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1/* SPDX-License-Identifier: GPL-2.0+ */
2/*
3 * Copyright IBM Corp. 2006, 2023
4 * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
5 * Martin Schwidefsky <schwidefsky@de.ibm.com>
6 * Ralph Wuerthner <rwuerthn@de.ibm.com>
7 * Felix Beck <felix.beck@de.ibm.com>
8 * Holger Dengler <hd@linux.vnet.ibm.com>
9 *
10 * Adjunct processor bus header file.
11 */
12
13#ifndef _AP_BUS_H_
14#define _AP_BUS_H_
15
16#include <linux/device.h>
17#include <linux/types.h>
18#include <linux/hashtable.h>
19#include <asm/isc.h>
20#include <asm/ap.h>
21
22#define AP_DEVICES 256 /* Number of AP devices. */
23#define AP_DOMAINS 256 /* Number of AP domains. */
24#define AP_IOCTLS 256 /* Number of ioctls. */
25#define AP_RESET_TIMEOUT (HZ*0.7) /* Time in ticks for reset timeouts. */
26#define AP_CONFIG_TIME 30 /* Time in seconds between AP bus rescans. */
27#define AP_POLL_TIME 1 /* Time in ticks between receive polls. */
28#define AP_DEFAULT_MAX_MSG_SIZE (12 * 1024)
29#define AP_TAPQ_ML_FIELD_CHUNK_SIZE (4096)
30
31extern int ap_domain_index;
32extern atomic_t ap_max_msg_size;
33
34extern DECLARE_HASHTABLE(ap_queues, 8);
35extern spinlock_t ap_queues_lock;
36
37static inline int ap_test_bit(unsigned int *ptr, unsigned int nr)
38{
39 return (*ptr & (0x80000000u >> nr)) != 0;
40}
41
42#define AP_RESPONSE_NORMAL 0x00
43#define AP_RESPONSE_Q_NOT_AVAIL 0x01
44#define AP_RESPONSE_RESET_IN_PROGRESS 0x02
45#define AP_RESPONSE_DECONFIGURED 0x03
46#define AP_RESPONSE_CHECKSTOPPED 0x04
47#define AP_RESPONSE_BUSY 0x05
48#define AP_RESPONSE_INVALID_ADDRESS 0x06
49#define AP_RESPONSE_OTHERWISE_CHANGED 0x07
50#define AP_RESPONSE_INVALID_GISA 0x08
51#define AP_RESPONSE_Q_BOUND_TO_ANOTHER 0x09
52#define AP_RESPONSE_STATE_CHANGE_IN_PROGRESS 0x0A
53#define AP_RESPONSE_Q_NOT_BOUND 0x0B
54#define AP_RESPONSE_Q_FULL 0x10
55#define AP_RESPONSE_NO_PENDING_REPLY 0x10
56#define AP_RESPONSE_INDEX_TOO_BIG 0x11
57#define AP_RESPONSE_NO_FIRST_PART 0x13
58#define AP_RESPONSE_MESSAGE_TOO_BIG 0x15
59#define AP_RESPONSE_REQ_FAC_NOT_INST 0x16
60#define AP_RESPONSE_Q_BIND_ERROR 0x30
61#define AP_RESPONSE_Q_NOT_AVAIL_FOR_ASSOC 0x31
62#define AP_RESPONSE_Q_NOT_EMPTY 0x32
63#define AP_RESPONSE_BIND_LIMIT_EXCEEDED 0x33
64#define AP_RESPONSE_INVALID_ASSOC_SECRET 0x34
65#define AP_RESPONSE_ASSOC_SECRET_NOT_UNIQUE 0x35
66#define AP_RESPONSE_ASSOC_FAILED 0x36
67#define AP_RESPONSE_INVALID_DOMAIN 0x42
68
69/*
70 * Supported AP device types
71 */
72#define AP_DEVICE_TYPE_CEX4 10
