Initial VFIO platform device support, v2 (Eric Auger, et al.)

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Merge remote-tracking branch 'remotes/awilliam/tags/vfio-update-20150609.0' into staging

Initial VFIO platform device support, v2 (Eric Auger, et al.)

# gpg: Signature made Tue Jun  9 15:25:40 2015 BST using RSA key ID 3BB08B22
# gpg: Good signature from "Alex Williamson <alex.williamson@redhat.com>"
# gpg:                 aka "Alex Williamson <alex@shazbot.org>"
# gpg:                 aka "Alex Williamson <alwillia@redhat.com>"
# gpg:                 aka "Alex Williamson <alex.l.williamson@gmail.com>"

* remotes/awilliam/tags/vfio-update-20150609.0:
  hw/vfio/platform: calxeda xgmac device
  hw/vfio/platform: add irq assignment
  hw/vfio/platform: vfio-platform skeleton

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

include/hw/vfio/vfio-calxeda-xgmac.h

@@ -0,0 +1,46 @@
+/*
+ * VFIO calxeda xgmac device
+ *
+ * Copyright Linaro Limited, 2014
+ *
+ * Authors:
+ *  Eric Auger <eric.auger@linaro.org>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef HW_VFIO_VFIO_CALXEDA_XGMAC_H
+#define HW_VFIO_VFIO_CALXEDA_XGMAC_H
+
+#include "hw/vfio/vfio-platform.h"
+
+#define TYPE_VFIO_CALXEDA_XGMAC "vfio-calxeda-xgmac"
+
+/**
+ * This device exposes:
+ * - a single MMIO region corresponding to its register space
+ * - 3 IRQS (main and 2 power related IRQs)
+ */
+typedef struct VFIOCalxedaXgmacDevice {
+    VFIOPlatformDevice vdev;
+} VFIOCalxedaXgmacDevice;
+
+typedef struct VFIOCalxedaXgmacDeviceClass {
+    /*< private >*/
+    VFIOPlatformDeviceClass parent_class;
+    /*< public >*/
+    DeviceRealize parent_realize;
+} VFIOCalxedaXgmacDeviceClass;
+
+#define VFIO_CALXEDA_XGMAC_DEVICE(obj) \
+     OBJECT_CHECK(VFIOCalxedaXgmacDevice, (obj), TYPE_VFIO_CALXEDA_XGMAC)
+#define VFIO_CALXEDA_XGMAC_DEVICE_CLASS(klass) \
+     OBJECT_CLASS_CHECK(VFIOCalxedaXgmacDeviceClass, (klass), \
+                        TYPE_VFIO_CALXEDA_XGMAC)
+#define VFIO_CALXEDA_XGMAC_DEVICE_GET_CLASS(obj) \
+     OBJECT_GET_CLASS(VFIOCalxedaXgmacDeviceClass, (obj), \
+                      TYPE_VFIO_CALXEDA_XGMAC)
+
+#endif

include/hw/vfio/vfio-common.h

@@ -42,6 +42,7 @@
 
 enum {
     VFIO_DEVICE_TYPE_PCI = 0,
+    VFIO_DEVICE_TYPE_PLATFORM = 1,
 };
 
 typedef struct VFIORegion {

include/hw/vfio/vfio-platform.h

@@ -0,0 +1,75 @@
+/*
+ * vfio based device assignment support - platform devices
+ *
+ * Copyright Linaro Limited, 2014
+ *
+ * Authors:
+ *  Kim Phillips <kim.phillips@linaro.org>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ * Based on vfio based PCI device assignment support:
+ *  Copyright Red Hat, Inc. 2012
+ */
+
+#ifndef HW_VFIO_VFIO_PLATFORM_H
+#define HW_VFIO_VFIO_PLATFORM_H
+
+#include "hw/sysbus.h"
+#include "hw/vfio/vfio-common.h"
+#include "qemu/event_notifier.h"
+#include "qemu/queue.h"
+#include "hw/irq.h"
+
+#define TYPE_VFIO_PLATFORM "vfio-platform"
+
+enum {
+    VFIO_IRQ_INACTIVE = 0,
+    VFIO_IRQ_PENDING = 1,
+    VFIO_IRQ_ACTIVE = 2,
+    /* VFIO_IRQ_ACTIVE_AND_PENDING cannot happen with VFIO */
+};
+
+typedef struct VFIOINTp {
+    QLIST_ENTRY(VFIOINTp) next; /* entry for IRQ list */
+    QSIMPLEQ_ENTRY(VFIOINTp) pqnext; /* entry for pending IRQ queue */
+    EventNotifier interrupt; /* eventfd triggered on interrupt */
+    EventNotifier unmask; /* eventfd for unmask on QEMU bypass */
+    qemu_irq qemuirq;
+    struct VFIOPlatformDevice *vdev; /* back pointer to device */
+    int state; /* inactive, pending, active */
+    uint8_t pin; /* index */
+    uint32_t flags; /* IRQ info flags */
+} VFIOINTp;
+
+/* function type for user side eventfd handler */
+typedef void (*eventfd_user_side_handler_t)(VFIOINTp *intp);
+
+typedef struct VFIOPlatformDevice {
+    SysBusDevice sbdev;
+    VFIODevice vbasedev; /* not a QOM object */
+    VFIORegion **regions;
+    QLIST_HEAD(, VFIOINTp) intp_list; /* list of IRQs */
+    /* queue of pending IRQs */
+    QSIMPLEQ_HEAD(pending_intp_queue, VFIOINTp) pending_intp_queue;
+    char *compat; /* compatibility string */
+    uint32_t mmap_timeout; /* delay to re-enable mmaps after interrupt */
+    QEMUTimer *mmap_timer; /* allows fast-path resume after IRQ hit */
+    QemuMutex intp_mutex; /* protect the intp_list IRQ state */
+} VFIOPlatformDevice;
+
+typedef struct VFIOPlatformDeviceClass {
+    /*< private >*/
+    SysBusDeviceClass parent_class;
+    /*< public >*/
+} VFIOPlatformDeviceClass;
+
+#define VFIO_PLATFORM_DEVICE(obj) \
+     OBJECT_CHECK(VFIOPlatformDevice, (obj), TYPE_VFIO_PLATFORM)
+#define VFIO_PLATFORM_DEVICE_CLASS(klass) \
+     OBJECT_CLASS_CHECK(VFIOPlatformDeviceClass, (klass), TYPE_VFIO_PLATFORM)
+#define VFIO_PLATFORM_DEVICE_GET_CLASS(obj) \
+     OBJECT_GET_CLASS(VFIOPlatformDeviceClass, (obj), TYPE_VFIO_PLATFORM)
+
+#endif /*HW_VFIO_VFIO_PLATFORM_H*/