/* * s390 PCI BUS * * Copyright 2014 IBM Corp. * Author(s): Frank Blaschka * Hong Bo Li * Yi Min Zhao * * This work is licensed under the terms of the GNU GPL, version 2 or (at * your option) any later version. See the COPYING file in the top-level * directory. */ #include "qemu/osdep.h" #include "qapi/error.h" #include "qapi/visitor.h" #include "cpu.h" #include "s390-pci-bus.h" #include "s390-pci-inst.h" #include "hw/pci/pci_bus.h" #include "hw/qdev-properties.h" #include "hw/pci/pci_bridge.h" #include "hw/pci/msi.h" #include "qemu/error-report.h" #include "qemu/module.h" #ifndef DEBUG_S390PCI_BUS #define DEBUG_S390PCI_BUS 0 #endif #define DPRINTF(fmt, ...) \ do { \ if (DEBUG_S390PCI_BUS) { \ fprintf(stderr, "S390pci-bus: " fmt, ## __VA_ARGS__); \ } \ } while (0) S390pciState *s390_get_phb(void) { static S390pciState *phb; if (!phb) { phb = S390_PCI_HOST_BRIDGE( object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL)); assert(phb != NULL); } return phb; } int pci_chsc_sei_nt2_get_event(void *res) { ChscSeiNt2Res *nt2_res = (ChscSeiNt2Res *)res; PciCcdfAvail *accdf; PciCcdfErr *eccdf; int rc = 1; SeiContainer *sei_cont; S390pciState *s = s390_get_phb(); sei_cont = QTAILQ_FIRST(&s->pending_sei); if (sei_cont) { QTAILQ_REMOVE(&s->pending_sei, sei_cont, link); nt2_res->nt = 2; nt2_res->cc = sei_cont->cc; nt2_res->length = cpu_to_be16(sizeof(ChscSeiNt2Res)); switch (sei_cont->cc) { case 1: /* error event */ eccdf = (PciCcdfErr *)nt2_res->ccdf; eccdf->fid = cpu_to_be32(sei_cont->fid); eccdf->fh = cpu_to_be32(sei_cont->fh); eccdf->e = cpu_to_be32(sei_cont->e); eccdf->faddr = cpu_to_be64(sei_cont->faddr); eccdf->pec = cpu_to_be16(sei_cont->pec); break; case 2: /* availability event */ accdf = (PciCcdfAvail *)nt2_res->ccdf; accdf->fid = cpu_to_be32(sei_cont->fid); accdf->fh = cpu_to_be32(sei_cont->fh); accdf->pec = cpu_to_be16(sei_cont->pec); break; default: abort(); } g_free(sei_cont); rc = 0; } return rc; } int pci_chsc_sei_nt2_have_event(void) { S390pciState *s = s390_get_phb(); return !QTAILQ_EMPTY(&s->pending_sei); } S390PCIBusDevice *s390_pci_find_next_avail_dev(S390pciState *s, S390PCIBusDevice *pbdev) { S390PCIBusDevice *ret = pbdev ? QTAILQ_NEXT(pbdev, link) : QTAILQ_FIRST(&s->zpci_devs); while (ret && ret->state == ZPCI_FS_RESERVED) { ret = QTAILQ_NEXT(ret, link); } return ret; } S390PCIBusDevice *s390_pci_find_dev_by_fid(S390pciState *s, uint32_t fid) { S390PCIBusDevice *pbdev; QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) { if (pbdev->fid == fid) { return pbdev; } } return NULL; } void s390_pci_sclp_configure(SCCB *sccb) { IoaCfgSccb *psccb = (IoaCfgSccb *)sccb; S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(s390_get_phb(), be32_to_cpu(psccb->aid)); uint16_t rc; if (!pbdev) { DPRINTF("sclp config no dev found\n"); rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED; goto out; } switch (pbdev->state) { case ZPCI_FS_RESERVED: rc = SCLP_RC_ADAPTER_IN_RESERVED_STATE; break; case ZPCI_FS_STANDBY: pbdev->state = ZPCI_FS_DISABLED; rc = SCLP_RC_NORMAL_COMPLETION; break; default: rc = SCLP_RC_NO_ACTION_REQUIRED; } out: psccb->header.response_code = cpu_to_be16(rc); } static void s390_pci_perform_unplug(S390PCIBusDevice *pbdev) { HotplugHandler *hotplug_ctrl; /* Unplug the PCI device */ if (pbdev->pdev) { DeviceState *pdev = DEVICE(pbdev->pdev); hotplug_ctrl = qdev_get_hotplug_handler(pdev); hotplug_handler_unplug(hotplug_ctrl, pdev, &error_abort); object_unparent(OBJECT(pdev)); } /* Unplug the zPCI device */ hotplug_ctrl = qdev_get_hotplug_handler(DEVICE(pbdev)); hotplug_handler_unplug(hotplug_ctrl, DEVICE(pbdev), &error_abort); object_unparent(OBJECT(pbdev)); } void s390_pci_sclp_deconfigure(SCCB *sccb) { IoaCfgSccb *psccb = (IoaCfgSccb *)sccb; S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(s390_get_phb(), be32_to_cpu(psccb->aid)); uint16_t rc; if (!pbdev) { DPRINTF("sclp deconfig no dev