[linux-2.6-block.git] / drivers / s390 / crypto / ap_bus.h

/*
 * linux/drivers/s390/crypto/ap_bus.h
 *
 * Copyright (C) 2006 IBM Corporation
 * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
 *	      Martin Schwidefsky <schwidefsky@de.ibm.com>
 *	      Ralph Wuerthner <rwuerthn@de.ibm.com>
 *
 * Adjunct processor bus header file.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifndef _AP_BUS_H_
#define _AP_BUS_H_

#include <linux/device.h>
#include <linux/mod_devicetable.h>
#include <linux/types.h>

#define AP_DEVICES 64		/* Number of AP devices. */
#define AP_DOMAINS 16		/* Number of AP domains. */
#define AP_MAX_RESET 90		/* Maximum number of resets. */
#define AP_RESET_TIMEOUT (HZ/2)	/* Time in ticks for reset timeouts. */
#define AP_CONFIG_TIME 30	/* Time in seconds between AP bus rescans. */
#define AP_POLL_TIME 1		/* Time in ticks between receive polls. */

extern int ap_domain_index;

/**
 * The ap_qid_t identifier of an ap queue. It contains a
 * 6 bit device index and a 4 bit queue index (domain).
 */
typedef unsigned int ap_qid_t;

#define AP_MKQID(_device,_queue) (((_device) & 63) << 8 | ((_queue) & 15))
#define AP_QID_DEVICE(_qid) (((_qid) >> 8) & 63)
#define AP_QID_QUEUE(_qid) ((_qid) & 15)

/**
 * The ap queue status word is returned by all three AP functions
 * (PQAP, NQAP and DQAP).  There's a set of flags in the first
 * byte, followed by a 1 byte response code.
 */
struct ap_queue_status {
	unsigned int queue_empty	: 1;
	unsigned int replies_waiting	: 1;
	unsigned int queue_full		: 1;
	unsigned int pad1		: 5;
	unsigned int response_code	: 8;
	unsigned int pad2		: 16;
};

#define AP_RESPONSE_NORMAL		0x00
#define AP_RESPONSE_Q_NOT_AVAIL		0x01
#define AP_RESPONSE_RESET_IN_PROGRESS	0x02
#define AP_RESPONSE_DECONFIGURED	0x03
#define AP_RESPONSE_CHECKSTOPPED	0x04
#define AP_RESPONSE_BUSY		0x05
#define AP_RESPONSE_Q_FULL		0x10
#define AP_RESPONSE_NO_PENDING_REPLY	0x10
#define AP_RESPONSE_INDEX_TOO_BIG	0x11
#define AP_RESPONSE_NO_FIRST_PART	0x13
#define AP_RESPONSE_MESSAGE_TOO_BIG	0x15

/**
 * Known device types
 */
#define AP_DEVICE_TYPE_PCICC	3
#define AP_DEVICE_TYPE_PCICA	4
#define AP_DEVICE_TYPE_PCIXCC	5
#define AP_DEVICE_TYPE_CEX2A	6
#define AP_DEVICE_TYPE_CEX2C	7

/**
 * AP reset flag states
 */
#define AP_RESET_IGNORE	0	/* request timeout will be ignored */
#define AP_RESET_ARMED	1	/* request timeout timer is active */
#define AP_RESET_DO	2	/* AP reset required */

struct ap_device;
struct ap_message;

struct ap_driver {
	struct device_driver driver;
	struct ap_device_id *ids;

	int (*probe)(struct ap_device *);
	void (*remove)(struct ap_device *);
	/* receive is called from tasklet context */
	void (*receive)(struct ap_device *, struct ap_message *,
			struct ap_message *);
	int request_timeout;		/* request timeout in jiffies */
};

