[Qemu-devel] [PATCH v4 05/12] spapr_pci: convert init to realize

[Alexey Kardashevskiy <aik@ozlabs.ru>]

This converts init() callback to realize(). The conversion includes:
1. change of prototype;
2. conversion of fprintf to error_setg;
3. introducing a finish_realize() callback which at the moment
does IOMMU setup.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
---
 hw/ppc/spapr_pci.c          | 82 +++++++++++++++++++++++++++------------------
 include/hw/pci-host/spapr.h | 18 ++++++++--
 2 files changed, 66 insertions(+), 34 deletions(-)

diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index 9b6ee32..11bb737 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -32,6 +32,7 @@
 #include "exec/address-spaces.h"
 #include <libfdt.h>
 #include "trace.h"
+#include "qemu/error-report.h"
 
 #include "hw/pci/pci_bus.h"
 
@@ -483,15 +484,17 @@ static AddressSpace *spapr_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn)
     return &phb->iommu_as;
 }
 
-static int spapr_phb_init(SysBusDevice *s)
+static void spapr_phb_realize(DeviceState *dev, Error **errp)
 {
-    DeviceState *dev = DEVICE(s);
+    SysBusDevice *s = SYS_BUS_DEVICE(dev);
     sPAPRPHBState *sphb = SPAPR_PCI_HOST_BRIDGE(s);
     PCIHostState *phb = PCI_HOST_BRIDGE(s);
+    sPAPRPHBClass *info = SPAPR_PCI_HOST_BRIDGE_GET_CLASS(s);
     const char *busname;
     char *namebuf;
     int i;
     PCIBus *bus;
+    Error *error = NULL;
 
     if (sphb->index != -1) {
         hwaddr windows_base;
@@ -499,9 +502,9 @@ static int spapr_phb_init(SysBusDevice *s)
         if ((sphb->buid != -1) || (sphb->dma_liobn != -1)
             || (sphb->mem_win_addr != -1)
             || (sphb->io_win_addr != -1)) {
-            fprintf(stderr, "Either \"index\" or other parameters must"
-                    " be specified for PAPR PHB, not both\n");
-            return -1;
+            error_setg(errp, "Either \"index\" or other parameters must"
+                       " be specified for PAPR PHB, not both");
+            return;
         }
 
         sphb->buid = SPAPR_PCI_BASE_BUID + sphb->index;
@@ -514,28 +517,28 @@ static int spapr_phb_init(SysBusDevice *s)
     }
 
     if (sphb->buid == -1) {
-        fprintf(stderr, "BUID not specified for PHB\n");
-        return -1;
+        error_setg(errp, "BUID not specified for PHB");
+        return;
     }
 
     if (sphb->dma_liobn == -1) {
-        fprintf(stderr, "LIOBN not specified for PHB\n");
-        return -1;
+        error_setg(errp, "LIOBN not specified for PHB");
+        return;
     }
 
     if (sphb->mem_win_addr == -1) {
-        fprintf(stderr, "Memory window address not specified for PHB\n");
-        return -1;
+        error_setg(errp, "Memory window address not specified for PHB");
+        return;
     }
 
     if (sphb->io_win_addr == -1) {
-        fprintf(stderr, "IO window address not specified for PHB\n");
-        return -1;
+        error_setg(errp, "IO window address not specified for PHB");
+        return;
     }
 
     if (find_phb(spapr, sphb->buid)) {
-        fprintf(stderr, "PCI host bridges must have unique BUIDs\n");
-        return -1;
+        error_setg(errp, "PCI host bridges must have unique BUIDs");
+        return;
     }
 
     sphb->dtbusname = g_strdup_printf("pci@%" PRIx64, sphb->buid);
@@ -597,19 +600,6 @@ static int spapr_phb_init(SysBusDevice *s)
                            PCI_DEVFN(0, 0), PCI_NUM_PINS, TYPE_PCI_BUS);
     phb->bus = bus;
 
-    sphb->dma_window_start = 0;
-    sphb->dma_window_size = 0x40000000;
-    sphb->tcet = spapr_tce_new_table(dev, sphb->dma_liobn,
-                                     sphb->dma_window_size);
-    if (!sphb->tcet) {
-        fprintf(stderr, "Unable to create TCE table for %s\n", sphb->dtbusname);
-        return -1;
-    }
-    address_space_init(&sphb->iommu_as, spapr_tce_get_iommu(sphb->tcet),
-                       sphb->dtbusname);
-
-    pci_setup_iommu(bus, spapr_pci_dma_iommu, sphb);
-
     QLIST_INSERT_HEAD(&spapr->phbs, sphb, list);
 
