661 lines
18 KiB
C
661 lines
18 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 "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/msi.h>
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#include <qemu/error-report.h>
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/* #define DEBUG_S390PCI_BUS */
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#ifdef DEBUG_S390PCI_BUS
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#define DPRINTF(fmt, ...) \
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do { fprintf(stderr, "S390pci-bus: " fmt, ## __VA_ARGS__); } while (0)
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#else
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#define DPRINTF(fmt, ...) \
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do { } while (0)
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#endif
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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_PCI_HOST_BRIDGE(
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object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL));
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if (!s) {
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return rc;
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}
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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_PCI_HOST_BRIDGE(
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object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL));
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if (!s) {
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return 0;
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}
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return !QTAILQ_EMPTY(&s->pending_sei);
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}
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S390PCIBusDevice *s390_pci_find_dev_by_fid(uint32_t fid)
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{
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S390PCIBusDevice *pbdev;
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int i;
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S390pciState *s = S390_PCI_HOST_BRIDGE(
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object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL));
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if (!s) {
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return NULL;
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}
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for (i = 0; i < PCI_SLOT_MAX; i++) {
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pbdev = &s->pbdev[i];
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if ((pbdev->fh != 0) && (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(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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if (pbdev->configured) {
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rc = SCLP_RC_NO_ACTION_REQUIRED;
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} else {
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pbdev->configured = true;
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rc = SCLP_RC_NORMAL_COMPLETION;
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}
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} else {
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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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}
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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(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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if (!pbdev->configured) {
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rc = SCLP_RC_NO_ACTION_REQUIRED;
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} else {
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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);
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}
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pbdev->configured = false;
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rc = SCLP_RC_NORMAL_COMPLETION;
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}
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} else {
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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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}
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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 uint32_t s390_pci_get_pfid(PCIDevice *pdev)
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{
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return PCI_SLOT(pdev->devfn);
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}
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static uint32_t s390_pci_get_pfh(PCIDevice *pdev)
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{
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return PCI_SLOT(pdev->devfn) | FH_VIRT;
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}
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S390PCIBusDevice *s390_pci_find_dev_by_idx(uint32_t idx)
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{
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S390PCIBusDevice *pbdev;
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int i;
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int j = 0;
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S390pciState *s = S390_PCI_HOST_BRIDGE(
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object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL));
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if (!s) {
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return NULL;
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}
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for (i = 0; i < PCI_SLOT_MAX; i++) {
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pbdev = &s->pbdev[i];
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if (pbdev->fh == 0) {
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continue;
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}
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if (j == idx) {
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return pbdev;
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}
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j++;
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}
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return NULL;
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}
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S390PCIBusDevice *s390_pci_find_dev_by_fh(uint32_t fh)
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{
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S390PCIBusDevice *pbdev;
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int i;
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S390pciState *s = S390_PCI_HOST_BRIDGE(
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object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL));
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if (!s || !fh) {
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return NULL;
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}
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for (i = 0; i < PCI_SLOT_MAX; i++) {
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pbdev = &s->pbdev[i];
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if (pbdev->fh == fh) {
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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 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_PCI_HOST_BRIDGE(
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object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL));
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if (!s) {
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return;
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}
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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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static void s390_pci_generate_error_event(uint16_t pec, uint32_t fh,
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uint32_t fid, uint64_t faddr,