#define to_ap_drv(x) container_of((x), struct ap_driver, driver)

int ap_driver_register(struct ap_driver *, struct module *, char *);
void ap_driver_unregister(struct ap_driver *);

struct ap_device {
	struct device device;
	struct ap_driver *drv;		/* Pointer to AP device driver. */
	spinlock_t lock;		/* Per device lock. */
	struct list_head list;		/* private list of all AP devices. */

	ap_qid_t qid;			/* AP queue id. */
	int queue_depth;		/* AP queue depth.*/
	int device_type;		/* AP device type. */
	int unregistered;		/* marks AP device as unregistered */
	struct timer_list timeout;	/* Timer for request timeouts. */
	int reset;			/* Reset required after req. timeout. */

	int queue_count;		/* # messages currently on AP queue. */

	struct list_head pendingq;	/* List of message sent to AP queue. */
	int pendingq_count;		/* # requests on pendingq list. */
	struct list_head requestq;	/* List of message yet to be sent. */
	int requestq_count;		/* # requests on requestq list. */
	int total_request_count;	/* # requests ever for this AP device. */

	struct ap_message *reply;	/* Per device reply message. */

	void *private;			/* ap driver private pointer. */
};

#define to_ap_dev(x) container_of((x), struct ap_device, device)

struct ap_message {
	struct list_head list;		/* Request queueing. */
	unsigned long long psmid;	/* Message id. */
	void *message;			/* Pointer to message buffer. */
	size_t length;			/* Message length. */

	void *private;			/* ap driver private pointer. */
};

#define AP_DEVICE(dt)					\
	.dev_type=(dt),					\
	.match_flags=AP_DEVICE_ID_MATCH_DEVICE_TYPE,

/**
 * Note: don't use ap_send/ap_recv after using ap_queue_message
 * for the first time. Otherwise the ap message queue will get
 * confused.
 */
int ap_send(ap_qid_t, unsigned long long, void *, size_t);
int ap_recv(ap_qid_t, unsigned long long *, void *, size_t);

void ap_queue_message(struct ap_device *ap_dev, struct ap_message *ap_msg);
void ap_cancel_message(struct ap_device *ap_dev, struct ap_message *ap_msg);
void ap_flush_queue(struct ap_device *ap_dev);

int ap_module_init(void);
void ap_module_exit(void);