73#define AP_DEVICE_TYPE_CEX5 11
74#define AP_DEVICE_TYPE_CEX6 12
75#define AP_DEVICE_TYPE_CEX7 13
76#define AP_DEVICE_TYPE_CEX8 14
77
78/*
79 * AP queue state machine states
80 */
81enum ap_sm_state {
82 AP_SM_STATE_RESET_START = 0,
83 AP_SM_STATE_RESET_WAIT,
84 AP_SM_STATE_SETIRQ_WAIT,
85 AP_SM_STATE_IDLE,
86 AP_SM_STATE_WORKING,
87 AP_SM_STATE_QUEUE_FULL,
88 AP_SM_STATE_ASSOC_WAIT,
89 NR_AP_SM_STATES
90};
91
92/*
93 * AP queue state machine events
94 */
95enum ap_sm_event {
96 AP_SM_EVENT_POLL,
97 AP_SM_EVENT_TIMEOUT,
98 NR_AP_SM_EVENTS
99};
100
101/*
102 * AP queue state wait behaviour
103 */
104enum ap_sm_wait {
105 AP_SM_WAIT_AGAIN = 0, /* retry immediately */
106 AP_SM_WAIT_HIGH_TIMEOUT, /* poll high freq, wait for timeout */
107 AP_SM_WAIT_LOW_TIMEOUT, /* poll low freq, wait for timeout */
108 AP_SM_WAIT_INTERRUPT, /* wait for thin interrupt (if available) */
109 AP_SM_WAIT_NONE, /* no wait */
110 NR_AP_SM_WAIT
111};
112
113/*
114 * AP queue device states
115 */
116enum ap_dev_state {
117 AP_DEV_STATE_UNINITIATED = 0, /* fresh and virgin, not touched */
118 AP_DEV_STATE_OPERATING, /* queue dev is working normal */
119 AP_DEV_STATE_SHUTDOWN, /* remove/unbind/shutdown in progress */
120 AP_DEV_STATE_ERROR, /* device is in error state */
121 NR_AP_DEV_STATES
122};
123
124struct ap_device;
125struct ap_message;
126
127/*
128 * The ap driver struct includes a flags field which holds some info for
129 * the ap bus about the driver. Currently only one flag is supported and
130 * used: The DEFAULT flag marks an ap driver as a default driver which is
131 * used together with the apmask and aqmask whitelisting of the ap bus.
132 */
133#define AP_DRIVER_FLAG_DEFAULT 0x0001
134
135struct ap_driver {
136 struct device_driver driver;
137 struct ap_device_id *ids;
138 unsigned int flags;
139
140 int (*probe)(struct ap_device *);
141 void (*remove)(struct ap_device *);
142 int (*in_use)(unsigned long *apm, unsigned long *aqm);
143 /*
144 * Called at the start of the ap bus scan function when
145 * the crypto config information (qci) has changed.
146 * This callback is not invoked if there is no AP
147 * QCI support available.
148 */
149 void (*on_config_changed)(struct ap_config_info *new_config_info,
150 struct ap_config_info *old_config_info);
151 /*
152 * Called at the end of the ap bus scan function when
153 * the crypto config information (qci) has changed.
154 * This callback is not invoked if there is no AP
155 * QCI support available.