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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(MemoryRegion *iommu, hwaddr addr,
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bool is_write)
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{
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uint64_t pte;
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uint32_t flags;
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S390PCIBusDevice *pbdev = container_of(iommu, S390PCIBusDevice, iommu_mr);
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S390pciState *s;
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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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if (!pbdev->configured || !pbdev->pdev ||
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!(pbdev->fh & FH_ENABLED) || !pbdev->iommu_enabled) {
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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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s = S390_PCI_HOST_BRIDGE(pci_device_root_bus(pbdev->pdev)->qbus.parent);
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/* s390 does not have an APIC mapped to main storage so we use
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* a separate AddressSpace only for msix notifications
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*/
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if (addr == ZPCI_MSI_ADDR) {
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ret.target_as = &s->msix_notify_as;
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ret.iova = addr;
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ret.translated_addr = addr;
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ret.addr_mask = 0xfff;
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ret.perm = IOMMU_RW;
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return ret;
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}
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if (!pbdev->g_iota) {
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pbdev->error_state = true;
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pbdev->lgstg_blocked = true;
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s390_pci_generate_error_event(ERR_EVENT_INVALAS, pbdev->fh, pbdev->fid,
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addr, 0);
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return ret;
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}
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if (addr < pbdev->pba || addr > pbdev->pal) {
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pbdev->error_state = true;
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pbdev->lgstg_blocked = true;
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s390_pci_generate_error_event(ERR_EVENT_OORANGE, pbdev->fh, pbdev->fid,
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addr, 0);
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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(pbdev->g_iota),
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addr);
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if (!pte) {
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pbdev->error_state = true;
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pbdev->lgstg_blocked = true;
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s390_pci_generate_error_event(ERR_EVENT_SERR, pbdev->fh, pbdev->fid,
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addr, ERR_EVENT_Q_BIT);
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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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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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return ret;
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}
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static const MemoryRegionIOMMUOps s390_iommu_ops = {
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.translate = s390_translate_iommu,
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};
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static AddressSpace *s390_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn)
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{
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S390pciState *s = opaque;
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return &s->pbdev[PCI_SLOT(devfn)].as;
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}
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static uint8_t set_ind_atomic(uint64_t ind_loc, uint8_t to_be_set)
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{
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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;
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}
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static void s390_msi_ctrl_write(void *opaque, hwaddr addr, uint64_t data,
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unsigned int size)
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{
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S390PCIBusDevice *pbdev;
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uint32_t io_int_word;
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uint32_t fid = data >> ZPCI_MSI_VEC_BITS;
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uint32_t vec = data & ZPCI_MSI_VEC_MASK;
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uint64_t ind_bit;
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uint32_t sum_bit;
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uint32_t e = 0;
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DPRINTF("write_msix data 0x%" PRIx64 " fid %d vec 0x%x\n", data, fid, vec);
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pbdev = s390_pci_find_dev_by_fid(fid);
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if (!pbdev) {
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e |= (vec << ERR_EVENT_MVN_OFFSET);
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s390_pci_generate_error_event(ERR_EVENT_NOMSI, 0, fid, addr, e);
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return;
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}
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if (!(pbdev->fh & FH_ENABLED)) {
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return;
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}
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ind_bit = pbdev->routes.adapter.ind_offset;
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sum_bit = pbdev->routes.adapter.summary_offset;
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set_ind_atomic(pbdev->routes.adapter.ind_addr + (ind_bit + vec) / 8,
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0x80 >> ((ind_bit + vec) % 8));
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if (!set_ind_atomic(pbdev->routes.adapter.summary_addr + sum_bit / 8,
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0x80 >> (sum_bit % 8))) {
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io_int_word = (pbdev->isc << 27) | IO_INT_WORD_AI;
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s390_io_interrupt(0, 0, 0, io_int_word);
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}
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}
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static uint64_t s390_msi_ctrl_read(void *opaque, hwaddr addr, unsigned size)
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{
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return 0xffffffff;
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}
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static const MemoryRegionOps s390_msi_ctrl_ops = {
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.write = s390_msi_ctrl_write,
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.read = s390_msi_ctrl_read,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
};
|
|
|
|
void s390_pci_iommu_enable(S390PCIBusDevice *pbdev)
|
|
{
|
|
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);
|
|
pbdev->iommu_enabled = true;
|
|
}
|
|
|
|
void s390_pci_iommu_disable(S390PCIBusDevice *pbdev)
|
|
{
|
|
memory_region_del_subregion(&pbdev->mr, &pbdev->iommu_mr);
|
|
object_unparent(OBJECT(&pbdev->iommu_mr));
|
|
pbdev->iommu_enabled = false;
|
|
}
|
|
|
|
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)
|