     /* Initialize the LSI table */
@@ -618,13 +608,39 @@ static int spapr_phb_init(SysBusDevice *s)
 
         irq = spapr_allocate_lsi(0);
         if (!irq) {
-            return -1;
+            error_setg(errp, "spapr_allocate_lsi failed");
+            return;
         }
 
         sphb->lsi_table[i].irq = irq;
     }
 
-    return 0;
+    if (!info->finish_realize) {
+        error_setg(errp, "finish_realize not defined");
+        return;
+    }
+    info->finish_realize(sphb, &error);
+    if (error) {
+        error_propagate(errp, error);
+        return;
+    }
+
+    pci_setup_iommu(sphb->parent_obj.bus, spapr_pci_dma_iommu, sphb);
+}
+
+static void spapr_phb_finish_realize(sPAPRPHBState *sphb, Error **errp)
+{
+    sphb->dma_window_start = 0;
+    sphb->dma_window_size = 0x40000000;
+    sphb->tcet = spapr_tce_new_table(DEVICE(sphb), sphb->dma_liobn,
+                                     sphb->dma_window_size);
+    if (!sphb->tcet) {
+        error_setg(errp, "Unable to create TCE table for %s",
+                   sphb->dtbusname);
+        return ;
+    }
+    address_space_init(&sphb->iommu_as, spapr_tce_get_iommu(sphb->tcet),
+                       sphb->dtbusname);
 }
 
 static void spapr_phb_reset(DeviceState *qdev)
@@ -707,14 +723,15 @@ static const char *spapr_phb_root_bus_path(PCIHostState *host_bridge,
 static void spapr_phb_class_init(ObjectClass *klass, void *data)
 {
     PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
-    SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
+    sPAPRPHBClass *spc = SPAPR_PCI_HOST_BRIDGE_CLASS(klass);
 
     hc->root_bus_path = spapr_phb_root_bus_path;
-    sdc->init = spapr_phb_init;
+    dc->realize = spapr_phb_realize;
     dc->props = spapr_phb_properties;
     dc->reset = spapr_phb_reset;
     dc->vmsd = &vmstate_spapr_pci;
+    spc->finish_realize = spapr_phb_finish_realize;
 }
 
 static const TypeInfo spapr_phb_info = {
@@ -722,6 +739,7 @@ static const TypeInfo spapr_phb_info = {
     .parent        = TYPE_PCI_HOST_BRIDGE,
     .instance_size = sizeof(sPAPRPHBState),
     .class_init    = spapr_phb_class_init,
+    .class_size    = sizeof(sPAPRPHBClass),
 };
 
 PCIHostState *spapr_create_phb(sPAPREnvironment *spapr, int index)
diff --git a/include/hw/pci-host/spapr.h b/include/hw/pci-host/spapr.h
index 970b4a9..0f428a1 100644
--- a/include/hw/pci-host/spapr.h
+++ b/include/hw/pci-host/spapr.h
@@ -34,7 +34,21 @@
 #define SPAPR_PCI_HOST_BRIDGE(obj) \
     OBJECT_CHECK(sPAPRPHBState, (obj), TYPE_SPAPR_PCI_HOST_BRIDGE)
 
-typedef struct sPAPRPHBState {
+#define SPAPR_PCI_HOST_BRIDGE_CLASS(klass) \
+     OBJECT_CLASS_CHECK(sPAPRPHBClass, (klass), TYPE_SPAPR_PCI_HOST_BRIDGE)
+#define SPAPR_PCI_HOST_BRIDGE_GET_CLASS(obj) \
+     OBJECT_GET_CLASS(sPAPRPHBClass, (obj), TYPE_SPAPR_PCI_HOST_BRIDGE)
+
+typedef struct sPAPRPHBClass sPAPRPHBClass;
+typedef struct sPAPRPHBState sPAPRPHBState;
+
+struct sPAPRPHBClass {
+    PCIHostBridgeClass parent_class;
+
+    void (*finish_realize)(sPAPRPHBState *sphb, Error **errp);
+};
+
+struct sPAPRPHBState {
     PCIHostState parent_obj;
 
     int32_t index;
@@ -62,7 +76,7 @@ typedef struct sPAPRPHBState {
     } msi_table[SPAPR_MSIX_MAX_DEVS];
 
     QLIST_ENTRY(sPAPRPHBState) list;
-} sPAPRPHBState;
+};
 
 #define SPAPR_PCI_BASE_BUID          0x800000020000000ULL
 
-- 
1.8.4.rc4