1082 lines
30 KiB
C
1082 lines
30 KiB
C
/*
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* s390 PCI BUS
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*
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* Copyright 2014 IBM Corp.
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* Author(s): Frank Blaschka <frank.blaschka@de.ibm.com>
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* Hong Bo Li <lihbbj@cn.ibm.com>
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* Yi Min Zhao <zyimin@cn.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at
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* your option) any later version. See the COPYING file in the top-level
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* directory.
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "qapi/visitor.h"
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#include "qemu-common.h"
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#include "cpu.h"
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#include "s390-pci-bus.h"
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#include "s390-pci-inst.h"
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#include "hw/pci/pci_bus.h"
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#include "hw/pci/pci_bridge.h"
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#include "hw/pci/msi.h"
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#include "qemu/error-report.h"
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#ifndef DEBUG_S390PCI_BUS
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#define DEBUG_S390PCI_BUS 0
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#endif
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#define DPRINTF(fmt, ...) \
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do { \
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if (DEBUG_S390PCI_BUS) { \
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fprintf(stderr, "S390pci-bus: " fmt, ## __VA_ARGS__); \
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} \
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} while (0)
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S390pciState *s390_get_phb(void)
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{
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static S390pciState *phb;
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if (!phb) {
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phb = S390_PCI_HOST_BRIDGE(
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object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL));
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assert(phb != NULL);
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}
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return phb;
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}
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int chsc_sei_nt2_get_event(void *res)
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{
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ChscSeiNt2Res *nt2_res = (ChscSeiNt2Res *)res;
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PciCcdfAvail *accdf;
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PciCcdfErr *eccdf;
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int rc = 1;
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SeiContainer *sei_cont;
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S390pciState *s = s390_get_phb();
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sei_cont = QTAILQ_FIRST(&s->pending_sei);
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if (sei_cont) {
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QTAILQ_REMOVE(&s->pending_sei, sei_cont, link);
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nt2_res->nt = 2;
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nt2_res->cc = sei_cont->cc;
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nt2_res->length = cpu_to_be16(sizeof(ChscSeiNt2Res));
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switch (sei_cont->cc) {
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case 1: /* error event */
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eccdf = (PciCcdfErr *)nt2_res->ccdf;
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eccdf->fid = cpu_to_be32(sei_cont->fid);
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eccdf->fh = cpu_to_be32(sei_cont->fh);
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eccdf->e = cpu_to_be32(sei_cont->e);
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eccdf->faddr = cpu_to_be64(sei_cont->faddr);
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eccdf->pec = cpu_to_be16(sei_cont->pec);
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break;
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case 2: /* availability event */
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accdf = (PciCcdfAvail *)nt2_res->ccdf;
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accdf->fid = cpu_to_be32(sei_cont->fid);
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accdf->fh = cpu_to_be32(sei_cont->fh);
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accdf->pec = cpu_to_be16(sei_cont->pec);
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break;
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default:
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abort();
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}
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g_free(sei_cont);
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rc = 0;
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}
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return rc;
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}
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int chsc_sei_nt2_have_event(void)
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{
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S390pciState *s = s390_get_phb();
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return !QTAILQ_EMPTY(&s->pending_sei);
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}
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S390PCIBusDevice *s390_pci_find_next_avail_dev(S390pciState *s,
