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-rw-r--r--drivers/s390/crypto/ap_bus.h158
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diff --git a/drivers/s390/crypto/ap_bus.h b/drivers/s390/crypto/ap_bus.h
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1/*
2 * linux/drivers/s390/crypto/ap_bus.h
3 *
4 * Copyright (C) 2006 IBM Corporation
5 * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
6 * Martin Schwidefsky <schwidefsky@de.ibm.com>
7 * Ralph Wuerthner <rwuerthn@de.ibm.com>
8 *
9 * Adjunct processor bus header file.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2, or (at your option)
14 * any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 */
25
26#ifndef _AP_BUS_H_
27#define _AP_BUS_H_
28
29#include <linux/device.h>
30#include <linux/mod_devicetable.h>
31#include <linux/types.h>
32
33#define AP_DEVICES 64 /* Number of AP devices. */
34#define AP_DOMAINS 16 /* Number of AP domains. */
35#define AP_MAX_RESET 90 /* Maximum number of resets. */
36#define AP_CONFIG_TIME 30 /* Time in seconds between AP bus rescans. */
37#define AP_POLL_TIME 1 /* Time in ticks between receive polls. */
38
39extern int ap_domain_index;
40
41/**
42 * The ap_qid_t identifier of an ap queue. It contains a
43 * 6 bit device index and a 4 bit queue index (domain).
44 */
45typedef unsigned int ap_qid_t;
46
47#define AP_MKQID(_device,_queue) (((_device) & 63) << 8 | ((_queue) & 15))
48#define AP_QID_DEVICE(_qid) (((_qid) >> 8) & 63)
49#define AP_QID_QUEUE(_qid) ((_qid) & 15)
50
51/**
52 * The ap queue status word is returned by all three AP functions
53 * (PQAP, NQAP and DQAP). There's a set of flags in the first
54 * byte, followed by a 1 byte response code.
55 */
56struct ap_queue_status {
57 unsigned int queue_empty : 1;
58 unsigned int replies_waiting : 1;
59 unsigned int queue_full : 1;
60 unsigned int pad1 : 5;
61 unsigned int response_code : 8;
62 unsigned int pad2 : 16;
63};
64
65#define AP_RESPONSE_NORMAL 0x00
66#define AP_RESPONSE_Q_NOT_AVAIL 0x01
67#define AP_RESPONSE_RESET_IN_PROGRESS 0x02
68#define AP_RESPONSE_DECONFIGURED 0x03
69#define AP_RESPONSE_CHECKSTOPPED 0x04
70#define AP_RESPONSE_BUSY 0x05
71#define AP_RESPONSE_Q_FULL 0x10
72#define AP_RESPONSE_NO_PENDING_REPLY 0x10
73#define AP_RESPONSE_INDEX_TOO_BIG 0x11
74#define AP_RESPONSE_NO_FIRST_PART 0x13
75#define AP_RESPONSE_MESSAGE_TOO_BIG 0x15
76
77/**
78 * Known device types
79 */
80#define AP_DEVICE_TYPE_PCICC 3
81#define AP_DEVICE_TYPE_PCICA 4
82#define AP_DEVICE_TYPE_PCIXCC 5
83#define AP_DEVICE_TYPE_CEX2A 6
84#define AP_DEVICE_TYPE_CEX2C 7
85
86struct ap_device;
87struct ap_message;
88
89struct ap_driver {
90 struct device_driver driver;
91 struct ap_device_id *ids;
92
93 int (*probe)(struct ap_device *);
94 void (*remove)(struct ap_device *);
95 /* receive is called from tasklet context */
96 void (*receive)(struct ap_device *, struct ap_message *,
97 struct ap_message *);
98};
99
100#define to_ap_drv(x) container_of((x), struct ap_driver, driver)
101
102int ap_driver_register(struct ap_driver *, struct module *, char *);
103void ap_driver_unregister(struct ap_driver *);
104
105struct ap_device {
106 struct device device;
107 struct ap_driver *drv; /* Pointer to AP device driver. */
108 spinlock_t lock; /* Per device lock. */
109
110 ap_qid_t qid; /* AP queue id. */
111 int queue_depth; /* AP queue depth.*/
112 int device_type; /* AP device type. */
113 int unregistered; /* marks AP device as unregistered */
114
115 int queue_count; /* # messages currently on AP queue. */
116
117 struct list_head pendingq; /* List of message sent to AP queue. */
118 int pendingq_count; /* # requests on pendingq list. */
119 struct list_head requestq; /* List of message yet to be sent. */
120 int requestq_count; /* # requests on requestq list. */
121 int total_request_count; /* # requests ever for this AP device. */
122
123 struct ap_message *reply; /* Per device reply message. */
124
125 void *private; /* ap driver private pointer. */
126};
127
128#define to_ap_dev(x) container_of((x), struct ap_device, device)
129
130struct ap_message {
131 struct list_head list; /* Request queueing. */
132 unsigned long long psmid; /* Message id. */
133 void *message; /* Pointer to message buffer. */
134 size_t length; /* Message length. */
135
136 void *private; /* ap driver private pointer. */
137};
138
139#define AP_DEVICE(dt) \
140 .dev_type=(dt), \
141 .match_flags=AP_DEVICE_ID_MATCH_DEVICE_TYPE,
142
143/**
144 * Note: don't use ap_send/ap_recv after using ap_queue_message
145 * for the first time. Otherwise the ap message queue will get
146 * confused.
147 */
148int ap_send(ap_qid_t, unsigned long long, void *, size_t);
149int ap_recv(ap_qid_t, unsigned long long *, void *, size_t);
150
151void ap_queue_message(struct ap_device *ap_dev, struct ap_message *ap_msg);
152void ap_cancel_message(struct ap_device *ap_dev, struct ap_message *ap_msg);
153void ap_flush_queue(struct ap_device *ap_dev);
154
155int ap_module_init(void);
156void ap_module_exit(void);
157
158#endif /* _AP_BUS_H_ */
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