156 */
157 void (*on_scan_complete)(struct ap_config_info *new_config_info,
158 struct ap_config_info *old_config_info);
159};
160
161#define to_ap_drv(x) container_of((x), struct ap_driver, driver)
162
163int ap_driver_register(struct ap_driver *, struct module *, char *);
164void ap_driver_unregister(struct ap_driver *);
165
166struct ap_device {
167 struct device device;
168 int device_type; /* AP device type. */
169};
170
171#define to_ap_dev(x) container_of((x), struct ap_device, device)
172
173struct ap_card {
174 struct ap_device ap_dev;
175 struct ap_tapq_hwinfo hwinfo; /* TAPQ GR2 content */
176 int id; /* AP card number. */
177 unsigned int maxmsgsize; /* AP msg limit for this card */
178 bool config; /* configured state */
179 bool chkstop; /* checkstop state */
180 atomic64_t total_request_count; /* # requests ever for this AP device.*/
181};
182
183#define TAPQ_CARD_HWINFO_MASK 0xFEFF0000FFFF0F0FUL
184#define ASSOC_IDX_INVALID 0x10000
185
186#define to_ap_card(x) container_of((x), struct ap_card, ap_dev.device)
187
188struct ap_queue {
189 struct ap_device ap_dev;
190 struct hlist_node hnode; /* Node for the ap_queues hashtable */
191 struct ap_card *card; /* Ptr to assoc. AP card. */
192 spinlock_t lock; /* Per device lock. */
193 enum ap_dev_state dev_state; /* queue device state */
194 bool config; /* configured state */
195 bool chkstop; /* checkstop state */
196 ap_qid_t qid; /* AP queue id. */
197 unsigned int se_bstate; /* SE bind state (BS) */
198 unsigned int assoc_idx; /* SE association index */
199 int queue_count; /* # messages currently on AP queue. */
200 int pendingq_count; /* # requests on pendingq list. */
201 int requestq_count; /* # requests on requestq list. */
202 u64 total_request_count; /* # requests ever for this AP device.*/
203 int request_timeout; /* Request timeout in jiffies. */
204 struct timer_list timeout; /* Timer for request timeouts. */
205 struct list_head pendingq; /* List of message sent to AP queue. */
206 struct list_head requestq; /* List of message yet to be sent. */
207 struct ap_message *reply; /* Per device reply message. */
208 enum ap_sm_state sm_state; /* ap queue state machine state */
209 int rapq_fbit; /* fbit arg for next rapq invocation */
210 int last_err_rc; /* last error state response code */
211};
212
213#define to_ap_queue(x) container_of((x), struct ap_queue, ap_dev.device)
214
215typedef enum ap_sm_wait (ap_func_t)(struct ap_queue *queue);
216
217struct ap_message {
218 struct list_head list; /* Request queueing. */
219 unsigned long psmid; /* Message id. */
220 void *msg; /* Pointer to message buffer. */
221 size_t len; /* actual msg len in msg buffer */
222 size_t bufsize; /* allocated msg buffer size */
223 u16 flags; /* Flags, see AP_MSG_FLAG_xxx */
224 int rc; /* Return code for this message */
225 void *private; /* ap driver private pointer. */
226 /* receive is called from tasklet context */
227 void (*receive)(struct ap_queue *, struct ap_message *,
228 struct ap_message *);
229};
230
231#define AP_MSG_FLAG_SPECIAL 0x0001 /* flag msg as 'special' with NQAP */
232#define AP_MSG_FLAG_USAGE 0x0002 /* CCA, EP11: usage (no admin) msg */
233#define AP_MSG_FLAG_ADMIN 0x0004 /* CCA, EP11: admin (=control) msg */
234
235/**
236 * ap_init_message() - Initialize ap_message.
237 * Initialize a message before using. Otherwise this might result in
238 * unexpected behaviour.
239 */
240static inline void ap_init_message(struct ap_message *ap_msg)
241{
242 memset(ap_msg, 0, sizeof(*ap_msg));
243}
244
245/**
246 * ap_release_message() - Release ap_message.
247 * Releases all memory used internal within the ap_message struct
248 * Currently this is the message and private field.
