1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
/*
* SCLP Support
*
* Copyright IBM, Corp. 2012
*
* Authors:
* Christian Borntraeger <borntraeger@de.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or (at your
* option) any later version. See the COPYING file in the top-level directory.
*
*/
#ifndef HW_S390_SCLP_H
#define HW_S390_SCLP_H
#include <hw/sysbus.h>
#include <hw/qdev.h>
/* SCLP command codes */
#define SCLP_CMDW_READ_SCP_INFO 0x00020001
#define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001
#define SCLP_CMD_READ_EVENT_DATA 0x00770005
#define SCLP_CMD_WRITE_EVENT_DATA 0x00760005
#define SCLP_CMD_READ_EVENT_DATA 0x00770005
#define SCLP_CMD_WRITE_EVENT_DATA 0x00760005
#define SCLP_CMD_WRITE_EVENT_MASK 0x00780005
/* SCLP response codes */
#define SCLP_RC_NORMAL_READ_COMPLETION 0x0010
#define SCLP_RC_NORMAL_COMPLETION 0x0020
#define SCLP_RC_INVALID_SCLP_COMMAND 0x01f0
#define SCLP_RC_CONTAINED_EQUIPMENT_CHECK 0x0340
#define SCLP_RC_INSUFFICIENT_SCCB_LENGTH 0x0300
#define SCLP_RC_INVALID_FUNCTION 0x40f0
#define SCLP_RC_NO_EVENT_BUFFERS_STORED 0x60f0
#define SCLP_RC_INVALID_SELECTION_MASK 0x70f0
#define SCLP_RC_INCONSISTENT_LENGTHS 0x72f0
#define SCLP_RC_EVENT_BUFFER_SYNTAX_ERROR 0x73f0
#define SCLP_RC_INVALID_MASK_LENGTH 0x74f0
/* Service Call Control Block (SCCB) and its elements */
#define SCCB_SIZE 4096
#define SCLP_VARIABLE_LENGTH_RESPONSE 0x80
#define SCLP_EVENT_BUFFER_ACCEPTED 0x80
#define SCLP_FC_NORMAL_WRITE 0
/*
* Normally packed structures are not the right thing to do, since all code
* must take care of endianness. We cannot use ldl_phys and friends for two
* reasons, though:
* - some of the embedded structures below the SCCB can appear multiple times
* at different locations, so there is no fixed offset
* - we work on a private copy of the SCCB, since there are several length
* fields, that would cause a security nightmare if we allow the guest to
* alter the structure while we parse it. We cannot use ldl_p and friends
* either without doing pointer arithmetics
* So we have to double check that all users of sclp data structures use the
* right endianness wrappers.
*/
typedef struct SCCBHeader {
uint16_t length;
uint8_t function_code;
uint8_t control_mask[3];
uint16_t response_code;
} QEMU_PACKED SCCBHeader;
#define SCCB_DATA_LEN (SCCB_SIZE - sizeof(SCCBHeader))
typedef struct ReadInfo {
SCCBHeader h;
uint16_t rnmax;
uint8_t rnsize;
} QEMU_PACKED ReadInfo;
typedef struct SCCB {
SCCBHeader h;
char data[SCCB_DATA_LEN];
} QEMU_PACKED SCCB;
static inline int sccb_data_len(SCCB *sccb)
{
return be16_to_cpu(sccb->h.length) - sizeof(sccb->h);
}
#define TYPE_DEVICE_S390_SCLP "s390-sclp-device"
#define SCLP_S390_DEVICE(obj) \
OBJECT_CHECK(S390SCLPDevice, (obj), TYPE_DEVICE_S390_SCLP)
#define SCLP_S390_DEVICE_CLASS(klass) \
OBJECT_CLASS_CHECK(S390SCLPDeviceClass, (klass), \
TYPE_DEVICE_S390_SCLP)
#define SCLP_S390_DEVICE_GET_CLASS(obj) \
OBJECT_GET_CLASS(S390SCLPDeviceClass, (obj), \
TYPE_DEVICE_S390_SCLP)
typedef struct SCLPEventFacility SCLPEventFacility;
typedef struct S390SCLPDevice {
SysBusDevice busdev;
SCLPEventFacility *ef;
void (*sclp_command_handler)(SCLPEventFacility *ef, SCCB *sccb,
uint64_t code);
bool (*event_pending)(SCLPEventFacility *ef);
} S390SCLPDevice;
typedef struct S390SCLPDeviceClass {
DeviceClass qdev;
int (*init)(S390SCLPDevice *sdev);
} S390SCLPDeviceClass;
void s390_sclp_init(void);
void sclp_service_interrupt(uint32_t sccb);
#endif
|
