uninorth: use qdev gpios for PCI IRQs

Currently an object link property is used to pass a reference to the OpenPIC
into the PCI host bridge so that pci_unin_init_irqs() can connect the PCI
IRQs to the PIC itself.

This can be simplified by defining the PCI IRQs as qdev gpios and then wiring
up the PCI IRQs to the PIC in the New World machine init function.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20201013114922.2946-4-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

hw/pci-host/uninorth.c

@@ -32,8 +32,6 @@
 #include "hw/pci-host/uninorth.h"
 #include "trace.h"
 
-static const int unin_irq_line[] = { 0x1b, 0x1c, 0x1d, 0x1e };
-
 static int pci_unin_map_irq(PCIDevice *pci_dev, int irq_num)
 {
     return (irq_num + (pci_dev->devfn >> 3)) & 3;
@@ -43,7 +41,7 @@ static void pci_unin_set_irq(void *opaque, int irq_num, int level)
 {
     UNINHostState *s = opaque;
 
-    trace_unin_set_irq(unin_irq_line[irq_num], level);
+    trace_unin_set_irq(irq_num, level);
     qemu_set_irq(s->irqs[irq_num], level);
 }
 
@@ -112,15 +110,6 @@ static const MemoryRegionOps unin_data_ops = {
     .endianness = DEVICE_LITTLE_ENDIAN,
 };
 
-static void pci_unin_init_irqs(UNINHostState *s)
-{
-    int i;
-
-    for (i = 0; i < ARRAY_SIZE(s->irqs); i++) {
-        s->irqs[i] = qdev_get_gpio_in(DEVICE(s->pic), unin_irq_line[i]);
-    }
-}
-
 static char *pci_unin_main_ofw_unit_address(const SysBusDevice *dev)
 {
     UNINHostState *s = UNI_NORTH_PCI_HOST_BRIDGE(dev);
@@ -141,7 +130,6 @@ static void pci_unin_main_realize(DeviceState *dev, Error **errp)
                                    PCI_DEVFN(11, 0), 4, TYPE_PCI_BUS);
 
     pci_create_simple(h->bus, PCI_DEVFN(11, 0), "uni-north-pci");
-    pci_unin_init_irqs(s);
 
     /* DEC 21154 bridge */
 #if 0
@@ -172,15 +160,12 @@ static void pci_unin_main_init(Object *obj)
                              "unin-pci-hole", &s->pci_mmio,
                              0x80000000ULL, 0x10000000ULL);
 
-    object_property_add_link(obj, "pic", TYPE_OPENPIC,
-                             (Object **) &s->pic,
-                             qdev_prop_allow_set_link_before_realize,
-                             0);
-
     sysbus_init_mmio(sbd, &h->conf_mem);
     sysbus_init_mmio(sbd, &h->data_mem);
     sysbus_init_mmio(sbd, &s->pci_hole);
     sysbus_init_mmio(sbd, &s->pci_io);
+
+    qdev_init_gpio_out(DEVICE(obj), s->irqs, ARRAY_SIZE(s->irqs));
 }
 
 static void pci_u3_agp_realize(DeviceState *dev, Error **errp)
@@ -196,7 +181,6 @@ static void pci_u3_agp_realize(DeviceState *dev, Error **errp)
                                    PCI_DEVFN(11, 0), 4, TYPE_PCI_BUS);
 
     pci_create_simple(h->bus, PCI_DEVFN(11, 0), "u3-agp");
-    pci_unin_init_irqs(s);
 }
 
 static void pci_u3_agp_init(Object *obj)
@@ -220,15 +204,12 @@ static void pci_u3_agp_init(Object *obj)
                              "unin-pci-hole", &s->pci_mmio,
                              0x80000000ULL, 0x70000000ULL);
 
-    object_property_add_link(obj, "pic", TYPE_OPENPIC,
-                             (Object **) &s->pic,
-                             qdev_prop_allow_set_link_before_realize,
-                             0);
-
     sysbus_init_mmio(sbd, &h->conf_mem);
     sysbus_init_mmio(sbd, &h->data_mem);
     sysbus_init_mmio(sbd, &s->pci_hole);
     sysbus_init_mmio(sbd, &s->pci_io);
+
+    qdev_init_gpio_out(DEVICE(obj), s->irqs, ARRAY_SIZE(s->irqs));
 }
 
 static void pci_unin_agp_realize(DeviceState *dev, Error **errp)
@@ -244,7 +225,6 @@ static void pci_unin_agp_realize(DeviceState *dev, Error **errp)
                                    PCI_DEVFN(11, 0), 4, TYPE_PCI_BUS);
 
     pci_create_simple(h->bus, PCI_DEVFN(11, 0), "uni-north-agp");
-    pci_unin_init_irqs(s);
 }
 
 static void pci_unin_agp_init(Object *obj)
@@ -259,13 +239,10 @@ static void pci_unin_agp_init(Object *obj)
     memory_region_init_io(&h->data_mem, OBJECT(h), &pci_host_data_le_ops,
                           obj, "unin-agp-conf-data", 0x1000);
 
