From 8ec1e4f1ef974e901b416fef6c3b38a5cc2eeffa Mon Sep 17 00:00:00 2001 From: Daniel Henrique Barboza Date: Thu, 11 Aug 2022 13:39:40 -0300 Subject: [PATCH] ppc/pnv: add phb-id/chip-id PnvPHB3RootBus properties MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit We rely on the phb-id and chip-id, which are PHB properties, to assign chassis and slot to the root port. For default devices this is no big deal: the root port is being created under pnv_phb_realize() and the values are being passed on via the 'index' and 'chip-id' of the pnv_phb_attach_root_port() helper. If we want to implement user created root ports we have a problem. The user created root port will not be aware of which PHB it belongs to, unless we're willing to violate QOM best practices and access the PHB via dev->parent_bus->parent. What we can do is to access the root bus parent bus. Since we're already assigning the root port as QOM child of the bus, and the bus is initiated using PHB properties, let's add phb-id and chip-id as properties of the bus. This will allow us trivial access to them, for both user-created and default root ports, without doing anything too shady with QOM. Reviewed-by: Cédric Le Goater Signed-off-by: Daniel Henrique Barboza Reviewed-by: Frederic Barrat Message-Id: <20220811163950.578927-2-danielhb413@gmail.com> --- hw/pci-host/pnv_phb3.c | 50 ++++++++++++++++++++++++++++++++++ include/hw/pci-host/pnv_phb3.h | 9 +++++- 2 files changed, 58 insertions(+), 1 deletion(-) diff --git a/hw/pci-host/pnv_phb3.c b/hw/pci-host/pnv_phb3.c index d4c04a281a..af8575c007 100644 --- a/hw/pci-host/pnv_phb3.c +++ b/hw/pci-host/pnv_phb3.c @@ -1006,6 +1006,11 @@ void pnv_phb3_bus_init(DeviceState *dev, PnvPHB3 *phb) &phb->pci_mmio, &phb->pci_io, 0, 4, TYPE_PNV_PHB3_ROOT_BUS); + object_property_set_int(OBJECT(pci->bus), "phb-id", phb->phb_id, + &error_abort); + object_property_set_int(OBJECT(pci->bus), "chip-id", phb->chip_id, + &error_abort); + pci_setup_iommu(pci->bus, pnv_phb3_dma_iommu, phb); } @@ -1105,10 +1110,55 @@ static const TypeInfo pnv_phb3_type_info = { .instance_init = pnv_phb3_instance_init, }; +static void pnv_phb3_root_bus_get_prop(Object *obj, Visitor *v, + const char *name, + void *opaque, Error **errp) +{ + PnvPHB3RootBus *bus = PNV_PHB3_ROOT_BUS(obj); + uint64_t value = 0; + + if (strcmp(name, "phb-id") == 0) { + value = bus->phb_id; + } else { + value = bus->chip_id; + } + + visit_type_size(v, name, &value, errp); +} + +static void pnv_phb3_root_bus_set_prop(Object *obj, Visitor *v, + const char *name, + void *opaque, Error **errp) + +{ + PnvPHB3RootBus *bus = PNV_PHB3_ROOT_BUS(obj); + uint64_t value; + + if (!visit_type_size(v, name, &value, errp)) { + return; + } + + if (strcmp(name, "phb-id") == 0) { + bus->phb_id = value; + } else { + bus->chip_id = value; + } +} + static void pnv_phb3_root_bus_class_init(ObjectClass *klass, void *data) { BusClass *k = BUS_CLASS(klass); + object_class_property_add(klass, "phb-id", "int", + pnv_phb3_root_bus_get_prop, + pnv_phb3_root_bus_set_prop, + NULL, NULL); + + object_class_property_add(klass, "chip-id", "int", + pnv_phb3_root_bus_get_prop, + pnv_phb3_root_bus_set_prop, + NULL, NULL); + /* * PHB3 has only a single root complex. Enforce the limit on the * parent bus diff --git a/include/hw/pci-host/pnv_phb3.h b/include/hw/pci-host/pnv_phb3.h index bff69201d9..4854f6d2f6 100644 --- a/include/hw/pci-host/pnv_phb3.h +++ b/include/hw/pci-host/pnv_phb3.h @@ -104,9 +104,16 @@ struct PnvPBCQState { }; /* - * PHB3 PCIe Root port + * PHB3 PCIe Root Bus */ #define TYPE_PNV_PHB3_ROOT_BUS "pnv-phb3-root" +struct PnvPHB3RootBus { + PCIBus parent; + + uint32_t chip_id; + uint32_t phb_id; +}; +OBJECT_DECLARE_SIMPLE_TYPE(PnvPHB3RootBus, PNV_PHB3_ROOT_BUS) /* * PHB3 PCIe Host Bridge for PowerNV machines (POWER8)