[PATCH v2 14/19] hw/arm/bcm2838: enable BCM2838 GENET controller

Wire the BCM2838 GENET device (added in the previous patches) into
the SoC: instantiate it in the peripherals block with
qemu_configure_nic_device() so it picks up a -nic/-netdev from the
command line, map its register region at the real BCM2711 physical
offset, and route its two interrupt lines through the GIC. Also stop
raspi4b from masking out the "brcm,bcm2711-genet-v5" device-tree
node, now that the controller it describes is actually implemented.

Adapted from patches 19-29/41 of Sergey Kambalin's Raspberry Pi 4B
series (patchwork series 829638) against current QEMU master.

Signed-off-by: Marcelo Manzo <[email protected]>
---
 hw/arm/bcm2838.c                     |  6 ++++++
 hw/arm/bcm2838_peripherals.c         | 11 +++++++++++
 hw/arm/raspi4b.c                     |  1 -
 include/hw/arm/bcm2838_peripherals.h |  2 ++
 4 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/hw/arm/bcm2838.c b/hw/arm/bcm2838.c
index fc56f87934..f47b96c3bf 100644
--- a/hw/arm/bcm2838.c
+++ b/hw/arm/bcm2838.c
@@ -239,6 +239,12 @@ static void bcm2838_realize(DeviceState *dev, Error **errp)
                                       int_n);
     }
 
+    /* Connect Gigabit Ethernet controller to the interrupt controller */
+    sysbus_connect_irq(SYS_BUS_DEVICE(&ps->genet), 0,
+                       qdev_get_gpio_in(gicdev, GIC_SPI_INTERRUPT_GENET_A));
+    sysbus_connect_irq(SYS_BUS_DEVICE(&ps->genet), 1,
+                       qdev_get_gpio_in(gicdev, GIC_SPI_INTERRUPT_GENET_B));
+
     /* Pass through inbound GPIO lines to the GIC */
     qdev_init_gpio_in(dev, bcm2838_gic_set_irq, GIC_NUM_IRQS);
 
diff --git a/hw/arm/bcm2838_peripherals.c b/hw/arm/bcm2838_peripherals.c
index d923ba968a..012a4567e7 100644
--- a/hw/arm/bcm2838_peripherals.c
+++ b/hw/arm/bcm2838_peripherals.c
@@ -44,6 +44,10 @@ static void bcm2838_peripherals_init(Object *obj)
     object_initialize_child(obj, "pcie-host", &s->pcie_host,
                             TYPE_BCM2838_PCIE_HOST);
 
+    /* Gigabit Ethernet */
+    object_initialize_child(obj, "genet", &s->genet, TYPE_BCM2838_GENET);
+    qemu_configure_nic_device(DEVICE(&s->genet), true, NULL);
+
     /* GPIO */
     object_initialize_child(obj, "gpio", &s->gpio, TYPE_BCM2838_GPIO);
 
@@ -217,6 +221,13 @@ static void bcm2838_peripherals_realize(DeviceState *dev, Error **errp)
     memory_region_add_subregion(get_system_memory(), PCIE_MMIO_ARM_OFFSET,
                                 &s->pcie_mmio_alias);
 
+    /* Gigabit Ethernet */
+    if (!sysbus_realize(SYS_BUS_DEVICE(&s->genet), errp)) {
+        return;
+    }
+    regs_mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->genet), 0);
+    memory_region_add_subregion(&s->peri_low_mr, GENET_OFFSET, regs_mr);
+
     /* GPIO */
     if (!sysbus_realize(SYS_BUS_DEVICE(&s->gpio), errp)) {
         return;
diff --git a/hw/arm/raspi4b.c b/hw/arm/raspi4b.c
index 038eefb234..79f60932f7 100644
--- a/hw/arm/raspi4b.c
+++ b/hw/arm/raspi4b.c
@@ -66,7 +66,6 @@ static void raspi4_modify_dtb(const struct arm_boot_info *info, void *fdt)
     const char *nodes_to_remove[] = {
         "brcm,bcm2711-rng200",
         "brcm,bcm2711-thermal",
-        "brcm,bcm2711-genet-v5",
     };
 
     for (int i = 0; i < ARRAY_SIZE(nodes_to_remove); i++) {
diff --git a/include/hw/arm/bcm2838_peripherals.h b/include/hw/arm/bcm2838_peripherals.h
index 2a4307bed7..deddab50d2 100644
--- a/include/hw/arm/bcm2838_peripherals.h
+++ b/include/hw/arm/bcm2838_peripherals.h
@@ -11,6 +11,7 @@
 
 #include "hw/arm/bcm2835_peripherals.h"
 #include "hw/arm/bcm2838_pcie.h"
+#include "hw/net/bcm2838_genet.h"
 #include "hw/sd/sdhci.h"
 #include "hw/gpio/bcm2838_gpio.h"
 
@@ -70,6 +71,7 @@ struct BCM2838PeripheralState {
     SDHCIState emmc2;
     MemoryRegion pcie_mmio_alias;
     BCM2838PcieHostState pcie_host;
+    BCM2838GenetState genet;
     BCM2838GpioState gpio;
 
     OrIRQState mmc_irq_orgate;
-- 
2.47.1