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S390PCIBusDevice *pbdev)
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{
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S390PCIBusDevice *ret = pbdev ? QTAILQ_NEXT(pbdev, link) :
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QTAILQ_FIRST(&s->zpci_devs);
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while (ret && ret->state == ZPCI_FS_RESERVED) {
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ret = QTAILQ_NEXT(ret, link);
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}
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return ret;
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}
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S390PCIBusDevice *s390_pci_find_dev_by_fid(S390pciState *s, uint32_t fid)
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{
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S390PCIBusDevice *pbdev;
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QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) {
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if (pbdev->fid == fid) {
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return pbdev;
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}
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}
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return NULL;
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}
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void s390_pci_sclp_configure(SCCB *sccb)
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{
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PciCfgSccb *psccb = (PciCfgSccb *)sccb;
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S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(s390_get_phb(),
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be32_to_cpu(psccb->aid));
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uint16_t rc;
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if (be16_to_cpu(sccb->h.length) < 16) {
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rc = SCLP_RC_INSUFFICIENT_SCCB_LENGTH;
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goto out;
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}
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if (!pbdev) {
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DPRINTF("sclp config no dev found\n");
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rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED;
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goto out;
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}
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switch (pbdev->state) {
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case ZPCI_FS_RESERVED:
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rc = SCLP_RC_ADAPTER_IN_RESERVED_STATE;
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break;
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case ZPCI_FS_STANDBY:
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pbdev->state = ZPCI_FS_DISABLED;
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rc = SCLP_RC_NORMAL_COMPLETION;
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break;
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default:
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rc = SCLP_RC_NO_ACTION_REQUIRED;
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}
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out:
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psccb->header.response_code = cpu_to_be16(rc);
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}
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void s390_pci_sclp_deconfigure(SCCB *sccb)
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{
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PciCfgSccb *psccb = (PciCfgSccb *)sccb;
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S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(s390_get_phb(),
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be32_to_cpu(psccb->aid));
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uint16_t rc;
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if (be16_to_cpu(sccb->h.length) < 16) {
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rc = SCLP_RC_INSUFFICIENT_SCCB_LENGTH;
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goto out;
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}
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if (!pbdev) {
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DPRINTF("sclp deconfig no dev found\n");
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rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED;
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goto out;
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}
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switch (pbdev->state) {
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case ZPCI_FS_RESERVED:
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rc = SCLP_RC_ADAPTER_IN_RESERVED_STATE;
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break;
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case ZPCI_FS_STANDBY:
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rc = SCLP_RC_NO_ACTION_REQUIRED;
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break;
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default:
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if (pbdev->summary_ind) {
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pci_dereg_irqs(pbdev);
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}
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if (pbdev->iommu->enabled) {
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pci_dereg_ioat(pbdev->iommu);
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}
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pbdev->state = ZPCI_FS_STANDBY;
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rc = SCLP_RC_NORMAL_COMPLETION;
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if (pbdev->release_timer) {
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qdev_unplug(DEVICE(pbdev->pdev), NULL);
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}
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}
