| /* |
| * QEMU PowerPC PowerNV (POWER9) PHB4 model |
| * |
| * Copyright (c) 2018-2020, IBM Corporation. |
| * |
| * This code is licensed under the GPL version 2 or later. See the |
| * COPYING file in the top-level directory. |
| */ |
| #include "qemu/osdep.h" |
| #include "qapi/error.h" |
| #include "qemu-common.h" |
| #include "qemu/log.h" |
| #include "target/ppc/cpu.h" |
| #include "hw/ppc/fdt.h" |
| #include "hw/pci-host/pnv_phb4_regs.h" |
| #include "hw/pci-host/pnv_phb4.h" |
| #include "hw/ppc/pnv_xscom.h" |
| #include "hw/pci/pci_bridge.h" |
| #include "hw/pci/pci_bus.h" |
| #include "hw/ppc/pnv.h" |
| #include "hw/qdev-properties.h" |
| #include "sysemu/sysemu.h" |
| |
| #include <libfdt.h> |
| |
| #define phb_pec_error(pec, fmt, ...) \ |
| qemu_log_mask(LOG_GUEST_ERROR, "phb4_pec[%d:%d]: " fmt "\n", \ |
| (pec)->chip_id, (pec)->index, ## __VA_ARGS__) |
| |
| |
| static uint64_t pnv_pec_nest_xscom_read(void *opaque, hwaddr addr, |
| unsigned size) |
| { |
| PnvPhb4PecState *pec = PNV_PHB4_PEC(opaque); |
| uint32_t reg = addr >> 3; |
| |
| /* TODO: add list of allowed registers and error out if not */ |
| return pec->nest_regs[reg]; |
| } |
| |
| static void pnv_pec_nest_xscom_write(void *opaque, hwaddr addr, |
| uint64_t val, unsigned size) |
| { |
| PnvPhb4PecState *pec = PNV_PHB4_PEC(opaque); |
| uint32_t reg = addr >> 3; |
| |
| switch (reg) { |
| case PEC_NEST_PBCQ_HW_CONFIG: |
| case PEC_NEST_DROP_PRIO_CTRL: |
| case PEC_NEST_PBCQ_ERR_INJECT: |
| case PEC_NEST_PCI_NEST_CLK_TRACE_CTL: |
| case PEC_NEST_PBCQ_PMON_CTRL: |
| case PEC_NEST_PBCQ_PBUS_ADDR_EXT: |
| case PEC_NEST_PBCQ_PRED_VEC_TIMEOUT: |
| case PEC_NEST_CAPP_CTRL: |
| case PEC_NEST_PBCQ_READ_STK_OVR: |
| case PEC_NEST_PBCQ_WRITE_STK_OVR: |
| case PEC_NEST_PBCQ_STORE_STK_OVR: |
| case PEC_NEST_PBCQ_RETRY_BKOFF_CTRL: |
| pec->nest_regs[reg] = val; |
| break; |
| default: |
| phb_pec_error(pec, "%s @0x%"HWADDR_PRIx"=%"PRIx64"\n", __func__, |
| addr, val); |
| } |
| } |
| |
| static const MemoryRegionOps pnv_pec_nest_xscom_ops = { |
| .read = pnv_pec_nest_xscom_read, |
| .write = pnv_pec_nest_xscom_write, |
| .valid.min_access_size = 8, |
| .valid.max_access_size = 8, |
| .impl.min_access_size = 8, |
| .impl.max_access_size = 8, |
| .endianness = DEVICE_BIG_ENDIAN, |
| }; |
| |
| static uint64_t pnv_pec_pci_xscom_read(void *opaque, hwaddr addr, |
| unsigned size) |
| { |
| PnvPhb4PecState *pec = PNV_PHB4_PEC(opaque); |
| uint32_t reg = addr >> 3; |
| |
| /* TODO: add list of allowed registers and error out if not */ |
| return pec->pci_regs[reg]; |
| } |
| |
| static void pnv_pec_pci_xscom_write(void *opaque, hwaddr addr, |
| uint64_t val, unsigned size) |
| { |
| PnvPhb4PecState *pec = PNV_PHB4_PEC(opaque); |
| uint32_t reg = addr >> 3; |
| |
| switch (reg) { |
| case PEC_PCI_PBAIB_HW_CONFIG: |
| case PEC_PCI_PBAIB_READ_STK_OVR: |
| pec->pci_regs[reg] = val; |
| break; |
| default: |