found\n"); rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED; goto out; } switch (pbdev->state) { case ZPCI_FS_RESERVED: rc = SCLP_RC_ADAPTER_IN_RESERVED_STATE; break; case ZPCI_FS_STANDBY: rc = SCLP_RC_NO_ACTION_REQUIRED; break; default: if (pbdev->summary_ind) { pci_dereg_irqs(pbdev); } if (pbdev->iommu->enabled) { pci_dereg_ioat(pbdev->iommu); } pbdev->state = ZPCI_FS_STANDBY; rc = SCLP_RC_NORMAL_COMPLETION; if (pbdev->unplug_requested) { s390_pci_perform_unplug(pbdev); } } out: psccb->header.response_code = cpu_to_be16(rc); } static S390PCIBusDevice *s390_pci_find_dev_by_uid(S390pciState *s, uint16_t uid) { S390PCIBusDevice *pbdev; QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) { if (pbdev->uid == uid) { return pbdev; } } return NULL; } S390PCIBusDevice *s390_pci_find_dev_by_target(S390pciState *s, const char *target) { S390PCIBusDevice *pbdev; if (!target) { return NULL; } QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) { if (!strcmp(pbdev->target, target)) { return pbdev; } } return NULL; } static S390PCIBusDevice *s390_pci_find_dev_by_pci(S390pciState *s, PCIDevice *pci_dev) { S390PCIBusDevice *pbdev; if (!pci_dev) { return NULL; } QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) { if (pbdev->pdev == pci_dev) { return pbdev; } } return NULL; } S390PCIBusDevice *s390_pci_find_dev_by_idx(S390pciState *s, uint32_t idx) { return g_hash_table_lookup(s->zpci_table, &idx); } S390PCIBusDevice *s390_pci_find_dev_by_fh(S390pciState *s, uint32_t fh) { uint32_t idx = FH_MASK_INDEX & fh; S390PCIBusDevice *pbdev = s390_pci_find_dev_by_idx(s, idx); if (pbdev && pbdev->fh == fh) { return pbdev; } return NULL; } static void s390_pci_generate_event(uint8_t cc, uint16_t pec, uint32_t fh, uint32_t fid, uint64_t faddr, uint32_t e) { SeiContainer *sei_cont; S390pciState *s = s390_get_phb(); sei_cont = g_new0(SeiContainer, 1); sei_cont->fh = fh; sei_cont->fid = fid; sei_cont->cc = cc; sei_cont->pec = pec; sei_cont->faddr = faddr; sei_cont->e = e; QTAILQ_INSERT_TAIL(&s->pending_sei, sei_cont, link); css_generate_css_crws(0); } static void s390_pci_generate_plug_event(uint16_t pec, uint32_t fh, uint32_t fid) { s390_pci_generate_event(2, pec, fh, fid, 0, 0); } void s390_pci_generate_error_event(uint16_t pec, uint32_t fh, uint32_t fid, uint64_t faddr, uint32_t e) { s390_pci_generate_event(1, pec, fh, fid, faddr, e); } static void s390_pci_set_irq(void *opaque, int irq, int level) { /* nothing to do */ } static int s390_pci_map_irq(PCIDevice *pci_dev, int irq_num) { /* nothing to do */ return 0; } static uint64_t s390_pci_get_table_origin(uint64_t iota) { return iota & ~ZPCI_IOTA_RTTO_FLAG; } static unsigned int calc_rtx(dma_addr_t ptr) { return ((unsigned long) ptr >> ZPCI_RT_SHIFT) & ZPCI_INDEX_MASK; } static unsigned int calc_sx(dma_addr_t ptr) { return ((unsigned long) ptr >> ZPCI_ST_SHIFT) & ZPCI_INDEX_MASK; } static unsigned int calc_px(dma_addr_t ptr) { return ((unsigned long) ptr >> PAGE_SHIFT) & ZPCI_PT_MASK; } static uint64_t get_rt_sto(uint64_t entry) { return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_RTX) ? (entry & ZPCI_RTE_ADDR_MASK) : 0; } static uint64_t get_st_pto(uint64_t entry) { return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_SX) ? (entry & ZPCI_STE_ADDR_MASK) : 0; } static bool rt_entry_isvalid(uint64_t entry) { return (entry & ZPCI_TABLE_VALID_MASK) == ZPCI_TABLE_VALID; } static bool pt_entry_isvalid(uint64_t entry) { return (entry & ZPCI_PTE_VALID_MASK) == ZPCI_PTE_VALID; } static bool entry_isprotected(uint64_t entry) { return (entry & ZPCI_TABLE_PROT_MASK) == ZPCI_TABLE_PROTECTED; } /* ett is expected table type, -1 page table, 0 segment table, 1 region table */ static uint64_t get_table_index(uint64_t iova, int8_t ett) { switch (ett) { case ZPCI_ETT_PT: return calc_px(iova); case ZPCI_ETT_ST: return calc_sx(iova); case ZPCI_ETT_RT: return calc_rtx(iova); } return -1; } static bool entry_isvalid(uint64_t entry, int8_t