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out:
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psccb->header.response_code = cpu_to_be16(rc);
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}
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static S390PCIBusDevice *s390_pci_find_dev_by_uid(S390pciState *s, uint16_t uid)
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{
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S390PCIBusDevice *pbdev;
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QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) {
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if (pbdev->uid == uid) {
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return pbdev;
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}
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}
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return NULL;
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}
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static S390PCIBusDevice *s390_pci_find_dev_by_target(S390pciState *s,
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const char *target)
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{
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S390PCIBusDevice *pbdev;
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if (!target) {
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return NULL;
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}
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QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) {
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if (!strcmp(pbdev->target, target)) {
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return pbdev;
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}
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}
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return NULL;
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}
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S390PCIBusDevice *s390_pci_find_dev_by_idx(S390pciState *s, uint32_t idx)
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{
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return g_hash_table_lookup(s->zpci_table, &idx);
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}
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S390PCIBusDevice *s390_pci_find_dev_by_fh(S390pciState *s, uint32_t fh)
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{
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uint32_t idx = FH_MASK_INDEX & fh;
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S390PCIBusDevice *pbdev = s390_pci_find_dev_by_idx(s, idx);
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if (pbdev && pbdev->fh == fh) {
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return pbdev;
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}
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return NULL;
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}
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static void s390_pci_generate_event(uint8_t cc, uint16_t pec, uint32_t fh,
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uint32_t fid, uint64_t faddr, uint32_t e)
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{
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SeiContainer *sei_cont;
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S390pciState *s = s390_get_phb();
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sei_cont = g_malloc0(sizeof(SeiContainer));
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sei_cont->fh = fh;
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sei_cont->fid = fid;
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sei_cont->cc = cc;
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sei_cont->pec = pec;
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sei_cont->faddr = faddr;
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sei_cont->e = e;
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QTAILQ_INSERT_TAIL(&s->pending_sei, sei_cont, link);
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css_generate_css_crws(0);
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}
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static void s390_pci_generate_plug_event(uint16_t pec, uint32_t fh,
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uint32_t fid)
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{
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s390_pci_generate_event(2, pec, fh, fid, 0, 0);
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}
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void s390_pci_generate_error_event(uint16_t pec, uint32_t fh, uint32_t fid,
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uint64_t faddr, uint32_t e)
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{
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s390_pci_generate_event(1, pec, fh, fid, faddr, e);
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}
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static void s390_pci_set_irq(void *opaque, int irq, int level)
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{
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/* nothing to do */
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}
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static int s390_pci_map_irq(PCIDevice *pci_dev, int irq_num)
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{
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/* nothing to do */
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return 0;
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}
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static uint64_t s390_pci_get_table_origin(uint64_t iota)
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{
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return iota & ~ZPCI_IOTA_RTTO_FLAG;
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}
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static unsigned int calc_rtx(dma_addr_t ptr)
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{
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return ((unsigned long) ptr >> ZPCI_RT_SHIFT) & ZPCI_INDEX_MASK;
