[PATCH v6 13/41] Add BCM2838 PCIE Root Complex

[Sergey Kambalin]

Signed-off-by: Sergey Kambalin <sergey.kambalin@auriga.com>
---
 hw/arm/bcm2838_pcie.c         | 82 +++++++++++++++++++++++++++++++++++
 hw/arm/meson.build            |  5 ++-
 include/hw/arm/bcm2838_pcie.h | 53 ++++++++++++++++++++++
 3 files changed, 139 insertions(+), 1 deletion(-)
 create mode 100644 hw/arm/bcm2838_pcie.c
 create mode 100644 include/hw/arm/bcm2838_pcie.h

diff --git a/hw/arm/bcm2838_pcie.c b/hw/arm/bcm2838_pcie.c
new file mode 100644
index 0000000000..cb1370433e
--- /dev/null
+++ b/hw/arm/bcm2838_pcie.c
@@ -0,0 +1,82 @@
+/*
+ * BCM2838 PCIe Root Complex emulation
+ *
+ * Copyright (C) 2022 Ovchinnikov Vitalii <vitalii.ovchinnikov@auriga.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/log.h"
+#include "qapi/error.h"
+#include "hw/irq.h"
+#include "hw/pci-host/gpex.h"
+#include "hw/qdev-properties.h"
+#include "migration/vmstate.h"
+#include "qemu/module.h"
+#include "hw/arm/bcm2838_pcie.h"
+#include "trace.h"
+
+/*
+ * RC root part (D0:F0)
+ */
+
+static void bcm2838_pcie_root_port_reset_hold(Object *obj)
+{
+    PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(obj);
+    PCIDevice *dev = PCI_DEVICE(obj);
+    BCM2838PcieRootState *s = BCM2838_PCIE_ROOT(dev);
+
+    if (rpc->parent_phases.hold) {
+        rpc->parent_phases.hold(obj);
+    }
+
+    memset(s->regs, 0xFF, sizeof(s->regs));
+}
+
+static void bcm2838_pcie_root_init(Object *obj)
+{
+    PCIBridge *br = PCI_BRIDGE(obj);
+    br->bus_name = "pcie.1";
+}
+
+static void bcm2838_pcie_root_class_init(ObjectClass *class, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(class);
+    PCIDeviceClass *k = PCI_DEVICE_CLASS(class);
+    ResettableClass *rc = RESETTABLE_CLASS(class);
+    PCIERootPortClass *rpc = PCIE_ROOT_PORT_CLASS(class);
+
+    dc->desc = "BCM2711 PCIe Bridge";
+    /*
+     * PCI-facing part of the host bridge, not usable without the host-facing
+     * part, which can't be device_add'ed.
+     */
+
+    resettable_class_set_parent_phases(rc, NULL,
+                                       bcm2838_pcie_root_port_reset_hold,
+                                       NULL, &rpc->parent_phases);
+
+    dc->user_creatable = false;
+    k->vendor_id = BCM2838_PCIE_VENDOR_ID;
+    k->device_id = BCM2838_PCIE_DEVICE_ID;
+    k->revision = BCM2838_PCIE_REVISION;
+
+    rpc->exp_offset = BCM2838_PCIE_EXP_CAP_OFFSET;
+    rpc->aer_offset = BCM2838_PCIE_AER_CAP_OFFSET;
+}
+
+static const TypeInfo bcm2838_pcie_root_info = {
+    .name = TYPE_BCM2838_PCIE_ROOT,
+    .parent = TYPE_PCIE_ROOT_PORT,
+    .instance_size = sizeof(BCM2838PcieRootState),
+    .instance_init = bcm2838_pcie_root_init,
