diff options
| -rw-r--r-- | arch/powerpc/platforms/powernv/pci-ioda.c | 96 |
1 files changed, 57 insertions, 39 deletions
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index cae7281e4e66..0ddc2e5235d6 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -547,7 +547,7 @@ static void __devinit pnv_ioda_free_pe(struct pnv_phb *phb, int pe) * but in the meantime, we need to protect them to avoid warnings */ #ifdef CONFIG_PCI_MSI -static struct pnv_ioda_pe * __devinit __pnv_ioda_get_one_pe(struct pci_dev *dev) +static struct pnv_ioda_pe * __devinit pnv_ioda_get_pe(struct pci_dev *dev) { struct pci_controller *hose = pci_bus_to_host(dev->bus); struct pnv_phb *phb = hose->private_data; @@ -559,19 +559,6 @@ static struct pnv_ioda_pe * __devinit __pnv_ioda_get_one_pe(struct pci_dev *dev) return NULL; return &phb->ioda.pe_array[pdn->pe_number]; } - -static struct pnv_ioda_pe * __devinit pnv_ioda_get_pe(struct pci_dev *dev) -{ - struct pnv_ioda_pe *pe = __pnv_ioda_get_one_pe(dev); - - while (!pe && dev->bus->self) { - dev = dev->bus->self; - pe = __pnv_ioda_get_one_pe(dev); - if (pe) - pe = pe->bus_pe; - } - return pe; -} #endif /* CONFIG_PCI_MSI */ static int __devinit pnv_ioda_configure_pe(struct pnv_phb *phb, @@ -588,7 +575,11 @@ static int __devinit pnv_ioda_configure_pe(struct pnv_phb *phb, dcomp = OPAL_IGNORE_RID_DEVICE_NUMBER; fcomp = OPAL_IGNORE_RID_FUNCTION_NUMBER; parent = pe->pbus->self; - count = pe->pbus->busn_res.end - pe->pbus->busn_res.start + 1; + if (pe->flags & PNV_IODA_PE_BUS_ALL) + count = pe->pbus->busn_res.end - pe->pbus->busn_res.start + 1; + else + count = 1; + switch(count) { case 1: bcomp = OpalPciBusAll; break; case 2: bcomp = OpalPciBus7Bits; break; @@ -698,6 +689,7 @@ static unsigned int pnv_ioda_dma_weight(struct pci_dev *dev) return 10; } +#if 0 static struct pnv_ioda_pe * __devinit pnv_ioda_setup_dev_PE(struct pci_dev *dev) { struct pci_controller *hose = pci_bus_to_host(dev->bus); @@ -766,6 +758,7 @@ static struct pnv_ioda_pe * __devinit pnv_ioda_setup_dev_PE(struct pci_dev *dev) return pe; } +#endif /* Useful for SRIOV case */ static void pnv_ioda_setup_same_PE(struct pci_bus *bus, struct pnv_ioda_pe *pe) { @@ -783,34 +776,33 @@ static void pnv_ioda_setup_same_PE(struct pci_bus *bus, struct pnv_ioda_pe *pe) pdn->pcidev = dev; pdn->pe_number = pe->pe_number; pe->dma_weight += pnv_ioda_dma_weight(dev); - if (dev->subordinate) + if ((pe->flags & PNV_IODA_PE_BUS_ALL) && dev->subordinate) pnv_ioda_setup_same_PE(dev->subordinate, pe); } } -static void __devinit pnv_ioda_setup_bus_PE(struct pci_dev *dev, - struct pnv_ioda_pe *ppe) +/* + * 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 + * subordinate PCI devices and buses. The second type of PE is normally + * orgiriated by PCIe-to-PCI bridge or PLX switch downstream ports. + */ +static void __devinit pnv_ioda_setup_bus_PE(struct pci_bus *bus, int all) { - struct pci_controller *hose = pci_bus_to_host(dev->bus); + struct pci_controller *hose = pci_bus_to_host(bus); struct pnv_phb *phb = hose->private_data; - struct pci_bus *bus = dev->subordinate; struct pnv_ioda_pe *pe; int pe_num; - if (!bus) { - pr_warning("%s: Bridge without a subordinate bus !