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}
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static unsigned int calc_sx(dma_addr_t ptr)
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{
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return ((unsigned long) ptr >> ZPCI_ST_SHIFT) & ZPCI_INDEX_MASK;
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}
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static unsigned int calc_px(dma_addr_t ptr)
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{
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return ((unsigned long) ptr >> PAGE_SHIFT) & ZPCI_PT_MASK;
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}
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static uint64_t get_rt_sto(uint64_t entry)
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{
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return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_RTX)
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? (entry & ZPCI_RTE_ADDR_MASK)
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: 0;
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}
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static uint64_t get_st_pto(uint64_t entry)
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{
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return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_SX)
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? (entry & ZPCI_STE_ADDR_MASK)
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: 0;
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}
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static uint64_t s390_guest_io_table_walk(uint64_t guest_iota,
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uint64_t guest_dma_address)
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{
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uint64_t sto_a, pto_a, px_a;
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uint64_t sto, pto, pte;
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uint32_t rtx, sx, px;
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rtx = calc_rtx(guest_dma_address);
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sx = calc_sx(guest_dma_address);
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px = calc_px(guest_dma_address);
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sto_a = guest_iota + rtx * sizeof(uint64_t);
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sto = address_space_ldq(&address_space_memory, sto_a,
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MEMTXATTRS_UNSPECIFIED, NULL);
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sto = get_rt_sto(sto);
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if (!sto) {
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pte = 0;
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goto out;
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}
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pto_a = sto + sx * sizeof(uint64_t);
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pto = address_space_ldq(&address_space_memory, pto_a,
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MEMTXATTRS_UNSPECIFIED, NULL);
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pto = get_st_pto(pto);
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if (!pto) {
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pte = 0;
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goto out;
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}
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px_a = pto + px * sizeof(uint64_t);
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pte = address_space_ldq(&address_space_memory, px_a,
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MEMTXATTRS_UNSPECIFIED, NULL);
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out:
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return pte;
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}
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static IOMMUTLBEntry s390_translate_iommu(IOMMUMemoryRegion *mr, hwaddr addr,
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IOMMUAccessFlags flag)
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{
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uint64_t pte;
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uint32_t flags;
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S390PCIIOMMU *iommu = container_of(mr, S390PCIIOMMU, iommu_mr);
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IOMMUTLBEntry ret = {
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.target_as = &address_space_memory,
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.iova = 0,
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.translated_addr = 0,
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.addr_mask = ~(hwaddr)0,
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.perm = IOMMU_NONE,
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};
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switch (iommu->pbdev->state) {
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case ZPCI_FS_ENABLED:
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case ZPCI_FS_BLOCKED:
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if (!iommu->enabled) {
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return ret;
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}
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break;
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default:
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return ret;
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}
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DPRINTF("iommu trans addr 0x%" PRIx64 "\n", addr);
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if (addr < iommu->pba || addr > iommu->pal) {
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return ret;
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}
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pte = s390_guest_io_table_walk(s390_pci_get_table_origin(iommu->g_iota),
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addr);
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if (!pte) {
