1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Copyright IBM Corp. 2006, 2012
10 * Adjunct processor bus header file.
16 #include <linux/device.h>
17 #include <linux/types.h>
21 #define AP_DEVICES 256 /* Number of AP devices. */
22 #define AP_DOMAINS 256 /* Number of AP domains. */
23 #define AP_IOCTLS 256 /* Number of ioctls. */
24 #define AP_RESET_TIMEOUT (HZ*0.7) /* Time in ticks for reset timeouts. */
25 #define AP_CONFIG_TIME 30 /* Time in seconds between AP bus rescans. */
26 #define AP_POLL_TIME 1 /* Time in ticks between receive polls. */
28 extern int ap_domain_index;
30 extern spinlock_t ap_list_lock;
31 extern struct list_head ap_card_list;
33 static inline int ap_test_bit(unsigned int *ptr, unsigned int nr)
35 return (*ptr & (0x80000000u >> nr)) != 0;
38 #define AP_RESPONSE_NORMAL 0x00
39 #define AP_RESPONSE_Q_NOT_AVAIL 0x01
40 #define AP_RESPONSE_RESET_IN_PROGRESS 0x02
41 #define AP_RESPONSE_DECONFIGURED 0x03
42 #define AP_RESPONSE_CHECKSTOPPED 0x04
43 #define AP_RESPONSE_BUSY 0x05
44 #define AP_RESPONSE_INVALID_ADDRESS 0x06
45 #define AP_RESPONSE_OTHERWISE_CHANGED 0x07
46 #define AP_RESPONSE_Q_FULL 0x10
47 #define AP_RESPONSE_NO_PENDING_REPLY 0x10
48 #define AP_RESPONSE_INDEX_TOO_BIG 0x11
49 #define AP_RESPONSE_NO_FIRST_PART 0x13
50 #define AP_RESPONSE_MESSAGE_TOO_BIG 0x15
51 #define AP_RESPONSE_REQ_FAC_NOT_INST 0x16
56 #define AP_DEVICE_TYPE_PCICC 3
57 #define AP_DEVICE_TYPE_PCICA 4
58 #define AP_DEVICE_TYPE_PCIXCC 5
59 #define AP_DEVICE_TYPE_CEX2A 6
60 #define AP_DEVICE_TYPE_CEX2C 7
61 #define AP_DEVICE_TYPE_CEX3A 8
62 #define AP_DEVICE_TYPE_CEX3C 9
63 #define AP_DEVICE_TYPE_CEX4 10
64 #define AP_DEVICE_TYPE_CEX5 11
65 #define AP_DEVICE_TYPE_CEX6 12
68 * Known function facilities
70 #define AP_FUNC_MEX4K 1
71 #define AP_FUNC_CRT4K 2
72 #define AP_FUNC_COPRO 3
73 #define AP_FUNC_ACCEL 4
74 #define AP_FUNC_EP11 5
75 #define AP_FUNC_APXA 6
80 #define AP_INTR_DISABLED 0 /* AP interrupt disabled */
81 #define AP_INTR_ENABLED 1 /* AP interrupt enabled */
93 AP_STATE_SUSPEND_WAIT,
94 AP_STATE_UNBOUND, /* momentary not bound to a driver */
95 AP_STATE_BORKED, /* broken */
112 AP_WAIT_AGAIN, /* retry immediately */
113 AP_WAIT_TIMEOUT, /* wait for timeout */
114 AP_WAIT_INTERRUPT, /* wait for thin interrupt (if available) */
115 AP_WAIT_NONE, /* no wait */
123 * The ap driver struct includes a flags field which holds some info for
124 * the ap bus about the driver. Currently only one flag is supported and
125 * used: The DEFAULT flag marks an ap driver as a default driver which is
126 * used together with the apmask and aqmask whitelisting of the ap bus.
128 #define AP_DRIVER_FLAG_DEFAULT 0x0001
131 struct device_driver driver;
132 struct ap_device_id *ids;
135 int (*probe)(struct ap_device *);
136 void (*remove)(struct ap_device *);
137 void (*suspend)(struct ap_device *);
138 void (*resume)(struct ap_device *);
141 #define to_ap_drv(x) container_of((x), struct ap_driver, driver)
143 int ap_driver_register(struct ap_driver *, struct module *, char *);
144 void ap_driver_unregister(struct ap_driver *);
147 struct device device;
148 struct ap_driver *drv; /* Pointer to AP device driver. */
149 int device_type; /* AP device type. */
152 #define to_ap_dev(x) container_of((x), struct ap_device, device)
155 struct ap_device ap_dev;
156 struct list_head list; /* Private list of AP cards. */
157 struct list_head queues; /* List of assoc. AP queues */
158 void *private; /* ap driver private pointer. */
159 int raw_hwtype; /* AP raw hardware type. */
160 unsigned int functions; /* AP device function bitfield. */
161 int queue_depth; /* AP queue depth.*/
162 int id; /* AP card number. */
163 atomic_t total_request_count; /* # requests ever for this AP device.*/
166 #define to_ap_card(x) container_of((x), struct ap_card, ap_dev.device)
169 struct ap_device ap_dev;
170 struct list_head list; /* Private list of AP queues. */
171 struct ap_card *card; /* Ptr to assoc. AP card. */
172 spinlock_t lock; /* Per device lock. */
173 void *private; /* ap driver private pointer. */
174 ap_qid_t qid; /* AP queue id. */
175 int interrupt; /* indicate if interrupts are enabled */
176 int queue_count; /* # messages currently on AP queue. */
177 enum ap_state state; /* State of the AP device. */
178 int pendingq_count; /* # requests on pendingq list. */
179 int requestq_count; /* # requests on requestq list. */
180 int total_request_count; /* # requests ever for this AP device.*/
181 int request_timeout; /* Request timeout in jiffies. */
182 struct timer_list timeout; /* Timer for request timeouts. */
183 struct list_head pendingq; /* List of message sent to AP queue. */
184 struct list_head requestq; /* List of message yet to be sent. */
185 struct ap_message *reply; /* Per device reply message. */
188 #define to_ap_queue(x) container_of((x), struct ap_queue, ap_dev.device)
190 typedef enum ap_wait (ap_func_t)(struct ap_queue *queue);
193 struct list_head list; /* Request queueing. */
194 unsigned long long psmid; /* Message id. */
195 void *message; /* Pointer to message buffer. */
196 size_t length; /* Message length. */
197 int rc; /* Return code for this message */
199 void *private; /* ap driver private pointer. */
200 unsigned int special:1; /* Used for special commands. */
201 /* receive is called from tasklet context */
202 void (*receive)(struct ap_queue *, struct ap_message *,
203 struct ap_message *);
207 * ap_init_message() - Initialize ap_message.