\n", - pci_name(dev)); - return; - } pe_num = pnv_ioda_alloc_pe(phb); if (pe_num == IODA_INVALID_PE) { - pr_warning("%s: Not enough PE# available, disabling bus\n", - pci_name(dev)); + pr_warning("%s: Not enough PE# available for PCI bus %04x:%02x\n", + __func__, pci_domain_nr(bus), bus->number); return; } pe = &phb->ioda.pe_array[pe_num]; - ppe->bus_pe = pe; + pe->flags = (all ? PNV_IODA_PE_BUS_ALL : PNV_IODA_PE_BUS); pe->pbus = bus; pe->pdev = NULL; pe->tce32_seg = -1; @@ -818,8 +810,12 @@ static void __devinit pnv_ioda_setup_bus_PE(struct pci_dev *dev, pe->rid = bus->busn_res.start << 8; pe->dma_weight = 0; - pe_info(pe, "Secondary busses %pR associated with PE\n", - &bus->busn_res); + if (all) + pe_info(pe, "Secondary bus %d..%d associated with PE#%d\n", + bus->busn_res.start, bus->busn_res.end, pe_num); + else + pe_info(pe, "Secondary bus %d associated with PE#%d\n", + bus->busn_res.start, pe_num); if (pnv_ioda_configure_pe(phb, pe)) { /* XXX What do we do here ? */ @@ -847,17 +843,33 @@ static void __devinit pnv_ioda_setup_bus_PE(struct pci_dev *dev, static void __devinit pnv_ioda_setup_PEs(struct pci_bus *bus) { struct pci_dev *dev; - struct pnv_ioda_pe *pe; + + pnv_ioda_setup_bus_PE(bus, 0); list_for_each_entry(dev, &bus->devices, bus_list) { - pe = pnv_ioda_setup_dev_PE(dev); - if (pe == NULL) - continue; - /* Leaving the PCIe domain ... single PE# */ - if (pci_pcie_type(dev) == PCI_EXP_TYPE_PCI_BRIDGE) - pnv_ioda_setup_bus_PE(dev, pe); - else if (dev->subordinate) - pnv_ioda_setup_PEs(dev->subordinate); + if (dev->subordinate) { + if (pci_pcie_type(dev) == PCI_EXP_TYPE_PCI_BRIDGE) + pnv_ioda_setup_bus_PE(dev->subordinate, 1); + else + pnv_ioda_setup_PEs(dev->subordinate); + } + } +} + +/* + * Configure PEs so that the downstream PCI buses and devices + * could have their associated PE#. Unfortunately, we didn't + * figure out the way to identify the PLX bridge yet. So we + * simply put the PCI bus and the subordinate behind the root + * port to PE# here. The game rule here is expected to be changed + * as soon as we can detected PLX bridge correctly. + */ +static void __devinit pnv_pci_ioda_setup_PEs(void) +{ + struct pci_controller *hose, *tmp; + + list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { + pnv_ioda_setup_PEs(hose->bus); } } @@ -1138,6 +1150,11 @@ static void __devinit pnv_pci_ioda_fixup_phb(struct pci_controller *hose) } } +static void __devinit pnv_pci_ioda_fixup(void) +{ + pnv_pci_ioda_setup_PEs(); +} + /* * Returns the alignment for I/O or memory windows for P2P * bridges. That actually depends on how PEs are segmented. @@ -1342,6 +1359,7 @@ void __init pnv_pci_init_ioda1_phb(struct device_node *np) * ourselves here */ ppc_md.pcibios_fixup_phb = pnv_pci_ioda_fixup_phb; + ppc_md.pcibios_fixup = pnv_pci_ioda_fixup; ppc_md.pcibios_enable_device_hook = pnv_pci_enable_device_hook; ppc_md.pcibios_window_alignment = pnv_pci_window_alignment; pci_add_flags(PCI_PROBE_ONLY | PCI_REASSIGN_ALL_RSRC); |