-    object_property_add_link(obj, "pic", TYPE_OPENPIC,
-                             (Object **) &s->pic,
-                             qdev_prop_allow_set_link_before_realize,
-                             0);
-
     sysbus_init_mmio(sbd, &h->conf_mem);
     sysbus_init_mmio(sbd, &h->data_mem);
+
+    qdev_init_gpio_out(DEVICE(obj), s->irqs, ARRAY_SIZE(s->irqs));
 }
 
 static void pci_unin_internal_realize(DeviceState *dev, Error **errp)
@@ -281,7 +258,6 @@ static void pci_unin_internal_realize(DeviceState *dev, Error **errp)
                                    PCI_DEVFN(14, 0), 4, TYPE_PCI_BUS);
 
     pci_create_simple(h->bus, PCI_DEVFN(14, 0), "uni-north-internal-pci");
-    pci_unin_init_irqs(s);
 }
 
 static void pci_unin_internal_init(Object *obj)
@@ -296,13 +272,10 @@ static void pci_unin_internal_init(Object *obj)
     memory_region_init_io(&h->data_mem, OBJECT(h), &pci_host_data_le_ops,
                           obj, "unin-pci-conf-data", 0x1000);
 
-    object_property_add_link(obj, "pic", TYPE_OPENPIC,
-                             (Object **) &s->pic,
-                             qdev_prop_allow_set_link_before_realize,
-                             0);
-
     sysbus_init_mmio(sbd, &h->conf_mem);
     sysbus_init_mmio(sbd, &h->data_mem);
+
+    qdev_init_gpio_out(DEVICE(obj), s->irqs, ARRAY_SIZE(s->irqs));
 }
 
 static void unin_main_pci_host_realize(PCIDevice *d, Error **errp)

hw/ppc/mac_newworld.c

@@ -303,8 +303,6 @@ static void ppc_core99_init(MachineState *machine)
         /* 970 gets a U3 bus */
         /* Uninorth AGP bus */
         dev = qdev_new(TYPE_U3_AGP_HOST_BRIDGE);
-        object_property_set_link(OBJECT(dev), "pic", OBJECT(pic_dev),
-                                 &error_abort);
         sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
         uninorth_pci = U3_AGP_HOST_BRIDGE(dev);
         s = SYS_BUS_DEVICE(dev);
@@ -317,32 +315,38 @@ static void ppc_core99_init(MachineState *machine)
         sysbus_mmio_map(s, 0, 0xf0800000);
         sysbus_mmio_map(s, 1, 0xf0c00000);
 
+        for (i = 0; i < 4; i++) {
+            qdev_connect_gpio_out(dev, i, qdev_get_gpio_in(pic_dev, 0x1b + i));
+        }
+
         machine_arch = ARCH_MAC99_U3;
     } else {
         /* Use values found on a real PowerMac */
         /* Uninorth AGP bus */
         dev = qdev_new(TYPE_UNI_NORTH_AGP_HOST_BRIDGE);
-        object_property_set_link(OBJECT(dev), "pic", OBJECT(pic_dev),
-                                 &error_abort);
         s = SYS_BUS_DEVICE(dev);
         sysbus_realize_and_unref(s, &error_fatal);
         sysbus_mmio_map(s, 0, 0xf0800000);
         sysbus_mmio_map(s, 1, 0xf0c00000);
 
+        for (i = 0; i < 4; i++) {
+            qdev_connect_gpio_out(dev, i, qdev_get_gpio_in(pic_dev, 0x1b + i));
+        }
+
         /* Uninorth internal bus */
         dev = qdev_new(TYPE_UNI_NORTH_INTERNAL_PCI_HOST_BRIDGE);
-        object_property_set_link(OBJECT(dev), "pic", OBJECT(pic_dev),
-                                 &error_abort);
         s = SYS_BUS_DEVICE(dev);
         sysbus_realize_and_unref(s, &error_fatal);
         sysbus_mmio_map(s, 0, 0xf4800000);
         sysbus_mmio_map(s, 1, 0xf4c00000);
 
+        for (i = 0; i < 4; i++) {
+            qdev_connect_gpio_out(dev, i, qdev_get_gpio_in(pic_dev, 0x1b + i));
+        }
+
         /* Uninorth main bus */
         dev = qdev_new(TYPE_UNI_NORTH_PCI_HOST_BRIDGE);
         qdev_prop_set_uint32(dev, "ofw-addr", 0xf2000000);
-        object_property_set_link(OBJECT(dev), "pic", OBJECT(pic_dev),
-                                 &error_abort);
         sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
         uninorth_pci = UNI_NORTH_PCI_HOST_BRIDGE(dev);
         s = SYS_BUS_DEVICE(dev);
@@ -355,6 +359,10 @@ static void ppc_core99_init(MachineState *machine)
         sysbus_mmio_map(s, 0, 0xf2800000);
         sysbus_mmio_map(s, 1, 0xf2c00000);
 
+        for (i = 0; i < 4; i++) {
+            qdev_connect_gpio_out(dev, i, qdev_get_gpio_in(pic_dev, 0x1b + i));
+        }
+
         machine_arch = ARCH_MAC99;
     }
 

include/hw/pci-host/uninorth.h

@@ -26,7 +26,6 @@
 #define UNINORTH_H
 
 #include "hw/pci/pci_host.h"
-#include "hw/ppc/openpic.h"
 #include "qom/object.h"
 
 /* UniNorth version */
@@ -51,7 +50,6 @@ struct UNINHostState {
     PCIHostState parent_obj;
 
     uint32_t ofw_addr;
-    OpenPICState *pic;
     qemu_irq irqs[4];
     MemoryRegion pci_mmio;
     MemoryRegion pci_hole;