diff options
Diffstat (limited to 'qemu/hw/s390x/s390-pci-bus.c')
| -rw-r--r-- | qemu/hw/s390x/s390-pci-bus.c | 621 |
1 files changed, 0 insertions, 621 deletions
diff --git a/qemu/hw/s390x/s390-pci-bus.c b/qemu/hw/s390x/s390-pci-bus.c deleted file mode 100644 index 918b58543..000000000 --- a/qemu/hw/s390x/s390-pci-bus.c +++ /dev/null @@ -1,621 +0,0 @@ -/* - * s390 PCI BUS - * - * Copyright 2014 IBM Corp. - * Author(s): Frank Blaschka <frank.blaschka@de.ibm.com> - * Hong Bo Li <lihbbj@cn.ibm.com> - * Yi Min Zhao <zyimin@cn.ibm.com> - * - * 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 "qemu-common.h" -#include "cpu.h" -#include "s390-pci-bus.h" -#include <hw/pci/pci_bus.h> -#include <hw/pci/msi.h> -#include <qemu/error-report.h> - -/* #define DEBUG_S390PCI_BUS */ -#ifdef DEBUG_S390PCI_BUS -#define DPRINTF(fmt, ...) \ - do { fprintf(stderr, "S390pci-bus: " fmt, ## __VA_ARGS__); } while (0) -#else -#define DPRINTF(fmt, ...) \ - do { } while (0) -#endif - -int 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_PCI_HOST_BRIDGE( - object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL)); - - if (!s) { - return rc; - } - - 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 chsc_sei_nt2_have_event(void) -{ - S390pciState *s = S390_PCI_HOST_BRIDGE( - object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL)); - - if (!s) { - return 0; - } - - return !QTAILQ_EMPTY(&s->pending_sei); -} - -S390PCIBusDevice *s390_pci_find_dev_by_fid(uint32_t fid) -{ - S390PCIBusDevice *pbdev; - int i; - S390pciState *s = S390_PCI_HOST_BRIDGE( - object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL)); - - if (!s) { - return NULL; - } - - for (i = 0; i < PCI_SLOT_MAX; i++) { - pbdev = &s->pbdev[i]; - if ((pbdev->fh != 0) && (pbdev->fid == fid)) { - return pbdev; - } - } - - return NULL; -} - -void s390_pci_sclp_configure(int configure, SCCB *sccb) -{ - PciCfgSccb *psccb = (PciCfgSccb *)sccb; - S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(be32_to_cpu(psccb->aid)); - uint16_t rc; - - if (pbdev) { - if ((configure == 1 && pbdev->configured == true) || - (configure == 0 && pbdev->configured == false)) { - rc = SCLP_RC_NO_ACTION_REQUIRED; - } else { - pbdev->configured = !pbdev->configured; - rc = SCLP_RC_NORMAL_COMPLETION; - } - } else { - DPRINTF("sclp config %d no dev found\n", configure); - rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED; - } - - psccb->header.response_code = cpu_to_be16(rc); -} - -static uint32_t s390_pci_get_pfid(PCIDevice *pdev) -{ - return PCI_SLOT(pdev->devfn); -} - -static uint32_t s390_pci_get_pfh(PCIDevice *pdev) -{ - return PCI_SLOT(pdev->devfn) | FH_VIRT; -} - -S390PCIBusDevice *s390_pci_find_dev_by_idx(uint32_t idx) -{ - S390PCIBusDevice *pbdev; - int i; - int j = 0; - S390pciState *s = S390_PCI_HOST_BRIDGE( - object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL)); - - if (!s) { - return NULL; - } - - for (i = 0; i < PCI_SLOT_MAX; i++) { - pbdev = &s->pbdev[i]; - - if (pbdev->fh == 0) { - continue; - } - - if (j == idx) { - return pbdev; - } - j++; - } - - return NULL; -} - -S390PCIBusDevice *s390_pci_find_dev_by_fh(uint32_t fh) -{ - S390PCIBusDevice *pbdev; - int i; - S390pciState *s = S390_PCI_HOST_BRIDGE( - object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL)); - - if (!s || !fh) { - return NULL; - } - - for (i = 0; i < PCI_SLOT_MAX; i++) { - pbdev = &s->pbdev[i]; - if (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_PCI_HOST_BRIDGE( - object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL)); - - if (!s) { - return; - } - - sei_cont = g_malloc0(sizeof(SeiContainer)); - 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); -} - -static 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 uint64_t s390_guest_io_table_walk(uint64_t guest_iota, - uint64_t guest_dma_address) -{ - uint64_t sto_a, pto_a, px_a; - uint64_t sto, pto, pte; - uint32_t