[PATCH 11/13] s390x/pci: use a PCI Function structure

[Matthew Rosato <mjrosato@xxxxxxxxxxxxx>]

From: Pierre Morel <pmorel@xxxxxxxxxxxxx>

We use a ClpRspQueryPci structure to hold the information related to a
zPCI Function.

This allows us to be ready to support different zPCI functions and to
retrieve the zPCI function information from the host.

Signed-off-by: Pierre Morel <pmorel@xxxxxxxxxxxxx>
Signed-off-by: Matthew Rosato <mjrosato@xxxxxxxxxxxxx>
Reviewed-by: Cornelia Huck <cohuck@xxxxxxxxxx>
---
 hw/s390x/s390-pci-bus.c         | 12 ++++++++++++
 hw/s390x/s390-pci-inst.c        |  8 ++------
 include/hw/s390x/s390-pci-bus.h |  1 +
 3 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c
index 036cf46..072b56e 100644
--- a/hw/s390x/s390-pci-bus.c
+++ b/hw/s390x/s390-pci-bus.c
@@ -778,6 +778,17 @@ static void s390_pci_init_default_group(void)
     resgrp->version = 0;
 }
 
+static void set_pbdev_info(S390PCIBusDevice *pbdev)
+{
+    pbdev->zpci_fn.sdma = ZPCI_SDMA_ADDR;
+    pbdev->zpci_fn.edma = ZPCI_EDMA_ADDR;
+    pbdev->zpci_fn.pchid = 0;
+    pbdev->zpci_fn.ug = ZPCI_DEFAULT_FN_GRP;
+    pbdev->zpci_fn.fid = pbdev->fid;
+    pbdev->zpci_fn.uid = pbdev->uid;
+    pbdev->pci_group = s390_group_find(ZPCI_DEFAULT_FN_GRP);
+}
+
 static void s390_pcihost_realize(DeviceState *dev, Error **errp)
 {
     PCIBus *b;
@@ -1000,6 +1011,7 @@ static void s390_pcihost_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
         pbdev->iommu = s390_pci_get_iommu(s, pci_get_bus(pdev), pdev->devfn);
         pbdev->iommu->pbdev = pbdev;
         pbdev->state = ZPCI_FS_DISABLED;
+        set_pbdev_info(pbdev);
 
         if (object_dynamic_cast(OBJECT(dev), "vfio-pci")) {
             pbdev->fh |= FH_SHM_VFIO;
diff --git a/hw/s390x/s390-pci-inst.c b/hw/s390x/s390-pci-inst.c
index c25b2a6..58cd041 100644
--- a/hw/s390x/s390-pci-inst.c
+++ b/hw/s390x/s390-pci-inst.c
@@ -281,6 +281,8 @@ int clp_service_call(S390CPU *cpu, uint8_t r2, uintptr_t ra)
             goto out;
         }
 
+        memcpy(resquery, &pbdev->zpci_fn, sizeof(*resquery));
+
         for (i = 0; i < PCI_BAR_COUNT; i++) {
             uint32_t data = pci_get_long(pbdev->pdev->config +
                 PCI_BASE_ADDRESS_0 + (i * 4));
@@ -294,12 +296,6 @@ int clp_service_call(S390CPU *cpu, uint8_t r2, uintptr_t ra)
                     resquery->bar_size[i]);
         }
 
-        stq_p(&resquery->sdma, ZPCI_SDMA_ADDR);
-        stq_p(&resquery->edma, ZPCI_EDMA_ADDR);
-        stl_p(&resquery->fid, pbdev->fid);
-        stw_p(&resquery->pchid, 0);
-        stw_p(&resquery->ug, ZPCI_DEFAULT_FN_GRP);
-        stl_p(&resquery->uid, pbdev->uid);
         stw_p(&resquery->hdr.rsp, CLP_RC_OK);
         break;
     }
diff --git a/include/hw/s390x/s390-pci-bus.h b/include/hw/s390x/s390-pci-bus.h
index 869c0f2..fe36f16 100644
--- a/include/hw/s390x/s390-pci-bus.h
+++ b/include/hw/s390x/s390-pci-bus.h
@@ -342,6 +342,7 @@ struct S390PCIBusDevice {
     uint16_t maxstbl;
     uint8_t sum;
     S390PCIGroup *pci_group;
+    ClpRspQueryPci zpci_fn;
     S390MsixInfo msix;
     AdapterRoutes routes;
     S390PCIIOMMU *iommu;
-- 
1.8.3.1