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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/core/sysbus.h"
17 #include "hw/s390x/adapter.h"
18 #include "hw/virtio/virtio.h"
19 #include "qemu/queue.h"
20 #include "qom/object.h"
21
22 /*
23 * Reserve enough gsis to accommodate all virtio devices.
24 * If any other user of adapter routes needs more of these,
25 * we need to bump the value; but virtio looks like the
26 * maximum right now.
27 */
28 #define ADAPTER_ROUTES_MAX_GSI VIRTIO_QUEUE_MAX
29
30 typedef struct AdapterRoutes {
31 AdapterInfo adapter;
32 int num_routes;
33 int gsi[ADAPTER_ROUTES_MAX_GSI];
34 } AdapterRoutes;
35
36 extern const VMStateDescription vmstate_adapter_routes;
37
38 #define TYPE_S390_FLIC_COMMON "s390-flic"
39 OBJECT_DECLARE_TYPE(S390FLICState, S390FLICStateClass,
40 S390_FLIC_COMMON)
41
42 struct S390FLICState {
43 SysBusDevice parent_obj;
44 bool ais_supported;
45 };
46
47
48 struct S390FLICStateClass {
49 DeviceClass parent_class;
50
51 int (*register_io_adapter)(S390FLICState *fs, uint32_t id, uint8_t isc,
52 bool swap, bool maskable, uint8_t flags);
53 int (*io_adapter_map)(S390FLICState *fs, uint32_t id, uint64_t map_addr,
54 bool do_map);
55 int (*add_adapter_routes)(S390FLICState *fs, AdapterRoutes *routes);
56 void (*release_adapter_routes)(S390FLICState *fs, AdapterRoutes *routes);
57 int (*clear_io_irq)(S390FLICState *fs, uint16_t subchannel_id,
58 uint16_t subchannel_nr);
59 int (*modify_ais_mode)(S390FLICState *fs, uint8_t isc, uint16_t mode);
60 int (*inject_airq)(S390FLICState *fs, uint8_t type, uint8_t isc,
61 uint8_t flags);
62 void (*inject_service)(S390FLICState *fs, uint32_t parm);
63 void (*inject_io)(S390FLICState *fs, uint16_t subchannel_id,
64 uint16_t subchannel_nr, uint32_t io_int_parm,
65 uint32_t io_int_word);
66 void (*inject_crw_mchk)(S390FLICState *fs);
67 };
68
69 #define TYPE_KVM_S390_FLIC "s390-flic-kvm"
70 typedef struct KVMS390FLICState KVMS390FLICState;
71 DECLARE_INSTANCE_CHECKER(KVMS390FLICState, KVM_S390_FLIC,
72 TYPE_KVM_S390_FLIC)
73
74 #define TYPE_QEMU_S390_FLIC "s390-flic-qemu"
75 OBJECT_DECLARE_SIMPLE_TYPE(QEMUS390FLICState, QEMU_S390_FLIC)
76
77 #define SIC_IRQ_MODE_ALL 0
78 #define SIC_IRQ_MODE_SINGLE 1
79 #define AIS_MODE_MASK(isc) (0x80 >> isc)
80
81 #define ISC_TO_PENDING_IO(_isc) (0x80 >> (_isc))
82 #define CR6_TO_PENDING_IO(_cr6) (((_cr6) >> 24) & 0xff)
83
84 /* organize the ISC bits so that the macros above work */
85 #define FLIC_PENDING_IO_ISC7 (1 << 0)
86 #define FLIC_PENDING_IO_ISC6 (1 << 1)
87 #define FLIC_PENDING_IO_ISC5 (1 << 2)
88 #define FLIC_PENDING_IO_ISC4 (1 << 3)
89 #define FLIC_PENDING_IO_ISC3 (1 << 4)
90 #define FLIC_PENDING_IO_ISC2 (1 << 5)
91 #define FLIC_PENDING_IO_ISC1 (1 << 6)
92 #define FLIC_PENDING_IO_ISC0 (1 << 7)
93 #define FLIC_PENDING_SERVICE (1 << 8)
94 #define FLIC_PENDING_MCHK_CR (1 << 9)
95
96 #define FLIC_PENDING_IO (FLIC_PENDING_IO_ISC0 | FLIC_PENDING_IO_ISC1 | \
97 FLIC_PENDING_IO_ISC2 | FLIC_PENDING_IO_ISC3 | \
98 FLIC_PENDING_IO_ISC4 | FLIC_PENDING_IO_ISC5 | \
99 FLIC_PENDING_IO_ISC6 | FLIC_PENDING_IO_ISC7)
100
101 typedef struct QEMUS390FlicIO {
102 uint16_t id;
103 uint16_t nr;
104 uint32_t parm;
105 uint32_t word;
106 QLIST_ENTRY(QEMUS390FlicIO) next;
107 } QEMUS390FlicIO;
108
109 struct QEMUS390FLICState {
110 S390FLICState parent_obj;
111 uint32_t pending;
112 uint32_t service_param;
113 uint8_t simm;
114 uint8_t nimm;
115 QLIST_HEAD(, QEMUS390FlicIO) io[8];
116 bool migrate_all_state;
117 };
118
119 uint32_t qemu_s390_flic_dequeue_service(QEMUS390FLICState *flic);
120 QEMUS390FlicIO *qemu_s390_flic_dequeue_io(QEMUS390FLICState *flic,
121 uint64_t cr6);
122 void qemu_s390_flic_dequeue_crw_mchk(QEMUS390FLICState *flic);
123 bool qemu_s390_flic_has_service(QEMUS390FLICState *flic);
124 bool qemu_s390_flic_has_io(QEMUS390FLICState *fs, uint64_t cr6);
125 bool qemu_s390_flic_has_crw_mchk(QEMUS390FLICState *flic);
126 bool qemu_s390_flic_has_any(QEMUS390FLICState *flic);
127
128 void s390_flic_init(void);
129
130 S390FLICState *s390_get_flic(void);
131 QEMUS390FLICState *s390_get_qemu_flic(S390FLICState *fs);
132 S390FLICStateClass *s390_get_flic_class(S390FLICState *fs);
133 void s390_crw_mchk(void);
134 void s390_io_interrupt(uint16_t subchannel_id, uint16_t subchannel_nr,
135 uint32_t io_int_parm, uint32_t io_int_word);
136 bool ais_needed(void *opaque);
137
138 #endif /* HW_S390_FLIC_H */