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1 | /* | |
2 | * Copyright IBM Corp. 2006, 2012 | |
3 | * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com> | |
4 | * Martin Schwidefsky <schwidefsky@de.ibm.com> | |
5 | * Ralph Wuerthner <rwuerthn@de.ibm.com> | |
6 | * Felix Beck <felix.beck@de.ibm.com> | |
7 | * Holger Dengler <hd@linux.vnet.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 256 /* Number of AP domains. */ | |
35 | #define AP_RESET_TIMEOUT (HZ*0.7) /* Time in ticks for reset timeouts. */ | |
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 | ||
39 | #define AP_POLL_IMMEDIATELY 1 /* continue running poll tasklet */ | |
40 | #define AP_POLL_AFTER_TIMEOUT 2 /* run poll tasklet again after timout */ | |
41 | ||
42 | extern 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 | */ | |
48 | typedef unsigned int ap_qid_t; | |
49 | ||
50 | #define AP_MKQID(_device, _queue) (((_device) & 63) << 8 | ((_queue) & 255)) | |
51 | #define AP_QID_DEVICE(_qid) (((_qid) >> 8) & 63) | |
52 | #define AP_QID_QUEUE(_qid) ((_qid) & 255) | |
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 | */ | |
68 | struct 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 | ||
79 | #define AP_MAX_BITS 31 | |
80 | static inline int ap_test_bit(unsigned int *ptr, unsigned int nr) | |
81 | { | |
82 | if (nr > AP_MAX_BITS) | |
83 | return 0; | |
84 | return (*ptr & (0x80000000u >> nr)) != 0; | |
85 | } | |
86 | ||
87 | #define AP_RESPONSE_NORMAL 0x00 | |
88 | #define AP_RESPONSE_Q_NOT_AVAIL 0x01 | |
89 | #define AP_RESPONSE_RESET_IN_PROGRESS 0x02 | |
90 | #define AP_RESPONSE_DECONFIGURED 0x03 | |
91 | #define AP_RESPONSE_CHECKSTOPPED 0x04 | |
92 | #define AP_RESPONSE_BUSY 0x05 | |
93 | #define AP_RESPONSE_INVALID_ADDRESS 0x06 | |
94 | #define AP_RESPONSE_OTHERWISE_CHANGED 0x07 | |
95 | #define AP_RESPONSE_Q_FULL 0x10 | |
96 | #define AP_RESPONSE_NO_PENDING_REPLY 0x10 | |
97 | #define AP_RESPONSE_INDEX_TOO_BIG 0x11 | |
98 | #define AP_RESPONSE_NO_FIRST_PART 0x13 | |
99 | #define AP_RESPONSE_MESSAGE_TOO_BIG 0x15 | |
100 | #define AP_RESPONSE_REQ_FAC_NOT_INST 0x16 | |
101 | ||
102 | /* | |
103 | * Known device types | |
104 | */ | |
105 | #define AP_DEVICE_TYPE_PCICC 3 | |
106 | #define AP_DEVICE_TYPE_PCICA 4 | |
107 | #define AP_DEVICE_TYPE_PCIXCC 5 | |
108 | #define AP_DEVICE_TYPE_CEX2A 6 | |
109 | #define AP_DEVICE_TYPE_CEX2C 7 | |
110 | #define AP_DEVICE_TYPE_CEX3A 8 | |
111 | #define AP_DEVICE_TYPE_CEX3C 9 | |
112 | #define AP_DEVICE_TYPE_CEX4 10 | |
113 | #define AP_DEVICE_TYPE_CEX5 11 | |
114 | ||
115 | /* | |
116 | * Known function facilities | |
117 | */ | |
118 | #define AP_FUNC_MEX4K 1 | |
119 | #define AP_FUNC_CRT4K 2 | |
120 | #define AP_FUNC_COPRO 3 | |
121 | #define AP_FUNC_ACCEL 4 | |
122 | #define AP_FUNC_EP11 5 | |
123 | #define AP_FUNC_APXA 6 | |
124 | ||
125 | /* | |
126 | * AP reset flag states | |
127 | */ | |
128 | #define AP_RESET_IGNORE 0 /* request timeout will be ignored */ | |
129 | #define AP_RESET_ARMED 1 /* request timeout timer is active */ | |
130 | #define AP_RESET_DO 2 /* AP reset required */ | |
131 | #define AP_RESET_IN_PROGRESS 3 /* AP reset in progress */ | |
132 | ||
133 | /* | |
134 | * AP interrupt states | |
135 | */ | |
136 | #define AP_INTR_DISABLED 0 /* AP interrupt disabled */ | |
137 | #define AP_INTR_ENABLED 1 /* AP interrupt enabled */ | |
138 | #define AP_INTR_IN_PROGRESS 3 /* AP interrupt in progress */ | |
139 | ||
140 | struct ap_device; | |
141 | struct ap_message; | |
142 | ||
143 | struct ap_driver { | |
144 | struct device_driver driver; | |
145 | struct ap_device_id *ids; | |
146 | ||
147 | int (*probe)(struct ap_device *); | |
148 | void (*remove)(struct ap_device *); | |
149 | int request_timeout; /* request timeout in jiffies */ | |
150 | }; | |
151 | ||
152 | #define to_ap_drv(x) container_of((x), struct ap_driver, driver) | |
153 | ||
