mirror of https://gitee.com/openkylin/qemu.git
237 lines
6.4 KiB
C
237 lines
6.4 KiB
C
/*
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* QEMU sPAPR PCI host for VFIO
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*
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* Copyright (c) 2011-2014 Alexey Kardashevskiy, IBM Corporation.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License,
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* or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "hw/ppc/spapr.h"
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#include "hw/pci-host/spapr.h"
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#include "hw/pci/msix.h"
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#include "linux/vfio.h"
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#include "hw/vfio/vfio.h"
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#include "qemu/error-report.h"
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#define TYPE_SPAPR_PCI_VFIO_HOST_BRIDGE "spapr-pci-vfio-host-bridge"
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#define SPAPR_PCI_VFIO_HOST_BRIDGE(obj) \
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OBJECT_CHECK(sPAPRPHBVFIOState, (obj), TYPE_SPAPR_PCI_VFIO_HOST_BRIDGE)
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typedef struct sPAPRPHBVFIOState sPAPRPHBVFIOState;
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struct sPAPRPHBVFIOState {
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sPAPRPHBState phb;
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int32_t iommugroupid;
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};
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static Property spapr_phb_vfio_properties[] = {
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DEFINE_PROP_INT32("iommu", sPAPRPHBVFIOState, iommugroupid, -1),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void spapr_phb_vfio_instance_init(Object *obj)
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{
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error_report("spapr-pci-vfio-host-bridge is deprecated");
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}
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bool spapr_phb_eeh_available(sPAPRPHBState *sphb)
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{
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return vfio_eeh_as_ok(&sphb->iommu_as);
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}
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static void spapr_phb_vfio_eeh_reenable(sPAPRPHBState *sphb)
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{
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vfio_eeh_as_op(&sphb->iommu_as, VFIO_EEH_PE_ENABLE);
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}
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void spapr_phb_vfio_reset(DeviceState *qdev)
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{
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/*
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* The PE might be in frozen state. To reenable the EEH
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* functionality on it will clean the frozen state, which
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* ensures that the contained PCI devices will work properly
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* after reboot.
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*/
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spapr_phb_vfio_eeh_reenable(SPAPR_PCI_HOST_BRIDGE(qdev));
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}
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int spapr_phb_vfio_eeh_set_option(sPAPRPHBState *sphb,
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unsigned int addr, int option)
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{
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uint32_t op;
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int ret;
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switch (option) {
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case RTAS_EEH_DISABLE:
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op = VFIO_EEH_PE_DISABLE;
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break;
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case RTAS_EEH_ENABLE: {
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PCIHostState *phb;
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PCIDevice *pdev;
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/*
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* The EEH functionality is enabled on basis of PCI device,
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* instead of PE. We need check the validity of the PCI
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* device address.
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*/
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phb = PCI_HOST_BRIDGE(sphb);
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pdev = pci_find_device(phb->bus,
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(addr >> 16) & 0xFF, (addr >> 8) & 0xFF);
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if (!pdev || !object_dynamic_cast(OBJECT(pdev), "vfio-pci")) {
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return RTAS_OUT_PARAM_ERROR;
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}
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op = VFIO_EEH_PE_ENABLE;
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break;
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}
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case RTAS_EEH_THAW_IO:
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op = VFIO_EEH_PE_UNFREEZE_IO;
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break;
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case RTAS_EEH_THAW_DMA:
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op = VFIO_EEH_PE_UNFREEZE_DMA;
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break;
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default:
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return RTAS_OUT_PARAM_ERROR;
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}
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ret = vfio_eeh_as_op(&sphb->iommu_as, op);
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if (ret < 0) {
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return RTAS_OUT_HW_ERROR;
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}
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return RTAS_OUT_SUCCESS;
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}
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int spapr_phb_vfio_eeh_get_state(sPAPRPHBState *sphb, int *state)
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{
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int ret;
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ret = vfio_eeh_as_op(&sphb->iommu_as, VFIO_EEH_PE_GET_STATE);
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if (ret < 0) {
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return RTAS_OUT_PARAM_ERROR;
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}
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*state = ret;
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return RTAS_OUT_SUCCESS;
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}
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static void spapr_phb_vfio_eeh_clear_dev_msix(PCIBus *bus,
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PCIDevice *pdev,
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void *opaque)
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{
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/* Check if the device is VFIO PCI device */
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if (!object_dynamic_cast(OBJECT(pdev), "vfio-pci")) {
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return;
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}
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/*
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* The MSIx table will be cleaned out by reset. We need
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* disable it so that it can be reenabled properly. Also,
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* the cached MSIx table should be cleared as it's not
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* reflecting the contents in hardware.
