2 * Copyright IBM Corp. 2006
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>
9 * Adjunct processor bus header file.
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)
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.
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.
29 #include <linux/device.h>
30 #include <linux/mod_devicetable.h>
31 #include <linux/types.h>
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_RESET_TIMEOUT (HZ/2) /* Time in ticks for reset timeouts. */
37 #define AP_CONFIG_TIME 30 /* Time in seconds between AP bus rescans. */
38 #define AP_POLL_TIME 1 /* Time in ticks between receive polls. */
40 extern int ap_domain_index;
43 * The ap_qid_t identifier of an ap queue. It contains a
44 * 6 bit device index and a 4 bit queue index (domain).
46 typedef unsigned int ap_qid_t;
48 #define AP_MKQID(_device,_queue) (((_device) & 63) << 8 | ((_queue) & 15))
49 #define AP_QID_DEVICE(_qid) (((_qid) >> 8) & 63)
50 #define AP_QID_QUEUE(_qid) ((_qid) & 15)
53 * structy ap_queue_status - Holds the AP queue status.
54 * @queue_empty: Shows if queue is empty
55 * @replies_waiting: Waiting replies
56 * @queue_full: Is 1 if the queue is full
58 * @int_enabled: Shows if interrupts are enabled for the AP
59 * @response_conde: Holds the 8 bit response code
62 * The ap queue status word is returned by all three AP functions
63 * (PQAP, NQAP and DQAP). There's a set of flags in the first
64 * byte, followed by a 1 byte response code.
66 struct ap_queue_status {
67 unsigned int queue_empty : 1;
68 unsigned int replies_waiting : 1;
69 unsigned int queue_full : 1;
70 unsigned int pad1 : 4;
71 unsigned int int_enabled : 1;
72 unsigned int response_code : 8;
73 unsigned int pad2 : 16;
76 #define AP_QUEUE_STATUS_INVALID \
77 { 1, 1, 1, 0xF, 1, 0xFF, 0xFFFF }
80 int ap_queue_status_invalid_test(struct ap_queue_status *status)
82 struct ap_queue_status invalid = AP_QUEUE_STATUS_INVALID;
83 return !(memcmp(status, &invalid, sizeof(struct ap_queue_status)));
86 #define MAX_AP_FACILITY 31
88 static inline int test_ap_facility(unsigned int function, unsigned int nr)
90 if (nr > MAX_AP_FACILITY)
92 return function & (unsigned int)(0x80000000 >> nr);
95 #define AP_RESPONSE_NORMAL 0x00
96 #define AP_RESPONSE_Q_NOT_AVAIL 0x01
97 #define AP_RESPONSE_RESET_IN_PROGRESS 0x02
98 #define AP_RESPONSE_DECONFIGURED 0x03
99 #define AP_RESPONSE_CHECKSTOPPED 0x04
100 #define AP_RESPONSE_BUSY 0x05
101 #define AP_RESPONSE_INVALID_ADDRESS 0x06
102 #define AP_RESPONSE_OTHERWISE_CHANGED 0x07
103 #define AP_RESPONSE_Q_FULL 0x10
104 #define AP_RESPONSE_NO_PENDING_REPLY 0x10
105 #define AP_RESPONSE_INDEX_TOO_BIG 0x11
106 #define AP_RESPONSE_NO_FIRST_PART 0x13
107 #define AP_RESPONSE_MESSAGE_TOO_BIG 0x15
108 #define AP_RESPONSE_REQ_FAC_NOT_INST 0x16
113 #define AP_DEVICE_TYPE_PCICC 3
114 #define AP_DEVICE_TYPE_PCICA 4
115 #define AP_DEVICE_TYPE_PCIXCC 5
116 #define AP_DEVICE_TYPE_CEX2A 6
117 #define AP_DEVICE_TYPE_CEX2C 7
118 #define AP_DEVICE_TYPE_CEX3A 8
119 #define AP_DEVICE_TYPE_CEX3C 9
122 * AP reset flag states
124 #define AP_RESET_IGNORE 0 /* request timeout will be ignored */
125 #define AP_RESET_ARMED 1 /* request timeout timer is active */
126 #define AP_RESET_DO 2 /* AP reset required */
132 struct device_driver driver;
133 struct ap_device_id *ids;
135 int (*probe)(struct ap_device *);
136 void (*remove)(struct ap_device *);
137 int request_timeout; /* request timeout in jiffies */
140 #define to_ap_drv(x) container_of((x), struct ap_driver, driver)
142 int ap_driver_register(struct ap_driver *, struct module *, char *);
143 void ap_driver_unregister(struct ap_driver *);
146 struct device device;
147 struct ap_driver *drv; /* Pointer to AP device driver. */
148 spinlock_t lock; /* Per device lock. */
149 struct list_head list; /* private list of all AP devices. */
151 ap_qid_t qid; /* AP queue id. */
152 int queue_depth; /* AP queue depth.*/
153 int device_type; /* AP device type. */
154 int unregistered; /* marks AP device as unregistered */
155 struct timer_list timeout; /* Timer for request timeouts. */
156 int reset; /* Reset required after req. timeout. */
158 int queue_count; /* # messages currently on AP queue. */
160 struct list_head pendingq; /* List of message sent to AP queue. */
161 int pendingq_count; /* # requests on pendingq list. */
162 struct list_head requestq; /* List of message yet to be sent. */
163 int requestq_count; /* # requests on requestq list. */
164 int total_request_count; /* # requests ever for this AP device. */
166 struct ap_message *reply; /* Per device reply message. */
168 void *private; /* ap driver private pointer. */
171 #define to_ap_dev(x) container_of((x), struct ap_device, device)
174 struct list_head list; /* Request queueing. */
175 unsigned long long psmid; /* Message id. */
176 void *message; /* Pointer to message buffer. */
177 size_t length; /* Message length. */
179 void *private; /* ap driver private pointer. */
180 unsigned int special:1; /* Used for special commands. */
181 /* receive is called from tasklet context */
182 void (*receive)(struct ap_device *, struct ap_message *,
183 struct ap_message *);
186 #define AP_DEVICE(dt) \
188 .match_flags=AP_DEVICE_ID_MATCH_DEVICE_TYPE,
191 * ap_init_message() - Initialize ap_message.
192 * Initialize a message before using. Otherwise this might result in
193 * unexpected behaviour.
195 static inline void ap_init_message(struct ap_message *ap_msg)
200 ap_msg->receive = NULL;
204 * Note: don't use ap_send/ap_recv after using ap_queue_message
205 * for the first time. Otherwise the ap message queue will get
208 int ap_send(ap_qid_t, unsigned long long, void *, size_t);
209 int ap_recv(ap_qid_t, unsigned long long *, void *, size_t);
211 void ap_queue_message(struct ap_device *ap_dev, struct ap_message *ap_msg);
212 void ap_cancel_message(struct ap_device *ap_dev, struct ap_message *ap_msg);
213 void ap_flush_queue(struct ap_device *ap_dev);
215 int ap_module_init(void);
216 void ap_module_exit(void);
218 int ap_4096_commands_available(ap_qid_t qid);
220 #endif /* _AP_BUS_H_ */