#endif /* _AP_BUS_H_ */
Commit	Line	Data
1534c382 MS	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	*
	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 16 /* Number of AP domains. */
	35	#define AP_MAX_RESET 90 /* Maximum number of resets. */
af512ed0	36	#define AP_RESET_TIMEOUT (HZ/2) /* Time in ticks for reset timeouts. */
1534c382 MS	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. */
	39
	40	extern int ap_domain_index;
	41
	42	/**
	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).
	45	*/
	46	typedef unsigned int ap_qid_t;
	47
	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)
	51
	52	/**
	53	* The ap queue status word is returned by all three AP functions
	54	* (PQAP, NQAP and DQAP). There's a set of flags in the first
	55	* byte, followed by a 1 byte response code.
	56	*/
	57	struct ap_queue_status {
	58	unsigned int queue_empty : 1;
	59	unsigned int replies_waiting : 1;
	60	unsigned int queue_full : 1;
	61	unsigned int pad1 : 5;
	62	unsigned int response_code : 8;
	63	unsigned int pad2 : 16;
	64	};
	65
	66	#define AP_RESPONSE_NORMAL 0x00
	67	#define AP_RESPONSE_Q_NOT_AVAIL 0x01
	68	#define AP_RESPONSE_RESET_IN_PROGRESS 0x02
	69	#define AP_RESPONSE_DECONFIGURED 0x03
	70	#define AP_RESPONSE_CHECKSTOPPED 0x04
	71	#define AP_RESPONSE_BUSY 0x05
	72	#define AP_RESPONSE_Q_FULL 0x10
	73	#define AP_RESPONSE_NO_PENDING_REPLY 0x10
	74	#define AP_RESPONSE_INDEX_TOO_BIG 0x11
	75	#define AP_RESPONSE_NO_FIRST_PART 0x13
	76	#define AP_RESPONSE_MESSAGE_TOO_BIG 0x15
	77
	78	/**
	79	* Known device types
	80	*/
	81	#define AP_DEVICE_TYPE_PCICC 3
	82	#define AP_DEVICE_TYPE_PCICA 4
	83	#define AP_DEVICE_TYPE_PCIXCC 5
	84	#define AP_DEVICE_TYPE_CEX2A 6
	85	#define AP_DEVICE_TYPE_CEX2C 7
	86
af512ed0 RW	87	/**
	88	* AP reset flag states
	89	*/
	90	#define AP_RESET_IGNORE 0 /* request timeout will be ignored */
	91	#define AP_RESET_ARMED 1 /* request timeout timer is active */
	92	#define AP_RESET_DO 2 /* AP reset required */
	93
1534c382 MS	94	struct ap_device;
	95	struct ap_message;
	96
	97	struct ap_driver {
	98	struct device_driver driver;
	99	struct ap_device_id *ids;
	100
	101	int (probe)(struct ap_device );
	102	void (remove)(struct ap_device );
	103	/* receive is called from tasklet context */
	104	void (receive)(struct ap_device , struct ap_message *,
	105	struct ap_message *);
af512ed0	106	int request_timeout; /* request timeout in jiffies */
1534c382 MS	107	};
	108
	109	#define to_ap_drv(x) container_of((x), struct ap_driver, driver)
	110
	111	int ap_driver_register(struct ap_driver , struct module , char *);
	112	void ap_driver_unregister(struct ap_driver *);
	113
	114	struct ap_device {
	115	struct device device;
	116	struct ap_driver drv; / Pointer to AP device driver. */
	117	spinlock_t lock; /* Per device lock. */
cf352ce0	118	struct list_head list; /* private list of all AP devices. */
1534c382 MS	119
	120	ap_qid_t qid; /* AP queue id. */
	121	int queue_depth; /* AP queue depth.*/
	122	int device_type; /* AP device type. */
	123	int unregistered; /* marks AP device as unregistered */
af512ed0 RW	124	struct timer_list timeout; /* Timer for request timeouts. */
af512ed0 RW	125	int reset; /* Reset required after req. timeout. */
1534c382 MS	126
	127	int queue_count; /* # messages currently on AP queue. */
	128
	129	struct list_head pendingq; /* List of message sent to AP queue. */
	130	int pendingq_count; /* # requests on pendingq list. */
	131	struct list_head requestq; /* List of message yet to be sent. */
	132	int requestq_count; /* # requests on requestq list. */
	133	int total_request_count; /* # requests ever for this AP device. */
	134
	135	struct ap_message reply; / Per device reply message. */
	136
	137	void private; / ap driver private pointer. */
	138	};
	139
	140	#define to_ap_dev(x) container_of((x), struct ap_device, device)
	141
	142	struct ap_message {
	143	struct list_head list; /* Request queueing. */
	144	unsigned long long psmid; /* Message id. */
	145	void message; / Pointer to message buffer. */
	146	size_t length; /* Message length. */
	147
	148	void private; / ap driver private pointer. */
	149	};
	150
	151	#define AP_DEVICE(dt) \
	152	.dev_type=(dt), \
	153	.match_flags=AP_DEVICE_ID_MATCH_DEVICE_TYPE,
	154
	155	/**
	156	* Note: don't use ap_send/ap_recv after using ap_queue_message
	157	* for the first time. Otherwise the ap message queue will get
	158	* confused.
	159	*/
	160	int ap_send(ap_qid_t, unsigned long long, void *, size_t);
	161	int ap_recv(ap_qid_t, unsigned long long , void , size_t);
	162
	163	void ap_queue_message(struct ap_device ap_dev, struct ap_message ap_msg);
	164	void ap_cancel_message(struct ap_device ap_dev, struct ap_message ap_msg);
	165	void ap_flush_queue(struct ap_device *ap_dev);
	166
	167	int ap_module_init(void);
	168	void ap_module_exit(void);
	169
	170	#endif /* _AP_BUS_H_ */