ett) { switch (ett) { case ZPCI_ETT_PT: return pt_entry_isvalid(entry); case ZPCI_ETT_ST: case ZPCI_ETT_RT: return rt_entry_isvalid(entry); } return false; } /* Return true if address translation is done */ static bool translate_iscomplete(uint64_t entry, int8_t ett) { switch (ett) { case 0: return (entry & ZPCI_TABLE_FC) ? true : false; case 1: return false; } return true; } static uint64_t get_frame_size(int8_t ett) { switch (ett) { case ZPCI_ETT_PT: return 1ULL << 12; case ZPCI_ETT_ST: return 1ULL << 20; case ZPCI_ETT_RT: return 1ULL << 31; } return 0; } static uint64_t get_next_table_origin(uint64_t entry, int8_t ett) { switch (ett) { case ZPCI_ETT_PT: return entry & ZPCI_PTE_ADDR_MASK; case ZPCI_ETT_ST: return get_st_pto(entry); case ZPCI_ETT_RT: return get_rt_sto(entry); } return 0; } /** * table_translate: do translation within one table and return the following * table origin * * @entry: the entry being translated, the result is stored in this. * @to: the address of table origin. * @ett: expected table type, 1 region table, 0 segment table and -1 page table. * @error: error code */ static uint64_t table_translate(S390IOTLBEntry *entry, uint64_t to, int8_t ett, uint16_t *error) { uint64_t tx, te, nto = 0; uint16_t err = 0; tx = get_table_index(entry->iova, ett); te = address_space_ldq(&address_space_memory, to + tx * sizeof(uint64_t), MEMTXATTRS_UNSPECIFIED, NULL); if (!te) { err = ERR_EVENT_INVALTE; goto out; } if (!entry_isvalid(te, ett)) { entry->perm &= IOMMU_NONE; goto out; } if (ett == ZPCI_ETT_RT && ((te & ZPCI_TABLE_LEN_RTX) != ZPCI_TABLE_LEN_RTX || te & ZPCI_TABLE_OFFSET_MASK)) { err = ERR_EVENT_INVALTL; goto out; } nto = get_next_table_origin(te, ett); if (!nto) { err = ERR_EVENT_TT; goto out; } if (entry_isprotected(te)) { entry->perm &= IOMMU_RO; } else { entry->perm &= IOMMU_RW; } if (translate_iscomplete(te, ett)) { switch (ett) { case ZPCI_ETT_PT: entry->translated_addr = te & ZPCI_PTE_ADDR_MASK; break; case ZPCI_ETT_ST: entry->translated_addr = (te & ZPCI_SFAA_MASK) | (entry->iova & ~ZPCI_SFAA_MASK); break; } nto = 0; } out: if (err) { entry->perm = IOMMU_NONE; *error = err; } entry->len = get_frame_size(ett); return nto; } uint16_t s390_guest_io_table_walk(uint64_t g_iota, hwaddr addr, S390IOTLBEntry *entry) { uint64_t to = s390_pci_get_table_origin(g_iota); int8_t ett = 1; uint16_t error = 0; entry->iova = addr & PAGE_MASK; entry->translated_addr = 0; entry->perm = IOMMU_RW; if (entry_isprotected(g_iota)) { entry->perm &= IOMMU_RO; } while (to) { to = table_translate(entry, to, ett--, &error); } return error; } static IOMMUTLBEntry s390_translate_iommu(IOMMUMemoryRegion *mr, hwaddr addr, IOMMUAccessFlags flag, int iommu_idx) { S390PCIIOMMU *iommu = container_of(mr, S390PCIIOMMU, iommu_mr); S390IOTLBEntry *entry; uint64_t iova = addr & PAGE_MASK; uint16_t error = 0; IOMMUTLBEntry ret = { .target_as = &address_space_memory, .iova = 0, .translated_addr = 0, .addr_mask = ~(hwaddr)0, .perm = IOMMU_NONE, }; switch (iommu->pbdev->state) { case ZPCI_FS_ENABLED: case ZPCI_FS_BLOCKED: if (!iommu->enabled) { return ret; } break; default: return ret; } DPRINTF("iommu trans addr 0x%" PRIx64 "\n", addr); if (addr < iommu->pba || addr > iommu->pal) { error = ERR_EVENT_OORANGE; goto err; } entry = g_hash_table_lookup(iommu->iotlb, &iova); if (entry) { ret.iova = entry->iova; ret.translated_addr = entry->translated_addr; ret.addr_mask = entry->len - 1; ret.perm = entry->perm; } else { ret.iova = iova; ret.addr_mask = ~PAGE_MASK; ret.perm = IOMMU_NONE; } if (flag != IOMMU_NONE && !