diff options
Diffstat (limited to 'qemu/hw/ppc/spapr_iommu.c')
| -rw-r--r-- | qemu/hw/ppc/spapr_iommu.c | 512 |
1 files changed, 0 insertions, 512 deletions
diff --git a/qemu/hw/ppc/spapr_iommu.c b/qemu/hw/ppc/spapr_iommu.c deleted file mode 100644 index 7dd458846..000000000 --- a/qemu/hw/ppc/spapr_iommu.c +++ /dev/null @@ -1,512 +0,0 @@ -/* - * QEMU sPAPR IOMMU (TCE) code - * - * Copyright (c) 2010 David Gibson, IBM Corporation <dwg@au1.ibm.com> - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see <http://www.gnu.org/licenses/>. - */ -#include "qemu/osdep.h" -#include "hw/hw.h" -#include "sysemu/kvm.h" -#include "hw/qdev.h" -#include "kvm_ppc.h" -#include "sysemu/dma.h" -#include "exec/address-spaces.h" -#include "trace.h" - -#include "hw/ppc/spapr.h" -#include "hw/ppc/spapr_vio.h" - -#include <libfdt.h> - -enum sPAPRTCEAccess { - SPAPR_TCE_FAULT = 0, - SPAPR_TCE_RO = 1, - SPAPR_TCE_WO = 2, - SPAPR_TCE_RW = 3, -}; - -#define IOMMU_PAGE_SIZE(shift) (1ULL << (shift)) -#define IOMMU_PAGE_MASK(shift) (~(IOMMU_PAGE_SIZE(shift) - 1)) - -static QLIST_HEAD(spapr_tce_tables, sPAPRTCETable) spapr_tce_tables; - -sPAPRTCETable *spapr_tce_find_by_liobn(target_ulong liobn) -{ - sPAPRTCETable *tcet; - - if (liobn & 0xFFFFFFFF00000000ULL) { - hcall_dprintf("Request for out-of-bounds LIOBN 0x" TARGET_FMT_lx "\n", - liobn); - return NULL; - } - - QLIST_FOREACH(tcet, &spapr_tce_tables, list) { - if (tcet->liobn == (uint32_t)liobn) { - return tcet; - } - } - - return NULL; -} - -static IOMMUAccessFlags spapr_tce_iommu_access_flags(uint64_t tce) -{ - switch (tce & SPAPR_TCE_RW) { - case SPAPR_TCE_FAULT: - return IOMMU_NONE; - case SPAPR_TCE_RO: - return IOMMU_RO; - case SPAPR_TCE_WO: - return IOMMU_WO; - default: /* SPAPR_TCE_RW */ - return IOMMU_RW; - } -} - -/* Called from RCU critical section */ -static IOMMUTLBEntry spapr_tce_translate_iommu(MemoryRegion *iommu, hwaddr addr, - bool is_write) -{ - sPAPRTCETable *tcet = container_of(iommu, sPAPRTCETable, iommu); - uint64_t tce; - IOMMUTLBEntry ret = { - .target_as = &address_space_memory, - .iova = 0, - .translated_addr = 0, - .addr_mask = ~(hwaddr)0, - .perm = IOMMU_NONE, - }; - - if ((addr >> tcet->page_shift) < tcet->nb_table) { - /* Check if we are in bound */ - hwaddr page_mask = IOMMU_PAGE_MASK(tcet->page_shift); - - tce = tcet->table[addr >> tcet->page_shift]; - ret.iova = addr & page_mask; - ret.translated_addr = tce & page_mask; - ret.addr_mask = ~page_mask; - ret.perm = spapr_tce_iommu_access_flags(tce); - } - trace_spapr_iommu_xlate(tcet->liobn, addr, ret.iova, ret.perm, - ret.addr_mask); - - return ret; -} - -static int spapr_tce_table_post_load(void *opaque, int version_id) -{ - sPAPRTCETable *tcet = SPAPR_TCE_TABLE(opaque); - - if (tcet->vdev) { - spapr_vio_set_bypass(tcet->vdev, tcet->bypass); - } - - return 0; -} - -static const VMStateDescription vmstate_spapr_tce_table = { - .name = "spapr_iommu", - .version_id = 2, - .minimum_version_id = 2, - .post_load = spapr_tce_table_post_load, - .fields = (VMStateField []) { - /* Sanity check */ - VMSTATE_UINT32_EQUAL(liobn, sPAPRTCETable), - VMSTATE_UINT32_EQUAL(nb_table, sPAPRTCETable), - - /* IOMMU