249 */
250static inline void ap_release_message(struct ap_message *ap_msg)
251{
252 kfree_sensitive(ap_msg->msg);
253 kfree_sensitive(ap_msg->private);
254}
255
256enum ap_sm_wait ap_sm_event(struct ap_queue *aq, enum ap_sm_event event);
257enum ap_sm_wait ap_sm_event_loop(struct ap_queue *aq, enum ap_sm_event event);
258
259int ap_queue_message(struct ap_queue *aq, struct ap_message *ap_msg);
260void ap_cancel_message(struct ap_queue *aq, struct ap_message *ap_msg);
261void ap_flush_queue(struct ap_queue *aq);
262bool ap_queue_usable(struct ap_queue *aq);
263
264void *ap_airq_ptr(void);
265int ap_sb_available(void);
266bool ap_is_se_guest(void);
267void ap_wait(enum ap_sm_wait wait);
268void ap_request_timeout(struct timer_list *t);
269void ap_bus_force_rescan(void);
270
271int ap_test_config_usage_domain(unsigned int domain);
272int ap_test_config_ctrl_domain(unsigned int domain);
273
274void ap_queue_init_reply(struct ap_queue *aq, struct ap_message *ap_msg);
275struct ap_queue *ap_queue_create(ap_qid_t qid, int device_type);
276void ap_queue_prepare_remove(struct ap_queue *aq);
277void ap_queue_remove(struct ap_queue *aq);
278void ap_queue_init_state(struct ap_queue *aq);
279void _ap_queue_init_state(struct ap_queue *aq);
280
281struct ap_card *ap_card_create(int id, struct ap_tapq_hwinfo info,
282 int comp_type);
283
284#define APMASKSIZE (BITS_TO_LONGS(AP_DEVICES) * sizeof(unsigned long))
285#define AQMASKSIZE (BITS_TO_LONGS(AP_DOMAINS) * sizeof(unsigned long))
286
287struct ap_perms {
288 unsigned long ioctlm[BITS_TO_LONGS(AP_IOCTLS)];
289 unsigned long apm[BITS_TO_LONGS(AP_DEVICES)];
290 unsigned long aqm[BITS_TO_LONGS(AP_DOMAINS)];
291 unsigned long adm[BITS_TO_LONGS(AP_DOMAINS)];
292};
293
294extern struct ap_perms ap_perms;
295extern struct mutex ap_perms_mutex;
296
297/*
298 * Get ap_queue device for this qid.
299 * Returns ptr to the struct ap_queue device or NULL if there
300 * was no ap_queue device with this qid found. When something is
301 * found, the reference count of the embedded device is increased.
302 * So the caller has to decrease the reference count after use
303 * with a call to put_device(&aq->ap_dev.device).
304 */
305struct ap_queue *ap_get_qdev(ap_qid_t qid);
306
307/*
308 * check APQN for owned/reserved by ap bus and default driver(s).
309 * Checks if this APQN is or will be in use by the ap bus
310 * and the default set of drivers.
311 * If yes, returns 1, if not returns 0. On error a negative
312 * errno value is returned.
313 */
314int ap_owned_by_def_drv(int card, int queue);
315
316/*
317 * check 'matrix' of APQNs for owned/reserved by ap bus and
318 * default driver(s).
319 * Checks if there is at least one APQN in the given 'matrix'
320 * marked as owned/reserved by the ap bus and default driver(s).
321 * If such an APQN is found the return value is 1, otherwise
322 * 0 is returned. On error a negative errno value is returned.
323 * The parameter apm is a bitmask which should be declared
324 * as DECLARE_BITMAP(apm, AP_DEVICES), the aqm parameter is
325 * similar, should be declared as DECLARE_BITMAP(aqm, AP_DOMAINS).
326 */
327int ap_apqn_in_matrix_owned_by_def_drv(unsigned long *apm,
328 unsigned long *aqm);
329
330/*
331 * ap_parse_mask_str() - helper function to parse a bitmap string
332 * and clear/set the bits in the bitmap accordingly. The string may be
333 * given as absolute value, a hex string like 0x1F2E3D4C5B6A" simple
334 * overwriting the current content of the bitmap. Or as relative string
335 * like "+1-16,-32,-0x40,+128" where only single bits or ranges of
336 * bits are cleared or set. Distinction is done based on the very
337 * first character which may be '+' or '-' for the relative string
338 * and otherwise assume to be an absolute value string. If parsing fails
339 * a negative errno value is returned. All arguments and bitmaps are
340 * big endian order.
341 */
342int ap_parse_mask_str(const char *str,
343 unsigned long *bitmap, int bits,
344 struct mutex *lock);
345
346/*
347 * Interface to wait for the AP bus to have done one initial ap bus
348 * scan and all detected APQNs have been bound to device drivers.
349 * If these both conditions are not fulfilled, this function blocks
350 * on a condition with wait_for_completion_killable_timeout().
351 * If these both conditions are fulfilled (before the timeout hits)
352 * the return value is 0. If the timeout (in jiffies) hits instead
353 * -ETIME is returned. On failures negative return values are
354 * returned to the caller.