(flag & ret.perm)) { error = ERR_EVENT_TPROTE; } err: if (error) { iommu->pbdev->state = ZPCI_FS_ERROR; s390_pci_generate_error_event(error, iommu->pbdev->fh, iommu->pbdev->fid, addr, 0); } return ret; } static void s390_pci_iommu_replay(IOMMUMemoryRegion *iommu, IOMMUNotifier *notifier) { /* It's impossible to plug a pci device on s390x that already has iommu * mappings which need to be replayed, that is due to the "one iommu per * zpci device" construct. But when we support migration of vfio-pci * devices in future, we need to revisit this. */ return; } static S390PCIIOMMU *s390_pci_get_iommu(S390pciState *s, PCIBus *bus, int devfn) { uint64_t key = (uintptr_t)bus; S390PCIIOMMUTable *table = g_hash_table_lookup(s->iommu_table, &key); S390PCIIOMMU *iommu; if (!table) { table = g_new0(S390PCIIOMMUTable, 1); table->key = key; g_hash_table_insert(s->iommu_table, &table->key, table); } iommu = table->iommu[PCI_SLOT(devfn)]; if (!iommu) { iommu = S390_PCI_IOMMU(object_new(TYPE_S390_PCI_IOMMU)); char *mr_name = g_strdup_printf("iommu-root-%02x:%02x.%01x", pci_bus_num(bus), PCI_SLOT(devfn), PCI_FUNC(devfn)); char *as_name = g_strdup_printf("iommu-pci-%02x:%02x.%01x", pci_bus_num(bus), PCI_SLOT(devfn), PCI_FUNC(devfn)); memory_region_init(&iommu->mr, OBJECT(iommu), mr_name, UINT64_MAX); address_space_init(&iommu->as, &iommu->mr, as_name); iommu->iotlb = g_hash_table_new_full(g_int64_hash, g_int64_equal, NULL, g_free); table->iommu[PCI_SLOT(devfn)] = iommu; g_free(mr_name); g_free(as_name); } return iommu; } static AddressSpace *s390_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn) { S390pciState *s = opaque; S390PCIIOMMU *iommu = s390_pci_get_iommu(s, bus, devfn); return &iommu->as; } static uint8_t set_ind_atomic(uint64_t ind_loc, uint8_t to_be_set) { uint8_t expected, actual; hwaddr len = 1; /* avoid multiple fetches */ uint8_t volatile *ind_addr; ind_addr = cpu_physical_memory_map(ind_loc, &len, true); if (!ind_addr) { s390_pci_generate_error_event(ERR_EVENT_AIRERR, 0, 0, 0, 0); return -1; } actual = *ind_addr; do { expected = actual; actual = atomic_cmpxchg(ind_addr, expected, expected | to_be_set); } while (actual != expected); cpu_physical_memory_unmap((void *)ind_addr, len, 1, len); return actual; } static void s390_msi_ctrl_write(void *opaque, hwaddr addr, uint64_t data, unsigned int size) { S390PCIBusDevice *pbdev = opaque; uint32_t vec = data & ZPCI_MSI_VEC_MASK; uint64_t ind_bit; uint32_t sum_bit; assert(pbdev); DPRINTF("write_msix data 0x%" PRIx64 " idx %d vec 0x%x\n", data, pbdev->idx, vec); if (pbdev->state != ZPCI_FS_ENABLED) { return; } ind_bit = pbdev->routes.adapter.ind_offset; sum_bit = pbdev->routes.adapter.summary_offset; set_ind_atomic(pbdev->routes.adapter.ind_addr + (ind_bit + vec) / 8, 0x80 >> ((ind_bit + vec) % 8)); if (!set_ind_atomic(pbdev->routes.adapter.summary_addr + sum_bit / 8, 0x80 >> (sum_bit % 8))) { css_adapter_interrupt(CSS_IO_ADAPTER_PCI, pbdev->isc); } } static uint64_t s390_msi_ctrl_read(void *opaque, hwaddr addr, unsigned size) { return 0xffffffff; } static const MemoryRegionOps s390_msi_ctrl_ops = { .write = s390_msi_ctrl_write, .read = s390_msi_ctrl_read, .endianness = DEVICE_LITTLE_ENDIAN, }; void s390_pci_iommu_enable(S390PCIIOMMU *iommu) { /* * The iommu region is initialized against a 0-mapped address space, * so the smallest IOMMU region we can define runs from 0 to the end * of the PCI address space. */ char *name = g_strdup_printf("iommu-s390-%04x", iommu->pbdev->uid); memory_region_init_iommu(&iommu->iommu_mr, sizeof(iommu->iommu_mr), TYPE_S390_IOMMU_MEMORY_REGION, OBJECT(&iommu->mr), name, iommu->pal + 1); iommu->enabled = true; memory_region_add_subregion(&iommu->mr, 0, MEMORY_REGION(&iommu->iommu_mr)); g_free(name); } void s390_pci_iommu_disable(S390PCIIOMMU *iommu) { iommu->enabled = false; g_hash_table_remove_all(iommu->iotlb); memory_region_del_subregion(&iommu->mr, MEMORY_REGION(&iommu->iommu_mr)); object_unparent(OBJECT(&iommu->iommu_mr)); } static void s390_pci_iommu_free(S390pciState *s, PCIBus *bus, int32_t devfn) { uint64_t key = (uintptr_t)bus; S390PCIIOMMUTable *table = g_hash_table_lookup(s->iommu_table, &key); S390PCIIOMMU *iommu = table ? table->iommu[PCI_SLOT(devfn)] : NULL; if (!table || !iommu) { return; } table->iommu[PCI_SLOT(devfn)] = NULL; g_hash_table_destroy(iommu->iotlb); address_space_destroy(&iommu->as); object_unparent(OBJECT(&iommu->mr)); object_unparent(OBJECT(iommu)); object_unref(OBJECT(iommu)); } static void s390_pcihost_realize(DeviceState *dev, Error **errp) { PCIBus *b; BusState *bus; PCIHostState *phb = PCI_HOST_BRIDGE(dev); S390pciState *s = S390_PCI_HOST_BRIDGE(dev); Error *local_err = NULL; DPRINTF("host_init\n"); b = pci_register_root_bus(dev, NULL, s390_pci_set_irq, s390_pci_map_irq, NULL, get_system_memory(), get_system_io(), 0, 64, TYPE_PCI_BUS); pci_setup_iommu(b, s390_pci_dma_iommu, s); bus = BUS(b); qbus_set_hotplug_handler(bus, OBJECT(dev)); phb->bus = b; s->bus = S390_PCI_BUS(qbus_create(TYPE_S390_PCI_BUS, dev, NULL)); qbus_set_hotplug_handler(BUS(s->bus), OBJECT(dev)); s->iommu_table = g_hash_table_new_full(g_int64_hash, g_int64_equal, NULL, g_free); s->zpci_table = g_hash_table_new_full(g_int_hash, g_int_equal, NULL, NULL); s->bus_no = 0; QTAILQ_INIT(&s->pending_sei); QTAILQ_INIT(&s->zpci_devs); css_register_io_adapters(CSS_IO_ADAPTER_PCI, true, false, S390_ADAPTER_SUPPRESSIBLE, &local_err); error_propagate(errp, local_err); } static int s390_pci_msix_init(S390PCIBusDevice *pbdev) { char *name; uint8_t pos; uint16_t ctrl; uint32_t table, pba; pos = pci_find_capability(pbdev->pdev, PCI_CAP_ID_MSIX); if (!pos) { return -1; } ctrl = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_FLAGS, pci_config_size(pbdev->pdev), sizeof(ctrl)); table = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_TABLE, pci_config_size(pbdev->pdev), sizeof(table)); pba = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_PBA, pci_config_size(pbdev->pdev), sizeof(pba)); pbdev->msix.table_bar = table & PCI_MSIX_FLAGS_BIRMASK; pbdev->msix.table_offset = table & ~PCI_MSIX_FLAGS_BIRMASK; pbdev->msix.pba_bar = pba & PCI_MSIX_FLAGS_BIRMASK; pbdev->msix.pba_offset = pba & ~PCI_MSIX_FLAGS_BIRMASK; pbdev->msix.entries = (ctrl & PCI_MSIX_FLAGS_QSIZE) + 1; name = g_strdup_printf("msix-s390-%04x", pbdev->uid); memory_region_init_io(&pbdev->msix_notify_mr, OBJECT(pbdev), &s390_msi_ctrl_ops, pbdev, name, PAGE_SIZE); memory_region_add_subregion(&pbdev->iommu->mr, ZPCI_MSI_ADDR, &pbdev->msix_notify_mr); g_free(name); return 0; } static void s390_pci_msix_free(S390PCIBusDevice *pbdev) { memory_region_del_subregion(&pbdev->iommu->mr, &pbdev->msix_notify_mr); object_unparent(OBJECT(&pbdev->msix_notify_mr)); } static S390PCIBusDevice *s390_pci_device_new(S390pciState *s, const char *target, Error **errp) { Error *local_err = NULL; DeviceState *dev; dev = qdev_try_new(TYPE_S390_PCI_DEVICE); if (!dev) { error_setg(errp, "zPCI device could not be created"); return NULL; } object_property_set_str(OBJECT(dev), target, "target", &local_err); if (local_err) { object_unparent(OBJECT(dev)); error_propagate_prepend(errp, local_err, "zPCI device could not be created: "); return NULL; } qdev_realize_and_unref(dev, BUS(s->bus), &local_err); if (local_err) { object_unparent(OBJECT(dev)); error_propagate_prepend(errp, local_err, "zPCI device could not be created: "); return NULL; } return S390_PCI_DEVICE(dev); } static bool s390_pci_alloc_idx(S390pciState *s, S390PCIBusDevice *pbdev) { uint32_t idx; idx = s->next_idx; while (s390_pci_find_dev_by_idx(s, idx)) { idx = (idx + 1) & FH_MASK_INDEX; if (idx == s->next_idx) { return false; } } pbdev->idx = idx; return true; } static void s390_pcihost_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev, Error **errp) { S390pciState *s = S390_PCI_HOST_BRIDGE(hotplug_dev); if (!s390_has_feat(S390_FEAT_ZPCI)) { warn_report("Plugging a PCI/zPCI device without the 'zpci' CPU " "feature enabled; the guest will not be able to see/use " "this device"); } if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { PCIDevice *pdev = PCI_DEVICE(dev); if (pdev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) { error_setg(errp, "multifunction not supported in