X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Fhw%2Fppc%2Fspapr_iommu.c;fp=qemu%2Fhw%2Fppc%2Fspapr_iommu.c;h=f61504e0c59a03359b134e609e3fbe9d8871bffe;hb=e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb;hp=0000000000000000000000000000000000000000;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git

diff --git a/qemu/hw/ppc/spapr_iommu.c b/qemu/hw/ppc/spapr_iommu.c
new file mode 100644
index 000000000..f61504e0c
--- /dev/null
+++ b/qemu/hw/ppc/spapr_iommu.c
@@ -0,0 +1,479 @@
+/*
+ * 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 "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->vfio_accel);
+    }
+
+    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;
+}
+
+sPAPRTCETable *spapr_tce_new_table(DeviceState *owner, uint32_t liobn,
+                                   uint64_t bus_offset,
+                                   uint32_t page_shift,
+                                   uint32_t nb_table,
+                                   bool vfio_accel)
+{
+    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->vfio_accel = vfio_accel;
+
+    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);