1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Copyright IBM Corp. 2006, 2019
10 * Adjunct processor bus header file.
16 #include <linux/device.h>
17 #include <linux/types.h>
18 #include <linux/hashtable.h>
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)
31 extern int ap_domain_index;
32 extern atomic_t ap_max_msg_size;
34 extern DECLARE_HASHTABLE(ap_queues, 8);
35 extern spinlock_t ap_queues_lock;
37 static inline int ap_test_bit(unsigned int *ptr, unsigned int nr)
39 return (*ptr & (0x80000000u >> nr)) != 0;
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
72 #define AP_DEVICE_TYPE_PCICC 3
73 #define AP_DEVICE_TYPE_PCICA 4
74 #define AP_DEVICE_TYPE_PCIXCC 5
75 #define AP_DEVICE_TYPE_CEX2A 6
76 #define AP_DEVICE_TYPE_CEX2C 7
77 #define AP_DEVICE_TYPE_CEX3A 8
78 #define AP_DEVICE_TYPE_CEX3C 9
79 #define AP_DEVICE_TYPE_CEX4 10
80 #define AP_DEVICE_TYPE_CEX5 11
81 #define AP_DEVICE_TYPE_CEX6 12
82 #define AP_DEVICE_TYPE_CEX7 13
83 #define AP_DEVICE_TYPE_CEX8 14
86 * Known function facilities
88 #define AP_FUNC_MEX4K 1
89 #define AP_FUNC_CRT4K 2
90 #define AP_FUNC_COPRO 3
91 #define AP_FUNC_ACCEL 4
92 #define AP_FUNC_EP11 5
93 #define AP_FUNC_APXA 6
96 * AP queue state machine states
99 AP_SM_STATE_RESET_START = 0,
100 AP_SM_STATE_RESET_WAIT,
101 AP_SM_STATE_SETIRQ_WAIT,
104 AP_SM_STATE_QUEUE_FULL,
105 AP_SM_STATE_ASSOC_WAIT,
110 * AP queue state machine events
119 * AP queue state wait behaviour
122 AP_SM_WAIT_AGAIN = 0, /* retry immediately */
123 AP_SM_WAIT_HIGH_TIMEOUT, /* poll high freq, wait for timeout */
124 AP_SM_WAIT_LOW_TIMEOUT, /* poll low freq, wait for timeout */
125 AP_SM_WAIT_INTERRUPT, /* wait for thin interrupt (if available) */
126 AP_SM_WAIT_NONE, /* no wait */
131 * AP queue device states
134 AP_DEV_STATE_UNINITIATED = 0, /* fresh and virgin, not touched */
135 AP_DEV_STATE_OPERATING, /* queue dev is working normal */
136 AP_DEV_STATE_SHUTDOWN, /* remove/unbind/shutdown in progress */
137 AP_DEV_STATE_ERROR, /* device is in error state */
145 * The ap driver struct includes a flags field which holds some info for
146 * the ap bus about the driver. Currently only one flag is supported and
147 * used: The DEFAULT flag marks an ap driver as a default driver which is
148 * used together with the apmask and aqmask whitelisting of the ap bus.
150 #define AP_DRIVER_FLAG_DEFAULT 0x0001
153 struct device_driver driver;
154 struct ap_device_id *ids;
157 int (*probe)(struct ap_device *);
158 void (*remove)(struct ap_device *);
159 int (*in_use)(unsigned long *apm, unsigned long *aqm);
161 * Called at the start of the ap bus scan function when
162 * the crypto config information (qci) has changed.
163 * This callback is not invoked if there is no AP
164 * QCI support available.
166 void (*on_config_changed)(struct ap_config_info *new_config_info,
167 struct ap_config_info *old_config_info);
169 * Called at the end of the ap bus scan function when
170 * the crypto config information (qci) has changed.
171 * This callback is not invoked if there is no AP
172 * QCI support available.