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return ret;
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}
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flags = pte & ZPCI_PTE_FLAG_MASK;
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ret.iova = addr;
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ret.translated_addr = pte & ZPCI_PTE_ADDR_MASK;
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ret.addr_mask = 0xfff;
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|
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if (flags & ZPCI_PTE_INVALID) {
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ret.perm = IOMMU_NONE;
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} else {
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ret.perm = IOMMU_RW;
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}
|
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|
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return ret;
|
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}
|
|
|
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static S390PCIIOMMU *s390_pci_get_iommu(S390pciState *s, PCIBus *bus,
|
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int devfn)
|
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{
|
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uint64_t key = (uintptr_t)bus;
|
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S390PCIIOMMUTable *table = g_hash_table_lookup(s->iommu_table, &key);
|
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S390PCIIOMMU *iommu;
|
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|
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if (!table) {
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table = g_malloc0(sizeof(S390PCIIOMMUTable));
|
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table->key = key;
|
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g_hash_table_insert(s->iommu_table, &table->key, table);
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}
|
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|
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iommu = table->iommu[PCI_SLOT(devfn)];
|
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if (!iommu) {
|
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iommu = S390_PCI_IOMMU(object_new(TYPE_S390_PCI_IOMMU));
|
|
|
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char *mr_name = g_strdup_printf("iommu-root-%02x:%02x.%01x",
|
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pci_bus_num(bus),
|
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PCI_SLOT(devfn),
|
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PCI_FUNC(devfn));
|
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char *as_name = g_strdup_printf("iommu-pci-%02x:%02x.%01x",
|
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pci_bus_num(bus),
|
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PCI_SLOT(devfn),
|
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PCI_FUNC(devfn));
|
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memory_region_init(&iommu->mr, OBJECT(iommu), mr_name, UINT64_MAX);
|
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address_space_init(&iommu->as, &iommu->mr, as_name);
|
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table->iommu[PCI_SLOT(devfn)] = iommu;
|
|
|
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g_free(mr_name);
|
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g_free(as_name);
|
|
}
|
|
|
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return iommu;
|
|
}
|
|
|
|
static AddressSpace *s390_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn)
|
|
{
|
|
S390pciState *s = opaque;
|
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S390PCIIOMMU *iommu = s390_pci_get_iommu(s, bus, devfn);
|
|
|
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return &iommu->as;
|
|
}
|
|
|
|
static uint8_t set_ind_atomic(uint64_t ind_loc, uint8_t to_be_set)
|
|
{
|
|
uint8_t ind_old, ind_new;
|
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hwaddr len = 1;
|
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uint8_t *ind_addr;
|
|
|
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ind_addr = cpu_physical_memory_map(ind_loc, &len, 1);
|
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if (!ind_addr) {
|
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s390_pci_generate_error_event(ERR_EVENT_AIRERR, 0, 0, 0, 0);
|
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return -1;
|
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}
|
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do {
|
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ind_old = *ind_addr;
|
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ind_new = ind_old | to_be_set;
|
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} while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old);
|
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cpu_physical_memory_unmap(ind_addr, len, 1, len);
|
|
|
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return ind_old;
|
|
}
|
|
|
|
static void s390_msi_ctrl_write(void *opaque, hwaddr addr, uint64_t data,
|
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unsigned int size)
|
|
{
|
|
S390PCIBusDevice *pbdev = opaque;
|
|
uint32_t idx = data >> ZPCI_MSI_VEC_BITS;
|
|
uint32_t vec = data & ZPCI_MSI_VEC_MASK;
|
|
uint64_t ind_bit;
|
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uint32_t sum_bit;
|
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uint32_t e = 0;
|
|
|
|
DPRINTF("write_msix data 0x%" PRIx64 " idx %d vec 0x%x\n", data, idx, vec);
|
|
|
|
if (!pbdev) {
|
|
e |= (vec << ERR_EVENT_MVN_OFFSET);
|
|
s390_pci_generate_error_event(ERR_EVENT_NOMSI, idx, 0, addr, e);
|
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return;
|
|
}
|
|
|
|
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)
|
|
{
|
|
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;
|
|
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;
|
|
address_space_destroy(&iommu->as);
|
|
object_unparent(OBJECT(&iommu->mr));
|
|
object_unparent(OBJECT(iommu));
|
|
object_unref(OBJECT(iommu));
|
|
}
|
|
|
|
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);
|
|