state */ - VMSTATE_BOOL(bypass, sPAPRTCETable), - VMSTATE_VARRAY_UINT32(table, sPAPRTCETable, nb_table, 0, vmstate_info_uint64, uint64_t), - - VMSTATE_END_OF_LIST() - }, -}; - -static MemoryRegionIOMMUOps spapr_iommu_ops = { - .translate = spapr_tce_translate_iommu, -}; - -static int spapr_tce_table_realize(DeviceState *dev) -{ - sPAPRTCETable *tcet = SPAPR_TCE_TABLE(dev); - uint64_t window_size = (uint64_t)tcet->nb_table << tcet->page_shift; - - if (kvm_enabled() && !(window_size >> 32)) { - tcet->table = kvmppc_create_spapr_tce(tcet->liobn, - window_size, - &tcet->fd, - tcet->need_vfio); - } - - if (!tcet->table) { - size_t table_size = tcet->nb_table * sizeof(uint64_t); - tcet->table = g_malloc0(table_size); - } - - trace_spapr_iommu_new_table(tcet->liobn, tcet, tcet->table, tcet->fd); - - memory_region_init_iommu(&tcet->iommu, OBJECT(dev), &spapr_iommu_ops, - "iommu-spapr", - (uint64_t)tcet->nb_table << tcet->page_shift); - - QLIST_INSERT_HEAD(&spapr_tce_tables, tcet, list); - - vmstate_register(DEVICE(tcet), tcet->liobn, &vmstate_spapr_tce_table, - tcet); - - return 0; -} - -void spapr_tce_set_need_vfio(sPAPRTCETable *tcet, bool need_vfio) -{ - size_t table_size = tcet->nb_table * sizeof(uint64_t); - void *newtable; - - if (need_vfio == tcet->need_vfio) { - /* Nothing to do */ - return; - } - - if (!need_vfio) { - /* FIXME: We don't support transition back to KVM accelerated - * TCEs yet */ - return; - } - - tcet->need_vfio = true; - - if (tcet->fd < 0) { - /* Table is already in userspace, nothing to be do */ - return; - } - - newtable = g_malloc(table_size); - memcpy(newtable, tcet->table, table_size); - - kvmppc_remove_spapr_tce(tcet->table, tcet->fd, tcet->nb_table); - - tcet->fd = -1; - tcet->table = newtable; -} - -sPAPRTCETable *spapr_tce_new_table(DeviceState *owner, uint32_t liobn, - uint64_t bus_offset, - uint32_t page_shift, - uint32_t nb_table, - bool need_vfio) -{ - sPAPRTCETable *tcet; - char tmp[64]; - - if (spapr_tce_find_by_liobn(liobn)) { - fprintf(stderr, "Attempted to create TCE table with duplicate" - " LIOBN 0x%x\n", liobn); - return NULL; - } - - if (!nb_table) { - return NULL; - } - - tcet = SPAPR_TCE_TABLE(object_new(TYPE_SPAPR_TCE_TABLE)); - tcet->liobn = liobn; - tcet->bus_offset = bus_offset; - tcet->page_shift = page_shift; - tcet->nb_table = nb_table; - tcet->need_vfio = need_vfio; - - snprintf(tmp, sizeof(tmp), "tce-table-%x", liobn); - object_property_add_child(OBJECT(owner), tmp, OBJECT(tcet), NULL); - - object_property_set_bool(OBJECT(tcet), true, "realized", NULL); - - return tcet; -} - -static void spapr_tce_table_unrealize(DeviceState *dev, Error **errp) -{ - sPAPRTCETable *tcet = SPAPR_TCE_TABLE(dev); - - QLIST_REMOVE(tcet, list); - - if (!kvm_enabled() || - (kvmppc_remove_spapr_tce(tcet->table, tcet->fd, - tcet->nb_table) != 0)) { - g_free(tcet->table); - } -} - -MemoryRegion *spapr_tce_get_iommu(sPAPRTCETable *tcet) -{ - return &tcet->iommu; -} - -static void spapr_tce_reset(DeviceState *dev) -{ - sPAPRTCETable *tcet = SPAPR_TCE_TABLE(dev); - size_t table_size = tcet->nb_table * sizeof(uint64_t); - - memset(tcet->table, 