355 */
356int ap_wait_init_apqn_bindings_complete(unsigned long timeout);
357
358void ap_send_config_uevent(struct ap_device *ap_dev, bool cfg);
359void ap_send_online_uevent(struct ap_device *ap_dev, int online);
360
361#endif /* _AP_BUS_H_ */
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 * Felix Beck <felix.beck@de.ibm.com>
9 * Holger Dengler <hd@linux.vnet.ibm.com>
10 *
11 * Adjunct processor bus header file.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2, or (at your option)
16 * any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 */
27
28#ifndef _AP_BUS_H_
29#define _AP_BUS_H_
30
31#include <linux/device.h>
32#include <linux/mod_devicetable.h>
33#include <linux/types.h>
34
35#define AP_DEVICES 64 /* Number of AP devices. */
36#define AP_DOMAINS 16 /* Number of AP domains. */
37#define AP_MAX_RESET 90 /* Maximum number of resets. */
38#define AP_RESET_TIMEOUT (HZ/2) /* Time in ticks for reset timeouts. */
39#define AP_CONFIG_TIME 30 /* Time in seconds between AP bus rescans. */
40#define AP_POLL_TIME 1 /* Time in ticks between receive polls. */
41
42extern int ap_domain_index;
43
44/**
45 * The ap_qid_t identifier of an ap queue. It contains a
46 * 6 bit device index and a 4 bit queue index (domain).
47 */
48typedef unsigned int ap_qid_t;
49
50#define AP_MKQID(_device,_queue) (((_device) & 63) << 8 | ((_queue) & 15))
51#define AP_QID_DEVICE(_qid) (((_qid) >> 8) & 63)
52#define AP_QID_QUEUE(_qid) ((_qid) & 15)
53
54/**
55 * structy ap_queue_status - Holds the AP queue status.
56 * @queue_empty: Shows if queue is empty
57 * @replies_waiting: Waiting replies
58 * @queue_full: Is 1 if the queue is full
59 * @pad: A 4 bit pad
60 * @int_enabled: Shows if interrupts are enabled for the AP
61 * @response_conde: Holds the 8 bit response code
62 * @pad2: A 16 bit pad
63 *
64 * The ap queue status word is returned by all three AP functions
65 * (PQAP, NQAP and DQAP). There's a set of flags in the first
66 * byte, followed by a 1 byte response code.
67 */
68struct ap_queue_status {
69 unsigned int queue_empty : 1;
70 unsigned int replies_waiting : 1;
71 unsigned int queue_full : 1;
72 unsigned int pad1 : 4;
73 unsigned int int_enabled : 1;
74 unsigned int response_code : 8;
75 unsigned int pad2 : 16;
76} __packed;
77
78#define AP_QUEUE_STATUS_INVALID \
79 { 1, 1, 1, 0xF, 1, 0xFF, 0xFFFF }
80
81static inline
82int ap_queue_status_invalid_test(struct ap_queue_status *status)
83{
84 struct ap_queue_status invalid = AP_QUEUE_STATUS_INVALID;
85 return !(memcmp(status, &invalid, sizeof(struct ap_queue_status)));
86}
87
88#define MAX_AP_FACILITY 31
89
90static inline int test_ap_facility(unsigned int function, unsigned int nr)
91{
92 if (nr > MAX_AP_FACILITY)
93 return 0;
94 return function & (unsigned int)(0x80000000 >> nr);
95}
96
97#define AP_RESPONSE_NORMAL 0x00
98#define AP_RESPONSE_Q_NOT_AVAIL 0x01
99#define AP_RESPONSE_RESET_IN_PROGRESS 0x02
100#define AP_RESPONSE_DECONFIGURED 0x03
101#define AP_RESPONSE_CHECKSTOPPED 0x04
102#define AP_RESPONSE_BUSY 0x05
103#define AP_RESPONSE_INVALID_ADDRESS 0x06
104#define AP_RESPONSE_OTHERWISE_CHANGED 0x07
105#define AP_RESPONSE_Q_FULL 0x10
106#define AP_RESPONSE_NO_PENDING_REPLY 0x10
107#define AP_RESPONSE_INDEX_TOO_BIG 0x11
108#define AP_RESPONSE_NO_FIRST_PART 0x13
109#define AP_RESPONSE_MESSAGE_TOO_BIG 0x15
110#define AP_RESPONSE_REQ_FAC_NOT_INST 0x16
111
112/*
113 * Known device types
114 */
115#define AP_DEVICE_TYPE_PCICC 3
116#define AP_DEVICE_TYPE_PCICA 4
117#define AP_DEVICE_TYPE_PCIXCC 5
