[Qemu-devel] [PATCH 2/2] hw/vfio/platform: Add Qualcomm Technologies, Inc HiDMA device support

[Shanker Donthineni <shankerd@codeaurora.org>]

From: Vikram Sethi <vikrams@codeaurora.org>

This patch introduces a Qualcomm Technologies, Inc HiDMA
device and allows the instantiation of the vfio-qcom-hidma
device from the QEMU command line
(-device vfio-qcom-hidma,host="<device>").

A device tree node is created for the guest containing compat,
dma-coherent, reg and interrupts properties.

Signed-off-by: Vikram Sethi <vikrams@codeaurora.org>
Signed-off-by: Shanker Donthineni <shankerd@codeaurora.org>
---
 hw/arm/sysbus-fdt.c               |  2 ++
 hw/vfio/Makefile.objs             |  1 +
 hw/vfio/qcom-hidma.c              | 57 +++++++++++++++++++++++++++++++++++++++
 include/hw/vfio/vfio-qcom-hidma.h | 49 +++++++++++++++++++++++++++++++++
 4 files changed, 109 insertions(+)
 create mode 100644 hw/vfio/qcom-hidma.c
 create mode 100644 include/hw/vfio/vfio-qcom-hidma.h

diff --git a/hw/arm/sysbus-fdt.c b/hw/arm/sysbus-fdt.c
index 6ee7af2..4a7419e 100644
--- a/hw/arm/sysbus-fdt.c
+++ b/hw/arm/sysbus-fdt.c
@@ -28,6 +28,7 @@
 #include "sysemu/sysemu.h"
 #include "hw/vfio/vfio-platform.h"
 #include "hw/vfio/vfio-calxeda-xgmac.h"
+#include "hw/vfio/vfio-qcom-hidma.h"
 #include "hw/arm/fdt.h"
 
 /*
@@ -126,6 +127,7 @@ fail_reg:
 /* list of supported dynamic sysbus devices */
 static const NodeCreationPair add_fdt_node_functions[] = {
     {TYPE_VFIO_CALXEDA_XGMAC, add_generic_platform_fdt_node},
+    {TYPE_VFIO_QCOM_HIDMA, add_generic_platform_fdt_node},
     {"", NULL}, /* last element */
 };
 
diff --git a/hw/vfio/Makefile.objs b/hw/vfio/Makefile.objs
index d324863..9bcb093 100644
--- a/hw/vfio/Makefile.objs
+++ b/hw/vfio/Makefile.objs
@@ -3,4 +3,5 @@ obj-$(CONFIG_SOFTMMU) += common.o
 obj-$(CONFIG_PCI) += pci.o pci-quirks.o
 obj-$(CONFIG_SOFTMMU) += platform.o
 obj-$(CONFIG_SOFTMMU) += calxeda-xgmac.o
+obj-$(CONFIG_SOFTMMU) += qcom-hidma.o
 endif
diff --git a/hw/vfio/qcom-hidma.c b/hw/vfio/qcom-hidma.c
new file mode 100644
index 0000000..04acbd8
--- /dev/null
+++ b/hw/vfio/qcom-hidma.c
@@ -0,0 +1,57 @@
+/*
+ * Qualcomm Technologies, Inc VFIO HiDMA platform device
+ *
+ * Copyright (c) 2016, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include "hw/vfio/vfio-qcom-hidma.h"
+
+static void qcom_hidma_realize(DeviceState *dev, Error **errp)
+{
+    VFIOPlatformDevice *vdev = VFIO_PLATFORM_DEVICE(dev);
+    VFIOQcomHidmaDeviceClass *k = VFIO_QCOM_HIDMA_DEVICE_GET_CLASS(dev);
+
+    vdev->compat = g_strdup("qcom,hidma");
+
+    k->parent_realize(dev, errp);
+}
+
+static const VMStateDescription vfio_platform_vmstate = {
+    .name = TYPE_VFIO_QCOM_HIDMA,
+    .unmigratable = 1,
+};
+
+static void vfio_qcom_hidma_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    VFIOQcomHidmaDeviceClass *vcxc = VFIO_QCOM_HIDMA_DEVICE_CLASS(klass);
+
+    vcxc->parent_realize = dc->realize;
+    dc->realize = qcom_hidma_realize;
+    dc->desc = "VFIO QCOM HIDMA";
+}
+
+static const TypeInfo vfio_qcom_hidma_dev_info = {
+    .name = TYPE_VFIO_QCOM_HIDMA,
+    .parent = TYPE_VFIO_PLATFORM,
+    .instance_size = sizeof(VFIOQcomHidmaDevice),
+    .class_init = vfio_qcom_hidma_class_init,
+    .class_size = sizeof(VFIOQcomHidmaDeviceClass),
+};
+
+static void register_qcom_hidma_dev_type(void)
+{
+    type_register_static(&vfio_qcom_hidma_dev_info);
+}
+
+type_init(register_qcom_hidma_dev_type)
diff --git a/include/hw/vfio/vfio-qcom-hidma.h b/include/hw/vfio/vfio-qcom-hidma.h
new file mode 100644
index 0000000..a7cc8e6
--- /dev/null
+++ b/include/hw/vfio/vfio-qcom-hidma.h
@@ -0,0 +1,49 @@
+/*
+ * Qualcomm Technologies, Inc VFIO HiDMA platform device
+ *
+ * Copyright (c) 2016, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef HW_VFIO_VFIO_QCOM_HIDMA_H
+#define HW_VFIO_VFIO_QCOM_HIDMA_H
+
+#include "hw/vfio/vfio-platform.h"
+
+#define TYPE_VFIO_QCOM_HIDMA "vfio-qcom-hidma"
+
+/**
+ * This device exposes:
+ * - two MMIO regions corresponding to its register space
+ * - 1 IRQ
+ */
+typedef struct VFIOQcomHidmaDevice {
+    VFIOPlatformDevice vdev;
+} VFIOQcomHidmaDevice;
+
+typedef struct VFIOQcomHidmaDeviceClass {
+    /*< private >*/
+    VFIOPlatformDeviceClass parent_class;
+    /*< public >*/
+    DeviceRealize parent_realize;
+} VFIOQcomHidmaDeviceClass;
+
+#define VFIO_QCOM_HIDMA_DEVICE(obj) \
+     OBJECT_CHECK(VFIOQcomHidmaDevice, (obj), TYPE_VFIO_QCOM_HIDMA)
+#define VFIO_QCOM_HIDMA_DEVICE_CLASS(klass) \
+     OBJECT_CLASS_CHECK(VFIOQcomHidmaDeviceClass, (klass), \
+                        TYPE_VFIO_QCOM_HIDMA)
+#define VFIO_QCOM_HIDMA_DEVICE_GET_CLASS(obj) \
+     OBJECT_GET_CLASS(VFIOQcomHidmaDeviceClass, (obj), \
+                      TYPE_VFIO_QCOM_HIDMA)
+
+#endif
-- 
Qualcomm Technologies, Inc. on behalf
of the Qualcomm Innovation Center, Inc.  The Qualcomm Innovation Center, Inc. 
is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.