include/hw/s390x/s390_flic.h

   1 /*
   2  * QEMU S390x floating interrupt controller (flic)
   3  *
   4  * Copyright 2014 IBM Corp.
   5  * Author(s): Jens Freimann <jfrei@linux.vnet.ibm.com>
   6  *            Cornelia Huck <cornelia.huck@de.ibm.com>
   7  *
   8  * This work is licensed under the terms of the GNU GPL, version 2 or (at
   9  * your option) any later version. See the COPYING file in the top-level
  10  * directory.
  11  */
  12
  13 #ifndef HW_S390_FLIC_H
  14 #define HW_S390_FLIC_H
  15
  16 #include "hw/sysbus.h"
  17 #include "hw/s390x/adapter.h"
  18 #include "hw/virtio/virtio.h"
  19
  20 /*
  21  * Reserve enough gsis to accommodate all virtio devices.
  22  * If any other user of adapter routes needs more of these,
  23  * we need to bump the value; but virtio looks like the
  24  * maximum right now.
  25  */
  26 #define ADAPTER_ROUTES_MAX_GSI VIRTIO_QUEUE_MAX
  27 #define VIRTIO_CCW_QUEUE_MAX 64
  28
  29 typedef struct AdapterRoutes {
  30     AdapterInfo adapter;
  31     int num_routes;
  32     int gsi[ADAPTER_ROUTES_MAX_GSI];
  33 } AdapterRoutes;
  34
  35 #define TYPE_S390_FLIC_COMMON "s390-flic"
  36 #define S390_FLIC_COMMON(obj) \
  37     OBJECT_CHECK(S390FLICState, (obj), TYPE_S390_FLIC_COMMON)
  38
  39 typedef struct S390FLICState {
  40     SysBusDevice parent_obj;
  41     /* to limit AdapterRoutes.num_routes for compat */
  42     uint32_t adapter_routes_max_batch;
  43
  44 } S390FLICState;
  45
  46 #define S390_FLIC_COMMON_CLASS(klass) \
  47     OBJECT_CLASS_CHECK(S390FLICStateClass, (klass), TYPE_S390_FLIC_COMMON)
  48 #define S390_FLIC_COMMON_GET_CLASS(obj) \
  49     OBJECT_GET_CLASS(S390FLICStateClass, (obj), TYPE_S390_FLIC_COMMON)
  50
  51 typedef struct S390FLICStateClass {
  52     DeviceClass parent_class;
  53
  54     int (*register_io_adapter)(S390FLICState *fs, uint32_t id, uint8_t isc,
  55                                bool swap, bool maskable);
  56     int (*io_adapter_map)(S390FLICState *fs, uint32_t id, uint64_t map_addr,
  57                           bool do_map);
  58     int (*add_adapter_routes)(S390FLICState *fs, AdapterRoutes *routes);
  59     void (*release_adapter_routes)(S390FLICState *fs, AdapterRoutes *routes);
  60     int (*clear_io_irq)(S390FLICState *fs, uint16_t subchannel_id,
  61                         uint16_t subchannel_nr);
  62 } S390FLICStateClass;
  63
  64 #define TYPE_KVM_S390_FLIC "s390-flic-kvm"
  65 #define KVM_S390_FLIC(obj) \
  66     OBJECT_CHECK(KVMS390FLICState, (obj), TYPE_KVM_S390_FLIC)
  67
  68 #define TYPE_QEMU_S390_FLIC "s390-flic-qemu"
  69 #define QEMU_S390_FLIC(obj) \
  70     OBJECT_CHECK(QEMUS390FLICState, (obj), TYPE_QEMU_S390_FLIC)
  71
  72 typedef struct QEMUS390FLICState {
  73     S390FLICState parent_obj;
  74 } QEMUS390FLICState;
  75
  76 void s390_flic_init(void);
  77
  78 S390FLICState *s390_get_flic(void);
  79
  80 #ifdef CONFIG_KVM
  81 DeviceState *s390_flic_kvm_create(void);
  82 #else
  83 static inline DeviceState *s390_flic_kvm_create(void)
  84 {
  85     return NULL;
  86 }
  87 #endif
  88
  89 #endif /* HW_S390_FLIC_H */