rtx, sx, px; - - rtx = calc_rtx(guest_dma_address); - sx = calc_sx(guest_dma_address); - px = calc_px(guest_dma_address); - - sto_a = guest_iota + rtx * sizeof(uint64_t); - sto = address_space_ldq(&address_space_memory, sto_a, - MEMTXATTRS_UNSPECIFIED, NULL); - sto = get_rt_sto(sto); - if (!sto) { - pte = 0; - goto out; - } - - pto_a = sto + sx * sizeof(uint64_t); - pto = address_space_ldq(&address_space_memory, pto_a, - MEMTXATTRS_UNSPECIFIED, NULL); - pto = get_st_pto(pto); - if (!pto) { - pte = 0; - goto out; - } - - px_a = pto + px * sizeof(uint64_t); - pte = address_space_ldq(&address_space_memory, px_a, - MEMTXATTRS_UNSPECIFIED, NULL); - -out: - return pte; -} - -static IOMMUTLBEntry s390_translate_iommu(MemoryRegion *iommu, hwaddr addr, - bool is_write) -{ - uint64_t pte; - uint32_t flags; - S390PCIBusDevice *pbdev = container_of(iommu, S390PCIBusDevice, iommu_mr); - S390pciState *s; - IOMMUTLBEntry ret = { - .target_as = &address_space_memory, - .iova = 0, - .translated_addr = 0, - .addr_mask = ~(hwaddr)0, - .perm = IOMMU_NONE, - }; - - if (!pbdev->configured || !pbdev->pdev || !(pbdev->fh & FH_ENABLED)) { - return ret; - } - - DPRINTF("iommu trans addr 0x%" PRIx64 "\n", addr); - - s = S390_PCI_HOST_BRIDGE(pci_device_root_bus(pbdev->pdev)->qbus.parent); - /* s390 does not have an APIC mapped to main storage so we use - * a separate AddressSpace only for msix notifications - */ - if (addr == ZPCI_MSI_ADDR) { - ret.target_as = &s->msix_notify_as; - ret.iova = addr; - ret.translated_addr = addr; - ret.addr_mask = 0xfff; - ret.perm = IOMMU_RW; - return ret; - } - - if (!pbdev->g_iota) { - pbdev->error_state = true; - pbdev->lgstg_blocked = true; - s390_pci_generate_error_event(ERR_EVENT_INVALAS, pbdev->fh, pbdev->fid, - addr, 0); - return ret; - } - - if (addr < pbdev->pba || addr > pbdev->pal) { - pbdev->error_state = true; - pbdev->lgstg_blocked = true; - s390_pci_generate_error_event(ERR_EVENT_OORANGE, pbdev->fh, pbdev->fid, - addr, 0); - return ret; - } - - pte = s390_guest_io_table_walk(s390_pci_get_table_origin(pbdev->g_iota), - addr); - - if (!pte) { - pbdev->error_state = true; - pbdev->lgstg_blocked = true; - s390_pci_generate_error_event(ERR_EVENT_SERR, pbdev->fh, pbdev->fid, - addr, ERR_EVENT_Q_BIT); - return ret; - } - - flags = pte & ZPCI_PTE_FLAG_MASK; - ret.iova = addr; - ret.translated_addr = pte & ZPCI_PTE_ADDR_MASK; - ret.addr_mask = 0xfff; - - if (flags & ZPCI_PTE_INVALID) { - ret.perm = IOMMU_NONE; - } else { - ret.perm = IOMMU_RW; - } - - return ret; -} - -static const MemoryRegionIOMMUOps s390_iommu_ops = { - .translate = s390_translate_iommu, -}; - -static AddressSpace *s390_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn) -{ - S390pciState *s = opaque; - - return &s->pbdev[PCI_SLOT(devfn)].as; -} - -static uint8_t set_ind_atomic(uint64_t ind_loc, uint8_t to_be_set) -{ - uint8_t ind_old, ind_new; - hwaddr len = 1; - uint8_t *ind_addr; - - ind_addr = cpu_physical_memory_map(ind_loc, &len, 1); - if (!ind_addr) { - s390_pci_generate_error_event(ERR_EVENT_AIRERR, 0, 0, 0, 0); - return -1; - } - do { - ind_old = *ind_addr; - ind_new = ind_old | to_be_set; - } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old); - cpu_physical_memory_unmap(ind_addr, len, 1, len); - - return ind_old; -} - -static void s390_msi_ctrl_write(void *opaque, hwaddr addr, uint64_t data, - unsigned int size) -{ - S390PCIBusDevice *pbdev; - uint32_t io_int_word; - uint32_t fid = data >> ZPCI_MSI_VEC_BITS; - uint32_t vec = data & ZPCI_MSI_VEC_MASK; - uint64_t ind_bit; - uint32_t sum_bit; - uint32_t e = 0; - - DPRINTF("write_msix data 0x%" PRIx64 " fid %d vec 0x%x\n", data, fid, vec); - - pbdev = s390_pci_find_dev_by_fid(fid); - if (!pbdev) { - e |= (vec << ERR_EVENT_MVN_OFFSET); - s390_pci_generate_error_event(ERR_EVENT_NOMSI, 0, fid, addr, e); - return; - } - - if (!