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*/
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if (msix_enabled(pdev)) {
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uint16_t flags;
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flags = pci_host_config_read_common(pdev,
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pdev->msix_cap + PCI_MSIX_FLAGS,
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pci_config_size(pdev), 2);
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flags &= ~PCI_MSIX_FLAGS_ENABLE;
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pci_host_config_write_common(pdev,
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pdev->msix_cap + PCI_MSIX_FLAGS,
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pci_config_size(pdev), flags, 2);
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}
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msix_reset(pdev);
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}
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static void spapr_phb_vfio_eeh_clear_bus_msix(PCIBus *bus, void *opaque)
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{
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pci_for_each_device(bus, pci_bus_num(bus),
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spapr_phb_vfio_eeh_clear_dev_msix, NULL);
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}
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static void spapr_phb_vfio_eeh_pre_reset(sPAPRPHBState *sphb)
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{
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PCIHostState *phb = PCI_HOST_BRIDGE(sphb);
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pci_for_each_bus(phb->bus, spapr_phb_vfio_eeh_clear_bus_msix, NULL);
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}
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int spapr_phb_vfio_eeh_reset(sPAPRPHBState *sphb, int option)
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{
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uint32_t op;
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int ret;
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switch (option) {
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case RTAS_SLOT_RESET_DEACTIVATE:
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op = VFIO_EEH_PE_RESET_DEACTIVATE;
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break;
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case RTAS_SLOT_RESET_HOT:
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spapr_phb_vfio_eeh_pre_reset(sphb);
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op = VFIO_EEH_PE_RESET_HOT;
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break;
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case RTAS_SLOT_RESET_FUNDAMENTAL:
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spapr_phb_vfio_eeh_pre_reset(sphb);
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op = VFIO_EEH_PE_RESET_FUNDAMENTAL;
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break;
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default:
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return RTAS_OUT_PARAM_ERROR;
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}
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ret = vfio_eeh_as_op(&sphb->iommu_as, op);
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if (ret < 0) {
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return RTAS_OUT_HW_ERROR;
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}
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return RTAS_OUT_SUCCESS;
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}
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int spapr_phb_vfio_eeh_configure(sPAPRPHBState *sphb)
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{
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int ret;
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ret = vfio_eeh_as_op(&sphb->iommu_as, VFIO_EEH_PE_CONFIGURE);
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if (ret < 0) {
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return RTAS_OUT_PARAM_ERROR;
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}
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return RTAS_OUT_SUCCESS;
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}
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static void spapr_phb_vfio_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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dc->props = spapr_phb_vfio_properties;
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}
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static const TypeInfo spapr_phb_vfio_info = {
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.name = TYPE_SPAPR_PCI_VFIO_HOST_BRIDGE,
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.parent = TYPE_SPAPR_PCI_HOST_BRIDGE,
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.instance_size = sizeof(sPAPRPHBVFIOState),
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.instance_init = spapr_phb_vfio_instance_init,
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.class_init = spapr_phb_vfio_class_init,
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};
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static void spapr_pci_vfio_register_types(void)
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{
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type_register_static(&spapr_phb_vfio_info);
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}
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type_init(spapr_pci_vfio_register_types)
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