208 * Initialize a message before using. Otherwise this might result in
209 * unexpected behaviour.
211 static inline void ap_init_message(struct ap_message *ap_msg)
213 memset(ap_msg, 0, sizeof(*ap_msg));
217 * ap_release_message() - Release ap_message.
218 * Releases all memory used internal within the ap_message struct
219 * Currently this is the message and private field.
221 static inline void ap_release_message(struct ap_message *ap_msg)
223 kzfree(ap_msg->message);
224 kzfree(ap_msg->private);
227 #define for_each_ap_card(_ac) \
228 list_for_each_entry(_ac, &ap_card_list, list)
230 #define for_each_ap_queue(_aq, _ac) \
231 list_for_each_entry(_aq, &(_ac)->queues, list)
234 * Note: don't use ap_send/ap_recv after using ap_queue_message
235 * for the first time. Otherwise the ap message queue will get
238 int ap_send(ap_qid_t, unsigned long long, void *, size_t);
239 int ap_recv(ap_qid_t, unsigned long long *, void *, size_t);
241 enum ap_wait ap_sm_event(struct ap_queue *aq, enum ap_event event);
242 enum ap_wait ap_sm_event_loop(struct ap_queue *aq, enum ap_event event);
244 void ap_queue_message(struct ap_queue *aq, struct ap_message *ap_msg);
245 void ap_cancel_message(struct ap_queue *aq, struct ap_message *ap_msg);
246 void ap_flush_queue(struct ap_queue *aq);
248 void *ap_airq_ptr(void);
249 void ap_wait(enum ap_wait wait);
250 void ap_request_timeout(struct timer_list *t);
251 void ap_bus_force_rescan(void);
253 void ap_queue_init_reply(struct ap_queue *aq, struct ap_message *ap_msg);
254 struct ap_queue *ap_queue_create(ap_qid_t qid, int device_type);
255 void ap_queue_remove(struct ap_queue *aq);
256 void ap_queue_suspend(struct ap_device *ap_dev);
257 void ap_queue_resume(struct ap_device *ap_dev);
258 void ap_queue_reinit_state(struct ap_queue *aq);
260 struct ap_card *ap_card_create(int id, int queue_depth, int raw_device_type,
261 int comp_device_type, unsigned int functions);
264 unsigned long ioctlm[BITS_TO_LONGS(AP_IOCTLS)];
265 unsigned long apm[BITS_TO_LONGS(AP_DEVICES)];
266 unsigned long aqm[BITS_TO_LONGS(AP_DOMAINS)];
268 extern struct ap_perms ap_perms;
269 extern struct mutex ap_perms_mutex;
272 * check APQN for owned/reserved by ap bus and default driver(s).
273 * Checks if this APQN is or will be in use by the ap bus
274 * and the default set of drivers.
275 * If yes, returns 1, if not returns 0. On error a negative
276 * errno value is returned.
278 int ap_owned_by_def_drv(int card, int queue);
281 * check 'matrix' of APQNs for owned/reserved by ap bus and
283 * Checks if there is at least one APQN in the given 'matrix'
284 * marked as owned/reserved by the ap bus and default driver(s).
285 * If such an APQN is found the return value is 1, otherwise
286 * 0 is returned. On error a negative errno value is returned.
287 * The parameter apm is a bitmask which should be declared
288 * as DECLARE_BITMAP(apm, AP_DEVICES), the aqm parameter is
289 * similar, should be declared as DECLARE_BITMAP(aqm, AP_DOMAINS).
291 int ap_apqn_in_matrix_owned_by_def_drv(unsigned long *apm,
295 * ap_parse_mask_str() - helper function to parse a bitmap string
296 * and clear/set the bits in the bitmap accordingly. The string may be
297 * given as absolute value, a hex string like 0x1F2E3D4C5B6A" simple
298 * overwriting the current content of the bitmap. Or as relative string
299 * like "+1-16,-32,-0x40,+128" where only single bits or ranges of
300 * bits are cleared or set. Distinction is done based on the very
301 * first character which may be '+' or '-' for the relative string
302 * and othewise assume to be an absolute value string. If parsing fails
303 * a negative errno value is returned. All arguments and bitmaps are
306 int ap_parse_mask_str(const char *str,
307 unsigned long *bitmap, int bits,
310 #endif /* _AP_BUS_H_ */