154 | int ap_driver_register(struct ap_driver *, struct module *, char *); | |
155 | void ap_driver_unregister(struct ap_driver *); | |
156 | ||
157 | struct ap_device { | |
158 | struct device device; | |
159 | struct ap_driver *drv; /* Pointer to AP device driver. */ | |
160 | spinlock_t lock; /* Per device lock. */ | |
161 | struct list_head list; /* private list of all AP devices. */ | |
162 | ||
163 | ap_qid_t qid; /* AP queue id. */ | |
164 | int queue_depth; /* AP queue depth.*/ | |
165 | int device_type; /* AP device type. */ | |
166 | int raw_hwtype; /* AP raw hardware type. */ | |
167 | unsigned int functions; /* AP device function bitfield. */ | |
168 | int unregistered; /* marks AP device as unregistered */ | |
169 | struct timer_list timeout; /* Timer for request timeouts. */ | |
170 | int reset; /* Reset required after req. timeout. */ | |
171 | ||
172 | int interrupt; /* indicate if interrupts are enabled */ | |
173 | int queue_count; /* # messages currently on AP queue. */ | |
174 | ||
175 | struct list_head pendingq; /* List of message sent to AP queue. */ | |
176 | int pendingq_count; /* # requests on pendingq list. */ | |
177 | struct list_head requestq; /* List of message yet to be sent. */ | |
178 | int requestq_count; /* # requests on requestq list. */ | |
179 | int total_request_count; /* # requests ever for this AP device. */ | |
180 | ||
181 | struct ap_message *reply; /* Per device reply message. */ | |
182 | ||
183 | void *private; /* ap driver private pointer. */ | |
184 | }; | |
185 | ||
186 | #define to_ap_dev(x) container_of((x), struct ap_device, device) | |
187 | ||
188 | struct ap_message { | |
189 | struct list_head list; /* Request queueing. */ | |
190 | unsigned long long psmid; /* Message id. */ | |
191 | void *message; /* Pointer to message buffer. */ | |
192 | size_t length; /* Message length. */ | |
193 | ||
194 | void *private; /* ap driver private pointer. */ | |
195 | unsigned int special:1; /* Used for special commands. */ | |
196 | /* receive is called from tasklet context */ | |
197 | void (*receive)(struct ap_device *, struct ap_message *, | |
198 | struct ap_message *); | |
199 | }; | |
200 | ||
201 | struct ap_config_info { | |
202 | unsigned int special_command:1; | |
203 | unsigned int ap_extended:1; | |
204 | unsigned char reserved1:6; | |
205 | unsigned char reserved2[15]; | |
206 | unsigned int apm[8]; /* AP ID mask */ | |
207 | unsigned int aqm[8]; /* AP queue mask */ | |
208 | unsigned int adm[8]; /* AP domain mask */ | |
209 | unsigned char reserved4[16]; | |
210 | } __packed; | |
211 | ||
212 | #define AP_DEVICE(dt) \ | |
213 | .dev_type=(dt), \ | |
214 | .match_flags=AP_DEVICE_ID_MATCH_DEVICE_TYPE, | |
215 | ||
216 | /** | |
217 | * ap_init_message() - Initialize ap_message. | |
218 | * Initialize a message before using. Otherwise this might result in | |
219 | * unexpected behaviour. | |
220 | */ | |
221 | static inline void ap_init_message(struct ap_message *ap_msg) | |
222 | { | |
223 | ap_msg->psmid = 0; | |
224 | ap_msg->length = 0; | |
225 | ap_msg->special = 0; | |
226 | ap_msg->receive = NULL; | |
227 | } | |
228 | ||
229 | /* | |
230 | * Note: don't use ap_send/ap_recv after using ap_queue_message | |
231 | * for the first time. Otherwise the ap message queue will get | |
232 | * confused. | |
233 | */ | |
234 | int ap_send(ap_qid_t, unsigned long long, void *, size_t); | |
235 | int ap_recv(ap_qid_t, unsigned long long *, void *, size_t); | |
236 | ||
237 | void ap_queue_message(struct ap_device *ap_dev, struct ap_message *ap_msg); | |
238 | void ap_cancel_message(struct ap_device *ap_dev, struct ap_message *ap_msg); | |
239 | void ap_flush_queue(struct ap_device *ap_dev); | |
240 | void ap_bus_force_rescan(void); | |
241 | ||
242 | int ap_module_init(void); | |
243 | void ap_module_exit(void); | |
244 | ||
245 | #endif /* _AP_BUS_H_ */ |