(pbdev->fh & FH_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))) { - io_int_word = (pbdev->isc << 27) | IO_INT_WORD_AI; - s390_io_interrupt(0, 0, 0, io_int_word); - } -} - -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_pcihost_iommu_configure(S390PCIBusDevice *pbdev, bool enable) -{ - pbdev->configured = false; - - if (enable) { - uint64_t size = pbdev->pal - pbdev->pba + 1; - memory_region_init_iommu(&pbdev->iommu_mr, OBJECT(&pbdev->mr), - &s390_iommu_ops, "iommu-s390", size); - memory_region_add_subregion(&pbdev->mr, pbdev->pba, &pbdev->iommu_mr); - } else { - memory_region_del_subregion(&pbdev->mr, &pbdev->iommu_mr); - } - - pbdev->configured = true; -} - -static void s390_pcihost_init_as(S390pciState *s) -{ - int i; - S390PCIBusDevice *pbdev; - - for (i = 0; i < PCI_SLOT_MAX; i++) { - pbdev = &s->pbdev[i]; - memory_region_init(&pbdev->mr, OBJECT(s), - "iommu-root-s390", UINT64_MAX); - address_space_init(&pbdev->as, &pbdev->mr, "iommu-pci"); - } - - memory_region_init_io(&s->msix_notify_mr, OBJECT(s), - &s390_msi_ctrl_ops, s, "msix-s390", UINT64_MAX); - address_space_init(&s->msix_notify_as, &s->msix_notify_mr, "msix-pci"); -} - -static int s390_pcihost_init(SysBusDevice *dev) -{ - PCIBus *b; - BusState *bus; - PCIHostState *phb = PCI_HOST_BRIDGE(dev); - S390pciState *s = S390_PCI_HOST_BRIDGE(dev); - - DPRINTF("host_init\n"); - - b = pci_register_bus(DEVICE(dev), NULL, - s390_pci_set_irq, s390_pci_map_irq, NULL, - get_system_memory(), get_system_io(), 0, 64, - TYPE_PCI_BUS); - s390_pcihost_init_as(s); - pci_setup_iommu(b, s390_pci_dma_iommu, s); - - bus = BUS(b); - qbus_set_hotplug_handler(bus, DEVICE(dev), NULL); - phb->bus = b; - QTAILQ_INIT(&s->pending_sei); - return 0; -} - -static int s390_pcihost_setup_msix(S390PCIBusDevice *pbdev) -{ - uint8_t pos; - uint16_t ctrl; - uint32_t table, pba; - - pos = pci_find_capability(pbdev->pdev, PCI_CAP_ID_MSIX); - if (!pos) { - pbdev->msix.available = false; - return 0; - } - - 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; - pbdev->msix.available = true; - return 0; -} - -static void s390_pcihost_hot_plug(HotplugHandler *hotplug_dev, - DeviceState *dev, Error **errp) -{ - PCIDevice *pci_dev = PCI_DEVICE(dev); - S390PCIBusDevice *pbdev; - S390pciState *s = S390_PCI_HOST_BRIDGE(pci_device_root_bus(pci_dev) - ->qbus.parent); - - pbdev = &s->pbdev[PCI_SLOT(pci_dev->devfn)]; - - pbdev->fid = s390_pci_get_pfid(pci_dev); - pbdev->pdev = pci_dev; - pbdev->configured = true; - pbdev->fh = s390_pci_get_pfh(pci_dev); - - s390_pcihost_setup_msix(pbdev); - - if (dev->hotplugged) { - s390_pci_generate_plug_event(HP_EVENT_RESERVED_TO_STANDBY, - pbdev->fh, pbdev->fid); - s390_pci_generate_plug_event(HP_EVENT_TO_CONFIGURED, - pbdev->fh, pbdev->fid); - } -} - -static void s390_pcihost_hot_unplug(HotplugHandler *hotplug_dev, - DeviceState *dev, Error **errp) -{ - PCIDevice *pci_dev = PCI_DEVICE(dev); - S390pciState *s = S390_PCI_HOST_BRIDGE(pci_device_root_bus(pci_dev) - ->qbus.parent); - S390PCIBusDevice *pbdev = &s->pbdev[PCI_SLOT(pci_dev->devfn)]; - - if (pbdev->configured) { - pbdev->configured = false; - s390_pci_generate_plug_event(HP_EVENT_CONFIGURED_TO_STBRES, - pbdev->fh, pbdev->fid); - } - - s390_pci_generate_plug_event(HP_EVENT_STANDBY_TO_RESERVED, - pbdev->fh, pbdev->fid); - pbdev->fh = 0; - pbdev->fid = 0; - pbdev->pdev = NULL; - object_unparent(OBJECT(pci_dev)); -} - -static void s390_pcihost_class_init(ObjectClass *klass, void *data) -{ - SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); - DeviceClass *dc = DEVICE_CLASS(klass); - HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); - - dc->cannot_instantiate_with_device_add_yet = true; - k->init = s390_pcihost_init; - hc->plug = s390_pcihost_hot_plug; - hc->unplug = s390_pcihost_hot_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 void s390_pci_register_types(void) -{ - type_register_static(&s390_pcihost_info); -} - -type_init(s390_pci_register_types) |