| phb_pec_error(pec, "%s @0x%"HWADDR_PRIx"=%"PRIx64"\n", __func__, |
| addr, val); |
| } |
| } |
| |
| static const MemoryRegionOps pnv_pec_pci_xscom_ops = { |
| .read = pnv_pec_pci_xscom_read, |
| .write = pnv_pec_pci_xscom_write, |
| .valid.min_access_size = 8, |
| .valid.max_access_size = 8, |
| .impl.min_access_size = 8, |
| .impl.max_access_size = 8, |
| .endianness = DEVICE_BIG_ENDIAN, |
| }; |
| |
| static void pnv_pec_default_phb_realize(PnvPhb4PecState *pec, |
| int stack_no, |
| Error **errp) |
| { |
| PnvPHB4 *phb = PNV_PHB4(qdev_new(TYPE_PNV_PHB4)); |
| int phb_id = pnv_phb4_pec_get_phb_id(pec, stack_no); |
| |
| object_property_set_link(OBJECT(phb), "pec", OBJECT(pec), |
| &error_abort); |
| object_property_set_int(OBJECT(phb), "chip-id", pec->chip_id, |
| &error_fatal); |
| object_property_set_int(OBJECT(phb), "index", phb_id, |
| &error_fatal); |
| |
| if (!sysbus_realize(SYS_BUS_DEVICE(phb), errp)) { |
| return; |
| } |
| |
| /* Add a single Root port if running with defaults */ |
| pnv_phb_attach_root_port(PCI_HOST_BRIDGE(phb), |
| PNV_PHB4_PEC_GET_CLASS(pec)->rp_model); |
| |
| } |
| |
| static void pnv_pec_realize(DeviceState *dev, Error **errp) |
| { |
| PnvPhb4PecState *pec = PNV_PHB4_PEC(dev); |
| PnvPhb4PecClass *pecc = PNV_PHB4_PEC_GET_CLASS(pec); |
| char name[64]; |
| int i; |
| |
| if (pec->index >= PNV_CHIP_GET_CLASS(pec->chip)->num_pecs) { |
| error_setg(errp, "invalid PEC index: %d", pec->index); |
| return; |
| } |
| |
| pec->num_phbs = pecc->num_phbs[pec->index]; |
| |
| /* Create PHBs if running with defaults */ |
| if (defaults_enabled()) { |
| for (i = 0; i < pec->num_phbs; i++) { |
| pnv_pec_default_phb_realize(pec, i, errp); |
| } |
| } |
| |
| /* Initialize the XSCOM regions for the PEC registers */ |
| snprintf(name, sizeof(name), "xscom-pec-%d.%d-nest", pec->chip_id, |
| pec->index); |
| pnv_xscom_region_init(&pec->nest_regs_mr, OBJECT(dev), |
| &pnv_pec_nest_xscom_ops, pec, name, |
| PHB4_PEC_NEST_REGS_COUNT); |
| |
| snprintf(name, sizeof(name), "xscom-pec-%d.%d-pci", pec->chip_id, |
| pec->index); |
| pnv_xscom_region_init(&pec->pci_regs_mr, OBJECT(dev), |
| &pnv_pec_pci_xscom_ops, pec, name, |
| PHB4_PEC_PCI_REGS_COUNT); |
| } |
| |
| static int pnv_pec_dt_xscom(PnvXScomInterface *dev, void *fdt, |
| int xscom_offset) |
| { |
| PnvPhb4PecState *pec = PNV_PHB4_PEC(dev); |
| PnvPhb4PecClass *pecc = PNV_PHB4_PEC_GET_CLASS(dev); |
| uint32_t nbase = pecc->xscom_nest_base(pec); |
| uint32_t pbase = pecc->xscom_pci_base(pec); |
| int offset, i; |
| char *name; |
| uint32_t reg[] = { |
| cpu_to_be32(nbase), |
| cpu_to_be32(pecc->xscom_nest_size), |
| cpu_to_be32(pbase), |
| cpu_to_be32(pecc->xscom_pci_size), |
| }; |
| |
| name = g_strdup_printf("pbcq@%x", nbase); |
| offset = fdt_add_subnode(fdt, xscom_offset, name); |
| _FDT(offset); |
| g_free(name); |
| |
| _FDT((fdt_setprop(fdt, offset, "reg", reg, sizeof(reg)))); |
| |
| _FDT((fdt_setprop_cell(fdt, offset, "ibm,pec-index", pec->index))); |