+    .class_init = bcm2838_pcie_root_class_init,
+};
+
+static void bcm2838_pcie_register(void)
+{
+    type_register_static(&bcm2838_pcie_root_info);
+}
+
+type_init(bcm2838_pcie_register)
diff --git a/hw/arm/meson.build b/hw/arm/meson.build
index 6808135c1f..39f6df7431 100644
--- a/hw/arm/meson.build
+++ b/hw/arm/meson.build
@@ -30,7 +30,10 @@ arm_ss.add(when: 'CONFIG_ALLWINNER_A10', if_true: 
files('allwinner-a10.c', 'cubi
 arm_ss.add(when: 'CONFIG_ALLWINNER_H3', if_true: files('allwinner-h3.c', 
'orangepi.c'))
 arm_ss.add(when: 'CONFIG_ALLWINNER_R40', if_true: files('allwinner-r40.c', 
'bananapi_m2u.c'))
 arm_ss.add(when: 'CONFIG_RASPI', if_true: files('bcm2836.c', 'raspi.c'))
-arm_ss.add(when: ['CONFIG_RASPI', 'TARGET_AARCH64'], if_true: 
files('bcm2838.c', 'raspi4b.c'))
+arm_ss.add(when: ['CONFIG_RASPI', 'TARGET_AARCH64'], if_true: files(
+  'bcm2838.c',
+  'bcm2838_pcie.c',
+  'raspi4b.c'))
 arm_ss.add(when: 'CONFIG_STM32F100_SOC', if_true: files('stm32f100_soc.c'))
 arm_ss.add(when: 'CONFIG_STM32F205_SOC', if_true: files('stm32f205_soc.c'))
 arm_ss.add(when: 'CONFIG_STM32F405_SOC', if_true: files('stm32f405_soc.c'))
diff --git a/include/hw/arm/bcm2838_pcie.h b/include/hw/arm/bcm2838_pcie.h
new file mode 100644
index 0000000000..39828f817f
--- /dev/null
+++ b/include/hw/arm/bcm2838_pcie.h
@@ -0,0 +1,53 @@
+/*
+ * BCM2838 PCIe Root Complex emulation
+ *
+ * Copyright (C) 2022 Ovchinnikov Vitalii <vitalii.ovchinnikov@auriga.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef BCM2838_PCIE_H
+#define BCM2838_PCIE_H
+
+#include "exec/hwaddr.h"
+#include "hw/sysbus.h"
+#include "hw/pci/pci.h"
+#include "hw/pci/pcie_host.h"
+#include "hw/pci/pcie_port.h"
+#include "qom/object.h"
+
+#define TYPE_BCM2838_PCIE_ROOT "bcm2838-pcie-root"
+OBJECT_DECLARE_TYPE(BCM2838PcieRootState, BCM2838PcieRootClass,
+                    BCM2838_PCIE_ROOT)
+
+#define BCM2838_PCIE_VENDOR_ID      0x14E4
+#define BCM2838_PCIE_DEVICE_ID      0x2711
+#define BCM2838_PCIE_REVISION       20
+
+#define BCM2838_PCIE_REGS_SIZE      0x9310
+#define BCM2838_PCIE_NUM_IRQS       4
+
+#define BCM2838_PCIE_EXP_CAP_OFFSET 0xAC
+#define BCM2838_PCIE_AER_CAP_OFFSET 0x100
+
+#define BCM2838_PCIE_EXT_CFG_DATA   0x8000
+#define BCM2838_PCIE_EXT_CFG_INDEX  0x9000
+
+struct BCM2838PcieRootState {
+    /*< private >*/
+    PCIESlot parent_obj;
+
+    /*< public >*/
+    uint8_t regs[BCM2838_PCIE_REGS_SIZE - PCIE_CONFIG_SPACE_SIZE];
+};
+
+struct BCM2838PcieRootClass {
+    /*< private >*/
+    PCIERootPortClass parent_obj;
+
+    /*< public >*/
+    void (*parent_realize)(PCIDevice *dev, Error **errp);
+};
+
+
+#endif /* BCM2838_PCIE_H */
-- 
2.34.1