118#define AP_DEVICE_TYPE_CEX2A 6
119#define AP_DEVICE_TYPE_CEX2C 7
120#define AP_DEVICE_TYPE_CEX3A 8
121#define AP_DEVICE_TYPE_CEX3C 9
122
123/*
124 * AP reset flag states
125 */
126#define AP_RESET_IGNORE 0 /* request timeout will be ignored */
127#define AP_RESET_ARMED 1 /* request timeout timer is active */
128#define AP_RESET_DO 2 /* AP reset required */
129
130struct ap_device;
131struct ap_message;
132
133struct ap_driver {
134 struct device_driver driver;
135 struct ap_device_id *ids;
136
137 int (*probe)(struct ap_device *);
138 void (*remove)(struct ap_device *);
139 /* receive is called from tasklet context */
140 void (*receive)(struct ap_device *, struct ap_message *,
141 struct ap_message *);
142 int request_timeout; /* request timeout in jiffies */
143};
144
145#define to_ap_drv(x) container_of((x), struct ap_driver, driver)
146
147int ap_driver_register(struct ap_driver *, struct module *, char *);
148void ap_driver_unregister(struct ap_driver *);
149
150struct ap_device {
151 struct device device;
152 struct ap_driver *drv; /* Pointer to AP device driver. */
153 spinlock_t lock; /* Per device lock. */
154 struct list_head list; /* private list of all AP devices. */
155
156 ap_qid_t qid; /* AP queue id. */
157 int queue_depth; /* AP queue depth.*/
158 int device_type; /* AP device type. */
159 int unregistered; /* marks AP device as unregistered */
160 struct timer_list timeout; /* Timer for request timeouts. */
161 int reset; /* Reset required after req. timeout. */
162
163 int queue_count; /* # messages currently on AP queue. */
164
165 struct list_head pendingq; /* List of message sent to AP queue. */
166 int pendingq_count; /* # requests on pendingq list. */
167 struct list_head requestq; /* List of message yet to be sent. */
168 int requestq_count; /* # requests on requestq list. */
169 int total_request_count; /* # requests ever for this AP device. */
170
171 struct ap_message *reply; /* Per device reply message. */
172
173 void *private; /* ap driver private pointer. */
174};
175
176#define to_ap_dev(x) container_of((x), struct ap_device, device)
177
178struct ap_message {
179 struct list_head list; /* Request queueing. */
180 unsigned long long psmid; /* Message id. */
181 void *message; /* Pointer to message buffer. */
182 size_t length; /* Message length. */
183
184 void *private; /* ap driver private pointer. */
185 unsigned int special:1; /* Used for special commands. */
186};
187
188#define AP_DEVICE(dt) \
189 .dev_type=(dt), \
190 .match_flags=AP_DEVICE_ID_MATCH_DEVICE_TYPE,
191
192/**
193 * ap_init_message() - Initialize ap_message.
194 * Initialize a message before using. Otherwise this might result in
195 * unexpected behaviour.
196 */
197static inline void ap_init_message(struct ap_message *ap_msg)
198{
199 ap_msg->psmid = 0;
200 ap_msg->length = 0;
201 ap_msg->special = 0;
202}
203
204/*
205 * Note: don't use ap_send/ap_recv after using ap_queue_message
206 * for the first time. Otherwise the ap message queue will get
207 * confused.
208 */
209int ap_send(ap_qid_t, unsigned long long, void *, size_t);
210int ap_recv(ap_qid_t, unsigned long long *, void *, size_t);
211
212void ap_queue_message(struct ap_device *ap_dev, struct ap_message *ap_msg);
213void ap_cancel_message(struct ap_device *ap_dev, struct ap_message *ap_msg);
214void ap_flush_queue(struct ap_device *ap_dev);
215
216int ap_module_init(void);
217void ap_module_exit(void);
218
219int ap_4096_commands_available(ap_qid_t qid);
220
221#endif /* _AP_BUS_H_ */