_pci_setup_bridge(struct pci_bus *bus, unsigned long type) +static void pnv_pci_configure_bus(struct pci_bus *bus) { struct pci_controller *hose = pci_bus_to_host(bus); struct pnv_phb *phb = hose->private_data; struct pci_dev *bridge = bus->self; struct pnv_ioda_pe *pe; - bool all = (pci_pcie_type(bridge) == PCI_EXP_TYPE_PCI_BRIDGE); + bool all = (bridge && pci_pcie_type(bridge) == PCI_EXP_TYPE_PCI_BRIDGE); - /* Extend bridge's windows if necessary */ - pnv_pci_fixup_bridge_resources(bus, type); + dev_info(&bus->dev, "Configuring PE for bus\n"); /* The PE for root bus should be realized before any one else */ if (!phb->ioda.root_pe_populated) { @@ -3593,7 +3572,7 @@ static const struct pci_controller_ops pnv_pci_ioda_controller_ops = { .enable_device_hook = pnv_pci_enable_device_hook, .release_device = pnv_pci_release_device, .window_alignment = pnv_pci_window_alignment, - .setup_bridge = pnv_pci_setup_bridge, + .setup_bridge = pnv_pci_fixup_bridge_resources, .reset_secondary_bus = pnv_pci_reset_secondary_bus, .shutdown = pnv_pci_ioda_shutdown, }; |