174 void (*on_scan_complete)(struct ap_config_info *new_config_info,
175 struct ap_config_info *old_config_info);
178 #define to_ap_drv(x) container_of((x), struct ap_driver, driver)
180 int ap_driver_register(struct ap_driver *, struct module *, char *);
181 void ap_driver_unregister(struct ap_driver *);
184 struct device device;
185 int device_type; /* AP device type. */
188 #define to_ap_dev(x) container_of((x), struct ap_device, device)
191 struct ap_device ap_dev;
192 int raw_hwtype; /* AP raw hardware type. */
193 unsigned int functions; /* TAPQ GR2 upper 32 facility bits */
194 int queue_depth; /* AP queue depth.*/
195 int id; /* AP card number. */
196 unsigned int maxmsgsize; /* AP msg limit for this card */
197 bool config; /* configured state */
198 bool chkstop; /* checkstop state */
199 atomic64_t total_request_count; /* # requests ever for this AP device.*/
202 #define TAPQ_CARD_FUNC_CMP_MASK 0xFFFF0000
203 #define ASSOC_IDX_INVALID 0x10000
205 #define to_ap_card(x) container_of((x), struct ap_card, ap_dev.device)
208 struct ap_device ap_dev;
209 struct hlist_node hnode; /* Node for the ap_queues hashtable */
210 struct ap_card *card; /* Ptr to assoc. AP card. */
211 spinlock_t lock; /* Per device lock. */
212 enum ap_dev_state dev_state; /* queue device state */
213 bool config; /* configured state */
214 bool chkstop; /* checkstop state */
215 ap_qid_t qid; /* AP queue id. */
216 bool interrupt; /* indicate if interrupts are enabled */
217 unsigned int assoc_idx; /* SE association index */
218 int queue_count; /* # messages currently on AP queue. */
219 int pendingq_count; /* # requests on pendingq list. */
220 int requestq_count; /* # requests on requestq list. */
221 u64 total_request_count; /* # requests ever for this AP device.*/
222 int request_timeout; /* Request timeout in jiffies. */
223 struct timer_list timeout; /* Timer for request timeouts. */
224 struct list_head pendingq; /* List of message sent to AP queue. */
225 struct list_head requestq; /* List of message yet to be sent. */
226 struct ap_message *reply; /* Per device reply message. */
227 enum ap_sm_state sm_state; /* ap queue state machine state */
228 int rapq_fbit; /* fbit arg for next rapq invocation */
229 int last_err_rc; /* last error state response code */
232 #define to_ap_queue(x) container_of((x), struct ap_queue, ap_dev.device)
234 typedef enum ap_sm_wait (ap_func_t)(struct ap_queue *queue);
236 /* failure injection cmd struct */
239 u16 cmd; /* fi flags + action */
241 u8 flags; /* fi flags only */
242 u8 action; /* fi action only */
247 /* all currently known fi actions */
249 AP_FI_ACTION_CCA_AGENT_FF = 0x01,
250 AP_FI_ACTION_CCA_DOM_INVAL = 0x02,
251 AP_FI_ACTION_NQAP_QID_INVAL = 0x03,
254 /* all currently known fi flags */
256 AP_FI_FLAG_NO_RETRY = 0x01,
257 AP_FI_FLAG_TOGGLE_SPECIAL = 0x02,
261 struct list_head list; /* Request queueing. */
262 unsigned long psmid; /* Message id. */
263 void *msg; /* Pointer to message buffer. */
264 size_t len; /* actual msg len in msg buffer */
265 size_t bufsize; /* allocated msg buffer size */
266 u16 flags; /* Flags, see AP_MSG_FLAG_xxx */
267 struct ap_fi fi; /* Failure Injection cmd */
268 int rc; /* Return code for this message */
269 void *private; /* ap driver private pointer. */
270 /* receive is called from tasklet context */
271 void (*receive)(struct ap_queue *, struct ap_message *,
272 struct ap_message *);
275 #define AP_MSG_FLAG_SPECIAL 0x0001 /* flag msg as 'special' with NQAP */
276 #define AP_MSG_FLAG_USAGE 0x0002 /* CCA, EP11: usage (no admin) msg */
277 #define AP_MSG_FLAG_ADMIN 0x0004 /* CCA, EP11: admin (=control) msg */
280 * ap_init_message() - Initialize ap_message.
281 * Initialize a message before using. Otherwise this might result in
282 * unexpected behaviour.
284 static inline void ap_init_message(struct ap_message *ap_msg)
286 memset(ap_msg, 0, sizeof(*ap_msg));
290 * ap_release_message() - Release ap_message.
291 * Releases all memory used internal within the ap_message struct
292 * Currently this is the message and private field.