0, table_size); -} - -static target_ulong put_tce_emu(sPAPRTCETable *tcet, target_ulong ioba, - target_ulong tce) -{ - IOMMUTLBEntry entry; - hwaddr page_mask = IOMMU_PAGE_MASK(tcet->page_shift); - unsigned long index = (ioba - tcet->bus_offset) >> tcet->page_shift; - - if (index >= tcet->nb_table) { - hcall_dprintf("spapr_vio_put_tce on out-of-bounds IOBA 0x" - TARGET_FMT_lx "\n", ioba); - return H_PARAMETER; - } - - tcet->table[index] = tce; - - entry.target_as = &address_space_memory, - entry.iova = ioba & page_mask; - entry.translated_addr = tce & page_mask; - entry.addr_mask = ~page_mask; - entry.perm = spapr_tce_iommu_access_flags(tce); - memory_region_notify_iommu(&tcet->iommu, entry); - - return H_SUCCESS; -} - -static target_ulong h_put_tce_indirect(PowerPCCPU *cpu, - sPAPRMachineState *spapr, - target_ulong opcode, target_ulong *args) -{ - int i; - target_ulong liobn = args[0]; - target_ulong ioba = args[1]; - target_ulong ioba1 = ioba; - target_ulong tce_list = args[2]; - target_ulong npages = args[3]; - target_ulong ret = H_PARAMETER, tce = 0; - sPAPRTCETable *tcet = spapr_tce_find_by_liobn(liobn); - CPUState *cs = CPU(cpu); - hwaddr page_mask, page_size; - - if (!tcet) { - return H_PARAMETER; - } - - if ((npages > 512) || (tce_list & SPAPR_TCE_PAGE_MASK)) { - return H_PARAMETER; - } - - page_mask = IOMMU_PAGE_MASK(tcet->page_shift); - page_size = IOMMU_PAGE_SIZE(tcet->page_shift); - ioba &= page_mask; - - for (i = 0; i < npages; ++i, ioba += page_size) { - tce = ldq_be_phys(cs->as, tce_list + i * sizeof(target_ulong)); - - ret = put_tce_emu(tcet, ioba, tce); - if (ret) { - break; - } - } - - /* Trace last successful or the first problematic entry */ - i = i ? (i - 1) : 0; - if (SPAPR_IS_PCI_LIOBN(liobn)) { - trace_spapr_iommu_pci_indirect(liobn, ioba1, tce_list, i, tce, ret); - } else { - trace_spapr_iommu_indirect(liobn, ioba1, tce_list, i, tce, ret); - } - return ret; -} - -static target_ulong h_stuff_tce(PowerPCCPU *cpu, sPAPRMachineState *spapr, - target_ulong opcode, target_ulong *args) -{ - int i; - target_ulong liobn = args[0]; - target_ulong ioba = args[1]; - target_ulong tce_value = args[2]; - target_ulong npages = args[3]; - target_ulong ret = H_PARAMETER; - sPAPRTCETable *tcet = spapr_tce_find_by_liobn(liobn); - hwaddr page_mask, page_size; - - if (!tcet) { - return H_PARAMETER; - } - - if (npages > tcet->nb_table) { - return H_PARAMETER; - } - - page_mask = IOMMU_PAGE_MASK(tcet->page_shift); - page_size = IOMMU_PAGE_SIZE(tcet->page_shift); - ioba &= page_mask; - - for (i = 0; i < npages; ++i, ioba += page_size) { - ret = put_tce_emu(tcet, ioba, tce_value); - if (ret) { - break; - } - } - if (SPAPR_IS_PCI_LIOBN(liobn)) { - trace_spapr_iommu_pci_stuff(liobn, ioba, tce_value, npages, ret); - } else { - trace_spapr_iommu_stuff(liobn, ioba, tce_value, npages, ret); - } - - return ret; -} - -static target_ulong h_put_tce(PowerPCCPU *cpu, sPAPRMachineState *spapr, - target_ulong opcode, target_ulong *args) -{ - target_ulong liobn = args[0]; - target_ulong ioba = args[1]; - target_ulong tce = args[2]; - target_ulong ret = H_PARAMETER; - sPAPRTCETable *tcet = spapr_tce_find_by_liobn(liobn); - - if (tcet) { - hwaddr page_mask = IOMMU_PAGE_MASK(tcet->page_shift); - - ioba &= page_mask; - - ret = put_tce_emu(tcet, ioba, tce); - } - if (SPAPR_IS_PCI_LIOBN(liobn)) { - trace_spapr_iommu_pci_put(liobn, ioba, tce, ret); - } else { - trace_spapr_iommu_put(liobn, ioba, tce, ret); - } - - return ret; -} - -static target_ulong get_tce_emu(sPAPRTCETable *tcet, target_ulong ioba, - target_ulong *tce) -{ - unsigned long index = (ioba - tcet->bus_offset) >> tcet->page_shift; - - if (index >= tcet->nb_table) { - hcall_dprintf("spapr_iommu_get_tce on out-of-bounds IOBA 0x" - TARGET_FMT_lx "\n", ioba); - return H_PARAMETER; - } - - *tce = tcet->table[index]; - - return H_SUCCESS; -} - -static target_ulong h_get_tce(PowerPCCPU *cpu, sPAPRMachineState *spapr, - target_ulong opcode, target_ulong *args) -{ - target_ulong liobn = args[0]; - target_ulong ioba = args[1]; - target_ulong tce = 0; - target_ulong ret = H_PARAMETER; - sPAPRTCETable *tcet = spapr_tce_find_by_liobn(liobn); - - if (tcet) { - hwaddr page_mask = IOMMU_PAGE_MASK(tcet->page_shift); - - ioba &= page_mask; - - ret = get_tce_emu(tcet, ioba, &tce); - if (!ret) { - args[0] = tce; - } - } - if (SPAPR_IS_PCI_LIOBN(liobn)) { - trace_spapr_iommu_pci_get(liobn, ioba, ret, tce); - } else { - trace_spapr_iommu_get(liobn, ioba, ret, tce); - } - - return ret; -} - -int spapr_dma_dt(void *fdt, int node_off, const char *propname, - uint32_t liobn, uint64_t window, uint32_t size) -{ - uint32_t dma_prop[5]; - int ret; - - dma_prop[0] = cpu_to_be32(liobn); - dma_prop[1] = cpu_to_be32(window >> 32); - dma_prop[2] = cpu_to_be32(window & 0xFFFFFFFF); - dma_prop[3] = 0; /* window size is 32 bits */ - dma_prop[4] = cpu_to_be32(size); - - ret = fdt_setprop_cell(fdt, node_off, "ibm,#dma-address-cells", 2); - if (ret < 0) { - return ret; - } - - ret = fdt_setprop_cell(fdt, node_off, "ibm,#dma-size-cells", 2); - if (ret < 0) { - return ret; - } - - ret = fdt_setprop(fdt, node_off, propname, dma_prop, sizeof(dma_prop)); - if (ret < 0) { - return ret; - } - - return 0; -} - -int spapr_tcet_dma_dt(void *fdt, int node_off, const char *propname, - sPAPRTCETable *tcet) -{ - if (!tcet) { - return 0; - } - - return spapr_dma_dt(fdt, node_off, propname, - tcet->liobn, 0, tcet->nb_table << tcet->page_shift); -} - -static void spapr_tce_table_class_init(ObjectClass *klass, void *data) -{ - DeviceClass *dc = DEVICE_CLASS(klass); - dc->init = spapr_tce_table_realize; - dc->reset = spapr_tce_reset; - dc->unrealize = spapr_tce_table_unrealize; - - QLIST_INIT(&spapr_tce_tables); - - /* hcall-tce */ - spapr_register_hypercall(H_PUT_TCE, h_put_tce); - spapr_register_hypercall(H_GET_TCE, h_get_tce); - spapr_register_hypercall(H_PUT_TCE_INDIRECT, h_put_tce_indirect); - spapr_register_hypercall(H_STUFF_TCE, h_stuff_tce); -} - -static TypeInfo spapr_tce_table_info = { - .name = TYPE_SPAPR_TCE_TABLE, - .parent = TYPE_DEVICE, - .instance_size = sizeof(sPAPRTCETable), - .class_init = spapr_tce_table_class_init, -}; - -static void register_types(void) -{ - type_register_static(&spapr_tce_table_info); -} - -type_init(register_types); |