s390"); return; } } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) { S390PCIBusDevice *pbdev = S390_PCI_DEVICE(dev); if (!s390_pci_alloc_idx(s, pbdev)) { error_setg(errp, "no slot for plugging zpci device"); return; } } } static void s390_pci_update_subordinate(PCIDevice *dev, uint32_t nr) { uint32_t old_nr; pci_default_write_config(dev, PCI_SUBORDINATE_BUS, nr, 1); while (!pci_bus_is_root(pci_get_bus(dev))) { dev = pci_get_bus(dev)->parent_dev; old_nr = pci_default_read_config(dev, PCI_SUBORDINATE_BUS, 1); if (old_nr < nr) { pci_default_write_config(dev, PCI_SUBORDINATE_BUS, nr, 1); } } } static void s390_pcihost_plug(HotplugHandler *hotplug_dev, DeviceState *dev, Error **errp) { S390pciState *s = S390_PCI_HOST_BRIDGE(hotplug_dev); PCIDevice *pdev = NULL; S390PCIBusDevice *pbdev = NULL; if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) { PCIBridge *pb = PCI_BRIDGE(dev); pdev = PCI_DEVICE(dev); pci_bridge_map_irq(pb, dev->id, s390_pci_map_irq); pci_setup_iommu(&pb->sec_bus, s390_pci_dma_iommu, s); qbus_set_hotplug_handler(BUS(&pb->sec_bus), OBJECT(s)); if (dev->hotplugged) { pci_default_write_config(pdev, PCI_PRIMARY_BUS, pci_dev_bus_num(pdev), 1); s->bus_no += 1; pci_default_write_config(pdev, PCI_SECONDARY_BUS, s->bus_no, 1); s390_pci_update_subordinate(pdev, s->bus_no); } } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { pdev = PCI_DEVICE(dev); if (!dev->id) { /* In the case the PCI device does not define an id */ /* we generate one based on the PCI address */ dev->id = g_strdup_printf("auto_%02x:%02x.%01x", pci_dev_bus_num(pdev), PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)); } pbdev = s390_pci_find_dev_by_target(s, dev->id); if (!pbdev) { pbdev = s390_pci_device_new(s, dev->id, errp); if (!pbdev) { return; } } if (object_dynamic_cast(OBJECT(dev), "vfio-pci")) { pbdev->fh |= FH_SHM_VFIO; } else { pbdev->fh |= FH_SHM_EMUL; } pbdev->pdev = pdev; pbdev->iommu = s390_pci_get_iommu(s, pci_get_bus(pdev), pdev->devfn); pbdev->iommu->pbdev = pbdev; pbdev->state = ZPCI_FS_DISABLED; if (s390_pci_msix_init(pbdev)) { error_setg(errp, "MSI-X support is mandatory " "in the S390 architecture"); return; } if (dev->hotplugged) { s390_pci_generate_plug_event(HP_EVENT_TO_CONFIGURED , pbdev->fh, pbdev->fid); } } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) { pbdev = S390_PCI_DEVICE(dev); /* the allocated idx is actually getting used */ s->next_idx = (pbdev->idx + 1) & FH_MASK_INDEX; pbdev->fh = pbdev->idx; QTAILQ_INSERT_TAIL(&s->zpci_devs, pbdev, link); g_hash_table_insert(s->zpci_table, &pbdev->idx, pbdev); } else { g_assert_not_reached(); } } static void s390_pcihost_unplug(HotplugHandler *hotplug_dev, DeviceState *dev, Error **errp) { S390pciState *s = S390_PCI_HOST_BRIDGE(hotplug_dev); S390PCIBusDevice *pbdev = NULL; if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { PCIDevice *pci_dev = PCI_DEVICE(dev); PCIBus *bus; int32_t devfn; pbdev = s390_pci_find_dev_by_pci(s, PCI_DEVICE(dev)); g_assert(pbdev); s390_pci_generate_plug_event(HP_EVENT_STANDBY_TO_RESERVED, pbdev->fh, pbdev->fid); bus = pci_get_bus(pci_dev); devfn = pci_dev->devfn; qdev_unrealize(dev); s390_pci_msix_free(pbdev); s390_pci_iommu_free(s, bus, devfn); pbdev->pdev = NULL; pbdev->state = ZPCI_FS_RESERVED; } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) { pbdev = S390_PCI_DEVICE(dev); pbdev->fid = 0; QTAILQ_REMOVE(&s->zpci_devs, pbdev, link); g_hash_table_remove(s->zpci_table, &pbdev->idx); qdev_unrealize(dev); } } static void s390_pcihost_unplug_request(HotplugHandler *hotplug_dev, DeviceState *dev, Error **errp) { S390pciState *s = S390_PCI_HOST_BRIDGE(hotplug_dev); S390PCIBusDevice *pbdev; if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) { error_setg(errp, "PCI bridge hot unplug currently not supported"); } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { /* * Redirect the unplug request to the zPCI device and remember that * we've