[Qemu-devel] [PULL 3/5] ahci: split realize and init

[John Snow <jsnow@redhat.com>]

From: Peter Crosthwaite <crosthwaitepeter@gmail.com>

Do the init level tasks asap and the realize later (mainly when
num_ports is available). This allows sub-class realize routines
to work with the device post-init.

Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 1a7c7b2b32e5ccf49373a5065da5ece89730d3ac.1445917756.git.crosthwaite.peter@gmail.com
Signed-off-by: John Snow <jsnow@redhat.com>
---
 hw/ide/ahci.c | 36 +++++++++++++++++++++++-------------
 hw/ide/ahci.h |  3 ++-
 hw/ide/ich.c  | 10 +++++++++-
 3 files changed, 34 insertions(+), 15 deletions(-)

diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c
index 7219189..a3a182b 100644
--- a/hw/ide/ahci.c
+++ b/hw/ide/ahci.c
@@ -1434,24 +1434,26 @@ static const IDEDMAOps ahci_dma_ops = {
     .cmd_done = ahci_cmd_done,
 };
 
-void ahci_init(AHCIState *s, DeviceState *qdev, AddressSpace *as, int ports)
+void ahci_init(AHCIState *s, DeviceState *qdev)
 {
-    qemu_irq *irqs;
-    int i;
-
-    s->as = as;
-    s->ports = ports;
-    s->dev = g_new0(AHCIDevice, ports);
     s->container = qdev;
-    ahci_reg_init(s);
     /* XXX BAR size should be 1k, but that breaks, so bump it to 4k for now */
     memory_region_init_io(&s->mem, OBJECT(qdev), &ahci_mem_ops, s,
                           "ahci", AHCI_MEM_BAR_SIZE);
     memory_region_init_io(&s->idp, OBJECT(qdev), &ahci_idp_ops, s,
                           "ahci-idp", 32);
+}
 
+void ahci_realize(AHCIState *s, DeviceState *qdev, AddressSpace *as, int ports)
+{
+    qemu_irq *irqs;
+    int i;
+
+    s->as = as;
+    s->ports = ports;
+    s->dev = g_new0(AHCIDevice, ports);
+    ahci_reg_init(s);
     irqs = qemu_allocate_irqs(ahci_irq_set, s, s->ports);
-
     for (i = 0; i < s->ports; i++) {
         AHCIDevice *ad = &s->dev[i];
 
@@ -1646,17 +1648,24 @@ static void sysbus_ahci_reset(DeviceState *dev)
     ahci_reset(&s->ahci);
 }
 
-static void sysbus_ahci_realize(DeviceState *dev, Error **errp)
+static void sysbus_ahci_init(Object *obj)
 {
-    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
-    SysbusAHCIState *s = SYSBUS_AHCI(dev);
+    SysbusAHCIState *s = SYSBUS_AHCI(obj);
+    SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
 
-    ahci_init(&s->ahci, dev, &address_space_memory, s->num_ports);
+    ahci_init(&s->ahci, DEVICE(obj));
 
     sysbus_init_mmio(sbd, &s->ahci.mem);
     sysbus_init_irq(sbd, &s->ahci.irq);
 }
 
+static void sysbus_ahci_realize(DeviceState *dev, Error **errp)
+{
+    SysbusAHCIState *s = SYSBUS_AHCI(dev);
+
+    ahci_realize(&s->ahci, dev, &address_space_memory, s->num_ports);
+}
+
 static Property sysbus_ahci_properties[] = {
     DEFINE_PROP_UINT32("num-ports", SysbusAHCIState, num_ports, 1),
     DEFINE_PROP_END_OF_LIST(),
@@ -1677,6 +1686,7 @@ static const TypeInfo sysbus_ahci_info = {
     .name          = TYPE_SYSBUS_AHCI,
     .parent        = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(SysbusAHCIState),
+    .instance_init = sysbus_ahci_init,
     .class_init    = sysbus_ahci_class_init,
 };
 
diff --git a/hw/ide/ahci.h b/hw/ide/ahci.h
index c9b3805..4ccaf5d 100644
--- a/hw/ide/ahci.h
+++ b/hw/ide/ahci.h
@@ -366,7 +366,8 @@ typedef struct SDBFIS {
     uint32_t payload;
 } QEMU_PACKED SDBFIS;
 
-void ahci_init(AHCIState *s, DeviceState *qdev, AddressSpace *as, int ports);
+void ahci_realize(AHCIState *s, DeviceState *qdev, AddressSpace *as, int ports);
+void ahci_init(AHCIState *s, DeviceState *qdev);
 void ahci_uninit(AHCIState *s);
 
 void ahci_reset(AHCIState *s);
diff --git a/hw/ide/ich.c b/hw/ide/ich.c
index 350c7f1..16925fa 100644
--- a/hw/ide/ich.c
+++ b/hw/ide/ich.c
@@ -97,6 +97,13 @@ static void pci_ich9_reset(DeviceState *dev)
     ahci_reset(&d->ahci);
 }
 
+static void pci_ich9_ahci_init(Object *obj)
+{
+    struct AHCIPCIState *d = ICH_AHCI(obj);
+
+    ahci_init(&d->ahci, DEVICE(obj));
+}
+
 static void pci_ich9_ahci_realize(PCIDevice *dev, Error **errp)
 {
     struct AHCIPCIState *d;
@@ -104,7 +111,7 @@ static void pci_ich9_ahci_realize(PCIDevice *dev, Error **errp)
     uint8_t *sata_cap;
     d = ICH_AHCI(dev);
 
-    ahci_init(&d->ahci, DEVICE(dev), pci_get_address_space(dev), 6);
+    ahci_realize(&d->ahci, DEVICE(dev), pci_get_address_space(dev), 6);
 
     pci_config_set_prog_interface(dev->config, AHCI_PROGMODE_MAJOR_REV_1);
 
@@ -171,6 +178,7 @@ static const TypeInfo ich_ahci_info = {
     .name          = TYPE_ICH9_AHCI,
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(AHCIPCIState),
+    .instance_init = pci_ich9_ahci_init,
     .class_init    = ich_ahci_class_init,
 };
 
-- 
2.4.3