pci_setup_iommu(b, s390_pci_dma_iommu, s);
|
|
|
|
bus = BUS(b);
|
|
qbus_set_hotplug_handler(bus, DEVICE(dev), NULL);
|
|
phb->bus = b;
|
|
|
|
s->bus = S390_PCI_BUS(qbus_create(TYPE_S390_PCI_BUS, DEVICE(s), NULL));
|
|
qbus_set_hotplug_handler(BUS(s->bus), DEVICE(s), NULL);
|
|
|
|
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, &error_abort);
|
|
|
|
return 0;
|
|
}
|
|
|
|
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) {
|
|
pbdev->msix.available = false;
|
|
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;
|
|
pbdev->msix.available = true;
|
|
|
|
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)
|
|
{
|
|
DeviceState *dev = NULL;
|
|
|
|
dev = qdev_try_create(BUS(s->bus), TYPE_S390_PCI_DEVICE);
|
|
if (!dev) {
|
|
return NULL;
|
|
}
|
|
|
|
qdev_prop_set_string(dev, "target", target);
|
|
qdev_init_nofail(dev);
|
|
|
|
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;
|
|
s->next_idx = (idx + 1) & FH_MASK_INDEX;
|
|
|
|
return true;
|
|
}
|
|
|
|
static void s390_pcihost_hot_plug(HotplugHandler *hotplug_dev,
|
|
DeviceState *dev, Error **errp)
|
|
{
|
|
PCIDevice *pdev = NULL;
|
|
S390PCIBusDevice *pbdev = NULL;
|
|
S390pciState *s = s390_get_phb();
|
|
|
|
if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) {
|
|
BusState *bus;
|
|
PCIBridge *pb = PCI_BRIDGE(dev);
|
|
PCIDevice *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);
|
|
|
|
bus = BUS(&pb->sec_bus);
|
|
qbus_set_hotplug_handler(bus, DEVICE(s), errp);
|
|
|
|
if (dev->hotplugged) {
|
|
pci_default_write_config(pdev, PCI_PRIMARY_BUS, s->bus_no, 1);
|
|
s->bus_no += 1;
|
|
pci_default_write_config(pdev, PCI_SECONDARY_BUS, s->bus_no, 1);
|
|
do {
|
|
pdev = pdev->bus->parent_dev;
|
|
pci_default_write_config(pdev, PCI_SUBORDINATE_BUS,
|
|
s->bus_no, 1);
|
|
} while (pdev->bus && pci_bus_num(pdev->bus));
|
|
}
|
|
} 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_bus_num(pdev->bus),
|
|
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);
|
|
if (!pbdev) {
|
|
error_setg(errp, "create zpci device failed");
|
|
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, pdev->bus, pdev->devfn);
|
|
pbdev->iommu->pbdev = pbdev;
|
|
pbdev->state = ZPCI_FS_STANDBY;
|
|
|
|
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_RESERVED_TO_STANDBY,
|
|
pbdev->fh, pbdev->fid);
|
|
}
|
|
} else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) {
|
|
pbdev = S390_PCI_DEVICE(dev);
|
|
|
|
if (!s390_pci_alloc_idx(s, pbdev)) {
|
|
error_setg(errp, "no slot for plugging zpci device");
|
|
return;
|
|
}
|
|
pbdev->fh = pbdev->idx;
|
|
QTAILQ_INSERT_TAIL(&s->zpci_devs, pbdev, link);
|
|
g_hash_table_insert(s->zpci_table, &pbdev->idx, pbdev);
|
|
}
|
|
}
|
|
|
|
static void s390_pcihost_timer_cb(void *opaque)
|
|
{
|
|
S390PCIBusDevice *pbdev = opaque;
|
|
|
|
if (pbdev->summary_ind) {
|
|
pci_dereg_irqs(pbdev);
|
|
}
|
|
if (pbdev->iommu->enabled) {
|
|
pci_dereg_ioat(pbdev->iommu);
|
|
}
|
|
|
|
pbdev->state = ZPCI_FS_STANDBY;
|
|
s390_pci_generate_plug_event(HP_EVENT_CONFIGURED_TO_STBRES,
|
|
pbdev->fh, pbdev->fid);
|
|
qdev_unplug(DEVICE(pbdev), NULL);
|
|
}
|
|
|
|
static void s390_pcihost_hot_unplug(HotplugHandler *hotplug_dev,
|
|
DeviceState *dev, Error **errp)
|
|
{
|
|
PCIDevice *pci_dev = NULL;
|
|
PCIBus *bus;
|
|
int32_t devfn;
|
|
S390PCIBusDevice *pbdev = NULL;
|
|
S390pciState *s = s390_get_phb();
|
|
|
|
if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) {
|
|
error_setg(errp, "PCI bridge hot unplug currently not supported");
|
|
return;
|
|
} else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
|
|
pci_dev = PCI_DEVICE(dev);
|
|
|
|
QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) {
|
|
if (pbdev->pdev == pci_dev) {
|
|
break;
|
|
}
|
|
}
|
|
assert(pbdev != NULL);
|
|
} else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) {
|
|
pbdev = S390_PCI_DEVICE(dev);
|
|
pci_dev = pbdev->pdev;
|
|
}
|
|
|
|
switch (pbdev->state) {
|
|
case ZPCI_FS_RESERVED:
|
|
goto out;
|
|
case ZPCI_FS_STANDBY:
|
|
break;
|
|
default:
|
|
s390_pci_generate_plug_event(HP_EVENT_DECONFIGURE_REQUEST,
|
|
pbdev->fh, pbdev->fid);
|
|
pbdev->release_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
|
|
s390_pcihost_timer_cb,
|
|
pbdev);
|
|
timer_mod(pbdev->release_timer,
|
|
qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + HOT_UNPLUG_TIMEOUT);
|
|
return;
|
|
}
|
|
|
|
if (pbdev->release_timer && timer_pending(pbdev->release_timer)) {
|
|
timer_del(pbdev->release_timer);
|
|
timer_free(pbdev->release_timer);
|
|
pbdev->release_timer = NULL;
|
|
}
|
|
|
|
s390_pci_generate_plug_event(HP_EVENT_STANDBY_TO_RESERVED,
|
|
pbdev->fh, pbdev->fid);
|
|
bus = pci_dev->bus;
|
|
devfn = pci_dev->devfn;
|
|
object_unparent(OBJECT(pci_dev));
|
|
s390_pci_msix_free(pbdev);
|
|
s390_pci_iommu_free(s, bus, devfn);
|
|
pbdev->pdev = NULL;
|
|
pbdev->state = ZPCI_FS_RESERVED;
|
|
out:
|
|
pbdev->fid = 0;
|
|
QTAILQ_REMOVE(&s->zpci_devs, pbdev, link);
|
|
g_hash_table_remove(s->zpci_table, &pbdev->idx);
|
|
object_unparent(OBJECT(pbdev));
|
|
}
|
|
|
|
static void s390_pci_enumerate_bridge(PCIBus *bus, PCIDevice *pdev,
|
|
void *opaque)
|
|
{
|
|
S390pciState *s = opaque;
|
|
unsigned int primary = s->bus_no;
|
|
unsigned int subordinate = 0xff;
|
|
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, primary, 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;
|
|
}
|
|
|
|
pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, subordinate, 1);
|
|
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;
|
|
|
|
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)
|
|
{
|
|
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
|
|
|
|
dc->reset = s390_pcihost_reset;
|
|
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 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;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
pbdev->fmb_addr = 0;
|
|
}
|
|
|
|
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 void s390_pci_device_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
|
|
dc->desc = "zpci device";
|
|
dc->reset = s390_pci_device_reset;
|
|
dc->bus_type = TYPE_S390_PCI_BUS;
|
|
dc->realize = s390_pci_device_realize;
|
|
dc->props = s390_pci_device_properties;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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)
|