| _FDT((fdt_setprop_cell(fdt, offset, "#address-cells", 1))); |
| _FDT((fdt_setprop_cell(fdt, offset, "#size-cells", 0))); |
| _FDT((fdt_setprop(fdt, offset, "compatible", pecc->compat, |
| pecc->compat_size))); |
| |
| for (i = 0; i < pec->num_phbs; i++) { |
| int phb_id = pnv_phb4_pec_get_phb_id(pec, i); |
| int stk_offset; |
| |
| name = g_strdup_printf("stack@%x", i); |
| stk_offset = fdt_add_subnode(fdt, offset, name); |
| _FDT(stk_offset); |
| g_free(name); |
| _FDT((fdt_setprop(fdt, stk_offset, "compatible", pecc->stk_compat, |
| pecc->stk_compat_size))); |
| _FDT((fdt_setprop_cell(fdt, stk_offset, "reg", i))); |
| _FDT((fdt_setprop_cell(fdt, stk_offset, "ibm,phb-index", phb_id))); |
| } |
| |
| return 0; |
| } |
| |
| static Property pnv_pec_properties[] = { |
| DEFINE_PROP_UINT32("index", PnvPhb4PecState, index, 0), |
| DEFINE_PROP_UINT32("chip-id", PnvPhb4PecState, chip_id, 0), |
| DEFINE_PROP_LINK("chip", PnvPhb4PecState, chip, TYPE_PNV_CHIP, |
| PnvChip *), |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static uint32_t pnv_pec_xscom_pci_base(PnvPhb4PecState *pec) |
| { |
| return PNV9_XSCOM_PEC_PCI_BASE + 0x1000000 * pec->index; |
| } |
| |
| static uint32_t pnv_pec_xscom_nest_base(PnvPhb4PecState *pec) |
| { |
| return PNV9_XSCOM_PEC_NEST_BASE + 0x400 * pec->index; |
| } |
| |
| /* |
| * PEC0 -> 1 phb |
| * PEC1 -> 2 phb |
| * PEC2 -> 3 phbs |
| */ |
| static const uint32_t pnv_pec_num_phbs[] = { 1, 2, 3 }; |
| |
| static void pnv_pec_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| PnvXScomInterfaceClass *xdc = PNV_XSCOM_INTERFACE_CLASS(klass); |
| PnvPhb4PecClass *pecc = PNV_PHB4_PEC_CLASS(klass); |
| static const char compat[] = "ibm,power9-pbcq"; |
| static const char stk_compat[] = "ibm,power9-phb-stack"; |
| |
| xdc->dt_xscom = pnv_pec_dt_xscom; |
| |
| dc->realize = pnv_pec_realize; |
| device_class_set_props(dc, pnv_pec_properties); |
| dc->user_creatable = false; |
| |
| pecc->xscom_nest_base = pnv_pec_xscom_nest_base; |
| pecc->xscom_pci_base = pnv_pec_xscom_pci_base; |
| pecc->xscom_nest_size = PNV9_XSCOM_PEC_NEST_SIZE; |
| pecc->xscom_pci_size = PNV9_XSCOM_PEC_PCI_SIZE; |
| pecc->compat = compat; |
| pecc->compat_size = sizeof(compat); |
| pecc->stk_compat = stk_compat; |
| pecc->stk_compat_size = sizeof(stk_compat); |
| pecc->version = PNV_PHB4_VERSION; |
| pecc->num_phbs = pnv_pec_num_phbs; |
| pecc->rp_model = TYPE_PNV_PHB4_ROOT_PORT; |
| } |
| |
| static const TypeInfo pnv_pec_type_info = { |
| .name = TYPE_PNV_PHB4_PEC, |
| .parent = TYPE_DEVICE, |
| .instance_size = sizeof(PnvPhb4PecState), |
| .class_init = pnv_pec_class_init, |
| .class_size = sizeof(PnvPhb4PecClass), |
| .interfaces = (InterfaceInfo[]) { |
| { TYPE_PNV_XSCOM_INTERFACE }, |
| { } |
| } |
| }; |
| |
| static void pnv_pec_register_types(void) |
| { |
| type_register_static(&pnv_pec_type_info); |
| } |
| |
| type_init(pnv_pec_register_types); |