checked the PCI device already (to prevent endless recursion). */ pbdev = s390_pci_find_dev_by_pci(s, PCI_DEVICE(dev)); g_assert(pbdev); pbdev->pci_unplug_request_processed = true; qdev_unplug(DEVICE(pbdev), errp); } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) { pbdev = S390_PCI_DEVICE(dev); /* * If unplug was initially requested for the zPCI device, we * first have to redirect to the PCI device, which will in return * redirect back to us after performing its checks (if the request * is not blocked, e.g. because it's a PCI bridge). */ if (pbdev->pdev && !pbdev->pci_unplug_request_processed) { qdev_unplug(DEVICE(pbdev->pdev), errp); return; } pbdev->pci_unplug_request_processed = false; switch (pbdev->state) { case ZPCI_FS_STANDBY: case ZPCI_FS_RESERVED: s390_pci_perform_unplug(pbdev); break; default: /* * Allow to send multiple requests, e.g. if the guest crashed * before releasing the device, we would not be able to send * another request to the same VM (e.g. fresh OS). */ pbdev->unplug_requested = true; s390_pci_generate_plug_event(HP_EVENT_DECONFIGURE_REQUEST, pbdev->fh, pbdev->fid); } } else { g_assert_not_reached(); } } static void s390_pci_enumerate_bridge(PCIBus *bus, PCIDevice *pdev, void *opaque) { S390pciState *s = opaque; PCIBus *sec_bus = NULL; if ((pci_default_read_config(pdev, PCI_HEADER_TYPE, 1) != PCI_HEADER_TYPE_BRIDGE)) { return; } (s->bus_no)++; pci_default_write_config(pdev, PCI_PRIMARY_BUS, pci_dev_bus_num(pdev), 1); pci_default_write_config(pdev, PCI_SECONDARY_BUS, s->bus_no, 1); pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, s->bus_no, 1); sec_bus = pci_bridge_get_sec_bus(PCI_BRIDGE(pdev)); if (!sec_bus) { return; } /* Assign numbers to all child bridges. The last is the highest number. */ pci_for_each_device(sec_bus, pci_bus_num(sec_bus), s390_pci_enumerate_bridge, s); pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, s->bus_no, 1); } static void s390_pcihost_reset(DeviceState *dev) { S390pciState *s = S390_PCI_HOST_BRIDGE(dev); PCIBus *bus = s->parent_obj.bus; S390PCIBusDevice *pbdev, *next; /* Process all pending unplug requests */ QTAILQ_FOREACH_SAFE(pbdev, &s->zpci_devs, link, next) { if (pbdev->unplug_requested) { if (pbdev->summary_ind) { pci_dereg_irqs(pbdev); } if (pbdev->iommu->enabled) { pci_dereg_ioat(pbdev->iommu); } pbdev->state = ZPCI_FS_STANDBY; s390_pci_perform_unplug(pbdev); } } /* * When resetting a PCI bridge, the assigned numbers are set to 0. So * on every system reset, we also have to reassign numbers. */ s->bus_no = 0; pci_for_each_device(bus, pci_bus_num(bus), s390_pci_enumerate_bridge, s); } static void s390_pcihost_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); dc->reset = s390_pcihost_reset; dc->realize = s390_pcihost_realize; hc->pre_plug = s390_pcihost_pre_plug; hc->plug = s390_pcihost_plug; hc->unplug_request = s390_pcihost_unplug_request; hc->unplug = s390_pcihost_unplug; msi_nonbroken = true; } static const TypeInfo s390_pcihost_info = { .name = TYPE_S390_PCI_HOST_BRIDGE, .parent = TYPE_PCI_HOST_BRIDGE, .instance_size = sizeof(S390pciState), .class_init = s390_pcihost_class_init, .interfaces = (InterfaceInfo[]) { { TYPE_HOTPLUG_HANDLER }, { } } }; static const TypeInfo s390_pcibus_info = { .name = TYPE_S390_PCI_BUS, .parent = TYPE_BUS, .instance_size = sizeof(S390PCIBus), }; static uint16_t s390_pci_generate_uid(S390pciState *s) { uint16_t uid = 0; do { uid++; if (!s390_pci_find_dev_by_uid(s, uid)) { return uid; } } while (uid < ZPCI_MAX_UID); return UID_UNDEFINED; } static uint32_t s390_pci_generate_fid(S390pciState *s, Error **errp) { uint32_t fid = 0; do { if (!s390_pci_find_dev_by_fid(s, fid)) { return fid; } } while (fid++ != ZPCI_MAX_FID); error_setg(errp, "no free fid could be found"); return 0; } static void s390_pci_device_realize(DeviceState *dev, Error **errp) { S390PCIBusDevice *zpci = S390_PCI_DEVICE(dev); S390pciState *s = s390_get_phb(); if (!zpci->target) { error_setg(errp, "target must be defined"); return; } if (s390_pci_find_dev_by_target(s, zpci->target)) { error_setg(errp, "target %s already has an associated zpci device", zpci->target); return; } if (zpci->uid == UID_UNDEFINED) { zpci->uid = s390_pci_generate_uid(s); if (!zpci->uid) { error_setg(errp, "no free uid could be found"); return; } } else if (s390_pci_find_dev_by_uid(s, zpci->uid)) { error_setg(errp, "uid %u already in use", zpci->uid); return; } if (!zpci->fid_defined) { Error *local_error = NULL; zpci->fid = s390_pci_generate_fid(s, &local_error); if (local_error) { error_propagate(errp, local_error); return; } } else if (s390_pci_find_dev_by_fid(s, zpci->fid)) { error_setg(errp, "fid %u already in use", zpci->fid); return; } zpci->state = ZPCI_FS_RESERVED; zpci->fmb.format = ZPCI_FMB_FORMAT; } static void s390_pci_device_reset(DeviceState *dev) { S390PCIBusDevice *pbdev = S390_PCI_DEVICE(dev); switch (pbdev->state) { case ZPCI_FS_RESERVED: return; case ZPCI_FS_STANDBY: break; default: pbdev->fh &= ~FH_MASK_ENABLE; pbdev->state = ZPCI_FS_DISABLED; break; } if (pbdev->summary_ind) { pci_dereg_irqs(pbdev); } if (pbdev->iommu->enabled) { pci_dereg_ioat(pbdev->iommu); } fmb_timer_free(pbdev); } static void s390_pci_get_fid(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp) { Property *prop = opaque; uint32_t *ptr = qdev_get_prop_ptr(DEVICE(obj), prop); visit_type_uint32(v, name, ptr, errp); } static void s390_pci_set_fid(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp) { DeviceState *dev = DEVICE(obj); S390PCIBusDevice *zpci = S390_PCI_DEVICE(obj); Property *prop = opaque; uint32_t *ptr = qdev_get_prop_ptr(dev, prop); if (dev->realized) { qdev_prop_set_after_realize(dev, name, errp); return; } visit_type_uint32(v, name, ptr, errp); zpci->fid_defined = true; } static const PropertyInfo s390_pci_fid_propinfo = { .name = "zpci_fid", .get = s390_pci_get_fid, .set = s390_pci_set_fid, }; #define DEFINE_PROP_S390_PCI_FID(_n, _s, _f) \ DEFINE_PROP(_n, _s, _f, s390_pci_fid_propinfo, uint32_t) static Property s390_pci_device_properties[] = { DEFINE_PROP_UINT16("uid", S390PCIBusDevice, uid, UID_UNDEFINED), DEFINE_PROP_S390_PCI_FID("fid", S390PCIBusDevice, fid), DEFINE_PROP_STRING("target", S390PCIBusDevice, target), DEFINE_PROP_END_OF_LIST(), }; static const VMStateDescription s390_pci_device_vmstate = { .name = TYPE_S390_PCI_DEVICE, /* * TODO: add state handling here, so migration works at least with * emulated pci devices on s390x */ .unmigratable = 1, }; static void s390_pci_device_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); dc->desc = "zpci device"; set_bit(DEVICE_CATEGORY_MISC, dc->categories); dc->reset = s390_pci_device_reset; dc->bus_type = TYPE_S390_PCI_BUS; dc->realize = s390_pci_device_realize; device_class_set_props(dc, s390_pci_device_properties); dc->vmsd = &s390_pci_device_vmstate; } static const TypeInfo s390_pci_device_info = { .name = TYPE_S390_PCI_DEVICE, .parent = TYPE_DEVICE, .instance_size = sizeof(S390PCIBusDevice), .class_init = s390_pci_device_class_init, }; static TypeInfo s390_pci_iommu_info = { .name = TYPE_S390_PCI_IOMMU, .parent = TYPE_OBJECT, .instance_size = sizeof(S390PCIIOMMU), }; static void s390_iommu_memory_region_class_init(ObjectClass *klass, void *data) { IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass); imrc->translate = s390_translate_iommu; imrc->replay = s390_pci_iommu_replay; } static const TypeInfo s390_iommu_memory_region_info = { .parent = TYPE_IOMMU_MEMORY_REGION, .name = TYPE_S390_IOMMU_MEMORY_REGION, .class_init = s390_iommu_memory_region_class_init, }; static void s390_pci_register_types(void) { type_register_static(&s390_pcihost_info); type_register_static(&s390_pcibus_info); type_register_static(&s390_pci_device_info); type_register_static(&s390_pci_iommu_info); type_register_static(&s390_iommu_memory_region_info); } type_init(s390_pci_register_types)