blob: 0f3e6f38db552aeee3817d0374cb2f77ceb1568a (
plain)
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
|
/*
* Adjunct processor (AP) interfaces
*
* Copyright IBM Corp. 2017
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (version 2 only)
* as published by the Free Software Foundation.
*
* Author(s): Tony Krowiak <akrowia@linux.vnet.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
* Harald Freudenberger <freude@de.ibm.com>
*/
#ifndef _ASM_S390_AP_H_
#define _ASM_S390_AP_H_
/**
* The ap_qid_t identifier of an ap queue.
* If the AP facilities test (APFT) facility is available,
* card and queue index are 8 bit values, otherwise
* card index is 6 bit and queue index a 4 bit value.
*/
typedef unsigned int ap_qid_t;
#define AP_MKQID(_card, _queue) (((_card) & 63) << 8 | ((_queue) & 255))
#define AP_QID_CARD(_qid) (((_qid) >> 8) & 63)
#define AP_QID_QUEUE(_qid) ((_qid) & 255)
/**
* struct ap_queue_status - Holds the AP queue status.
* @queue_empty: Shows if queue is empty
* @replies_waiting: Waiting replies
* @queue_full: Is 1 if the queue is full
* @irq_enabled: Shows if interrupts are enabled for the AP
* @response_code: Holds the 8 bit response code
*
* The ap queue status word is returned by all three AP functions
* (PQAP, NQAP and DQAP). There's a set of flags in the first
* byte, followed by a 1 byte response code.
*/
struct ap_queue_status {
unsigned int queue_empty : 1;
unsigned int replies_waiting : 1;
unsigned int queue_full : 1;
unsigned int _pad1 : 4;
unsigned int irq_enabled : 1;
unsigned int response_code : 8;
unsigned int _pad2 : 16;
};
/**
* ap_test_queue(): Test adjunct processor queue.
* @qid: The AP queue number
* @tbit: Test facilities bit
* @info: Pointer to queue descriptor
*
* Returns AP queue status structure.
*/
struct ap_queue_status ap_test_queue(ap_qid_t qid,
int tbit,
unsigned long *info);
#endif /* _ASM_S390_AP_H_ */
|
