From 5ba76b61a2d3c90daa264bbaa14464eb3c49caa9 Mon Sep 17 00:00:00 2001 From: Daniel Henrique Barboza Date: Fri, 24 Jun 2022 05:49:15 -0300 Subject: [PATCH] ppc/pnv: add pnv-phb-root-port device We have two very similar root-port devices, pnv-phb3-root-port and pnv-phb4-root-port. Both consist of a wrapper around the PCIESlot device that, until now, has no additional attributes. The main difference between the PHB3 and PHB4 root ports is that pnv-phb4-root-port has the pnv_phb4_root_port_reset() callback. All other differences can be merged in a single device without too much trouble. This patch introduces the unified pnv-phb-root-port that, in time, will be used as the default root port for the pnv-phb device. Signed-off-by: Daniel Henrique Barboza Reviewed-by: Frederic Barrat Message-Id: <20220624084921.399219-7-danielhb413@gmail.com> --- hw/pci-host/pnv_phb.c | 117 ++++++++++++++++++++++++++++++++++++++---- hw/pci-host/pnv_phb.h | 16 ++++++ 2 files changed, 124 insertions(+), 9 deletions(-) diff --git a/hw/pci-host/pnv_phb.c b/hw/pci-host/pnv_phb.c index abcbcca445..5e61f85614 100644 --- a/hw/pci-host/pnv_phb.c +++ b/hw/pci-host/pnv_phb.c @@ -112,15 +112,114 @@ static void pnv_phb_class_init(ObjectClass *klass, void *data) dc->user_creatable = false; } -static void pnv_phb_register_type(void) +static void pnv_phb_root_port_reset(DeviceState *dev) { - static const TypeInfo pnv_phb_type_info = { - .name = TYPE_PNV_PHB, - .parent = TYPE_PCIE_HOST_BRIDGE, - .instance_size = sizeof(PnvPHB), - .class_init = pnv_phb_class_init, - }; + PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(dev); + PnvPHBRootPort *phb_rp = PNV_PHB_ROOT_PORT(dev); + PCIDevice *d = PCI_DEVICE(dev); + uint8_t *conf = d->config; - type_register_static(&pnv_phb_type_info); + rpc->parent_reset(dev); + + if (phb_rp->version == 3) { + return; + } + + /* PHB4 and later requires these extra reset steps */ + pci_byte_test_and_set_mask(conf + PCI_IO_BASE, + PCI_IO_RANGE_MASK & 0xff); + pci_byte_test_and_clear_mask(conf + PCI_IO_LIMIT, + PCI_IO_RANGE_MASK & 0xff); + pci_set_word(conf + PCI_MEMORY_BASE, 0); + pci_set_word(conf + PCI_MEMORY_LIMIT, 0xfff0); + pci_set_word(conf + PCI_PREF_MEMORY_BASE, 0x1); + pci_set_word(conf + PCI_PREF_MEMORY_LIMIT, 0xfff1); + pci_set_long(conf + PCI_PREF_BASE_UPPER32, 0x1); /* Hack */ + pci_set_long(conf + PCI_PREF_LIMIT_UPPER32, 0xffffffff); + pci_config_set_interrupt_pin(conf, 0); } -type_init(pnv_phb_register_type) + +static void pnv_phb_root_port_realize(DeviceState *dev, Error **errp) +{ + PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(dev); + PnvPHBRootPort *phb_rp = PNV_PHB_ROOT_PORT(dev); + PCIDevice *pci = PCI_DEVICE(dev); + uint16_t device_id = 0; + Error *local_err = NULL; + + rpc->parent_realize(dev, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; + } + + switch (phb_rp->version) { + case 3: + device_id = PNV_PHB3_DEVICE_ID; + break; + case 4: + device_id = PNV_PHB4_DEVICE_ID; + break; + case 5: + device_id = PNV_PHB5_DEVICE_ID; + break; + default: + g_assert_not_reached(); + } + + pci_config_set_device_id(pci->config, device_id); + pci_config_set_interrupt_pin(pci->config, 0); +} + +static Property pnv_phb_root_port_properties[] = { + DEFINE_PROP_UINT32("version", PnvPHBRootPort, version, 0), + + DEFINE_PROP_END_OF_LIST(), +}; + +static void pnv_phb_root_port_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); + PCIERootPortClass *rpc = PCIE_ROOT_PORT_CLASS(klass); + + dc->desc = "IBM PHB PCIE Root Port"; + + device_class_set_props(dc, pnv_phb_root_port_properties); + device_class_set_parent_realize(dc, pnv_phb_root_port_realize, + &rpc->parent_realize); + device_class_set_parent_reset(dc, pnv_phb_root_port_reset, + &rpc->parent_reset); + dc->reset = &pnv_phb_root_port_reset; + dc->user_creatable = false; + + k->vendor_id = PCI_VENDOR_ID_IBM; + /* device_id will be written during realize() */ + k->device_id = 0; + k->revision = 0; + + rpc->exp_offset = 0x48; + rpc->aer_offset = 0x100; +} + +static const TypeInfo pnv_phb_type_info = { + .name = TYPE_PNV_PHB, + .parent = TYPE_PCIE_HOST_BRIDGE, + .instance_size = sizeof(PnvPHB), + .class_init = pnv_phb_class_init, +}; + +static const TypeInfo pnv_phb_root_port_info = { + .name = TYPE_PNV_PHB_ROOT_PORT, + .parent = TYPE_PCIE_ROOT_PORT, + .instance_size = sizeof(PnvPHBRootPort), + .class_init = pnv_phb_root_port_class_init, +}; + +static void pnv_phb_register_types(void) +{ + type_register_static(&pnv_phb_type_info); + type_register_static(&pnv_phb_root_port_info); +} + +type_init(pnv_phb_register_types) diff --git a/hw/pci-host/pnv_phb.h b/hw/pci-host/pnv_phb.h index a7cc8610e2..58ebd6dd0f 100644 --- a/hw/pci-host/pnv_phb.h +++ b/hw/pci-host/pnv_phb.h @@ -36,4 +36,20 @@ struct PnvPHB { #define TYPE_PNV_PHB "pnv-phb" OBJECT_DECLARE_SIMPLE_TYPE(PnvPHB, PNV_PHB) +/* + * PHB PCIe Root port + */ +#define PNV_PHB3_DEVICE_ID 0x03dc +#define PNV_PHB4_DEVICE_ID 0x04c1 +#define PNV_PHB5_DEVICE_ID 0x0652 + +typedef struct PnvPHBRootPort { + PCIESlot parent_obj; + + uint32_t version; +} PnvPHBRootPort; + +#define TYPE_PNV_PHB_ROOT_PORT "pnv-phb-root-port" +OBJECT_DECLARE_SIMPLE_TYPE(PnvPHBRootPort, PNV_PHB_ROOT_PORT) + #endif /* PCI_HOST_PNV_PHB_H */