294 static inline void ap_release_message(struct ap_message *ap_msg)
296 kfree_sensitive(ap_msg->msg);
297 kfree_sensitive(ap_msg->private);
301 * Note: don't use ap_send/ap_recv after using ap_queue_message
302 * for the first time. Otherwise the ap message queue will get
305 int ap_send(ap_qid_t qid, unsigned long psmid, void *msg, size_t msglen);
306 int ap_recv(ap_qid_t qid, unsigned long *psmid, void *msg, size_t msglen);
308 enum ap_sm_wait ap_sm_event(struct ap_queue *aq, enum ap_sm_event event);
309 enum ap_sm_wait ap_sm_event_loop(struct ap_queue *aq, enum ap_sm_event event);
311 int ap_queue_message(struct ap_queue *aq, struct ap_message *ap_msg);
312 void ap_cancel_message(struct ap_queue *aq, struct ap_message *ap_msg);
313 void ap_flush_queue(struct ap_queue *aq);
315 void *ap_airq_ptr(void);
316 int ap_sb_available(void);
317 void ap_wait(enum ap_sm_wait wait);
318 void ap_request_timeout(struct timer_list *t);
319 void ap_bus_force_rescan(void);
321 int ap_test_config_usage_domain(unsigned int domain);
322 int ap_test_config_ctrl_domain(unsigned int domain);
324 void ap_queue_init_reply(struct ap_queue *aq, struct ap_message *ap_msg);
325 struct ap_queue *ap_queue_create(ap_qid_t qid, int device_type);
326 void ap_queue_prepare_remove(struct ap_queue *aq);
327 void ap_queue_remove(struct ap_queue *aq);
328 void ap_queue_init_state(struct ap_queue *aq);
330 struct ap_card *ap_card_create(int id, int queue_depth, int raw_type,
331 int comp_type, unsigned int functions, int ml);
333 #define APMASKSIZE (BITS_TO_LONGS(AP_DEVICES) * sizeof(unsigned long))
334 #define AQMASKSIZE (BITS_TO_LONGS(AP_DOMAINS) * sizeof(unsigned long))
337 unsigned long ioctlm[BITS_TO_LONGS(AP_IOCTLS)];
338 unsigned long apm[BITS_TO_LONGS(AP_DEVICES)];
339 unsigned long aqm[BITS_TO_LONGS(AP_DOMAINS)];
340 unsigned long adm[BITS_TO_LONGS(AP_DOMAINS)];
343 extern struct ap_perms ap_perms;
344 extern struct mutex ap_perms_mutex;
347 * Get ap_queue device for this qid.
348 * Returns ptr to the struct ap_queue device or NULL if there
349 * was no ap_queue device with this qid found. When something is
350 * found, the reference count of the embedded device is increased.
351 * So the caller has to decrease the reference count after use
352 * with a call to put_device(&aq->ap_dev.device).
354 struct ap_queue *ap_get_qdev(ap_qid_t qid);
357 * check APQN for owned/reserved by ap bus and default driver(s).
358 * Checks if this APQN is or will be in use by the ap bus
359 * and the default set of drivers.
360 * If yes, returns 1, if not returns 0. On error a negative
361 * errno value is returned.
363 int ap_owned_by_def_drv(int card, int queue);
366 * check 'matrix' of APQNs for owned/reserved by ap bus and
368 * Checks if there is at least one APQN in the given 'matrix'
369 * marked as owned/reserved by the ap bus and default driver(s).
370 * If such an APQN is found the return value is 1, otherwise
371 * 0 is returned. On error a negative errno value is returned.
372 * The parameter apm is a bitmask which should be declared
373 * as DECLARE_BITMAP(apm, AP_DEVICES), the aqm parameter is
374 * similar, should be declared as DECLARE_BITMAP(aqm, AP_DOMAINS).
376 int ap_apqn_in_matrix_owned_by_def_drv(unsigned long *apm,
380 * ap_parse_mask_str() - helper function to parse a bitmap string
381 * and clear/set the bits in the bitmap accordingly. The string may be
382 * given as absolute value, a hex string like 0x1F2E3D4C5B6A" simple
383 * overwriting the current content of the bitmap. Or as relative string
384 * like "+1-16,-32,-0x40,+128" where only single bits or ranges of
385 * bits are cleared or set. Distinction is done based on the very
386 * first character which may be '+' or '-' for the relative string
387 * and othewise assume to be an absolute value string. If parsing fails
388 * a negative errno value is returned. All arguments and bitmaps are
391 int ap_parse_mask_str(const char *str,
392 unsigned long *bitmap, int bits,
396 * Interface to wait for the AP bus to have done one initial ap bus
397 * scan and all detected APQNs have been bound to device drivers.
398 * If these both conditions are not fulfilled, this function blocks
399 * on a condition with wait_for_completion_killable_timeout().
400 * If these both conditions are fulfilled (before the timeout hits)
401 * the return value is 0. If the timeout (in jiffies) hits instead
402 * -ETIME is returned. On failures negative return values are
403 * returned to the caller.
405 int ap_wait_init_apqn_bindings_complete(unsigned long timeout);
407 void ap_send_config_uevent(struct ap_device *ap_dev, bool cfg);
408 void ap_send_online_uevent(struct ap_device *ap_dev, int online);
410 #endif /* _AP_BUS_H_ */